sys/vfs/hammer2/hammer2.h

   1 /*
   2  * Copyright (c) 2011-2015 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@dragonflybsd.org>
   6  * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
  38  *
  39  * This header file contains structures used internally by the HAMMER2
  40  * implementation.  See hammer2_disk.h for on-disk structures.
  41  *
  42  * There is an in-memory representation of all on-media data structure.
  43  * Almost everything is represented by a hammer2_chain structure in-memory.
  44  * Other higher-level structures typically map to chains.
  45  *
  46  * A great deal of data is accessed simply via its buffer cache buffer,
  47  * which is mapped for the duration of the chain's lock.  Hammer2 must
  48  * implement its own buffer cache layer on top of the system layer to
  49  * allow for different threads to lock different sub-block-sized buffers.
  50  *
  51  * When modifications are made to a chain a new filesystem block must be
  52  * allocated.  Multiple modifications do not typically allocate new blocks
  53  * until the current block has been flushed.  Flushes do not block the
  54  * front-end unless the front-end operation crosses the current inode being
  55  * flushed.
  56  *
  57  * The in-memory representation may remain cached (for example in order to
  58  * placemark clustering locks) even after the related data has been
  59  * detached.
  60  */
  61
  62 #ifndef _VFS_HAMMER2_HAMMER2_H_
  63 #define _VFS_HAMMER2_HAMMER2_H_
  64
  65 #include <sys/param.h>
  66 #include <sys/types.h>
  67 #include <sys/kernel.h>
  68 #include <sys/conf.h>
  69 #include <sys/systm.h>
  70 #include <sys/tree.h>
  71 #include <sys/malloc.h>
  72 #include <sys/mount.h>
  73 #include <sys/vnode.h>
  74 #include <sys/proc.h>
  75 #include <sys/mountctl.h>
  76 #include <sys/priv.h>
  77 #include <sys/stat.h>
  78 #include <sys/thread.h>
  79 #include <sys/globaldata.h>
  80 #include <sys/lockf.h>
  81 #include <sys/buf.h>
  82 #include <sys/queue.h>
  83 #include <sys/limits.h>
  84 #include <sys/dmsg.h>
  85 #include <sys/mutex.h>
  86 #include <sys/kern_syscall.h>
  87
  88 #include <sys/signal2.h>
  89 #include <sys/buf2.h>
  90 #include <sys/mutex2.h>
  91 #include <sys/thread2.h>
  92
  93 #include "hammer2_disk.h"
  94 #include "hammer2_mount.h"
  95 #include "hammer2_ioctl.h"
  96
  97 struct hammer2_io;
  98 struct hammer2_iocb;
  99 struct hammer2_chain;
 100 struct hammer2_cluster;
 101 struct hammer2_inode;
 102 struct hammer2_dev;
 103 struct hammer2_pfs;
 104 struct hammer2_span;
 105 struct hammer2_state;
 106 struct hammer2_msg;
 107 struct hammer2_thread;
 108 union hammer2_xop;
 109
 110 /*
 111  * Mutex and lock shims.  Hammer2 requires support for asynchronous and
 112  * abortable locks, and both exclusive and shared spinlocks.  Normal
 113  * synchronous non-abortable locks can be substituted for spinlocks.
 114  */
 115 typedef mtx_t                           hammer2_mtx_t;
 116 typedef mtx_link_t                      hammer2_mtx_link_t;
 117 typedef mtx_state_t                     hammer2_mtx_state_t;
 118
 119 typedef struct spinlock                 hammer2_spin_t;
 120
 121 #define hammer2_mtx_ex                  mtx_lock_ex_quick
 122 #define hammer2_mtx_sh                  mtx_lock_sh_quick
 123 #define hammer2_mtx_unlock              mtx_unlock
 124 #define hammer2_mtx_owned               mtx_owned
 125 #define hammer2_mtx_init                mtx_init
 126 #define hammer2_mtx_temp_release        mtx_lock_temp_release
 127 #define hammer2_mtx_temp_restore        mtx_lock_temp_restore
 128 #define hammer2_mtx_refs                mtx_lockrefs
 129
 130 #define hammer2_spin_init               spin_init
 131 #define hammer2_spin_sh                 spin_lock_shared
 132 #define hammer2_spin_ex                 spin_lock
 133 #define hammer2_spin_unsh               spin_unlock_shared
 134 #define hammer2_spin_unex               spin_unlock
 135
 136 TAILQ_HEAD(hammer2_xop_list, hammer2_xop_head);
 137
 138 typedef struct hammer2_xop_list hammer2_xop_list_t;
 139
 140
 141 /*
 142  * General lock support
 143  */
 144 static __inline
 145 int
 146 hammer2_mtx_upgrade(hammer2_mtx_t *mtx)
 147 {
 148         int wasexclusive;
 149
 150         if (mtx_islocked_ex(mtx)) {
 151                 wasexclusive = 1;
 152         } else {
 153                 mtx_unlock(mtx);
 154                 mtx_lock_ex_quick(mtx);
 155                 wasexclusive = 0;
 156         }
 157         return wasexclusive;
 158 }
 159
 160 /*
 161  * Downgrade an inode lock from exclusive to shared only if the inode
 162  * lock was previously shared.  If the inode lock was previously exclusive,
 163  * this is a NOP.
 164  */
 165 static __inline
 166 void
 167 hammer2_mtx_downgrade(hammer2_mtx_t *mtx, int wasexclusive)
 168 {
 169         if (wasexclusive == 0)
 170                 mtx_downgrade(mtx);
 171 }
 172
 173 /*
 174  * The xid tracks internal transactional updates.
 175  *
 176  * XXX fix-me, really needs to be 64-bits
 177  */
 178 typedef uint32_t hammer2_xid_t;
 179
 180 #define HAMMER2_XID_MIN 0x00000000U
 181 #define HAMMER2_XID_MAX 0x7FFFFFFFU
 182
 183 /*
 184  * The chain structure tracks a portion of the media topology from the
 185  * root (volume) down.  Chains represent volumes, inodes, indirect blocks,
 186  * data blocks, and freemap nodes and leafs.
 187  *
 188  * The chain structure utilizes a simple singly-homed topology and the
 189  * chain's in-memory topology will move around as the chains do, due mainly
 190  * to renames and indirect block creation.
 191  *
 192  * Block Table Updates
 193  *
 194  *      Block table updates for insertions and updates are delayed until the
 195  *      flush.  This allows us to avoid having to modify the parent chain
 196  *      all the way to the root.
 197  *
 198  *      Block table deletions are performed immediately (modifying the parent
 199  *      in the process) because the flush code uses the chain structure to
 200  *      track delayed updates and the chain will be (likely) gone or moved to
 201  *      another location in the topology after a deletion.
 202  *
 203  *      A prior iteration of the code tried to keep the relationship intact
 204  *      on deletes by doing a delete-duplicate operation on the chain, but
 205  *      it added way too much complexity to the codebase.
 206  *
 207  * Flush Synchronization
 208  *
 209  *      The flush code must flush modified chains bottom-up.  Because chain
 210  *      structures can shift around and are NOT topologically stable,
 211  *      modified chains are independently indexed for the flush.  As the flush
 212  *      runs it modifies (or further modifies) and updates the parents,
 213  *      propagating the flush all the way to the volume root.
 214  *
 215  *      Modifying front-end operations can occur during a flush but will block
 216  *      in two cases: (1) when the front-end tries to operate on the inode
 217  *      currently in the midst of being flushed and (2) if the front-end
 218  *      crosses an inode currently being flushed (such as during a rename).
 219  *      So, for example, if you rename directory "x" to "a/b/c/d/e/f/g/x" and
 220  *      the flusher is currently working on "a/b/c", the rename will block
 221  *      temporarily in order to ensure that "x" exists in one place or the
 222  *      other.
 223  *
 224  *      Meta-data statistics are updated by the flusher.  The front-end will
 225  *      make estimates but meta-data must be fully synchronized only during a
 226  *      flush in order to ensure that it remains correct across a crash.
 227  *
 228  *      Multiple flush synchronizations can theoretically be in-flight at the
 229  *      same time but the implementation is not coded to handle the case and
 230  *      currently serializes them.
 231  *
 232  * Snapshots:
 233  *
 234  *      Snapshots currently require the subdirectory tree being snapshotted
 235  *      to be flushed.  The snapshot then creates a new super-root inode which
 236  *      copies the flushed blockdata of the directory or file that was
 237  *      snapshotted.
 238  *
 239  * RBTREE NOTES:
 240  *
 241  *      - Note that the radix tree runs in powers of 2 only so sub-trees
 242  *        cannot straddle edges.
 243  */
 244 RB_HEAD(hammer2_chain_tree, hammer2_chain);
 245 TAILQ_HEAD(h2_flush_list, hammer2_chain);
 246 TAILQ_HEAD(h2_core_list, hammer2_chain);
 247 TAILQ_HEAD(h2_iocb_list, hammer2_iocb);
 248
 249 #define CHAIN_CORE_DELETE_BMAP_ENTRIES  \
 250         (HAMMER2_PBUFSIZE / sizeof(hammer2_blockref_t) / sizeof(uint32_t))
 251
 252 /*
 253  * Core topology for chain (embedded in chain).  Protected by a spinlock.
 254  */
 255 struct hammer2_chain_core {
 256         hammer2_spin_t  spin;
 257         struct hammer2_chain_tree rbtree; /* sub-chains */
 258         int             live_zero;      /* blockref array opt */
 259         u_int           live_count;     /* live (not deleted) chains in tree */
 260         u_int           chain_count;    /* live + deleted chains under core */
 261         int             generation;     /* generation number (inserts only) */
 262 };
 263
 264 typedef struct hammer2_chain_core hammer2_chain_core_t;
 265
 266 RB_HEAD(hammer2_io_tree, hammer2_io);
 267
 268 /*
 269  * IOCB - IO callback (into chain, cluster, or manual request)
 270  */
 271 struct hammer2_iocb {
 272         TAILQ_ENTRY(hammer2_iocb) entry;
 273         void (*callback)(struct hammer2_iocb *iocb);
 274         struct hammer2_io       *dio;
 275         struct hammer2_cluster  *cluster;
 276         struct hammer2_chain    *chain;
 277         void                    *ptr;
 278         off_t                   lbase;
 279         int                     lsize;
 280         uint32_t                flags;
 281         int                     error;
 282 };
 283
 284 typedef struct hammer2_iocb hammer2_iocb_t;
 285
 286 #define HAMMER2_IOCB_INTERLOCK  0x00000001
 287 #define HAMMER2_IOCB_ONQ        0x00000002
 288 #define HAMMER2_IOCB_DONE       0x00000004
 289 #define HAMMER2_IOCB_INPROG     0x00000008
 290 #define HAMMER2_IOCB_UNUSED10   0x00000010
 291 #define HAMMER2_IOCB_QUICK      0x00010000
 292 #define HAMMER2_IOCB_ZERO       0x00020000
 293 #define HAMMER2_IOCB_READ       0x00040000
 294 #define HAMMER2_IOCB_WAKEUP     0x00080000
 295
 296 /*
 297  * DIO - Management structure wrapping system buffer cache.
 298  *
 299  *       Used for multiple purposes including concurrent management
 300  *       if small requests by chains into larger DIOs.
 301  */
 302 struct hammer2_io {
 303         RB_ENTRY(hammer2_io) rbnode;    /* indexed by device offset */
 304         struct h2_iocb_list iocbq;
 305         struct spinlock spin;
 306         struct hammer2_dev *hmp;
 307         struct buf      *bp;
 308         off_t           pbase;
 309         int             psize;
 310         int             refs;
 311         int             act;                    /* activity */
 312 };
 313
 314 typedef struct hammer2_io hammer2_io_t;
 315
 316 #define HAMMER2_DIO_INPROG      0x80000000      /* bio in progress */
 317 #define HAMMER2_DIO_GOOD        0x40000000      /* dio->bp is stable */
 318 #define HAMMER2_DIO_WAITING     0x20000000      /* (old) */
 319 #define HAMMER2_DIO_DIRTY       0x10000000      /* flush on last drop */
 320
 321 #define HAMMER2_DIO_MASK        0x0FFFFFFF
 322
 323 /*
 324  * Primary chain structure keeps track of the topology in-memory.
 325  */
 326 struct hammer2_chain {
 327         hammer2_mtx_t           lock;
 328         hammer2_chain_core_t    core;
 329         RB_ENTRY(hammer2_chain) rbnode;         /* live chain(s) */
 330         hammer2_blockref_t      bref;
 331         struct hammer2_chain    *parent;
 332         struct hammer2_state    *state;         /* if active cache msg */
 333         struct hammer2_dev      *hmp;
 334         struct hammer2_pfs      *pmp;           /* A PFS or super-root (spmp) */
 335
 336         hammer2_io_t    *dio;                   /* physical data buffer */
 337         u_int           bytes;                  /* physical data size */
 338         u_int           flags;
 339         u_int           refs;
 340         u_int           lockcnt;
 341         int             error;                  /* on-lock data error state */
 342
 343         hammer2_media_data_t *data;             /* data pointer shortcut */
 344         TAILQ_ENTRY(hammer2_chain) flush_node;  /* flush list */
 345 };
 346
 347 typedef struct hammer2_chain hammer2_chain_t;
 348
 349 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
 350 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
 351
 352 /*
 353  * Special notes on flags:
 354  *
 355  * INITIAL      - This flag allows a chain to be created and for storage to
 356  *                be allocated without having to immediately instantiate the
 357  *                related buffer.  The data is assumed to be all-zeros.  It
 358  *                is primarily used for indirect blocks.
 359  *
 360  * MODIFIED     - The chain's media data has been modified.
 361  *
 362  * UPDATE       - Chain might not be modified but parent blocktable needs update
 363  *
 364  * FICTITIOUS   - Faked chain as a placeholder for an error condition.  This
 365  *                chain is unsuitable for I/O.
 366  *
 367  * BMAPPED      - Indicates that the chain is present in the parent blockmap.
 368  *
 369  * BMAPUPD      - Indicates that the chain is present but needs to be updated
 370  *                in the parent blockmap.
 371  */
 372 #define HAMMER2_CHAIN_MODIFIED          0x00000001      /* dirty chain data */
 373 #define HAMMER2_CHAIN_ALLOCATED         0x00000002      /* kmalloc'd chain */
 374 #define HAMMER2_CHAIN_DESTROY           0x00000004
 375 #define HAMMER2_CHAIN_UNUSED0008        0x00000008
 376 #define HAMMER2_CHAIN_DELETED           0x00000010      /* deleted chain */
 377 #define HAMMER2_CHAIN_INITIAL           0x00000020      /* initial create */
 378 #define HAMMER2_CHAIN_UPDATE            0x00000040      /* need parent update */
 379 #define HAMMER2_CHAIN_DEFERRED          0x00000080      /* flush depth defer */
 380 #define HAMMER2_CHAIN_IOFLUSH           0x00000100      /* bawrite on put */
 381 #define HAMMER2_CHAIN_ONFLUSH           0x00000200      /* on a flush list */
 382 #define HAMMER2_CHAIN_FICTITIOUS        0x00000400      /* unsuitable for I/O */
 383 #define HAMMER2_CHAIN_VOLUMESYNC        0x00000800      /* needs volume sync */
 384 #define HAMMER2_CHAIN_DELAYED           0x00001000      /* delayed flush */
 385 #define HAMMER2_CHAIN_COUNTEDBREFS      0x00002000      /* block table stats */
 386 #define HAMMER2_CHAIN_ONRBTREE          0x00004000      /* on parent RB tree */
 387 #define HAMMER2_CHAIN_UNUSED00008000    0x00008000
 388 #define HAMMER2_CHAIN_EMBEDDED          0x00010000      /* embedded data */
 389 #define HAMMER2_CHAIN_RELEASE           0x00020000      /* don't keep around */
 390 #define HAMMER2_CHAIN_BMAPPED           0x00040000      /* present in blkmap */
 391 #define HAMMER2_CHAIN_BMAPUPD           0x00080000      /* +needs updating */
 392 #define HAMMER2_CHAIN_IOINPROG          0x00100000      /* I/O interlock */
 393 #define HAMMER2_CHAIN_IOSIGNAL          0x00200000      /* I/O interlock */
 394 #define HAMMER2_CHAIN_PFSBOUNDARY       0x00400000      /* super->pfs inode */
 395
 396 #define HAMMER2_CHAIN_FLUSH_MASK        (HAMMER2_CHAIN_MODIFIED |       \
 397                                          HAMMER2_CHAIN_UPDATE |         \
 398                                          HAMMER2_CHAIN_ONFLUSH)
 399
 400 /*
 401  * Hammer2 error codes, used by chain->error and cluster->error.  The error
 402  * code is typically set on-lock unless no I/O was requested, and set on
 403  * I/O otherwise.  If set for a cluster it generally means that the cluster
 404  * code could not find a valid copy to present.
 405  *
 406  * IO           - An I/O error occurred
 407  * CHECK        - I/O succeeded but did not match the check code
 408  * INCOMPLETE   - A cluster is not complete enough to use, or
 409  *                a chain cannot be loaded because its parent has an error.
 410  *
 411  * NOTE: API allows callers to check zero/non-zero to determine if an error
 412  *       condition exists.
 413  *
 414  * NOTE: Chain's data field is usually NULL on an IO error but not necessarily
 415  *       NULL on other errors.  Check chain->error, not chain->data.
 416  */
 417 #define HAMMER2_ERROR_NONE              0
 418 #define HAMMER2_ERROR_IO                1       /* device I/O error */
 419 #define HAMMER2_ERROR_CHECK             2       /* check code mismatch */
 420 #define HAMMER2_ERROR_INCOMPLETE        3       /* incomplete cluster */
 421 #define HAMMER2_ERROR_DEPTH             4       /* temporary depth limit */
 422
 423 /*
 424  * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
 425  *
 426  * NOTES:
 427  *      NOLOCK      - Input and output chains are referenced only and not
 428  *                    locked.  Output chain might be temporarily locked
 429  *                    internally.
 430  *
 431  *      NODATA      - Asks that the chain->data not be resolved in order
 432  *                    to avoid I/O.
 433  *
 434  *      NODIRECT    - Prevents a lookup of offset 0 in an inode from returning
 435  *                    the inode itself if the inode is in DIRECTDATA mode
 436  *                    (i.e. file is <= 512 bytes).  Used by the synchronization
 437  *                    code to prevent confusion.
 438  *
 439  *      SHARED      - The input chain is expected to be locked shared,
 440  *                    and the output chain is locked shared.
 441  *
 442  *      MATCHIND    - Allows an indirect block / freemap node to be returned
 443  *                    when the passed key range matches the radix.  Remember
 444  *                    that key_end is inclusive (e.g. {0x000,0xFFF},
 445  *                    not {0x000,0x1000}).
 446  *
 447  *                    (Cannot be used for remote or cluster ops).
 448  *
 449  *      ALLNODES    - Allows NULL focus.
 450  *
 451  *      ALWAYS      - Always resolve the data.  If ALWAYS and NODATA are both
 452  *                    missing, bulk file data is not resolved but inodes and
 453  *                    other meta-data will.
 454  *
 455  *      NOUNLOCK    - Used by hammer2_chain_next() to leave the lock on
 456  *                    the input chain intact.  The chain is still dropped.
 457  *                    This allows the caller to add a reference to the chain
 458  *                    and retain it in a locked state (used by the
 459  *                    XOP/feed/collect code).
 460  */
 461 #define HAMMER2_LOOKUP_NOLOCK           0x00000001      /* ref only */
 462 #define HAMMER2_LOOKUP_NODATA           0x00000002      /* data left NULL */
 463 #define HAMMER2_LOOKUP_NODIRECT         0x00000004      /* no offset=0 DD */
 464 #define HAMMER2_LOOKUP_SHARED           0x00000100
 465 #define HAMMER2_LOOKUP_MATCHIND         0x00000200      /* return all chains */
 466 #define HAMMER2_LOOKUP_ALLNODES         0x00000400      /* allow NULL focus */
 467 #define HAMMER2_LOOKUP_ALWAYS           0x00000800      /* resolve data */
 468 #define HAMMER2_LOOKUP_NOUNLOCK         0x00001000      /* leave lock intact */
 469
 470 /*
 471  * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
 472  *
 473  * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
 474  *       blocks in the INITIAL-create state.
 475  */
 476 #define HAMMER2_MODIFY_OPTDATA          0x00000002      /* data can be NULL */
 477 #define HAMMER2_MODIFY_NO_MODIFY_TID    0x00000004
 478 #define HAMMER2_MODIFY_UNUSED0008       0x00000008
 479
 480 /*
 481  * Flags passed to hammer2_chain_lock()
 482  *
 483  * NOTE: RDONLY is set to optimize cluster operations when *no* modifications
 484  *       will be made to either the cluster being locked or any underlying
 485  *       cluster.  It allows the cluster to lock and access data for a subset
 486  *       of available nodes instead of all available nodes.
 487  */
 488 #define HAMMER2_RESOLVE_NEVER           1
 489 #define HAMMER2_RESOLVE_MAYBE           2
 490 #define HAMMER2_RESOLVE_ALWAYS          3
 491 #define HAMMER2_RESOLVE_MASK            0x0F
 492
 493 #define HAMMER2_RESOLVE_SHARED          0x10    /* request shared lock */
 494 #define HAMMER2_RESOLVE_UNUSED20        0x20
 495 #define HAMMER2_RESOLVE_RDONLY          0x40    /* higher level op flag */
 496
 497 /*
 498  * Flags passed to hammer2_chain_delete()
 499  */
 500 #define HAMMER2_DELETE_PERMANENT        0x0001
 501
 502 /*
 503  * Flags passed to hammer2_chain_insert() or hammer2_chain_rename()
 504  */
 505 #define HAMMER2_INSERT_PFSROOT          0x0004
 506
 507 /*
 508  * Flags passed to hammer2_chain_delete_duplicate()
 509  */
 510 #define HAMMER2_DELDUP_RECORE           0x0001
 511
 512 /*
 513  * Cluster different types of storage together for allocations
 514  */
 515 #define HAMMER2_FREECACHE_INODE         0
 516 #define HAMMER2_FREECACHE_INDIR         1
 517 #define HAMMER2_FREECACHE_DATA          2
 518 #define HAMMER2_FREECACHE_UNUSED3       3
 519 #define HAMMER2_FREECACHE_TYPES         4
 520
 521 /*
 522  * hammer2_freemap_alloc() block preference
 523  */
 524 #define HAMMER2_OFF_NOPREF              ((hammer2_off_t)-1)
 525
 526 /*
 527  * BMAP read-ahead maximum parameters
 528  */
 529 #define HAMMER2_BMAP_COUNT              16      /* max bmap read-ahead */
 530 #define HAMMER2_BMAP_BYTES              (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
 531
 532 /*
 533  * hammer2_freemap_adjust()
 534  */
 535 #define HAMMER2_FREEMAP_DORECOVER       1
 536 #define HAMMER2_FREEMAP_DOMAYFREE       2
 537 #define HAMMER2_FREEMAP_DOREALFREE      3
 538
 539 /*
 540  * HAMMER2 cluster - A set of chains representing the same entity.
 541  *
 542  * hammer2_cluster typically represents a temporary set of representitive
 543  * chains.  The one exception is that a hammer2_cluster is embedded in
 544  * hammer2_inode.  This embedded cluster is ONLY used to track the
 545  * representitive chains and cannot be directly locked.
 546  *
 547  * A cluster is usually temporary (and thus per-thread) for locking purposes,
 548  * allowing us to embed the asynchronous storage required for cluster
 549  * operations in the cluster itself and adjust the state and status without
 550  * having to worry too much about SMP issues.
 551  *
 552  * The exception is the cluster embedded in the hammer2_inode structure.
 553  * This is used to cache the cluster state on an inode-by-inode basis.
 554  * Individual hammer2_chain structures not incorporated into clusters might
 555  * also stick around to cache miscellanious elements.
 556  *
 557  * Because the cluster is a 'working copy' and is usually subject to cluster
 558  * quorum rules, it is quite possible for us to end up with an insufficient
 559  * number of live chains to execute an operation.  If an insufficient number
 560  * of chains remain in a working copy, the operation may have to be
 561  * downgraded, retried, stall until the requisit number of chains are
 562  * available, or possibly even error out depending on the mount type.
 563  *
 564  * A cluster's focus is set when it is locked.  The focus can only be set
 565  * to a chain still part of the synchronized set.
 566  */
 567 #define HAMMER2_MAXCLUSTER      8
 568 #define HAMMER2_XOPFIFO         16
 569 #define HAMMER2_XOPFIFO_MASK    (HAMMER2_XOPFIFO - 1)
 570 #define HAMMER2_XOPGROUPS       16
 571 #define HAMMER2_XOPGROUPS_MASK  (HAMMER2_XOPGROUPS - 1)
 572 #define HAMMER2_XOPMASK_VOP     0x80000000U
 573
 574 struct hammer2_cluster_item {
 575         hammer2_chain_t         *chain;
 576         int                     cache_index;
 577         uint32_t                flags;
 578 };
 579
 580 typedef struct hammer2_cluster_item hammer2_cluster_item_t;
 581
 582 /*
 583  * INVALID      - Invalid for focus, i.e. not part of synchronized set.
 584  *                Once set, this bit is sticky across operations.
 585  *
 586  * FEMOD        - Indicates that front-end modifying operations can
 587  *                mess with this entry and MODSYNC will copy also
 588  *                effect it.
 589  */
 590 #define HAMMER2_CITEM_INVALID   0x00000001
 591 #define HAMMER2_CITEM_FEMOD     0x00000002
 592 #define HAMMER2_CITEM_NULL      0x00000004
 593
 594 struct hammer2_cluster {
 595         int                     refs;           /* track for deallocation */
 596         int                     ddflag;
 597         struct hammer2_pfs      *pmp;
 598         uint32_t                flags;
 599         int                     nchains;
 600         int                     error;          /* error code valid on lock */
 601         int                     focus_index;
 602         hammer2_iocb_t          iocb;
 603         hammer2_chain_t         *focus;         /* current focus (or mod) */
 604         hammer2_cluster_item_t  array[HAMMER2_MAXCLUSTER];
 605 };
 606
 607 typedef struct hammer2_cluster  hammer2_cluster_t;
 608
 609 /*
 610  * WRHARD       - Hard mounts can write fully synchronized
 611  * RDHARD       - Hard mounts can read fully synchronized
 612  * UNHARD       - Unsynchronized masters present
 613  * NOHARD       - No masters visible
 614  * WRSOFT       - Soft mounts can write to at least the SOFT_MASTER
 615  * RDSOFT       - Soft mounts can read from at least a SOFT_SLAVE
 616  * UNSOFT       - Unsynchronized slaves present
 617  * NOSOFT       - No slaves visible
 618  * RDSLAVE      - slaves are accessible (possibly unsynchronized or remote).
 619  * MSYNCED      - All masters are fully synchronized
 620  * SSYNCED      - All known local slaves are fully synchronized to masters
 621  *
 622  * All available masters are always incorporated.  All PFSs belonging to a
 623  * cluster (master, slave, copy, whatever) always try to synchronize the
 624  * total number of known masters in the PFSs root inode.
 625  *
 626  * A cluster might have access to many slaves, copies, or caches, but we
 627  * have a limited number of cluster slots.  Any such elements which are
 628  * directly mounted from block device(s) will always be incorporated.   Note
 629  * that SSYNCED only applies to such elements which are directly mounted,
 630  * not to any remote slaves, copies, or caches that could be available.  These
 631  * bits are used to monitor and drive our synchronization threads.
 632  *
 633  * When asking the question 'is any data accessible at all', then a simple
 634  * test against (RDHARD|RDSOFT|RDSLAVE) gives you the answer.  If any of
 635  * these bits are set the object can be read with certain caveats:
 636  * RDHARD - no caveats.  RDSOFT - authoritative but might not be synchronized.
 637  * and RDSLAVE - not authoritative, has some data but it could be old or
 638  * incomplete.
 639  *
 640  * When both soft and hard mounts are available, data will be read and written
 641  * via the soft mount only.  But all might be in the cluster because
 642  * background synchronization threads still need to do their work.
 643  */
 644 #define HAMMER2_CLUSTER_INODE   0x00000001      /* embedded in inode struct */
 645 #define HAMMER2_CLUSTER_UNUSED2 0x00000002
 646 #define HAMMER2_CLUSTER_LOCKED  0x00000004      /* cluster lks not recursive */
 647 #define HAMMER2_CLUSTER_WRHARD  0x00000100      /* hard-mount can write */
 648 #define HAMMER2_CLUSTER_RDHARD  0x00000200      /* hard-mount can read */
 649 #define HAMMER2_CLUSTER_UNHARD  0x00000400      /* unsynchronized masters */
 650 #define HAMMER2_CLUSTER_NOHARD  0x00000800      /* no masters visible */
 651 #define HAMMER2_CLUSTER_WRSOFT  0x00001000      /* soft-mount can write */
 652 #define HAMMER2_CLUSTER_RDSOFT  0x00002000      /* soft-mount can read */
 653 #define HAMMER2_CLUSTER_UNSOFT  0x00004000      /* unsynchronized slaves */
 654 #define HAMMER2_CLUSTER_NOSOFT  0x00008000      /* no slaves visible */
 655 #define HAMMER2_CLUSTER_MSYNCED 0x00010000      /* all masters synchronized */
 656 #define HAMMER2_CLUSTER_SSYNCED 0x00020000      /* known slaves synchronized */
 657
 658 #define HAMMER2_CLUSTER_ANYDATA ( HAMMER2_CLUSTER_RDHARD |      \
 659                                   HAMMER2_CLUSTER_RDSOFT |      \
 660                                   HAMMER2_CLUSTER_RDSLAVE)
 661
 662 #define HAMMER2_CLUSTER_RDOK    ( HAMMER2_CLUSTER_RDHARD |      \
 663                                   HAMMER2_CLUSTER_RDSOFT)
 664
 665 #define HAMMER2_CLUSTER_WROK    ( HAMMER2_CLUSTER_WRHARD |      \
 666                                   HAMMER2_CLUSTER_WRSOFT)
 667
 668 #define HAMMER2_CLUSTER_ZFLAGS  ( HAMMER2_CLUSTER_WRHARD |      \
 669                                   HAMMER2_CLUSTER_RDHARD |      \
 670                                   HAMMER2_CLUSTER_WRSOFT |      \
 671                                   HAMMER2_CLUSTER_RDSOFT |      \
 672                                   HAMMER2_CLUSTER_MSYNCED |     \
 673                                   HAMMER2_CLUSTER_SSYNCED)
 674
 675 /*
 676  * Helper functions (cluster must be locked for flags to be valid).
 677  */
 678 static __inline
 679 int
 680 hammer2_cluster_rdok(hammer2_cluster_t *cluster)
 681 {
 682         return (cluster->flags & HAMMER2_CLUSTER_RDOK);
 683 }
 684
 685 static __inline
 686 int
 687 hammer2_cluster_wrok(hammer2_cluster_t *cluster)
 688 {
 689         return (cluster->flags & HAMMER2_CLUSTER_WROK);
 690 }
 691
 692 RB_HEAD(hammer2_inode_tree, hammer2_inode);
 693
 694 /*
 695  * A hammer2 inode.
 696  *
 697  * NOTE: The inode-embedded cluster is never used directly for I/O (since
 698  *       it may be shared).  Instead it will be replicated-in and synchronized
 699  *       back out if changed.
 700  */
 701 struct hammer2_inode {
 702         RB_ENTRY(hammer2_inode) rbnode;         /* inumber lookup (HL) */
 703         hammer2_mtx_t           lock;           /* inode lock */
 704         struct hammer2_pfs      *pmp;           /* PFS mount */
 705         struct hammer2_inode    *pip;           /* parent inode */
 706         struct vnode            *vp;
 707         struct spinlock         cluster_spin;   /* update cluster */
 708         hammer2_cluster_t       cluster;
 709         struct lockf            advlock;
 710         u_int                   flags;
 711         u_int                   refs;           /* +vpref, +flushref */
 712         uint8_t                 comp_heuristic;
 713         hammer2_inode_meta_t    meta;           /* copy of meta-data */
 714         hammer2_off_t           osize;
 715 };
 716
 717 typedef struct hammer2_inode hammer2_inode_t;
 718
 719 /*
 720  * MODIFIED     - Inode is in a modified state, ip->meta may have changes.
 721  * RESIZED      - Inode truncated (any) or inode extended beyond
 722  *                EMBEDDED_BYTES.
 723  */
 724 #define HAMMER2_INODE_MODIFIED          0x0001
 725 #define HAMMER2_INODE_SROOT             0x0002  /* kmalloc special case */
 726 #define HAMMER2_INODE_RENAME_INPROG     0x0004
 727 #define HAMMER2_INODE_ONRBTREE          0x0008
 728 #define HAMMER2_INODE_RESIZED           0x0010  /* requires inode_fsync */
 729 #define HAMMER2_INODE_ISDELETED         0x0020  /* deleted, not in ihidden */
 730 #define HAMMER2_INODE_ISUNLINKED        0x0040
 731 #define HAMMER2_INODE_METAGOOD          0x0080  /* inode meta-data good */
 732
 733 int hammer2_inode_cmp(hammer2_inode_t *ip1, hammer2_inode_t *ip2);
 734 RB_PROTOTYPE2(hammer2_inode_tree, hammer2_inode, rbnode, hammer2_inode_cmp,
 735                 hammer2_tid_t);
 736
 737 /*
 738  * inode-unlink side-structure
 739  */
 740 struct hammer2_inode_unlink {
 741         TAILQ_ENTRY(hammer2_inode_unlink) entry;
 742         hammer2_inode_t *ip;
 743 };
 744 TAILQ_HEAD(h2_unlk_list, hammer2_inode_unlink);
 745
 746 typedef struct hammer2_inode_unlink hammer2_inode_unlink_t;
 747
 748 /*
 749  * Transaction management sub-structure under hammer2_pfs
 750  */
 751 struct hammer2_trans {
 752         uint32_t                flags;
 753         uint32_t                sync_wait;
 754 };
 755
 756 typedef struct hammer2_trans hammer2_trans_t;
 757
 758 #define HAMMER2_TRANS_ISFLUSH           0x80000000      /* flush code */
 759 #define HAMMER2_TRANS_BUFCACHE          0x40000000      /* bio strategy */
 760 #define HAMMER2_TRANS_PREFLUSH          0x20000000      /* preflush state */
 761 #define HAMMER2_TRANS_FPENDING          0x10000000      /* flush pending */
 762 #define HAMMER2_TRANS_WAITING           0x08000000      /* someone waiting */
 763 #define HAMMER2_TRANS_MASK              0x00FFFFFF      /* count mask */
 764
 765 #define HAMMER2_FREEMAP_HEUR_NRADIX     4       /* pwr 2 PBUFRADIX-MINIORADIX */
 766 #define HAMMER2_FREEMAP_HEUR_TYPES      8
 767 #define HAMMER2_FREEMAP_HEUR            (HAMMER2_FREEMAP_HEUR_NRADIX * \
 768                                          HAMMER2_FREEMAP_HEUR_TYPES)
 769
 770 #define HAMMER2_FLUSH_TOP               0x0001
 771 #define HAMMER2_FLUSH_ALL               0x0002
 772
 773
 774 /*
 775  * Hammer2 support thread element.
 776  *
 777  * Potentially many support threads can hang off of hammer2, primarily
 778  * off the hammer2_pfs structure.  Typically:
 779  *
 780  * td x Nodes                   A synchronization thread for each node.
 781  * td x Nodes x workers         Worker threads for frontend operations.
 782  * td x 1                       Bioq thread for logical buffer writes.
 783  *
 784  * In addition, the synchronization thread(s) associated with the
 785  * super-root PFS (spmp) for a node is responsible for automatic bulkfree
 786  * and dedup scans.
 787  */
 788 struct hammer2_thread {
 789         struct hammer2_pfs *pmp;
 790         hammer2_xop_list_t *xopq;       /* points into pmp->xopq[] */
 791         thread_t        td;
 792         uint32_t        flags;
 793         int             depth;
 794         int             clindex;        /* cluster element index */
 795         int             repidx;
 796         struct lock     lk;             /* thread control lock */
 797 };
 798
 799 typedef struct hammer2_thread hammer2_thread_t;
 800
 801 #define HAMMER2_THREAD_UNMOUNTING       0x0001  /* unmount request */
 802 #define HAMMER2_THREAD_DEV              0x0002  /* related to dev, not pfs */
 803 #define HAMMER2_THREAD_UNUSED04         0x0004
 804 #define HAMMER2_THREAD_REMASTER         0x0008  /* remaster request */
 805 #define HAMMER2_THREAD_STOP             0x0010  /* exit request */
 806 #define HAMMER2_THREAD_FREEZE           0x0020  /* force idle */
 807 #define HAMMER2_THREAD_FROZEN           0x0040  /* restart */
 808
 809
 810 /*
 811  * hammer2_xop - container for VOP/XOP operation (allocated, not on stack).
 812  *
 813  * This structure is used to distribute a VOP operation across multiple
 814  * nodes.  It provides a rendezvous for concurrent node execution and
 815  * can be detached from the frontend operation to allow the frontend to
 816  * return early.
 817  *
 818  * This structure also sequences operations on up to three inodes.
 819  */
 820 typedef void (*hammer2_xop_func_t)(union hammer2_xop *xop, int clidx);
 821
 822 typedef struct hammer2_xop_fifo {
 823         TAILQ_ENTRY(hammer2_xop_head) entry;
 824         hammer2_chain_t         *array[HAMMER2_XOPFIFO];
 825         int                     errors[HAMMER2_XOPFIFO];
 826         int                     ri;
 827         int                     wi;
 828         int                     flags;
 829 } hammer2_xop_fifo_t;
 830
 831 #define HAMMER2_XOP_FIFO_RUN    0x0001
 832
 833 struct hammer2_xop_head {
 834         hammer2_xop_func_t      func;
 835         hammer2_tid_t           mtid;
 836         struct hammer2_inode    *ip1;
 837         struct hammer2_inode    *ip2;
 838         struct hammer2_inode    *ip3;
 839         uint32_t                check_counter;
 840         uint32_t                run_mask;
 841         uint32_t                chk_mask;
 842         int                     state;
 843         int                     error;
 844         hammer2_key_t           collect_key;
 845         char                    *name1;
 846         size_t                  name1_len;
 847         char                    *name2;
 848         size_t                  name2_len;
 849         hammer2_xop_fifo_t      collect[HAMMER2_MAXCLUSTER];
 850         hammer2_cluster_t       cluster;        /* help collections */
 851 };
 852
 853 typedef struct hammer2_xop_head hammer2_xop_head_t;
 854
 855 struct hammer2_xop_ipcluster {
 856         hammer2_xop_head_t      head;
 857 };
 858
 859 struct hammer2_xop_strategy {
 860         hammer2_xop_head_t      head;
 861         hammer2_key_t           lbase;
 862         int                     finished;
 863         hammer2_mtx_t           lock;
 864         struct bio              *bio;
 865 };
 866
 867 struct hammer2_xop_readdir {
 868         hammer2_xop_head_t      head;
 869         hammer2_key_t           lkey;
 870 };
 871
 872 struct hammer2_xop_nresolve {
 873         hammer2_xop_head_t      head;
 874         hammer2_key_t           lhc;    /* if name is NULL used lhc */
 875 };
 876
 877 struct hammer2_xop_nlink {
 878         hammer2_xop_head_t      head;
 879 };
 880
 881 struct hammer2_xop_unlink {
 882         hammer2_xop_head_t      head;
 883         int                     isdir;
 884         int                     dopermanent;
 885 };
 886
 887 struct hammer2_xop_nrename {
 888         hammer2_xop_head_t      head;
 889         hammer2_tid_t           lhc;
 890         int                     ip_key;
 891 };
 892
 893 struct hammer2_xop_scanlhc {
 894         hammer2_xop_head_t      head;
 895         hammer2_key_t           lhc;
 896 };
 897
 898 struct hammer2_xop_scanall {
 899         hammer2_xop_head_t      head;
 900         hammer2_key_t           key_beg;        /* inclusive */
 901         hammer2_key_t           key_end;        /* inclusive */
 902 };
 903
 904 struct hammer2_xop_lookup {
 905         hammer2_xop_head_t      head;
 906         hammer2_key_t           lhc;
 907 };
 908
 909 struct hammer2_xop_create {
 910         hammer2_xop_head_t      head;
 911         hammer2_inode_meta_t    meta;           /* initial metadata */
 912         hammer2_key_t           lhc;
 913         int                     flags;
 914 };
 915
 916 struct hammer2_xop_destroy {
 917         hammer2_xop_head_t      head;
 918 };
 919
 920 struct hammer2_xop_fsync {
 921         hammer2_xop_head_t      head;
 922         hammer2_inode_meta_t    meta;
 923         hammer2_off_t           osize;
 924         u_int                   ipflags;
 925         int                     clear_directdata;
 926 };
 927
 928 struct hammer2_xop_unlinkall {
 929         hammer2_xop_head_t      head;
 930         hammer2_key_t           key_beg;
 931         hammer2_key_t           key_end;
 932 };
 933
 934 struct hammer2_xop_connect {
 935         hammer2_xop_head_t      head;
 936         hammer2_key_t           lhc;
 937 };
 938
 939 struct hammer2_xop_flush {
 940         hammer2_xop_head_t      head;
 941 };
 942
 943 typedef struct hammer2_xop_readdir hammer2_xop_readdir_t;
 944 typedef struct hammer2_xop_nresolve hammer2_xop_nresolve_t;
 945 typedef struct hammer2_xop_nlink hammer2_xop_nlink_t;
 946 typedef struct hammer2_xop_unlink hammer2_xop_unlink_t;
 947 typedef struct hammer2_xop_nrename hammer2_xop_nrename_t;
 948 typedef struct hammer2_xop_ipcluster hammer2_xop_ipcluster_t;
 949 typedef struct hammer2_xop_strategy hammer2_xop_strategy_t;
 950 typedef struct hammer2_xop_create hammer2_xop_create_t;
 951 typedef struct hammer2_xop_destroy hammer2_xop_destroy_t;
 952 typedef struct hammer2_xop_fsync hammer2_xop_fsync_t;
 953 typedef struct hammer2_xop_unlinkall hammer2_xop_unlinkall_t;
 954 typedef struct hammer2_xop_scanlhc hammer2_xop_scanlhc_t;
 955 typedef struct hammer2_xop_scanall hammer2_xop_scanall_t;
 956 typedef struct hammer2_xop_lookup hammer2_xop_lookup_t;
 957 typedef struct hammer2_xop_connect hammer2_xop_connect_t;
 958 typedef struct hammer2_xop_flush hammer2_xop_flush_t;
 959
 960 union hammer2_xop {
 961         hammer2_xop_head_t      head;
 962         hammer2_xop_ipcluster_t xop_ipcluster;
 963         hammer2_xop_readdir_t   xop_readdir;
 964         hammer2_xop_nresolve_t  xop_nresolve;
 965         hammer2_xop_nlink_t     xop_nlink;
 966         hammer2_xop_unlink_t    xop_unlink;
 967         hammer2_xop_nrename_t   xop_nrename;
 968         hammer2_xop_strategy_t  xop_strategy;
 969         hammer2_xop_create_t    xop_create;
 970         hammer2_xop_destroy_t   xop_destroy;
 971         hammer2_xop_fsync_t     xop_fsync;
 972         hammer2_xop_unlinkall_t xop_unlinkall;
 973         hammer2_xop_scanlhc_t   xop_scanlhc;
 974         hammer2_xop_scanall_t   xop_scanall;
 975         hammer2_xop_lookup_t    xop_lookup;
 976         hammer2_xop_flush_t     xop_flush;
 977         hammer2_xop_connect_t   xop_connect;
 978 };
 979
 980 typedef union hammer2_xop hammer2_xop_t;
 981
 982 /*
 983  * hammer2_xop_group - Manage XOP support threads.
 984  */
 985 struct hammer2_xop_group {
 986         hammer2_thread_t        thrs[HAMMER2_MAXCLUSTER];
 987 };
 988
 989 typedef struct hammer2_xop_group hammer2_xop_group_t;
 990
 991 /*
 992  * flags to hammer2_xop_collect()
 993  */
 994 #define HAMMER2_XOP_COLLECT_NOWAIT      0x00000001
 995 #define HAMMER2_XOP_COLLECT_WAITALL     0x00000002
 996
 997 /*
 998  * flags to hammer2_xop_alloc()
 999  *
1000  * MODIFYING    - This is a modifying transaction, allocate a mtid.
1001  */
1002 #define HAMMER2_XOP_MODIFYING           0x00000001
1003
1004 /*
1005  * Global (per partition) management structure, represents a hard block
1006  * device.  Typically referenced by hammer2_chain structures when applicable.
1007  * Typically not used for network-managed elements.
1008  *
1009  * Note that a single hammer2_dev can be indirectly tied to multiple system
1010  * mount points.  There is no direct relationship.  System mounts are
1011  * per-cluster-id, not per-block-device, and a single hard mount might contain
1012  * many PFSs and those PFSs might combine together in various ways to form
1013  * the set of available clusters.
1014  */
1015 struct hammer2_dev {
1016         struct vnode    *devvp;         /* device vnode */
1017         int             ronly;          /* read-only mount */
1018         int             mount_count;    /* number of actively mounted PFSs */
1019         TAILQ_ENTRY(hammer2_dev) mntentry; /* hammer2_mntlist */
1020
1021         struct malloc_type *mchain;
1022         int             nipstacks;
1023         int             maxipstacks;
1024         kdmsg_iocom_t   iocom;          /* volume-level dmsg interface */
1025         struct spinlock io_spin;        /* iotree access */
1026         struct hammer2_io_tree iotree;
1027         int             iofree_count;
1028         hammer2_chain_t vchain;         /* anchor chain (topology) */
1029         hammer2_chain_t fchain;         /* anchor chain (freemap) */
1030         struct spinlock list_spin;
1031         struct h2_flush_list    flushq; /* flush seeds */
1032         struct hammer2_pfs *spmp;       /* super-root pmp for transactions */
1033         struct lock     bulklk;         /* bulkfree lock */
1034         struct lock     vollk;          /* lockmgr lock */
1035         hammer2_off_t   heur_freemap[HAMMER2_FREEMAP_HEUR];
1036         int             volhdrno;       /* last volhdrno written */
1037         char            devrepname[64]; /* for kprintf */
1038         hammer2_volume_data_t voldata;
1039         hammer2_volume_data_t volsync;  /* synchronized voldata */
1040 };
1041
1042 typedef struct hammer2_dev hammer2_dev_t;
1043
1044 /*
1045  * Helper functions (cluster must be locked for flags to be valid).
1046  */
1047 static __inline
1048 int
1049 hammer2_chain_rdok(hammer2_chain_t *chain)
1050 {
1051         return (chain->error == 0);
1052 }
1053
1054 static __inline
1055 int
1056 hammer2_chain_wrok(hammer2_chain_t *chain)
1057 {
1058         return (chain->error == 0 && chain->hmp->ronly == 0);
1059 }
1060
1061 /*
1062  * Per-cluster management structure.  This structure will be tied to a
1063  * system mount point if the system is mounting the PFS, but is also used
1064  * to manage clusters encountered during the super-root scan or received
1065  * via LNK_SPANs that might not be mounted.
1066  *
1067  * This structure is also used to represent the super-root that hangs off
1068  * of a hard mount point.  The super-root is not really a cluster element.
1069  * In this case the spmp_hmp field will be non-NULL.  It's just easier to do
1070  * this than to special case super-root manipulation in the hammer2_chain*
1071  * code as being only hammer2_dev-related.
1072  *
1073  * pfs_mode and pfs_nmasters are rollup fields which critically describes
1074  * how elements of the cluster act on the cluster.  pfs_mode is only applicable
1075  * when a PFS is mounted by the system.  pfs_nmasters is our best guess as to
1076  * how many masters have been configured for a cluster and is always
1077  * applicable.  pfs_types[] is an array with 1:1 correspondance to the
1078  * iroot cluster and describes the PFS types of the nodes making up the
1079  * cluster.
1080  *
1081  * WARNING! Portions of this structure have deferred initialization.  In
1082  *          particular, if not mounted there will be no ihidden or wthread.
1083  *          umounted network PFSs will also be missing iroot and numerous
1084  *          other fields will not be initialized prior to mount.
1085  *
1086  *          Synchronization threads are chain-specific and only applicable
1087  *          to local hard PFS entries.  A hammer2_pfs structure may contain
1088  *          more than one when multiple hard PFSs are present on the local
1089  *          machine which require synchronization monitoring.  Most PFSs
1090  *          (such as snapshots) are 1xMASTER PFSs which do not need a
1091  *          synchronization thread.
1092  *
1093  * WARNING! The chains making up pfs->iroot's cluster are accounted for in
1094  *          hammer2_dev->mount_count when the pfs is associated with a mount
1095  *          point.
1096  */
1097 struct hammer2_pfs {
1098         struct mount            *mp;
1099         TAILQ_ENTRY(hammer2_pfs) mntentry;      /* hammer2_pfslist */
1100         uuid_t                  pfs_clid;
1101         hammer2_dev_t           *spmp_hmp;      /* only if super-root pmp */
1102         hammer2_inode_t         *iroot;         /* PFS root inode */
1103         hammer2_inode_t         *ihidden;       /* PFS hidden directory */
1104         uint8_t                 pfs_types[HAMMER2_MAXCLUSTER];
1105         char                    *pfs_names[HAMMER2_MAXCLUSTER];
1106         hammer2_dev_t           *pfs_hmps[HAMMER2_MAXCLUSTER];
1107         hammer2_trans_t         trans;
1108         struct lock             lock;           /* PFS lock for certain ops */
1109         struct netexport        export;         /* nfs export */
1110         int                     ronly;          /* read-only mount */
1111         struct malloc_type      *minode;
1112         struct malloc_type      *mmsg;
1113         struct spinlock         inum_spin;      /* inumber lookup */
1114         struct hammer2_inode_tree inum_tree;    /* (not applicable to spmp) */
1115         hammer2_tid_t           modify_tid;     /* modify transaction id */
1116         hammer2_tid_t           inode_tid;      /* inode allocator */
1117         uint8_t                 pfs_nmasters;   /* total masters */
1118         uint8_t                 pfs_mode;       /* operating mode PFSMODE */
1119         uint8_t                 unused01;
1120         uint8_t                 unused02;
1121         int                     xop_iterator;
1122         long                    inmem_inodes;
1123         uint32_t                inmem_dirty_chains;
1124         int                     count_lwinprog; /* logical write in prog */
1125         struct spinlock         list_spin;
1126         struct h2_unlk_list     unlinkq;        /* last-close unlink */
1127         hammer2_thread_t        sync_thrs[HAMMER2_MAXCLUSTER];
1128         uint32_t                cluster_flags;  /* cached cluster flags */
1129         int                     has_xop_threads;
1130         struct spinlock         xop_spin;       /* xop sequencer */
1131         hammer2_xop_group_t     xop_groups[HAMMER2_XOPGROUPS];
1132         hammer2_xop_list_t      xopq[HAMMER2_MAXCLUSTER];
1133 };
1134
1135 typedef struct hammer2_pfs hammer2_pfs_t;
1136
1137 #define HAMMER2_DIRTYCHAIN_WAITING      0x80000000
1138 #define HAMMER2_DIRTYCHAIN_MASK         0x7FFFFFFF
1139
1140 #define HAMMER2_LWINPROG_WAITING        0x80000000
1141 #define HAMMER2_LWINPROG_WAITING0       0x40000000
1142 #define HAMMER2_LWINPROG_MASK           0x3FFFFFFF
1143
1144 /*
1145  * hammer2_cluster_check
1146  */
1147 #define HAMMER2_CHECK_NULL      0x00000001
1148
1149 /*
1150  * Bulkscan
1151  */
1152 #define HAMMER2_BULK_ABORT      0x00000001
1153
1154 /*
1155  * Misc
1156  */
1157 #if defined(_KERNEL)
1158
1159 MALLOC_DECLARE(M_HAMMER2);
1160
1161 #define VTOI(vp)        ((hammer2_inode_t *)(vp)->v_data)
1162 #define ITOV(ip)        ((ip)->vp)
1163
1164 /*
1165  * Currently locked chains retain the locked buffer cache buffer for
1166  * indirect blocks, and indirect blocks can be one of two sizes.  The
1167  * device buffer has to match the case to avoid deadlocking recursive
1168  * chains that might otherwise try to access different offsets within
1169  * the same device buffer.
1170  */
1171 static __inline
1172 int
1173 hammer2_devblkradix(int radix)
1174 {
1175 #if 0
1176         if (radix <= HAMMER2_LBUFRADIX) {
1177                 return (HAMMER2_LBUFRADIX);
1178         } else {
1179                 return (HAMMER2_PBUFRADIX);
1180         }
1181 #endif
1182         return (HAMMER2_PBUFRADIX);
1183 }
1184
1185 /*
1186  * XXX almost time to remove this.  DIO uses PBUFSIZE exclusively now.
1187  */
1188 static __inline
1189 size_t
1190 hammer2_devblksize(size_t bytes)
1191 {
1192 #if 0
1193         if (bytes <= HAMMER2_LBUFSIZE) {
1194                 return(HAMMER2_LBUFSIZE);
1195         } else {
1196                 KKASSERT(bytes <= HAMMER2_PBUFSIZE &&
1197                          (bytes ^ (bytes - 1)) == ((bytes << 1) - 1));
1198                 return (HAMMER2_PBUFSIZE);
1199         }
1200 #endif
1201         return (HAMMER2_PBUFSIZE);
1202 }
1203
1204
1205 static __inline
1206 hammer2_pfs_t *
1207 MPTOPMP(struct mount *mp)
1208 {
1209         return ((hammer2_pfs_t *)mp->mnt_data);
1210 }
1211
1212 #define LOCKSTART       int __nlocks = curthread->td_locks
1213 #define LOCKENTER       (++curthread->td_locks)
1214 #define LOCKEXIT        (--curthread->td_locks)
1215 #define LOCKSTOP        KKASSERT(curthread->td_locks == __nlocks)
1216
1217 extern struct vop_ops hammer2_vnode_vops;
1218 extern struct vop_ops hammer2_spec_vops;
1219 extern struct vop_ops hammer2_fifo_vops;
1220
1221 extern int hammer2_debug;
1222 extern int hammer2_cluster_enable;
1223 extern int hammer2_hardlink_enable;
1224 extern int hammer2_flush_pipe;
1225 extern int hammer2_synchronous_flush;
1226 extern int hammer2_dio_count;
1227 extern long hammer2_limit_dirty_chains;
1228 extern long hammer2_iod_file_read;
1229 extern long hammer2_iod_meta_read;
1230 extern long hammer2_iod_indr_read;
1231 extern long hammer2_iod_fmap_read;
1232 extern long hammer2_iod_volu_read;
1233 extern long hammer2_iod_file_write;
1234 extern long hammer2_iod_meta_write;
1235 extern long hammer2_iod_indr_write;
1236 extern long hammer2_iod_fmap_write;
1237 extern long hammer2_iod_volu_write;
1238 extern long hammer2_ioa_file_read;
1239 extern long hammer2_ioa_meta_read;
1240 extern long hammer2_ioa_indr_read;
1241 extern long hammer2_ioa_fmap_read;
1242 extern long hammer2_ioa_volu_read;
1243 extern long hammer2_ioa_file_write;
1244 extern long hammer2_ioa_meta_write;
1245 extern long hammer2_ioa_indr_write;
1246 extern long hammer2_ioa_fmap_write;
1247 extern long hammer2_ioa_volu_write;
1248
1249 extern struct objcache *cache_buffer_read;
1250 extern struct objcache *cache_buffer_write;
1251 extern struct objcache *cache_xops;
1252
1253 /*
1254  * hammer2_subr.c
1255  */
1256 #define hammer2_icrc32(buf, size)       iscsi_crc32((buf), (size))
1257 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
1258
1259 int hammer2_signal_check(time_t *timep);
1260 const char *hammer2_error_str(int error);
1261
1262 void hammer2_inode_lock(hammer2_inode_t *ip, int how);
1263 void hammer2_inode_unlock(hammer2_inode_t *ip);
1264 hammer2_chain_t *hammer2_inode_chain(hammer2_inode_t *ip, int clindex, int how);
1265 hammer2_chain_t *hammer2_inode_chain_and_parent(hammer2_inode_t *ip,
1266                         int clindex, hammer2_chain_t **parentp, int how);
1267 hammer2_mtx_state_t hammer2_inode_lock_temp_release(hammer2_inode_t *ip);
1268 void hammer2_inode_lock_temp_restore(hammer2_inode_t *ip,
1269                         hammer2_mtx_state_t ostate);
1270 int hammer2_inode_lock_upgrade(hammer2_inode_t *ip);
1271 void hammer2_inode_lock_downgrade(hammer2_inode_t *ip, int);
1272
1273 void hammer2_dev_exlock(hammer2_dev_t *hmp);
1274 void hammer2_dev_shlock(hammer2_dev_t *hmp);
1275 void hammer2_dev_unlock(hammer2_dev_t *hmp);
1276
1277 int hammer2_get_dtype(const hammer2_inode_data_t *ipdata);
1278 int hammer2_get_vtype(uint8_t type);
1279 u_int8_t hammer2_get_obj_type(enum vtype vtype);
1280 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
1281 u_int64_t hammer2_timespec_to_time(const struct timespec *ts);
1282 u_int32_t hammer2_to_unix_xid(const uuid_t *uuid);
1283 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
1284 void hammer2_trans_manage_init(hammer2_pfs_t *pmp);
1285
1286 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
1287 int hammer2_getradix(size_t bytes);
1288
1289 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
1290                         hammer2_key_t *lbasep, hammer2_key_t *leofp);
1291 int hammer2_calc_physical(hammer2_inode_t *ip, hammer2_key_t lbase);
1292 void hammer2_update_time(uint64_t *timep);
1293 void hammer2_adjreadcounter(hammer2_blockref_t *bref, size_t bytes);
1294
1295 /*
1296  * hammer2_inode.c
1297  */
1298 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
1299 hammer2_inode_t *hammer2_inode_lookup(hammer2_pfs_t *pmp,
1300                         hammer2_tid_t inum);
1301 hammer2_inode_t *hammer2_inode_get(hammer2_pfs_t *pmp, hammer2_inode_t *dip,
1302                         hammer2_cluster_t *cluster, int idx);
1303 void hammer2_inode_free(hammer2_inode_t *ip);
1304 void hammer2_inode_ref(hammer2_inode_t *ip);
1305 void hammer2_inode_drop(hammer2_inode_t *ip);
1306 void hammer2_inode_repoint(hammer2_inode_t *ip, hammer2_inode_t *pip,
1307                         hammer2_cluster_t *cluster);
1308 void hammer2_inode_repoint_one(hammer2_inode_t *ip, hammer2_cluster_t *cluster,
1309                         int idx);
1310 void hammer2_inode_modify(hammer2_inode_t *ip);
1311 void hammer2_inode_run_unlinkq(hammer2_pfs_t *pmp);
1312
1313 hammer2_inode_t *hammer2_inode_create(hammer2_inode_t *dip,
1314                         struct vattr *vap, struct ucred *cred,
1315                         const uint8_t *name, size_t name_len, hammer2_key_t lhc,
1316                         hammer2_key_t inum, uint8_t type, uint8_t target_type,
1317                         int flags, int *errorp);
1318 int hammer2_inode_connect(hammer2_inode_t *dip, hammer2_inode_t *ip,
1319                         const char *name, size_t name_len,
1320                         hammer2_key_t lhc);
1321 hammer2_inode_t *hammer2_inode_common_parent(hammer2_inode_t *fdip,
1322                         hammer2_inode_t *tdip);
1323 void hammer2_inode_chain_sync(hammer2_inode_t *ip);
1324 int hammer2_inode_unlink_finisher(hammer2_inode_t *ip, int isopen);
1325 void hammer2_inode_install_hidden(hammer2_pfs_t *pmp);
1326
1327 /*
1328  * hammer2_chain.c
1329  */
1330 void hammer2_voldata_lock(hammer2_dev_t *hmp);
1331 void hammer2_voldata_unlock(hammer2_dev_t *hmp);
1332 void hammer2_voldata_modify(hammer2_dev_t *hmp);
1333 hammer2_chain_t *hammer2_chain_alloc(hammer2_dev_t *hmp,
1334                                 hammer2_pfs_t *pmp,
1335                                 hammer2_blockref_t *bref);
1336 void hammer2_chain_core_init(hammer2_chain_t *chain);
1337 void hammer2_chain_ref(hammer2_chain_t *chain);
1338 void hammer2_chain_drop(hammer2_chain_t *chain);
1339 void hammer2_chain_lock(hammer2_chain_t *chain, int how);
1340 void hammer2_chain_load_data(hammer2_chain_t *chain);
1341 const hammer2_media_data_t *hammer2_chain_rdata(hammer2_chain_t *chain);
1342 hammer2_media_data_t *hammer2_chain_wdata(hammer2_chain_t *chain);
1343 int hammer2_chain_snapshot(hammer2_chain_t *chain, hammer2_ioc_pfs_t *pmp,
1344                                 hammer2_tid_t mtid);
1345
1346 int hammer2_chain_hardlink_find(hammer2_inode_t *dip,
1347                                 hammer2_chain_t **parentp,
1348                                 hammer2_chain_t **chainp,
1349                                 int flags);
1350 void hammer2_chain_modify(hammer2_chain_t *chain,
1351                                 hammer2_tid_t mtid, int flags);
1352 void hammer2_chain_modify_ip(hammer2_inode_t *ip, hammer2_chain_t *chain,
1353                                 hammer2_tid_t mtid, int flags);
1354 void hammer2_chain_resize(hammer2_inode_t *ip, hammer2_chain_t *parent,
1355                                 hammer2_chain_t *chain,
1356                                 hammer2_tid_t mtid, int nradix, int flags);
1357 void hammer2_chain_unlock(hammer2_chain_t *chain);
1358 void hammer2_chain_wait(hammer2_chain_t *chain);
1359 hammer2_chain_t *hammer2_chain_get(hammer2_chain_t *parent, int generation,
1360                                 hammer2_blockref_t *bref);
1361 hammer2_chain_t *hammer2_chain_lookup_init(hammer2_chain_t *parent, int flags);
1362 void hammer2_chain_lookup_done(hammer2_chain_t *parent);
1363 hammer2_chain_t *hammer2_chain_getparent(hammer2_chain_t **parentp, int how);
1364 hammer2_chain_t *hammer2_chain_lookup(hammer2_chain_t **parentp,
1365                                 hammer2_key_t *key_nextp,
1366                                 hammer2_key_t key_beg, hammer2_key_t key_end,
1367                                 int *cache_indexp, int flags);
1368 hammer2_chain_t *hammer2_chain_next(hammer2_chain_t **parentp,
1369                                 hammer2_chain_t *chain,
1370                                 hammer2_key_t *key_nextp,
1371                                 hammer2_key_t key_beg, hammer2_key_t key_end,
1372                                 int *cache_indexp, int flags);
1373 hammer2_chain_t *hammer2_chain_scan(hammer2_chain_t *parent,
1374                                 hammer2_chain_t *chain,
1375                                 int *cache_indexp, int flags);
1376
1377 int hammer2_chain_create(hammer2_chain_t **parentp,
1378                                 hammer2_chain_t **chainp, hammer2_pfs_t *pmp,
1379                                 hammer2_key_t key, int keybits,
1380                                 int type, size_t bytes,
1381                                 hammer2_tid_t mtid, int flags);
1382 void hammer2_chain_rename(hammer2_blockref_t *bref,
1383                                 hammer2_chain_t **parentp,
1384                                 hammer2_chain_t *chain,
1385                                 hammer2_tid_t mtid, int flags);
1386 void hammer2_chain_delete(hammer2_chain_t *parent, hammer2_chain_t *chain,
1387                                 hammer2_tid_t mtid, int flags);
1388 void hammer2_chain_setflush(hammer2_chain_t *chain);
1389 void hammer2_chain_countbrefs(hammer2_chain_t *chain,
1390                                 hammer2_blockref_t *base, int count);
1391 hammer2_chain_t *hammer2_chain_bulksnap(hammer2_chain_t *chain);
1392 void hammer2_chain_bulkdrop(hammer2_chain_t *copy);
1393
1394 void hammer2_chain_setcheck(hammer2_chain_t *chain, void *bdata);
1395 int hammer2_chain_testcheck(hammer2_chain_t *chain, void *bdata);
1396
1397
1398 void hammer2_pfs_memory_wait(hammer2_pfs_t *pmp);
1399 void hammer2_pfs_memory_inc(hammer2_pfs_t *pmp);
1400 void hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp);
1401
1402 void hammer2_base_delete(hammer2_chain_t *chain,
1403                                 hammer2_blockref_t *base, int count,
1404                                 int *cache_indexp, hammer2_chain_t *child);
1405 void hammer2_base_insert(hammer2_chain_t *chain,
1406                                 hammer2_blockref_t *base, int count,
1407                                 int *cache_indexp, hammer2_chain_t *child);
1408
1409 /*
1410  * hammer2_flush.c
1411  */
1412 void hammer2_flush(hammer2_chain_t *chain, int istop);
1413 void hammer2_flush_quick(hammer2_dev_t *hmp);
1414 void hammer2_delayed_flush(hammer2_chain_t *chain);
1415
1416 /*
1417  * hammer2_trans.c
1418  */
1419 void hammer2_trans_init(hammer2_pfs_t *pmp, uint32_t flags);
1420 hammer2_tid_t hammer2_trans_sub(hammer2_pfs_t *pmp);
1421 void hammer2_trans_clear_preflush(hammer2_pfs_t *pmp);
1422 void hammer2_trans_done(hammer2_pfs_t *pmp);
1423 hammer2_tid_t hammer2_trans_newinum(hammer2_pfs_t *pmp);
1424 void hammer2_trans_assert_strategy(hammer2_pfs_t *pmp);
1425
1426 /*
1427  * hammer2_ioctl.c
1428  */
1429 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
1430                                 int fflag, struct ucred *cred);
1431
1432 /*
1433  * hammer2_io.c
1434  */
1435 void hammer2_io_putblk(hammer2_io_t **diop);
1436 void hammer2_io_cleanup(hammer2_dev_t *hmp, struct hammer2_io_tree *tree);
1437 char *hammer2_io_data(hammer2_io_t *dio, off_t lbase);
1438 void hammer2_io_getblk(hammer2_dev_t *hmp, off_t lbase, int lsize,
1439                                 hammer2_iocb_t *iocb);
1440 void hammer2_io_complete(hammer2_iocb_t *iocb);
1441 void hammer2_io_callback(struct bio *bio);
1442 void hammer2_iocb_wait(hammer2_iocb_t *iocb);
1443 int hammer2_io_new(hammer2_dev_t *hmp, off_t lbase, int lsize,
1444                                 hammer2_io_t **diop);
1445 int hammer2_io_newnz(hammer2_dev_t *hmp, off_t lbase, int lsize,
1446                                 hammer2_io_t **diop);
1447 int hammer2_io_newq(hammer2_dev_t *hmp, off_t lbase, int lsize,
1448                                 hammer2_io_t **diop);
1449 int hammer2_io_bread(hammer2_dev_t *hmp, off_t lbase, int lsize,
1450                                 hammer2_io_t **diop);
1451 void hammer2_io_bawrite(hammer2_io_t **diop);
1452 void hammer2_io_bdwrite(hammer2_io_t **diop);
1453 int hammer2_io_bwrite(hammer2_io_t **diop);
1454 int hammer2_io_isdirty(hammer2_io_t *dio);
1455 void hammer2_io_setdirty(hammer2_io_t *dio);
1456 void hammer2_io_setinval(hammer2_io_t *dio, u_int bytes);
1457 void hammer2_io_brelse(hammer2_io_t **diop);
1458 void hammer2_io_bqrelse(hammer2_io_t **diop);
1459
1460 /*
1461  * XOP API in hammer2_thread.c
1462  */
1463 void hammer2_xop_group_init(hammer2_pfs_t *pmp, hammer2_xop_group_t *xgrp);
1464 void *hammer2_xop_alloc(hammer2_inode_t *ip, int flags);
1465 void hammer2_xop_setname(hammer2_xop_head_t *xop,
1466                                 const char *name, size_t name_len);
1467 void hammer2_xop_setname2(hammer2_xop_head_t *xop,
1468                                 const char *name, size_t name_len);
1469 void hammer2_xop_setip2(hammer2_xop_head_t *xop, hammer2_inode_t *ip2);
1470 void hammer2_xop_setip3(hammer2_xop_head_t *xop, hammer2_inode_t *ip3);
1471 void hammer2_xop_reinit(hammer2_xop_head_t *xop);
1472 void hammer2_xop_helper_create(hammer2_pfs_t *pmp);
1473 void hammer2_xop_helper_cleanup(hammer2_pfs_t *pmp);
1474 void hammer2_xop_start(hammer2_xop_head_t *xop, hammer2_xop_func_t func);
1475 void hammer2_xop_start_except(hammer2_xop_head_t *xop, hammer2_xop_func_t func,
1476                                 int notidx);
1477 int hammer2_xop_collect(hammer2_xop_head_t *xop, int flags);
1478 void hammer2_xop_retire(hammer2_xop_head_t *xop, uint32_t mask);
1479 int hammer2_xop_active(hammer2_xop_head_t *xop);
1480 int hammer2_xop_feed(hammer2_xop_head_t *xop, hammer2_chain_t *chain,
1481                                 int clindex, int error);
1482
1483 /*
1484  * XOP backends in hammer2_xops.c
1485  */
1486 void hammer2_xop_ipcluster(hammer2_xop_t *xop, int clidx);
1487 void hammer2_xop_readdir(hammer2_xop_t *xop, int clidx);
1488 void hammer2_xop_nresolve(hammer2_xop_t *xop, int clidx);
1489 void hammer2_xop_unlink(hammer2_xop_t *xop, int clidx);
1490 void hammer2_xop_nrename(hammer2_xop_t *xop, int clidx);
1491 void hammer2_xop_nlink(hammer2_xop_t *xop, int clidx);
1492 void hammer2_xop_scanlhc(hammer2_xop_t *xop, int clidx);
1493 void hammer2_xop_scanall(hammer2_xop_t *xop, int clidx);
1494 void hammer2_xop_lookup(hammer2_xop_t *xop, int clidx);
1495 void hammer2_inode_xop_create(hammer2_xop_t *xop, int clidx);
1496 void hammer2_inode_xop_destroy(hammer2_xop_t *xop, int clidx);
1497 void hammer2_inode_xop_chain_sync(hammer2_xop_t *xop, int clidx);
1498 void hammer2_inode_xop_unlinkall(hammer2_xop_t *xop, int clidx);
1499 void hammer2_inode_xop_connect(hammer2_xop_t *xop, int clidx);
1500 void hammer2_inode_xop_flush(hammer2_xop_t *xop, int clidx);
1501
1502 /*
1503  * hammer2_msgops.c
1504  */
1505 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg);
1506 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg);
1507
1508 /*
1509  * hammer2_vfsops.c
1510  */
1511 void hammer2_volconf_update(hammer2_dev_t *hmp, int index);
1512 void hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx);
1513 int hammer2_vfs_sync(struct mount *mp, int waitflags);
1514 hammer2_pfs_t *hammer2_pfsalloc(hammer2_chain_t *chain,
1515                                 const hammer2_inode_data_t *ripdata,
1516                                 hammer2_tid_t modify_tid);
1517
1518 void hammer2_lwinprog_ref(hammer2_pfs_t *pmp);
1519 void hammer2_lwinprog_drop(hammer2_pfs_t *pmp);
1520 void hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int pipe);
1521
1522 /*
1523  * hammer2_freemap.c
1524  */
1525 int hammer2_freemap_alloc(hammer2_chain_t *chain, size_t bytes);
1526 void hammer2_freemap_adjust(hammer2_dev_t *hmp,
1527                                 hammer2_blockref_t *bref, int how);
1528
1529 /*
1530  * hammer2_cluster.c
1531  */
1532 uint8_t hammer2_cluster_type(hammer2_cluster_t *cluster);
1533 const hammer2_media_data_t *hammer2_cluster_rdata(hammer2_cluster_t *cluster);
1534 hammer2_media_data_t *hammer2_cluster_wdata(hammer2_cluster_t *cluster);
1535 hammer2_cluster_t *hammer2_cluster_from_chain(hammer2_chain_t *chain);
1536 void hammer2_cluster_bref(hammer2_cluster_t *cluster, hammer2_blockref_t *bref);
1537 hammer2_cluster_t *hammer2_cluster_alloc(hammer2_pfs_t *pmp,
1538                                 hammer2_blockref_t *bref);
1539 void hammer2_cluster_ref(hammer2_cluster_t *cluster);
1540 void hammer2_cluster_drop(hammer2_cluster_t *cluster);
1541 void hammer2_cluster_lock(hammer2_cluster_t *cluster, int how);
1542 int hammer2_cluster_check(hammer2_cluster_t *cluster, hammer2_key_t lokey,
1543                         int flags);
1544 void hammer2_cluster_resolve(hammer2_cluster_t *cluster);
1545 void hammer2_cluster_forcegood(hammer2_cluster_t *cluster);
1546 hammer2_cluster_t *hammer2_cluster_copy(hammer2_cluster_t *ocluster);
1547 void hammer2_cluster_unlock(hammer2_cluster_t *cluster);
1548
1549 int hammer2_bulk_scan(hammer2_chain_t *parent,
1550                         int (*func)(hammer2_chain_t *chain, void *info),
1551                         void *info);
1552 int hammer2_bulkfree_pass(hammer2_dev_t *hmp,
1553                         struct hammer2_ioc_bulkfree *bfi);
1554
1555 /*
1556  * hammer2_iocom.c
1557  */
1558 void hammer2_iocom_init(hammer2_dev_t *hmp);
1559 void hammer2_iocom_uninit(hammer2_dev_t *hmp);
1560 void hammer2_cluster_reconnect(hammer2_dev_t *hmp, struct file *fp);
1561
1562 /*
1563  * hammer2_thread.c
1564  */
1565 void hammer2_thr_create(hammer2_thread_t *thr, hammer2_pfs_t *pmp,
1566                         const char *id, int clindex, int repidx,
1567                         void (*func)(void *arg));
1568 void hammer2_thr_delete(hammer2_thread_t *thr);
1569 void hammer2_thr_remaster(hammer2_thread_t *thr);
1570 void hammer2_thr_freeze_async(hammer2_thread_t *thr);
1571 void hammer2_thr_freeze(hammer2_thread_t *thr);
1572 void hammer2_thr_unfreeze(hammer2_thread_t *thr);
1573 void hammer2_primary_sync_thread(void *arg);
1574 void hammer2_primary_xops_thread(void *arg);
1575
1576 /*
1577  * hammer2_strategy.c
1578  */
1579 int hammer2_vop_strategy(struct vop_strategy_args *ap);
1580 int hammer2_vop_bmap(struct vop_bmap_args *ap);
1581 void hammer2_write_thread(void *arg);
1582 void hammer2_bioq_sync(hammer2_pfs_t *pmp);
1583
1584 #endif /* !_KERNEL */
1585 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */