sys/vfs/hammer/hammer_vnops.c

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/vfs/hammer/hammer_vnops.c,v 1.36 2008/03/19 20:18:17 dillon Exp $
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/namecache.h>
  42 #include <sys/vnode.h>
  43 #include <sys/lockf.h>
  44 #include <sys/event.h>
  45 #include <sys/stat.h>
  46 #include <sys/dirent.h>
  47 #include <vm/vm_extern.h>
  48 #include <vfs/fifofs/fifo.h>
  49 #include "hammer.h"
  50
  51 /*
  52  * USERFS VNOPS
  53  */
  54 /*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
  55 static int hammer_vop_fsync(struct vop_fsync_args *);
  56 static int hammer_vop_read(struct vop_read_args *);
  57 static int hammer_vop_write(struct vop_write_args *);
  58 static int hammer_vop_access(struct vop_access_args *);
  59 static int hammer_vop_advlock(struct vop_advlock_args *);
  60 static int hammer_vop_close(struct vop_close_args *);
  61 static int hammer_vop_ncreate(struct vop_ncreate_args *);
  62 static int hammer_vop_getattr(struct vop_getattr_args *);
  63 static int hammer_vop_nresolve(struct vop_nresolve_args *);
  64 static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
  65 static int hammer_vop_nlink(struct vop_nlink_args *);
  66 static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
  67 static int hammer_vop_nmknod(struct vop_nmknod_args *);
  68 static int hammer_vop_open(struct vop_open_args *);
  69 static int hammer_vop_pathconf(struct vop_pathconf_args *);
  70 static int hammer_vop_print(struct vop_print_args *);
  71 static int hammer_vop_readdir(struct vop_readdir_args *);
  72 static int hammer_vop_readlink(struct vop_readlink_args *);
  73 static int hammer_vop_nremove(struct vop_nremove_args *);
  74 static int hammer_vop_nrename(struct vop_nrename_args *);
  75 static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
  76 static int hammer_vop_setattr(struct vop_setattr_args *);
  77 static int hammer_vop_strategy(struct vop_strategy_args *);
  78 static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
  79 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
  80 static int hammer_vop_ioctl(struct vop_ioctl_args *);
  81 static int hammer_vop_mountctl(struct vop_mountctl_args *);
  82
  83 static int hammer_vop_fifoclose (struct vop_close_args *);
  84 static int hammer_vop_fiforead (struct vop_read_args *);
  85 static int hammer_vop_fifowrite (struct vop_write_args *);
  86
  87 static int hammer_vop_specclose (struct vop_close_args *);
  88 static int hammer_vop_specread (struct vop_read_args *);
  89 static int hammer_vop_specwrite (struct vop_write_args *);
  90
  91 struct vop_ops hammer_vnode_vops = {
  92         .vop_default =          vop_defaultop,
  93         .vop_fsync =            hammer_vop_fsync,
  94         .vop_getpages =         vop_stdgetpages,
  95         .vop_putpages =         vop_stdputpages,
  96         .vop_read =             hammer_vop_read,
  97         .vop_write =            hammer_vop_write,
  98         .vop_access =           hammer_vop_access,
  99         .vop_advlock =          hammer_vop_advlock,
 100         .vop_close =            hammer_vop_close,
 101         .vop_ncreate =          hammer_vop_ncreate,
 102         .vop_getattr =          hammer_vop_getattr,
 103         .vop_inactive =         hammer_vop_inactive,
 104         .vop_reclaim =          hammer_vop_reclaim,
 105         .vop_nresolve =         hammer_vop_nresolve,
 106         .vop_nlookupdotdot =    hammer_vop_nlookupdotdot,
 107         .vop_nlink =            hammer_vop_nlink,
 108         .vop_nmkdir =           hammer_vop_nmkdir,
 109         .vop_nmknod =           hammer_vop_nmknod,
 110         .vop_open =             hammer_vop_open,
 111         .vop_pathconf =         hammer_vop_pathconf,
 112         .vop_print =            hammer_vop_print,
 113         .vop_readdir =          hammer_vop_readdir,
 114         .vop_readlink =         hammer_vop_readlink,
 115         .vop_nremove =          hammer_vop_nremove,
 116         .vop_nrename =          hammer_vop_nrename,
 117         .vop_nrmdir =           hammer_vop_nrmdir,
 118         .vop_setattr =          hammer_vop_setattr,
 119         .vop_strategy =         hammer_vop_strategy,
 120         .vop_nsymlink =         hammer_vop_nsymlink,
 121         .vop_nwhiteout =        hammer_vop_nwhiteout,
 122         .vop_ioctl =            hammer_vop_ioctl,
 123         .vop_mountctl =         hammer_vop_mountctl
 124 };
 125
 126 struct vop_ops hammer_spec_vops = {
 127         .vop_default =          spec_vnoperate,
 128         .vop_fsync =            hammer_vop_fsync,
 129         .vop_read =             hammer_vop_specread,
 130         .vop_write =            hammer_vop_specwrite,
 131         .vop_access =           hammer_vop_access,
 132         .vop_close =            hammer_vop_specclose,
 133         .vop_getattr =          hammer_vop_getattr,
 134         .vop_inactive =         hammer_vop_inactive,
 135         .vop_reclaim =          hammer_vop_reclaim,
 136         .vop_setattr =          hammer_vop_setattr
 137 };
 138
 139 struct vop_ops hammer_fifo_vops = {
 140         .vop_default =          fifo_vnoperate,
 141         .vop_fsync =            hammer_vop_fsync,
 142         .vop_read =             hammer_vop_fiforead,
 143         .vop_write =            hammer_vop_fifowrite,
 144         .vop_access =           hammer_vop_access,
 145         .vop_close =            hammer_vop_fifoclose,
 146         .vop_getattr =          hammer_vop_getattr,
 147         .vop_inactive =         hammer_vop_inactive,
 148         .vop_reclaim =          hammer_vop_reclaim,
 149         .vop_setattr =          hammer_vop_setattr
 150 };
 151
 152 static int hammer_dounlink(struct nchandle *nch, struct vnode *dvp,
 153                            struct ucred *cred, int flags);
 154 static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
 155 static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
 156
 157 #if 0
 158 static
 159 int
 160 hammer_vop_vnoperate(struct vop_generic_args *)
 161 {
 162         return (VOCALL(&hammer_vnode_vops, ap));
 163 }
 164 #endif
 165
 166 /*
 167  * hammer_vop_fsync { vp, waitfor }
 168  */
 169 static
 170 int
 171 hammer_vop_fsync(struct vop_fsync_args *ap)
 172 {
 173         hammer_inode_t ip;
 174         int error;
 175
 176         ip = VTOI(ap->a_vp);
 177         error = hammer_sync_inode(ip, ap->a_waitfor, 0);
 178         return (error);
 179 }
 180
 181 /*
 182  * hammer_vop_read { vp, uio, ioflag, cred }
 183  */
 184 static
 185 int
 186 hammer_vop_read(struct vop_read_args *ap)
 187 {
 188         struct hammer_transaction trans;
 189         hammer_inode_t ip;
 190         off_t offset;
 191         struct buf *bp;
 192         struct uio *uio;
 193         int error;
 194         int n;
 195         int seqcount;
 196
 197         if (ap->a_vp->v_type != VREG)
 198                 return (EINVAL);
 199         ip = VTOI(ap->a_vp);
 200         error = 0;
 201         seqcount = ap->a_ioflag >> 16;
 202
 203         hammer_start_transaction(&trans, ip->hmp);
 204
 205         /*
 206          * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
 207          */
 208         uio = ap->a_uio;
 209         while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_rec.ino_size) {
 210                 offset = uio->uio_offset & HAMMER_BUFMASK;
 211 #if 0
 212                 error = cluster_read(ap->a_vp, ip->ino_rec.ino_size,
 213                                      uio->uio_offset - offset, HAMMER_BUFSIZE,
 214                                      MAXBSIZE, seqcount, &bp);
 215 #endif
 216                 error = bread(ap->a_vp, uio->uio_offset - offset,
 217                               HAMMER_BUFSIZE, &bp);
 218                 if (error) {
 219                         brelse(bp);
 220                         break;
 221                 }
 222                 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
 223                 n = HAMMER_BUFSIZE - offset;
 224                 if (n > uio->uio_resid)
 225                         n = uio->uio_resid;
 226                 if (n > ip->ino_rec.ino_size - uio->uio_offset)
 227                         n = (int)(ip->ino_rec.ino_size - uio->uio_offset);
 228                 error = uiomove((char *)bp->b_data + offset, n, uio);
 229                 if (error) {
 230                         bqrelse(bp);
 231                         break;
 232                 }
 233                 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
 234                     (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
 235                         ip->ino_rec.ino_atime = trans.tid;
 236                         hammer_modify_inode(&trans, ip, HAMMER_INODE_ITIMES);
 237                 }
 238                 bqrelse(bp);
 239         }
 240         hammer_commit_transaction(&trans);
 241         return (error);
 242 }
 243
 244 /*
 245  * hammer_vop_write { vp, uio, ioflag, cred }
 246  */
 247 static
 248 int
 249 hammer_vop_write(struct vop_write_args *ap)
 250 {
 251         struct hammer_transaction trans;
 252         struct hammer_inode *ip;
 253         struct uio *uio;
 254         off_t offset;
 255         struct buf *bp;
 256         int error;
 257         int n;
 258         int flags;
 259
 260         if (ap->a_vp->v_type != VREG)
 261                 return (EINVAL);
 262         ip = VTOI(ap->a_vp);
 263         error = 0;
 264
 265         if (ip->flags & HAMMER_INODE_RO)
 266                 return (EROFS);
 267
 268         /*
 269          * Create a transaction to cover the operations we perform.
