sys/vfs/hammer2/hammer2_vnops.c

   1 /*
   2  * Copyright (c) 2011-2014 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  * by Daniel Flores (GSOC 2013 - mentored by Matthew Dillon, compression)
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  * 3. Neither the name of The DragonFly Project nor the names of its
  20  *    contributors may be used to endorse or promote products derived
  21  *    from this software without specific, prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  26  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  27  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  29  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  31  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  33  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36 /*
  37  * Kernel Filesystem interface
  38  *
  39  * NOTE! local ipdata pointers must be reloaded on any modifying operation
  40  *       to the inode as its underlying chain may have changed.
  41  */
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/kernel.h>
  46 #include <sys/fcntl.h>
  47 #include <sys/buf.h>
  48 #include <sys/proc.h>
  49 #include <sys/namei.h>
  50 #include <sys/mount.h>
  51 #include <sys/vnode.h>
  52 #include <sys/mountctl.h>
  53 #include <sys/dirent.h>
  54 #include <sys/uio.h>
  55 #include <sys/objcache.h>
  56 #include <sys/event.h>
  57 #include <sys/file.h>
  58 #include <vfs/fifofs/fifo.h>
  59
  60 #include "hammer2.h"
  61 #include "hammer2_lz4.h"
  62
  63 #include "zlib/hammer2_zlib.h"
  64
  65 #define ZFOFFSET        (-2LL)
  66
  67 static int hammer2_read_file(hammer2_inode_t *ip, struct uio *uio,
  68                                 int seqcount);
  69 static int hammer2_write_file(hammer2_inode_t *ip, struct uio *uio,
  70                                 int ioflag, int seqcount);
  71 static void hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize);
  72 static void hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize);
  73
  74 struct objcache *cache_buffer_read;
  75 struct objcache *cache_buffer_write;
  76
  77 /*
  78  * Callback used in read path in case that a block is compressed with LZ4.
  79  */
  80 static
  81 void
  82 hammer2_decompress_LZ4_callback(const char *data, u_int bytes, struct bio *bio)
  83 {
  84         struct buf *bp;
  85         char *compressed_buffer;
  86         int compressed_size;
  87         int result;
  88
  89         bp = bio->bio_buf;
  90
  91 #if 0
  92         if bio->bio_caller_info2.index &&
  93               bio->bio_caller_info1.uvalue32 !=
  94               crc32(bp->b_data, bp->b_bufsize) --- return error
  95 #endif
  96
  97         KKASSERT(bp->b_bufsize <= HAMMER2_PBUFSIZE);
  98         compressed_size = *(const int *)data;
  99         KKASSERT(compressed_size <= bytes - sizeof(int));
 100
 101         compressed_buffer = objcache_get(cache_buffer_read, M_INTWAIT);
 102         result = LZ4_decompress_safe(__DECONST(char *, &data[sizeof(int)]),
 103                                      compressed_buffer,
 104                                      compressed_size,
 105                                      bp->b_bufsize);
 106         if (result < 0) {
 107                 kprintf("READ PATH: Error during decompression."
 108                         "bio %016jx/%d\n",
 109                         (intmax_t)bio->bio_offset, bytes);
 110                 /* make sure it isn't random garbage */
 111                 bzero(compressed_buffer, bp->b_bufsize);
 112         }
 113         KKASSERT(result <= bp->b_bufsize);
 114         bcopy(compressed_buffer, bp->b_data, bp->b_bufsize);
 115         if (result < bp->b_bufsize)
 116                 bzero(bp->b_data + result, bp->b_bufsize - result);
 117         objcache_put(cache_buffer_read, compressed_buffer);
 118         bp->b_resid = 0;
 119         bp->b_flags |= B_AGE;
 120 }
 121
 122 /*
 123  * Callback used in read path in case that a block is compressed with ZLIB.
 124  * It is almost identical to LZ4 callback, so in theory they can be unified,
 125  * but we didn't want to make changes in bio structure for that.
 126  */
 127 static
 128 void
 129 hammer2_decompress_ZLIB_callback(const char *data, u_int bytes, struct bio *bio)
 130 {
 131         struct buf *bp;
 132         char *compressed_buffer;
 133         z_stream strm_decompress;
 134         int result;
 135         int ret;
 136
 137         bp = bio->bio_buf;
 138
 139         KKASSERT(bp->b_bufsize <= HAMMER2_PBUFSIZE);
 140         strm_decompress.avail_in = 0;
 141         strm_decompress.next_in = Z_NULL;
 142
 143         ret = inflateInit(&strm_decompress);
 144
 145         if (ret != Z_OK)
 146                 kprintf("HAMMER2 ZLIB: Fatal error in inflateInit.\n");
 147
 148         compressed_buffer = objcache_get(cache_buffer_read, M_INTWAIT);
 149         strm_decompress.next_in = __DECONST(char *, data);
 150
 151         /* XXX supply proper size, subset of device bp */
 152         strm_decompress.avail_in = bytes;
 153         strm_decompress.next_out = compressed_buffer;
 154         strm_decompress.avail_out = bp->b_bufsize;
 155
 156         ret = inflate(&strm_decompress, Z_FINISH);
 157         if (ret != Z_STREAM_END) {
 158                 kprintf("HAMMER2 ZLIB: Fatar error during decompression.\n");
 159                 bzero(compressed_buffer, bp->b_bufsize);
 160         }
 161         bcopy(compressed_buffer, bp->b_data, bp->b_bufsize);
 162         result = bp->b_bufsize - strm_decompress.avail_out;
 163         if (result < bp->b_bufsize)
 164                 bzero(bp->b_data + result, strm_decompress.avail_out);
 165         objcache_put(cache_buffer_read, compressed_buffer);
 166         ret = inflateEnd(&strm_decompress);
 167
 168         bp->b_resid = 0;
 169         bp->b_flags |= B_AGE;
 170 }
 171
 172 static __inline
 173 void
 174 hammer2_knote(struct vnode *vp, int flags)
 175 {
 176         if (flags)
 177                 KNOTE(&vp->v_pollinfo.vpi_kqinfo.ki_note, flags);
 178 }
 179
 180 /*
 181  * Last reference to a vnode is going away but it is still cached.
 182  */
 183 static
 184 int
 185 hammer2_vop_inactive(struct vop_inactive_args *ap)
 186 {
 187         hammer2_inode_t *ip;
 188         hammer2_cluster_t *cluster;
 189         struct vnode *vp;
 190
 191         LOCKSTART;
 192         vp = ap->a_vp;
 193         ip = VTOI(vp);
 194
 195         /*
 196          * Degenerate case
 197          */
 198         if (ip == NULL) {
 199                 vrecycle(vp);
 200                 LOCKSTOP;
 201                 return (0);
 202         }
 203
 204         /*
 205          * Detect updates to the embedded data which may be synchronized by
 206          * the strategy code.  Simply mark the inode modified so it gets
 207          * picked up by our normal flush.
 208          */
 209         cluster = hammer2_inode_lock_nex(ip, HAMMER2_RESOLVE_NEVER);
 210         KKASSERT(cluster);
 211
 212         /*
 213          * Check for deleted inodes and recycle immediately.
 214          *
 215          * WARNING: nvtruncbuf() can only be safely called without the inode
 216          *          lock held due to the way our write thread works.
 217          */
 218         if (hammer2_cluster_isunlinked(cluster)) {
 219                 hammer2_key_t lbase;
 220                 int nblksize;
 221
 222                 nblksize = hammer2_calc_logical(ip, 0, &lbase, NULL);
 223                 hammer2_inode_unlock_ex(ip, cluster);
 224                 nvtruncbuf(vp, 0, nblksize, 0, 0);
 225                 vrecycle(vp);
 226         } else {
 227                 hammer2_inode_unlock_ex(ip, cluster);
 228         }
 229         LOCKSTOP;
 230         return (0);
 231 }
 232
 233 /*
 234  * Reclaim a vnode so that it can be reused; after the inode is
 235  * disassociated, the filesystem must manage it alone.
 236  */
 237 static
 238 int
 239 hammer2_vop_reclaim(struct vop_reclaim_args *ap)
 240 {
 241         hammer2_cluster_t *cluster;
 242         hammer2_inode_t *ip;
 243         hammer2_pfs_t *pmp;
 244         struct vnode *vp;
 245
 246         LOCKSTART;
 247         vp = ap->a_vp;
 248         ip = VTOI(vp);
 249         if (ip == NULL) {
 250                 LOCKSTOP;
 251                 return(0);
 252         }
 253
 254         /*
 255          * Inode must be locked for reclaim.
 256          */
 257         pmp = ip->pmp;
 258         cluster = hammer2_inode_lock_nex(ip, HAMMER2_RESOLVE_NEVER);
 259
 260         /*
 261          * The final close of a deleted file or directory marks it for
 262          * destruction.  The DELETED flag allows the flusher to shortcut
 263          * any modified blocks still unflushed (that is, just ignore them).
 264          *
 265          * HAMMER2 usually does not try to optimize the freemap by returning
 266          * deleted blocks to it as it does not usually know how many snapshots
 267          * might be referencing portions of the file/dir.
 268          */
 269         vp->v_data = NULL;
 270         ip->vp = NULL;
 271
 272         /*
 273          * NOTE! We do not attempt to flush chains here, flushing is
 274          *       really fragile and could also deadlock.
 275          */
 276         vclrisdirty(vp);
 277
 278         /*
 279          * A reclaim can occur at any time so we cannot safely start a
 280          * transaction to handle reclamation of unlinked files.  Instead,
 281          * the ip is left with a reference and placed on a linked list and
 282          * handled later on.
 283          */
 284         if (hammer2_cluster_isunlinked(cluster)) {
 285                 hammer2_inode_unlink_t *ipul;
 286
 287                 ipul = kmalloc(sizeof(*ipul), pmp->minode, M_WAITOK | M_ZERO);
 288                 ipul->ip = ip;
 289
 290                 hammer2_spin_ex(&pmp->list_spin);
 291                 TAILQ_INSERT_TAIL(&pmp->unlinkq, ipul, entry);
 292                 hammer2_spin_unex(&pmp->list_spin);
 293                 hammer2_inode_unlock_ex(ip, cluster);   /* unlock */
 294                 /* retain ref from vp for ipul */
 295         } else {
 296                 hammer2_inode_unlock_ex(ip, cluster);   /* unlock */
 297                 hammer2_inode_drop(ip);                 /* vp ref */
 298         }
 299         /* cluster no longer referenced */
 300         /* cluster = NULL; not needed */
 301
 302         /*
 303          * XXX handle background sync when ip dirty, kernel will no longer
 304          * notify us regarding this inode because there is no longer a
 305          * vnode attached to it.
 306          */
 307
 308         LOCKSTOP;
 309         return (0);
 310 }
 311
 312 static
 313 int
 314 hammer2_vop_fsync(struct vop_fsync_args *ap)
 315 {
 316         hammer2_inode_t *ip;
 317         hammer2_trans_t trans;
 318         hammer2_cluster_t *cluster;
 319         struct vnode *vp;
 320
 321         LOCKSTART;
 322         vp = ap->a_vp;
 323         ip = VTOI(vp);
 324
 325 #if 0
 326         /* XXX can't do this yet */
 327         hammer2_trans_init(&trans, ip->pmp, HAMMER2_TRANS_ISFLUSH);
 328         vfsync(vp, ap->a_waitfor, 1, NULL, NULL);
 329 #endif
 330         hammer2_trans_init(&trans, ip->pmp, 0);
 331         vfsync(vp, ap->a_waitfor, 1, NULL, NULL);
 332
 333         /*
 334          * Calling chain_flush here creates a lot of duplicative
 335          * COW operations due to non-optimal vnode ordering.
 336          *
 337          * Only do it for an actual fsync() syscall.  The other forms
 338          * which call this function will eventually call chain_flush
 339          * on the volume root as a catch-all, which is far more optimal.
