usr.sbin/makefs/hammer2/hammer2.h

   1 /*
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2022 Tomohiro Kusumi <tkusumi@netbsd.org>
   5  * Copyright (c) 2011-2022 The DragonFly Project.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to The DragonFly Project
   8  * by Matthew Dillon <dillon@dragonflybsd.org>
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  * 3. Neither the name of The DragonFly Project nor the names of its
  21  *    contributors may be used to endorse or promote products derived
  22  *    from this software without specific, prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  27  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  28  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  29  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  30  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  31  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  32  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  33  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  34  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
  40  *
  41  * This header file contains structures used internally by the HAMMER2
  42  * implementation.  See hammer2_disk.h for on-disk structures.
  43  *
  44  * There is an in-memory representation of all on-media data structure.
  45  * Almost everything is represented by a hammer2_chain structure in-memory.
  46  * Other higher-level structures typically map to chains.
  47  *
  48  * A great deal of data is accessed simply via its buffer cache buffer,
  49  * which is mapped for the duration of the chain's lock.  Hammer2 must
  50  * implement its own buffer cache layer on top of the system layer to
  51  * allow for different threads to lock different sub-block-sized buffers.
  52  *
  53  * When modifications are made to a chain a new filesystem block must be
  54  * allocated.  Multiple modifications do not typically allocate new blocks
  55  * until the current block has been flushed.  Flushes do not block the
  56  * front-end unless the front-end operation crosses the current inode being
  57  * flushed.
  58  *
  59  * The in-memory representation may remain cached (for example in order to
  60  * placemark clustering locks) even after the related data has been
  61  * detached.
  62  */
  63
  64 #ifndef _VFS_HAMMER2_HAMMER2_H_
  65 #define _VFS_HAMMER2_HAMMER2_H_
  66
  67 #ifdef _KERNEL
  68 #error "_KERNEL shouldn't be defined"
  69 #endif
  70 #ifdef _KERNEL_STRUCTURES
  71 #error "_KERNEL_STRUCTURES shouldn't be defined"
  72 #endif
  73
  74 #ifdef _KERNEL
  75 #include <sys/param.h>
  76 #endif
  77 #include <sys/types.h>
  78 #ifdef _KERNEL
  79 #include <sys/kernel.h>
  80 #endif
  81 //#include <sys/conf.h>
  82 #ifdef _KERNEL
  83 #include <sys/systm.h>
  84 #endif
  85 //#include <sys/diskslice.h>
  86 #include <sys/tree.h>
  87 //#include <sys/malloc.h>
  88 #include <sys/mount.h>
  89 /*
  90 #include <sys/vnode.h>
  91 #include <sys/proc.h>
  92 #include <sys/priv.h>
  93 #include <sys/stat.h>
  94 #include <sys/thread.h>
  95 #include <sys/lockf.h>
  96 #include <sys/buf.h>
  97 */
  98 #include <sys/queue.h>
  99 /*
 100 #include <sys/limits.h>
 101 #include <sys/dmsg.h>
 102 #include <sys/mutex.h>
 103 #include <sys/lock.h>
 104 #include <sys/file.h>
 105 #include <sys/objcache.h>
 106 */
 107
 108 #ifdef _KERNEL
 109 #include <sys/signal2.h>
 110 #include <sys/buf2.h>
 111 #include <sys/mutex2.h>
 112 #include <sys/spinlock2.h>
 113 #endif
 114
 115 /*
 116 #include "hammer2_xxhash.h"
 117 #include "hammer2_disk.h"
 118 #include "hammer2_mount.h"
 119 #include "hammer2_ioctl.h"
 120 */
 121
 122 #include <sys/time.h>
 123 #include <sys/vfscache.h>
 124 #include <sys/errno.h>
 125
 126 #include <machine/atomic.h>
 127
 128 #include <unistd.h>
 129 #include <stdio.h>
 130 #include <stdlib.h>
 131 #include <stdint.h>
 132 #include <stdbool.h>
 133 #include <string.h>
 134
 135 #include <vfs/hammer2/hammer2_disk.h>
 136 #include <vfs/hammer2/hammer2_ioctl.h>
 137 #include <vfs/hammer2/hammer2_mount.h>
 138 #include <vfs/hammer2/hammer2_xxhash.h>
 139 #include <mkfs_hammer2.h>
 140
 141 #include "hammer2_compat.h"
 142
 143 struct hammer2_io;
 144 struct hammer2_chain;
 145 struct hammer2_inode;
 146 struct hammer2_depend;
 147 struct hammer2_dev;
 148 struct hammer2_pfs;
 149 union hammer2_xop;
 150
 151 /*
 152  * Mutex and lock shims.  Hammer2 requires support for asynchronous and
 153  * abortable locks, and both exclusive and shared spinlocks.  Normal
 154  * synchronous non-abortable locks can be substituted for spinlocks.
 155  */
 156 /*
 157 typedef mtx_t                           hammer2_mtx_t;
 158 typedef mtx_state_t                     hammer2_mtx_state_t;
 159
 160 typedef struct spinlock                 hammer2_spin_t;
 161
 162 #define hammer2_mtx_ex                  mtx_lock_ex_quick
 163 #define hammer2_mtx_ex_try              mtx_lock_ex_try
 164 #define hammer2_mtx_sh                  mtx_lock_sh_quick
 165 #define hammer2_mtx_sh_again            mtx_lock_sh_again
 166 #define hammer2_mtx_sh_try              mtx_lock_sh_try
 167 #define hammer2_mtx_unlock              mtx_unlock
 168 #define hammer2_mtx_upgrade_try         mtx_upgrade_try
 169 #define hammer2_mtx_downgrade           mtx_downgrade
 170 #define hammer2_mtx_owned               mtx_owned
 171 #define hammer2_mtx_init                mtx_init
 172 #define hammer2_mtx_temp_release        mtx_lock_temp_release
 173 #define hammer2_mtx_temp_restore        mtx_lock_temp_restore
 174 #define hammer2_mtx_refs                mtx_lockrefs
 175
 176 #define hammer2_spin_init               spin_init
 177 #define hammer2_spin_sh                 spin_lock_shared
 178 #define hammer2_spin_ex                 spin_lock
 179 #define hammer2_spin_unsh               spin_unlock_shared
 180 #define hammer2_spin_unex               spin_unlock
 181 #define hammer2_spin_lock_update        spin_lock_update
 182 #define hammer2_spin_unlock_update      spin_unlock_update
 183 */
 184
 185 TAILQ_HEAD(hammer2_xop_list, hammer2_xop_head);
 186 TAILQ_HEAD(hammer2_chain_list, hammer2_chain);
 187
 188 typedef struct hammer2_xop_list hammer2_xop_list_t;
 189
 190 /*
 191  * Cap the dynamic calculation for the maximum number of dirty
 192  * chains and dirty inodes allowed.
 193  */
 194 #define HAMMER2_LIMIT_DIRTY_CHAINS      (1024*1024)
 195 #define HAMMER2_LIMIT_DIRTY_INODES      (65536)
 196
 197 /*
 198  * The chain structure tracks a portion of the media topology from the
 199  * root (volume) down.  Chains represent volumes, inodes, indirect blocks,
 200  * data blocks, and freemap nodes and leafs.
 201  *
 202  * The chain structure utilizes a simple singly-homed topology and the
 203  * chain's in-memory topology will move around as the chains do, due mainly
 204  * to renames and indirect block creation.
 205  *
 206  * Block Table Updates
 207  *
 208  *      Block table updates for insertions and updates are delayed until the
 209  *      flush.  This allows us to avoid having to modify the parent chain
 210  *      all the way to the root.
 211  *
 212  *      Block table deletions are performed immediately (modifying the parent
 213  *      in the process) because the flush code uses the chain structure to
 214  *      track delayed updates and the chain will be (likely) gone or moved to
 215  *      another location in the topology after a deletion.
 216  *
 217  *      A prior iteration of the code tried to keep the relationship intact
 218  *      on deletes by doing a delete-duplicate operation on the chain, but
 219  *      it added way too much complexity to the codebase.
 220  *
 221  * Flush Synchronization
 222  *
 223  *      The flush code must flush modified chains bottom-up.  Because chain
 224  *      structures can shift around and are NOT topologically stable,
 225  *      modified chains are independently indexed for the flush.  As the flush
 226  *      runs it modifies (or further modifies) and updates the parents,
 227  *      propagating the flush all the way to the volume root.
 228  *
 229  *      Modifying front-end operations can occur during a flush but will block
 230  *      in two cases: (1) when the front-end tries to operate on the inode
 231  *      currently in the midst of being flushed and (2) if the front-end
 232  *      crosses an inode currently being flushed (such as during a rename).
 233  *      So, for example, if you rename directory "x" to "a/b/c/d/e/f/g/x" and
 234  *      the flusher is currently working on "a/b/c", the rename will block
 235  *      temporarily in order to ensure that "x" exists in one place or the
 236  *      other.
 237  *
 238  *      Meta-data statistics are updated by the flusher.  The front-end will
 239  *      make estimates but meta-data must be fully synchronized only during a
 240  *      flush in order to ensure that it remains correct across a crash.
 241  *
 242  *      Multiple flush synchronizations can theoretically be in-flight at the
 243  *      same time but the implementation is not coded to handle the case and
 244  *      currently serializes them.
 245  *
 246  * Snapshots:
 247  *
 248  *      Snapshots currently require the subdirectory tree being snapshotted
 249  *      to be flushed.  The snapshot then creates a new super-root inode which
 250  *      copies the flushed blockdata of the directory or file that was
 251  *      snapshotted.
 252  *
 253  * Radix tree NOTES:
 254  *
 255  *      - Note that the radix tree runs in powers of 2 only so sub-trees
 256  *        cannot straddle edges.
 257  */
 258 RB_HEAD(hammer2_chain_tree, hammer2_chain);
 259
 260 struct hammer2_reptrack {
 261         hammer2_spin_t  spin;
 262         struct hammer2_reptrack *next;
 263         struct hammer2_chain    *chain;
 264 };
 265
 266 /*
 267  * Core topology for chain (embedded in chain).  Protected by a spinlock.
 268  */
 269 struct hammer2_chain_core {
 270         hammer2_spin_t  spin;
 271         struct hammer2_reptrack *reptrack;
 272         struct hammer2_chain_tree rbtree; /* sub-chains */
 273         int             live_zero;      /* blockref array opt */
 274         u_int           live_count;     /* live (not deleted) chains in tree */
 275         u_int           chain_count;    /* live + deleted chains under core */
 276         int             generation;     /* generation number (inserts only) */
 277 };
 278
 279 typedef struct hammer2_chain_core hammer2_chain_core_t;
 280
 281 RB_HEAD(hammer2_io_tree, hammer2_io);
 282
 283 /*
 284  * DIO - Management structure wrapping system buffer cache.
 285  *
 286  * HAMMER2 uses an I/O abstraction that allows it to cache and manipulate
 287  * fixed-sized filesystem buffers frontend by variable-sized hammer2_chain
 288  * structures.
 289  */
 290 /* #define HAMMER2_IO_DEBUG */
 291
 292 #ifdef HAMMER2_IO_DEBUG
 293 #define HAMMER2_IO_DEBUG_ARGS   , const char *file, int line
 294 #define HAMMER2_IO_DEBUG_CALL   , file, line
 295 #define HAMMER2_IO_DEBUG_COUNT  2048
 296 #define HAMMER2_IO_DEBUG_MASK   (HAMMER2_IO_DEBUG_COUNT - 1)
 297 #else
 298 #define HAMMER2_IO_DEBUG_ARGS
 299 #define HAMMER2_IO_DEBUG_CALL
 300 #endif
 301
 302 struct hammer2_io {
 303         RB_ENTRY(hammer2_io) rbnode;    /* indexed by device offset */
 304         struct hammer2_dev *hmp;
 305         struct m_vnode  *devvp;
 306         struct m_buf    *bp;
 307         off_t           dbase;          /* offset of devvp within volumes */
 308         off_t           pbase;
 309         uint64_t        refs;
 310         int             psize;
 311         int             act;            /* activity */
 312         int             btype;          /* approximate BREF_TYPE_* */
 313         int             ticks;
 314         int             error;
 315 #ifdef HAMMER2_IO_DEBUG
 316         int             debug_index;
 317 #else
 318         int             unused01;
 319 #endif
 320         uint64_t        dedup_valid;    /* valid for dedup operation */
 321         uint64_t        dedup_alloc;    /* allocated / de-dupable */
 322 #ifdef HAMMER2_IO_DEBUG
 323         const char      *debug_file[HAMMER2_IO_DEBUG_COUNT];
 324         void            *debug_td[HAMMER2_IO_DEBUG_COUNT];
 325         int             debug_line[HAMMER2_IO_DEBUG_COUNT];
 326         uint64_t        debug_refs[HAMMER2_IO_DEBUG_COUNT];
 327 #endif
 328 };
 329
 330 typedef struct hammer2_io hammer2_io_t;
 331
 332 #define HAMMER2_DIO_INPROG      0x8000000000000000LLU   /* bio in progress */
 333 #define HAMMER2_DIO_GOOD        0x4000000000000000LLU   /* dio->bp is stable */
 334 #define HAMMER2_DIO_WAITING     0x2000000000000000LLU   /* wait on INPROG */
 335 #define HAMMER2_DIO_DIRTY       0x1000000000000000LLU   /* flush last drop */
 336 #define HAMMER2_DIO_FLUSH       0x0800000000000000LLU   /* immediate flush */
 337
 338 #define HAMMER2_DIO_MASK        0x00FFFFFFFFFFFFFFLLU
 339
 340 /*
 341  * Primary chain structure keeps track of the topology in-memory.
 342  */
 343 struct hammer2_chain {
 344         hammer2_mtx_t           lock;
 345         hammer2_chain_core_t    core;
 346         RB_ENTRY(hammer2_chain) rbnode;         /* live chain(s) */
 347         hammer2_blockref_t      bref;
 348         struct hammer2_chain    *parent;
 349         struct hammer2_dev      *hmp;
 350         struct hammer2_pfs      *pmp;           /* A PFS or super-root (spmp) */
 351
 352         struct lock     diolk;                  /* xop focus interlock */
 353         hammer2_io_t    *dio;                   /* physical data buffer */
 354         hammer2_media_data_t *data;             /* data pointer shortcut */
 355         u_int           bytes;                  /* physical data size */
 356         u_int           flags;
 357         u_int           refs;
 358         u_int           lockcnt;
 359         int             error;                  /* on-lock data error state */
 360         int             cache_index;            /* heur speeds up lookup */
 361
 362         TAILQ_ENTRY(hammer2_chain) lru_node;    /* 0-refs LRU */
 363 };
 364
 365 typedef struct hammer2_chain hammer2_chain_t;
 366
 367 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
 368 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
 369
 370 /*
 371  * Passed to hammer2_chain_create(), causes methods to be inherited from
 372  * parent.
 373  */
 374 #define HAMMER2_METH_DEFAULT            -1
 375
 376 /*
 377  * Special notes on flags:
 378  *
 379  * INITIAL      - This flag allows a chain to be created and for storage to
 380  *                be allocated without having to immediately instantiate the
 381  *                related buffer.  The data is assumed to be all-zeros.  It
 382  *                is primarily used for indirect blocks.
 383  *
 384  * MODIFIED     - The chain's media data has been modified.  Prevents chain
 385  *                free on lastdrop if still in the topology.
 386  *
 387  * UPDATE       - Chain might not be modified but parent blocktable needs
 388  *                an update.  Prevents chain free on lastdrop if still in
 389  *                the topology.
 390  *
 391  * BLKMAPPED    - Indicates that the chain is present in the parent blockmap.
 392  *
 393  * BLKMAPUPD    - Indicates that the chain is present but needs to be updated
 394  *                in the parent blockmap.
 395  */
 396 #define HAMMER2_CHAIN_MODIFIED          0x00000001      /* dirty chain data */
 397 #define HAMMER2_CHAIN_ALLOCATED         0x00000002      /* kmalloc'd chain */
 398 #define HAMMER2_CHAIN_DESTROY           0x00000004
 399 #define HAMMER2_CHAIN_DEDUPABLE         0x00000008      /* registered w/dedup */
 400 #define HAMMER2_CHAIN_DELETED           0x00000010      /* deleted chain */
 401 #define HAMMER2_CHAIN_INITIAL           0x00000020      /* initial create */
 402 #define HAMMER2_CHAIN_UPDATE            0x00000040      /* need parent update */
 403 #define HAMMER2_CHAIN_NOTTESTED         0x00000080      /* crc not generated */
 404 #define HAMMER2_CHAIN_TESTEDGOOD        0x00000100      /* crc tested good */
 405 #define HAMMER2_CHAIN_ONFLUSH           0x00000200      /* on a flush list */
 406 #define HAMMER2_CHAIN_UNUSED0400        0x00000400
 407 #define HAMMER2_CHAIN_VOLUMESYNC        0x00000800      /* needs volume sync */
 408 #define HAMMER2_CHAIN_UNUSED1000        0x00001000
 409 #define HAMMER2_CHAIN_COUNTEDBREFS      0x00002000      /* block table stats */
 410 #define HAMMER2_CHAIN_ONRBTREE          0x00004000      /* on parent RB tree */
 411 #define HAMMER2_CHAIN_ONLRU             0x00008000      /* on LRU list */
 412 #define HAMMER2_CHAIN_UNUSED10000       0x00010000
 413 #define HAMMER2_CHAIN_RELEASE           0x00020000      /* don't keep around */
 414 #define HAMMER2_CHAIN_BLKMAPPED         0x00040000      /* present in blkmap */
 415 #define HAMMER2_CHAIN_BLKMAPUPD         0x00080000      /* +needs updating */
 416 #define HAMMER2_CHAIN_IOINPROG          0x00100000      /* I/O interlock */
 417 #define HAMMER2_CHAIN_IOSIGNAL          0x00200000      /* I/O interlock */
 418 #define HAMMER2_CHAIN_PFSBOUNDARY       0x00400000      /* super->pfs inode */
 419 #define HAMMER2_CHAIN_HINT_LEAF_COUNT   0x00800000      /* redo leaf count */
 420 #define HAMMER2_CHAIN_LRUHINT           0x01000000      /* was reused */
 421
 422 #define HAMMER2_CHAIN_FLUSH_MASK        (HAMMER2_CHAIN_MODIFIED |       \
 423                                          HAMMER2_CHAIN_UPDATE |         \
 424                                          HAMMER2_CHAIN_ONFLUSH |        \
 425                                          HAMMER2_CHAIN_DESTROY)
 426
 427 /*
 428  * Hammer2 error codes, used by chain->error and cluster->error.  The error
 429  * code is typically set on-lock unless no I/O was requested, and set on
 430  * I/O otherwise.  If set for a cluster it generally means that the cluster
 431  * code could not find a valid copy to present.
 432  *
 433  * All H2 error codes are flags and can be accumulated by ORing them
 434  * together.
 435  *
 436  * IO           - An I/O error occurred
 437  * CHECK        - I/O succeeded but did not match the check code
 438  * INCOMPLETE   - A cluster is not complete enough to use, or
 439  *                a chain cannot be loaded because its parent has an error.
 440  *
 441  * NOTE: API allows callers to check zero/non-zero to determine if an error
 442  *       condition exists.
 443  *
 444  * NOTE: Chain's data field is usually NULL on an IO error but not necessarily
 445  *       NULL on other errors.  Check chain->error, not chain->data.
 446  */
 447 #define HAMMER2_ERROR_NONE              0       /* no error (must be 0) */
 448 #define HAMMER2_ERROR_EIO               0x00000001      /* device I/O error */
 449 #define HAMMER2_ERROR_CHECK             0x00000002      /* check code error */
 450 #define HAMMER2_ERROR_INCOMPLETE        0x00000004      /* incomplete cluster */
 451 #define HAMMER2_ERROR_DEPTH             0x00000008      /* tmp depth limit */
 452 #define HAMMER2_ERROR_BADBREF           0x00000010      /* illegal bref */
 453 #define HAMMER2_ERROR_ENOSPC            0x00000020      /* allocation failure */
 454 #define HAMMER2_ERROR_ENOENT            0x00000040      /* entry not found */
 455 #define HAMMER2_ERROR_ENOTEMPTY         0x00000080      /* dir not empty */
 456 #define HAMMER2_ERROR_EAGAIN            0x00000100      /* retry */
 457 #define HAMMER2_ERROR_ENOTDIR           0x00000200      /* not directory */
 458 #define HAMMER2_ERROR_EISDIR            0x00000400      /* is directory */
 459 #define HAMMER2_ERROR_EINPROGRESS       0x00000800      /* already running */
 460 #define HAMMER2_ERROR_ABORTED           0x00001000      /* aborted operation */
 461 #define HAMMER2_ERROR_EOF               0x00002000      /* end of scan */
 462 #define HAMMER2_ERROR_EINVAL            0x00004000      /* catch-all */
 463 #define HAMMER2_ERROR_EEXIST            0x00008000      /* entry exists */
 464 #define HAMMER2_ERROR_EDEADLK           0x00010000
 465 #define HAMMER2_ERROR_ESRCH             0x00020000
 466 #define HAMMER2_ERROR_ETIMEDOUT         0x00040000
 467
 468 /*
 469  * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
 470  *
 471  * NOTES:
 472  *      NODATA      - Asks that the chain->data not be resolved in order
 473  *                    to avoid I/O.
 474  *
 475  *      NODIRECT    - Prevents a lookup of offset 0 in an inode from returning
 476  *                    the inode itself if the inode is in DIRECTDATA mode
 477  *                    (i.e. file is <= 512 bytes).  Used by the synchronization
 478  *                    code to prevent confusion.
 479  *
 480  *      SHARED      - The input chain is expected to be locked shared,
 481  *                    and the output chain is locked shared.
 482  *
 483  *      MATCHIND    - Allows an indirect block / freemap node to be returned
 484  *                    when the passed key range matches the radix.  Remember
 485  *                    that key_end is inclusive (e.g. {0x000,0xFFF},
 486  *                    not {0x000,0x1000}).
 487  *
 488  *                    (Cannot be used for remote or cluster ops).
 489  *
 490  *      ALWAYS      - Always resolve the data.  If ALWAYS and NODATA are both
 491  *                    missing, bulk file data is not resolved but inodes and
 492  *                    other meta-data will.
 493  */
 494 #define HAMMER2_LOOKUP_UNUSED0001       0x00000001
 495 #define HAMMER2_LOOKUP_NODATA           0x00000002      /* data left NULL */
 496 #define HAMMER2_LOOKUP_NODIRECT         0x00000004      /* no offset=0 DD */
 497 #define HAMMER2_LOOKUP_SHARED           0x00000100
 498 #define HAMMER2_LOOKUP_MATCHIND         0x00000200      /* return all chains */
 499 #define HAMMER2_LOOKUP_UNUSED0400       0x00000400
 500 #define HAMMER2_LOOKUP_ALWAYS           0x00000800      /* resolve data */
 501 #define HAMMER2_LOOKUP_UNUSED1000       0x00001000
 502
 503 /*
 504  * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
 505  *
 506  * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
 507  *       blocks in the INITIAL-create state.
 508  */
 509 #define HAMMER2_MODIFY_OPTDATA          0x00000002      /* data can be NULL */
 510
 511 /*
 512  * Flags passed to hammer2_chain_lock()
 513  *
 514  * NOTE: NONBLOCK is only used for hammer2_chain_repparent() and getparent(),
 515  *       other functions (e.g. hammer2_chain_lookup(), etc) can't handle its
 516  *       operation.
 517  */
 518 #define HAMMER2_RESOLVE_NEVER           1
 519 #define HAMMER2_RESOLVE_MAYBE           2
 520 #define HAMMER2_RESOLVE_ALWAYS          3
 521 #define HAMMER2_RESOLVE_MASK            0x0F
 522
 523 #define HAMMER2_RESOLVE_SHARED          0x10    /* request shared lock */
 524 #define HAMMER2_RESOLVE_LOCKAGAIN       0x20    /* another shared lock */
 525 #define HAMMER2_RESOLVE_UNUSED40        0x40
 526 #define HAMMER2_RESOLVE_NONBLOCK        0x80    /* non-blocking */
 527
 528 /*
 529  * Flags passed to hammer2_chain_delete()
 530  */
 531 #define HAMMER2_DELETE_PERMANENT        0x0001
 532
 533 /*
 534  * Flags passed to hammer2_chain_insert() or hammer2_chain_rename()
 535  * or hammer2_chain_create().
 536  */
 537 #define HAMMER2_INSERT_PFSROOT          0x0004
 538 #define HAMMER2_INSERT_SAMEPARENT       0x0008
 539
 540 /*
 541  * hammer2_freemap_adjust()
 542  */
 543 #define HAMMER2_FREEMAP_DORECOVER       1
 544 #if 0
 545 #define HAMMER2_FREEMAP_DOMAYFREE       2
 546 #define HAMMER2_FREEMAP_DOREALFREE      3
 547 #endif
 548
 549 /*
 550  * HAMMER2 cluster - A set of chains representing the same entity.
 551  *
 552  * hammer2_cluster typically represents a temporary set of representitive
 553  * chains.  The one exception is that a hammer2_cluster is embedded in
 554  * hammer2_inode.  This embedded cluster is ONLY used to track the
 555  * representitive chains and cannot be directly locked.
 556  *
 557  * A cluster is usually temporary (and thus per-thread) for locking purposes,
 558  * allowing us to embed the asynchronous storage required for cluster
 559  * operations in the cluster itself and adjust the state and status without
 560  * having to worry too much about SMP issues.
 561  *
 562  * The exception is the cluster embedded in the hammer2_inode structure.
 563  * This is used to cache the cluster state on an inode-by-inode basis.
 564  * Individual hammer2_chain structures not incorporated into clusters might
 565  * also stick around to cache miscellanious elements.
 566  *
 567  * Because the cluster is a 'working copy' and is usually subject to cluster
 568  * quorum rules, it is quite possible for us to end up with an insufficient
 569  * number of live chains to execute an operation.  If an insufficient number
 570  * of chains remain in a working copy, the operation may have to be
 571  * downgraded, retried, stall until the requisit number of chains are
 572  * available, or possibly even error out depending on the mount type.
 573  *
 574  * A cluster's focus is set when it is locked.  The focus can only be set
 575  * to a chain still part of the synchronized set.