 270          */
 271         hammer_start_transaction(&trans, ip->hmp);
 272         uio = ap->a_uio;
 273
 274         /*
 275          * Check append mode
 276          */
 277         if (ap->a_ioflag & IO_APPEND)
 278                 uio->uio_offset = ip->ino_rec.ino_size;
 279
 280         /*
 281          * Check for illegal write offsets.  Valid range is 0...2^63-1
 282          */
 283         if (uio->uio_offset < 0 || uio->uio_offset + uio->uio_resid <= 0) {
 284                 hammer_commit_transaction(&trans);
 285                 return (EFBIG);
 286         }
 287
 288         /*
 289          * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
 290          */
 291         while (uio->uio_resid > 0) {
 292                 int fixsize = 0;
 293
 294                 offset = uio->uio_offset & HAMMER_BUFMASK;
 295                 n = HAMMER_BUFSIZE - offset;
 296                 if (n > uio->uio_resid)
 297                         n = uio->uio_resid;
 298                 if (uio->uio_offset + n > ip->ino_rec.ino_size) {
 299                         vnode_pager_setsize(ap->a_vp, uio->uio_offset + n);
 300                         fixsize = 1;
 301                 }
 302
 303                 if (uio->uio_segflg == UIO_NOCOPY) {
 304                         /*
 305                          * Issuing a write with the same data backing the
 306                          * buffer.  Instantiate the buffer to collect the
 307                          * backing vm pages, then read-in any missing bits.
 308                          *
 309                          * This case is used by vop_stdputpages().
 310                          */
 311                         bp = getblk(ap->a_vp, uio->uio_offset - offset,
 312                                     HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
 313                         if ((bp->b_flags & B_CACHE) == 0) {
 314                                 bqrelse(bp);
 315                                 error = bread(ap->a_vp,
 316                                               uio->uio_offset - offset,
 317                                               HAMMER_BUFSIZE, &bp);
 318                         }
 319                 } else if (offset == 0 && uio->uio_resid >= HAMMER_BUFSIZE) {
 320                         /*
 321                          * entirely overwrite the buffer
 322                          */
 323                         bp = getblk(ap->a_vp, uio->uio_offset - offset,
 324                                     HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
 325                 } else if (offset == 0 && uio->uio_offset >= ip->ino_rec.ino_size) {
 326                         /*
 327                          * XXX
 328                          */
 329                         bp = getblk(ap->a_vp, uio->uio_offset - offset,
 330                                     HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
 331                         vfs_bio_clrbuf(bp);
 332                 } else {
 333                         /*
 334                          * Partial overwrite, read in any missing bits then
 335                          * replace the portion being written.
 336                          */
 337                         error = bread(ap->a_vp, uio->uio_offset - offset,
 338                                       HAMMER_BUFSIZE, &bp);
 339                         if (error == 0)
 340                                 bheavy(bp);
 341                 }
 342                 if (error == 0)
 343                         error = uiomove((char *)bp->b_data + offset, n, uio);
 344
 345                 /*
 346                  * If we screwed up we have to undo any VM size changes we
 347                  * made.
 348                  */
 349                 if (error) {
 350                         brelse(bp);
 351                         if (fixsize) {
 352                                 vtruncbuf(ap->a_vp, ip->ino_rec.ino_size,
 353                                           HAMMER_BUFSIZE);
 354                         }
 355                         break;
 356                 }
 357                 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
 358                 if (ip->ino_rec.ino_size < uio->uio_offset) {
 359                         ip->ino_rec.ino_size = uio->uio_offset;
 360                         flags = HAMMER_INODE_RDIRTY;
 361                         vnode_pager_setsize(ap->a_vp, ip->ino_rec.ino_size);
 362                 } else {
 363                         flags = 0;
 364                 }
 365                 ip->ino_rec.ino_mtime = trans.tid;
 366                 flags |= HAMMER_INODE_ITIMES | HAMMER_INODE_BUFS;
 367                 hammer_modify_inode(&trans, ip, flags);
 368
 369 #if 0
 370                 /*
 371                  * The file write must be tagged with the same TID as the
 372                  * inode, for consistency in case the inode changed size.
 373                  * This guarantees the on-disk data records will have a
 374                  * TID <= the inode TID representing the size change.
 375                  *
 376                  * If a prior write has not yet flushed, retain its TID.
 377                  */
 378                 if (bp->b_tid == 0)
 379                         bp->b_tid = ip->last_tid;
 380 #endif
 381                 /*
 382                  * For now we can't use ip->last_tid because we may wind
 383                  * up trying to flush the same buffer with the same TID
 384                  * (but different data) multiple times, which will cause
 385                  * a panic.
 386                  */
 387                 if (bp->b_tid == 0)
 388                         bp->b_tid = trans.tid;
 389
 390                 if (ap->a_ioflag & IO_SYNC) {
 391                         bwrite(bp);
 392                 } else if (ap->a_ioflag & IO_DIRECT) {
 393                         bawrite(bp);
 394                 } else if ((ap->a_ioflag >> 16) > 1 &&
 395                            (uio->uio_offset & HAMMER_BUFMASK) == 0) {
 396                         /*
 397                          * If seqcount indicates sequential operation and
 398                          * we just finished filling a buffer, push it out
 399                          * now to prevent the buffer cache from becoming
 400                          * too full, which would trigger non-optimal
 401                          * flushes.
 402                          */
 403                         bawrite(bp);
 404                 } else {
 405                         bdwrite(bp);
 406                 }
 407         }
 408         if (error)
 409                 hammer_abort_transaction(&trans);
 410         else
 411                 hammer_commit_transaction(&trans);
 412         return (error);
 413 }
 414
 415 /*
 416  * hammer_vop_access { vp, mode, cred }
 417  */
 418 static
 419 int
 420 hammer_vop_access(struct vop_access_args *ap)
 421 {
 422         struct hammer_inode *ip = VTOI(ap->a_vp);
 423         uid_t uid;
 424         gid_t gid;
 425         int error;
 426
 427         uid = hammer_to_unix_xid(&ip->ino_data.uid);
 428         gid = hammer_to_unix_xid(&ip->ino_data.gid);
 429
 430         error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
 431                                   ip->ino_data.uflags);
 432         return (error);
 433 }
 434
 435 /*
 436  * hammer_vop_advlock { vp, id, op, fl, flags }
 437  */
 438 static
 439 int
 440 hammer_vop_advlock(struct vop_advlock_args *ap)
 441 {
 442         struct hammer_inode *ip = VTOI(ap->a_vp);
 443
 444         return (lf_advlock(ap, &ip->advlock, ip->ino_rec.ino_size));
 445 }
 446
 447 /*
 448  * hammer_vop_close { vp, fflag }
 449  */
 450 static
 451 int
 452 hammer_vop_close(struct vop_close_args *ap)
 453 {
 454         return (vop_stdclose(ap));
 455 }
 456
 457 /*
 458  * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
 459  *
 460  * The operating system has already ensured that the directory entry
 461  * does not exist and done all appropriate namespace locking.
 462  */
 463 static
 464 int
 465 hammer_vop_ncreate(struct vop_ncreate_args *ap)
 466 {
 467         struct hammer_transaction trans;
 468         struct hammer_inode *dip;
 469         struct hammer_inode *nip;
 470         struct nchandle *nch;
 471         int error;
 472
 473         nch = ap->a_nch;
 474         dip = VTOI(ap->a_dvp);
 475
 476         if (dip->flags & HAMMER_INODE_RO)
 477                 return (EROFS);
 478
 479         /*
 480          * Create a transaction to cover the operations we perform.
 481          */
 482         hammer_start_transaction(&trans, dip->hmp);
 483
 484         /*
 485          * Create a new filesystem object of the requested type.  The
 486          * returned inode will be referenced but not locked.