 340          */
 341         cluster = hammer2_inode_lock_ex(ip);
 342         atomic_clear_int(&ip->flags, HAMMER2_INODE_MODIFIED);
 343         vclrisdirty(vp);
 344         if (ip->flags & (HAMMER2_INODE_RESIZED|HAMMER2_INODE_MTIME))
 345                 hammer2_inode_fsync(&trans, ip, cluster);
 346
 347 #if 0
 348         /*
 349          * XXX creates discontinuity w/modify_tid
 350          */
 351         if (ap->a_flags & VOP_FSYNC_SYSCALL) {
 352                 hammer2_flush(&trans, cluster);
 353         }
 354 #endif
 355         hammer2_inode_unlock_ex(ip, cluster);
 356         hammer2_trans_done(&trans);
 357
 358         LOCKSTOP;
 359         return (0);
 360 }
 361
 362 static
 363 int
 364 hammer2_vop_access(struct vop_access_args *ap)
 365 {
 366         hammer2_inode_t *ip = VTOI(ap->a_vp);
 367         const hammer2_inode_data_t *ripdata;
 368         hammer2_cluster_t *cluster;
 369         uid_t uid;
 370         gid_t gid;
 371         int error;
 372
 373         LOCKSTART;
 374         cluster = hammer2_inode_lock_sh(ip);
 375         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 376         uid = hammer2_to_unix_xid(&ripdata->uid);
 377         gid = hammer2_to_unix_xid(&ripdata->gid);
 378         error = vop_helper_access(ap, uid, gid, ripdata->mode, ripdata->uflags);
 379         hammer2_inode_unlock_sh(ip, cluster);
 380
 381         LOCKSTOP;
 382         return (error);
 383 }
 384
 385 static
 386 int
 387 hammer2_vop_getattr(struct vop_getattr_args *ap)
 388 {
 389         const hammer2_inode_data_t *ripdata;
 390         hammer2_cluster_t *cluster;
 391         hammer2_pfs_t *pmp;
 392         hammer2_inode_t *ip;
 393         struct vnode *vp;
 394         struct vattr *vap;
 395
 396         LOCKSTART;
 397         vp = ap->a_vp;
 398         vap = ap->a_vap;
 399
 400         ip = VTOI(vp);
 401         pmp = ip->pmp;
 402
 403         cluster = hammer2_inode_lock_sh(ip);
 404         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 405         KKASSERT(hammer2_cluster_type(cluster) == HAMMER2_BREF_TYPE_INODE);
 406
 407         vap->va_fsid = pmp->mp->mnt_stat.f_fsid.val[0];
 408         vap->va_fileid = ripdata->inum;
 409         vap->va_mode = ripdata->mode;
 410         vap->va_nlink = ripdata->nlinks;
 411         vap->va_uid = hammer2_to_unix_xid(&ripdata->uid);
 412         vap->va_gid = hammer2_to_unix_xid(&ripdata->gid);
 413         vap->va_rmajor = 0;
 414         vap->va_rminor = 0;
 415         vap->va_size = ip->size;        /* protected by shared lock */
 416         vap->va_blocksize = HAMMER2_PBUFSIZE;
 417         vap->va_flags = ripdata->uflags;
 418         hammer2_time_to_timespec(ripdata->ctime, &vap->va_ctime);
 419         hammer2_time_to_timespec(ripdata->mtime, &vap->va_mtime);
 420         hammer2_time_to_timespec(ripdata->mtime, &vap->va_atime);
 421         vap->va_gen = 1;
 422         vap->va_bytes = vap->va_size;   /* XXX */
 423         vap->va_type = hammer2_get_vtype(ripdata);
 424         vap->va_filerev = 0;
 425         vap->va_uid_uuid = ripdata->uid;
 426         vap->va_gid_uuid = ripdata->gid;
 427         vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
 428                           VA_FSID_UUID_VALID;
 429
 430         hammer2_inode_unlock_sh(ip, cluster);
 431
 432         LOCKSTOP;
 433         return (0);
 434 }
 435
 436 static
 437 int
 438 hammer2_vop_setattr(struct vop_setattr_args *ap)
 439 {
 440         const hammer2_inode_data_t *ripdata;
 441         hammer2_inode_data_t *wipdata;
 442         hammer2_inode_t *ip;
 443         hammer2_cluster_t *cluster;
 444         hammer2_trans_t trans;
 445         struct vnode *vp;
 446         struct vattr *vap;
 447         int error;
 448         int kflags = 0;
 449         int domtime = 0;
 450         int dosync = 0;
 451         uint64_t ctime;
 452
 453         LOCKSTART;
 454         vp = ap->a_vp;
 455         vap = ap->a_vap;
 456         hammer2_update_time(&ctime);
 457
 458         ip = VTOI(vp);
 459
 460         if (ip->pmp->ronly) {
 461                 LOCKSTOP;
 462                 return(EROFS);
 463         }
 464
 465         hammer2_pfs_memory_wait(ip->pmp);
 466         hammer2_trans_init(&trans, ip->pmp, 0);
 467         cluster = hammer2_inode_lock_ex(ip);
 468         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 469         error = 0;
 470
 471         if (vap->va_flags != VNOVAL) {
 472                 u_int32_t flags;
 473
 474                 flags = ripdata->uflags;
 475                 error = vop_helper_setattr_flags(&flags, vap->va_flags,
 476                                          hammer2_to_unix_xid(&ripdata->uid),
 477                                          ap->a_cred);
 478                 if (error == 0) {
 479                         if (ripdata->uflags != flags) {
 480                                 wipdata = hammer2_cluster_modify_ip(&trans, ip,
 481                                                                     cluster, 0);
 482                                 wipdata->uflags = flags;
 483                                 wipdata->ctime = ctime;
 484                                 kflags |= NOTE_ATTRIB;
 485                                 dosync = 1;
 486                                 ripdata = wipdata;
 487                         }
 488                         if (ripdata->uflags & (IMMUTABLE | APPEND)) {
 489                                 error = 0;
 490                                 goto done;
 491                         }
 492                 }
 493                 goto done;
 494         }
 495         if (ripdata->uflags & (IMMUTABLE | APPEND)) {
 496                 error = EPERM;
 497                 goto done;
 498         }
 499         if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
 500                 mode_t cur_mode = ripdata->mode;
 501                 uid_t cur_uid = hammer2_to_unix_xid(&ripdata->uid);
 502                 gid_t cur_gid = hammer2_to_unix_xid(&ripdata->gid);
 503                 uuid_t uuid_uid;
 504                 uuid_t uuid_gid;
 505
 506                 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
 507                                          ap->a_cred,
 508                                          &cur_uid, &cur_gid, &cur_mode);
 509                 if (error == 0) {
 510                         hammer2_guid_to_uuid(&uuid_uid, cur_uid);
 511                         hammer2_guid_to_uuid(&uuid_gid, cur_gid);
 512                         if (bcmp(&uuid_uid, &ripdata->uid, sizeof(uuid_uid)) ||
 513                             bcmp(&uuid_gid, &ripdata->gid, sizeof(uuid_gid)) ||
 514                             ripdata->mode != cur_mode
 515                         ) {
 516                                 wipdata = hammer2_cluster_modify_ip(&trans, ip,
 517                                                                     cluster, 0);
 518                                 wipdata->uid = uuid_uid;
 519                                 wipdata->gid = uuid_gid;
 520                                 wipdata->mode = cur_mode;
 521                                 wipdata->ctime = ctime;
 522                                 dosync = 1;
 523                                 ripdata = wipdata;
 524                         }
 525                         kflags |= NOTE_ATTRIB;
 526                 }
 527         }
 528
 529         /*
 530          * Resize the file
 531          */
 532         if (vap->va_size != VNOVAL && ip->size != vap->va_size) {
 533                 switch(vp->v_type) {
 534                 case VREG:
 535                         if (vap->va_size == ip->size)
 536                                 break;
 537                         hammer2_inode_unlock_ex(ip, cluster);
 538                         if (vap->va_size < ip->size) {
 539                                 hammer2_truncate_file(ip, vap->va_size);
 540                         } else {
 541                                 hammer2_extend_file(ip, vap->va_size);
 542                         }
 543                         cluster = hammer2_inode_lock_ex(ip);
 544                         /* RELOAD */
 545                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 546                         domtime = 1;
 547                         break;
 548                 default:
 549                         error = EINVAL;
 550                         goto done;
 551                 }
 552         }
 553 #if 0
 554         /* atime not supported */
 555         if (vap->va_atime.tv_sec != VNOVAL) {
 556                 wipdata = hammer2_cluster_modify_ip(&trans, ip, cluster, 0);
 557                 wipdata->atime = hammer2_timespec_to_time(&vap->va_atime);
 558                 kflags |= NOTE_ATTRIB;
 559                 dosync = 1;
 560                 ripdata = wipdata;
 561         }
 562 #endif
 563         if (vap->va_mtime.tv_sec != VNOVAL) {
 564                 wipdata = hammer2_cluster_modify_ip(&trans, ip, cluster, 0);
 565                 wipdata->mtime = hammer2_timespec_to_time(&vap->va_mtime);
 566                 kflags |= NOTE_ATTRIB;
 567                 domtime = 0;
 568                 dosync = 1;
 569                 ripdata = wipdata;
 570         }
 571         if (vap->va_mode != (mode_t)VNOVAL) {
 572                 mode_t cur_mode = ripdata->mode;
 573                 uid_t cur_uid = hammer2_to_unix_xid(&ripdata->uid);
 574                 gid_t cur_gid = hammer2_to_unix_xid(&ripdata->gid);
 575
 576                 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
 577                                          cur_uid, cur_gid, &cur_mode);
 578                 if (error == 0 && ripdata->mode != cur_mode) {
 579                         wipdata = hammer2_cluster_modify_ip(&trans, ip,
 580                                                             cluster, 0);
 581                         wipdata->mode = cur_mode;
 582                         wipdata->ctime = ctime;
 583                         kflags |= NOTE_ATTRIB;
 584                         dosync = 1;
 585                         ripdata = wipdata;
 586                 }
 587         }
 588
 589         /*
 590          * If a truncation occurred we must call inode_fsync() now in order
 591          * to trim the related data chains, otherwise a later expansion can
 592          * cause havoc.
 593          */
 594         if (dosync) {
 595                 hammer2_cluster_modsync(cluster);
 596                 dosync = 0;
 597         }
 598         hammer2_inode_fsync(&trans, ip, cluster);
 599
 600         /*
 601          * Cleanup.  If domtime is set an additional inode modification
 602          * must be flagged.  All other modifications will have already
 603          * set INODE_MODIFIED and called vsetisdirty().
 604          */
 605 done:
 606         if (domtime) {
 607                 atomic_set_int(&ip->flags, HAMMER2_INODE_MODIFIED |
 608                                            HAMMER2_INODE_MTIME);
 609                 vsetisdirty(ip->vp);
 610         }
 611         if (dosync)
 612                 hammer2_cluster_modsync(cluster);
 613         hammer2_inode_unlock_ex(ip, cluster);
 614         hammer2_trans_done(&trans);
 615         hammer2_knote(ip->vp, kflags);
 616
 617         LOCKSTOP;
 618         return (error);
 619 }
 620
 621 static
 622 int
 623 hammer2_vop_readdir(struct vop_readdir_args *ap)
 624 {
 625         const hammer2_inode_data_t *ripdata;
 626         hammer2_inode_t *ip;
 627         hammer2_inode_t *xip;
 628         hammer2_cluster_t *cparent;
 629         hammer2_cluster_t *cluster;
 630         hammer2_cluster_t *xcluster;
 631         hammer2_blockref_t bref;
 632         hammer2_tid_t inum;
 633         hammer2_key_t key_next;
 634         hammer2_key_t lkey;
 635         struct uio *uio;
 636         off_t *cookies;
 637         off_t saveoff;
 638         int cookie_index;
 639         int ncookies;
 640         int error;
 641         int dtype;
 642         int ddflag;
 643         int r;
 644
 645         LOCKSTART;
 646         ip = VTOI(ap->a_vp);
 647         uio = ap->a_uio;
 648         saveoff = uio->uio_offset;
 649
 650         /*
 651          * Setup cookies directory entry cookies if requested
 652          */
 653         if (ap->a_ncookies) {
 654                 ncookies = uio->uio_resid / 16 + 1;
 655                 if (ncookies > 1024)
 656                         ncookies = 1024;
 657                 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
 658         } else {
 659                 ncookies = -1;
 660                 cookies = NULL;
 661         }
 662         cookie_index = 0;
 663
 664         cparent = hammer2_inode_lock_sh(ip);
 665         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
 666
 667         /*
 668          * Handle artificial entries.  To ensure that only positive 64 bit
 669          * quantities are returned to userland we always strip off bit 63.