 576  */
 577 #define HAMMER2_XOPFIFO         16
 578 #define HAMMER2_XOPFIFO_MASK    (HAMMER2_XOPFIFO - 1)
 579 #define HAMMER2_XOPTHREADS_MIN  32
 580 #define HAMMER2_XOPGROUPS_MIN   4
 581
 582 #define HAMMER2_MAXCLUSTER      8
 583 #define HAMMER2_XOPMASK_CLUSTER ((uint64_t)((1LLU << HAMMER2_MAXCLUSTER) - 1))
 584 #define HAMMER2_XOPMASK_VOP     ((uint64_t)0x0000000080000000LLU)
 585 #define HAMMER2_XOPMASK_FIFOW   ((uint64_t)0x0000000040000000LLU)
 586 #define HAMMER2_XOPMASK_WAIT    ((uint64_t)0x0000000020000000LLU)
 587 #define HAMMER2_XOPMASK_FEED    ((uint64_t)0x0000000100000000LLU)
 588
 589 #define HAMMER2_XOPMASK_ALLDONE (HAMMER2_XOPMASK_VOP | HAMMER2_XOPMASK_CLUSTER)
 590
 591 struct hammer2_cluster_item {
 592         hammer2_chain_t         *chain;
 593         int                     error;
 594         uint32_t                flags;
 595 };
 596
 597 typedef struct hammer2_cluster_item hammer2_cluster_item_t;
 598
 599 /*
 600  * INVALID      - Invalid for focus, i.e. not part of synchronized set.
 601  *                Once set, this bit is sticky across operations.
 602  *
 603  * FEMOD        - Indicates that front-end modifying operations can
 604  *                mess with this entry and MODSYNC will copy also
 605  *                effect it.
 606  */
 607 #define HAMMER2_CITEM_INVALID   0x00000001
 608 #define HAMMER2_CITEM_FEMOD     0x00000002
 609 #define HAMMER2_CITEM_NULL      0x00000004
 610
 611 struct hammer2_cluster {
 612         int                     refs;           /* track for deallocation */
 613         int                     ddflag;
 614         struct hammer2_pfs      *pmp;
 615         uint32_t                flags;
 616         int                     nchains;
 617         int                     error;          /* error code valid on lock */
 618         int                     focus_index;
 619         hammer2_chain_t         *focus;         /* current focus (or mod) */
 620         hammer2_cluster_item_t  array[HAMMER2_MAXCLUSTER];
 621 };
 622
 623 typedef struct hammer2_cluster  hammer2_cluster_t;
 624
 625 /*
 626  * WRHARD       - Hard mounts can write fully synchronized
 627  * RDHARD       - Hard mounts can read fully synchronized
 628  * UNHARD       - Unsynchronized masters present
 629  * NOHARD       - No masters visible
 630  * WRSOFT       - Soft mounts can write to at least the SOFT_MASTER
 631  * RDSOFT       - Soft mounts can read from at least a SOFT_SLAVE
 632  * UNSOFT       - Unsynchronized slaves present
 633  * NOSOFT       - No slaves visible
 634  * RDSLAVE      - slaves are accessible (possibly unsynchronized or remote).
 635  * MSYNCED      - All masters are fully synchronized
 636  * SSYNCED      - All known local slaves are fully synchronized to masters
 637  *
 638  * All available masters are always incorporated.  All PFSs belonging to a
 639  * cluster (master, slave, copy, whatever) always try to synchronize the
 640  * total number of known masters in the PFSs root inode.
 641  *
 642  * A cluster might have access to many slaves, copies, or caches, but we
 643  * have a limited number of cluster slots.  Any such elements which are
 644  * directly mounted from block device(s) will always be incorporated.   Note
 645  * that SSYNCED only applies to such elements which are directly mounted,
 646  * not to any remote slaves, copies, or caches that could be available.  These
 647  * bits are used to monitor and drive our synchronization threads.
 648  *
 649  * When asking the question 'is any data accessible at all', then a simple
 650  * test against (RDHARD|RDSOFT|RDSLAVE) gives you the answer.  If any of
 651  * these bits are set the object can be read with certain caveats:
 652  * RDHARD - no caveats.  RDSOFT - authoritative but might not be synchronized.
 653  * and RDSLAVE - not authoritative, has some data but it could be old or
 654  * incomplete.
 655  *
 656  * When both soft and hard mounts are available, data will be read and written
 657  * via the soft mount only.  But all might be in the cluster because
 658  * background synchronization threads still need to do their work.
 659  */
 660 #define HAMMER2_CLUSTER_INODE   0x00000001      /* embedded in inode struct */
 661 #define HAMMER2_CLUSTER_UNUSED2 0x00000002
 662 #define HAMMER2_CLUSTER_LOCKED  0x00000004      /* cluster lks not recursive */
 663 #define HAMMER2_CLUSTER_WRHARD  0x00000100      /* hard-mount can write */
 664 #define HAMMER2_CLUSTER_RDHARD  0x00000200      /* hard-mount can read */
 665 #define HAMMER2_CLUSTER_UNHARD  0x00000400      /* unsynchronized masters */
 666 #define HAMMER2_CLUSTER_NOHARD  0x00000800      /* no masters visible */
 667 #define HAMMER2_CLUSTER_WRSOFT  0x00001000      /* soft-mount can write */
 668 #define HAMMER2_CLUSTER_RDSOFT  0x00002000      /* soft-mount can read */
 669 #define HAMMER2_CLUSTER_UNSOFT  0x00004000      /* unsynchronized slaves */
 670 #define HAMMER2_CLUSTER_NOSOFT  0x00008000      /* no slaves visible */
 671 #define HAMMER2_CLUSTER_MSYNCED 0x00010000      /* all masters synchronized */
 672 #define HAMMER2_CLUSTER_SSYNCED 0x00020000      /* known slaves synchronized */
 673
 674 #define HAMMER2_CLUSTER_ANYDATA ( HAMMER2_CLUSTER_RDHARD |      \
 675                                   HAMMER2_CLUSTER_RDSOFT |      \
 676                                   HAMMER2_CLUSTER_RDSLAVE)
 677 #if 0
 678 #define HAMMER2_CLUSTER_RDOK    ( HAMMER2_CLUSTER_RDHARD |      \
 679                                   HAMMER2_CLUSTER_RDSOFT)
 680
 681 #define HAMMER2_CLUSTER_WROK    ( HAMMER2_CLUSTER_WRHARD |      \
 682                                   HAMMER2_CLUSTER_WRSOFT)
 683 #endif
 684 #define HAMMER2_CLUSTER_ZFLAGS  ( HAMMER2_CLUSTER_WRHARD |      \
 685                                   HAMMER2_CLUSTER_RDHARD |      \
 686                                   HAMMER2_CLUSTER_WRSOFT |      \
 687                                   HAMMER2_CLUSTER_RDSOFT |      \
 688                                   HAMMER2_CLUSTER_MSYNCED |     \
 689                                   HAMMER2_CLUSTER_SSYNCED)
 690
 691 RB_HEAD(hammer2_inode_tree, hammer2_inode);     /* ip->rbnode */
 692 TAILQ_HEAD(inoq_head, hammer2_inode);           /* ip->entry */
 693 TAILQ_HEAD(depq_head, hammer2_depend);          /* depend->entry */
 694
 695 struct hammer2_depend {
 696         TAILQ_ENTRY(hammer2_depend) entry;
 697         struct inoq_head        sideq;
 698         long                    count;
 699         int                     pass2;
 700         int                     unused01;
 701 };
 702
 703 typedef struct hammer2_depend hammer2_depend_t;
 704
 705 /*
 706  * A hammer2 inode.
 707  *
 708  * NOTE: The inode-embedded cluster is never used directly for I/O (since
 709  *       it may be shared).  Instead it will be replicated-in and synchronized
 710  *       back out if changed.
 711  */
 712 struct hammer2_inode {
 713         RB_ENTRY(hammer2_inode) rbnode;         /* inumber lookup (HL) */
 714         TAILQ_ENTRY(hammer2_inode) entry;       /* SYNCQ/SIDEQ */
 715         hammer2_depend_t        *depend;        /* non-NULL if SIDEQ */
 716         hammer2_depend_t        depend_static;  /* (in-place allocation) */
 717         hammer2_mtx_t           lock;           /* inode lock */
 718         hammer2_mtx_t           truncate_lock;  /* prevent truncates */
 719         struct hammer2_pfs      *pmp;           /* PFS mount */
 720         struct m_vnode          *vp;
 721         hammer2_spin_t          cluster_spin;   /* update cluster */
 722         hammer2_cluster_t       cluster;
 723         //struct lockf          advlock;
 724         u_int                   flags;
 725         u_int                   refs;           /* +vpref, +flushref */
 726         int                     ihash;          /* xop worker distribution */
 727         uint8_t                 comp_heuristic;
 728         hammer2_inode_meta_t    meta;           /* copy of meta-data */
 729         hammer2_off_t           osize;
 730 };
 731
 732 typedef struct hammer2_inode hammer2_inode_t;
 733
 734 /*
 735  * MODIFIED     - Inode is in a modified state, ip->meta may have changes.
 736  * RESIZED      - Inode truncated (any) or inode extended beyond
 737  *                EMBEDDED_BYTES.
 738  *
 739  * SYNCQ        - Inode is included in the current filesystem sync.  The
 740  *                DELETING and CREATING flags will be acted upon.
 741  *
 742  * SIDEQ        - Inode has likely been disconnected from the vnode topology
 743  *                and so is not visible to the vnode-based filesystem syncer
 744  *                code, but is dirty and must be included in the next
 745  *                filesystem sync.  These inodes are moved to the SYNCQ at
 746  *                the time the sync occurs.
 747  *
 748  *                Inodes are not placed on this queue simply because they have
 749  *                become dirty, if a vnode is attached.
 750  *
 751  * DELETING     - Inode is flagged for deletion during the next filesystem
 752  *                sync.  That is, the inode's chain is currently connected
 753  *                and must be deleting during the current or next fs sync.
 754  *
 755  * CREATING     - Inode is flagged for creation during the next filesystem
 756  *                sync.  That is, the inode's chain topology exists (so
 757  *                kernel buffer flushes can occur), but is currently
 758  *                disconnected and must be inserted during the current or
 759  *                next fs sync.  If the DELETING flag is also set, the
 760  *                topology can be thrown away instead.
 761  *
 762  * If an inode that is already part of the current filesystem sync is
 763  * modified by the frontend, including by buffer flushes, the inode lock
 764  * code detects the SYNCQ flag and moves the inode to the head of the
 765  * flush-in-progress, then blocks until the flush has gotten past it.
 766  */
 767 #define HAMMER2_INODE_MODIFIED          0x0001
 768 #define HAMMER2_INODE_UNUSED0002        0x0002
 769 #define HAMMER2_INODE_UNUSED0004        0x0004
 770 #define HAMMER2_INODE_ONRBTREE          0x0008
 771 #define HAMMER2_INODE_RESIZED           0x0010  /* requires inode_chain_sync */
 772 #define HAMMER2_INODE_UNUSED0020        0x0020
 773 #define HAMMER2_INODE_ISUNLINKED        0x0040
 774 #define HAMMER2_INODE_UNUSED0080        0x0080
 775 #define HAMMER2_INODE_SIDEQ             0x0100  /* on side processing queue */
 776 #define HAMMER2_INODE_NOSIDEQ           0x0200  /* disable sideq operation */
 777 #define HAMMER2_INODE_DIRTYDATA         0x0400  /* interlocks inode flush */
 778 #define HAMMER2_INODE_SYNCQ             0x0800  /* sync interlock, sequenced */
 779 #define HAMMER2_INODE_DELETING          0x1000  /* sync interlock, chain topo */
 780 #define HAMMER2_INODE_CREATING          0x2000  /* sync interlock, chain topo */
 781 #define HAMMER2_INODE_SYNCQ_WAKEUP      0x4000  /* sync interlock wakeup */
 782 #define HAMMER2_INODE_SYNCQ_PASS2       0x8000  /* force retry delay */
 783
 784 #define HAMMER2_INODE_DIRTY             (HAMMER2_INODE_MODIFIED |       \
 785                                          HAMMER2_INODE_DIRTYDATA |      \
 786                                          HAMMER2_INODE_DELETING |       \
 787                                          HAMMER2_INODE_CREATING)
 788
 789 int hammer2_inode_cmp(hammer2_inode_t *ip1, hammer2_inode_t *ip2);
 790 RB_PROTOTYPE2(hammer2_inode_tree, hammer2_inode, rbnode, hammer2_inode_cmp,
 791                 hammer2_tid_t);
 792
 793 /*
 794  * Transaction management sub-structure under hammer2_pfs
 795  */
 796 struct hammer2_trans {
 797         uint32_t                flags;
 798         uint32_t                sync_wait;
 799 };
 800
 801 typedef struct hammer2_trans hammer2_trans_t;
 802
 803 #define HAMMER2_TRANS_ISFLUSH           0x80000000      /* flush code */
 804 #define HAMMER2_TRANS_BUFCACHE          0x40000000      /* bio strategy */
 805 #define HAMMER2_TRANS_SIDEQ             0x20000000      /* run sideq */
 806 #define HAMMER2_TRANS_UNUSED10          0x10000000
 807 #define HAMMER2_TRANS_WAITING           0x08000000      /* someone waiting */
 808 #define HAMMER2_TRANS_RESCAN            0x04000000      /* rescan sideq */
 809 #define HAMMER2_TRANS_MASK              0x00FFFFFF      /* count mask */
 810
 811 #define HAMMER2_FREEMAP_HEUR_NRADIX     4       /* pwr 2 PBUFRADIX-LBUFRADIX */
 812 #define HAMMER2_FREEMAP_HEUR_TYPES      8
 813 #define HAMMER2_FREEMAP_HEUR_SIZE       (HAMMER2_FREEMAP_HEUR_NRADIX * \
 814                                          HAMMER2_FREEMAP_HEUR_TYPES)
 815
 816 #define HAMMER2_DEDUP_HEUR_SIZE         (65536 * 4)
 817 #define HAMMER2_DEDUP_HEUR_MASK         (HAMMER2_DEDUP_HEUR_SIZE - 1)
 818
 819 #define HAMMER2_FLUSH_TOP               0x0001
 820 #define HAMMER2_FLUSH_ALL               0x0002
 821 #define HAMMER2_FLUSH_INODE_STOP        0x0004  /* stop at sub-inode */
 822 #define HAMMER2_FLUSH_FSSYNC            0x0008  /* part of filesystem sync */
 823
 824
 825 /*
 826  * Hammer2 support thread element.
 827  *
 828  * Potentially many support threads can hang off of hammer2, primarily
 829  * off the hammer2_pfs structure.  Typically:
 830  *
 831  * td x Nodes                   A synchronization thread for each node.
 832  * td x Nodes x workers         Worker threads for frontend operations.
 833  * td x 1                       Bioq thread for logical buffer writes.
 834  *
 835  * In addition, the synchronization thread(s) associated with the
 836  * super-root PFS (spmp) for a node is responsible for automatic bulkfree
 837  * and dedup scans.
 838  */
 839 struct hammer2_thread {
 840         struct hammer2_pfs *pmp;
 841         struct hammer2_dev *hmp;
 842         hammer2_xop_list_t xopq;
 843         thread_t        td;
 844         uint32_t        flags;
 845         int             clindex;        /* cluster element index */
 846         int             repidx;
 847         char            *scratch;       /* MAXPHYS */
 848 };
 849
 850 typedef struct hammer2_thread hammer2_thread_t;
 851
 852 #define HAMMER2_THREAD_UNMOUNTING       0x0001  /* unmount request */
 853 #define HAMMER2_THREAD_DEV              0x0002  /* related to dev, not pfs */
 854 #define HAMMER2_THREAD_WAITING          0x0004  /* thread in idle tsleep */
 855 #define HAMMER2_THREAD_REMASTER         0x0008  /* remaster request */
 856 #define HAMMER2_THREAD_STOP             0x0010  /* exit request */
 857 #define HAMMER2_THREAD_FREEZE           0x0020  /* force idle */
 858 #define HAMMER2_THREAD_FROZEN           0x0040  /* thread is frozen */
 859 #define HAMMER2_THREAD_XOPQ             0x0080  /* work pending */
 860 #define HAMMER2_THREAD_STOPPED          0x0100  /* thread has stopped */
 861 #define HAMMER2_THREAD_UNFREEZE         0x0200
 862
 863 #define HAMMER2_THREAD_WAKEUP_MASK      (HAMMER2_THREAD_UNMOUNTING |    \
 864                                          HAMMER2_THREAD_REMASTER |      \
 865                                          HAMMER2_THREAD_STOP |          \
 866                                          HAMMER2_THREAD_FREEZE |        \
 867                                          HAMMER2_THREAD_XOPQ)
 868
 869 /*
 870  * Support structure for dedup heuristic.
 871  */
 872 struct hammer2_dedup {
 873         hammer2_off_t   data_off;
 874         uint64_t        data_crc;
 875         uint32_t        ticks;
 876         uint32_t        saved_error;
 877 };
 878
 879 typedef struct hammer2_dedup hammer2_dedup_t;
 880
 881 /*
 882  * hammer2_xop - container for VOP/XOP operation (allocated, not on stack).
 883  *
 884  * This structure is used to distribute a VOP operation across multiple
 885  * nodes.  It provides a rendezvous for concurrent node execution and
 886  * can be detached from the frontend operation to allow the frontend to
 887  * return early.
 888  *
 889  * This structure also sequences operations on up to three inodes.
 890  */
 891 typedef void (*hammer2_xop_func_t)(union hammer2_xop *xop, void *scratch,
 892                                    int clindex);
 893
 894 struct hammer2_xop_desc {
 895         hammer2_xop_func_t      storage_func;   /* local storage function */
 896         hammer2_xop_func_t      dmsg_dispatch;  /* dmsg dispatch function */
 897         hammer2_xop_func_t      dmsg_process;   /* dmsg processing function */
 898         const char              *id;
 899 };
 900
 901 typedef struct hammer2_xop_desc hammer2_xop_desc_t;
 902
 903 struct hammer2_xop_fifo {
 904         TAILQ_ENTRY(hammer2_xop_head) entry;
 905         hammer2_chain_t         *array[HAMMER2_XOPFIFO];
 906         int                     errors[HAMMER2_XOPFIFO];
 907         int                     ri;
 908         int                     wi;
 909         int                     flags;
 910         hammer2_thread_t        *thr;
 911 };
 912
 913 typedef struct hammer2_xop_fifo hammer2_xop_fifo_t;
 914
 915 #define HAMMER2_XOP_FIFO_RUN    0x0001
 916 #define HAMMER2_XOP_FIFO_STALL  0x0002
 917
 918 struct hammer2_xop_head {
 919         hammer2_xop_desc_t      *desc;
 920         hammer2_tid_t           mtid;
 921         struct hammer2_inode    *ip1;
 922         struct hammer2_inode    *ip2;
 923         struct hammer2_inode    *ip3;
 924         struct hammer2_inode    *ip4;
 925         uint64_t                run_mask;
 926         uint64_t                chk_mask;
 927         int                     flags;
 928         int                     state;
 929         int                     error;
 930         hammer2_key_t           collect_key;
 931         char                    *name1;
 932         size_t                  name1_len;
 933         char                    *name2;
 934         size_t                  name2_len;
 935         hammer2_xop_fifo_t      collect[HAMMER2_MAXCLUSTER];
 936         hammer2_cluster_t       cluster;        /* help collections */
 937         hammer2_io_t            *focus_dio;
 938 };
 939
 940 typedef struct hammer2_xop_head hammer2_xop_head_t;
 941
 942 struct hammer2_xop_ipcluster {
 943         hammer2_xop_head_t      head;
 944 };
 945
 946 struct hammer2_xop_strategy {
 947         hammer2_xop_head_t      head;
 948         hammer2_key_t           lbase;
 949         int                     finished;
 950         hammer2_mtx_t           lock;
 951         struct bio              *bio;
 952 };
 953
 954 struct hammer2_xop_readdir {
 955         hammer2_xop_head_t      head;
 956         hammer2_key_t           lkey;
 957 };
 958
 959 struct hammer2_xop_nresolve {
 960         hammer2_xop_head_t      head;
 961         hammer2_key_t           lhc;    /* if name is NULL used lhc */
 962 };
 963
 964 struct hammer2_xop_unlink {
 965         hammer2_xop_head_t      head;
 966         int                     isdir;
 967         int                     dopermanent;
 968 };
 969
 970 #define H2DOPERM_PERMANENT      0x01
 971 #define H2DOPERM_FORCE          0x02
 972 #define H2DOPERM_IGNINO         0x04
 973
 974 struct hammer2_xop_nrename {
 975         hammer2_xop_head_t      head;
 976         hammer2_tid_t           lhc;
 977         int                     ip_key;
 978 };
 979
 980 struct hammer2_xop_scanlhc {
 981         hammer2_xop_head_t      head;
 982         hammer2_key_t           lhc;
 983 };
 984
 985 struct hammer2_xop_scanall {
 986         hammer2_xop_head_t      head;
 987         hammer2_key_t           key_beg;        /* inclusive */
 988         hammer2_key_t           key_end;        /* inclusive */
 989         int                     resolve_flags;
 990         int                     lookup_flags;
 991 };
 992
 993 struct hammer2_xop_lookup {
 994         hammer2_xop_head_t      head;
 995         hammer2_key_t           lhc;
 996 };
 997
 998 struct hammer2_xop_mkdirent {
 999         hammer2_xop_head_t      head;
1000         hammer2_dirent_head_t   dirent;
1001         hammer2_key_t           lhc;
1002 };
1003
1004 struct hammer2_xop_create {
1005         hammer2_xop_head_t      head;
1006         hammer2_inode_meta_t    meta;           /* initial metadata */
1007         hammer2_key_t           lhc;
1008         int                     flags;
1009 };
1010
1011 struct hammer2_xop_destroy {
1012         hammer2_xop_head_t      head;
1013 };
1014
1015 struct hammer2_xop_fsync {
1016         hammer2_xop_head_t      head;
1017         hammer2_inode_meta_t    meta;
1018         hammer2_off_t           osize;
1019         u_int                   ipflags;
1020         int                     clear_directdata;
1021 };
1022
1023 struct hammer2_xop_unlinkall {
1024         hammer2_xop_head_t      head;
1025         hammer2_key_t           key_beg;
1026         hammer2_key_t           key_end;
1027 };
1028
1029 struct hammer2_xop_connect {
1030         hammer2_xop_head_t      head;
1031         hammer2_key_t           lhc;
1032 };
1033
1034 struct hammer2_xop_flush {
1035         hammer2_xop_head_t      head;
1036 };
1037
1038 typedef struct hammer2_xop_readdir hammer2_xop_readdir_t;
1039 typedef struct hammer2_xop_nresolve hammer2_xop_nresolve_t;
1040 typedef struct hammer2_xop_unlink hammer2_xop_unlink_t;
1041 typedef struct hammer2_xop_nrename hammer2_xop_nrename_t;
1042 typedef struct hammer2_xop_ipcluster hammer2_xop_ipcluster_t;
1043 typedef struct hammer2_xop_strategy hammer2_xop_strategy_t;
1044 typedef struct hammer2_xop_mkdirent hammer2_xop_mkdirent_t;
1045 typedef struct hammer2_xop_create hammer2_xop_create_t;
1046 typedef struct hammer2_xop_destroy hammer2_xop_destroy_t;
1047 typedef struct hammer2_xop_fsync hammer2_xop_fsync_t;
1048 typedef struct hammer2_xop_unlinkall hammer2_xop_unlinkall_t;
1049 typedef struct hammer2_xop_scanlhc hammer2_xop_scanlhc_t;
1050 typedef struct hammer2_xop_scanall hammer2_xop_scanall_t;
1051 typedef struct hammer2_xop_lookup hammer2_xop_lookup_t;
1052 typedef struct hammer2_xop_connect hammer2_xop_connect_t;
1053 typedef struct hammer2_xop_flush hammer2_xop_flush_t;
1054
1055 union hammer2_xop {
1056         hammer2_xop_head_t      head;
1057         hammer2_xop_ipcluster_t xop_ipcluster;
1058         hammer2_xop_readdir_t   xop_readdir;
1059         hammer2_xop_nresolve_t  xop_nresolve;
1060         hammer2_xop_unlink_t    xop_unlink;
1061         hammer2_xop_nrename_t   xop_nrename;
1062         hammer2_xop_strategy_t  xop_strategy;
1063         hammer2_xop_mkdirent_t  xop_mkdirent;
1064         hammer2_xop_create_t    xop_create;
1065         hammer2_xop_destroy_t   xop_destroy;
1066         hammer2_xop_fsync_t     xop_fsync;
1067         hammer2_xop_unlinkall_t xop_unlinkall;
1068         hammer2_xop_scanlhc_t   xop_scanlhc;
1069         hammer2_xop_scanall_t   xop_scanall;
1070         hammer2_xop_lookup_t    xop_lookup;
1071         hammer2_xop_flush_t     xop_flush;
1072         hammer2_xop_connect_t   xop_connect;
1073 };
1074
1075 typedef union hammer2_xop hammer2_xop_t;
1076
1077 /*
1078  * hammer2_xop_group - Manage XOP support threads.
1079  */
1080 struct hammer2_xop_group {
1081         hammer2_thread_t        thrs[HAMMER2_MAXCLUSTER];
1082 };
1083
1084 typedef struct hammer2_xop_group hammer2_xop_group_t;
1085
1086 /*
1087  * flags to hammer2_xop_collect()
1088  */
1089 #define HAMMER2_XOP_COLLECT_NOWAIT      0x00000001
1090 #define HAMMER2_XOP_COLLECT_WAITALL     0x00000002
1091
1092 /*
1093  * flags to hammer2_xop_alloc()
1094  *
1095  * MODIFYING    - This is a modifying transaction, allocate a mtid.
1096  */
1097 #define HAMMER2_XOP_MODIFYING           0x00000001
1098 #define HAMMER2_XOP_STRATEGY            0x00000002
1099 #define HAMMER2_XOP_INODE_STOP          0x00000004
1100 #define HAMMER2_XOP_VOLHDR              0x00000008
1101 #define HAMMER2_XOP_FSSYNC              0x00000010
1102
1103 /*
1104  * Device vnode management structure
1105  */
1106 struct hammer2_devvp {
1107         TAILQ_ENTRY(hammer2_devvp) entry;
1108         struct m_vnode  *devvp;         /* device vnode */
1109         char            *path;          /* device vnode path */
1110         int             open;           /* 1 if devvp open */
1111 };
1112
1113 typedef struct hammer2_devvp hammer2_devvp_t;
1114
1115 TAILQ_HEAD(hammer2_devvp_list, hammer2_devvp);
1116
1117 typedef struct hammer2_devvp_list hammer2_devvp_list_t;
1118
1119 /*
1120  * Volume management structure
1121  */
1122 struct hammer2_vfsvolume {
1123         hammer2_devvp_t *dev;           /* device vnode management */
1124         int             id;             /* volume id */
1125         hammer2_off_t   offset;         /* offset within volumes */
1126         hammer2_off_t   size;           /* volume size */
1127 };
1128
1129 typedef struct hammer2_vfsvolume hammer2_vfsvolume_t;
1130
1131 /*
1132  * Global (per partition) management structure, represents a hard block
1133  * device.  Typically referenced by hammer2_chain structures when applicable.
1134  * Typically not used for network-managed elements.
1135  *
1136  * Note that a single hammer2_dev can be indirectly tied to multiple system
1137  * mount points.  There is no direct relationship.  System mounts are
1138  * per-cluster-id, not per-block-device, and a single hard mount might contain
1139  * many PFSs and those PFSs might combine together in various ways to form
1140  * the set of available clusters.
1141  */
1142 struct hammer2_dev {
1143         struct m_vnode  *devvp;         /* device vnode for root volume */
1144         int             ronly;          /* read-only mount */
1145         int             mount_count;    /* number of actively mounted PFSs */
1146         TAILQ_ENTRY(hammer2_dev) mntentry; /* hammer2_mntlist */
1147
1148         struct malloc_type *mchain_obj;
1149         struct malloc_type *mio_obj;
1150         struct malloc_type *mmsg;
1151         //kdmsg_iocom_t iocom;          /* volume-level dmsg interface */
1152         hammer2_spin_t  io_spin;        /* iotree, iolruq access */
1153         struct hammer2_io_tree iotree;
1154         int             iofree_count;
1155         int             freemap_relaxed;
1156         hammer2_chain_t vchain;         /* anchor chain (topology) */
1157         hammer2_chain_t fchain;         /* anchor chain (freemap) */
1158         hammer2_spin_t  list_spin;
1159         struct hammer2_pfs *spmp;       /* super-root pmp for transactions */
1160         struct lock     vollk;          /* lockmgr lock */
1161         struct lock     bulklk;         /* bulkfree operation lock */
1162         struct lock     bflock;         /* bulk-free manual function lock */
1163         hammer2_off_t   heur_freemap[HAMMER2_FREEMAP_HEUR_SIZE];
1164         hammer2_dedup_t heur_dedup[HAMMER2_DEDUP_HEUR_SIZE];
1165         int             volhdrno;       /* last volhdrno written */
1166         uint32_t        hflags;         /* HMNT2 flags applicable to device */
1167         hammer2_off_t   free_reserved;  /* nominal free reserved */
1168         hammer2_off_t   total_size;     /* total size of volumes */
1169         int             nvolumes;       /* total number of volumes */
1170         hammer2_thread_t bfthr;         /* bulk-free thread */
1171         char            devrepname[64]; /* for kprintf */
1172         hammer2_volume_data_t voldata;
1173         hammer2_volume_data_t volsync;  /* synchronized voldata */
1174
1175         hammer2_devvp_list_t devvpl;    /* list of device vnodes including *devvp */
1176         hammer2_vfsvolume_t volumes[HAMMER2_MAX_VOLUMES]; /* list of volumes */
1177 };
1178
1179 typedef struct hammer2_dev hammer2_dev_t;
1180
1181 /*
1182  * Per-cluster management structure.  This structure will be tied to a
1183  * system mount point if the system is mounting the PFS, but is also used
1184  * to manage clusters encountered during the super-root scan or received
1185  * via LNK_SPANs that might not be mounted.
1186  *
1187  * This structure is also used to represent the super-root that hangs off
1188  * of a hard mount point.  The super-root is not really a cluster element.
1189  * In this case the spmp_hmp field will be non-NULL.  It's just easier to do
1190  * this than to special case super-root manipulation in the hammer2_chain*
1191  * code as being only hammer2_dev-related.
1192  *
1193  * pfs_mode and pfs_nmasters are rollup fields which critically describes
1194  * how elements of the cluster act on the cluster.  pfs_mode is only applicable
1195  * when a PFS is mounted by the system.  pfs_nmasters is our best guess as to
1196  * how many masters have been configured for a cluster and is always
1197  * applicable.  pfs_types[] is an array with 1:1 correspondance to the
1198  * iroot cluster and describes the PFS types of the nodes making up the
1199  * cluster.
1200  *
1201  * WARNING! Portions of this structure have deferred initialization.  In
1202  *          particular, if not mounted there will be no wthread.
1203  *          umounted network PFSs will also be missing iroot and numerous
1204  *          other fields will not be initialized prior to mount.
1205  *
1206  *          Synchronization threads are chain-specific and only applicable
1207  *          to local hard PFS entries.  A hammer2_pfs structure may contain
1208  *          more than one when multiple hard PFSs are present on the local
1209  *          machine which require synchronization monitoring.  Most PFSs
1210  *          (such as snapshots) are 1xMASTER PFSs which do not need a
1211  *          synchronization thread.
1212  *
1213  * WARNING! The chains making up pfs->iroot's cluster are accounted for in
1214  *          hammer2_dev->mount_count when the pfs is associated with a mount
1215  *          point.
1216  */
1217 struct hammer2_pfs {
1218         struct mount            *mp;
1219         TAILQ_ENTRY(hammer2_pfs) mntentry;      /* hammer2_pfslist */
1220         uuid_t                  pfs_clid;
1221         hammer2_dev_t           *spmp_hmp;      /* only if super-root pmp */
1222         hammer2_dev_t           *force_local;   /* only if 'local' mount */
1223         hammer2_inode_t         *iroot;         /* PFS root inode */
1224         uint8_t                 pfs_types[HAMMER2_MAXCLUSTER];
1225         char                    *pfs_names[HAMMER2_MAXCLUSTER];
1226         hammer2_dev_t           *pfs_hmps[HAMMER2_MAXCLUSTER];
1227         hammer2_blockset_t      pfs_iroot_blocksets[HAMMER2_MAXCLUSTER];
1228         hammer2_trans_t         trans;
1229         struct lock             lock;           /* PFS lock for certain ops */
1230         //struct netexport      export;         /* nfs export */
1231         int                     unused00;
1232         int                     ronly;          /* read-only mount */
1233         int                     hflags;         /* pfs-specific mount flags */
1234         struct malloc_type      *minode_obj;
1235         hammer2_spin_t          inum_spin;      /* inumber lookup */
1236         struct hammer2_inode_tree inum_tree;    /* (not applicable to spmp) */
1237         long                    inum_count;     /* #of inodes in inum_tree */
1238         hammer2_spin_t          lru_spin;
1239         struct hammer2_chain_list lru_list;     /* basis for LRU tests */
1240         int                     lru_count;      /* #of chains on LRU */
1241         int                     flags;
1242         hammer2_tid_t           modify_tid;     /* modify transaction id */
1243         hammer2_tid_t           inode_tid;      /* inode allocator */
1244         uint8_t                 pfs_nmasters;   /* total masters */
1245         uint8_t                 pfs_mode;       /* operating mode PFSMODE */
1246         uint8_t                 unused01;
1247         uint8_t                 unused02;
1248         int                     free_ticks;     /* free_* calculations */
1249         long                    inmem_inodes;
1250         hammer2_off_t           free_reserved;
1251         hammer2_off_t           free_nominal;
1252         uint32_t                inmem_dirty_chains;
1253         int                     count_lwinprog; /* logical write in prog */
1254         hammer2_spin_t          list_spin;
1255         struct inoq_head        syncq;          /* SYNCQ flagged inodes */
1256         struct depq_head        depq;           /* SIDEQ flagged inodes */
1257         long                    sideq_count;    /* total inodes on depq */
1258         hammer2_thread_t        sync_thrs[HAMMER2_MAXCLUSTER];
1259         uint32_t                cluster_flags;  /* cached cluster flags */
1260         int                     has_xop_threads;
1261         hammer2_spin_t          xop_spin;       /* xop sequencer */
1262         hammer2_xop_group_t     *xop_groups;
1263 };
1264
1265 typedef struct hammer2_pfs hammer2_pfs_t;
1266
1267 TAILQ_HEAD(hammer2_pfslist, hammer2_pfs);
1268
1269 /*
1270  * pmp->flags
1271  */
1272 #define HAMMER2_PMPF_SPMP       0x00000001
1273 #define HAMMER2_PMPF_EMERG      0x00000002      /* Emergency delete mode */
1274
1275 /*
1276  * NOTE: The LRU list contains at least all the chains with refs == 0
1277  *       that can be recycled, and may contain additional chains which
1278  *       cannot.
1279  */
1280 #define HAMMER2_LRU_LIMIT               4096
1281
1282 #define HAMMER2_DIRTYCHAIN_WAITING      0x80000000
1283 #define HAMMER2_DIRTYCHAIN_MASK         0x7FFFFFFF
1284
1285 #define HAMMER2_LWINPROG_WAITING        0x80000000
1286 #define HAMMER2_LWINPROG_WAITING0       0x40000000
1287 #define HAMMER2_LWINPROG_MASK           0x3FFFFFFF
1288
1289 /*
1290  * hammer2_cluster_check
1291  */
1292 #define HAMMER2_CHECK_NULL      0x00000001
1293
1294 /*
1295  * Misc
1296  */
1297 //#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
1298 #define VTOI(vp)        ((hammer2_inode_t *)(vp)->v_data)
1299 //#endif
1300
1301 //#if defined(_KERNEL)
1302
1303 #ifdef MALLOC_DECLARE
1304 MALLOC_DECLARE(M_HAMMER2);
1305 #endif
1306
1307 static __inline
1308 hammer2_pfs_t *
1309 MPTOPMP(struct mount *mp)
1310 {
1311         return ((hammer2_pfs_t *)mp->mnt_data);
1312 }
1313
1314 #define HAMMER2_DEDUP_FRAG      (HAMMER2_PBUFSIZE / 64)
1315 #define HAMMER2_DEDUP_FRAGRADIX (HAMMER2_PBUFRADIX - 6)
1316
1317 static __inline
1318 uint64_t
1319 hammer2_dedup_mask(hammer2_io_t *dio, hammer2_off_t data_off, u_int bytes)
1320 {
1321         int bbeg;
1322         int bits;
1323         uint64_t mask;
1324
1325         bbeg = (int)((data_off & ~HAMMER2_OFF_MASK_RADIX) - dio->pbase) >>
1326                HAMMER2_DEDUP_FRAGRADIX;
1327         bits = (int)((bytes + (HAMMER2_DEDUP_FRAG - 1)) >>
1328                HAMMER2_DEDUP_FRAGRADIX);
1329         if (bbeg + bits == 64)
1330                 mask = (uint64_t)-1;
1331         else
1332                 mask = ((uint64_t)1 << (bbeg + bits)) - 1;
1333
1334         mask &= ~(((uint64_t)1 << bbeg) - 1);
1335
1336         return mask;
1337 }
1338
1339 static __inline
1340 int
1341 hammer2_error_to_errno(int error)
1342 {
1343         if (error) {
1344                 if (error & HAMMER2_ERROR_EIO)
1345                         error = EIO;
1346                 else if (error & HAMMER2_ERROR_CHECK)
1347                         error = EDOM;
1348                 else if (error & HAMMER2_ERROR_ABORTED)
1349                         error = EINTR;
1350                 else if (error & HAMMER2_ERROR_BADBREF)
1351                         error = EIO;
1352                 else if (error & HAMMER2_ERROR_ENOSPC)
1353                         error = ENOSPC;
1354                 else if (error & HAMMER2_ERROR_ENOENT)
1355                         error = ENOENT;
1356                 else if (error & HAMMER2_ERROR_ENOTEMPTY)
1357                         error = ENOTEMPTY;
1358                 else if (error & HAMMER2_ERROR_EAGAIN)
1359                         error = EAGAIN;
1360                 else if (error & HAMMER2_ERROR_ENOTDIR)
1361                         error = ENOTDIR;
1362                 else if (error & HAMMER2_ERROR_EISDIR)
