sys/vfs/hpfs/hpfs_vnops.c

   1 /*-
   2  * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/fs/hpfs/hpfs_vnops.c,v 1.2.2.2 2002/01/15 18:35:09 semenu Exp $
  27  * $DragonFly: src/sys/vfs/hpfs/hpfs_vnops.c,v 1.44 2007/08/21 17:26:48 dillon Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/proc.h>
  34 #include <sys/time.h>
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <sys/vnode.h>
  38 #include <sys/mount.h>
  39 #include <sys/namei.h>
  40 #include <sys/malloc.h>
  41 #include <sys/buf.h>
  42 #include <sys/dirent.h>
  43
  44 #include <machine/limits.h>
  45
  46 #include <vm/vm.h>
  47 #include <vm/vm_param.h>
  48 #if !defined(__DragonFly__)
  49 #include <vm/vm_prot.h>
  50 #endif
  51 #include <vm/vm_page.h>
  52 #include <vm/vm_object.h>
  53 #include <vm/vm_pager.h>
  54 #include <vm/vm_zone.h>
  55 #if defined(__DragonFly__)
  56 #include <vm/vnode_pager.h>
  57 #endif
  58 #include <vm/vm_extern.h>
  59 #include <sys/buf2.h>
  60
  61 #if !defined(__DragonFly__)
  62 #include <miscfs/specfs/specdev.h>
  63 #include <miscfs/genfs/genfs.h>
  64 #endif
  65
  66 #include <sys/unistd.h> /* for pathconf(2) constants */
  67
  68 #include "hpfs.h"
  69 #include "hpfsmount.h"
  70 #include "hpfs_subr.h"
  71 #include "hpfs_ioctl.h"
  72
  73 static int      hpfs_de_uiomove (int *, struct hpfsmount *,
  74                                  struct hpfsdirent *, struct uio *);
  75 static int      hpfs_ioctl (struct vop_ioctl_args *ap);
  76 static int      hpfs_read (struct vop_read_args *);
  77 static int      hpfs_write (struct vop_write_args *ap);
  78 static int      hpfs_getattr (struct vop_getattr_args *ap);
  79 static int      hpfs_setattr (struct vop_setattr_args *ap);
  80 static int      hpfs_inactive (struct vop_inactive_args *ap);
  81 static int      hpfs_print (struct vop_print_args *ap);
  82 static int      hpfs_reclaim (struct vop_reclaim_args *ap);
  83 static int      hpfs_strategy (struct vop_strategy_args *ap);
  84 static int      hpfs_access (struct vop_access_args *ap);
  85 static int      hpfs_readdir (struct vop_readdir_args *ap);
  86 static int      hpfs_lookup (struct vop_old_lookup_args *ap);
  87 static int      hpfs_create (struct vop_old_create_args *);
  88 static int      hpfs_remove (struct vop_old_remove_args *);
  89 static int      hpfs_bmap (struct vop_bmap_args *ap);
  90 #if defined(__DragonFly__)
  91 static int      hpfs_getpages (struct vop_getpages_args *ap);
  92 static int      hpfs_putpages (struct vop_putpages_args *);
  93 static int      hpfs_fsync (struct vop_fsync_args *ap);
  94 #endif
  95 static int      hpfs_pathconf (struct vop_pathconf_args *ap);
  96
  97 #if defined(__DragonFly__)
  98 int
  99 hpfs_getpages(struct vop_getpages_args *ap)
 100 {
 101         return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
 102                 ap->a_reqpage);
 103 }
 104
 105 int
 106 hpfs_putpages(struct vop_putpages_args *ap)
 107 {
 108         return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
 109                 ap->a_sync, ap->a_rtvals);
 110 }
 111
 112 /*
 113  * hpfs_fsync(struct vnode *a_vp, int a_waitfor)
 114  */
 115 static int
 116 hpfs_fsync(struct vop_fsync_args *ap)
 117 {
 118         struct vnode *vp = ap->a_vp;
 119
 120         /*
 121          * Flush all dirty buffers associated with a vnode.
 122          */
 123 #ifdef DIAGNOSTIC
 124 loop:
 125 #endif
 126         vfsync(vp, ap->a_waitfor, 0, NULL, NULL);
 127 #ifdef DIAGNOSTIC
 128         if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) {
 129                 vprint("hpfs_fsync: dirty", vp);
 130                 goto loop;
 131         }
 132 #endif
 133
 134         /*
 135          * Write out the on-disc version of the vnode.
 136          */
 137         return hpfs_update(VTOHP(vp));
 138 }
 139
 140 #endif
 141
 142 /*
 143  * hpfs_ioctl(struct vnode *a_vp, u_long a_command, caddr_t a_data,
 144  *            int a_fflag, struct ucred *a_cred)
 145  */
 146 static int
 147 hpfs_ioctl(struct vop_ioctl_args *ap)
 148 {
 149         struct vnode *vp = ap->a_vp;
 150         struct hpfsnode *hp = VTOHP(vp);
 151         int error;
 152
 153         kprintf("hpfs_ioctl(0x%x, 0x%lx, 0x%p, 0x%x): ",
 154                 hp->h_no, ap->a_command, ap->a_data, ap->a_fflag);
 155
 156         switch (ap->a_command) {
 157         case HPFSIOCGEANUM: {
 158                 u_long eanum;
 159                 u_long passed;
 160                 struct ea *eap;
 161
 162                 eanum = 0;
 163
 164                 if (hp->h_fn.fn_ealen > 0) {
 165                         eap = (struct ea *)&(hp->h_fn.fn_int);
 166                         passed = 0;
 167
 168                         while (passed < hp->h_fn.fn_ealen) {
 169
 170                                 kprintf("EAname: %s\n", EA_NAME(eap));
 171
 172                                 eanum++;
 173                                 passed += sizeof(struct ea) +
 174                                           eap->ea_namelen + 1 + eap->ea_vallen;
 175                                 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
 176                                                 passed);
 177                         }
 178                         error = 0;
 179                 } else {
 180                         error = ENOENT;
 181                 }
 182
 183                 kprintf("%lu eas\n", eanum);
 184
 185                 *(u_long *)ap->a_data = eanum;
 186
 187                 break;
 188         }
 189         case HPFSIOCGEASZ: {
 190                 u_long eanum;
 191                 u_long passed;
 192                 struct ea *eap;
 193
 194                 kprintf("EA%ld\n", *(u_long *)ap->a_data);
 195
 196                 eanum = 0;
 197                 if (hp->h_fn.fn_ealen > 0) {
 198                         eap = (struct ea *)&(hp->h_fn.fn_int);
 199                         passed = 0;
 200
 201                         error = ENOENT;
 202                         while (passed < hp->h_fn.fn_ealen) {
 203                                 kprintf("EAname: %s\n", EA_NAME(eap));
 204
 205                                 if (eanum == *(u_long *)ap->a_data) {
 206                                         *(u_long *)ap->a_data =
 207                                                 eap->ea_namelen + 1 +
 208                                                 eap->ea_vallen;
 209
 210                                         error = 0;
 211                                         break;
 212                                 }
 213
 214                                 eanum++;
 215                                 passed += sizeof(struct ea) +
 216                                           eap->ea_namelen + 1 + eap->ea_vallen;
 217                                 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
 218                                                 passed);
 219                         }
 220                 } else {
 221                         error = ENOENT;
 222                 }
 223
 224                 break;
 225         }
 226         case HPFSIOCRDEA: {
 227                 u_long eanum;
 228                 u_long passed;
 229                 struct hpfs_rdea *rdeap;
 230                 struct ea *eap;
 231
 232                 rdeap = (struct hpfs_rdea *)ap->a_data;
 233                 kprintf("EA%ld\n", rdeap->ea_no);
 234
 235                 eanum = 0;
 236                 if (hp->h_fn.fn_ealen > 0) {
 237                         eap = (struct ea *)&(hp->h_fn.fn_int);
 238                         passed = 0;
 239
 240                         error = ENOENT;
 241                         while (passed < hp->h_fn.fn_ealen) {
 242                                 kprintf("EAname: %s\n", EA_NAME(eap));
 243
 244                                 if (eanum == rdeap->ea_no) {
 245                                         rdeap->ea_sz = eap->ea_namelen + 1 +
 246                                                         eap->ea_vallen;
 247                                         copyout(EA_NAME(eap),rdeap->ea_data,
 248                                                 rdeap->ea_sz);
 249                                         error = 0;
 250                                         break;
 251                                 }
 252
 253                                 eanum++;
 254                                 passed += sizeof(struct ea) +
 255                                           eap->ea_namelen + 1 + eap->ea_vallen;
 256                                 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
 257                                                 passed);
 258                         }
 259                 } else {
 260                         error = ENOENT;
 261                 }
 262
 263                 break;
 264         }
 265         default:
 266                 error = EOPNOTSUPP;
 267                 break;
 268         }
 269         return (error);
 270 }
 271
 272 /*
 273  * Map file offset to disk offset.
 274  *
 275  * hpfs_bmap(struct vnode *a_vp, off_t a_loffset,
 276  *           off_t *a_doffsetp, int *a_runp, int *a_runb)
 277  */
 278 int
 279 hpfs_bmap(struct vop_bmap_args *ap)
 280 {
 281         struct hpfsnode *hp = VTOHP(ap->a_vp);
 282         int error;
 283         daddr_t lbn;
 284         daddr_t dbn;
 285
 286         if (ap->a_runb != NULL)
 287                 *ap->a_runb = 0;
 288         if (ap->a_doffsetp == NULL)
 289                 return (0);
 290
 291         dprintf(("hpfs_bmap(0x%x, 0x%x): ",hp->h_no, ap->a_bn));
 292
 293         lbn = ap->a_loffset >> DEV_BSHIFT;
 294         KKASSERT(((int)ap->a_loffset & DEV_BMASK) == 0);
 295
 296         error = hpfs_hpbmap (hp, lbn, &dbn, ap->a_runp);
 297         if (error || dbn == (daddr_t)-1) {
 298                 *ap->a_doffsetp = NOOFFSET;
 299         } else {
 300                 *ap->a_doffsetp = (off_t)dbn << DEV_BSHIFT;
 301         }
 302         return (error);
 303 }
 304
 305 /*
 306  * hpfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
 307  *           struct ucred *a_cred)
 308  */
 309 static int
 310 hpfs_read(struct vop_read_args *ap)
 311 {
 312         struct vnode *vp = ap->a_vp;
 313         struct hpfsnode *hp = VTOHP(vp);
 314         struct uio *uio = ap->a_uio;
 315         struct buf *bp;
 316         u_int xfersz, toread;
 317         u_int off;
 318         daddr_t lbn, bn;
 319         int resid;
 320         int runl;
 321         int error = 0;
 322
 323         resid = min (uio->uio_resid, hp->h_fn.fn_size - uio->uio_offset);
 324
 325         dprintf(("hpfs_read(0x%x, off: %d resid: %d, segflg: %d): [resid: 0x%x]\n",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg, resid));
 326
 327         while (resid) {
 328                 lbn = uio->uio_offset >> DEV_BSHIFT;
 329                 off = uio->uio_offset & (DEV_BSIZE - 1);
 330                 dprintf(("hpfs_read: resid: 0x%x lbn: 0x%x off: 0x%x\n",
 331                         uio->uio_resid, lbn, off));
 332                 error = hpfs_hpbmap(hp, lbn, &bn, &runl);
 333                 if (error)
 334                         return (error);
 335
 336                 toread = min(off + resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE));
 337                 xfersz = (toread + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
 338                 dprintf(("hpfs_read: bn: 0x%x (0x%x) toread: 0x%x (0x%x)\n",
 339                         bn, runl, toread, xfersz));
 340
 341                 if (toread == 0)
 342                         break;
 343
 344                 error = bread(hp->h_devvp, dbtodoff(bn), xfersz, &bp);
 345                 if (error) {
 346                         brelse(bp);
 347                         break;
 348                 }
 349
 350                 error = uiomove(bp->b_data + off, toread - off, uio);
 351                 if(error) {
 352                         brelse(bp);
 353                         break;
 354                 }
 355                 brelse(bp);
 356                 resid -= toread;
 357         }
 358         dprintf(("hpfs_read: successful\n"));
 359         return (error);
 360 }
 361
 362 /*
 363  * hpfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
 364  *            struct ucred *a_cred)
 365  */
 366 static int
 367 hpfs_write(struct vop_write_args *ap)
 368 {
 369         struct vnode *vp = ap->a_vp;
 370         struct hpfsnode *hp = VTOHP(vp);
 371         struct uio *uio = ap->a_uio;
 372         struct buf *bp;
 373         u_int xfersz, towrite;
 374         u_int off;
 375         daddr_t lbn, bn;
 376         int runl;
 377         int error = 0;
 378
 379         dprintf(("hpfs_write(0x%x, off: %d resid: %d, segflg: %d):\n",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
 380
 381         if (ap->a_ioflag & IO_APPEND) {
 382                 dprintf(("hpfs_write: APPEND mode\n"));
 383                 uio->uio_offset = hp->h_fn.fn_size;
 384         }
 385         if (uio->uio_offset + uio->uio_resid > hp->h_fn.fn_size) {
 386                 error = hpfs_extend (hp, uio->uio_offset + uio->uio_resid);
 387                 if (error) {
 388                         kprintf("hpfs_write: hpfs_extend FAILED %d\n", error);
 389                         return (error);
 390                 }
 391         }
 392
 393         while (uio->uio_resid) {
 394                 lbn = uio->uio_offset >> DEV_BSHIFT;
 395                 off = uio->uio_offset & (DEV_BSIZE - 1);
 396                 dprintf(("hpfs_write: resid: 0x%x lbn: 0x%x off: 0x%x\n",
 397                         uio->uio_resid, lbn, off));
 398                 error = hpfs_hpbmap(hp, lbn, &bn, &runl);
 399                 if (error)
 400                         return (error);
 401
 402                 towrite = min(off + uio->uio_resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE));
 403                 xfersz = (towrite + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
 404                 dprintf(("hpfs_write: bn: 0x%x (0x%x) towrite: 0x%x (0x%x)\n",
 405                         bn, runl, towrite, xfersz));
 406
 407                 /*
 408                  * We do not have to issue a read-before-write if the xfer
 409                  * size does not cover the whole block.
 410                  *
 411                  * In the UIO_NOCOPY case, however, we are not overwriting
 412                  * anything and must do a read-before-write to fill in
 413                  * any missing pieces.
 414                  */
 415                 if (off == 0 && towrite == xfersz &&
 416                     uio->uio_segflg != UIO_NOCOPY) {
 417                         bp = getblk(hp->h_devvp, dbtodoff(bn), xfersz, 0, 0);
 418                         clrbuf(bp);
 419                 } else {
 420                         error = bread(hp->h_devvp, dbtodoff(bn), xfersz, &bp);
 421                         if (error) {
 422                                 brelse(bp);
 423                                 return (error);
 424                         }
 425                 }
 426
 427                 error = uiomove(bp->b_data + off, towrite - off, uio);
 428                 if(error) {
 429                         brelse(bp);
 430                         return (error);
 431                 }
 432
 433                 if (ap->a_ioflag & IO_SYNC)
 434                         bwrite(bp);
 435                 else
 436                         bawrite(bp);
 437         }
 438
 439         dprintf(("hpfs_write: successful\n"));
 440         return (0);
 441 }
 442
 443 /*
 444  * XXXXX do we need hpfsnode locking inside?
 445  *
 446  * hpfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
 447  */
 448 static int
 449 hpfs_getattr(struct vop_getattr_args *ap)
 450 {
 451         struct vnode *vp = ap->a_vp;
 452         struct hpfsnode *hp = VTOHP(vp);
 453         struct vattr *vap = ap->a_vap;
 454         int error;
 455
 456         dprintf(("hpfs_getattr(0x%x):\n", hp->h_no));
 457
 458 #if defined(__DragonFly__)
 459         vap->va_fsid = dev2udev(hp->h_dev);
 460 #else /* defined(__NetBSD__) */
 461         vap->va_fsid = ip->i_dev;
 462 #endif
 463         vap->va_fileid = hp->h_no;
 464         vap->va_mode = hp->h_mode;
 465         vap->va_nlink = 1;
 466         vap->va_uid = hp->h_uid;
 467         vap->va_gid = hp->h_gid;
 468         vap->va_rmajor = VNOVAL;
 469         vap->va_rminor = VNOVAL;
 470         vap->va_size = hp->h_fn.fn_size;
 471         vap->va_bytes = ((hp->h_fn.fn_size + DEV_BSIZE-1) & ~(DEV_BSIZE-1)) +
 472                         DEV_BSIZE;
 473
 474         if (!(hp->h_flag & H_PARVALID)) {
 475                 error = hpfs_validateparent(hp);
 476                 if (error)
 477                         return (error);
 478         }
 479         vap->va_atime = hpfstimetounix(hp->h_atime);
 480         vap->va_mtime = hpfstimetounix(hp->h_mtime);
 481         vap->va_ctime = hpfstimetounix(hp->h_ctime);
 482
 483         vap->va_flags = 0;
 484         vap->va_gen = 0;
 485         vap->va_blocksize = DEV_BSIZE;
 486         vap->va_type = vp->v_type;
 487         vap->va_filerev = 0;
 488
 489         return (0);
 490 }
 491
 492 /*
 493  * XXXXX do we need hpfsnode locking inside?
 494  *
 495  * hpfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
 496  */
 497 static int
 498 hpfs_setattr(struct vop_setattr_args *ap)
 499 {
 500         struct vnode *vp = ap->a_vp;
 501         struct hpfsnode *hp = VTOHP(vp);
 502         struct vattr *vap = ap->a_vap;
 503         struct ucred *cred = ap->a_cred;
 504         int error;
 505
 506         dprintf(("hpfs_setattr(0x%x):\n", hp->h_no));
 507
 508         /*
 509          * Check for unsettable attributes.
 510          */
 511         if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
 512             (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
 513             (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) ||
 514             (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
 515                 dprintf(("hpfs_setattr: changing nonsettable attr\n"));
 516                 return (EINVAL);
 517         }
 518
 519         /* Can't change flags XXX Could be implemented */
 520         if (vap->va_flags != VNOVAL) {
 521                 kprintf("hpfs_setattr: FLAGS CANNOT BE SET\n");
 522                 return (EINVAL);
 523         }
 524
 525         /* Can't change uid/gid XXX Could be implemented */
 526         if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
 527                 kprintf("hpfs_setattr: UID/GID CANNOT BE SET\n");
 528                 return (EINVAL);
 529         }
 530
 531         /* Can't change mode XXX Could be implemented */
 532         if (vap->va_mode != (mode_t)VNOVAL) {
 533                 kprintf("hpfs_setattr: MODE CANNOT BE SET\n");
 534                 return (EINVAL);
 535         }
 536
 537         /* Update times */
 538         if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
 539                 if (vp->v_mount->mnt_flag & MNT_RDONLY)
 540                         return (EROFS);
 541                 if (cred->cr_uid != hp->h_uid &&
 542                     (error = suser_cred(cred, PRISON_ROOT)) &&
 543                     ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
 544                     (error = VOP_ACCESS(vp, VWRITE, cred))))
 545                         return (error);
 546                 if (vap->va_atime.tv_sec != VNOVAL)
 547                         hp->h_atime = vap->va_atime.tv_sec;
 548                 if (vap->va_mtime.tv_sec != VNOVAL)
 549                         hp->h_mtime = vap->va_mtime.tv_sec;
 550
 551                 hp->h_flag |= H_PARCHANGE;
 552         }
 553
 554         if (vap->va_size != VNOVAL) {
 555                 switch (vp->v_type) {
 556                 case VDIR:
 557                         return (EISDIR);
 558                 case VREG:
 559                         if (vp->v_mount->mnt_flag & MNT_RDONLY)
 560                                 return (EROFS);
 561                         break;
 562                 default:
 563                         kprintf("hpfs_setattr: WRONG v_type\n");
 564                         return (EINVAL);
 565                 }
 566
 567                 if (vap->va_size < hp->h_fn.fn_size) {
 568 #if defined(__DragonFly__)
 569                         error = vtruncbuf(vp, vap->va_size, DEV_BSIZE);
 570                         if (error)
 571                                 return (error);
 572 #else /* defined(__NetBSD__) */
 573 #error Need alternation for vtruncbuf()
 574 #endif
 575                         error = hpfs_truncate(hp, vap->va_size);
 576                         if (error)
 577                                 return (error);
 578
 579                 } else if (vap->va_size > hp->h_fn.fn_size) {
 580 #if defined(__DragonFly__)
 581                         vnode_pager_setsize(vp, vap->va_size);
 582 #endif
 583                         error = hpfs_extend(hp, vap->va_size);
 584                         if (error)
 585                                 return (error);
 586                 }
 587         }
 588
 589         return (0);
 590 }
 591
 592 /*
 593  * Last reference to an node.  If necessary, write or delete it.
 594  *
 595  * hpfs_inactive(struct vnode *a_vp)
 596  */
 597 int
 598 hpfs_inactive(struct vop_inactive_args *ap)
 599 {
 600         struct vnode *vp = ap->a_vp;
 601         struct hpfsnode *hp = VTOHP(vp);
 602         int error;
 603
 604         dprintf(("hpfs_inactive(0x%x): \n", hp->h_no));
 605
 606         if (hp->h_flag & H_CHANGE) {
 607                 dprintf(("hpfs_inactive: node changed, update\n"));
 608                 error = hpfs_update (hp);
 609                 if (error)
 610                         return (error);
 611         }
 612
 613         if (hp->h_flag & H_PARCHANGE) {
 614                 dprintf(("hpfs_inactive: parent node changed, update\n"));
 615                 error = hpfs_updateparent (hp);
 616                 if (error)
 617                         return (error);
 618         }
 619
 620         if (prtactive && vp->v_sysref.refcnt > 1)
 621                 vprint("hpfs_inactive: pushing active", vp);
 622
 623         if (hp->h_flag & H_INVAL) {
 624 #if defined(__DragonFly__)
 625                 vrecycle(vp);
 626 #else /* defined(__NetBSD__) */
 627                 vgone(vp);
 628 #endif
 629                 return (0);
 630         }
 631         return (0);
 632 }
 633
 634 /*
 635  * Reclaim an inode so that it can be used for other purposes.
 636  *
 637  * hpfs_reclaim(struct vnode *a_vp)
 638  */
 639 int
 640 hpfs_reclaim(struct vop_reclaim_args *ap)
 641 {
 642         struct vnode *vp = ap->a_vp;
 643         struct hpfsnode *hp = VTOHP(vp);
 644
 645         dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no));
 646
 647         hpfs_hphashrem(hp);
 648
 649         /* Purge old data structures associated with the inode. */
 650         if (hp->h_devvp) {
 651                 vrele(hp->h_devvp);
 652                 hp->h_devvp = NULL;
 653         }
 654
 655         vp->v_data = NULL;
 656
 657         FREE(hp, M_HPFSNO);
 658
 659         return (0);
 660 }
 661
 662 /*
 663  * hpfs_print(struct vnode *a_vp)
 664  */
 665 static int
 666 hpfs_print(struct vop_print_args *ap)
 667 {
 668         struct vnode *vp = ap->a_vp;
 669         struct hpfsnode *hp = VTOHP(vp);
 670
 671         kprintf("tag VT_HPFS, ino 0x%x",hp->h_no);
 672         lockmgr_printinfo(&vp->v_lock);
 673         kprintf("\n");
 674         return (0);
 675 }
 676
 677 /*
 678  * Calculate the logical to physical mapping if not done already,
 679  * then call the device strategy routine.
 680  *
 681  * In order to be able to swap to a file, the VOP_BMAP operation may not
 682  * deadlock on memory.  See hpfs_bmap() for details. XXXXXXX (not impl)
 683  *
 684  * hpfs_strategy(struct vnode *a_vp, struct bio *a_bio)
 685  */
 686 int
 687 hpfs_strategy(struct vop_strategy_args *ap)
 688 {
 689         struct bio *bio = ap->a_bio;
 690         struct bio *nbio;
 691         struct buf *bp = bio->bio_buf;
 692         struct vnode *vp = ap->a_vp;
 693         struct hpfsnode *hp;
 694         int error;
 695
 696         dprintf(("hpfs_strategy(): \n"));
 697
 698         if (vp->v_type == VBLK || vp->v_type == VCHR)
 699                 panic("hpfs_strategy: spec");
 700
 701         nbio = push_bio(bio);
 702         if (nbio->bio_offset == NOOFFSET) {
 703                 error = VOP_BMAP(vp, bio->bio_offset, &nbio->bio_offset,
 704                                  NULL, NULL);
 705                 if (error) {
 706                         kprintf("hpfs_strategy: VOP_BMAP FAILED %d\n", error);
 707                         bp->b_error = error;
 708                         bp->b_flags |= B_ERROR;
 709                         /* I/O was never started on nbio, must biodone(bio) */
 710                         biodone(bio);
 711                         return (error);
 712                 }
 713                 if (nbio->bio_offset == NOOFFSET)
 714                         vfs_bio_clrbuf(bp);
 715         }
 716         if (nbio->bio_offset == NOOFFSET) {
 717                 /* I/O was never started on nbio, must biodone(bio) */
 718                 biodone(bio);
 719                 return (0);
 720         }
 721         hp = VTOHP(ap->a_vp);
 722         vn_strategy(hp->h_devvp, nbio);
 723         return (0);
 724 }
 725
 726 /*
 727  * XXXXX do we need hpfsnode locking inside?
 728  *
 729  * hpfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
 730  */
 731 int
 732 hpfs_access(struct vop_access_args *ap)
 733 {
 734         struct vnode *vp = ap->a_vp;
 735         struct hpfsnode *hp = VTOHP(vp);
 736         struct ucred *cred = ap->a_cred;
 737         mode_t mask, mode = ap->a_mode;
 738         gid_t *gp;
 739         int i;
 740
 741         dprintf(("hpfs_access(0x%x):\n", hp->h_no));
 742
 743         /*
 744          * Disallow write attempts on read-only file systems;
 745          * unless the file is a socket, fifo, or a block or
 746          * character device resident on the file system.
 747          */
 748         if (mode & VWRITE) {
 749                 switch ((int)vp->v_type) {
 750                 case VDIR:
 751                 case VLNK:
 752                 case VREG:
 753                         if (vp->v_mount->mnt_flag & MNT_RDONLY)
 754                                 return (EROFS);
 755                         break;
 756                 }
 757         }
 758
 759         /* Otherwise, user id 0 always gets access. */
 760         if (cred->cr_uid == 0)
 761                 return (0);
 762
 763         mask = 0;
 764
 765         /* Otherwise, check the owner. */
 766         if (cred->cr_uid == hp->h_uid) {
 767                 if (mode & VEXEC)
 768                         mask |= S_IXUSR;
 769                 if (mode & VREAD)
 770                         mask |= S_IRUSR;
 771                 if (mode & VWRITE)
 772                         mask |= S_IWUSR;
 773                 return ((hp->h_mode & mask) == mask ? 0 : EACCES);
 774         }
 775
 776         /* Otherwise, check the groups. */
 777         for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
 778                 if (hp->h_gid == *gp) {
 779                         if (mode & VEXEC)
 780                                 mask |= S_IXGRP;
 781                         if (mode & VREAD)
 782                                 mask |= S_IRGRP;
 783                         if (mode & VWRITE)
 784                                 mask |= S_IWGRP;
 785                         return ((hp->h_mode & mask) == mask ? 0 : EACCES);
 786                 }
 787
 788         /* Otherwise, check everyone else. */
 789         if (mode & VEXEC)
 790                 mask |= S_IXOTH;
 791         if (mode & VREAD)
 792                 mask |= S_IROTH;
 793         if (mode & VWRITE)
 794                 mask |= S_IWOTH;
 795         return ((hp->h_mode & mask) == mask ? 0 : EACCES);
 796 }
 797
 798 static int
 799 hpfs_de_uiomove(int *error, struct hpfsmount *hpmp, struct hpfsdirent *dep,
 800                 struct uio *uio)
 801 {
 802         char convname[HPFS_MAXFILENAME + 1];
 803         int i, success;
 804
 805         dprintf(("[no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x] ",
 806                 dep->de_fnode, dep->de_size, dep->de_namelen,
 807                 dep->de_namelen, dep->de_name, dep->de_flag));
 808
 809         /*strncpy(cde.d_name, dep->de_name, dep->de_namelen);*/
 810         for (i=0; i<dep->de_namelen; i++)
 811                 convname[i] = hpfs_d2u(hpmp, dep->de_name[i]);
 812         convname[dep->de_namelen] = '\0';
 813
 814         success = vop_write_dirent(error, uio, dep->de_fnode,
 815                         (dep->de_flag & DE_DIR) ? DT_DIR : DT_REG,
 816                         dep->de_namelen, convname);
 817
 818         dprintf(("[0x%x] ", uio->uio_resid));
 819         return (success);
 820 }
 821
 822
 823 /*
 824  * hpfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
 825  *              int *a_ncookies, u_int **cookies)
 826  */
 827 int
 828 hpfs_readdir(struct vop_readdir_args *ap)
 829 {
 830         struct vnode *vp = ap->a_vp;
 831         struct hpfsnode *hp = VTOHP(vp);
 832         struct hpfsmount *hpmp = hp->h_hpmp;
 833         struct uio *uio = ap->a_uio;
 834         int ncookies = 0, i, num, cnum;
 835         int error = 0;
 836         struct buf *bp;
 837         struct dirblk *dp;
 838         struct hpfsdirent *dep;
 839         lsn_t olsn;
 840         lsn_t lsn;
 841         int level;
 842
 843         dprintf(("hpfs_readdir(0x%x, 0x%x, 0x%x): ",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid));
 844
 845         /*
 846          * As we need to fake up . and .., and the remaining directory structure
 847          * can't be expressed in one off_t as well, we just increment uio_offset
 848          * by 1 for each entry.
 849          *
 850          * num is the entry we need to start reporting
 851          * cnum is the current entry
 852          */
 853         if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX)
 854                 return(EINVAL);
 855         if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
 856                 return (error);
 857
 858         num = uio->uio_offset;
 859         cnum = 0;
 860
 861         if( num <= cnum ) {
 862                 dprintf((". faked, "));
 863                 if (vop_write_dirent(&error, uio, hp->h_no, DT_DIR, 1, "."))
 864                         goto done;
 865                 if (error)
 866                         goto done;
 867                 ncookies ++;
 868         }
 869         cnum++;
 870
 871         if( num <= cnum ) {
 872                 dprintf((".. faked, "));
 873                 if (vop_write_dirent(&error, uio, hp->h_fn.fn_parent, DT_DIR, 2, ".."))
 874                         goto readdone;
 875                 if (error)
 876                         goto done;
 877                 ncookies ++;
 878         }
 879         cnum++;
 880
 881         lsn = ((alleaf_t *)hp->h_fn.fn_abd)->al_lsn;
 882
 883         olsn = 0;
 884         level = 1;
 885
 886 dive:
 887         dprintf(("[dive 0x%x] ", lsn));
 888         error = bread(hp->h_devvp, dbtodoff(lsn), D_BSIZE, &bp);
 889         if (error) {
 890                 brelse(bp);
 891                 goto done;
 892         }
 893
 894         dp = (struct dirblk *) bp->b_data;
 895         if (dp->d_magic != D_MAGIC) {
 896                 kprintf("hpfs_readdir: MAGIC DOESN'T MATCH\n");
 897                 brelse(bp);
 898                 error = EINVAL;
 899                 goto done;
 900         }
 901
 902         dep = D_DIRENT(dp);
 903
 904         if (olsn) {
 905                 dprintf(("[restore 0x%x] ", olsn));
 906
 907                 while(!(dep->de_flag & DE_END) ) {
 908                         if((dep->de_flag & DE_DOWN) &&
 909                            (olsn == DE_DOWNLSN(dep)))
 910                                          break;
 911                         dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
 912                 }
 913
 914                 if((dep->de_flag & DE_DOWN) && (olsn == DE_DOWNLSN(dep))) {
 915                         if (dep->de_flag & DE_END)
 916                                 goto blockdone;
 917
 918                         if (!(dep->de_flag & DE_SPECIAL)) {
 919                                 if (num <= cnum) {
 920                                         if (hpfs_de_uiomove(&error, hpmp, dep, uio)) {
 921                                                 brelse(bp);
 922                                                 dprintf(("[resid] "));
 923                                                 goto readdone;
 924                                         }
 925                                         if (error) {
 926                                                 brelse (bp);
 927                                                 goto done;
 928                                         }
 929                                         ncookies++;
 930                                 }
 931                                 cnum++;
 932                         }
 933
 934                         dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
 935                 } else {
 936                         kprintf("hpfs_readdir: ERROR! oLSN not found\n");
 937                         brelse(bp);
 938                         error = EINVAL;
 939                         goto done;
 940                 }
 941         }
 942
 943         olsn = 0;
 944
 945         while(!(dep->de_flag & DE_END)) {
 946                 if(dep->de_flag & DE_DOWN) {
 947                         lsn = DE_DOWNLSN(dep);
 948                         brelse(bp);
 949                         level++;
 950                         goto dive;
 951                 }
 952
 953                 if (!(dep->de_flag & DE_SPECIAL)) {
 954                         if (num <= cnum) {
 955                                 if (hpfs_de_uiomove(&error, hpmp, dep, uio)) {
 956                                         brelse(bp);
 957                                         dprintf(("[resid] "));
 958                                         goto readdone;
 959                                 }
 960                                 if (error) {
 961                                         brelse (bp);
 962                                         goto done;
 963                                 }
 964                                 ncookies++;
 965                         }
 966                         cnum++;
 967                 }
 968
 969                 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
 970         }
 971
 972         if(dep->de_flag & DE_DOWN) {
 973                 dprintf(("[enddive] "));
 974                 lsn = DE_DOWNLSN(dep);
 975                 brelse(bp);
 976                 level++;
 977                 goto dive;
 978         }
 979
 980 blockdone:
 981         dprintf(("[EOB] "));
 982         olsn = lsn;
 983         lsn = dp->d_parent;
 984         brelse(bp);
 985         level--;
 986
 987         dprintf(("[level %d] ", level));
 988
 989         if (level > 0)
 990                 goto dive;      /* undive really */
 991
 992         if (ap->a_eofflag) {
 993             dprintf(("[EOF] "));
 994             *ap->a_eofflag = 1;
 995         }
 996
 997 readdone:
 998         uio->uio_offset = cnum;
 999         dprintf(("[readdone]\n"));
1000         if (!error && ap->a_ncookies != NULL) {
1001 #if defined(__DragonFly__)
1002                 u_long *cookies;
1003                 u_long *cookiep;
1004 #else /* defined(__NetBSD__) */
1005                 off_t *cookies;
1006                 off_t *cookiep;
1007 #endif
1008
1009                 dprintf(("%d cookies, ",ncookies));
1010                 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
1011                         panic("hpfs_readdir: unexpected uio from NFS server");
1012 #if defined(__DragonFly__)
1013                 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
1014                        M_TEMP, M_WAITOK);
1015 #else /* defined(__NetBSD__) */
1016                 MALLOC(cookies, off_t *, ncookies * sizeof(off_t),
1017                        M_TEMP, M_WAITOK);
1018 #endif
1019                 for (cookiep = cookies, i=0; i < ncookies; i++)
1020                         *cookiep++ = (u_int)++num;
1021
1022                 *ap->a_ncookies = ncookies;
1023                 *ap->a_cookies = cookies;
1024         }
1025
1026 done:
1027         vn_unlock(ap->a_vp);
1028         return (error);
1029 }
1030
1031 /*
1032  * hpfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
1033  *              struct componentname *a_cnp)
1034  */
1035 int
1036 hpfs_lookup(struct vop_old_lookup_args *ap)
1037 {
1038         struct vnode *dvp = ap->a_dvp;
1039         struct hpfsnode *dhp = VTOHP(dvp);
1040         struct hpfsmount *hpmp = dhp->h_hpmp;
1041         struct componentname *cnp = ap->a_cnp;
1042         struct ucred *cred = cnp->cn_cred;
1043         int error;
1044         int nameiop = cnp->cn_nameiop;
1045         int flags = cnp->cn_flags;
1046         int lockparent = flags & CNP_LOCKPARENT;
1047 #if HPFS_DEBUG
1048         int wantparent = flags & (CNP_LOCKPARENT | CNP_WANTPARENT);
1049 #endif
1050         dprintf(("hpfs_lookup(0x%x, %s, %ld, %d, %d): \n",
1051                 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen,
1052                 lockparent, wantparent));
1053
1054         if (nameiop != NAMEI_CREATE && nameiop != NAMEI_DELETE && nameiop != NAMEI_LOOKUP) {
1055                 kprintf("hpfs_lookup: LOOKUP, DELETE and CREATE are only supported\n");
1056                 return (EOPNOTSUPP);
1057         }
1058
1059         error = VOP_ACCESS(dvp, VEXEC, cred);
1060         if(error)
1061                 return (error);
1062
1063         if( (cnp->cn_namelen == 1) &&
1064             !strncmp(cnp->cn_nameptr,".",1) ) {
1065                 dprintf(("hpfs_lookup(0x%x,...): . faked\n",dhp->h_no));
1066
1067                 vref(dvp);
1068                 *ap->a_vpp = dvp;
1069
1070                 return (0);
1071         } else if( (cnp->cn_namelen == 2) &&
1072             !strncmp(cnp->cn_nameptr,"..",2) && (flags & CNP_ISDOTDOT) ) {
1073                 dprintf(("hpfs_lookup(0x%x,...): .. faked (0x%x)\n",
1074                         dhp->h_no, dhp->h_fn.fn_parent));
1075
1076                 VOP__UNLOCK(dvp, 0);
1077
1078                 error = VFS_VGET(hpmp->hpm_mp,
1079                                  dhp->h_fn.fn_parent, ap->a_vpp);
1080                 if (error) {
1081                         VOP__LOCK(dvp, 0);
1082                         return(error);
1083                 }
1084
1085                 if (lockparent && (error = VOP__LOCK(dvp, 0))) {
1086                         vput( *(ap->a_vpp) );
1087                         return (error);
1088                 }
1089                 return (error);
1090         } else {
1091                 struct buf *bp;
1092                 struct hpfsdirent *dep;
1093                 struct hpfsnode *hp;
1094
1095                 error = hpfs_genlookupbyname(dhp,
1096                                 cnp->cn_nameptr, cnp->cn_namelen, &bp, &dep);
1097                 if (error) {
1098                         if (error == ENOENT &&
1099                             (nameiop == NAMEI_CREATE || nameiop == NAMEI_RENAME)) {
1100                                 if(!lockparent)
1101                                         VOP__UNLOCK(dvp, 0);
1102                                 return (EJUSTRETURN);
1103                         }
1104
1105                         return (error);
1106                 }
1107
1108                 dprintf(("hpfs_lookup: fnode: 0x%x, CPID: 0x%x\n",
1109                          dep->de_fnode, dep->de_cpid));
1110
1111                 if (nameiop == NAMEI_DELETE) {
1112                         error = VOP_ACCESS(dvp, VWRITE, cred);
1113                         if (error) {
1114                                 brelse(bp);
1115                                 return (error);
1116                         }
1117                 }
1118
1119                 if (dhp->h_no == dep->de_fnode) {
1120                         brelse(bp);
1121                         vref(dvp);
1122                         *ap->a_vpp = dvp;
1123                         return (0);
1124                 }
1125
1126                 error = VFS_VGET(hpmp->hpm_mp, dep->de_fnode, ap->a_vpp);
1127                 if (error) {
1128                         kprintf("hpfs_lookup: VFS_VGET FAILED %d\n", error);
1129                         brelse(bp);
1130                         return(error);
1131                 }
1132
1133                 hp = VTOHP(*ap->a_vpp);
1134
1135                 hp->h_mtime = dep->de_mtime;
1136                 hp->h_ctime = dep->de_ctime;
1137                 hp->h_atime = dep->de_atime;
1138                 bcopy(dep->de_name, hp->h_name, dep->de_namelen);
1139                 hp->h_name[dep->de_namelen] = '\0';
1140                 hp->h_namelen = dep->de_namelen;
1141                 hp->h_flag |= H_PARVALID;
1142
1143                 brelse(bp);
1144
1145                 if(!lockparent)
1146                         VOP__UNLOCK(dvp, 0);
1147         }
1148         return (error);
1149 }
1150
1151 /*
1152  * hpfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1153  *              struct componentname *a_cnp)
1154  */
1155 int
1156 hpfs_remove(struct vop_old_remove_args *ap)
1157 {
1158         int error;
1159
1160         dprintf(("hpfs_remove(0x%x, %s, %ld): \n", VTOHP(ap->a_vp)->h_no,
1161                 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen));
1162
1163         if (ap->a_vp->v_type == VDIR)
1164                 return (EPERM);
1165
1166         error = hpfs_removefnode (ap->a_dvp, ap->a_vp, ap->a_cnp);
1167         return (error);
1168 }
1169
1170 /*
1171  * hpfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1172  *              struct componentname *a_cnp, struct vattr *a_vap)
1173  */
1174 int
1175 hpfs_create(struct vop_old_create_args *ap)
1176 {
1177         int error;
1178
1179         dprintf(("hpfs_create(0x%x, %s, %ld): \n", VTOHP(ap->a_dvp)->h_no,
1180                 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen));
1181
1182         error = hpfs_makefnode (ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1183
1184         return (error);
1185 }
1186
1187 /*
1188  * Return POSIX pathconf information applicable to NTFS filesystem
1189  *
1190  * hpfs_pathconf(struct vnode *a_vp, int a_name, t *a_retval)
1191  */
1192 int
1193 hpfs_pathconf(struct vop_pathconf_args *ap)
1194 {
1195         switch (ap->a_name) {
1196         case _PC_LINK_MAX:
1197                 *ap->a_retval = 1;
1198                 return (0);
1199         case _PC_NAME_MAX:
1200                 *ap->a_retval = HPFS_MAXFILENAME;
1201                 return (0);
1202         case _PC_PATH_MAX:
1203                 *ap->a_retval = PATH_MAX;
1204                 return (0);
1205         case _PC_CHOWN_RESTRICTED:
1206                 *ap->a_retval = 1;
1207                 return (0);
1208         case _PC_NO_TRUNC:
1209                 *ap->a_retval = 0;
1210                 return (0);
1211 #if defined(__NetBSD__)
1212         case _PC_SYNC_IO:
1213                 *ap->a_retval = 1;
1214                 return (0);
1215         case _PC_FILESIZEBITS:
1216                 *ap->a_retval = 32;
1217                 return (0);
1218 #endif
1219         default:
1220                 return (EINVAL);
1221         }
1222         /* NOTREACHED */
1223 }
1224
1225
1226 /*
1227  * Global vfs data structures
1228  */
1229
1230 struct vop_ops hpfs_vnode_vops = {
1231         .vop_default =          vop_defaultop,
1232         .vop_getattr =          hpfs_getattr,
1233         .vop_setattr =          hpfs_setattr,
1234         .vop_inactive =         hpfs_inactive,
1235         .vop_reclaim =          hpfs_reclaim,
1236         .vop_print =            hpfs_print,
1237         .vop_old_create =       hpfs_create,
1238         .vop_old_remove =       hpfs_remove,
1239         .vop_old_lookup =       hpfs_lookup,
1240         .vop_access =           hpfs_access,
1241         .vop_readdir =          hpfs_readdir,
1242         .vop_fsync =            hpfs_fsync,
1243         .vop_bmap =             hpfs_bmap,
1244         .vop_getpages =         hpfs_getpages,
1245         .vop_putpages =         hpfs_putpages,
1246         .vop_strategy =         hpfs_strategy,
1247         .vop_read =             hpfs_read,
1248         .vop_write =            hpfs_write,
1249         .vop_ioctl =            hpfs_ioctl,
1250         .vop_pathconf =         hpfs_pathconf
1251 };
1252