 670          * The hash code is designed such that codes 0x0000-0x7FFF are not
 671          * used, allowing us to use these codes for articial entries.
 672          *
 673          * Entry 0 is used for '.' and entry 1 is used for '..'.  Do not
 674          * allow '..' to cross the mount point into (e.g.) the super-root.
 675          */
 676         error = 0;
 677         cluster = (void *)(intptr_t)-1; /* non-NULL for early goto done case */
 678
 679         if (saveoff == 0) {
 680                 inum = ripdata->inum & HAMMER2_DIRHASH_USERMSK;
 681                 r = vop_write_dirent(&error, uio, inum, DT_DIR, 1, ".");
 682                 if (r)
 683                         goto done;
 684                 if (cookies)
 685                         cookies[cookie_index] = saveoff;
 686                 ++saveoff;
 687                 ++cookie_index;
 688                 if (cookie_index == ncookies)
 689                         goto done;
 690         }
 691
 692         if (saveoff == 1) {
 693                 /*
 694                  * Be careful with lockorder when accessing ".."
 695                  *
 696                  * (ip is the current dir. xip is the parent dir).
 697                  */
 698                 inum = ripdata->inum & HAMMER2_DIRHASH_USERMSK;
 699                 while (ip->pip != NULL && ip != ip->pmp->iroot) {
 700                         xip = ip->pip;
 701                         hammer2_inode_ref(xip);
 702                         hammer2_inode_unlock_sh(ip, cparent);
 703                         xcluster = hammer2_inode_lock_sh(xip);
 704                         cparent = hammer2_inode_lock_sh(ip);
 705                         hammer2_inode_drop(xip);
 706                         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
 707                         if (xip == ip->pip) {
 708                                 inum = hammer2_cluster_rdata(xcluster)->
 709                                         ipdata.inum & HAMMER2_DIRHASH_USERMSK;
 710                                 hammer2_inode_unlock_sh(xip, xcluster);
 711                                 break;
 712                         }
 713                         hammer2_inode_unlock_sh(xip, xcluster);
 714                 }
 715                 r = vop_write_dirent(&error, uio, inum, DT_DIR, 2, "..");
 716                 if (r)
 717                         goto done;
 718                 if (cookies)
 719                         cookies[cookie_index] = saveoff;
 720                 ++saveoff;
 721                 ++cookie_index;
 722                 if (cookie_index == ncookies)
 723                         goto done;
 724         }
 725
 726         lkey = saveoff | HAMMER2_DIRHASH_VISIBLE;
 727         if (hammer2_debug & 0x0020)
 728                 kprintf("readdir: lkey %016jx\n", lkey);
 729
 730         /*
 731          * parent is the inode cluster, already locked for us.  Don't
 732          * double lock shared locks as this will screw up upgrades.
 733          */
 734         if (error) {
 735                 goto done;
 736         }
 737         cluster = hammer2_cluster_lookup(cparent, &key_next, lkey, lkey,
 738                                      HAMMER2_LOOKUP_SHARED, &ddflag);
 739         if (cluster == NULL) {
 740                 cluster = hammer2_cluster_lookup(cparent, &key_next,
 741                                              lkey, (hammer2_key_t)-1,
 742                                              HAMMER2_LOOKUP_SHARED, &ddflag);
 743         }
 744         if (cluster)
 745                 hammer2_cluster_bref(cluster, &bref);
 746         while (cluster) {
 747                 if (hammer2_debug & 0x0020)
 748                         kprintf("readdir: p=%p chain=%p %016jx (next %016jx)\n",
 749                                 cparent->focus, cluster->focus,
 750                                 bref.key, key_next);
 751
 752                 if (bref.type == HAMMER2_BREF_TYPE_INODE) {
 753                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 754                         dtype = hammer2_get_dtype(ripdata);
 755                         saveoff = bref.key & HAMMER2_DIRHASH_USERMSK;
 756                         r = vop_write_dirent(&error, uio,
 757                                              ripdata->inum &
 758                                               HAMMER2_DIRHASH_USERMSK,
 759                                              dtype,
 760                                              ripdata->name_len,
 761                                              ripdata->filename);
 762                         if (r)
 763                                 break;
 764                         if (cookies)
 765                                 cookies[cookie_index] = saveoff;
 766                         ++cookie_index;
 767                 } else {
 768                         /* XXX chain error */
 769                         kprintf("bad chain type readdir %d\n", bref.type);
 770                 }
 771
 772                 /*
 773                  * Keys may not be returned in order so once we have a
 774                  * placemarker (cluster) the scan must allow the full range
 775                  * or some entries will be missed.
 776                  */
 777                 cluster = hammer2_cluster_next(cparent, cluster, &key_next,
 778                                                key_next, (hammer2_key_t)-1,
 779                                                HAMMER2_LOOKUP_SHARED);
 780                 if (cluster) {
 781                         hammer2_cluster_bref(cluster, &bref);
 782                         saveoff = (bref.key & HAMMER2_DIRHASH_USERMSK) + 1;
 783                 } else {
 784                         saveoff = (hammer2_key_t)-1;
 785                 }
 786                 if (cookie_index == ncookies)
 787                         break;
 788         }
 789         if (cluster)
 790                 hammer2_cluster_unlock(cluster);
 791 done:
 792         hammer2_inode_unlock_sh(ip, cparent);
 793         if (ap->a_eofflag)
 794                 *ap->a_eofflag = (cluster == NULL);
 795         if (hammer2_debug & 0x0020)
 796                 kprintf("readdir: done at %016jx\n", saveoff);
 797         uio->uio_offset = saveoff & ~HAMMER2_DIRHASH_VISIBLE;
 798         if (error && cookie_index == 0) {
 799                 if (cookies) {
 800                         kfree(cookies, M_TEMP);
 801                         *ap->a_ncookies = 0;
 802                         *ap->a_cookies = NULL;
 803                 }
 804         } else {
 805                 if (cookies) {
 806                         *ap->a_ncookies = cookie_index;
 807                         *ap->a_cookies = cookies;
 808                 }
 809         }
 810         LOCKSTOP;
 811         return (error);
 812 }
 813
 814 /*
 815  * hammer2_vop_readlink { vp, uio, cred }
 816  */
 817 static
 818 int
 819 hammer2_vop_readlink(struct vop_readlink_args *ap)
 820 {
 821         struct vnode *vp;
 822         hammer2_inode_t *ip;
 823         int error;
 824
 825         vp = ap->a_vp;
 826         if (vp->v_type != VLNK)
 827                 return (EINVAL);
 828         ip = VTOI(vp);
 829
 830         error = hammer2_read_file(ip, ap->a_uio, 0);
 831         return (error);
 832 }
 833
 834 static
 835 int
 836 hammer2_vop_read(struct vop_read_args *ap)
 837 {
 838         struct vnode *vp;
 839         hammer2_inode_t *ip;
 840         struct uio *uio;
 841         int error;
 842         int seqcount;
 843         int bigread;
 844
 845         /*
 846          * Read operations supported on this vnode?
 847          */
 848         vp = ap->a_vp;
 849         if (vp->v_type != VREG)
 850                 return (EINVAL);
 851
 852         /*
 853          * Misc
 854          */
 855         ip = VTOI(vp);
 856         uio = ap->a_uio;
 857         error = 0;
 858
 859         seqcount = ap->a_ioflag >> 16;
 860         bigread = (uio->uio_resid > 100 * 1024 * 1024);
 861
 862         error = hammer2_read_file(ip, uio, seqcount);
 863         return (error);
 864 }
 865
 866 static
 867 int
 868 hammer2_vop_write(struct vop_write_args *ap)
 869 {
 870         hammer2_inode_t *ip;
 871         hammer2_trans_t trans;
 872         thread_t td;
 873         struct vnode *vp;
 874         struct uio *uio;
 875         int error;
 876         int seqcount;
 877         int bigwrite;
 878
 879         /*
 880          * Read operations supported on this vnode?
 881          */
 882         vp = ap->a_vp;
 883         if (vp->v_type != VREG)
 884                 return (EINVAL);
 885
 886         /*
 887          * Misc
 888          */
 889         ip = VTOI(vp);
 890         uio = ap->a_uio;
 891         error = 0;
 892         if (ip->pmp->ronly) {
 893                 return (EROFS);
 894         }
 895
 896         seqcount = ap->a_ioflag >> 16;
 897         bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
 898
 899         /*
 900          * Check resource limit
 901          */
 902         if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc &&
 903             uio->uio_offset + uio->uio_resid >
 904              td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
 905                 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ);
 906                 return (EFBIG);
 907         }
 908
 909         bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
 910
 911         /*
 912          * The transaction interlocks against flushes initiations
 913          * (note: but will run concurrently with the actual flush).
 914          */
 915         hammer2_trans_init(&trans, ip->pmp, 0);
 916         error = hammer2_write_file(ip, uio, ap->a_ioflag, seqcount);
 917         hammer2_trans_done(&trans);
 918
 919         return (error);
 920 }
 921
 922 /*
 923  * Perform read operations on a file or symlink given an UNLOCKED
 924  * inode and uio.
 925  *
 926  * The passed ip is not locked.
 927  */
 928 static
 929 int
 930 hammer2_read_file(hammer2_inode_t *ip, struct uio *uio, int seqcount)
 931 {
 932         hammer2_off_t size;
 933         struct buf *bp;
 934         int error;
 935
 936         error = 0;
 937
 938         /*
 939          * UIO read loop.
 940          *
 941          * WARNING! Assumes that the kernel interlocks size changes at the
 942          *          vnode level.
 943          */
 944         hammer2_mtx_sh(&ip->lock);
 945         size = ip->size;
 946         hammer2_mtx_unlock(&ip->lock);
 947
 948         while (uio->uio_resid > 0 && uio->uio_offset < size) {
 949                 hammer2_key_t lbase;
 950                 hammer2_key_t leof;
 951                 int lblksize;
 952                 int loff;
 953                 int n;
 954
 955                 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
 956                                                 &lbase, &leof);
 957
 958                 error = cluster_read(ip->vp, leof, lbase, lblksize,
 959                                      uio->uio_resid, seqcount * BKVASIZE,
 960                                      &bp);
 961
 962                 if (error)
 963                         break;
 964                 loff = (int)(uio->uio_offset - lbase);
 965                 n = lblksize - loff;
 966                 if (n > uio->uio_resid)
 967                         n = uio->uio_resid;
 968                 if (n > size - uio->uio_offset)
 969                         n = (int)(size - uio->uio_offset);
 970                 bp->b_flags |= B_AGE;
 971                 uiomove((char *)bp->b_data + loff, n, uio);
 972                 bqrelse(bp);
 973         }
 974         return (error);
 975 }
 976
 977 /*
 978  * Write to the file represented by the inode via the logical buffer cache.
 979  * The inode may represent a regular file or a symlink.
 980  *
 981  * The inode must not be locked.
 982  */
 983 static
 984 int
 985 hammer2_write_file(hammer2_inode_t *ip,
 986                    struct uio *uio, int ioflag, int seqcount)
 987 {
 988         hammer2_key_t old_eof;
 989         hammer2_key_t new_eof;
 990         struct buf *bp;
 991         int kflags;
 992         int error;
 993         int modified;
 994
 995         /*
 996          * Setup if append
 997          *
 998          * WARNING! Assumes that the kernel interlocks size changes at the
 999          *          vnode level.
1000          */
1001         hammer2_mtx_ex(&ip->lock);
1002         if (ioflag & IO_APPEND)
1003                 uio->uio_offset = ip->size;
1004         old_eof = ip->size;
1005         hammer2_mtx_unlock(&ip->lock);
1006
1007         /*
1008          * Extend the file if necessary.  If the write fails at some point
1009          * we will truncate it back down to cover as much as we were able
1010          * to write.
1011          *
1012          * Doing this now makes it easier to calculate buffer sizes in
1013          * the loop.
1014          */
1015         kflags = 0;
1016         error = 0;
1017         modified = 0;
1018
1019         if (uio->uio_offset + uio->uio_resid > old_eof) {
1020                 new_eof = uio->uio_offset + uio->uio_resid;
1021                 modified = 1;
1022                 hammer2_extend_file(ip, new_eof);
1023                 kflags |= NOTE_EXTEND;
1024         } else {
1025                 new_eof = old_eof;
1026         }
1027
1028         /*
1029          * UIO write loop
1030          */
1031         while (uio->uio_resid > 0) {
1032                 hammer2_key_t lbase;
1033                 int trivial;
1034                 int endofblk;
1035                 int lblksize;
1036                 int loff;
1037                 int n;
1038
1039                 /*
1040                  * Don't allow the buffer build to blow out the buffer
1041                  * cache.
1042                  */
1043                 if ((ioflag & IO_RECURSE) == 0)
1044                         bwillwrite(HAMMER2_PBUFSIZE);
1045
1046                 /*
1047                  * This nominally tells us how much we can cluster and
1048                  * what the logical buffer size needs to be.  Currently
1049                  * we don't try to cluster the write and just handle one
1050                  * block at a time.
1051                  */
1052                 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
1053                                                 &lbase, NULL);
1054                 loff = (int)(uio->uio_offset - lbase);
1055
1056                 KKASSERT(lblksize <= 65536);
1057
1058                 /*
1059                  * Calculate bytes to copy this transfer and whether the
1060                  * copy completely covers the buffer or not.
1061                  */
1062                 trivial = 0;
1063                 n = lblksize - loff;
1064                 if (n > uio->uio_resid) {
1065                         n = uio->uio_resid;
1066                         if (loff == lbase && uio->uio_offset + n == new_eof)
1067                                 trivial = 1;
1068                         endofblk = 0;
1069                 } else {
1070                         if (loff == 0)
1071                                 trivial = 1;
1072                         endofblk = 1;
1073                 }
1074
1075                 /*
1076                  * Get the buffer
1077                  */
1078                 if (uio->uio_segflg == UIO_NOCOPY) {
1079                         /*
1080                          * Issuing a write with the same data backing the
1081                          * buffer.  Instantiate the buffer to collect the
1082                          * backing vm pages, then read-in any missing bits.
1083                          *
1084                          * This case is used by vop_stdputpages().
1085                          */
1086                         bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
1087                         if ((bp->b_flags & B_CACHE) == 0) {
1088                                 bqrelse(bp);
1089                                 error = bread(ip->vp, lbase, lblksize, &bp);
1090                         }
1091                 } else if (trivial) {
1092                         /*
1093                          * Even though we are entirely overwriting the buffer
1094                          * we may still have to zero it out to avoid a
1095                          * mmap/write visibility issue.
1096                          */
1097                         bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
1098                         if ((bp->b_flags & B_CACHE) == 0)
1099                                 vfs_bio_clrbuf(bp);
1100                 } else {
1101                         /*
1102                          * Partial overwrite, read in any missing bits then
1103                          * replace the portion being written.
1104                          *
1105                          * (The strategy code will detect zero-fill physical
1106                          * blocks for this case).
1107                          */
1108                         error = bread(ip->vp, lbase, lblksize, &bp);
1109                         if (error == 0)
1110                                 bheavy(bp);
1111                 }
1112
1113                 if (error) {
1114                         brelse(bp);
1115                         break;
1116                 }
1117
1118                 /*
1119                  * Ok, copy the data in
1120                  */
1121                 error = uiomove(bp->b_data + loff, n, uio);
1122                 kflags |= NOTE_WRITE;
1123                 modified = 1;
1124                 if (error) {
1125                         brelse(bp);
1126                         break;
1127                 }
1128
1129                 /*
1130                  * WARNING: Pageout daemon will issue UIO_NOCOPY writes
1131                  *          with IO_SYNC or IO_ASYNC set.  These writes
1132                  *          must be handled as the pageout daemon expects.
1133                  */
1134                 if (ioflag & IO_SYNC) {
1135                         bwrite(bp);
1136                 } else if ((ioflag & IO_DIRECT) && endofblk) {
1137                         bawrite(bp);
1138                 } else if (ioflag & IO_ASYNC) {
1139                         bawrite(bp);
1140                 } else {
1141                         bdwrite(bp);
1142                 }
1143         }
1144
1145         /*
1146          * Cleanup.  If we extended the file EOF but failed to write through
1147          * the entire write is a failure and we have to back-up.
1148          */
1149         if (error && new_eof != old_eof) {
1150                 hammer2_truncate_file(ip, old_eof);
1151         } else if (modified) {
1152                 hammer2_mtx_ex(&ip->lock);
1153                 hammer2_update_time(&ip->mtime);
1154                 atomic_set_int(&ip->flags, HAMMER2_INODE_MTIME);
1155                 hammer2_mtx_unlock(&ip->lock);
1156         }
1157         atomic_set_int(&ip->flags, HAMMER2_INODE_MODIFIED);
1158         hammer2_knote(ip->vp, kflags);
1159         vsetisdirty(ip->vp);
1160
1161         return error;
1162 }
1163
1164 /*
1165  * Truncate the size of a file.  The inode must not be locked.
1166  *
1167  * NOTE:    Caller handles setting HAMMER2_INODE_MODIFIED
1168  *
1169  * WARNING: nvtruncbuf() can only be safely called without the inode lock
1170  *          held due to the way our write thread works.
1171  *
1172  * WARNING! Assumes that the kernel interlocks size changes at the
1173  *          vnode level.
1174  */
1175 static
1176 void
1177 hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1178 {
1179         hammer2_key_t lbase;
1180         int nblksize;
1181
1182         LOCKSTART;
1183         if (ip->vp) {
1184                 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL);
1185                 nvtruncbuf(ip->vp, nsize,
1186                            nblksize, (int)nsize & (nblksize - 1),
1187                            0);
1188         }
1189         hammer2_mtx_ex(&ip->lock);
1190         ip->size = nsize;
1191         atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED);
1192         hammer2_mtx_unlock(&ip->lock);
1193         LOCKSTOP;
1194 }
1195
1196 /*
1197  * Extend the size of a file.  The inode must not be locked.
1198  *
1199  * WARNING! Assumes that the kernel interlocks size changes at the
1200  *          vnode level.
1201  *
1202  * NOTE: Caller handles setting HAMMER2_INODE_MODIFIED
1203  */
1204 static
1205 void
1206 hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1207 {
1208         hammer2_key_t lbase;
1209         hammer2_key_t osize;
1210         int oblksize;
1211         int nblksize;
1212
1213         LOCKSTART;
1214         hammer2_mtx_ex(&ip->lock);
1215         osize = ip->size;
1216         ip->size = nsize;
1217         hammer2_mtx_unlock(&ip->lock);
1218
1219         if (ip->vp) {
1220                 oblksize = hammer2_calc_logical(ip, osize, &lbase, NULL);
1221                 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL);
1222                 nvextendbuf(ip->vp,
1223                             osize, nsize,
1224                             oblksize, nblksize,
1225                             -1, -1, 0);
1226         }
1227         atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED);
1228         LOCKSTOP;
1229 }
1230
1231 static
1232 int
1233 hammer2_vop_nresolve(struct vop_nresolve_args *ap)
1234 {
1235         hammer2_inode_t *ip;
1236         hammer2_inode_t *dip;
1237         hammer2_cluster_t *cparent;
1238         hammer2_cluster_t *cluster;
1239         const hammer2_inode_data_t *ripdata;
1240         hammer2_key_t key_next;
1241         hammer2_key_t lhc;
1242         struct namecache *ncp;
1243         const uint8_t *name;
1244         size_t name_len;
1245         int error = 0;
1246         int ddflag;
1247         struct vnode *vp;
1248
1249         LOCKSTART;
1250         dip = VTOI(ap->a_dvp);
1251         ncp = ap->a_nch->ncp;
1252         name = ncp->nc_name;
1253         name_len = ncp->nc_nlen;
1254         lhc = hammer2_dirhash(name, name_len);
1255
1256         /*
1257          * Note: In DragonFly the kernel handles '.' and '..'.
1258          */
1259         cparent = hammer2_inode_lock_sh(dip);
1260         cluster = hammer2_cluster_lookup(cparent, &key_next,
1261                                          lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1262                                          HAMMER2_LOOKUP_SHARED, &ddflag);
1263         while (cluster) {
1264                 if (hammer2_cluster_type(cluster) == HAMMER2_BREF_TYPE_INODE) {
1265                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1266                         if (ripdata->name_len == name_len &&
1267                             bcmp(ripdata->filename, name, name_len) == 0) {
1268                                 break;
1269                         }
1270                 }
1271                 cluster = hammer2_cluster_next(cparent, cluster, &key_next,
1272                                                key_next,
1273                                                lhc + HAMMER2_DIRHASH_LOMASK,
1274                                                HAMMER2_LOOKUP_SHARED);
1275         }
1276         hammer2_inode_unlock_sh(dip, cparent);
1277
1278         /*
1279          * Resolve hardlink entries before acquiring the inode.
1280          */
1281         if (cluster) {
1282                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1283                 if (ripdata->type == HAMMER2_OBJTYPE_HARDLINK) {
1284                         hammer2_tid_t inum = ripdata->inum;
1285                         error = hammer2_hardlink_find(dip, NULL, cluster);
1286                         if (error) {
1287                                 kprintf("hammer2: unable to find hardlink "
1288                                         "0x%016jx\n", inum);
1289                                 hammer2_cluster_unlock(cluster);
1290                                 LOCKSTOP;
1291                                 return error;
1292                         }
1293                 }
1294         }
1295
1296         /*
1297          * nresolve needs to resolve hardlinks, the original cluster is not
1298          * sufficient.
1299          */
1300         if (cluster) {
1301                 ip = hammer2_inode_get(dip->pmp, dip, cluster);
1302                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1303                 if (ripdata->type == HAMMER2_OBJTYPE_HARDLINK) {
1304                         kprintf("nresolve: fixup hardlink\n");
1305                         hammer2_inode_ref(ip);
1306                         hammer2_inode_unlock_ex(ip, NULL);
1307                         hammer2_cluster_unlock(cluster);
1308                         cluster = hammer2_inode_lock_ex(ip);
1309                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1310                         hammer2_inode_drop(ip);
1311                         kprintf("nresolve: fixup to type %02x\n",
1312                                 ripdata->type);
1313                 }
1314         } else {
1315                 ip = NULL;
1316         }
1317
1318 #if 0
1319         /*
1320          * Deconsolidate any hardlink whos nlinks == 1.  Ignore errors.
1321          * If an error occurs chain and ip are left alone.
1322          *
1323          * XXX upgrade shared lock?
1324          */
1325         if (ochain && chain &&
1326             chain->data->ipdata.nlinks == 1 && !dip->pmp->ronly) {
1327                 kprintf("hammer2: need to unconsolidate hardlink for %s\n",
1328                         chain->data->ipdata.filename);
1329                 /* XXX retain shared lock on dip? (currently not held) */
1330                 hammer2_trans_init(&trans, dip->pmp, 0);
1331                 hammer2_hardlink_deconsolidate(&trans, dip, &chain, &ochain);
1332                 hammer2_trans_done(&trans);
1333         }
1334 #endif
1335
1336         /*
1337          * Acquire the related vnode
1338          *
1339          * NOTE: For error processing, only ENOENT resolves the namecache
1340          *       entry to NULL, otherwise we just return the error and
1341          *       leave the namecache unresolved.
1342          *
1343          * NOTE: multiple hammer2_inode structures can be aliased to the
1344          *       same chain element, for example for hardlinks.  This
1345          *       use case does not 'reattach' inode associations that
1346          *       might already exist, but always allocates a new one.
1347          *
1348          * WARNING: inode structure is locked exclusively via inode_get
1349          *          but chain was locked shared.  inode_unlock_ex()
1350          *          will handle it properly.
1351          */
1352         if (cluster) {
1353                 vp = hammer2_igetv(ip, cluster, &error);
1354                 if (error == 0) {
1355                         vn_unlock(vp);
1356                         cache_setvp(ap->a_nch, vp);
1357                 } else if (error == ENOENT) {
1358                         cache_setvp(ap->a_nch, NULL);
1359                 }
1360                 hammer2_inode_unlock_ex(ip, cluster);
1361
1362                 /*
1363                  * The vp should not be released until after we've disposed
1364                  * of our locks, because it might cause vop_inactive() to
1365                  * be called.
1366                  */
1367                 if (vp)
1368                         vrele(vp);
1369         } else {
1370                 error = ENOENT;
1371                 cache_setvp(ap->a_nch, NULL);
1372         }
1373         KASSERT(error || ap->a_nch->ncp->nc_vp != NULL,
1374                 ("resolve error %d/%p ap %p\n",
1375                  error, ap->a_nch->ncp->nc_vp, ap));
1376         LOCKSTOP;
1377         return error;
1378 }
1379
1380 static
1381 int
1382 hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
1383 {
1384         hammer2_inode_t *dip;
1385         hammer2_inode_t *ip;
1386         hammer2_cluster_t *cparent;
1387         int error;
1388
1389         LOCKSTART;
1390         dip = VTOI(ap->a_dvp);
1391
1392         if ((ip = dip->pip) == NULL) {
1393                 *ap->a_vpp = NULL;
1394                 LOCKSTOP;
1395                 return ENOENT;
1396         }
1397         cparent = hammer2_inode_lock_ex(ip);
1398         *ap->a_vpp = hammer2_igetv(ip, cparent, &error);
1399         hammer2_inode_unlock_ex(ip, cparent);
1400
1401         LOCKSTOP;
1402         return error;
1403 }
1404
1405 static
1406 int
1407 hammer2_vop_nmkdir(struct vop_nmkdir_args *ap)
1408 {
1409         hammer2_inode_t *dip;
1410         hammer2_inode_t *nip;
1411         hammer2_trans_t trans;
1412         hammer2_cluster_t *cluster;
1413         struct namecache *ncp;
1414         const uint8_t *name;
1415         size_t name_len;
1416         int error;
1417
1418         LOCKSTART;
1419         dip = VTOI(ap->a_dvp);
1420         if (dip->pmp->ronly) {
1421                 LOCKSTOP;
1422                 return (EROFS);
1423         }
1424
1425         ncp = ap->a_nch->ncp;
1426         name = ncp->nc_name;
1427         name_len = ncp->nc_nlen;
1428         cluster = NULL;
1429
1430         hammer2_pfs_memory_wait(dip->pmp);
1431         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1432         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1433                                    name, name_len,
1434                                    &cluster, 0, &error);
1435         if (error) {
1436                 KKASSERT(nip == NULL);
1437                 *ap->a_vpp = NULL;
1438         } else {
1439                 *ap->a_vpp = hammer2_igetv(nip, cluster, &error);
1440                 hammer2_inode_unlock_ex(nip, cluster);
1441         }
1442         hammer2_trans_done(&trans);
1443
1444         if (error == 0) {
1445                 cache_setunresolved(ap->a_nch);
1446                 cache_setvp(ap->a_nch, *ap->a_vpp);
1447         }
1448         LOCKSTOP;
1449         return error;
1450 }
1451
1452 /*
1453  * Return the largest contiguous physical disk range for the logical
1454  * request, in bytes.
1455  *
1456  * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
1457  *
1458  * Basically disabled, the logical buffer write thread has to deal with
1459  * buffers one-at-a-time.
1460  */
1461 static
1462 int
1463 hammer2_vop_bmap(struct vop_bmap_args *ap)
1464 {
1465         *ap->a_doffsetp = NOOFFSET;
1466         if (ap->a_runp)
1467                 *ap->a_runp = 0;
1468         if (ap->a_runb)
1469                 *ap->a_runb = 0;
1470         return (EOPNOTSUPP);
1471 }
1472
1473 static
1474 int
1475 hammer2_vop_open(struct vop_open_args *ap)
1476 {
1477         return vop_stdopen(ap);
1478 }
1479
1480 /*
1481  * hammer2_vop_advlock { vp, id, op, fl, flags }
1482  */
1483 static
1484 int
1485 hammer2_vop_advlock(struct vop_advlock_args *ap)
1486 {
1487         hammer2_inode_t *ip = VTOI(ap->a_vp);
1488         const hammer2_inode_data_t *ripdata;
1489         hammer2_cluster_t *cparent;
1490         hammer2_off_t size;
1491
1492         cparent = hammer2_inode_lock_sh(ip);
1493         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
1494         size = ripdata->size;
1495         hammer2_inode_unlock_sh(ip, cparent);
1496         return (lf_advlock(ap, &ip->advlock, size));
1497 }
1498
1499
1500 static
1501 int
1502 hammer2_vop_close(struct vop_close_args *ap)
1503 {
1504         return vop_stdclose(ap);
1505 }
1506
1507 /*
1508  * hammer2_vop_nlink { nch, dvp, vp, cred }
1509  *
1510  * Create a hardlink from (vp) to {dvp, nch}.
1511  */
1512 static
1513 int
1514 hammer2_vop_nlink(struct vop_nlink_args *ap)
1515 {
1516         hammer2_inode_t *fdip;  /* target directory to create link in */
1517         hammer2_inode_t *tdip;  /* target directory to create link in */
1518         hammer2_inode_t *cdip;  /* common parent directory */
1519         hammer2_inode_t *ip;    /* inode we are hardlinking to */
1520         hammer2_cluster_t *cluster;
1521         hammer2_cluster_t *fdcluster;
1522         hammer2_cluster_t *tdcluster;
1523         hammer2_cluster_t *cdcluster;
1524         hammer2_trans_t trans;
1525         struct namecache *ncp;
1526         const uint8_t *name;
1527         size_t name_len;
1528         int error;
1529
1530         LOCKSTART;
1531         tdip = VTOI(ap->a_dvp);
1532         if (tdip->pmp->ronly) {
1533                 LOCKSTOP;
1534                 return (EROFS);
1535         }
1536
1537         ncp = ap->a_nch->ncp;
1538         name = ncp->nc_name;
1539         name_len = ncp->nc_nlen;
1540
1541         /*
1542          * ip represents the file being hardlinked.  The file could be a
1543          * normal file or a hardlink target if it has already been hardlinked.
1544          * If ip is a hardlinked target then ip->pip represents the location
1545          * of the hardlinked target, NOT the location of the hardlink pointer.
1546          *
1547          * Bump nlinks and potentially also create or move the hardlink
1548          * target in the parent directory common to (ip) and (tdip).  The
1549          * consolidation code can modify ip->cluster and ip->pip.  The
1550          * returned cluster is locked.
1551          */
1552         ip = VTOI(ap->a_vp);
1553         hammer2_pfs_memory_wait(ip->pmp);
1554         hammer2_trans_init(&trans, ip->pmp, HAMMER2_TRANS_NEWINODE);
1555
1556         /*
1557          * The common parent directory must be locked first to avoid deadlocks.
1558          * Also note that fdip and/or tdip might match cdip.
1559          */
1560         fdip = ip->pip;
1561         cdip = hammer2_inode_common_parent(fdip, tdip);
1562         cdcluster = hammer2_inode_lock_ex(cdip);
1563         fdcluster = hammer2_inode_lock_ex(fdip);
1564         tdcluster = hammer2_inode_lock_ex(tdip);
1565         cluster = hammer2_inode_lock_ex(ip);
1566         error = hammer2_hardlink_consolidate(&trans, ip, &cluster,
1567                                              cdip, cdcluster, 1);
1568         if (error)
1569                 goto done;
1570
1571         /*
1572          * Create a directory entry connected to the specified cluster.
1573          *
1574          * WARNING! chain can get moved by the connect (indirectly due to
1575          *          potential indirect block creation).
1576          */
1577         error = hammer2_inode_connect(&trans, &cluster, 1,
1578                                       tdip, tdcluster,
1579                                       name, name_len, 0);
1580         if (error == 0) {
1581                 cache_setunresolved(ap->a_nch);
1582                 cache_setvp(ap->a_nch, ap->a_vp);
1583         }
1584 done:
1585         hammer2_inode_unlock_ex(ip, cluster);
1586         hammer2_inode_unlock_ex(tdip, tdcluster);
1587         hammer2_inode_unlock_ex(fdip, fdcluster);
1588         hammer2_inode_unlock_ex(cdip, cdcluster);
1589         hammer2_inode_drop(cdip);
1590         hammer2_trans_done(&trans);
1591
1592         LOCKSTOP;
1593         return error;
1594 }
1595
1596 /*
1597  * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap }
1598  *
1599  * The operating system has already ensured that the directory entry
1600  * does not exist and done all appropriate namespace locking.
1601  */
1602 static
1603 int
1604 hammer2_vop_ncreate(struct vop_ncreate_args *ap)
1605 {
1606         hammer2_inode_t *dip;
1607         hammer2_inode_t *nip;
1608         hammer2_trans_t trans;
1609         hammer2_cluster_t *ncluster;
1610         struct namecache *ncp;
1611         const uint8_t *name;
1612         size_t name_len;
1613         int error;
1614
1615         LOCKSTART;
1616         dip = VTOI(ap->a_dvp);
1617         if (dip->pmp->ronly) {
1618                 LOCKSTOP;
1619                 return (EROFS);
1620         }
1621
1622         ncp = ap->a_nch->ncp;
1623         name = ncp->nc_name;
1624         name_len = ncp->nc_nlen;
1625         hammer2_pfs_memory_wait(dip->pmp);
1626         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1627         ncluster = NULL;
1628
1629         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1630                                    name, name_len,
1631                                    &ncluster, 0, &error);
1632         if (error) {
1633                 KKASSERT(nip == NULL);
1634                 *ap->a_vpp = NULL;
1635         } else {
1636                 *ap->a_vpp = hammer2_igetv(nip, ncluster, &error);
1637                 hammer2_inode_unlock_ex(nip, ncluster);
1638         }
1639         hammer2_trans_done(&trans);
1640
1641         if (error == 0) {
1642                 cache_setunresolved(ap->a_nch);
1643                 cache_setvp(ap->a_nch, *ap->a_vpp);
1644         }
1645         LOCKSTOP;
1646         return error;
1647 }
1648
1649 /*
1650  * Make a device node (typically a fifo)
1651  */
1652 static
1653 int
1654 hammer2_vop_nmknod(struct vop_nmknod_args *ap)
1655 {
1656         hammer2_inode_t *dip;
1657         hammer2_inode_t *nip;
1658         hammer2_trans_t trans;
1659         hammer2_cluster_t *ncluster;
1660         struct namecache *ncp;
1661         const uint8_t *name;
1662         size_t name_len;
1663         int error;
1664
1665         LOCKSTART;
1666         dip = VTOI(ap->a_dvp);
1667         if (dip->pmp->ronly) {
1668                 LOCKSTOP;
1669                 return (EROFS);
1670         }
1671
1672         ncp = ap->a_nch->ncp;
1673         name = ncp->nc_name;
1674         name_len = ncp->nc_nlen;
1675         hammer2_pfs_memory_wait(dip->pmp);
1676         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1677         ncluster = NULL;
1678
1679         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1680                                    name, name_len,
1681                                    &ncluster, 0, &error);
1682         if (error) {
1683                 KKASSERT(nip == NULL);
1684                 *ap->a_vpp = NULL;
1685         } else {
1686                 *ap->a_vpp = hammer2_igetv(nip, ncluster, &error);
1687                 hammer2_inode_unlock_ex(nip, ncluster);
1688         }
1689         hammer2_trans_done(&trans);
1690
1691         if (error == 0) {
1692                 cache_setunresolved(ap->a_nch);
1693                 cache_setvp(ap->a_nch, *ap->a_vpp);
1694         }
1695         LOCKSTOP;
1696         return error;
1697 }
1698
1699 /*
1700  * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1701  */
1702 static
1703 int
1704 hammer2_vop_nsymlink(struct vop_nsymlink_args *ap)
1705 {
1706         hammer2_inode_t *dip;
1707         hammer2_inode_t *nip;
1708         hammer2_cluster_t *ncparent;
1709         hammer2_trans_t trans;
1710         struct namecache *ncp;
1711         const uint8_t *name;
1712         size_t name_len;
1713         int error;
1714
1715         dip = VTOI(ap->a_dvp);
1716         if (dip->pmp->ronly)
1717                 return (EROFS);
1718
1719         ncp = ap->a_nch->ncp;
1720         name = ncp->nc_name;
1721         name_len = ncp->nc_nlen;
1722         hammer2_pfs_memory_wait(dip->pmp);
1723         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1724         ncparent = NULL;
1725
1726         ap->a_vap->va_type = VLNK;      /* enforce type */
1727
1728         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1729                                    name, name_len,
1730                                    &ncparent, 0, &error);
1731         if (error) {
1732                 KKASSERT(nip == NULL);
1733                 *ap->a_vpp = NULL;
1734                 hammer2_trans_done(&trans);
1735                 return error;
1736         }
1737         *ap->a_vpp = hammer2_igetv(nip, ncparent, &error);
1738
1739         /*
1740          * Build the softlink (~like file data) and finalize the namecache.
1741          */
1742         if (error == 0) {
1743                 size_t bytes;
1744                 struct uio auio;
1745                 struct iovec aiov;
1746                 hammer2_inode_data_t *nipdata;
1747
1748                 nipdata = &hammer2_cluster_wdata(ncparent)->ipdata;
1749                 /* nipdata = &nip->chain->data->ipdata;XXX */
1750                 bytes = strlen(ap->a_target);
1751
1752                 if (bytes <= HAMMER2_EMBEDDED_BYTES) {
1753                         KKASSERT(nipdata->op_flags &
1754                                  HAMMER2_OPFLAG_DIRECTDATA);
1755                         bcopy(ap->a_target, nipdata->u.data, bytes);
1756                         nipdata->size = bytes;
1757                         nip->size = bytes;
1758                         hammer2_cluster_modsync(ncparent);
1759                         hammer2_inode_unlock_ex(nip, ncparent);
1760                         /* nipdata = NULL; not needed */
1761                 } else {
1762                         hammer2_inode_unlock_ex(nip, ncparent);
1763                         /* nipdata = NULL; not needed */
1764                         bzero(&auio, sizeof(auio));
1765                         bzero(&aiov, sizeof(aiov));
1766                         auio.uio_iov = &aiov;
1767                         auio.uio_segflg = UIO_SYSSPACE;
1768                         auio.uio_rw = UIO_WRITE;
1769                         auio.uio_resid = bytes;
1770                         auio.uio_iovcnt = 1;
1771                         auio.uio_td = curthread;
1772                         aiov.iov_base = ap->a_target;
1773                         aiov.iov_len = bytes;
1774                         error = hammer2_write_file(nip, &auio, IO_APPEND, 0);
1775                         /* XXX handle error */
1776                         error = 0;
1777                 }
1778         } else {
1779                 hammer2_inode_unlock_ex(nip, ncparent);
1780         }
1781         hammer2_trans_done(&trans);
1782
1783         /*
1784          * Finalize namecache
1785          */
1786         if (error == 0) {
1787                 cache_setunresolved(ap->a_nch);
1788                 cache_setvp(ap->a_nch, *ap->a_vpp);
1789                 /* hammer2_knote(ap->a_dvp, NOTE_WRITE); */
1790         }
1791         return error;
1792 }
1793
1794 /*
1795  * hammer2_vop_nremove { nch, dvp, cred }
1796  */
1797 static
1798 int
1799 hammer2_vop_nremove(struct vop_nremove_args *ap)
1800 {
1801         hammer2_inode_t *dip;
1802         hammer2_trans_t trans;
1803         struct namecache *ncp;
1804         const uint8_t *name;
1805         size_t name_len;
1806         int error;
1807
1808         LOCKSTART;
1809         dip = VTOI(ap->a_dvp);
1810         if (dip->pmp->ronly) {
1811                 LOCKSTOP;
1812                 return(EROFS);
1813         }
1814
1815         ncp = ap->a_nch->ncp;
1816         name = ncp->nc_name;
1817         name_len = ncp->nc_nlen;
1818
1819         hammer2_pfs_memory_wait(dip->pmp);
1820         hammer2_trans_init(&trans, dip->pmp, 0);
1821         error = hammer2_unlink_file(&trans, dip, name, name_len,
1822                                     0, NULL, ap->a_nch, -1);
1823         hammer2_run_unlinkq(&trans, dip->pmp);
1824         hammer2_trans_done(&trans);
1825         if (error == 0)
1826                 cache_unlink(ap->a_nch);
1827         LOCKSTOP;
1828         return (error);
1829 }
1830
1831 /*
1832  * hammer2_vop_nrmdir { nch, dvp, cred }
1833  */
1834 static
1835 int
1836 hammer2_vop_nrmdir(struct vop_nrmdir_args *ap)
1837 {
1838         hammer2_inode_t *dip;
1839         hammer2_trans_t trans;
1840         struct namecache *ncp;
1841         const uint8_t *name;
1842         size_t name_len;
1843         int error;
1844
1845         LOCKSTART;
1846         dip = VTOI(ap->a_dvp);
1847         if (dip->pmp->ronly) {
1848                 LOCKSTOP;
1849                 return(EROFS);
1850         }
1851
1852         ncp = ap->a_nch->ncp;
1853         name = ncp->nc_name;
1854         name_len = ncp->nc_nlen;
1855
1856         hammer2_pfs_memory_wait(dip->pmp);
1857         hammer2_trans_init(&trans, dip->pmp, 0);
1858         hammer2_run_unlinkq(&trans, dip->pmp);
1859         error = hammer2_unlink_file(&trans, dip, name, name_len,
1860                                     1, NULL, ap->a_nch, -1);
1861         hammer2_trans_done(&trans);
1862         if (error == 0)
1863                 cache_unlink(ap->a_nch);
1864         LOCKSTOP;
1865         return (error);
1866 }
1867
1868 /*
1869  * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1870  */
1871 static
1872 int
1873 hammer2_vop_nrename(struct vop_nrename_args *ap)
1874 {
1875         struct namecache *fncp;
1876         struct namecache *tncp;
1877         hammer2_inode_t *cdip;
1878         hammer2_inode_t *fdip;
1879         hammer2_inode_t *tdip;
1880         hammer2_inode_t *ip;
1881         hammer2_cluster_t *cluster;
1882         hammer2_cluster_t *fdcluster;
1883         hammer2_cluster_t *tdcluster;
1884         hammer2_cluster_t *cdcluster;
1885         hammer2_trans_t trans;
1886         const uint8_t *fname;
1887         size_t fname_len;
1888         const uint8_t *tname;
1889         size_t tname_len;
1890         int error;
1891         int tnch_error;
1892         int hlink;
1893
1894         if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1895                 return(EXDEV);
1896         if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1897                 return(EXDEV);
1898
1899         fdip = VTOI(ap->a_fdvp);        /* source directory */
1900         tdip = VTOI(ap->a_tdvp);        /* target directory */
1901
1902         if (fdip->pmp->ronly)
1903                 return(EROFS);
1904
1905         LOCKSTART;
1906         fncp = ap->a_fnch->ncp;         /* entry name in source */
1907         fname = fncp->nc_name;
1908         fname_len = fncp->nc_nlen;
1909
1910         tncp = ap->a_tnch->ncp;         /* entry name in target */
1911         tname = tncp->nc_name;
1912         tname_len = tncp->nc_nlen;
1913
1914         hammer2_pfs_memory_wait(tdip->pmp);
1915         hammer2_trans_init(&trans, tdip->pmp, 0);
1916
1917         /*
1918          * ip is the inode being renamed.  If this is a hardlink then
1919          * ip represents the actual file and not the hardlink marker.
1920          */
1921         ip = VTOI(fncp->nc_vp);
1922         cluster = NULL;
1923
1924
1925         /*
1926          * The common parent directory must be locked first to avoid deadlocks.
1927          * Also note that fdip and/or tdip might match cdip.
1928          *
1929          * WARNING! fdip may not match ip->pip.  That is, if the source file
1930          *          is already a hardlink then what we are renaming is the
1931          *          hardlink pointer, not the hardlink itself.  The hardlink
1932          *          directory (ip->pip) will already be at a common parent
1933          *          of fdrip.
1934          *
1935          *          Be sure to use ip->pip when finding the common parent
1936          *          against tdip or we might accidently move the hardlink
1937          *          target into a subdirectory that makes it inaccessible to
1938          *          other pointers.
1939          */
1940         cdip = hammer2_inode_common_parent(ip->pip, tdip);
1941         cdcluster = hammer2_inode_lock_ex(cdip);
1942         fdcluster = hammer2_inode_lock_ex(fdip);
1943         tdcluster = hammer2_inode_lock_ex(tdip);
1944
1945         /*
1946          * Keep a tight grip on the inode so the temporary unlinking from
1947          * the source location prior to linking to the target location
1948          * does not cause the cluster to be destroyed.
1949          *
1950          * NOTE: To avoid deadlocks we cannot lock (ip) while we are
1951          *       unlinking elements from their directories.  Locking
1952          *       the nlinks field does not lock the whole inode.
1953          */
1954         hammer2_inode_ref(ip);
1955
1956         /*
1957          * Remove target if it exists.
1958          */
1959         error = hammer2_unlink_file(&trans, tdip, tname, tname_len,
1960                                     -1, NULL, ap->a_tnch, -1);
1961         tnch_error = error;
1962         if (error && error != ENOENT)
1963                 goto done;
1964
1965         /*
1966          * When renaming a hardlinked file we may have to re-consolidate
1967          * the location of the hardlink target.
1968          *
1969          * If ip represents a regular file the consolidation code essentially
1970          * does nothing other than return the same locked cluster that was
1971          * passed in.
1972          *
1973          * The returned cluster will be locked.
1974          *
1975          * WARNING!  We do not currently have a local copy of ipdata but
1976          *           we do use one later remember that it must be reloaded
1977          *           on any modification to the inode, including connects.
1978          */
1979         cluster = hammer2_inode_lock_ex(ip);
1980         error = hammer2_hardlink_consolidate(&trans, ip, &cluster,
1981                                              cdip, cdcluster, 0);
1982         if (error)
1983                 goto done;
1984
1985         /*
1986          * Disconnect (fdip, fname) from the source directory.  This will
1987          * disconnect (ip) if it represents a direct file.  If (ip) represents
1988          * a hardlink the HARDLINK pointer object will be removed but the
1989          * hardlink will stay intact.
1990          *
1991          * Always pass nch as NULL because we intend to reconnect the inode,
1992          * so we don't want hammer2_unlink_file() to rename it to the hidden
1993          * open-but-unlinked directory.
1994          *
1995          * The target cluster may be marked DELETED but will not be destroyed
1996          * since we retain our hold on ip and cluster.
1997          *
1998          * NOTE: We pass nlinks as 0 (not -1) in order to retain the file's
1999          *       link count.
2000          */
2001         error = hammer2_unlink_file(&trans, fdip, fname, fname_len,
2002                                     -1, &hlink, NULL, 0);
2003         KKASSERT(error != EAGAIN);
2004         if (error)
2005                 goto done;
2006
2007         /*
2008          * Reconnect ip to target directory using cluster.  Chains cannot
2009          * actually be moved, so this will duplicate the cluster in the new
2010          * spot and assign it to the ip, replacing the old cluster.
2011          *
2012          * WARNING: Because recursive locks are allowed and we unlinked the
2013          *          file that we have a cluster-in-hand for just above, the
2014          *          cluster might have been delete-duplicated.  We must
2015          *          refactor the cluster.
2016          *
2017          * WARNING: Chain locks can lock buffer cache buffers, to avoid
2018          *          deadlocks we want to unlock before issuing a cache_*()
2019          *          op (that might have to lock a vnode).
2020          *
2021          * NOTE:    Pass nlinks as 0 because we retained the link count from
2022          *          the unlink, so we do not have to modify it.
2023          */
2024         error = hammer2_inode_connect(&trans, &cluster, hlink,
2025                                       tdip, tdcluster,
2026                                       tname, tname_len, 0);
2027         if (error == 0) {
2028                 KKASSERT(cluster != NULL);
2029                 hammer2_inode_repoint(ip, (hlink ? ip->pip : tdip), cluster);
2030         }
2031 done:
2032         hammer2_inode_unlock_ex(ip, cluster);
2033         hammer2_inode_unlock_ex(tdip, tdcluster);
2034         hammer2_inode_unlock_ex(fdip, fdcluster);
2035         hammer2_inode_unlock_ex(cdip, cdcluster);
2036         hammer2_inode_drop(ip);
2037         hammer2_inode_drop(cdip);
2038         hammer2_run_unlinkq(&trans, fdip->pmp);
2039         hammer2_trans_done(&trans);
2040
2041         /*
2042          * Issue the namecache update after unlocking all the internal
2043          * hammer structures, otherwise we might deadlock.
2044          */
2045         if (tnch_error == 0) {
2046                 cache_unlink(ap->a_tnch);
2047                 cache_setunresolved(ap->a_tnch);
2048         }
2049         if (error == 0)
2050                 cache_rename(ap->a_fnch, ap->a_tnch);
2051
2052         LOCKSTOP;
2053         return (error);
2054 }
2055
2056 /*
2057  * Strategy code (async logical file buffer I/O from system)
2058  *
2059  * WARNING: The strategy code cannot safely use hammer2 transactions
2060  *          as this can deadlock against vfs_sync's vfsync() call
2061  *          if multiple flushes are queued.  All H2 structures must
2062  *          already be present and ready for the DIO.
2063  *
2064  *          Reads can be initiated asynchronously, writes have to be
2065  *          spooled to a separate thread for action to avoid deadlocks.
2066  */
2067 static int hammer2_strategy_read(struct vop_strategy_args *ap);
2068 static int hammer2_strategy_write(struct vop_strategy_args *ap);
2069 static void hammer2_strategy_read_callback(hammer2_iocb_t *iocb);
2070
2071 static
2072 int
2073 hammer2_vop_strategy(struct vop_strategy_args *ap)
2074 {
2075         struct bio *biop;
2076         struct buf *bp;
2077         int error;
2078
2079         biop = ap->a_bio;
2080         bp = biop->bio_buf;
2081
2082         switch(bp->b_cmd) {
2083         case BUF_CMD_READ:
2084                 error = hammer2_strategy_read(ap);
2085                 ++hammer2_iod_file_read;
2086                 break;
2087         case BUF_CMD_WRITE:
2088                 error = hammer2_strategy_write(ap);
2089                 ++hammer2_iod_file_write;
2090                 break;
2091         default:
2092                 bp->b_error = error = EINVAL;
2093                 bp->b_flags |= B_ERROR;
2094                 biodone(biop);
2095                 break;
2096         }
2097         return (error);
2098 }
2099
2100 /*
2101  * Logical buffer I/O, async read.
2102  */
2103 static
2104 int
2105 hammer2_strategy_read(struct vop_strategy_args *ap)
2106 {
2107         struct buf *bp;
2108         struct bio *bio;
2109         struct bio *nbio;
2110         hammer2_inode_t *ip;
2111         hammer2_cluster_t *cparent;
2112         hammer2_cluster_t *cluster;
2113         hammer2_key_t key_dummy;
2114         hammer2_key_t lbase;
2115         int ddflag;
2116         uint8_t btype;
2117
2118         bio = ap->a_bio;
2119         bp = bio->bio_buf;
2120         ip = VTOI(ap->a_vp);
2121         nbio = push_bio(bio);
2122
2123         lbase = bio->bio_offset;
2124         KKASSERT(((int)lbase & HAMMER2_PBUFMASK) == 0);
2125
2126         /*
2127          * Lookup the file offset.
2128          */
2129         cparent = hammer2_inode_lock_sh(ip);
2130         cluster = hammer2_cluster_lookup(cparent, &key_dummy,
2131                                        lbase, lbase,
2132                                        HAMMER2_LOOKUP_NODATA |
2133                                        HAMMER2_LOOKUP_SHARED,
2134                                        &ddflag);
2135         hammer2_inode_unlock_sh(ip, cparent);
2136
2137         /*
2138          * Data is zero-fill if no cluster could be found
2139          * (XXX or EIO on a cluster failure).
2140          */
2141         if (cluster == NULL) {
2142                 bp->b_resid = 0;
2143                 bp->b_error = 0;
2144                 bzero(bp->b_data, bp->b_bcount);
2145                 biodone(nbio);
2146                 return(0);
2147         }
2148
2149         /*
2150          * Cluster elements must be type INODE or type DATA, but the
2151          * compression mode (or not) for DATA chains can be different for
2152          * each chain.  This will be handled by the callback.
2153          *
2154          * If the cluster already has valid data the callback will be made
2155          * immediately/synchronously.
2156          */
2157         btype = hammer2_cluster_type(cluster);
2158         if (btype != HAMMER2_BREF_TYPE_INODE &&
2159             btype != HAMMER2_BREF_TYPE_DATA) {
2160                 panic("READ PATH: hammer2_strategy_read: unknown bref type");
2161         }
2162         hammer2_cluster_load_async(cluster, hammer2_strategy_read_callback,
2163                                    nbio);
2164         return(0);
2165 }
2166
2167 /*
2168  * Read callback for hammer2_cluster_load_async().  The load function may
2169  * start several actual I/Os but will only make one callback, typically with
2170  * the first valid I/O XXX
2171  */
2172 static
2173 void
2174 hammer2_strategy_read_callback(hammer2_iocb_t *iocb)
2175 {
2176         struct bio *bio = iocb->ptr;    /* original logical buffer */
2177         struct buf *bp = bio->bio_buf;  /* original logical buffer */
2178         hammer2_chain_t *chain;
2179         hammer2_cluster_t *cluster;
2180         hammer2_io_t *dio;
2181         char *data;
2182         int i;
2183
2184         /*
2185          * Extract data and handle iteration on I/O failure.  iocb->off
2186          * is the cluster index for iteration.
2187          */
2188         cluster = iocb->cluster;
2189         dio = iocb->dio;        /* can be NULL if iocb not in progress */
2190
2191         /*
2192          * Work to do if INPROG set, else dio is already good or dio is
2193          * NULL (which is the shortcut case if chain->data is already good).
2194          */
2195         if (iocb->flags & HAMMER2_IOCB_INPROG) {
2196                 /*
2197                  * Read attempt not yet made.  Issue an asynchronous read
2198                  * if necessary and return, operation will chain back to
2199                  * this function.
2200                  */
2201                 if ((iocb->flags & HAMMER2_IOCB_READ) == 0) {
2202                         if (dio->bp == NULL ||
2203                             (dio->bp->b_flags & B_CACHE) == 0) {
2204                                 if (dio->bp) {
2205                                         bqrelse(dio->bp);
2206                                         dio->bp = NULL;
2207                                 }
2208                                 iocb->flags |= HAMMER2_IOCB_READ;
2209                                 breadcb(dio->hmp->devvp,
2210                                         dio->pbase, dio->psize,
2211                                         hammer2_io_callback, iocb);
2212                                 return;
2213                         }
2214                 }
2215         }
2216
2217         /*
2218          * If we have a DIO it is now done, check for an error and
2219          * calculate the data.
2220          *
2221          * If there is no DIO it is an optimization by
2222          * hammer2_cluster_load_async(), the data is available in
2223          * chain->data.
2224          */
2225         if (dio) {
2226                 if (dio->bp->b_flags & B_ERROR) {
2227                         i = (int)iocb->lbase + 1;
2228                         if (i >= cluster->nchains) {
2229                                 bp->b_flags |= B_ERROR;
2230                                 bp->b_error = dio->bp->b_error;
2231                                 hammer2_io_complete(iocb);
2232                                 biodone(bio);
2233                                 hammer2_cluster_unlock(cluster);
2234                         } else {
2235                                 hammer2_io_complete(iocb); /* XXX */
2236                                 chain = cluster->array[i].chain;
2237                                 kprintf("hammer2: IO CHAIN-%d %p\n", i, chain);
2238                                 hammer2_adjreadcounter(&chain->bref,
2239                                                        chain->bytes);
2240                                 iocb->chain = chain;
2241                                 iocb->lbase = (off_t)i;
2242                                 iocb->flags = 0;
2243                                 iocb->error = 0;
2244                                 hammer2_io_getblk(chain->hmp,
2245                                                   chain->bref.data_off,
2246                                                   chain->bytes,
2247                                                   iocb);
2248                         }
2249                         return;
2250                 }
2251                 chain = iocb->chain;
2252                 data = hammer2_io_data(dio, chain->bref.data_off);
2253         } else {
2254                 /*
2255                  * Special synchronous case, data present in chain->data.
2256                  */
2257                 chain = iocb->chain;
2258                 data = (void *)chain->data;
2259         }
2260
2261         if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
2262                 /*
2263                  * Data is embedded in the inode (copy from inode).
2264                  */
2265                 bcopy(((hammer2_inode_data_t *)data)->u.data,
2266                       bp->b_data, HAMMER2_EMBEDDED_BYTES);
2267                 bzero(bp->b_data + HAMMER2_EMBEDDED_BYTES,
2268                       bp->b_bcount - HAMMER2_EMBEDDED_BYTES);
2269                 bp->b_resid = 0;
2270                 bp->b_error = 0;
2271         } else if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
2272                 /*
2273                  * Data is on-media, issue device I/O and copy.
2274                  *
2275                  * XXX direct-IO shortcut could go here XXX.
2276                  */
2277                 switch (HAMMER2_DEC_COMP(chain->bref.methods)) {
2278                 case HAMMER2_COMP_LZ4:
2279                         hammer2_decompress_LZ4_callback(data, chain->bytes,
2280                                                         bio);
2281                         break;
2282                 case HAMMER2_COMP_ZLIB:
2283                         hammer2_decompress_ZLIB_callback(data, chain->bytes,
2284                                                          bio);
2285                         break;
2286                 case HAMMER2_COMP_NONE:
2287                         KKASSERT(chain->bytes <= bp->b_bcount);
2288                         bcopy(data, bp->b_data, chain->bytes);
2289                         if (chain->bytes < bp->b_bcount) {
2290                                 bzero(bp->b_data + chain->bytes,
2291                                       bp->b_bcount - chain->bytes);
2292                         }
2293                         bp->b_flags |= B_NOTMETA;
2294                         bp->b_resid = 0;
2295                         bp->b_error = 0;
2296                         break;
2297                 default:
2298                         panic("hammer2_strategy_read: "
2299                               "unknown compression type");
2300                 }
2301         } else {
2302                 /* bqrelse the dio to help stabilize the call to panic() */
2303                 if (dio)
2304                         hammer2_io_bqrelse(&dio);
2305                 panic("hammer2_strategy_read: unknown bref type");
2306         }
2307
2308         /*
2309          * Once the iocb is cleaned up the DIO (if any) will no longer be
2310          * in-progress but will still have a ref.  Be sure to release
2311          * the ref.
2312          */
2313         hammer2_io_complete(iocb);              /* physical management */
2314         if (dio)                                /* physical dio & buffer */
2315                 hammer2_io_bqrelse(&dio);
2316         hammer2_cluster_unlock(cluster);        /* cluster management */
2317         biodone(bio);                           /* logical buffer */
2318 }
2319
2320 static
2321 int
2322 hammer2_strategy_write(struct vop_strategy_args *ap)
2323 {
2324         hammer2_pfs_t *pmp;
2325         struct bio *bio;
2326         struct buf *bp;
2327         hammer2_inode_t *ip;
2328
2329         bio = ap->a_bio;
2330         bp = bio->bio_buf;
2331         ip = VTOI(ap->a_vp);
2332         pmp = ip->pmp;
2333
2334         hammer2_lwinprog_ref(pmp);
2335         hammer2_mtx_ex(&pmp->wthread_mtx);
2336         if (TAILQ_EMPTY(&pmp->wthread_bioq.queue)) {
2337                 bioq_insert_tail(&pmp->wthread_bioq, ap->a_bio);
2338                 hammer2_mtx_unlock(&pmp->wthread_mtx);
2339                 wakeup(&pmp->wthread_bioq);
2340         } else {
2341                 bioq_insert_tail(&pmp->wthread_bioq, ap->a_bio);
2342                 hammer2_mtx_unlock(&pmp->wthread_mtx);
2343         }
2344         hammer2_lwinprog_wait(pmp);
2345
2346         return(0);
2347 }
2348
2349 /*
2350  * hammer2_vop_ioctl { vp, command, data, fflag, cred }
2351  */
2352 static
2353 int
2354 hammer2_vop_ioctl(struct vop_ioctl_args *ap)
2355 {
2356         hammer2_inode_t *ip;
2357         int error;
2358
2359         LOCKSTART;
2360         ip = VTOI(ap->a_vp);
2361
2362         error = hammer2_ioctl(ip, ap->a_command, (void *)ap->a_data,
2363                               ap->a_fflag, ap->a_cred);
2364         LOCKSTOP;
2365         return (error);
2366 }
2367
2368 static
2369 int
2370 hammer2_vop_mountctl(struct vop_mountctl_args *ap)
2371 {
2372         struct mount *mp;
2373         hammer2_pfs_t *pmp;
2374         int rc;
2375
2376         LOCKSTART;
2377         switch (ap->a_op) {
2378         case (MOUNTCTL_SET_EXPORT):
2379                 mp = ap->a_head.a_ops->head.vv_mount;
2380                 pmp = MPTOPMP(mp);
2381
2382                 if (ap->a_ctllen != sizeof(struct export_args))
2383                         rc = (EINVAL);
2384                 else
2385                         rc = vfs_export(mp, &pmp->export,
2386                                         (const struct export_args *)ap->a_ctl);
2387                 break;
2388         default:
2389                 rc = vop_stdmountctl(ap);
2390                 break;
2391         }
2392         LOCKSTOP;
2393         return (rc);
2394 }
2395
2396 /*
2397  * This handles unlinked open files after the vnode is finally dereferenced.
2398  * To avoid deadlocks it cannot be called from the normal vnode recycling
2399  * path, so we call it (1) after a unlink, rmdir, or rename, (2) on every
2400  * flush, and (3) on umount.
2401  */
2402 void
2403 hammer2_run_unlinkq(hammer2_trans_t *trans, hammer2_pfs_t *pmp)
2404 {
2405         const hammer2_inode_data_t *ripdata;
2406         hammer2_inode_unlink_t *ipul;
2407         hammer2_inode_t *ip;
2408         hammer2_cluster_t *cluster;
2409         hammer2_cluster_t *cparent;
2410
2411         if (TAILQ_EMPTY(&pmp->unlinkq))
2412                 return;
2413
2414         LOCKSTART;
2415         hammer2_spin_ex(&pmp->list_spin);
2416         while ((ipul = TAILQ_FIRST(&pmp->unlinkq)) != NULL) {
2417                 TAILQ_REMOVE(&pmp->unlinkq, ipul, entry);
2418                 hammer2_spin_unex(&pmp->list_spin);
2419                 ip = ipul->ip;
2420                 kfree(ipul, pmp->minode);
2421
2422                 cluster = hammer2_inode_lock_ex(ip);
2423                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
2424                 if (hammer2_debug & 0x400) {
2425                         kprintf("hammer2: unlink on reclaim: %s refs=%d\n",
2426                                 ripdata->filename, ip->refs);
2427                 }
2428                 KKASSERT(ripdata->nlinks == 0);
2429
2430                 cparent = hammer2_cluster_parent(cluster);
2431                 hammer2_cluster_delete(trans, cparent, cluster,
2432                                        HAMMER2_DELETE_PERMANENT);
2433                 hammer2_cluster_unlock(cparent);
2434                 hammer2_inode_unlock_ex(ip, cluster);   /* inode lock */
2435                 hammer2_inode_drop(ip);                 /* ipul ref */
2436
2437                 hammer2_spin_ex(&pmp->list_spin);
2438         }
2439         hammer2_spin_unex(&pmp->list_spin);
2440         LOCKSTOP;
2441 }
2442
2443
2444 /*
2445  * KQFILTER
2446  */
2447 static void filt_hammer2detach(struct knote *kn);
2448 static int filt_hammer2read(struct knote *kn, long hint);
2449 static int filt_hammer2write(struct knote *kn, long hint);
2450 static int filt_hammer2vnode(struct knote *kn, long hint);
2451
2452 static struct filterops hammer2read_filtops =
2453         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2454           NULL, filt_hammer2detach, filt_hammer2read };
2455 static struct filterops hammer2write_filtops =
2456         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2457           NULL, filt_hammer2detach, filt_hammer2write };
2458 static struct filterops hammer2vnode_filtops =
2459         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2460           NULL, filt_hammer2detach, filt_hammer2vnode };
2461
2462 static
2463 int
2464 hammer2_vop_kqfilter(struct vop_kqfilter_args *ap)
2465 {
2466         struct vnode *vp = ap->a_vp;
2467         struct knote *kn = ap->a_kn;
2468
2469         switch (kn->kn_filter) {
2470         case EVFILT_READ:
2471                 kn->kn_fop = &hammer2read_filtops;
2472                 break;
2473         case EVFILT_WRITE:
2474                 kn->kn_fop = &hammer2write_filtops;
2475                 break;
2476         case EVFILT_VNODE:
2477                 kn->kn_fop = &hammer2vnode_filtops;
2478                 break;
2479         default:
2480                 return (EOPNOTSUPP);
2481         }
2482
2483         kn->kn_hook = (caddr_t)vp;
2484
2485         knote_insert(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
2486
2487         return(0);
2488 }
2489
2490 static void
2491 filt_hammer2detach(struct knote *kn)
2492 {
2493         struct vnode *vp = (void *)kn->kn_hook;
2494
2495         knote_remove(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
2496 }
2497
2498 static int
2499 filt_hammer2read(struct knote *kn, long hint)
2500 {
2501         struct vnode *vp = (void *)kn->kn_hook;
2502         hammer2_inode_t *ip = VTOI(vp);
2503         off_t off;
2504
2505         if (hint == NOTE_REVOKE) {
2506                 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
2507                 return(1);
2508         }
2509         off = ip->size - kn->kn_fp->f_offset;
2510         kn->kn_data = (off < INTPTR_MAX) ? off : INTPTR_MAX;
2511         if (kn->kn_sfflags & NOTE_OLDAPI)
2512                 return(1);
2513         return (kn->kn_data != 0);
2514 }
2515
2516
2517 static int
2518 filt_hammer2write(struct knote *kn, long hint)
2519 {
2520         if (hint == NOTE_REVOKE)
2521                 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
2522         kn->kn_data = 0;
2523         return (1);
2524 }
2525
2526 static int
2527 filt_hammer2vnode(struct knote *kn, long hint)
2528 {
2529         if (kn->kn_sfflags & hint)
2530                 kn->kn_fflags |= hint;
2531         if (hint == NOTE_REVOKE) {
2532                 kn->kn_flags |= (EV_EOF | EV_NODATA);
2533                 return (1);
2534         }
2535         return (kn->kn_fflags != 0);
2536 }
2537
2538 /*
2539  * FIFO VOPS
2540  */
2541 static
2542 int
2543 hammer2_vop_markatime(struct vop_markatime_args *ap)
2544 {
2545         hammer2_inode_t *ip;
2546         struct vnode *vp;
2547
2548         vp = ap->a_vp;
2549         ip = VTOI(vp);
2550
2551         if (ip->pmp->ronly)
2552                 return(EROFS);
2553         return(0);
2554 }
2555
2556 static
2557 int
2558 hammer2_vop_fifokqfilter(struct vop_kqfilter_args *ap)
2559 {
2560         int error;
2561
2562         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2563         if (error)
2564                 error = hammer2_vop_kqfilter(ap);
2565         return(error);
2566 }
2567
2568 /*
2569  * VOPS vector
2570  */
2571 struct vop_ops hammer2_vnode_vops = {
2572         .vop_default    = vop_defaultop,
2573         .vop_fsync      = hammer2_vop_fsync,
2574         .vop_getpages   = vop_stdgetpages,
2575         .vop_putpages   = vop_stdputpages,
2576         .vop_access     = hammer2_vop_access,
2577         .vop_advlock    = hammer2_vop_advlock,
2578         .vop_close      = hammer2_vop_close,
2579         .vop_nlink      = hammer2_vop_nlink,
2580         .vop_ncreate    = hammer2_vop_ncreate,
2581         .vop_nsymlink   = hammer2_vop_nsymlink,
2582         .vop_nremove    = hammer2_vop_nremove,
2583         .vop_nrmdir     = hammer2_vop_nrmdir,
2584         .vop_nrename    = hammer2_vop_nrename,
2585         .vop_getattr    = hammer2_vop_getattr,
2586         .vop_setattr    = hammer2_vop_setattr,
2587         .vop_readdir    = hammer2_vop_readdir,
2588         .vop_readlink   = hammer2_vop_readlink,
2589         .vop_getpages   = vop_stdgetpages,
2590         .vop_putpages   = vop_stdputpages,
2591         .vop_read       = hammer2_vop_read,
2592         .vop_write      = hammer2_vop_write,
2593         .vop_open       = hammer2_vop_open,
2594         .vop_inactive   = hammer2_vop_inactive,
2595         .vop_reclaim    = hammer2_vop_reclaim,
2596         .vop_nresolve   = hammer2_vop_nresolve,
2597         .vop_nlookupdotdot = hammer2_vop_nlookupdotdot,
2598         .vop_nmkdir     = hammer2_vop_nmkdir,
2599         .vop_nmknod     = hammer2_vop_nmknod,
2600         .vop_ioctl      = hammer2_vop_ioctl,
2601         .vop_mountctl   = hammer2_vop_mountctl,
2602         .vop_bmap       = hammer2_vop_bmap,
2603         .vop_strategy   = hammer2_vop_strategy,
2604         .vop_kqfilter   = hammer2_vop_kqfilter
2605 };
2606
2607 struct vop_ops hammer2_spec_vops = {
2608         .vop_default =          vop_defaultop,
2609         .vop_fsync =            hammer2_vop_fsync,
2610         .vop_read =             vop_stdnoread,
2611         .vop_write =            vop_stdnowrite,
2612         .vop_access =           hammer2_vop_access,
2613         .vop_close =            hammer2_vop_close,
2614         .vop_markatime =        hammer2_vop_markatime,
2615         .vop_getattr =          hammer2_vop_getattr,
2616         .vop_inactive =         hammer2_vop_inactive,
2617         .vop_reclaim =          hammer2_vop_reclaim,
2618         .vop_setattr =          hammer2_vop_setattr
2619 };
2620
2621 struct vop_ops hammer2_fifo_vops = {
2622         .vop_default =          fifo_vnoperate,
2623         .vop_fsync =            hammer2_vop_fsync,
2624 #if 0
2625         .vop_read =             hammer2_vop_fiforead,
2626         .vop_write =            hammer2_vop_fifowrite,
2627 #endif
2628         .vop_access =           hammer2_vop_access,
2629 #if 0
2630         .vop_close =            hammer2_vop_fifoclose,
2631 #endif
2632         .vop_markatime =        hammer2_vop_markatime,
2633         .vop_getattr =          hammer2_vop_getattr,
2634         .vop_inactive =         hammer2_vop_inactive,
2635         .vop_reclaim =          hammer2_vop_reclaim,
2636         .vop_setattr =          hammer2_vop_setattr,
2637         .vop_kqfilter =         hammer2_vop_fifokqfilter
2638 };
2639