1363                         error = EISDIR;
1364                 else if (error & HAMMER2_ERROR_EINPROGRESS)
1365                         error = EINPROGRESS;
1366                 else if (error & HAMMER2_ERROR_EEXIST)
1367                         error = EEXIST;
1368                 else if (error & HAMMER2_ERROR_EINVAL)
1369                         error = EINVAL;
1370                 else if (error & HAMMER2_ERROR_EDEADLK)
1371                         error = EDEADLK;
1372                 else if (error & HAMMER2_ERROR_ESRCH)
1373                         error = ESRCH;
1374                 else if (error & HAMMER2_ERROR_ETIMEDOUT)
1375                         error = ETIMEDOUT;
1376                 else
1377                         error = EDOM;
1378         }
1379         return error;
1380 }
1381
1382 static __inline
1383 int
1384 hammer2_errno_to_error(int error)
1385 {
1386         switch(error) {
1387         case 0:
1388                 return 0;
1389         case EIO:
1390                 return HAMMER2_ERROR_EIO;
1391         case EDOM:
1392                 return HAMMER2_ERROR_CHECK;
1393         case EINTR:
1394                 return HAMMER2_ERROR_ABORTED;
1395         //case EIO:
1396         //      return HAMMER2_ERROR_BADBREF;
1397         case ENOSPC:
1398                 return HAMMER2_ERROR_ENOSPC;
1399         case ENOENT:
1400                 return HAMMER2_ERROR_ENOENT;
1401         case ENOTEMPTY:
1402                 return HAMMER2_ERROR_ENOTEMPTY;
1403         case EAGAIN:
1404                 return HAMMER2_ERROR_EAGAIN;
1405         case ENOTDIR:
1406                 return HAMMER2_ERROR_ENOTDIR;
1407         case EISDIR:
1408                 return HAMMER2_ERROR_EISDIR;
1409         case EINPROGRESS:
1410                 return HAMMER2_ERROR_EINPROGRESS;
1411         case EEXIST:
1412                 return HAMMER2_ERROR_EEXIST;
1413         case EINVAL:
1414                 return HAMMER2_ERROR_EINVAL;
1415         case EDEADLK:
1416                 return HAMMER2_ERROR_EDEADLK;
1417         case ESRCH:
1418                 return HAMMER2_ERROR_ESRCH;
1419         case ETIMEDOUT:
1420                 return HAMMER2_ERROR_ETIMEDOUT;
1421         default:
1422                 return HAMMER2_ERROR_EINVAL;
1423         }
1424 }
1425
1426
1427 extern struct vop_ops hammer2_vnode_vops;
1428 extern struct vop_ops hammer2_spec_vops;
1429 extern struct vop_ops hammer2_fifo_vops;
1430 extern struct hammer2_pfslist hammer2_pfslist;
1431 extern struct lock hammer2_mntlk;
1432
1433 extern int hammer2_aux_flags;
1434 extern int hammer2_debug;
1435 extern int hammer2_xop_nthreads;
1436 extern int hammer2_xop_sgroups;
1437 extern int hammer2_xop_xgroups;
1438 extern int hammer2_xop_xbase;
1439 extern int hammer2_xop_mod;
1440 extern long hammer2_debug_inode;
1441 extern int hammer2_cluster_meta_read;
1442 extern int hammer2_cluster_data_read;
1443 extern int hammer2_cluster_write;
1444 extern int hammer2_dedup_enable;
1445 extern int hammer2_always_compress;
1446 extern int hammer2_flush_pipe;
1447 extern int hammer2_dio_count;
1448 extern int hammer2_dio_limit;
1449 extern int hammer2_bulkfree_tps;
1450 extern int hammer2_spread_workers;
1451 extern int hammer2_limit_saved_depth;
1452 extern long hammer2_chain_allocs;
1453 extern long hammer2_limit_saved_chains;
1454 extern long hammer2_limit_dirty_chains;
1455 extern long hammer2_limit_dirty_inodes;
1456 extern long hammer2_count_modified_chains;
1457 extern long hammer2_iod_file_read;
1458 extern long hammer2_iod_meta_read;
1459 extern long hammer2_iod_indr_read;
1460 extern long hammer2_iod_fmap_read;
1461 extern long hammer2_iod_volu_read;
1462 extern long hammer2_iod_file_write;
1463 extern long hammer2_iod_file_wembed;
1464 extern long hammer2_iod_file_wzero;
1465 extern long hammer2_iod_file_wdedup;
1466 extern long hammer2_iod_meta_write;
1467 extern long hammer2_iod_indr_write;
1468 extern long hammer2_iod_fmap_write;
1469 extern long hammer2_iod_volu_write;
1470
1471 extern long hammer2_process_icrc32;
1472 extern long hammer2_process_xxhash64;
1473
1474 extern struct objcache *cache_buffer_read;
1475 extern struct objcache *cache_buffer_write;
1476 extern struct objcache *cache_xops;
1477
1478 /*
1479  * hammer2_subr.c
1480  */
1481 #define hammer2_icrc32(buf, size)       iscsi_crc32((buf), (size))
1482 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
1483
1484 int hammer2_signal_check(time_t *timep);
1485 const char *hammer2_error_str(int error);
1486 const char *hammer2_bref_type_str(int btype);
1487
1488 int hammer2_get_dtype(uint8_t type);
1489 int hammer2_get_vtype(uint8_t type);
1490 uint8_t hammer2_get_obj_type(enum vtype vtype);
1491 void hammer2_time_to_timespec(uint64_t xtime, struct timespec *ts);
1492 uint64_t hammer2_timespec_to_time(const struct timespec *ts);
1493 uint32_t hammer2_to_unix_xid(const uuid_t *uuid);
1494 void hammer2_guid_to_uuid(uuid_t *uuid, uint32_t guid);
1495
1496 hammer2_key_t hammer2_dirhash(const char *aname, size_t len);
1497 int hammer2_getradix(size_t bytes);
1498
1499 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
1500                         hammer2_key_t *lbasep, hammer2_key_t *leofp);
1501 int hammer2_calc_physical(hammer2_inode_t *ip, hammer2_key_t lbase);
1502 void hammer2_update_time(uint64_t *timep, bool is_mtime);
1503 void hammer2_adjreadcounter(int btype, size_t bytes);
1504 void hammer2_adjwritecounter(int btype, size_t bytes);
1505
1506 /*
1507  * hammer2_inode.c
1508  */
1509 struct m_vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
1510 hammer2_inode_t *hammer2_inode_lookup(hammer2_pfs_t *pmp,
1511                         hammer2_tid_t inum);
1512 hammer2_inode_t *hammer2_inode_get(hammer2_pfs_t *pmp,
1513                         hammer2_xop_head_t *xop, hammer2_tid_t inum, int idx);
1514 void hammer2_inode_ref(hammer2_inode_t *ip);
1515 void hammer2_inode_drop(hammer2_inode_t *ip);
1516 void hammer2_inode_repoint(hammer2_inode_t *ip, hammer2_cluster_t *cluster);
1517 void hammer2_inode_repoint_one(hammer2_inode_t *ip, hammer2_cluster_t *cluster,
1518                         int idx);
1519 hammer2_key_t hammer2_inode_data_count(const hammer2_inode_t *ip);
1520 hammer2_key_t hammer2_inode_inode_count(const hammer2_inode_t *ip);
1521 void hammer2_inode_modify(hammer2_inode_t *ip);
1522 void hammer2_inode_delayed_sideq(hammer2_inode_t *ip);
1523 void hammer2_inode_lock(hammer2_inode_t *ip, int how);
1524 void hammer2_inode_lock4(hammer2_inode_t *ip1, hammer2_inode_t *ip2,
1525                         hammer2_inode_t *ip3, hammer2_inode_t *ip4);
1526 void hammer2_inode_unlock(hammer2_inode_t *ip);
1527 void hammer2_inode_depend(hammer2_inode_t *ip1, hammer2_inode_t *ip2);
1528 hammer2_chain_t *hammer2_inode_chain(hammer2_inode_t *ip, int clindex, int how);
1529 hammer2_chain_t *hammer2_inode_chain_and_parent(hammer2_inode_t *ip,
1530                         int clindex, hammer2_chain_t **parentp, int how);
1531 hammer2_mtx_state_t hammer2_inode_lock_temp_release(hammer2_inode_t *ip);
1532 void hammer2_inode_lock_temp_restore(hammer2_inode_t *ip,
1533                         hammer2_mtx_state_t ostate);
1534 int hammer2_inode_lock_upgrade(hammer2_inode_t *ip);
1535 void hammer2_inode_lock_downgrade(hammer2_inode_t *ip, int);
1536
1537 hammer2_inode_t *hammer2_inode_create_normal(hammer2_inode_t *pip,
1538                         struct vattr *vap, struct ucred *cred,
1539                         hammer2_key_t inum, int *errorp);
1540 hammer2_inode_t *hammer2_inode_create_pfs(hammer2_pfs_t *spmp,
1541                         const char *name, size_t name_len,
1542                         int *errorp);
1543 int hammer2_inode_chain_ins(hammer2_inode_t *ip);
1544 int hammer2_inode_chain_des(hammer2_inode_t *ip);
1545 int hammer2_inode_chain_sync(hammer2_inode_t *ip);
1546 int hammer2_inode_chain_flush(hammer2_inode_t *ip, int flags);
1547 int hammer2_inode_unlink_finisher(hammer2_inode_t *ip, struct m_vnode **vpp);
1548 void hammer2_inode_vprecycle(struct m_vnode *vp);
1549 int hammer2_dirent_create(hammer2_inode_t *dip, const char *name,
1550                         size_t name_len, hammer2_key_t inum, uint8_t type);
1551
1552 hammer2_key_t hammer2_pfs_inode_count(hammer2_pfs_t *pmp);
1553 int vflush(struct mount *mp, int rootrefs, int flags);
1554
1555 /*
1556  * hammer2_chain.c
1557  */
1558 hammer2_chain_t *hammer2_chain_alloc(hammer2_dev_t *hmp,
1559                                 hammer2_pfs_t *pmp,
1560                                 hammer2_blockref_t *bref);
1561 void hammer2_chain_init(hammer2_chain_t *chain);
1562 void hammer2_chain_ref(hammer2_chain_t *chain);
1563 void hammer2_chain_ref_hold(hammer2_chain_t *chain);
1564 void hammer2_chain_drop(hammer2_chain_t *chain);
1565 void hammer2_chain_drop_unhold(hammer2_chain_t *chain);
1566 void hammer2_chain_unhold(hammer2_chain_t *chain);
1567 void hammer2_chain_rehold(hammer2_chain_t *chain);
1568 int hammer2_chain_lock(hammer2_chain_t *chain, int how);
1569 //void hammer2_chain_lock_unhold(hammer2_chain_t *chain, int how);
1570 void hammer2_chain_load_data(hammer2_chain_t *chain);
1571
1572 int hammer2_chain_inode_find(hammer2_pfs_t *pmp, hammer2_key_t inum,
1573                                 int clindex, int flags,
1574                                 hammer2_chain_t **parentp,
1575                                 hammer2_chain_t **chainp);
1576 int hammer2_chain_modify(hammer2_chain_t *chain, hammer2_tid_t mtid,
1577                                 hammer2_off_t dedup_off, int flags);
1578 int hammer2_chain_modify_ip(hammer2_inode_t *ip, hammer2_chain_t *chain,
1579                                 hammer2_tid_t mtid, int flags);
1580 int hammer2_chain_resize(hammer2_chain_t *chain,
1581                                 hammer2_tid_t mtid, hammer2_off_t dedup_off,
1582                                 int nradix, int flags);
1583 void hammer2_chain_unlock(hammer2_chain_t *chain);
1584 //void hammer2_chain_unlock_hold(hammer2_chain_t *chain);
1585 hammer2_chain_t *hammer2_chain_get(hammer2_chain_t *parent, int generation,
1586                                 hammer2_blockref_t *bref, int how);
1587 hammer2_chain_t *hammer2_chain_lookup_init(hammer2_chain_t *parent, int flags);
1588 void hammer2_chain_lookup_done(hammer2_chain_t *parent);
1589 hammer2_chain_t *hammer2_chain_getparent(hammer2_chain_t *chain, int flags);
1590 hammer2_chain_t *hammer2_chain_repparent(hammer2_chain_t **chainp, int flags);
1591 hammer2_chain_t *hammer2_chain_lookup(hammer2_chain_t **parentp,
1592                                 hammer2_key_t *key_nextp,
1593                                 hammer2_key_t key_beg, hammer2_key_t key_end,
1594                                 int *errorp, int flags);
1595 hammer2_chain_t *hammer2_chain_next(hammer2_chain_t **parentp,
1596                                 hammer2_chain_t *chain,
1597                                 hammer2_key_t *key_nextp,
1598                                 hammer2_key_t key_beg, hammer2_key_t key_end,
1599                                 int *errorp, int flags);
1600 int hammer2_chain_scan(hammer2_chain_t *parent,
1601                                 hammer2_chain_t **chainp,
1602                                 hammer2_blockref_t *bref,
1603                                 int *firstp, int flags);
1604
1605 int hammer2_chain_create(hammer2_chain_t **parentp, hammer2_chain_t **chainp,
1606                                 hammer2_dev_t *hmp, hammer2_pfs_t *pmp,
1607                                 int methods, hammer2_key_t key, int keybits,
1608                                 int type, size_t bytes, hammer2_tid_t mtid,
1609                                 hammer2_off_t dedup_off, int flags);
1610 void hammer2_chain_rename(hammer2_chain_t **parentp,
1611                                 hammer2_chain_t *chain,
1612                                 hammer2_tid_t mtid, int flags);
1613 int hammer2_chain_delete(hammer2_chain_t *parent, hammer2_chain_t *chain,
1614                                 hammer2_tid_t mtid, int flags);
1615 int hammer2_chain_indirect_maintenance(hammer2_chain_t *parent,
1616                                 hammer2_chain_t *chain);
1617 void hammer2_chain_setflush(hammer2_chain_t *chain);
1618 void hammer2_chain_countbrefs(hammer2_chain_t *chain,
1619                                 hammer2_blockref_t *base, int count);
1620 hammer2_chain_t *hammer2_chain_bulksnap(hammer2_dev_t *hmp);
1621 void hammer2_chain_bulkdrop(hammer2_chain_t *copy);
1622
1623 void hammer2_chain_setcheck(hammer2_chain_t *chain, void *bdata);
1624 int hammer2_chain_testcheck(hammer2_chain_t *chain, void *bdata);
1625 int hammer2_chain_dirent_test(hammer2_chain_t *chain, const char *name,
1626                                 size_t name_len);
1627
1628 void hammer2_base_delete(hammer2_chain_t *parent,
1629                                 hammer2_blockref_t *base, int count,
1630                                 hammer2_chain_t *chain,
1631                                 hammer2_blockref_t *obref);
1632 void hammer2_base_insert(hammer2_chain_t *parent,
1633                                 hammer2_blockref_t *base, int count,
1634                                 hammer2_chain_t *chain,
1635                                 hammer2_blockref_t *elm);
1636 void hammer2_dump_chain(hammer2_chain_t *chain, int tab, int bi, int *countp,
1637                                 char pfx, u_int flags);
1638 void hammer2_dump_chains(hammer2_dev_t *hmp, char vpfx, char fpfx);
1639
1640 /*
1641  * hammer2_flush.c
1642  */
1643 void hammer2_trans_manage_init(hammer2_pfs_t *pmp);
1644 int hammer2_flush(hammer2_chain_t *chain, int istop);
1645 void hammer2_trans_init(hammer2_pfs_t *pmp, uint32_t flags);
1646 void hammer2_trans_setflags(hammer2_pfs_t *pmp, uint32_t flags);
1647 void hammer2_trans_clearflags(hammer2_pfs_t *pmp, uint32_t flags);
1648 hammer2_tid_t hammer2_trans_sub(hammer2_pfs_t *pmp);
1649 void hammer2_trans_done(hammer2_pfs_t *pmp, uint32_t flags);
1650 hammer2_tid_t hammer2_trans_newinum(hammer2_pfs_t *pmp);
1651 void hammer2_trans_assert_strategy(hammer2_pfs_t *pmp);
1652
1653 /*
1654  * hammer2_ioctl.c
1655  */
1656 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
1657                                 int fflag, struct ucred *cred);
1658 int hammer2_ioctl_bulkfree_scan(hammer2_inode_t *ip, void *data);
1659 int hammer2_ioctl_destroy(hammer2_inode_t *ip, void *data);
1660 int hammer2_ioctl_growfs(hammer2_inode_t *ip, void *data, struct ucred *cred);
1661
1662 /*
1663  * hammer2_io.c
1664  */
1665 void hammer2_io_inval(hammer2_io_t *dio, hammer2_off_t data_off, u_int bytes);
1666 void hammer2_io_cleanup(hammer2_dev_t *hmp, struct hammer2_io_tree *tree);
1667 char *hammer2_io_data(hammer2_io_t *dio, off_t lbase);
1668 void hammer2_io_bkvasync(hammer2_io_t *dio);
1669 void hammer2_io_dedup_set(hammer2_dev_t *hmp, hammer2_blockref_t *bref);
1670 void hammer2_io_dedup_delete(hammer2_dev_t *hmp, uint8_t btype,
1671                                 hammer2_off_t data_off, u_int bytes);
1672 void hammer2_io_dedup_assert(hammer2_dev_t *hmp, hammer2_off_t data_off,
1673                                 u_int bytes);
1674 int hammer2_io_new(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize,
1675                                 hammer2_io_t **diop);
1676 int hammer2_io_newnz(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize,
1677                                 hammer2_io_t **diop);
1678 int _hammer2_io_bread(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize,
1679                                 hammer2_io_t **diop HAMMER2_IO_DEBUG_ARGS);
1680 void hammer2_io_setdirty(hammer2_io_t *dio);
1681
1682 hammer2_io_t *_hammer2_io_getblk(hammer2_dev_t *hmp, int btype, off_t lbase,
1683                                 int lsize, int op HAMMER2_IO_DEBUG_ARGS);
1684 hammer2_io_t *_hammer2_io_getquick(hammer2_dev_t *hmp, off_t lbase,
1685                                 int lsize HAMMER2_IO_DEBUG_ARGS);
1686 void _hammer2_io_putblk(hammer2_io_t **diop HAMMER2_IO_DEBUG_ARGS);
1687 int _hammer2_io_bwrite(hammer2_io_t **diop HAMMER2_IO_DEBUG_ARGS);
1688 void _hammer2_io_bawrite(hammer2_io_t **diop HAMMER2_IO_DEBUG_ARGS);
1689 void _hammer2_io_bdwrite(hammer2_io_t **diop HAMMER2_IO_DEBUG_ARGS);
1690 void _hammer2_io_brelse(hammer2_io_t **diop HAMMER2_IO_DEBUG_ARGS);
1691 void _hammer2_io_bqrelse(hammer2_io_t **diop HAMMER2_IO_DEBUG_ARGS);
1692 void _hammer2_io_ref(hammer2_io_t *dio HAMMER2_IO_DEBUG_ARGS);
1693
1694 #ifndef HAMMER2_IO_DEBUG
1695
1696 #define hammer2_io_getblk(hmp, btype, lbase, lsize, op)                 \
1697         _hammer2_io_getblk((hmp), (btype), (lbase), (lsize), (op))
1698 #define hammer2_io_getquick(hmp, lbase, lsize)                          \
1699         _hammer2_io_getquick((hmp), (lbase), (lsize))
1700 #define hammer2_io_putblk(diop)                                         \
1701         _hammer2_io_putblk(diop)
1702 #define hammer2_io_bwrite(diop)                                         \
1703         _hammer2_io_bwrite((diop))
1704 #define hammer2_io_bawrite(diop)                                        \
1705         _hammer2_io_bawrite((diop))
1706 #define hammer2_io_bdwrite(diop)                                        \
1707         _hammer2_io_bdwrite((diop))
1708 #define hammer2_io_brelse(diop)                                         \
1709         _hammer2_io_brelse((diop))
1710 #define hammer2_io_bqrelse(diop)                                        \
1711         _hammer2_io_bqrelse((diop))
1712 #define hammer2_io_ref(dio)                                             \
1713         _hammer2_io_ref((dio))
1714
1715 #define hammer2_io_bread(hmp, btype, lbase, lsize, diop)                \
1716         _hammer2_io_bread((hmp), (btype), (lbase), (lsize), (diop))
1717
1718 #else
1719
1720 #define hammer2_io_getblk(hmp, btype, lbase, lsize, op)                 \
1721         _hammer2_io_getblk((hmp), (btype), (lbase), (lsize), (op),      \
1722         __FILE__, __LINE__)
1723
1724 #define hammer2_io_getquick(hmp, lbase, lsize)                          \
1725         _hammer2_io_getquick((hmp), (lbase), (lsize), __FILE__, __LINE__)
1726
1727 #define hammer2_io_putblk(diop)                                         \
1728         _hammer2_io_putblk(diop, __FILE__, __LINE__)
1729
1730 #define hammer2_io_bwrite(diop)                                         \
1731         _hammer2_io_bwrite((diop), __FILE__, __LINE__)
1732 #define hammer2_io_bawrite(diop)                                        \
1733         _hammer2_io_bawrite((diop), __FILE__, __LINE__)
1734 #define hammer2_io_bdwrite(diop)                                        \
1735         _hammer2_io_bdwrite((diop), __FILE__, __LINE__)
1736 #define hammer2_io_brelse(diop)                                         \
1737         _hammer2_io_brelse((diop), __FILE__, __LINE__)
1738 #define hammer2_io_bqrelse(diop)                                        \
1739         _hammer2_io_bqrelse((diop), __FILE__, __LINE__)
1740 #define hammer2_io_ref(dio)                                             \
1741         _hammer2_io_ref((dio), __FILE__, __LINE__)
1742
1743 #define hammer2_io_bread(hmp, btype, lbase, lsize, diop)                \
1744         _hammer2_io_bread((hmp), (btype), (lbase), (lsize), (diop),     \
1745                           __FILE__, __LINE__)
1746
1747 #endif
1748
1749 /*
1750  * hammer2_admin.c
1751  */
1752 void hammer2_thr_signal(hammer2_thread_t *thr, uint32_t flags);
1753 void hammer2_thr_signal2(hammer2_thread_t *thr,
1754                         uint32_t pflags, uint32_t nflags);
1755 void hammer2_thr_wait(hammer2_thread_t *thr, uint32_t flags);
1756 void hammer2_thr_wait_neg(hammer2_thread_t *thr, uint32_t flags);
1757 int hammer2_thr_wait_any(hammer2_thread_t *thr, uint32_t flags, int timo);
1758 void hammer2_thr_create(hammer2_thread_t *thr,
1759                         hammer2_pfs_t *pmp, hammer2_dev_t *hmp,
1760                         const char *id, int clindex, int repidx,
1761                         void (*func)(void *arg));
1762 void hammer2_thr_delete(hammer2_thread_t *thr);
1763 void hammer2_thr_remaster(hammer2_thread_t *thr);
1764 void hammer2_thr_freeze_async(hammer2_thread_t *thr);
1765 void hammer2_thr_freeze(hammer2_thread_t *thr);
1766 void hammer2_thr_unfreeze(hammer2_thread_t *thr);
1767 int hammer2_thr_break(hammer2_thread_t *thr);
1768 void hammer2_primary_xops_thread(void *arg);
1769
1770 /*
1771  * hammer2_thread.c (XOP API)
1772  */
1773 void *hammer2_xop_alloc(hammer2_inode_t *ip, int flags);
1774 void hammer2_xop_setname(hammer2_xop_head_t *xop,
1775                                 const char *name, size_t name_len);
1776 void hammer2_xop_setname2(hammer2_xop_head_t *xop,
1777                                 const char *name, size_t name_len);
1778 size_t hammer2_xop_setname_inum(hammer2_xop_head_t *xop, hammer2_key_t inum);
1779 void hammer2_xop_setip2(hammer2_xop_head_t *xop, hammer2_inode_t *ip2);
1780 void hammer2_xop_setip3(hammer2_xop_head_t *xop, hammer2_inode_t *ip3);
1781 void hammer2_xop_setip4(hammer2_xop_head_t *xop, hammer2_inode_t *ip4);
1782 void hammer2_xop_reinit(hammer2_xop_head_t *xop);
1783 void hammer2_xop_helper_create(hammer2_pfs_t *pmp);
1784 void hammer2_xop_helper_cleanup(hammer2_pfs_t *pmp);
1785 void hammer2_xop_start(hammer2_xop_head_t *xop, hammer2_xop_desc_t *desc);
1786 void hammer2_xop_start_except(hammer2_xop_head_t *xop, hammer2_xop_desc_t *desc,
1787                                 int notidx);
1788 int hammer2_xop_collect(hammer2_xop_head_t *xop, int flags);
1789 void hammer2_xop_retire(hammer2_xop_head_t *xop, uint64_t mask);
1790 int hammer2_xop_active(hammer2_xop_head_t *xop);
1791 int hammer2_xop_feed(hammer2_xop_head_t *xop, hammer2_chain_t *chain,
1792                                 int clindex, int error);
1793
1794 /*
1795  * hammer2_synchro.c
1796  */
1797 void hammer2_primary_sync_thread(void *arg);
1798
1799 /*
1800  * XOP backends in hammer2_xops.c, primarily for VNOPS.  Other XOP backends
1801  * may be integrated into other source files.
1802  */
1803 void hammer2_xop_ipcluster(hammer2_xop_t *xop, void *scratch, int clindex);
1804 void hammer2_xop_readdir(hammer2_xop_t *xop, void *scratch, int clindex);
1805 void hammer2_xop_nresolve(hammer2_xop_t *xop, void *scratch, int clindex);
1806 void hammer2_xop_unlink(hammer2_xop_t *xop, void *scratch, int clindex);
1807 void hammer2_xop_nrename(hammer2_xop_t *xop, void *scratch, int clindex);
1808 void hammer2_xop_scanlhc(hammer2_xop_t *xop, void *scratch, int clindex);
1809 void hammer2_xop_scanall(hammer2_xop_t *xop, void *scratch, int clindex);
1810 void hammer2_xop_lookup(hammer2_xop_t *xop, void *scratch, int clindex);
1811 void hammer2_xop_delete(hammer2_xop_t *xop, void *scratch, int clindex);
1812 void hammer2_xop_inode_mkdirent(hammer2_xop_t *xop, void *scratch, int clindex);
1813 void hammer2_xop_inode_create(hammer2_xop_t *xop, void *scratch, int clindex);
1814 void hammer2_xop_inode_create_det(hammer2_xop_t *xop,
1815                                 void *scratch, int clindex);
1816 void hammer2_xop_inode_create_ins(hammer2_xop_t *xop,
1817                                 void *scratch, int clindex);
1818 void hammer2_xop_inode_destroy(hammer2_xop_t *xop, void *scratch, int clindex);
1819 void hammer2_xop_inode_chain_sync(hammer2_xop_t *xop, void *scratch,
1820                                 int clindex);
1821 void hammer2_xop_inode_unlinkall(hammer2_xop_t *xop, void *scratch,
1822                                 int clindex);
1823 void hammer2_xop_inode_connect(hammer2_xop_t *xop, void *scratch, int clindex);
1824 void hammer2_xop_inode_flush(hammer2_xop_t *xop, void *scratch, int clindex);
1825 void hammer2_xop_strategy_read(hammer2_xop_t *xop, void *scratch, int clindex);
1826 void hammer2_xop_strategy_write(hammer2_xop_t *xop, void *scratch, int clindex);
1827
1828 void hammer2_dmsg_ipcluster(hammer2_xop_t *xop, void *scratch, int clindex);
1829 void hammer2_dmsg_readdir(hammer2_xop_t *xop, void *scratch, int clindex);
1830 void hammer2_dmsg_nresolve(hammer2_xop_t *xop, void *scratch, int clindex);
1831 void hammer2_dmsg_unlink(hammer2_xop_t *xop, void *scratch, int clindex);
1832 void hammer2_dmsg_nrename(hammer2_xop_t *xop, void *scratch, int clindex);
1833 void hammer2_dmsg_scanlhc(hammer2_xop_t *xop, void *scratch, int clindex);
1834 void hammer2_dmsg_scanall(hammer2_xop_t *xop, void *scratch, int clindex);
1835 void hammer2_dmsg_lookup(hammer2_xop_t *xop, void *scratch, int clindex);
1836 void hammer2_dmsg_inode_mkdirent(hammer2_xop_t *xop, void *scratch,
1837                                 int clindex);
1838 void hammer2_dmsg_inode_create(hammer2_xop_t *xop, void *scratch, int clindex);
1839 void hammer2_dmsg_inode_destroy(hammer2_xop_t *xop, void *scratch, int clindex);
1840 void hammer2_dmsg_inode_chain_sync(hammer2_xop_t *xop, void *scratch,
1841                                 int clindex);
1842 void hammer2_dmsg_inode_unlinkall(hammer2_xop_t *xop, void *scratch,
1843                                 int clindex);
1844 void hammer2_dmsg_inode_connect(hammer2_xop_t *xop, void *scratch, int clindex);
1845 void hammer2_dmsg_inode_flush(hammer2_xop_t *xop, void *scratch, int clindex);
1846 void hammer2_dmsg_strategy_read(hammer2_xop_t *xop, void *scratch, int clindex);
1847 void hammer2_dmsg_strategy_write(hammer2_xop_t *xop, void *scratch,
1848                                 int clindex);
1849
1850 void hammer2_rmsg_ipcluster(hammer2_xop_t *xop, void *scratch, int clindex);
1851 void hammer2_rmsg_readdir(hammer2_xop_t *xop, void *scratch, int clindex);
1852 void hammer2_rmsg_nresolve(hammer2_xop_t *xop, void *scratch, int clindex);
1853 void hammer2_rmsg_unlink(hammer2_xop_t *xop, void *scratch, int clindex);
1854 void hammer2_rmsg_nrename(hammer2_xop_t *xop, void *scratch, int clindex);
1855 void hammer2_rmsg_scanlhc(hammer2_xop_t *xop, void *scratch, int clindex);
1856 void hammer2_rmsg_scanall(hammer2_xop_t *xop, void *scratch, int clindex);
1857 void hammer2_rmsg_lookup(hammer2_xop_t *xop, void *scratch, int clindex);
1858 void hammer2_rmsg_inode_mkdirent(hammer2_xop_t *xop, void *scratch,
1859                                 int clindex);
1860 void hammer2_rmsg_inode_create(hammer2_xop_t *xop, void *scratch, int clindex);
1861 void hammer2_rmsg_inode_destroy(hammer2_xop_t *xop, void *scratch, int clindex);
1862 void hammer2_rmsg_inode_chain_sync(hammer2_xop_t *xop, void *scratch,
1863                                 int clindex);
1864 void hammer2_rmsg_inode_unlinkall(hammer2_xop_t *xop, void *scratch,
1865                                 int clindex);
1866 void hammer2_rmsg_inode_connect(hammer2_xop_t *xop, void *scratch, int clindex);
1867 void hammer2_rmsg_inode_flush(hammer2_xop_t *xop, void *scratch, int clindex);
1868 void hammer2_rmsg_strategy_read(hammer2_xop_t *xop, void *scratch, int clindex);
1869 void hammer2_rmsg_strategy_write(hammer2_xop_t *xop, void *scratch,
1870                                 int clindex);
1871
1872 extern hammer2_xop_desc_t hammer2_ipcluster_desc;
1873 extern hammer2_xop_desc_t hammer2_readdir_desc;
1874 extern hammer2_xop_desc_t hammer2_nresolve_desc;
1875 extern hammer2_xop_desc_t hammer2_unlink_desc;
1876 extern hammer2_xop_desc_t hammer2_nrename_desc;
1877 extern hammer2_xop_desc_t hammer2_scanlhc_desc;
1878 extern hammer2_xop_desc_t hammer2_scanall_desc;
1879 extern hammer2_xop_desc_t hammer2_lookup_desc;
1880 extern hammer2_xop_desc_t hammer2_delete_desc;
1881 extern hammer2_xop_desc_t hammer2_inode_mkdirent_desc;
1882 extern hammer2_xop_desc_t hammer2_inode_create_desc;
1883 extern hammer2_xop_desc_t hammer2_inode_create_det_desc;
1884 extern hammer2_xop_desc_t hammer2_inode_create_ins_desc;
1885 extern hammer2_xop_desc_t hammer2_inode_destroy_desc;
1886 extern hammer2_xop_desc_t hammer2_inode_chain_sync_desc;
1887 extern hammer2_xop_desc_t hammer2_inode_unlinkall_desc;
1888 extern hammer2_xop_desc_t hammer2_inode_connect_desc;
1889 extern hammer2_xop_desc_t hammer2_inode_flush_desc;
1890 extern hammer2_xop_desc_t hammer2_strategy_read_desc;
1891 extern hammer2_xop_desc_t hammer2_strategy_write_desc;
1892
1893 /*
1894  * hammer2_msgops.c
1895  */
1896 /*
1897 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg);
1898 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg);
1899 */
1900
1901 /*
1902  * hammer2_vfsops.c
1903  */
1904 int hammer2_vfs_sync(struct mount *mp, int waitflags);
1905 int hammer2_vfs_sync_pmp(hammer2_pfs_t *pmp, int waitfor);
1906 int hammer2_vfs_enospace(hammer2_inode_t *ip, off_t bytes, struct ucred *cred);
1907
1908 hammer2_pfs_t *hammer2_pfsalloc(hammer2_chain_t *chain,
1909                                 const hammer2_inode_data_t *ripdata,
1910                                 hammer2_dev_t *force_local);
1911 void hammer2_pfsdealloc(hammer2_pfs_t *pmp, int clindex, int destroying);
1912 int hammer2_vfs_vget(struct mount *mp, struct m_vnode *dvp,
1913                                 ino_t ino, struct m_vnode **vpp);
1914 int hammer2_vfs_root(struct mount *mp, struct m_vnode **vpp);
1915
1916 void hammer2_lwinprog_ref(hammer2_pfs_t *pmp);
1917 void hammer2_lwinprog_drop(hammer2_pfs_t *pmp);
1918 void hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int pipe);
1919
1920 void hammer2_pfs_memory_wait(hammer2_pfs_t *pmp);
1921 void hammer2_pfs_memory_inc(hammer2_pfs_t *pmp);
1922 void hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp, int count);
1923
1924 void hammer2_voldata_lock(hammer2_dev_t *hmp);
1925 void hammer2_voldata_unlock(hammer2_dev_t *hmp);
1926 void hammer2_voldata_modify(hammer2_dev_t *hmp);
1927
1928 int hammer2_vfs_init(void);
1929 int hammer2_vfs_uninit(void);
1930
1931 int hammer2_vfs_mount(struct m_vnode *makefs_devvp, struct mount *mp,
1932                         const char *label, const struct hammer2_mount_info *mi);
1933 int hammer2_vfs_unmount(struct mount *mp, int mntflags);
1934
1935 /*
1936  * hammer2_freemap.c
1937  */
1938 int hammer2_freemap_alloc(hammer2_chain_t *chain, size_t bytes);
1939 void hammer2_freemap_adjust(hammer2_dev_t *hmp,
1940                                 hammer2_blockref_t *bref, int how);
1941
1942 /*
1943  * hammer2_cluster.c
1944  */
1945 uint8_t hammer2_cluster_type(hammer2_cluster_t *cluster);
1946 void hammer2_cluster_bref(hammer2_cluster_t *cluster, hammer2_blockref_t *bref);
1947 void hammer2_cluster_ref(hammer2_cluster_t *cluster);
1948 void hammer2_cluster_drop(hammer2_cluster_t *cluster);
1949 void hammer2_cluster_unhold(hammer2_cluster_t *cluster);
1950 void hammer2_cluster_rehold(hammer2_cluster_t *cluster);
1951 void hammer2_cluster_lock(hammer2_cluster_t *cluster, int how);
1952 int hammer2_cluster_check(hammer2_cluster_t *cluster, hammer2_key_t lokey,
1953                         int flags);
1954 void hammer2_cluster_unlock(hammer2_cluster_t *cluster);
1955
1956 void hammer2_bulkfree_init(hammer2_dev_t *hmp);
1957 void hammer2_bulkfree_uninit(hammer2_dev_t *hmp);
1958 int hammer2_bulkfree_pass(hammer2_dev_t *hmp, hammer2_chain_t *vchain,
1959                         struct hammer2_ioc_bulkfree *bfi);
1960 void hammer2_dummy_xop_from_chain(hammer2_xop_head_t *xop,
1961                         hammer2_chain_t *chain);
1962
1963 /*
1964  * hammer2_iocom.c
1965  */
1966 /*
1967 void hammer2_iocom_init(hammer2_dev_t *hmp);
1968 void hammer2_iocom_uninit(hammer2_dev_t *hmp);
1969 void hammer2_cluster_reconnect(hammer2_dev_t *hmp, struct file *fp);
1970 */
1971 void hammer2_volconf_update(hammer2_dev_t *hmp, int index);
1972
1973 /*
1974  * hammer2_strategy.c
1975  */
1976 int hammer2_vop_strategy(struct vop_strategy_args *ap);
1977 int hammer2_vop_bmap(struct vop_bmap_args *ap);
1978 void hammer2_bioq_sync(hammer2_pfs_t *pmp);
1979 void hammer2_dedup_record(hammer2_chain_t *chain, hammer2_io_t *dio,
1980                                 const char *data);
1981 void hammer2_dedup_clear(hammer2_dev_t *hmp);
1982
1983 /*
1984  * hammer2_ondisk.c
1985  */
1986 int hammer2_open_devvp(const hammer2_devvp_list_t *devvpl, int ronly);
1987 int hammer2_close_devvp(const hammer2_devvp_list_t *devvpl, int ronly);
1988 int hammer2_init_devvp(struct m_vnode *devvp, hammer2_devvp_list_t *devvpl);
1989 void hammer2_cleanup_devvp(hammer2_devvp_list_t *devvpl);
1990 int hammer2_init_vfsvolumes(struct mount *mp, const hammer2_devvp_list_t *devvpl,
1991                         hammer2_vfsvolume_t *volumes,
1992                         hammer2_volume_data_t *rootvoldata,
1993                         int *rootvolzone,
1994                         struct m_vnode **rootvoldevvp);
1995 hammer2_vfsvolume_t *hammer2_get_volume(hammer2_dev_t *hmp, hammer2_off_t offset);
1996
1997 /*
1998  * hammer2_vnops.c
1999  */
2000 int hammer2_reclaim(struct m_vnode *vp);
2001 int hammer2_write(struct m_vnode *vp, void *buf, size_t size, off_t offset);
2002 int hammer2_nresolve(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen);
2003 int hammer2_nmkdir(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen,
2004                         mode_t mode);
2005 int hammer2_nlink(struct m_vnode *dvp, struct m_vnode *vp, char *name, int nlen);
2006 int hammer2_ncreate(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen,
2007                         mode_t mode);
2008 int hammer2_nmknod(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen,
2009                         int type, mode_t mode);
2010 int hammer2_nsymlink(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen,
2011                         char *target, mode_t mode);
2012
2013 /*
2014  * hammer2_buf.c
2015  */
2016 struct m_buf *getblkx(struct m_vnode *vp, off_t loffset, int size, int blkflags,
2017                         int slptimeo);
2018 int breadx(struct m_vnode *vp, off_t loffset, int size, struct m_buf **bpp);
2019 int bread_kvabio(struct m_vnode *vp, off_t loffset, int size, struct m_buf **bpp);
2020 void bqrelse(struct m_buf *bp);
2021 int bawrite(struct m_buf *bp);
2022 int uiomovebp(struct m_buf *bp, caddr_t cp, size_t n, struct uio *uio);
2023
2024 /*
2025  * More complex inlines
2026  */
2027
2028 #define hammer2_xop_gdata(xop)  _hammer2_xop_gdata((xop), __FILE__, __LINE__)
2029
2030 static __inline
2031 const hammer2_media_data_t *
2032 _hammer2_xop_gdata(hammer2_xop_head_t *xop, const char *file, int line)
2033 {
2034         hammer2_chain_t *focus;
2035         const void *data;
2036
2037         focus = xop->cluster.focus;
2038         if (focus->dio) {
2039                 lockmgr(&focus->diolk, LK_SHARED);
2040                 if ((xop->focus_dio = focus->dio) != NULL) {
2041                         _hammer2_io_ref(xop->focus_dio HAMMER2_IO_DEBUG_CALL);
2042                         hammer2_io_bkvasync(xop->focus_dio);
2043                 }
2044                 data = focus->data;
2045                 lockmgr(&focus->diolk, LK_RELEASE);
2046         } else {
2047                 data = focus->data;
2048         }
2049
2050         return data;
2051 }
2052
2053 #define hammer2_xop_pdata(xop)  _hammer2_xop_pdata((xop), __FILE__, __LINE__)
2054
2055 static __inline
2056 void
2057 _hammer2_xop_pdata(hammer2_xop_head_t *xop, const char *file, int line)
2058 {
2059         if (xop->focus_dio)
2060                 _hammer2_io_putblk(&xop->focus_dio HAMMER2_IO_DEBUG_CALL);
2061 }
2062
2063 static __inline
2064 void
2065 hammer2_knote(struct m_vnode *vp, int flags)
2066 {
2067         if (flags)
2068                 KNOTE(&vp->v_pollinfo.vpi_kqinfo.ki_note, flags);
2069 }
2070
2071 static __inline
2072 void
2073 hammer2_iocom_init(hammer2_dev_t *hmp)
2074 {
2075 }
2076
2077 static __inline
2078 void
2079 hammer2_iocom_uninit(hammer2_dev_t *hmp)
2080 {
2081 }
2082
2083 //#endif /* !_KERNEL */
2084 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */