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 1.31 2008/02/10 18:58:23 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                 /*
 370                  * The file write must be tagged with the same TID as the
 371                  * inode, for consistency in case the inode changed size.
 372                  * This guarantees the on-disk data records will have a
 373                  * TID <= the inode TID representing the size change.
 374                  *
 375                  * If a prior write has not yet flushed, retain its TID.
 376                  */
 377                 if (bp->b_tid == 0)
 378                         bp->b_tid = ip->last_tid;
 379
 380                 if (ap->a_ioflag & IO_SYNC) {
 381                         bwrite(bp);
 382                 } else if (ap->a_ioflag & IO_DIRECT) {
 383                         bawrite(bp);
 384                 } else if ((ap->a_ioflag >> 16) > 1 &&
 385                            (uio->uio_offset & HAMMER_BUFMASK) == 0) {
 386                         /*
 387                          * If seqcount indicates sequential operation and
 388                          * we just finished filling a buffer, push it out
 389                          * now to prevent the buffer cache from becoming
 390                          * too full, which would trigger non-optimal
 391                          * flushes.
 392                          */
 393                         bawrite(bp);
 394                 } else {
 395                         bdwrite(bp);
 396                 }
 397         }
 398         if (error)
 399                 hammer_abort_transaction(&trans);
 400         else
 401                 hammer_commit_transaction(&trans);
 402         return (error);
 403 }
 404
 405 /*
 406  * hammer_vop_access { vp, mode, cred }
 407  */
 408 static
 409 int
 410 hammer_vop_access(struct vop_access_args *ap)
 411 {
 412         struct hammer_inode *ip = VTOI(ap->a_vp);
 413         uid_t uid;
 414         gid_t gid;
 415         int error;
 416
 417         uid = hammer_to_unix_xid(&ip->ino_data.uid);
 418         gid = hammer_to_unix_xid(&ip->ino_data.gid);
 419
 420         error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
 421                                   ip->ino_data.uflags);
 422         return (error);
 423 }
 424
 425 /*
 426  * hammer_vop_advlock { vp, id, op, fl, flags }
 427  */
 428 static
 429 int
 430 hammer_vop_advlock(struct vop_advlock_args *ap)
 431 {
 432         struct hammer_inode *ip = VTOI(ap->a_vp);
 433
 434         return (lf_advlock(ap, &ip->advlock, ip->ino_rec.ino_size));
 435 }
 436
 437 /*
 438  * hammer_vop_close { vp, fflag }
 439  */
 440 static
 441 int
 442 hammer_vop_close(struct vop_close_args *ap)
 443 {
 444         return (vop_stdclose(ap));
 445 }
 446
 447 /*
 448  * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
 449  *
 450  * The operating system has already ensured that the directory entry
 451  * does not exist and done all appropriate namespace locking.
 452  */
 453 static
 454 int
 455 hammer_vop_ncreate(struct vop_ncreate_args *ap)
 456 {
 457         struct hammer_transaction trans;
 458         struct hammer_inode *dip;
 459         struct hammer_inode *nip;
 460         struct nchandle *nch;
 461         int error;
 462
 463         nch = ap->a_nch;
 464         dip = VTOI(ap->a_dvp);
 465
 466         if (dip->flags & HAMMER_INODE_RO)
 467                 return (EROFS);
 468
 469         /*
 470          * Create a transaction to cover the operations we perform.
 471          */
 472         hammer_start_transaction(&trans, dip->hmp);
 473
 474         /*
 475          * Create a new filesystem object of the requested type.  The
 476          * returned inode will be referenced but not locked.
 477          */
 478
 479         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 480         if (error)
 481                 kprintf("hammer_create_inode error %d\n", error);
 482         if (error) {
 483                 hammer_abort_transaction(&trans);
 484                 *ap->a_vpp = NULL;
 485                 return (error);
 486         }
 487
 488         /*
 489          * Add the new filesystem object to the directory.  This will also
 490          * bump the inode's link count.
 491          */
 492         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 493         if (error)
 494                 kprintf("hammer_ip_add_directory error %d\n", error);
 495
 496         /*
 497          * Finish up.
 498          */
 499         if (error) {
 500                 hammer_rel_inode(nip, 0);
 501                 hammer_abort_transaction(&trans);
 502                 *ap->a_vpp = NULL;
 503         } else {
 504                 hammer_commit_transaction(&trans);
 505                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 506                 hammer_rel_inode(nip, 0);
 507                 if (error == 0) {
 508                         cache_setunresolved(ap->a_nch);
 509                         cache_setvp(ap->a_nch, *ap->a_vpp);
 510                 }
 511         }
 512         return (error);
 513 }
 514
 515 /*
 516  * hammer_vop_getattr { vp, vap }
 517  */
 518 static
 519 int
 520 hammer_vop_getattr(struct vop_getattr_args *ap)
 521 {
 522         struct hammer_inode *ip = VTOI(ap->a_vp);
 523         struct vattr *vap = ap->a_vap;
 524
 525 #if 0
 526         if (cache_check_fsmid_vp(ap->a_vp, &ip->fsmid) &&
 527             (vp->v_mount->mnt_flag & MNT_RDONLY) == 0 &&
 528             ip->obj_asof == XXX
 529         ) {
 530                 /* LAZYMOD XXX */
 531         }
 532         hammer_itimes(ap->a_vp);
 533 #endif
 534
 535         vap->va_fsid = ip->hmp->fsid_udev;
 536         vap->va_fileid = ip->ino_rec.base.base.obj_id;
 537         vap->va_mode = ip->ino_data.mode;
 538         vap->va_nlink = ip->ino_rec.ino_nlinks;
 539         vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
 540         vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
 541         vap->va_rmajor = 0;
 542         vap->va_rminor = 0;
 543         vap->va_size = ip->ino_rec.ino_size;
 544         hammer_to_timespec(ip->ino_rec.ino_atime, &vap->va_atime);
 545         hammer_to_timespec(ip->ino_rec.ino_mtime, &vap->va_mtime);
 546         hammer_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
 547         vap->va_flags = ip->ino_data.uflags;
 548         vap->va_gen = 1;        /* hammer inums are unique for all time */
 549         vap->va_blocksize = 32768; /* XXX - extract from root volume */
 550         vap->va_bytes = ip->ino_rec.ino_size;
 551         vap->va_type = hammer_get_vnode_type(ip->ino_rec.base.base.obj_type);
 552         vap->va_filerev = 0;    /* XXX */
 553         /* mtime uniquely identifies any adjustments made to the file */
 554         vap->va_fsmid = ip->ino_rec.ino_mtime;
 555         vap->va_uid_uuid = ip->ino_data.uid;
 556         vap->va_gid_uuid = ip->ino_data.gid;
 557         vap->va_fsid_uuid = ip->hmp->fsid;
 558         vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
 559                           VA_FSID_UUID_VALID;
 560
 561         switch (ip->ino_rec.base.base.obj_type) {
 562         case HAMMER_OBJTYPE_CDEV:
 563         case HAMMER_OBJTYPE_BDEV:
 564                 vap->va_rmajor = ip->ino_data.rmajor;
 565                 vap->va_rminor = ip->ino_data.rminor;
 566                 break;
 567         default:
 568                 break;
 569         }
 570
 571         return(0);
 572 }
 573
 574 /*
 575  * hammer_vop_nresolve { nch, dvp, cred }
 576  *
 577  * Locate the requested directory entry.
 578  */
 579 static
 580 int
 581 hammer_vop_nresolve(struct vop_nresolve_args *ap)
 582 {
 583         struct namecache *ncp;
 584         hammer_inode_t dip;
 585         hammer_inode_t ip;
 586         hammer_tid_t asof;
 587         struct hammer_cursor cursor;
 588         union hammer_record_ondisk *rec;
 589         struct vnode *vp;
 590         int64_t namekey;
 591         int error;
 592         int i;
 593         int nlen;
 594         int flags;
 595         u_int64_t obj_id;
 596
 597         /*
 598          * Misc initialization, plus handle as-of name extensions.  Look for
 599          * the '@@' extension.  Note that as-of files and directories cannot
 600          * be modified.
 601          */
 602         dip = VTOI(ap->a_dvp);
 603         ncp = ap->a_nch->ncp;
 604         asof = dip->obj_asof;
 605         nlen = ncp->nc_nlen;
 606         flags = dip->flags;
 607
 608         for (i = 0; i < nlen; ++i) {
 609                 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
 610                         asof = hammer_str_to_tid(ncp->nc_name + i + 2);
 611                         flags |= HAMMER_INODE_RO;
 612                         break;
 613                 }
 614         }
 615         nlen = i;
 616
 617         /*
 618          * If there is no path component the time extension is relative to
 619          * dip.
 620          */
 621         if (nlen == 0) {
 622                 ip = hammer_get_inode(dip->hmp, &dip->cache[1], dip->obj_id,
 623                                       asof, flags, &error);
 624                 if (error == 0) {
 625                         error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
 626                         hammer_rel_inode(ip, 0);
 627                 } else {
 628                         vp = NULL;
 629                 }
 630                 if (error == 0) {
 631                         vn_unlock(vp);
 632                         cache_setvp(ap->a_nch, vp);
 633                         vrele(vp);
 634                 }
 635                 return(error);
 636         }
 637
 638         /*
 639          * Calculate the namekey and setup the key range for the scan.  This
 640          * works kinda like a chained hash table where the lower 32 bits
 641          * of the namekey synthesize the chain.
 642          *
 643          * The key range is inclusive of both key_beg and key_end.
 644          */
 645         namekey = hammer_directory_namekey(ncp->nc_name, nlen);
 646
 647         error = hammer_init_cursor_hmp(&cursor, &dip->cache[0], dip->hmp);
 648         cursor.key_beg.obj_id = dip->obj_id;
 649         cursor.key_beg.key = namekey;
 650         cursor.key_beg.create_tid = 0;
 651         cursor.key_beg.delete_tid = 0;
 652         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
 653         cursor.key_beg.obj_type = 0;
 654
 655         cursor.key_end = cursor.key_beg;
 656         cursor.key_end.key |= 0xFFFFFFFFULL;
 657         cursor.asof = asof;
 658         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
 659
 660         /*
 661          * Scan all matching records (the chain), locate the one matching
 662          * the requested path component.
 663          *
 664          * The hammer_ip_*() functions merge in-memory records with on-disk
 665          * records for the purposes of the search.
 666          */
 667         if (error == 0)
 668                 error = hammer_ip_first(&cursor, dip);
 669
 670         rec = NULL;
 671         obj_id = 0;
 672
 673         while (error == 0) {
 674                 error = hammer_ip_resolve_data(&cursor);
 675                 if (error)
 676                         break;
 677                 rec = cursor.record;
 678                 if (nlen == rec->entry.base.data_len &&
 679                     bcmp(ncp->nc_name, cursor.data, nlen) == 0) {
 680                         obj_id = rec->entry.obj_id;
 681                         break;
 682                 }
 683                 error = hammer_ip_next(&cursor);
 684         }
 685         hammer_done_cursor(&cursor);
 686         if (error == 0) {
 687                 ip = hammer_get_inode(dip->hmp, &dip->cache[1],
 688                                       obj_id, asof, flags, &error);
 689                 if (error == 0) {
 690                         error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
 691                         hammer_rel_inode(ip, 0);
 692                 } else {
 693                         vp = NULL;
 694                 }
 695                 if (error == 0) {
 696                         vn_unlock(vp);
 697                         cache_setvp(ap->a_nch, vp);
 698                         vrele(vp);
 699                 }
 700         } else if (error == ENOENT) {
 701                 cache_setvp(ap->a_nch, NULL);
 702         }
 703         return (error);
 704 }
 705
 706 /*
 707  * hammer_vop_nlookupdotdot { dvp, vpp, cred }
 708  *
 709  * Locate the parent directory of a directory vnode.
 710  *
 711  * dvp is referenced but not locked.  *vpp must be returned referenced and
 712  * locked.  A parent_obj_id of 0 does not necessarily indicate that we are
 713  * at the root, instead it could indicate that the directory we were in was
 714  * removed.
 715  *
 716  * NOTE: as-of sequences are not linked into the directory structure.  If
 717  * we are at the root with a different asof then the mount point, reload
 718  * the same directory with the mount point's asof.   I'm not sure what this
 719  * will do to NFS.  We encode ASOF stamps in NFS file handles so it might not
 720  * get confused, but it hasn't been tested.
 721  */
 722 static
 723 int
 724 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
 725 {
 726         struct hammer_inode *dip;
 727         struct hammer_inode *ip;
 728         int64_t parent_obj_id;
 729         hammer_tid_t asof;
 730         int error;
 731
 732         dip = VTOI(ap->a_dvp);
 733         asof = dip->obj_asof;
 734         parent_obj_id = dip->ino_data.parent_obj_id;
 735
 736         if (parent_obj_id == 0) {
 737                 if (dip->obj_id == HAMMER_OBJID_ROOT &&
 738                    asof != dip->hmp->asof) {
 739                         parent_obj_id = dip->obj_id;
 740                         asof = dip->hmp->asof;
 741                         *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
 742                         ksnprintf(*ap->a_fakename, 19, "0x%016llx",
 743                                    dip->obj_asof);
 744                 } else {
 745                         *ap->a_vpp = NULL;
 746                         return ENOENT;
 747                 }
 748         }
 749
 750         ip = hammer_get_inode(dip->hmp, &dip->cache[1], parent_obj_id,
 751                               asof, dip->flags, &error);
 752         if (ip == NULL) {
 753                 *ap->a_vpp = NULL;
 754                 return(error);
 755         }
 756         error = hammer_get_vnode(ip, LK_EXCLUSIVE, ap->a_vpp);
 757         hammer_rel_inode(ip, 0);
 758         return (error);
 759 }
 760
 761 /*
 762  * hammer_vop_nlink { nch, dvp, vp, cred }
 763  */
 764 static
 765 int
 766 hammer_vop_nlink(struct vop_nlink_args *ap)
 767 {
 768         struct hammer_transaction trans;
 769         struct hammer_inode *dip;
 770         struct hammer_inode *ip;
 771         struct nchandle *nch;
 772         int error;
 773
 774         nch = ap->a_nch;
 775         dip = VTOI(ap->a_dvp);
 776         ip = VTOI(ap->a_vp);
 777
 778         if (dip->flags & HAMMER_INODE_RO)
 779                 return (EROFS);
 780         if (ip->flags & HAMMER_INODE_RO)
 781                 return (EROFS);
 782
 783         /*
 784          * Create a transaction to cover the operations we perform.
 785          */
 786         hammer_start_transaction(&trans, dip->hmp);
 787
 788         /*
 789          * Add the filesystem object to the directory.  Note that neither
 790          * dip nor ip are referenced or locked, but their vnodes are
 791          * referenced.  This function will bump the inode's link count.
 792          */
 793         error = hammer_ip_add_directory(&trans, dip, nch->ncp, ip);
 794
 795         /*
 796          * Finish up.
 797          */
 798         if (error) {
 799                 hammer_abort_transaction(&trans);
 800         } else {
 801                 cache_setunresolved(nch);
 802                 cache_setvp(nch, ap->a_vp);
 803                 hammer_commit_transaction(&trans);
 804         }
 805         return (error);
 806 }
 807
 808 /*
 809  * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
 810  *
 811  * The operating system has already ensured that the directory entry
 812  * does not exist and done all appropriate namespace locking.
 813  */
 814 static
 815 int
 816 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
 817 {
 818         struct hammer_transaction trans;
 819         struct hammer_inode *dip;
 820         struct hammer_inode *nip;
 821         struct nchandle *nch;
 822         int error;
 823
 824         nch = ap->a_nch;
 825         dip = VTOI(ap->a_dvp);
 826
 827         if (dip->flags & HAMMER_INODE_RO)
 828                 return (EROFS);
 829
 830         /*
 831          * Create a transaction to cover the operations we perform.
 832          */
 833         hammer_start_transaction(&trans, dip->hmp);
 834
 835         /*
 836          * Create a new filesystem object of the requested type.  The
 837          * returned inode will be referenced but not locked.
 838          */
 839         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 840         if (error)
 841                 kprintf("hammer_mkdir error %d\n", error);
 842         if (error) {
 843                 hammer_abort_transaction(&trans);
 844                 *ap->a_vpp = NULL;
 845                 return (error);
 846         }
 847
 848         /*
 849          * Add the new filesystem object to the directory.  This will also
 850          * bump the inode's link count.
 851          */
 852         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 853         if (error)
 854                 kprintf("hammer_mkdir (add) error %d\n", error);
 855
 856         /*
 857          * Finish up.
 858          */
 859         if (error) {
 860                 hammer_rel_inode(nip, 0);
 861                 hammer_abort_transaction(&trans);
 862                 *ap->a_vpp = NULL;
 863         } else {
 864                 hammer_commit_transaction(&trans);
 865                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 866                 hammer_rel_inode(nip, 0);
 867                 if (error == 0) {
 868                         cache_setunresolved(ap->a_nch);
 869                         cache_setvp(ap->a_nch, *ap->a_vpp);
 870                 }
 871         }
 872         return (error);
 873 }
 874
 875 /*
 876  * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
 877  *
 878  * The operating system has already ensured that the directory entry
 879  * does not exist and done all appropriate namespace locking.
 880  */
 881 static
 882 int
 883 hammer_vop_nmknod(struct vop_nmknod_args *ap)
 884 {
 885         struct hammer_transaction trans;
 886         struct hammer_inode *dip;
 887         struct hammer_inode *nip;
 888         struct nchandle *nch;
 889         int error;
 890
 891         nch = ap->a_nch;
 892         dip = VTOI(ap->a_dvp);
 893
 894         if (dip->flags & HAMMER_INODE_RO)
 895                 return (EROFS);
 896
 897         /*
 898          * Create a transaction to cover the operations we perform.
 899          */
 900         hammer_start_transaction(&trans, dip->hmp);
 901
 902         /*
 903          * Create a new filesystem object of the requested type.  The
 904          * returned inode will be referenced but not locked.
 905          */
 906         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 907         if (error) {
 908                 hammer_abort_transaction(&trans);
 909                 *ap->a_vpp = NULL;
 910                 return (error);
 911         }
 912
 913         /*
 914          * Add the new filesystem object to the directory.  This will also
 915          * bump the inode's link count.
 916          */
 917         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 918
 919         /*
 920          * Finish up.
 921          */
 922         if (error) {
 923                 hammer_rel_inode(nip, 0);
 924                 hammer_abort_transaction(&trans);
 925                 *ap->a_vpp = NULL;
 926         } else {
 927                 hammer_commit_transaction(&trans);
 928                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 929                 hammer_rel_inode(nip, 0);
 930                 if (error == 0) {
 931                         cache_setunresolved(ap->a_nch);
 932                         cache_setvp(ap->a_nch, *ap->a_vpp);
 933                 }
 934         }
 935         return (error);
 936 }
 937
 938 /*
 939  * hammer_vop_open { vp, mode, cred, fp }
 940  */
 941 static
 942 int
 943 hammer_vop_open(struct vop_open_args *ap)
 944 {
 945         if ((ap->a_mode & FWRITE) && (VTOI(ap->a_vp)->flags & HAMMER_INODE_RO))
 946                 return (EROFS);
 947
 948         return(vop_stdopen(ap));
 949 }
 950
 951 /*
 952  * hammer_vop_pathconf { vp, name, retval }
 953  */
 954 static
 955 int
 956 hammer_vop_pathconf(struct vop_pathconf_args *ap)
 957 {
 958         return EOPNOTSUPP;
 959 }
 960
 961 /*
 962  * hammer_vop_print { vp }
 963  */
 964 static
 965 int
 966 hammer_vop_print(struct vop_print_args *ap)
 967 {
 968         return EOPNOTSUPP;
 969 }
 970
 971 /*
 972  * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
 973  */
 974 static
 975 int
 976 hammer_vop_readdir(struct vop_readdir_args *ap)
 977 {
 978         struct hammer_cursor cursor;
 979         struct hammer_inode *ip;
 980         struct uio *uio;
 981         hammer_record_ondisk_t rec;
 982         hammer_base_elm_t base;
 983         int error;
 984         int cookie_index;
 985         int ncookies;
 986         off_t *cookies;
 987         off_t saveoff;
 988         int r;
 989
 990         ip = VTOI(ap->a_vp);
 991         uio = ap->a_uio;
 992         saveoff = uio->uio_offset;
 993
 994         if (ap->a_ncookies) {
 995                 ncookies = uio->uio_resid / 16 + 1;
 996                 if (ncookies > 1024)
 997                         ncookies = 1024;
 998                 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
 999                 cookie_index = 0;
1000         } else {
1001                 ncookies = -1;
1002                 cookies = NULL;
1003                 cookie_index = 0;
1004         }
1005
1006         /*
1007          * Handle artificial entries
1008          */
1009         error = 0;
1010         if (saveoff == 0) {
1011                 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1012                 if (r)
1013                         goto done;
1014                 if (cookies)
1015                         cookies[cookie_index] = saveoff;
1016                 ++saveoff;
1017                 ++cookie_index;
1018                 if (cookie_index == ncookies)
1019                         goto done;
1020         }
1021         if (saveoff == 1) {
1022                 if (ip->ino_data.parent_obj_id) {
1023                         r = vop_write_dirent(&error, uio,
1024                                              ip->ino_data.parent_obj_id,
1025                                              DT_DIR, 2, "..");
1026                 } else {
1027                         r = vop_write_dirent(&error, uio,
1028                                              ip->obj_id, DT_DIR, 2, "..");
1029                 }
1030                 if (r)
1031                         goto done;
1032                 if (cookies)
1033                         cookies[cookie_index] = saveoff;
1034                 ++saveoff;
1035                 ++cookie_index;
1036                 if (cookie_index == ncookies)
1037                         goto done;
1038         }
1039
1040         /*
1041          * Key range (begin and end inclusive) to scan.  Directory keys
1042          * directly translate to a 64 bit 'seek' position.
1043          */
1044         hammer_init_cursor_hmp(&cursor, &ip->cache[0], ip->hmp);
1045         cursor.key_beg.obj_id = ip->obj_id;
1046         cursor.key_beg.create_tid = 0;
1047         cursor.key_beg.delete_tid = 0;
1048         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1049         cursor.key_beg.obj_type = 0;
1050         cursor.key_beg.key = saveoff;
1051
1052         cursor.key_end = cursor.key_beg;
1053         cursor.key_end.key = HAMMER_MAX_KEY;
1054         cursor.asof = ip->obj_asof;
1055         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1056
1057         error = hammer_ip_first(&cursor, ip);
1058
1059         while (error == 0) {
1060                 error = hammer_ip_resolve_record_and_data(&cursor);
1061                 if (error)
1062                         break;
1063                 rec = cursor.record;
1064                 base = &rec->base.base;
1065                 saveoff = base->key;
1066
1067                 if (base->obj_id != ip->obj_id)
1068                         panic("readdir: bad record at %p", cursor.node);
1069
1070                 r = vop_write_dirent(
1071                              &error, uio, rec->entry.obj_id,
1072                              hammer_get_dtype(rec->entry.base.base.obj_type),
1073                              rec->entry.base.data_len,
1074                              (void *)cursor.data);
1075                 if (r)
1076                         break;
1077                 ++saveoff;
1078                 if (cookies)
1079                         cookies[cookie_index] = base->key;
1080                 ++cookie_index;
1081                 if (cookie_index == ncookies)
1082                         break;
1083                 error = hammer_ip_next(&cursor);
1084         }
1085         hammer_done_cursor(&cursor);
1086
1087 done:
1088         if (ap->a_eofflag)
1089                 *ap->a_eofflag = (error == ENOENT);
1090         uio->uio_offset = saveoff;
1091         if (error && cookie_index == 0) {
1092                 if (error == ENOENT)
1093                         error = 0;
1094                 if (cookies) {
1095                         kfree(cookies, M_TEMP);
1096                         *ap->a_ncookies = 0;
1097                         *ap->a_cookies = NULL;
1098                 }
1099         } else {
1100                 if (error == ENOENT)
1101                         error = 0;
1102                 if (cookies) {
1103                         *ap->a_ncookies = cookie_index;
1104                         *ap->a_cookies = cookies;
1105                 }
1106         }
1107         return(error);
1108 }
1109
1110 /*
1111  * hammer_vop_readlink { vp, uio, cred }
1112  */
1113 static
1114 int
1115 hammer_vop_readlink(struct vop_readlink_args *ap)
1116 {
1117         struct hammer_cursor cursor;
1118         struct hammer_inode *ip;
1119         int error;
1120
1121         ip = VTOI(ap->a_vp);
1122         hammer_init_cursor_hmp(&cursor, &ip->cache[0], ip->hmp);
1123
1124         /*
1125          * Key range (begin and end inclusive) to scan.  Directory keys
1126          * directly translate to a 64 bit 'seek' position.
1127          */
1128         cursor.key_beg.obj_id = ip->obj_id;
1129         cursor.key_beg.create_tid = 0;
1130         cursor.key_beg.delete_tid = 0;
1131         cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1132         cursor.key_beg.obj_type = 0;
1133         cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1134         cursor.asof = ip->obj_asof;
1135         cursor.flags |= HAMMER_CURSOR_ASOF;
1136
1137         error = hammer_ip_lookup(&cursor, ip);
1138         if (error == 0) {
1139                 error = hammer_ip_resolve_data(&cursor);
1140                 if (error == 0) {
1141                         error = uiomove((char *)cursor.data,
1142                                         cursor.record->base.data_len,
1143                                         ap->a_uio);
1144                 }
1145         }
1146         hammer_done_cursor(&cursor);
1147         return(error);
1148 }
1149
1150 /*
1151  * hammer_vop_nremove { nch, dvp, cred }
1152  */
1153 static
1154 int
1155 hammer_vop_nremove(struct vop_nremove_args *ap)
1156 {
1157         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
1158 }
1159
1160 /*
1161  * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1162  */
1163 static
1164 int
1165 hammer_vop_nrename(struct vop_nrename_args *ap)
1166 {
1167         struct hammer_transaction trans;
1168         struct namecache *fncp;
1169         struct namecache *tncp;
1170         struct hammer_inode *fdip;
1171         struct hammer_inode *tdip;
1172         struct hammer_inode *ip;
1173         struct hammer_cursor cursor;
1174         union hammer_record_ondisk *rec;
1175         int64_t namekey;
1176         int error;
1177
1178         fdip = VTOI(ap->a_fdvp);
1179         tdip = VTOI(ap->a_tdvp);
1180         fncp = ap->a_fnch->ncp;
1181         tncp = ap->a_tnch->ncp;
1182         ip = VTOI(fncp->nc_vp);
1183         KKASSERT(ip != NULL);
1184
1185         if (fdip->flags & HAMMER_INODE_RO)
1186                 return (EROFS);
1187         if (tdip->flags & HAMMER_INODE_RO)
1188                 return (EROFS);
1189         if (ip->flags & HAMMER_INODE_RO)
1190                 return (EROFS);
1191
1192         hammer_start_transaction(&trans, fdip->hmp);
1193
1194         /*
1195          * Remove tncp from the target directory and then link ip as
1196          * tncp. XXX pass trans to dounlink
1197          *
1198          * Force the inode sync-time to match the transaction so it is
1199          * in-sync with the creation of the target directory entry.
1200          */
1201         error = hammer_dounlink(ap->a_tnch, ap->a_tdvp, ap->a_cred, 0);
1202         if (error == 0 || error == ENOENT) {
1203                 error = hammer_ip_add_directory(&trans, tdip, tncp, ip);
1204                 if (error == 0) {
1205                         ip->ino_data.parent_obj_id = tdip->obj_id;
1206                         hammer_modify_inode(&trans, ip,
1207                                 HAMMER_INODE_DDIRTY | HAMMER_INODE_TIDLOCKED);
1208                 }
1209         }
1210         if (error)
1211                 goto failed; /* XXX */
1212
1213         /*
1214          * Locate the record in the originating directory and remove it.
1215          *
1216          * Calculate the namekey and setup the key range for the scan.  This
1217          * works kinda like a chained hash table where the lower 32 bits
1218          * of the namekey synthesize the chain.
1219          *
1220          * The key range is inclusive of both key_beg and key_end.
1221          */
1222         namekey = hammer_directory_namekey(fncp->nc_name, fncp->nc_nlen);
1223 retry:
1224         hammer_init_cursor_hmp(&cursor, &fdip->cache[0], fdip->hmp);
1225         cursor.key_beg.obj_id = fdip->obj_id;
1226         cursor.key_beg.key = namekey;
1227         cursor.key_beg.create_tid = 0;
1228         cursor.key_beg.delete_tid = 0;
1229         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1230         cursor.key_beg.obj_type = 0;
1231
1232         cursor.key_end = cursor.key_beg;
1233         cursor.key_end.key |= 0xFFFFFFFFULL;
1234         cursor.asof = fdip->obj_asof;
1235         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1236
1237         /*
1238          * Scan all matching records (the chain), locate the one matching
1239          * the requested path component.
1240          *
1241          * The hammer_ip_*() functions merge in-memory records with on-disk
1242          * records for the purposes of the search.
1243          */
1244         error = hammer_ip_first(&cursor, fdip);
1245         while (error == 0) {
1246                 if (hammer_ip_resolve_data(&cursor) != 0)
1247                         break;
1248                 rec = cursor.record;
1249                 if (fncp->nc_nlen == rec->entry.base.data_len &&
1250                     bcmp(fncp->nc_name, cursor.data, fncp->nc_nlen) == 0) {
1251                         break;
1252                 }
1253                 error = hammer_ip_next(&cursor);
1254         }
1255
1256         /*
1257          * If all is ok we have to get the inode so we can adjust nlinks.
1258          *
1259          * WARNING: hammer_ip_del_directory() may have to terminate the
1260          * cursor to avoid a recursion.  It's ok to call hammer_done_cursor()
1261          * twice.
1262          */
1263         if (error == 0)
1264                 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
1265         hammer_done_cursor(&cursor);
1266         if (error == 0)
1267                 cache_rename(ap->a_fnch, ap->a_tnch);
1268         if (error == EDEADLK)
1269                 goto retry;
1270 failed:
1271         if (error == 0) {
1272                 hammer_commit_transaction(&trans);
1273         } else {
1274                 hammer_abort_transaction(&trans);
1275         }
1276         return (error);
1277 }
1278
1279 /*
1280  * hammer_vop_nrmdir { nch, dvp, cred }
1281  */
1282 static
1283 int
1284 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
1285 {
1286         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
1287 }
1288
1289 /*
1290  * hammer_vop_setattr { vp, vap, cred }
1291  */
1292 static
1293 int
1294 hammer_vop_setattr(struct vop_setattr_args *ap)
1295 {
1296         struct hammer_transaction trans;
1297         struct vattr *vap;
1298         struct hammer_inode *ip;
1299         int modflags;
1300         int error;
1301         int truncating;
1302         int64_t aligned_size;
1303         u_int32_t flags;
1304         uuid_t uuid;
1305
1306         vap = ap->a_vap;
1307         ip = ap->a_vp->v_data;
1308         modflags = 0;
1309
1310         if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1311                 return(EROFS);
1312         if (ip->flags & HAMMER_INODE_RO)
1313                 return (EROFS);
1314
1315         hammer_start_transaction(&trans, ip->hmp);
1316         error = 0;
1317
1318         if (vap->va_flags != VNOVAL) {
1319                 flags = ip->ino_data.uflags;
1320                 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1321                                          hammer_to_unix_xid(&ip->ino_data.uid),
1322                                          ap->a_cred);
1323                 if (error == 0) {
1324                         if (ip->ino_data.uflags != flags) {
1325                                 ip->ino_data.uflags = flags;
1326                                 modflags |= HAMMER_INODE_DDIRTY;
1327                         }
1328                         if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1329                                 error = 0;
1330                                 goto done;
1331                         }
1332                 }
1333                 goto done;
1334         }
1335         if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1336                 error = EPERM;
1337                 goto done;
1338         }
1339         if (vap->va_uid != (uid_t)VNOVAL) {
1340                 hammer_guid_to_uuid(&uuid, vap->va_uid);
1341                 if (bcmp(&uuid, &ip->ino_data.uid, sizeof(uuid)) != 0) {
1342                         ip->ino_data.uid = uuid;
1343                         modflags |= HAMMER_INODE_DDIRTY;
1344                 }
1345         }
1346         if (vap->va_gid != (uid_t)VNOVAL) {
1347                 hammer_guid_to_uuid(&uuid, vap->va_gid);
1348                 if (bcmp(&uuid, &ip->ino_data.gid, sizeof(uuid)) != 0) {
1349                         ip->ino_data.gid = uuid;
1350                         modflags |= HAMMER_INODE_DDIRTY;
1351                 }
1352         }
1353         while (vap->va_size != VNOVAL && ip->ino_rec.ino_size != vap->va_size) {
1354                 switch(ap->a_vp->v_type) {
1355                 case VREG:
1356                         if (vap->va_size == ip->ino_rec.ino_size)
1357                                 break;
1358                         if (vap->va_size < ip->ino_rec.ino_size) {
1359                                 vtruncbuf(ap->a_vp, vap->va_size,
1360                                           HAMMER_BUFSIZE);
1361                                 truncating = 1;
1362                         } else {
1363                                 vnode_pager_setsize(ap->a_vp, vap->va_size);
1364                                 truncating = 0;
1365                         }
1366                         ip->ino_rec.ino_size = vap->va_size;
1367                         modflags |= HAMMER_INODE_RDIRTY;
1368                         aligned_size = (vap->va_size + HAMMER_BUFMASK) &
1369                                         ~(int64_t)HAMMER_BUFMASK;
1370
1371                         if (truncating) {
1372                                 error = hammer_ip_delete_range(&trans, ip,
1373                                                     aligned_size,
1374                                                     0x7FFFFFFFFFFFFFFFLL);
1375                         }
1376                         /*
1377                          * If truncating we have to clean out a portion of
1378                          * the last block on-disk.
1379                          */
1380                         if (truncating && error == 0 &&
1381                             vap->va_size < aligned_size) {
1382                                 struct buf *bp;
1383                                 int offset;
1384
1385                                 offset = vap->va_size & HAMMER_BUFMASK;
1386                                 error = bread(ap->a_vp,
1387                                               aligned_size - HAMMER_BUFSIZE,
1388                                               HAMMER_BUFSIZE, &bp);
1389                                 if (error == 0) {
1390                                         bzero(bp->b_data + offset,
1391                                               HAMMER_BUFSIZE - offset);
1392                                         bdwrite(bp);
1393                                 } else {
1394                                         brelse(bp);
1395                                 }
1396                         }
1397                         break;
1398                 case VDATABASE:
1399                         error = hammer_ip_delete_range(&trans, ip,
1400                                                     vap->va_size,
1401                                                     0x7FFFFFFFFFFFFFFFLL);
1402                         ip->ino_rec.ino_size = vap->va_size;
1403                         modflags |= HAMMER_INODE_RDIRTY;
1404                         break;
1405                 default:
1406                         error = EINVAL;
1407                         goto done;
1408                 }
1409                 break;
1410         }
1411         if (vap->va_atime.tv_sec != VNOVAL) {
1412                 ip->ino_rec.ino_atime =
1413                         hammer_timespec_to_transid(&vap->va_atime);
1414                 modflags |= HAMMER_INODE_ITIMES;
1415         }
1416         if (vap->va_mtime.tv_sec != VNOVAL) {
1417                 ip->ino_rec.ino_mtime =
1418                         hammer_timespec_to_transid(&vap->va_mtime);
1419                 modflags |= HAMMER_INODE_ITIMES;
1420         }
1421         if (vap->va_mode != (mode_t)VNOVAL) {
1422                 if (ip->ino_data.mode != vap->va_mode) {
1423                         ip->ino_data.mode = vap->va_mode;
1424                         modflags |= HAMMER_INODE_DDIRTY;
1425                 }
1426         }
1427 done:
1428         if (error) {
1429                 hammer_abort_transaction(&trans);
1430         } else {
1431                 hammer_modify_inode(&trans, ip, modflags);
1432                 hammer_commit_transaction(&trans);
1433         }
1434         return (error);
1435 }
1436
1437 /*
1438  * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1439  */
1440 static
1441 int
1442 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
1443 {
1444         struct hammer_transaction trans;
1445         struct hammer_inode *dip;
1446         struct hammer_inode *nip;
1447         struct nchandle *nch;
1448         hammer_record_t record;
1449         int error;
1450         int bytes;
1451
1452         ap->a_vap->va_type = VLNK;
1453
1454         nch = ap->a_nch;
1455         dip = VTOI(ap->a_dvp);
1456
1457         if (dip->flags & HAMMER_INODE_RO)
1458                 return (EROFS);
1459
1460         /*
1461          * Create a transaction to cover the operations we perform.
1462          */
1463         hammer_start_transaction(&trans, dip->hmp);
1464
1465         /*
1466          * Create a new filesystem object of the requested type.  The
1467          * returned inode will be referenced but not locked.
1468          */
1469
1470         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
1471         if (error) {
1472                 hammer_abort_transaction(&trans);
1473                 *ap->a_vpp = NULL;
1474                 return (error);
1475         }
1476
1477         /*
1478          * Add the new filesystem object to the directory.  This will also
1479          * bump the inode's link count.
1480          */
1481         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
1482
1483         /*
1484          * Add a record representing the symlink.  symlink stores the link
1485          * as pure data, not a string, and is no \0 terminated.
1486          */
1487         if (error == 0) {
1488                 record = hammer_alloc_mem_record(nip);
1489                 bytes = strlen(ap->a_target);
1490
1491                 record->rec.base.base.key = HAMMER_FIXKEY_SYMLINK;
1492                 record->rec.base.base.rec_type = HAMMER_RECTYPE_FIX;
1493                 record->rec.base.data_len = bytes;
1494                 record->data = (void *)ap->a_target;
1495                 /* will be reallocated by routine below */
1496                 error = hammer_ip_add_record(&trans, record);
1497
1498                 /*
1499                  * Set the file size to the length of the link.
1500                  */
1501                 if (error == 0) {
1502                         nip->ino_rec.ino_size = bytes;
1503                         hammer_modify_inode(&trans, nip, HAMMER_INODE_RDIRTY);
1504                 }
1505         }
1506
1507         /*
1508          * Finish up.
1509          */
1510         if (error) {
1511                 hammer_rel_inode(nip, 0);
1512                 hammer_abort_transaction(&trans);
1513                 *ap->a_vpp = NULL;
1514         } else {
1515                 hammer_commit_transaction(&trans);
1516                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
1517                 hammer_rel_inode(nip, 0);
1518                 if (error == 0) {
1519                         cache_setunresolved(ap->a_nch);
1520                         cache_setvp(ap->a_nch, *ap->a_vpp);
1521                 }
1522         }
1523         return (error);
1524 }
1525
1526 /*
1527  * hammer_vop_nwhiteout { nch, dvp, cred, flags }
1528  */
1529 static
1530 int
1531 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
1532 {
1533         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, ap->a_flags));
1534 }
1535
1536 /*
1537  * hammer_vop_ioctl { vp, command, data, fflag, cred }
1538  */
1539 static
1540 int
1541 hammer_vop_ioctl(struct vop_ioctl_args *ap)
1542 {
1543         struct hammer_inode *ip = ap->a_vp->v_data;
1544
1545         return(hammer_ioctl(ip, ap->a_command, ap->a_data,
1546                             ap->a_fflag, ap->a_cred));
1547 }
1548
1549 static
1550 int
1551 hammer_vop_mountctl(struct vop_mountctl_args *ap)
1552 {
1553         struct mount *mp;
1554         int error;
1555
1556         mp = ap->a_head.a_ops->head.vv_mount;
1557
1558         switch(ap->a_op) {
1559         case MOUNTCTL_SET_EXPORT:
1560                 if (ap->a_ctllen != sizeof(struct export_args))
1561                         error = EINVAL;
1562                 error = hammer_vfs_export(mp, ap->a_op,
1563                                       (const struct export_args *)ap->a_ctl);
1564                 break;
1565         default:
1566                 error = journal_mountctl(ap);
1567                 break;
1568         }
1569         return(error);
1570 }
1571
1572 /*
1573  * hammer_vop_strategy { vp, bio }
1574  *
1575  * Strategy call, used for regular file read & write only.  Note that the
1576  * bp may represent a cluster.
1577  *
1578  * To simplify operation and allow better optimizations in the future,
1579  * this code does not make any assumptions with regards to buffer alignment
1580  * or size.
1581  */
1582 static
1583 int
1584 hammer_vop_strategy(struct vop_strategy_args *ap)
1585 {
1586         struct buf *bp;
1587         int error;
1588
1589         bp = ap->a_bio->bio_buf;
1590
1591         switch(bp->b_cmd) {
1592         case BUF_CMD_READ:
1593                 error = hammer_vop_strategy_read(ap);
1594                 break;
1595         case BUF_CMD_WRITE:
1596                 error = hammer_vop_strategy_write(ap);
1597                 break;
1598         default:
1599                 error = EINVAL;
1600                 break;
1601         }
1602         bp->b_error = error;
1603         if (error)
1604                 bp->b_flags |= B_ERROR;
1605         biodone(ap->a_bio);
1606         return (error);
1607 }
1608
1609 /*
1610  * Read from a regular file.  Iterate the related records and fill in the
1611  * BIO/BUF.  Gaps are zero-filled.
1612  *
1613  * The support code in hammer_object.c should be used to deal with mixed
1614  * in-memory and on-disk records.
1615  *
1616  * XXX atime update
1617  */
1618 static
1619 int
1620 hammer_vop_strategy_read(struct vop_strategy_args *ap)
1621 {
1622         struct hammer_inode *ip = ap->a_vp->v_data;
1623         struct hammer_cursor cursor;
1624         hammer_record_ondisk_t rec;
1625         hammer_base_elm_t base;
1626         struct bio *bio;
1627         struct buf *bp;
1628         int64_t rec_offset;
1629         int64_t ran_end;
1630         int64_t tmp64;
1631         int error;
1632         int boff;
1633         int roff;
1634         int n;
1635
1636         bio = ap->a_bio;
1637         bp = bio->bio_buf;
1638
1639         hammer_init_cursor_hmp(&cursor, &ip->cache[0], ip->hmp);
1640
1641         /*
1642          * Key range (begin and end inclusive) to scan.  Note that the key's
1643          * stored in the actual records represent BASE+LEN, not BASE.  The
1644          * first record containing bio_offset will have a key > bio_offset.
1645          */
1646         cursor.key_beg.obj_id = ip->obj_id;
1647         cursor.key_beg.create_tid = 0;
1648         cursor.key_beg.delete_tid = 0;
1649         cursor.key_beg.obj_type = 0;
1650         cursor.key_beg.key = bio->bio_offset + 1;
1651         cursor.asof = ip->obj_asof;
1652         cursor.flags |= HAMMER_CURSOR_ASOF | HAMMER_CURSOR_DATAEXTOK;
1653
1654         cursor.key_end = cursor.key_beg;
1655         if (ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1656                 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
1657                 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
1658                 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1659         } else {
1660                 ran_end = bio->bio_offset + bp->b_bufsize;
1661                 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
1662                 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
1663                 tmp64 = ran_end + MAXPHYS + 1;  /* work-around GCC-4 bug */
1664                 if (tmp64 < ran_end)
1665                         cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1666                 else
1667                         cursor.key_end.key = ran_end + MAXPHYS + 1;
1668         }
1669         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
1670
1671         error = hammer_ip_first(&cursor, ip);
1672         boff = 0;
1673
1674         while (error == 0) {
1675                 error = hammer_ip_resolve_data(&cursor);
1676                 if (error)
1677                         break;
1678                 rec = cursor.record;
1679                 base = &rec->base.base;
1680
1681                 rec_offset = base->key - rec->data.base.data_len;
1682
1683                 /*
1684                  * Calculate the gap, if any, and zero-fill it.
1685                  */
1686                 n = (int)(rec_offset - (bio->bio_offset + boff));
1687                 if (n > 0) {
1688                         if (n > bp->b_bufsize - boff)
1689                                 n = bp->b_bufsize - boff;
1690                         bzero((char *)bp->b_data + boff, n);
1691                         boff += n;
1692                         n = 0;
1693                 }
1694
1695                 /*
1696                  * Calculate the data offset in the record and the number
1697                  * of bytes we can copy.
1698                  *
1699                  * Note there is a degenerate case here where boff may
1700                  * already be at bp->b_bufsize.
1701                  */
1702                 roff = -n;
1703                 n = rec->data.base.data_len - roff;
1704                 KKASSERT(n > 0);
1705                 if (n > bp->b_bufsize - boff)
1706                         n = bp->b_bufsize - boff;
1707                 bcopy((char *)cursor.data + roff,
1708                       (char *)bp->b_data + boff, n);
1709                 boff += n;
1710                 if (boff == bp->b_bufsize)
1711                         break;
1712                 error = hammer_ip_next(&cursor);
1713         }
1714         hammer_done_cursor(&cursor);
1715
1716         /*
1717          * There may have been a gap after the last record
1718          */
1719         if (error == ENOENT)
1720                 error = 0;
1721         if (error == 0 && boff != bp->b_bufsize) {
1722                 KKASSERT(boff < bp->b_bufsize);
1723                 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
1724                 /* boff = bp->b_bufsize; */
1725         }
1726         bp->b_resid = 0;
1727         return(error);
1728 }
1729
1730 /*
1731  * Write to a regular file.  Iterate the related records and mark for
1732  * deletion.  If existing edge records (left and right side) overlap our
1733  * write they have to be marked deleted and new records created, usually
1734  * referencing a portion of the original data.  Then add a record to
1735  * represent the buffer.
1736  *
1737  * The support code in hammer_object.c should be used to deal with mixed
1738  * in-memory and on-disk records.
1739  */
1740 static
1741 int
1742 hammer_vop_strategy_write(struct vop_strategy_args *ap)
1743 {
1744         struct hammer_transaction trans;
1745         hammer_inode_t ip;
1746         struct bio *bio;
1747         struct buf *bp;
1748         int error;
1749
1750         bio = ap->a_bio;
1751         bp = bio->bio_buf;
1752         ip = ap->a_vp->v_data;
1753
1754         if (ip->flags & HAMMER_INODE_RO)
1755                 return (EROFS);
1756
1757         /*
1758          * Start a transaction using the TID stored with the bp.
1759          */
1760         KKASSERT(bp->b_tid != 0);
1761         hammer_start_transaction_tid(&trans, ip->hmp, bp->b_tid);
1762
1763         /*
1764          * Delete any records overlapping our range.  This function will
1765          * (eventually) properly truncate partial overlaps.
1766          */
1767         if (ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1768                 error = hammer_ip_delete_range(&trans, ip, bio->bio_offset,
1769                                                bio->bio_offset);
1770         } else {
1771                 error = hammer_ip_delete_range(&trans, ip, bio->bio_offset,
1772                                                bio->bio_offset +
1773                                                 bp->b_bufsize - 1);
1774         }
1775
1776         /*
1777          * Add a single record to cover the write
1778          */
1779         if (error == 0) {
1780                 error = hammer_ip_sync_data(&trans, ip, bio->bio_offset,
1781                                             bp->b_data, bp->b_bufsize);
1782         }
1783
1784         /*
1785          * If an error occured abort the transaction
1786          */
1787         if (error) {
1788                 /* XXX undo deletion */
1789                 hammer_abort_transaction(&trans);
1790                 bp->b_resid = bp->b_bufsize;
1791         } else {
1792                 hammer_commit_transaction(&trans);
1793                 bp->b_resid = 0;
1794                 bp->b_tid = 0;
1795         }
1796         return(error);
1797 }
1798
1799 /*
1800  * dounlink - disconnect a directory entry
1801  *
1802  * XXX whiteout support not really in yet
1803  */
1804 static int
1805 hammer_dounlink(struct nchandle *nch, struct vnode *dvp, struct ucred *cred,
1806                 int flags)
1807 {
1808         struct hammer_transaction trans;
1809         struct namecache *ncp;
1810         hammer_inode_t dip;
1811         hammer_inode_t ip;
1812         hammer_record_ondisk_t rec;
1813         struct hammer_cursor cursor;
1814         int64_t namekey;
1815         int error;
1816
1817         /*
1818          * Calculate the namekey and setup the key range for the scan.  This
1819          * works kinda like a chained hash table where the lower 32 bits
1820          * of the namekey synthesize the chain.
1821          *
1822          * The key range is inclusive of both key_beg and key_end.
1823          */
1824         dip = VTOI(dvp);
1825         ncp = nch->ncp;
1826
1827         if (dip->flags & HAMMER_INODE_RO)
1828                 return (EROFS);
1829
1830         hammer_start_transaction(&trans, dip->hmp);
1831
1832         namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
1833 retry:
1834         hammer_init_cursor_hmp(&cursor, &dip->cache[0], dip->hmp);
1835         cursor.key_beg.obj_id = dip->obj_id;
1836         cursor.key_beg.key = namekey;
1837         cursor.key_beg.create_tid = 0;
1838         cursor.key_beg.delete_tid = 0;
1839         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1840         cursor.key_beg.obj_type = 0;
1841
1842         cursor.key_end = cursor.key_beg;
1843         cursor.key_end.key |= 0xFFFFFFFFULL;
1844         cursor.asof = dip->obj_asof;
1845         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1846
1847         /*
1848          * Scan all matching records (the chain), locate the one matching
1849          * the requested path component.  info->last_error contains the
1850          * error code on search termination and could be 0, ENOENT, or
1851          * something else.
1852          *
1853          * The hammer_ip_*() functions merge in-memory records with on-disk
1854          * records for the purposes of the search.
1855          */
1856         error = hammer_ip_first(&cursor, dip);
1857         while (error == 0) {
1858                 error = hammer_ip_resolve_data(&cursor);
1859                 if (error)
1860                         break;
1861                 rec = cursor.record;
1862                 if (ncp->nc_nlen == rec->entry.base.data_len &&
1863                     bcmp(ncp->nc_name, cursor.data, ncp->nc_nlen) == 0) {
1864                         break;
1865                 }
1866                 error = hammer_ip_next(&cursor);
1867         }
1868
1869         /*
1870          * If all is ok we have to get the inode so we can adjust nlinks.
1871          *
1872          * If the target is a directory, it must be empty.
1873          */
1874         if (error == 0) {
1875                 ip = hammer_get_inode(dip->hmp, &dip->cache[1],
1876                                       rec->entry.obj_id,
1877                                       dip->hmp->asof, 0, &error);
1878                 if (error == ENOENT) {
1879                         kprintf("obj_id %016llx\n", rec->entry.obj_id);
1880                         Debugger("ENOENT unlinking object that should exist, cont to sync");
1881                         hammer_sync_hmp(dip->hmp, MNT_NOWAIT);
1882                         Debugger("ENOENT - sync done");
1883                 }
1884                 if (error == 0 && ip->ino_rec.base.base.obj_type ==
1885                                   HAMMER_OBJTYPE_DIRECTORY) {
1886                         error = hammer_ip_check_directory_empty(&trans, ip);
1887                 }
1888                 /*
1889                  * WARNING: hammer_ip_del_directory() may have to terminate
1890                  * the cursor to avoid a lock recursion.  It's ok to call
1891                  * hammer_done_cursor() twice.
1892                  */
1893                 if (error == 0)
1894                         error = hammer_ip_del_directory(&trans, &cursor, dip, ip);
1895                 if (error == 0) {
1896                         cache_setunresolved(nch);
1897                         cache_setvp(nch, NULL);
1898                         /* XXX locking */
1899                         if (ip->vp)
1900                                 cache_inval_vp(ip->vp, CINV_DESTROY);
1901                 }
1902                 hammer_rel_inode(ip, 0);
1903         }
1904         hammer_done_cursor(&cursor);
1905         if (error == EDEADLK)
1906                 goto retry;
1907
1908         if (error == 0)
1909                 hammer_commit_transaction(&trans);
1910         else
1911                 hammer_abort_transaction(&trans);
1912         return (error);
1913 }
1914
1915 /************************************************************************
1916  *                          FIFO AND SPECFS OPS                         *
1917  ************************************************************************
1918  *
1919  */
1920
1921 static int
1922 hammer_vop_fifoclose (struct vop_close_args *ap)
1923 {
1924         /* XXX update itimes */
1925         return (VOCALL(&fifo_vnode_vops, &ap->a_head));
1926 }
1927
1928 static int
1929 hammer_vop_fiforead (struct vop_read_args *ap)
1930 {
1931         int error;
1932
1933         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1934         /* XXX update access time */
1935         return (error);
1936 }
1937
1938 static int
1939 hammer_vop_fifowrite (struct vop_write_args *ap)
1940 {
1941         int error;
1942
1943         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1944         /* XXX update access time */
1945         return (error);
1946 }
1947
1948 static int
1949 hammer_vop_specclose (struct vop_close_args *ap)
1950 {
1951         /* XXX update itimes */
1952         return (VOCALL(&spec_vnode_vops, &ap->a_head));
1953 }
1954
1955 static int
1956 hammer_vop_specread (struct vop_read_args *ap)
1957 {
1958         /* XXX update access time */
1959         return (VOCALL(&spec_vnode_vops, &ap->a_head));
1960 }
1961
1962 static int
1963 hammer_vop_specwrite (struct vop_write_args *ap)
1964 {
1965         /* XXX update last change time */
1966         return (VOCALL(&spec_vnode_vops, &ap->a_head));
1967 }
1968