 487          */
 488
 489         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 490         if (error)
 491                 kprintf("hammer_create_inode error %d\n", error);
 492         if (error) {
 493                 hammer_abort_transaction(&trans);
 494                 *ap->a_vpp = NULL;
 495                 return (error);
 496         }
 497
 498         /*
 499          * Add the new filesystem object to the directory.  This will also
 500          * bump the inode's link count.
 501          */
 502         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 503         if (error)
 504                 kprintf("hammer_ip_add_directory error %d\n", error);
 505
 506         /*
 507          * Finish up.
 508          */
 509         if (error) {
 510                 hammer_rel_inode(nip, 0);
 511                 hammer_abort_transaction(&trans);
 512                 *ap->a_vpp = NULL;
 513         } else {
 514                 hammer_commit_transaction(&trans);
 515                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 516                 hammer_rel_inode(nip, 0);
 517                 if (error == 0) {
 518                         cache_setunresolved(ap->a_nch);
 519                         cache_setvp(ap->a_nch, *ap->a_vpp);
 520                 }
 521         }
 522         return (error);
 523 }
 524
 525 /*
 526  * hammer_vop_getattr { vp, vap }
 527  */
 528 static
 529 int
 530 hammer_vop_getattr(struct vop_getattr_args *ap)
 531 {
 532         struct hammer_inode *ip = VTOI(ap->a_vp);
 533         struct vattr *vap = ap->a_vap;
 534
 535 #if 0
 536         if (cache_check_fsmid_vp(ap->a_vp, &ip->fsmid) &&
 537             (vp->v_mount->mnt_flag & MNT_RDONLY) == 0 &&
 538             ip->obj_asof == XXX
 539         ) {
 540                 /* LAZYMOD XXX */
 541         }
 542         hammer_itimes(ap->a_vp);
 543 #endif
 544
 545         vap->va_fsid = ip->hmp->fsid_udev;
 546         vap->va_fileid = ip->ino_rec.base.base.obj_id;
 547         vap->va_mode = ip->ino_data.mode;
 548         vap->va_nlink = ip->ino_rec.ino_nlinks;
 549         vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
 550         vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
 551         vap->va_rmajor = 0;
 552         vap->va_rminor = 0;
 553         vap->va_size = ip->ino_rec.ino_size;
 554         hammer_to_timespec(ip->ino_rec.ino_atime, &vap->va_atime);
 555         hammer_to_timespec(ip->ino_rec.ino_mtime, &vap->va_mtime);
 556         hammer_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
 557         vap->va_flags = ip->ino_data.uflags;
 558         vap->va_gen = 1;        /* hammer inums are unique for all time */
 559         vap->va_blocksize = HAMMER_BUFSIZE;
 560         vap->va_bytes = (ip->ino_rec.ino_size + 63) & ~63;
 561         vap->va_type = hammer_get_vnode_type(ip->ino_rec.base.base.obj_type);
 562         vap->va_filerev = 0;    /* XXX */
 563         /* mtime uniquely identifies any adjustments made to the file */
 564         vap->va_fsmid = ip->ino_rec.ino_mtime;
 565         vap->va_uid_uuid = ip->ino_data.uid;
 566         vap->va_gid_uuid = ip->ino_data.gid;
 567         vap->va_fsid_uuid = ip->hmp->fsid;
 568         vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
 569                           VA_FSID_UUID_VALID;
 570
 571         switch (ip->ino_rec.base.base.obj_type) {
 572         case HAMMER_OBJTYPE_CDEV:
 573         case HAMMER_OBJTYPE_BDEV:
 574                 vap->va_rmajor = ip->ino_data.rmajor;
 575                 vap->va_rminor = ip->ino_data.rminor;
 576                 break;
 577         default:
 578                 break;
 579         }
 580
 581         return(0);
 582 }
 583
 584 /*
 585  * hammer_vop_nresolve { nch, dvp, cred }
 586  *
 587  * Locate the requested directory entry.
 588  */
 589 static
 590 int
 591 hammer_vop_nresolve(struct vop_nresolve_args *ap)
 592 {
 593         struct hammer_transaction trans;
 594         struct namecache *ncp;
 595         hammer_inode_t dip;
 596         hammer_inode_t ip;
 597         hammer_tid_t asof;
 598         struct hammer_cursor cursor;
 599         union hammer_record_ondisk *rec;
 600         struct vnode *vp;
 601         int64_t namekey;
 602         int error;
 603         int i;
 604         int nlen;
 605         int flags;
 606         u_int64_t obj_id;
 607
 608         /*
 609          * Misc initialization, plus handle as-of name extensions.  Look for
 610          * the '@@' extension.  Note that as-of files and directories cannot
 611          * be modified.
 612          */
 613         dip = VTOI(ap->a_dvp);
 614         ncp = ap->a_nch->ncp;
 615         asof = dip->obj_asof;
 616         nlen = ncp->nc_nlen;
 617         flags = dip->flags;
 618
 619         hammer_simple_transaction(&trans, dip->hmp);
 620
 621         for (i = 0; i < nlen; ++i) {
 622                 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
 623                         asof = hammer_str_to_tid(ncp->nc_name + i + 2);
 624                         flags |= HAMMER_INODE_RO;
 625                         break;
 626                 }
 627         }
 628         nlen = i;
 629
 630         /*
 631          * If there is no path component the time extension is relative to
 632          * dip.
 633          */
 634         if (nlen == 0) {
 635                 ip = hammer_get_inode(&trans, &dip->cache[1], dip->obj_id,
 636                                       asof, flags, &error);
 637                 if (error == 0) {
 638                         error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
 639                         hammer_rel_inode(ip, 0);
 640                 } else {
 641                         vp = NULL;
 642                 }
 643                 if (error == 0) {
 644                         vn_unlock(vp);
 645                         cache_setvp(ap->a_nch, vp);
 646                         vrele(vp);
 647                 }
 648                 goto done;
 649         }
 650
 651         /*
 652          * Calculate the namekey and setup the key range for the scan.  This
 653          * works kinda like a chained hash table where the lower 32 bits
 654          * of the namekey synthesize the chain.
 655          *
 656          * The key range is inclusive of both key_beg and key_end.
 657          */
 658         namekey = hammer_directory_namekey(ncp->nc_name, nlen);
 659
 660         error = hammer_init_cursor(&trans, &cursor, &dip->cache[0]);
 661         cursor.key_beg.obj_id = dip->obj_id;
 662         cursor.key_beg.key = namekey;
 663         cursor.key_beg.create_tid = 0;
 664         cursor.key_beg.delete_tid = 0;
 665         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
 666         cursor.key_beg.obj_type = 0;
 667
 668         cursor.key_end = cursor.key_beg;
 669         cursor.key_end.key |= 0xFFFFFFFFULL;
 670         cursor.asof = asof;
 671         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
 672
 673         /*
 674          * Scan all matching records (the chain), locate the one matching
 675          * the requested path component.
 676          *
 677          * The hammer_ip_*() functions merge in-memory records with on-disk
 678          * records for the purposes of the search.
 679          */
 680         if (error == 0)
 681                 error = hammer_ip_first(&cursor, dip);
 682
 683         rec = NULL;
 684         obj_id = 0;
 685
 686         while (error == 0) {
 687                 error = hammer_ip_resolve_data(&cursor);
 688                 if (error)
 689                         break;
 690                 rec = cursor.record;
 691                 if (nlen == rec->entry.base.data_len &&
 692                     bcmp(ncp->nc_name, cursor.data, nlen) == 0) {
 693                         obj_id = rec->entry.obj_id;
 694                         break;
 695                 }
 696                 error = hammer_ip_next(&cursor);
 697         }
 698         hammer_done_cursor(&cursor);
 699         if (error == 0) {
 700                 ip = hammer_get_inode(&trans, &dip->cache[1],
 701                                       obj_id, asof, flags, &error);
 702                 if (error == 0) {
 703                         error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
 704                         hammer_rel_inode(ip, 0);
 705                 } else {
 706                         vp = NULL;
 707                 }
 708                 if (error == 0) {
 709                         vn_unlock(vp);
 710                         cache_setvp(ap->a_nch, vp);
 711                         vrele(vp);
 712                 }
 713         } else if (error == ENOENT) {
 714                 cache_setvp(ap->a_nch, NULL);
 715         }
 716 done:
 717         hammer_commit_transaction(&trans);
 718         return (error);
 719 }
 720
 721 /*
 722  * hammer_vop_nlookupdotdot { dvp, vpp, cred }
 723  *
 724  * Locate the parent directory of a directory vnode.
 725  *
 726  * dvp is referenced but not locked.  *vpp must be returned referenced and
 727  * locked.  A parent_obj_id of 0 does not necessarily indicate that we are
 728  * at the root, instead it could indicate that the directory we were in was
 729  * removed.
 730  *
 731  * NOTE: as-of sequences are not linked into the directory structure.  If
 732  * we are at the root with a different asof then the mount point, reload
 733  * the same directory with the mount point's asof.   I'm not sure what this
 734  * will do to NFS.  We encode ASOF stamps in NFS file handles so it might not
 735  * get confused, but it hasn't been tested.
 736  */
 737 static
 738 int
 739 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
 740 {
 741         struct hammer_transaction trans;
 742         struct hammer_inode *dip;
 743         struct hammer_inode *ip;
 744         int64_t parent_obj_id;
 745         hammer_tid_t asof;
 746         int error;
 747
 748         dip = VTOI(ap->a_dvp);
 749         asof = dip->obj_asof;
 750         parent_obj_id = dip->ino_data.parent_obj_id;
 751
 752         if (parent_obj_id == 0) {
 753                 if (dip->obj_id == HAMMER_OBJID_ROOT &&
 754                    asof != dip->hmp->asof) {
 755                         parent_obj_id = dip->obj_id;
 756                         asof = dip->hmp->asof;
 757                         *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
 758                         ksnprintf(*ap->a_fakename, 19, "0x%016llx",
 759                                    dip->obj_asof);
 760                 } else {
 761                         *ap->a_vpp = NULL;
 762                         return ENOENT;
 763                 }
 764         }
 765
 766         hammer_simple_transaction(&trans, dip->hmp);
 767
 768         ip = hammer_get_inode(&trans, &dip->cache[1], parent_obj_id,
 769                               asof, dip->flags, &error);
 770         if (ip) {
 771                 error = hammer_get_vnode(ip, LK_EXCLUSIVE, ap->a_vpp);
 772                 hammer_rel_inode(ip, 0);
 773         } else {
 774                 *ap->a_vpp = NULL;
 775         }
 776         hammer_commit_transaction(&trans);
 777         return (error);
 778 }
 779
 780 /*
 781  * hammer_vop_nlink { nch, dvp, vp, cred }
 782  */
 783 static
 784 int
 785 hammer_vop_nlink(struct vop_nlink_args *ap)
 786 {
 787         struct hammer_transaction trans;
 788         struct hammer_inode *dip;
 789         struct hammer_inode *ip;
 790         struct nchandle *nch;
 791         int error;
 792
 793         nch = ap->a_nch;
 794         dip = VTOI(ap->a_dvp);
 795         ip = VTOI(ap->a_vp);
 796
 797         if (dip->flags & HAMMER_INODE_RO)
 798                 return (EROFS);
 799         if (ip->flags & HAMMER_INODE_RO)
 800                 return (EROFS);
 801
 802         /*
 803          * Create a transaction to cover the operations we perform.
 804          */
 805         hammer_start_transaction(&trans, dip->hmp);
 806
 807         /*
 808          * Add the filesystem object to the directory.  Note that neither
 809          * dip nor ip are referenced or locked, but their vnodes are
 810          * referenced.  This function will bump the inode's link count.
 811          */
 812         error = hammer_ip_add_directory(&trans, dip, nch->ncp, ip);
 813
 814         /*
 815          * Finish up.
 816          */
 817         if (error) {
 818                 hammer_abort_transaction(&trans);
 819         } else {
 820                 cache_setunresolved(nch);
 821                 cache_setvp(nch, ap->a_vp);
 822                 hammer_commit_transaction(&trans);
 823         }
 824         return (error);
 825 }
 826
 827 /*
 828  * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
 829  *
 830  * The operating system has already ensured that the directory entry
 831  * does not exist and done all appropriate namespace locking.
 832  */
 833 static
 834 int
 835 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
 836 {
 837         struct hammer_transaction trans;
 838         struct hammer_inode *dip;
 839         struct hammer_inode *nip;
 840         struct nchandle *nch;
 841         int error;
 842
 843         nch = ap->a_nch;
 844         dip = VTOI(ap->a_dvp);
 845
 846         if (dip->flags & HAMMER_INODE_RO)
 847                 return (EROFS);
 848
 849         /*
 850          * Create a transaction to cover the operations we perform.
 851          */
 852         hammer_start_transaction(&trans, dip->hmp);
 853
 854         /*
 855          * Create a new filesystem object of the requested type.  The
 856          * returned inode will be referenced but not locked.
 857          */
 858         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 859         if (error)
 860                 kprintf("hammer_mkdir error %d\n", error);
 861         if (error) {
 862                 hammer_abort_transaction(&trans);
 863                 *ap->a_vpp = NULL;
 864                 return (error);
 865         }
 866
 867         /*
 868          * Add the new filesystem object to the directory.  This will also
 869          * bump the inode's link count.
 870          */
 871         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 872         if (error)
 873                 kprintf("hammer_mkdir (add) error %d\n", error);
 874
 875         /*
 876          * Finish up.
 877          */
 878         if (error) {
 879                 hammer_rel_inode(nip, 0);
 880                 hammer_abort_transaction(&trans);
 881                 *ap->a_vpp = NULL;
 882         } else {
 883                 hammer_commit_transaction(&trans);
 884                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 885                 hammer_rel_inode(nip, 0);
 886                 if (error == 0) {
 887                         cache_setunresolved(ap->a_nch);
 888                         cache_setvp(ap->a_nch, *ap->a_vpp);
 889                 }
 890         }
 891         return (error);
 892 }
 893
 894 /*
 895  * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
 896  *
 897  * The operating system has already ensured that the directory entry
 898  * does not exist and done all appropriate namespace locking.
 899  */
 900 static
 901 int
 902 hammer_vop_nmknod(struct vop_nmknod_args *ap)
 903 {
 904         struct hammer_transaction trans;
 905         struct hammer_inode *dip;
 906         struct hammer_inode *nip;
 907         struct nchandle *nch;
 908         int error;
 909
 910         nch = ap->a_nch;
 911         dip = VTOI(ap->a_dvp);
 912
 913         if (dip->flags & HAMMER_INODE_RO)
 914                 return (EROFS);
 915
 916         /*
 917          * Create a transaction to cover the operations we perform.
 918          */
 919         hammer_start_transaction(&trans, dip->hmp);
 920
 921         /*
 922          * Create a new filesystem object of the requested type.  The
 923          * returned inode will be referenced but not locked.
 924          */
 925         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 926         if (error) {
 927                 hammer_abort_transaction(&trans);
 928                 *ap->a_vpp = NULL;
 929                 return (error);
 930         }
 931
 932         /*
 933          * Add the new filesystem object to the directory.  This will also
 934          * bump the inode's link count.
 935          */
 936         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 937
 938         /*
 939          * Finish up.
 940          */
 941         if (error) {
 942                 hammer_rel_inode(nip, 0);
 943                 hammer_abort_transaction(&trans);
 944                 *ap->a_vpp = NULL;
 945         } else {
 946                 hammer_commit_transaction(&trans);
 947                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 948                 hammer_rel_inode(nip, 0);
 949                 if (error == 0) {
 950                         cache_setunresolved(ap->a_nch);
 951                         cache_setvp(ap->a_nch, *ap->a_vpp);
 952                 }
 953         }
 954         return (error);
 955 }
 956
 957 /*
 958  * hammer_vop_open { vp, mode, cred, fp }
 959  */
 960 static
 961 int
 962 hammer_vop_open(struct vop_open_args *ap)
 963 {
 964         if ((ap->a_mode & FWRITE) && (VTOI(ap->a_vp)->flags & HAMMER_INODE_RO))
 965                 return (EROFS);
 966
 967         return(vop_stdopen(ap));
 968 }
 969
 970 /*
 971  * hammer_vop_pathconf { vp, name, retval }
 972  */
 973 static
 974 int
 975 hammer_vop_pathconf(struct vop_pathconf_args *ap)
 976 {
 977         return EOPNOTSUPP;
 978 }
 979
 980 /*
 981  * hammer_vop_print { vp }
 982  */
 983 static
 984 int
 985 hammer_vop_print(struct vop_print_args *ap)
 986 {
 987         return EOPNOTSUPP;
 988 }
 989
 990 /*
 991  * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
 992  */
 993 static
 994 int
 995 hammer_vop_readdir(struct vop_readdir_args *ap)
 996 {
 997         struct hammer_transaction trans;
 998         struct hammer_cursor cursor;
 999         struct hammer_inode *ip;
1000         struct uio *uio;
1001         hammer_record_ondisk_t rec;
1002         hammer_base_elm_t base;
1003         int error;
1004         int cookie_index;
1005         int ncookies;
1006         off_t *cookies;
1007         off_t saveoff;
1008         int r;
1009
1010         ip = VTOI(ap->a_vp);
1011         uio = ap->a_uio;
1012         saveoff = uio->uio_offset;
1013
1014         if (ap->a_ncookies) {
1015                 ncookies = uio->uio_resid / 16 + 1;
1016                 if (ncookies > 1024)
1017                         ncookies = 1024;
1018                 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1019                 cookie_index = 0;
1020         } else {
1021                 ncookies = -1;
1022                 cookies = NULL;
1023                 cookie_index = 0;
1024         }
1025
1026         hammer_simple_transaction(&trans, ip->hmp);
1027
1028         /*
1029          * Handle artificial entries
1030          */
1031         error = 0;
1032         if (saveoff == 0) {
1033                 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1034                 if (r)
1035                         goto done;
1036                 if (cookies)
1037                         cookies[cookie_index] = saveoff;
1038                 ++saveoff;
1039                 ++cookie_index;
1040                 if (cookie_index == ncookies)
1041                         goto done;
1042         }
1043         if (saveoff == 1) {
1044                 if (ip->ino_data.parent_obj_id) {
1045                         r = vop_write_dirent(&error, uio,
1046                                              ip->ino_data.parent_obj_id,
1047                                              DT_DIR, 2, "..");
1048                 } else {
1049                         r = vop_write_dirent(&error, uio,
1050                                              ip->obj_id, DT_DIR, 2, "..");
1051                 }
1052                 if (r)
1053                         goto done;
1054                 if (cookies)
1055                         cookies[cookie_index] = saveoff;
1056                 ++saveoff;
1057                 ++cookie_index;
1058                 if (cookie_index == ncookies)
1059                         goto done;
1060         }
1061
1062         /*
1063          * Key range (begin and end inclusive) to scan.  Directory keys
1064          * directly translate to a 64 bit 'seek' position.
1065          */
1066         hammer_init_cursor(&trans, &cursor, &ip->cache[0]);
1067         cursor.key_beg.obj_id = ip->obj_id;
1068         cursor.key_beg.create_tid = 0;
1069         cursor.key_beg.delete_tid = 0;
1070         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1071         cursor.key_beg.obj_type = 0;
1072         cursor.key_beg.key = saveoff;
1073
1074         cursor.key_end = cursor.key_beg;
1075         cursor.key_end.key = HAMMER_MAX_KEY;
1076         cursor.asof = ip->obj_asof;
1077         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1078
1079         error = hammer_ip_first(&cursor, ip);
1080
1081         while (error == 0) {
1082                 error = hammer_ip_resolve_record_and_data(&cursor);
1083                 if (error)
1084                         break;
1085                 rec = cursor.record;
1086                 base = &rec->base.base;
1087                 saveoff = base->key;
1088
1089                 if (base->obj_id != ip->obj_id)
1090                         panic("readdir: bad record at %p", cursor.node);
1091
1092                 r = vop_write_dirent(
1093                              &error, uio, rec->entry.obj_id,
1094                              hammer_get_dtype(rec->entry.base.base.obj_type),
1095                              rec->entry.base.data_len,
1096                              (void *)cursor.data);
1097                 if (r)
1098                         break;
1099                 ++saveoff;
1100                 if (cookies)
1101                         cookies[cookie_index] = base->key;
1102                 ++cookie_index;
1103                 if (cookie_index == ncookies)
1104                         break;
1105                 error = hammer_ip_next(&cursor);
1106         }
1107         hammer_done_cursor(&cursor);
1108
1109 done:
1110         hammer_commit_transaction(&trans);
1111
1112         if (ap->a_eofflag)
1113                 *ap->a_eofflag = (error == ENOENT);
1114         uio->uio_offset = saveoff;
1115         if (error && cookie_index == 0) {
1116                 if (error == ENOENT)
1117                         error = 0;
1118                 if (cookies) {
1119                         kfree(cookies, M_TEMP);
1120                         *ap->a_ncookies = 0;
1121                         *ap->a_cookies = NULL;
1122                 }
1123         } else {
1124                 if (error == ENOENT)
1125                         error = 0;
1126                 if (cookies) {
1127                         *ap->a_ncookies = cookie_index;
1128                         *ap->a_cookies = cookies;
1129                 }
1130         }
1131         return(error);
1132 }
1133
1134 /*
1135  * hammer_vop_readlink { vp, uio, cred }
1136  */
1137 static
1138 int
1139 hammer_vop_readlink(struct vop_readlink_args *ap)
1140 {
1141         struct hammer_transaction trans;
1142         struct hammer_cursor cursor;
1143         struct hammer_inode *ip;
1144         int error;
1145
1146         ip = VTOI(ap->a_vp);
1147
1148         hammer_simple_transaction(&trans, ip->hmp);
1149
1150         hammer_init_cursor(&trans, &cursor, &ip->cache[0]);
1151
1152         /*
1153          * Key range (begin and end inclusive) to scan.  Directory keys
1154          * directly translate to a 64 bit 'seek' position.
1155          */
1156         cursor.key_beg.obj_id = ip->obj_id;
1157         cursor.key_beg.create_tid = 0;
1158         cursor.key_beg.delete_tid = 0;
1159         cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1160         cursor.key_beg.obj_type = 0;
1161         cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1162         cursor.asof = ip->obj_asof;
1163         cursor.flags |= HAMMER_CURSOR_ASOF;
1164
1165         error = hammer_ip_lookup(&cursor, ip);
1166         if (error == 0) {
1167                 error = hammer_ip_resolve_data(&cursor);
1168                 if (error == 0) {
1169                         error = uiomove((char *)cursor.data,
1170                                         cursor.record->base.data_len,
1171                                         ap->a_uio);
1172                 }
1173         }
1174         hammer_done_cursor(&cursor);
1175         hammer_commit_transaction(&trans);
1176         return(error);
1177 }
1178
1179 /*
1180  * hammer_vop_nremove { nch, dvp, cred }
1181  */
1182 static
1183 int
1184 hammer_vop_nremove(struct vop_nremove_args *ap)
1185 {
1186         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
1187 }
1188
1189 /*
1190  * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1191  */
1192 static
1193 int
1194 hammer_vop_nrename(struct vop_nrename_args *ap)
1195 {
1196         struct hammer_transaction trans;
1197         struct namecache *fncp;
1198         struct namecache *tncp;
1199         struct hammer_inode *fdip;
1200         struct hammer_inode *tdip;
1201         struct hammer_inode *ip;
1202         struct hammer_cursor cursor;
1203         union hammer_record_ondisk *rec;
1204         int64_t namekey;
1205         int error;
1206
1207         fdip = VTOI(ap->a_fdvp);
1208         tdip = VTOI(ap->a_tdvp);
1209         fncp = ap->a_fnch->ncp;
1210         tncp = ap->a_tnch->ncp;
1211         ip = VTOI(fncp->nc_vp);
1212         KKASSERT(ip != NULL);
1213
1214         if (fdip->flags & HAMMER_INODE_RO)
1215                 return (EROFS);
1216         if (tdip->flags & HAMMER_INODE_RO)
1217                 return (EROFS);
1218         if (ip->flags & HAMMER_INODE_RO)
1219                 return (EROFS);
1220
1221         hammer_start_transaction(&trans, fdip->hmp);
1222
1223         /*
1224          * Remove tncp from the target directory and then link ip as
1225          * tncp. XXX pass trans to dounlink
1226          *
1227          * Force the inode sync-time to match the transaction so it is
1228          * in-sync with the creation of the target directory entry.
1229          */
1230         error = hammer_dounlink(ap->a_tnch, ap->a_tdvp, ap->a_cred, 0);
1231         if (error == 0 || error == ENOENT) {
1232                 error = hammer_ip_add_directory(&trans, tdip, tncp, ip);
1233                 if (error == 0) {
1234                         ip->ino_data.parent_obj_id = tdip->obj_id;
1235                         hammer_modify_inode(&trans, ip,
1236                                 HAMMER_INODE_DDIRTY | HAMMER_INODE_TIDLOCKED);
1237                 }
1238         }
1239         if (error)
1240                 goto failed; /* XXX */
1241
1242         /*
1243          * Locate the record in the originating directory and remove it.
1244          *
1245          * Calculate the namekey and setup the key range for the scan.  This
1246          * works kinda like a chained hash table where the lower 32 bits
1247          * of the namekey synthesize the chain.
1248          *
1249          * The key range is inclusive of both key_beg and key_end.
1250          */
1251         namekey = hammer_directory_namekey(fncp->nc_name, fncp->nc_nlen);
1252 retry:
1253         hammer_init_cursor(&trans, &cursor, &fdip->cache[0]);
1254         cursor.key_beg.obj_id = fdip->obj_id;
1255         cursor.key_beg.key = namekey;
1256         cursor.key_beg.create_tid = 0;
1257         cursor.key_beg.delete_tid = 0;
1258         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1259         cursor.key_beg.obj_type = 0;
1260
1261         cursor.key_end = cursor.key_beg;
1262         cursor.key_end.key |= 0xFFFFFFFFULL;
1263         cursor.asof = fdip->obj_asof;
1264         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1265
1266         /*
1267          * Scan all matching records (the chain), locate the one matching
1268          * the requested path component.
1269          *
1270          * The hammer_ip_*() functions merge in-memory records with on-disk
1271          * records for the purposes of the search.
1272          */
1273         error = hammer_ip_first(&cursor, fdip);
1274         while (error == 0) {
1275                 if (hammer_ip_resolve_data(&cursor) != 0)
1276                         break;
1277                 rec = cursor.record;
1278                 if (fncp->nc_nlen == rec->entry.base.data_len &&
1279                     bcmp(fncp->nc_name, cursor.data, fncp->nc_nlen) == 0) {
1280                         break;
1281                 }
1282                 error = hammer_ip_next(&cursor);
1283         }
1284
1285         /*
1286          * If all is ok we have to get the inode so we can adjust nlinks.
1287          *
1288          * WARNING: hammer_ip_del_directory() may have to terminate the
1289          * cursor to avoid a recursion.  It's ok to call hammer_done_cursor()
1290          * twice.
1291          */
1292         if (error == 0)
1293                 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
1294         hammer_done_cursor(&cursor);
1295         if (error == 0)
1296                 cache_rename(ap->a_fnch, ap->a_tnch);
1297         if (error == EDEADLK)
1298                 goto retry;
1299 failed:
1300         if (error == 0) {
1301                 hammer_commit_transaction(&trans);
1302         } else {
1303                 hammer_abort_transaction(&trans);
1304         }
1305         return (error);
1306 }
1307
1308 /*
1309  * hammer_vop_nrmdir { nch, dvp, cred }
1310  */
1311 static
1312 int
1313 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
1314 {
1315         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
1316 }
1317
1318 /*
1319  * hammer_vop_setattr { vp, vap, cred }
1320  */
1321 static
1322 int
1323 hammer_vop_setattr(struct vop_setattr_args *ap)
1324 {
1325         struct hammer_transaction trans;
1326         struct vattr *vap;
1327         struct hammer_inode *ip;
1328         int modflags;
1329         int error;
1330         int truncating;
1331         int64_t aligned_size;
1332         u_int32_t flags;
1333         uuid_t uuid;
1334
1335         vap = ap->a_vap;
1336         ip = ap->a_vp->v_data;
1337         modflags = 0;
1338
1339         if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1340                 return(EROFS);
1341         if (ip->flags & HAMMER_INODE_RO)
1342                 return (EROFS);
1343
1344         hammer_start_transaction(&trans, ip->hmp);
1345         error = 0;
1346
1347         if (vap->va_flags != VNOVAL) {
1348                 flags = ip->ino_data.uflags;
1349                 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1350                                          hammer_to_unix_xid(&ip->ino_data.uid),
1351                                          ap->a_cred);
1352                 if (error == 0) {
1353                         if (ip->ino_data.uflags != flags) {
1354                                 ip->ino_data.uflags = flags;
1355                                 modflags |= HAMMER_INODE_DDIRTY;
1356                         }
1357                         if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1358                                 error = 0;
1359                                 goto done;
1360                         }
1361                 }
1362                 goto done;
1363         }
1364         if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1365                 error = EPERM;
1366                 goto done;
1367         }
1368         if (vap->va_uid != (uid_t)VNOVAL) {
1369                 hammer_guid_to_uuid(&uuid, vap->va_uid);
1370                 if (bcmp(&uuid, &ip->ino_data.uid, sizeof(uuid)) != 0) {
1371                         ip->ino_data.uid = uuid;
1372                         modflags |= HAMMER_INODE_DDIRTY;
1373                 }
1374         }
1375         if (vap->va_gid != (uid_t)VNOVAL) {
1376                 hammer_guid_to_uuid(&uuid, vap->va_gid);
1377                 if (bcmp(&uuid, &ip->ino_data.gid, sizeof(uuid)) != 0) {
1378                         ip->ino_data.gid = uuid;
1379                         modflags |= HAMMER_INODE_DDIRTY;
1380                 }
1381         }
1382         while (vap->va_size != VNOVAL && ip->ino_rec.ino_size != vap->va_size) {
1383                 switch(ap->a_vp->v_type) {
1384                 case VREG:
1385                         if (vap->va_size == ip->ino_rec.ino_size)
1386                                 break;
1387                         if (vap->va_size < ip->ino_rec.ino_size) {
1388                                 vtruncbuf(ap->a_vp, vap->va_size,
1389                                           HAMMER_BUFSIZE);
1390                                 truncating = 1;
1391                         } else {
1392                                 vnode_pager_setsize(ap->a_vp, vap->va_size);
1393                                 truncating = 0;
1394                         }
1395                         ip->ino_rec.ino_size = vap->va_size;
1396                         modflags |= HAMMER_INODE_RDIRTY;
1397                         aligned_size = (vap->va_size + HAMMER_BUFMASK) &
1398                                         ~(int64_t)HAMMER_BUFMASK;
1399
1400                         if (truncating) {
1401                                 error = hammer_ip_delete_range(&trans, ip,
1402                                                     aligned_size,
1403                                                     0x7FFFFFFFFFFFFFFFLL);
1404                         }
1405                         /*
1406                          * If truncating we have to clean out a portion of
1407                          * the last block on-disk.
1408                          */
1409                         if (truncating && error == 0 &&
1410                             vap->va_size < aligned_size) {
1411                                 struct buf *bp;
1412                                 int offset;
1413
1414                                 offset = vap->va_size & HAMMER_BUFMASK;
1415                                 error = bread(ap->a_vp,
1416                                               aligned_size - HAMMER_BUFSIZE,
1417                                               HAMMER_BUFSIZE, &bp);
1418                                 if (error == 0) {
1419                                         bzero(bp->b_data + offset,
1420                                               HAMMER_BUFSIZE - offset);
1421                                         if (bp->b_tid == 0)
1422                                                 bp->b_tid = trans.tid;
1423                                         bdwrite(bp);
1424                                 } else {
1425                                         brelse(bp);
1426                                 }
1427                         }
1428                         break;
1429                 case VDATABASE:
1430                         error = hammer_ip_delete_range(&trans, ip,
1431                                                     vap->va_size,
1432                                                     0x7FFFFFFFFFFFFFFFLL);
1433                         ip->ino_rec.ino_size = vap->va_size;
1434                         modflags |= HAMMER_INODE_RDIRTY;
1435                         break;
1436                 default:
1437                         error = EINVAL;
1438                         goto done;
1439                 }
1440                 break;
1441         }
1442         if (vap->va_atime.tv_sec != VNOVAL) {
1443                 ip->ino_rec.ino_atime =
1444                         hammer_timespec_to_transid(&vap->va_atime);
1445                 modflags |= HAMMER_INODE_ITIMES;
1446         }
1447         if (vap->va_mtime.tv_sec != VNOVAL) {
1448                 ip->ino_rec.ino_mtime =
1449                         hammer_timespec_to_transid(&vap->va_mtime);
1450                 modflags |= HAMMER_INODE_ITIMES;
1451         }
1452         if (vap->va_mode != (mode_t)VNOVAL) {
1453                 if (ip->ino_data.mode != vap->va_mode) {
1454                         ip->ino_data.mode = vap->va_mode;
1455                         modflags |= HAMMER_INODE_DDIRTY;
1456                 }
1457         }
1458 done:
1459         if (error) {
1460                 hammer_abort_transaction(&trans);
1461         } else {
1462                 hammer_modify_inode(&trans, ip, modflags);
1463                 hammer_commit_transaction(&trans);
1464         }
1465         return (error);
1466 }
1467
1468 /*
1469  * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1470  */
1471 static
1472 int
1473 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
1474 {
1475         struct hammer_transaction trans;
1476         struct hammer_inode *dip;
1477         struct hammer_inode *nip;
1478         struct nchandle *nch;
1479         hammer_record_t record;
1480         int error;
1481         int bytes;
1482
1483         ap->a_vap->va_type = VLNK;
1484
1485         nch = ap->a_nch;
1486         dip = VTOI(ap->a_dvp);
1487
1488         if (dip->flags & HAMMER_INODE_RO)
1489                 return (EROFS);
1490
1491         /*
1492          * Create a transaction to cover the operations we perform.
1493          */
1494         hammer_start_transaction(&trans, dip->hmp);
1495
1496         /*
1497          * Create a new filesystem object of the requested type.  The
1498          * returned inode will be referenced but not locked.
1499          */
1500
1501         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
1502         if (error) {
1503                 hammer_abort_transaction(&trans);
1504                 *ap->a_vpp = NULL;
1505                 return (error);
1506         }
1507
1508         /*
1509          * Add the new filesystem object to the directory.  This will also
1510          * bump the inode's link count.
1511          */
1512         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
1513
1514         /*
1515          * Add a record representing the symlink.  symlink stores the link
1516          * as pure data, not a string, and is no \0 terminated.
1517          */
1518         if (error == 0) {
1519                 record = hammer_alloc_mem_record(nip);
1520                 bytes = strlen(ap->a_target);
1521
1522                 record->rec.base.base.key = HAMMER_FIXKEY_SYMLINK;
1523                 record->rec.base.base.rec_type = HAMMER_RECTYPE_FIX;
1524                 record->rec.base.data_len = bytes;
1525                 record->data = (void *)ap->a_target;
1526                 /* will be reallocated by routine below */
1527                 error = hammer_ip_add_record(&trans, record);
1528
1529                 /*
1530                  * Set the file size to the length of the link.
1531                  */
1532                 if (error == 0) {
1533                         nip->ino_rec.ino_size = bytes;
1534                         hammer_modify_inode(&trans, nip, HAMMER_INODE_RDIRTY);
1535                 }
1536         }
1537
1538         /*
1539          * Finish up.
1540          */
1541         if (error) {
1542                 hammer_rel_inode(nip, 0);
1543                 hammer_abort_transaction(&trans);
1544                 *ap->a_vpp = NULL;
1545         } else {
1546                 hammer_commit_transaction(&trans);
1547                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
1548                 hammer_rel_inode(nip, 0);
1549                 if (error == 0) {
1550                         cache_setunresolved(ap->a_nch);
1551                         cache_setvp(ap->a_nch, *ap->a_vpp);
1552                 }
1553         }
1554         return (error);
1555 }
1556
1557 /*
1558  * hammer_vop_nwhiteout { nch, dvp, cred, flags }
1559  */
1560 static
1561 int
1562 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
1563 {
1564         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, ap->a_flags));
1565 }
1566
1567 /*
1568  * hammer_vop_ioctl { vp, command, data, fflag, cred }
1569  */
1570 static
1571 int
1572 hammer_vop_ioctl(struct vop_ioctl_args *ap)
1573 {
1574         struct hammer_inode *ip = ap->a_vp->v_data;
1575
1576         return(hammer_ioctl(ip, ap->a_command, ap->a_data,
1577                             ap->a_fflag, ap->a_cred));
1578 }
1579
1580 static
1581 int
1582 hammer_vop_mountctl(struct vop_mountctl_args *ap)
1583 {
1584         struct mount *mp;
1585         int error;
1586
1587         mp = ap->a_head.a_ops->head.vv_mount;
1588
1589         switch(ap->a_op) {
1590         case MOUNTCTL_SET_EXPORT:
1591                 if (ap->a_ctllen != sizeof(struct export_args))
1592                         error = EINVAL;
1593                 error = hammer_vfs_export(mp, ap->a_op,
1594                                       (const struct export_args *)ap->a_ctl);
1595                 break;
1596         default:
1597                 error = journal_mountctl(ap);
1598                 break;
1599         }
1600         return(error);
1601 }
1602
1603 /*
1604  * hammer_vop_strategy { vp, bio }
1605  *
1606  * Strategy call, used for regular file read & write only.  Note that the
1607  * bp may represent a cluster.
1608  *
1609  * To simplify operation and allow better optimizations in the future,
1610  * this code does not make any assumptions with regards to buffer alignment
1611  * or size.
1612  */
1613 static
1614 int
1615 hammer_vop_strategy(struct vop_strategy_args *ap)
1616 {
1617         struct buf *bp;
1618         int error;
1619
1620         bp = ap->a_bio->bio_buf;
1621
1622         switch(bp->b_cmd) {
1623         case BUF_CMD_READ:
1624                 error = hammer_vop_strategy_read(ap);
1625                 break;
1626         case BUF_CMD_WRITE:
1627                 error = hammer_vop_strategy_write(ap);
1628                 break;
1629         default:
1630                 error = EINVAL;
1631                 break;
1632         }
1633         bp->b_error = error;
1634         if (error)
1635                 bp->b_flags |= B_ERROR;
1636         biodone(ap->a_bio);
1637         return (error);
1638 }
1639
1640 /*
1641  * Read from a regular file.  Iterate the related records and fill in the
1642  * BIO/BUF.  Gaps are zero-filled.
1643  *
1644  * The support code in hammer_object.c should be used to deal with mixed
1645  * in-memory and on-disk records.
1646  *
1647  * XXX atime update
1648  */
1649 static
1650 int
1651 hammer_vop_strategy_read(struct vop_strategy_args *ap)
1652 {
1653         struct hammer_transaction trans;
1654         struct hammer_inode *ip;
1655         struct hammer_cursor cursor;
1656         hammer_record_ondisk_t rec;
1657         hammer_base_elm_t base;
1658         struct bio *bio;
1659         struct buf *bp;
1660         int64_t rec_offset;
1661         int64_t ran_end;
1662         int64_t tmp64;
1663         int error;
1664         int boff;
1665         int roff;
1666         int n;
1667
1668         bio = ap->a_bio;
1669         bp = bio->bio_buf;
1670         ip = ap->a_vp->v_data;
1671
1672         hammer_simple_transaction(&trans, ip->hmp);
1673         hammer_init_cursor(&trans, &cursor, &ip->cache[0]);
1674
1675         /*
1676          * Key range (begin and end inclusive) to scan.  Note that the key's
1677          * stored in the actual records represent BASE+LEN, not BASE.  The
1678          * first record containing bio_offset will have a key > bio_offset.
1679          */
1680         cursor.key_beg.obj_id = ip->obj_id;
1681         cursor.key_beg.create_tid = 0;
1682         cursor.key_beg.delete_tid = 0;
1683         cursor.key_beg.obj_type = 0;
1684         cursor.key_beg.key = bio->bio_offset + 1;
1685         cursor.asof = ip->obj_asof;
1686         cursor.flags |= HAMMER_CURSOR_ASOF | HAMMER_CURSOR_DATAEXTOK;
1687
1688         cursor.key_end = cursor.key_beg;
1689         if (ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1690                 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
1691                 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
1692                 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1693         } else {
1694                 ran_end = bio->bio_offset + bp->b_bufsize;
1695                 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
1696                 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
1697                 tmp64 = ran_end + MAXPHYS + 1;  /* work-around GCC-4 bug */
1698                 if (tmp64 < ran_end)
1699                         cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1700                 else
1701                         cursor.key_end.key = ran_end + MAXPHYS + 1;
1702         }
1703         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
1704
1705         error = hammer_ip_first(&cursor, ip);
1706         boff = 0;
1707
1708         while (error == 0) {
1709                 error = hammer_ip_resolve_data(&cursor);
1710                 if (error)
1711                         break;
1712                 rec = cursor.record;
1713                 base = &rec->base.base;
1714
1715                 rec_offset = base->key - rec->data.base.data_len;
1716
1717                 /*
1718                  * Calculate the gap, if any, and zero-fill it.
1719                  */
1720                 n = (int)(rec_offset - (bio->bio_offset + boff));
1721                 if (n > 0) {
1722                         if (n > bp->b_bufsize - boff)
1723                                 n = bp->b_bufsize - boff;
1724                         bzero((char *)bp->b_data + boff, n);
1725                         boff += n;
1726                         n = 0;
1727                 }
1728
1729                 /*
1730                  * Calculate the data offset in the record and the number
1731                  * of bytes we can copy.
1732                  *
1733                  * Note there is a degenerate case here where boff may
1734                  * already be at bp->b_bufsize.
1735                  */
1736                 roff = -n;
1737                 n = rec->data.base.data_len - roff;
1738                 KKASSERT(n > 0);
1739                 if (n > bp->b_bufsize - boff)
1740                         n = bp->b_bufsize - boff;
1741                 bcopy((char *)cursor.data + roff,
1742                       (char *)bp->b_data + boff, n);
1743                 boff += n;
1744                 if (boff == bp->b_bufsize)
1745                         break;
1746                 error = hammer_ip_next(&cursor);
1747         }
1748         hammer_done_cursor(&cursor);
1749         hammer_commit_transaction(&trans);
1750
1751         /*
1752          * There may have been a gap after the last record
1753          */
1754         if (error == ENOENT)
1755                 error = 0;
1756         if (error == 0 && boff != bp->b_bufsize) {
1757                 KKASSERT(boff < bp->b_bufsize);
1758                 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
1759                 /* boff = bp->b_bufsize; */
1760         }
1761         bp->b_resid = 0;
1762         return(error);
1763 }
1764
1765 /*
1766  * Write to a regular file.  Iterate the related records and mark for
1767  * deletion.  If existing edge records (left and right side) overlap our
1768  * write they have to be marked deleted and new records created, usually
1769  * referencing a portion of the original data.  Then add a record to
1770  * represent the buffer.
1771  *
1772  * The support code in hammer_object.c should be used to deal with mixed
1773  * in-memory and on-disk records.
1774  */
1775 static
1776 int
1777 hammer_vop_strategy_write(struct vop_strategy_args *ap)
1778 {
1779         struct hammer_transaction trans;
1780         hammer_inode_t ip;
1781         struct bio *bio;
1782         struct buf *bp;
1783         int error;
1784
1785         bio = ap->a_bio;
1786         bp = bio->bio_buf;
1787         ip = ap->a_vp->v_data;
1788
1789         if (ip->flags & HAMMER_INODE_RO)
1790                 return (EROFS);
1791
1792         /*
1793          * Start a transaction using the TID stored with the bp.
1794          */
1795         KKASSERT(bp->b_tid != 0);
1796         hammer_start_transaction_tid(&trans, ip->hmp, bp->b_tid);
1797
1798         /*
1799          * Delete any records overlapping our range.  This function will
1800          * (eventually) properly truncate partial overlaps.
1801          */
1802         if (ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1803                 error = hammer_ip_delete_range(&trans, ip, bio->bio_offset,
1804                                                bio->bio_offset);
1805         } else {
1806                 error = hammer_ip_delete_range(&trans, ip, bio->bio_offset,
1807                                                bio->bio_offset +
1808                                                 bp->b_bufsize - 1);
1809         }
1810
1811         /*
1812          * Add a single record to cover the write.  We can write a record
1813          * with only the actual file data - for example, a small 200 byte
1814          * file does not have to write out a 16K record.
1815          *
1816          * While the data size does not have to be aligned, we still do it
1817          * to reduce fragmentation in a future allocation model.
1818          */
1819         if (error == 0) {
1820                 int limit_size;
1821
1822                 if (ip->ino_rec.ino_size - bio->bio_offset > bp->b_bufsize) {
1823                         limit_size = bp->b_bufsize;
1824                 } else {
1825                         limit_size = (int)(ip->ino_rec.ino_size -
1826                                            bio->bio_offset);
1827                         KKASSERT(limit_size >= 0);
1828                         limit_size = (limit_size + 63) & ~63;
1829                 }
1830                 error = hammer_ip_sync_data(&trans, ip, bio->bio_offset,
1831                                             bp->b_data, limit_size);
1832         }
1833
1834         /*
1835          * If an error occured abort the transaction
1836          */
1837         if (error) {
1838                 /* XXX undo deletion */
1839                 hammer_abort_transaction(&trans);
1840                 bp->b_resid = bp->b_bufsize;
1841         } else {
1842                 hammer_commit_transaction(&trans);
1843                 bp->b_resid = 0;
1844                 bp->b_tid = 0;
1845         }
1846         return(error);
1847 }
1848
1849 /*
1850  * dounlink - disconnect a directory entry
1851  *
1852  * XXX whiteout support not really in yet
1853  */
1854 static int
1855 hammer_dounlink(struct nchandle *nch, struct vnode *dvp, struct ucred *cred,
1856                 int flags)
1857 {
1858         struct hammer_transaction trans;
1859         struct namecache *ncp;
1860         hammer_inode_t dip;
1861         hammer_inode_t ip;
1862         hammer_record_ondisk_t rec;
1863         struct hammer_cursor cursor;
1864         int64_t namekey;
1865         int error;
1866
1867         /*
1868          * Calculate the namekey and setup the key range for the scan.  This
1869          * works kinda like a chained hash table where the lower 32 bits
1870          * of the namekey synthesize the chain.
1871          *
1872          * The key range is inclusive of both key_beg and key_end.
1873          */
1874         dip = VTOI(dvp);
1875         ncp = nch->ncp;
1876
1877         if (dip->flags & HAMMER_INODE_RO)
1878                 return (EROFS);
1879
1880         hammer_start_transaction(&trans, dip->hmp);
1881
1882         namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
1883 retry:
1884         hammer_init_cursor(&trans, &cursor, &dip->cache[0]);
1885         cursor.key_beg.obj_id = dip->obj_id;
1886         cursor.key_beg.key = namekey;
1887         cursor.key_beg.create_tid = 0;
1888         cursor.key_beg.delete_tid = 0;
1889         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1890         cursor.key_beg.obj_type = 0;
1891
1892         cursor.key_end = cursor.key_beg;
1893         cursor.key_end.key |= 0xFFFFFFFFULL;
1894         cursor.asof = dip->obj_asof;
1895         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1896
1897         /*
1898          * Scan all matching records (the chain), locate the one matching
1899          * the requested path component.  info->last_error contains the
1900          * error code on search termination and could be 0, ENOENT, or
1901          * something else.
1902          *
1903          * The hammer_ip_*() functions merge in-memory records with on-disk
1904          * records for the purposes of the search.
1905          */
1906         error = hammer_ip_first(&cursor, dip);
1907         while (error == 0) {
1908                 error = hammer_ip_resolve_data(&cursor);
1909                 if (error)
1910                         break;
1911                 rec = cursor.record;
1912                 if (ncp->nc_nlen == rec->entry.base.data_len &&
1913                     bcmp(ncp->nc_name, cursor.data, ncp->nc_nlen) == 0) {
1914                         break;
1915                 }
1916                 error = hammer_ip_next(&cursor);
1917         }
1918
1919         /*
1920          * If all is ok we have to get the inode so we can adjust nlinks.
1921          *
1922          * If the target is a directory, it must be empty.
1923          */
1924         if (error == 0) {
1925                 ip = hammer_get_inode(&trans, &dip->cache[1],
1926                                       rec->entry.obj_id,
1927                                       dip->hmp->asof, 0, &error);
1928                 if (error == ENOENT) {
1929                         kprintf("obj_id %016llx\n", rec->entry.obj_id);
1930                         Debugger("ENOENT unlinking object that should exist, cont to sync");
1931                         hammer_sync_hmp(dip->hmp, MNT_NOWAIT);
1932                         Debugger("ENOENT - sync done");
1933                 }
1934                 if (error == 0 && ip->ino_rec.base.base.obj_type ==
1935                                   HAMMER_OBJTYPE_DIRECTORY) {
1936                         error = hammer_ip_check_directory_empty(&trans, ip);
1937                 }
1938                 /*
1939                  * WARNING: hammer_ip_del_directory() may have to terminate
1940                  * the cursor to avoid a lock recursion.  It's ok to call
1941                  * hammer_done_cursor() twice.
1942                  */
1943                 if (error == 0)
1944                         error = hammer_ip_del_directory(&trans, &cursor, dip, ip);
1945                 if (error == 0) {
1946                         cache_setunresolved(nch);
1947                         cache_setvp(nch, NULL);
1948                         /* XXX locking */
1949                         if (ip->vp)
1950                                 cache_inval_vp(ip->vp, CINV_DESTROY);
1951                 }
1952                 hammer_rel_inode(ip, 0);
1953         }
1954         hammer_done_cursor(&cursor);
1955         if (error == EDEADLK)
1956                 goto retry;
1957
1958         if (error == 0)
1959                 hammer_commit_transaction(&trans);
1960         else
1961                 hammer_abort_transaction(&trans);
1962         return (error);
1963 }
1964
1965 /************************************************************************
1966  *                          FIFO AND SPECFS OPS                         *
1967  ************************************************************************
1968  *
1969  */
1970
1971 static int
1972 hammer_vop_fifoclose (struct vop_close_args *ap)
1973 {
1974         /* XXX update itimes */
1975         return (VOCALL(&fifo_vnode_vops, &ap->a_head));
1976 }
1977
1978 static int
1979 hammer_vop_fiforead (struct vop_read_args *ap)
1980 {
1981         int error;
1982
1983         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1984         /* XXX update access time */
1985         return (error);
1986 }
1987
1988 static int
1989 hammer_vop_fifowrite (struct vop_write_args *ap)
1990 {
1991         int error;
1992
1993         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1994         /* XXX update access time */
1995         return (error);
1996 }
1997
1998 static int
1999 hammer_vop_specclose (struct vop_close_args *ap)
2000 {
2001         /* XXX update itimes */
2002         return (VOCALL(&spec_vnode_vops, &ap->a_head));
2003 }
2004
2005 static int
2006 hammer_vop_specread (struct vop_read_args *ap)
2007 {
2008         /* XXX update access time */
2009         return (VOCALL(&spec_vnode_vops, &ap->a_head));
2010 }
2011
2012 static int
2013 hammer_vop_specwrite (struct vop_write_args *ap)
2014 {
2015         /* XXX update last change time */
2016         return (VOCALL(&spec_vnode_vops, &ap->a_head));
2017 }
2018