The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/fs/hpfs/hpfs_vnops.c

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    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  * $FreeBSD$
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/kernel.h>
   32 #include <sys/proc.h>
   33 #include <sys/conf.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/bio.h>
   42 #include <sys/buf.h>
   43 #include <sys/dirent.h>
   44 
   45 #include <vm/vm.h>
   46 #include <vm/vm_param.h>
   47 #include <vm/vm_page.h>
   48 #include <vm/vm_object.h>
   49 #include <vm/vm_pager.h>
   50 #include <vm/vnode_pager.h>
   51 #include <vm/vm_extern.h>
   52 
   53 #include <sys/unistd.h> /* for pathconf(2) constants */
   54 
   55 #include <fs/hpfs/hpfs.h>
   56 #include <fs/hpfs/hpfsmount.h>
   57 #include <fs/hpfs/hpfs_subr.h>
   58 #include <fs/hpfs/hpfs_ioctl.h>
   59 
   60 static int      hpfs_de_uiomove(struct hpfsmount *, struct hpfsdirent *,
   61                                      struct uio *);
   62 static vop_ioctl_t      hpfs_ioctl;
   63 static vop_read_t       hpfs_read;
   64 static vop_write_t      hpfs_write;
   65 static vop_getattr_t    hpfs_getattr;
   66 static vop_setattr_t    hpfs_setattr;
   67 static vop_inactive_t   hpfs_inactive;
   68 static vop_print_t      hpfs_print;
   69 static vop_reclaim_t    hpfs_reclaim;
   70 static vop_strategy_t   hpfs_strategy;
   71 static vop_access_t     hpfs_access;
   72 static vop_open_t       hpfs_open;
   73 static vop_close_t      hpfs_close;
   74 static vop_readdir_t    hpfs_readdir;
   75 static vop_cachedlookup_t       hpfs_lookup;
   76 static vop_create_t     hpfs_create;
   77 static vop_remove_t     hpfs_remove;
   78 static vop_bmap_t       hpfs_bmap;
   79 static vop_fsync_t      hpfs_fsync;
   80 static vop_pathconf_t   hpfs_pathconf;
   81 
   82 static int
   83 hpfs_fsync(ap)
   84         struct vop_fsync_args /* {
   85                 struct vnode *a_vp;
   86                 struct ucred *a_cred;
   87                 int a_waitfor;
   88                 struct thread *a_td;
   89         } */ *ap;
   90 {
   91         /*
   92          * Flush our dirty buffers.
   93          */
   94         vop_stdfsync(ap);
   95 
   96         /*
   97          * Write out the on-disc version of the vnode.
   98          */
   99         return hpfs_update(VTOHP(ap->a_vp));
  100 }
  101 
  102 static int
  103 hpfs_ioctl (
  104         struct vop_ioctl_args /* {
  105                 struct vnode *a_vp;
  106                 u_long a_command;
  107                 caddr_t a_data;
  108                 int a_fflag;
  109                 struct ucred *a_cred;
  110                 struct thread *a_td;
  111         } */ *ap)
  112 {
  113         register struct vnode *vp = ap->a_vp;
  114         register struct hpfsnode *hp = VTOHP(vp);
  115         int error;
  116 
  117         printf("hpfs_ioctl(0x%x, 0x%lx, 0x%p, 0x%x): ",
  118                 hp->h_no, ap->a_command, ap->a_data, ap->a_fflag);
  119 
  120         switch (ap->a_command) {
  121         case HPFSIOCGEANUM: {
  122                 u_long eanum;
  123                 u_long passed;
  124                 struct ea *eap;
  125 
  126                 eanum = 0;
  127 
  128                 if (hp->h_fn.fn_ealen > 0) {
  129                         eap = (struct ea *)&(hp->h_fn.fn_int);
  130                         passed = 0;
  131 
  132                         while (passed < hp->h_fn.fn_ealen) {
  133 
  134                                 printf("EAname: %s\n", EA_NAME(eap));
  135 
  136                                 eanum++;
  137                                 passed += sizeof(struct ea) +
  138                                           eap->ea_namelen + 1 + eap->ea_vallen;
  139                                 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
  140                                                 passed);
  141                         }
  142                         error = 0;
  143                 } else {
  144                         error = ENOENT;
  145                 }
  146 
  147                 printf("%lu eas\n", eanum);
  148 
  149                 *(u_long *)ap->a_data = eanum;
  150 
  151                 break;
  152         }
  153         case HPFSIOCGEASZ: {
  154                 u_long eanum;
  155                 u_long passed;
  156                 struct ea *eap;
  157 
  158                 printf("EA%ld\n", *(u_long *)ap->a_data);
  159 
  160                 eanum = 0;
  161                 if (hp->h_fn.fn_ealen > 0) {
  162                         eap = (struct ea *)&(hp->h_fn.fn_int);
  163                         passed = 0;
  164 
  165                         error = ENOENT;
  166                         while (passed < hp->h_fn.fn_ealen) {
  167                                 printf("EAname: %s\n", EA_NAME(eap));
  168 
  169                                 if (eanum == *(u_long *)ap->a_data) {
  170                                         *(u_long *)ap->a_data =
  171                                                 eap->ea_namelen + 1 +
  172                                                 eap->ea_vallen;
  173 
  174                                         error = 0;
  175                                         break;
  176                                 }
  177 
  178                                 eanum++;
  179                                 passed += sizeof(struct ea) +
  180                                           eap->ea_namelen + 1 + eap->ea_vallen;
  181                                 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
  182                                                 passed);
  183                         }
  184                 } else {
  185                         error = ENOENT;
  186                 }
  187 
  188                 break;
  189         }
  190         case HPFSIOCRDEA: {
  191                 u_long eanum;
  192                 u_long passed;
  193                 struct hpfs_rdea *rdeap;
  194                 struct ea *eap;
  195 
  196                 rdeap = (struct hpfs_rdea *)ap->a_data;
  197                 printf("EA%ld\n", rdeap->ea_no);
  198 
  199                 eanum = 0;
  200                 if (hp->h_fn.fn_ealen > 0) {
  201                         eap = (struct ea *)&(hp->h_fn.fn_int);
  202                         passed = 0;
  203 
  204                         error = ENOENT;
  205                         while (passed < hp->h_fn.fn_ealen) {
  206                                 printf("EAname: %s\n", EA_NAME(eap));
  207 
  208                                 if (eanum == rdeap->ea_no) {
  209                                         rdeap->ea_sz = eap->ea_namelen + 1 +
  210                                                         eap->ea_vallen;
  211                                         copyout(EA_NAME(eap),rdeap->ea_data,
  212                                                 rdeap->ea_sz);
  213                                         error = 0;
  214                                         break;
  215                                 }
  216 
  217                                 eanum++;
  218                                 passed += sizeof(struct ea) +
  219                                           eap->ea_namelen + 1 + eap->ea_vallen;
  220                                 eap = (struct ea *)((caddr_t)hp->h_fn.fn_int +
  221                                                 passed);
  222                         }
  223                 } else {
  224                         error = ENOENT;
  225                 }
  226 
  227                 break;
  228         }
  229         default:
  230                 error = ENOTTY;
  231                 break;
  232         }
  233         return (error);
  234 }
  235 
  236 /*
  237  * Map file offset to disk offset.
  238  */
  239 int
  240 hpfs_bmap(ap)
  241         struct vop_bmap_args /* {
  242                 struct vnode *a_vp;
  243                 daddr_t  a_bn;
  244                 struct bufobj **a_bop;
  245                 daddr_t *a_bnp;
  246                 int *a_runp;
  247                 int *a_runb;
  248         } */ *ap;
  249 {
  250         register struct hpfsnode *hp = VTOHP(ap->a_vp);
  251         daddr_t blkno;
  252         int error;
  253 
  254         if (ap->a_bop != NULL) 
  255                 *ap->a_bop = &hp->h_devvp->v_bufobj;
  256         if (ap->a_runb != NULL)
  257                 *ap->a_runb = 0;
  258         if (ap->a_bnp == NULL)
  259                 return (0);
  260 
  261         dprintf(("hpfs_bmap(0x%x, 0x%x): ",hp->h_no, ap->a_bn));
  262 
  263         error = hpfs_hpbmap (hp, ap->a_bn, &blkno, ap->a_runp);
  264         *ap->a_bnp = blkno;
  265 
  266         return (error);
  267 }
  268 
  269 static int
  270 hpfs_read(ap)
  271         struct vop_read_args /* {
  272                 struct vnode *a_vp;
  273                 struct uio *a_uio;
  274                 int a_ioflag;
  275                 struct ucred *a_cred;
  276         } */ *ap;
  277 {
  278         register struct vnode *vp = ap->a_vp;
  279         register struct hpfsnode *hp = VTOHP(vp);
  280         struct uio *uio = ap->a_uio;
  281         struct buf *bp;
  282         u_int xfersz, toread;
  283         u_int off;
  284         daddr_t lbn, bn;
  285         int resid;
  286         int runl;
  287         int error = 0;
  288 
  289         resid = min (uio->uio_resid, hp->h_fn.fn_size - uio->uio_offset);
  290 
  291         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));
  292 
  293         while (resid) {
  294                 lbn = uio->uio_offset >> DEV_BSHIFT;
  295                 off = uio->uio_offset & (DEV_BSIZE - 1);
  296                 dprintf(("hpfs_read: resid: 0x%x lbn: 0x%x off: 0x%x\n",
  297                         uio->uio_resid, lbn, off));
  298                 error = hpfs_hpbmap(hp, lbn, &bn, &runl);
  299                 if (error)
  300                         return (error);
  301 
  302                 toread = min(off + resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE));
  303                 xfersz = (toread + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
  304                 dprintf(("hpfs_read: bn: 0x%x (0x%x) toread: 0x%x (0x%x)\n",
  305                         bn, runl, toread, xfersz));
  306 
  307                 if (toread == 0) 
  308                         break;
  309 
  310                 error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp);
  311                 if (error) {
  312                         brelse(bp);
  313                         break;
  314                 }
  315 
  316                 error = uiomove(bp->b_data + off, toread - off, uio);
  317                 if(error) {
  318                         brelse(bp);
  319                         break;
  320                 }
  321                 brelse(bp);
  322                 resid -= toread;
  323         }
  324         dprintf(("hpfs_read: successful\n"));
  325         return (error);
  326 }
  327 
  328 static int
  329 hpfs_write(ap)
  330         struct vop_write_args /* {
  331                 struct vnode *a_vp;
  332                 struct uio *a_uio;
  333                 int  a_ioflag;
  334                 struct ucred *a_cred;
  335         } */ *ap;
  336 {
  337         register struct vnode *vp = ap->a_vp;
  338         register struct hpfsnode *hp = VTOHP(vp);
  339         struct uio *uio = ap->a_uio;
  340         struct buf *bp;
  341         u_int xfersz, towrite;
  342         u_int off;
  343         daddr_t lbn, bn;
  344         int runl;
  345         int error = 0;
  346 
  347         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));
  348 
  349         if (ap->a_ioflag & IO_APPEND) {
  350                 dprintf(("hpfs_write: APPEND mode\n"));
  351                 uio->uio_offset = hp->h_fn.fn_size;
  352         }
  353         if (uio->uio_offset + uio->uio_resid > hp->h_fn.fn_size) {
  354                 error = hpfs_extend (hp, uio->uio_offset + uio->uio_resid);
  355                 if (error) {
  356                         printf("hpfs_write: hpfs_extend FAILED %d\n", error);
  357                         return (error);
  358                 }
  359         }
  360 
  361         while (uio->uio_resid) {
  362                 lbn = uio->uio_offset >> DEV_BSHIFT;
  363                 off = uio->uio_offset & (DEV_BSIZE - 1);
  364                 dprintf(("hpfs_write: resid: 0x%x lbn: 0x%x off: 0x%x\n",
  365                         uio->uio_resid, lbn, off));
  366                 error = hpfs_hpbmap(hp, lbn, &bn, &runl);
  367                 if (error)
  368                         return (error);
  369 
  370                 towrite = min(off + uio->uio_resid, min(DFLTPHYS, (runl+1)*DEV_BSIZE));
  371                 xfersz = (towrite + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1);
  372                 dprintf(("hpfs_write: bn: 0x%x (0x%x) towrite: 0x%x (0x%x)\n",
  373                         bn, runl, towrite, xfersz));
  374 
  375                 if ((off == 0) && (towrite == xfersz)) {
  376                         bp = getblk(hp->h_devvp, bn, xfersz, 0, 0, 0);
  377                         clrbuf(bp);
  378                 } else {
  379                         error = bread(hp->h_devvp, bn, xfersz, NOCRED, &bp);
  380                         if (error) {
  381                                 brelse(bp);
  382                                 return (error);
  383                         }
  384                 }
  385 
  386                 error = uiomove(bp->b_data + off, towrite - off, uio);
  387                 if(error) {
  388                         brelse(bp);
  389                         return (error);
  390                 }
  391 
  392                 if (ap->a_ioflag & IO_SYNC)
  393                         bwrite(bp);
  394                 else
  395                         bawrite(bp);
  396         }
  397 
  398         dprintf(("hpfs_write: successful\n"));
  399         return (0);
  400 }
  401 
  402 /*
  403  * XXXXX do we need hpfsnode locking inside?
  404  */
  405 static int
  406 hpfs_getattr(ap)
  407         struct vop_getattr_args /* {
  408                 struct vnode *a_vp;
  409                 struct vattr *a_vap;
  410                 struct ucred *a_cred;
  411                 struct thread *a_td;
  412         } */ *ap;
  413 {
  414         register struct vnode *vp = ap->a_vp;
  415         register struct hpfsnode *hp = VTOHP(vp);
  416         register struct vattr *vap = ap->a_vap;
  417         int error;
  418 
  419         dprintf(("hpfs_getattr(0x%x):\n", hp->h_no));
  420 
  421         vap->va_fsid = dev2udev(hp->h_dev);
  422         vap->va_fileid = hp->h_no;
  423         vap->va_mode = hp->h_mode;
  424         vap->va_nlink = 1;
  425         vap->va_uid = hp->h_uid;
  426         vap->va_gid = hp->h_gid;
  427         vap->va_rdev = 0;                               /* XXX UNODEV ? */
  428         vap->va_size = hp->h_fn.fn_size;
  429         vap->va_bytes = ((hp->h_fn.fn_size + DEV_BSIZE-1) & ~(DEV_BSIZE-1)) +
  430                         DEV_BSIZE;
  431 
  432         if (!(hp->h_flag & H_PARVALID)) {
  433                 error = hpfs_validateparent(hp);
  434                 if (error) 
  435                         return (error);
  436         }
  437         vap->va_atime = hpfstimetounix(hp->h_atime);
  438         vap->va_mtime = hpfstimetounix(hp->h_mtime);
  439         vap->va_ctime = hpfstimetounix(hp->h_ctime);
  440 
  441         vap->va_flags = 0;
  442         vap->va_gen = 0;
  443         vap->va_blocksize = DEV_BSIZE;
  444         vap->va_type = vp->v_type;
  445         vap->va_filerev = 0;
  446 
  447         return (0);
  448 }
  449 
  450 /*
  451  * XXXXX do we need hpfsnode locking inside?
  452  */
  453 static int
  454 hpfs_setattr(ap)
  455         struct vop_setattr_args /* {
  456                 struct vnode *a_vp;
  457                 struct vattr *a_vap;
  458                 struct ucred *a_cred;
  459                 struct thread *a_td;
  460         } */ *ap;
  461 {
  462         struct vnode *vp = ap->a_vp;
  463         struct hpfsnode *hp = VTOHP(vp);
  464         struct vattr *vap = ap->a_vap;
  465         struct ucred *cred = ap->a_cred;
  466         struct thread *td = ap->a_td;
  467         int error;
  468 
  469         dprintf(("hpfs_setattr(0x%x):\n", hp->h_no));
  470 
  471         /*
  472          * Check for unsettable attributes.
  473          */
  474         if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
  475             (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
  476             (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
  477             (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
  478                 dprintf(("hpfs_setattr: changing nonsettable attr\n"));
  479                 return (EINVAL);
  480         }
  481 
  482         /* Can't change flags XXX Could be implemented */
  483         if (vap->va_flags != VNOVAL) {
  484                 printf("hpfs_setattr: FLAGS CANNOT BE SET\n");
  485                 return (EINVAL);
  486         }
  487 
  488         /* Can't change uid/gid XXX Could be implemented */
  489         if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
  490                 printf("hpfs_setattr: UID/GID CANNOT BE SET\n");
  491                 return (EINVAL);
  492         }
  493 
  494         /* Can't change mode XXX Could be implemented */
  495         if (vap->va_mode != (mode_t)VNOVAL) {
  496                 printf("hpfs_setattr: MODE CANNOT BE SET\n");
  497                 return (EINVAL);
  498         }
  499 
  500         /* Update times */
  501         if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
  502                 if (vp->v_mount->mnt_flag & MNT_RDONLY)
  503                         return (EROFS);
  504                 if (cred->cr_uid != hp->h_uid &&
  505                     (error = suser_cred(cred, SUSER_ALLOWJAIL)) &&
  506                     ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
  507                     (error = VOP_ACCESS(vp, VWRITE, cred, td))))
  508                         return (error);
  509                 if (vap->va_atime.tv_sec != VNOVAL)
  510                         hp->h_atime = vap->va_atime.tv_sec;
  511                 if (vap->va_mtime.tv_sec != VNOVAL)
  512                         hp->h_mtime = vap->va_mtime.tv_sec;
  513 
  514                 hp->h_flag |= H_PARCHANGE;
  515         }
  516 
  517         if (vap->va_size != VNOVAL) {
  518                 switch (vp->v_type) {
  519                 case VDIR:
  520                         return (EISDIR);
  521                 case VREG:
  522                         if (vp->v_mount->mnt_flag & MNT_RDONLY)
  523                                 return (EROFS);
  524                         break;
  525                 default:
  526                         printf("hpfs_setattr: WRONG v_type\n");
  527                         return (EINVAL);
  528                 }
  529 
  530                 if (vap->va_size < hp->h_fn.fn_size) {
  531                         error = vtruncbuf(vp, cred, td, vap->va_size, DEV_BSIZE);
  532                         if (error)
  533                                 return (error);
  534                         error = hpfs_truncate(hp, vap->va_size);
  535                         if (error)
  536                                 return (error);
  537 
  538                 } else if (vap->va_size > hp->h_fn.fn_size) {
  539                         vnode_pager_setsize(vp, vap->va_size);
  540                         error = hpfs_extend(hp, vap->va_size);
  541                         if (error)
  542                                 return (error);
  543                 }
  544         }
  545 
  546         return (0);
  547 }
  548 
  549 /*
  550  * Last reference to a node.  If necessary, write or delete it.
  551  */
  552 int
  553 hpfs_inactive(ap)
  554         struct vop_inactive_args /* {
  555                 struct vnode *a_vp;
  556         } */ *ap;
  557 {
  558         register struct vnode *vp = ap->a_vp;
  559         register struct hpfsnode *hp = VTOHP(vp);
  560         int error;
  561 
  562         dprintf(("hpfs_inactive(0x%x): \n", hp->h_no));
  563 
  564         if (hp->h_flag & H_CHANGE) {
  565                 dprintf(("hpfs_inactive: node changed, update\n"));
  566                 error = hpfs_update (hp);
  567                 if (error)
  568                         return (error);
  569         }
  570 
  571         if (hp->h_flag & H_PARCHANGE) {
  572                 dprintf(("hpfs_inactive: parent node changed, update\n"));
  573                 error = hpfs_updateparent (hp);
  574                 if (error)
  575                         return (error);
  576         }
  577 
  578         if (prtactive && vrefcnt(vp) != 0)
  579                 vprint("hpfs_inactive: pushing active", vp);
  580 
  581         if (hp->h_flag & H_INVAL) {
  582                 vrecycle(vp, ap->a_td);
  583                 return (0);
  584         }
  585 
  586         return (0);
  587 }
  588 
  589 /*
  590  * Reclaim an inode so that it can be used for other purposes.
  591  */
  592 int
  593 hpfs_reclaim(ap)
  594         struct vop_reclaim_args /* {
  595                 struct vnode *a_vp;
  596         } */ *ap;
  597 {
  598         register struct vnode *vp = ap->a_vp;
  599         register struct hpfsnode *hp = VTOHP(vp);
  600 
  601         dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no));
  602 
  603         /*
  604          * Destroy the vm object and flush associated pages.
  605          */
  606         vnode_destroy_vobject(vp);
  607 
  608         vfs_hash_remove(vp);
  609 
  610         mtx_destroy(&hp->h_interlock);
  611 
  612         vp->v_data = NULL;
  613 
  614         FREE(hp, M_HPFSNO);
  615 
  616         return (0);
  617 }
  618 
  619 static int
  620 hpfs_print(ap)
  621         struct vop_print_args /* {
  622                 struct vnode *a_vp;
  623         } */ *ap;
  624 {
  625         register struct vnode *vp = ap->a_vp;
  626         register struct hpfsnode *hp = VTOHP(vp);
  627 
  628         printf("\tino 0x%x\n", hp->h_no);
  629         return (0);
  630 }
  631 
  632 /*
  633  * Calculate the logical to physical mapping if not done already,
  634  * then call the device strategy routine.
  635  *
  636  * In order to be able to swap to a file, the hpfs_hpbmap operation may not
  637  * deadlock on memory.  See hpfs_bmap() for details. XXXXXXX (not impl)
  638  */
  639 int
  640 hpfs_strategy(ap)
  641         struct vop_strategy_args /* {
  642                 struct buf *a_bp;
  643         } */ *ap;
  644 {
  645         register struct buf *bp = ap->a_bp;
  646         register struct vnode *vp = ap->a_vp;
  647         register struct hpfsnode *hp = VTOHP(ap->a_vp);
  648         daddr_t blkno;
  649         struct bufobj *bo;
  650         int error;
  651 
  652         dprintf(("hpfs_strategy(): \n"));
  653 
  654         if (vp->v_type == VBLK || vp->v_type == VCHR)
  655                 panic("hpfs_strategy: spec");
  656         if (bp->b_blkno == bp->b_lblkno) {
  657                 error = hpfs_hpbmap (hp, bp->b_lblkno, &blkno, NULL);
  658                 bp->b_blkno = blkno;
  659                 if (error) {
  660                         printf("hpfs_strategy: hpfs_bpbmap FAILED %d\n", error);
  661                         bp->b_error = error;
  662                         bp->b_ioflags |= BIO_ERROR;
  663                         bufdone(bp);
  664                         return (error);
  665                 }
  666                 if ((long)bp->b_blkno == -1)
  667                         vfs_bio_clrbuf(bp);
  668         }
  669         if ((long)bp->b_blkno == -1) {
  670                 bufdone(bp);
  671                 return (0);
  672         }
  673         bp->b_iooffset = dbtob(bp->b_blkno);
  674         bo = hp->h_hpmp->hpm_bo;
  675         BO_STRATEGY(bo, bp);
  676         return (0);
  677 }
  678 
  679 /*
  680  * XXXXX do we need hpfsnode locking inside?
  681  */
  682 int
  683 hpfs_access(ap)
  684         struct vop_access_args /* {
  685                 struct vnode *a_vp;
  686                 int  a_mode;
  687                 struct ucred *a_cred;
  688                 struct thread *a_td;
  689         } */ *ap;
  690 {
  691         struct vnode *vp = ap->a_vp;
  692         struct hpfsnode *hp = VTOHP(vp);
  693         mode_t mode = ap->a_mode;
  694 
  695         dprintf(("hpfs_access(0x%x):\n", hp->h_no));
  696 
  697         /*
  698          * Disallow write attempts on read-only filesystems;
  699          * unless the file is a socket, fifo, or a block or
  700          * character device resident on the filesystem.
  701          */
  702         if (mode & VWRITE) {
  703                 switch ((int)vp->v_type) {
  704                 case VDIR:
  705                 case VLNK:
  706                 case VREG:
  707                         if (vp->v_mount->mnt_flag & MNT_RDONLY)
  708                                 return (EROFS);
  709                         break;
  710                 }
  711         }
  712 
  713         return (vaccess(vp->v_type, hp->h_mode, hp->h_uid, hp->h_gid,
  714             ap->a_mode, ap->a_cred, NULL));
  715 }
  716 
  717 /*
  718  * Open called.
  719  *
  720  * Nothing to do.
  721  */
  722 /* ARGSUSED */
  723 static int
  724 hpfs_open(ap)
  725         struct vop_open_args /* {
  726                 struct vnode *a_vp;
  727                 int  a_mode;
  728                 struct ucred *a_cred;
  729                 struct thread *a_td;
  730         } */ *ap;
  731 {
  732 #if HPFS_DEBUG
  733         register struct vnode *vp = ap->a_vp;
  734         register struct hpfsnode *hp = VTOHP(vp);
  735 
  736         printf("hpfs_open(0x%x):\n",hp->h_no);
  737 #endif
  738 
  739         /*
  740          * Files marked append-only must be opened for appending.
  741          */
  742 
  743         return (0);
  744 }
  745 
  746 /*
  747  * Close called.
  748  *
  749  * Update the times on the inode.
  750  */
  751 /* ARGSUSED */
  752 static int
  753 hpfs_close(ap)
  754         struct vop_close_args /* {
  755                 struct vnode *a_vp;
  756                 int  a_fflag;
  757                 struct ucred *a_cred;
  758                 struct thread *a_td;
  759         } */ *ap;
  760 {
  761 #if HPFS_DEBUG
  762         register struct vnode *vp = ap->a_vp;
  763         register struct hpfsnode *hp = VTOHP(vp);
  764 
  765         printf("hpfs_close: %d\n",hp->h_no);
  766 #endif
  767 
  768         return (0);
  769 }
  770 
  771 static int
  772 hpfs_de_uiomove (
  773         struct hpfsmount *hpmp,
  774         struct hpfsdirent *dep,
  775         struct uio *uio)
  776 {
  777         struct dirent cde;
  778         int i, error;
  779 
  780         dprintf(("[no: 0x%x, size: %d, name: %2d:%.*s, flag: 0x%x] ",
  781                 dep->de_fnode, dep->de_size, dep->de_namelen,
  782                 dep->de_namelen, dep->de_name, dep->de_flag));
  783 
  784         /*strncpy(cde.d_name, dep->de_name, dep->de_namelen);*/
  785         for (i=0; i<dep->de_namelen; i++) 
  786                 cde.d_name[i] = hpfs_d2u(hpmp, dep->de_name[i]);
  787 
  788         cde.d_name[dep->de_namelen] = '\0';
  789         cde.d_namlen = dep->de_namelen;
  790         cde.d_fileno = dep->de_fnode;
  791         cde.d_type = (dep->de_flag & DE_DIR) ? DT_DIR : DT_REG;
  792         cde.d_reclen = sizeof(struct dirent);
  793 
  794         error = uiomove((char *)&cde, sizeof(struct dirent), uio);
  795         if (error)
  796                 return (error);
  797         
  798         dprintf(("[0x%x] ", uio->uio_resid));
  799         return (error);
  800 }
  801 
  802 
  803 static struct dirent hpfs_de_dot =
  804         { 0, sizeof(struct dirent), DT_DIR, 1, "." };
  805 static struct dirent hpfs_de_dotdot =
  806         { 0, sizeof(struct dirent), DT_DIR, 2, ".." };
  807 int
  808 hpfs_readdir(ap)
  809         struct vop_readdir_args /* {
  810                 struct vnode *a_vp;
  811                 struct uio *a_uio;
  812                 struct ucred *a_cred;
  813                 int *a_ncookies;
  814                 u_int **cookies;
  815         } */ *ap;
  816 {
  817         register struct vnode *vp = ap->a_vp;
  818         register struct hpfsnode *hp = VTOHP(vp);
  819         struct hpfsmount *hpmp = hp->h_hpmp;
  820         struct uio *uio = ap->a_uio;
  821         int ncookies = 0, i, num, cnum;
  822         int error = 0;
  823         off_t off;
  824         struct buf *bp;
  825         struct dirblk *dp;
  826         struct hpfsdirent *dep;
  827         lsn_t olsn;
  828         lsn_t lsn;
  829         int level;
  830 
  831         dprintf(("hpfs_readdir(0x%x, 0x%x, 0x%x): ",hp->h_no,(u_int32_t)uio->uio_offset,uio->uio_resid));
  832 
  833         off = uio->uio_offset;
  834 
  835         if( uio->uio_offset < sizeof(struct dirent) ) {
  836                 dprintf((". faked, "));
  837                 hpfs_de_dot.d_fileno = hp->h_no;
  838                 error = uiomove((char *)&hpfs_de_dot,sizeof(struct dirent),uio);
  839                 if(error) {
  840                         return (error);
  841                 }
  842 
  843                 ncookies ++;
  844         }
  845 
  846         if( uio->uio_offset < 2 * sizeof(struct dirent) ) {
  847                 dprintf((".. faked, "));
  848                 hpfs_de_dotdot.d_fileno = hp->h_fn.fn_parent;
  849 
  850                 error = uiomove((char *)&hpfs_de_dotdot, sizeof(struct dirent),
  851                                 uio);
  852                 if(error) {
  853                         return (error);
  854                 }
  855 
  856                 ncookies ++;
  857         }
  858 
  859         num = uio->uio_offset / sizeof(struct dirent) - 2;
  860         cnum = 0;
  861 
  862         lsn = ((alleaf_t *)hp->h_fn.fn_abd)->al_lsn;
  863 
  864         olsn = 0;
  865         level = 1;
  866 
  867 dive:
  868         dprintf(("[dive 0x%x] ", lsn));
  869         error = bread(hp->h_devvp, lsn, D_BSIZE, NOCRED, &bp);
  870         if (error) {
  871                 brelse(bp);
  872                 return (error);
  873         }
  874 
  875         dp = (struct dirblk *) bp->b_data;
  876         if (dp->d_magic != D_MAGIC) {
  877                 printf("hpfs_readdir: MAGIC DOESN'T MATCH\n");
  878                 brelse(bp);
  879                 return (EINVAL);
  880         }
  881 
  882         dep = D_DIRENT(dp);
  883 
  884         if (olsn) {
  885                 dprintf(("[restore 0x%x] ", olsn));
  886 
  887                 while(!(dep->de_flag & DE_END) ) {
  888                         if((dep->de_flag & DE_DOWN) &&
  889                            (olsn == DE_DOWNLSN(dep)))
  890                                          break;
  891                         dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
  892                 }
  893 
  894                 if((dep->de_flag & DE_DOWN) && (olsn == DE_DOWNLSN(dep))) {
  895                         if (dep->de_flag & DE_END)
  896                                 goto blockdone;
  897 
  898                         if (!(dep->de_flag & DE_SPECIAL)) {
  899                                 if (num <= cnum) {
  900                                         if (uio->uio_resid < sizeof(struct dirent)) {
  901                                                 brelse(bp);
  902                                                 dprintf(("[resid] "));
  903                                                 goto readdone;
  904                                         }
  905 
  906                                         error = hpfs_de_uiomove(hpmp, dep, uio);
  907                                         if (error) {
  908                                                 brelse (bp);
  909                                                 return (error);
  910                                         }
  911                                         ncookies++;
  912 
  913                                         if (uio->uio_resid < sizeof(struct dirent)) {
  914                                                 brelse(bp);
  915                                                 dprintf(("[resid] "));
  916                                                 goto readdone;
  917                                         }
  918                                 }
  919                                 cnum++;
  920                         }
  921 
  922                         dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
  923                 } else {
  924                         printf("hpfs_readdir: ERROR! oLSN not found\n");
  925                         brelse(bp);
  926                         return (EINVAL);
  927                 }
  928         }
  929 
  930         olsn = 0;
  931 
  932         while(!(dep->de_flag & DE_END)) {
  933                 if(dep->de_flag & DE_DOWN) {
  934                         lsn = DE_DOWNLSN(dep);
  935                         brelse(bp);
  936                         level++;
  937                         goto dive;
  938                 }
  939 
  940                 if (!(dep->de_flag & DE_SPECIAL)) {
  941                         if (num <= cnum) {
  942                                 if (uio->uio_resid < sizeof(struct dirent)) {
  943                                         brelse(bp);
  944                                         dprintf(("[resid] "));
  945                                         goto readdone;
  946                                 }
  947 
  948                                 error = hpfs_de_uiomove(hpmp, dep, uio);
  949                                 if (error) {
  950                                         brelse (bp);
  951                                         return (error);
  952                                 }
  953                                 ncookies++;
  954                                 
  955                                 if (uio->uio_resid < sizeof(struct dirent)) {
  956                                         brelse(bp);
  957                                         dprintf(("[resid] "));
  958                                         goto readdone;
  959                                 }
  960                         }
  961                         cnum++;
  962                 }
  963 
  964                 dep = (hpfsdirent_t *)((caddr_t)dep + dep->de_reclen);
  965         }
  966 
  967         if(dep->de_flag & DE_DOWN) {
  968                 dprintf(("[enddive] "));
  969                 lsn = DE_DOWNLSN(dep);
  970                 brelse(bp);
  971                 level++;
  972                 goto dive;
  973         }
  974 
  975 blockdone:
  976         dprintf(("[EOB] "));
  977         olsn = lsn;
  978         lsn = dp->d_parent;
  979         brelse(bp);
  980         level--;
  981 
  982         dprintf(("[level %d] ", level));
  983 
  984         if (level > 0)
  985                 goto dive;      /* undive really */
  986 
  987         if (ap->a_eofflag) {
  988             dprintf(("[EOF] "));
  989             *ap->a_eofflag = 1;
  990         }
  991 
  992 readdone:
  993         dprintf(("[readdone]\n"));
  994         if (!error && ap->a_ncookies != NULL) {
  995                 struct dirent* dpStart;
  996                 struct dirent* dp;
  997                 u_long *cookies;
  998                 u_long *cookiep;
  999 
 1000                 dprintf(("%d cookies, ",ncookies));
 1001                 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
 1002                         panic("hpfs_readdir: unexpected uio from NFS server");
 1003                 dpStart = (struct dirent *)
 1004                      ((caddr_t)uio->uio_iov->iov_base -
 1005                          (uio->uio_offset - off));
 1006                 MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
 1007                        M_TEMP, M_WAITOK);
 1008                 for (dp = dpStart, cookiep = cookies, i=0;
 1009                      i < ncookies;
 1010                      dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) {
 1011                         off += dp->d_reclen;
 1012                         *cookiep++ = (u_int) off;
 1013                 }
 1014                 *ap->a_ncookies = ncookies;
 1015                 *ap->a_cookies = cookies;
 1016         }
 1017 
 1018         return (0);
 1019 }
 1020 
 1021 int
 1022 hpfs_lookup(ap)
 1023         struct vop_cachedlookup_args /* {
 1024                 struct vnode *a_dvp;
 1025                 struct vnode **a_vpp;
 1026                 struct componentname *a_cnp;
 1027         } */ *ap;
 1028 {
 1029         register struct vnode *dvp = ap->a_dvp;
 1030         register struct hpfsnode *dhp = VTOHP(dvp);
 1031         struct hpfsmount *hpmp = dhp->h_hpmp;
 1032         struct componentname *cnp = ap->a_cnp;
 1033         struct ucred *cred = cnp->cn_cred;
 1034         int error;
 1035         int nameiop = cnp->cn_nameiop;
 1036         int flags = cnp->cn_flags;
 1037         dprintf(("hpfs_lookup(0x%x, %s, %ld):\n",
 1038                 dhp->h_no, cnp->cn_nameptr, cnp->cn_namelen));
 1039 
 1040         if (nameiop != CREATE && nameiop != DELETE && nameiop != LOOKUP) {
 1041                 printf("hpfs_lookup: LOOKUP, DELETE and CREATE are only supported\n");
 1042                 return (EOPNOTSUPP);
 1043         }
 1044 
 1045         error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread);
 1046         if(error)
 1047                 return (error);
 1048 
 1049         if( (cnp->cn_namelen == 1) &&
 1050             !strncmp(cnp->cn_nameptr,".",1) ) {
 1051                 dprintf(("hpfs_lookup(0x%x,...): . faked\n",dhp->h_no));
 1052 
 1053                 VREF(dvp);
 1054                 *ap->a_vpp = dvp;
 1055 
 1056                 return (0);
 1057         } else if( (cnp->cn_namelen == 2) &&
 1058             !strncmp(cnp->cn_nameptr,"..",2) && (flags & ISDOTDOT) ) {
 1059                 dprintf(("hpfs_lookup(0x%x,...): .. faked (0x%x)\n",
 1060                         dhp->h_no, dhp->h_fn.fn_parent));
 1061 
 1062                 if (VFS_VGET(hpmp->hpm_mp, dhp->h_fn.fn_parent,
 1063                     LK_NOWAIT | LK_EXCLUSIVE, ap->a_vpp)) {
 1064                         VOP_UNLOCK(dvp,0,cnp->cn_thread);
 1065                         error = VFS_VGET(hpmp->hpm_mp,
 1066                                  dhp->h_fn.fn_parent, LK_EXCLUSIVE, ap->a_vpp); 
 1067                         vn_lock(dvp, LK_EXCLUSIVE|LK_RETRY, cnp->cn_thread);
 1068                         if (error)
 1069                                 return(error);
 1070                 }
 1071                 return (0);
 1072         } else {
 1073                 struct buf *bp;
 1074                 struct hpfsdirent *dep;
 1075                 struct hpfsnode *hp;
 1076 
 1077                 error = hpfs_genlookupbyname(dhp,
 1078                                 cnp->cn_nameptr, cnp->cn_namelen, &bp, &dep);
 1079                 if (error) {
 1080                         if ((error == ENOENT) && (flags & ISLASTCN) &&
 1081                             (nameiop == CREATE || nameiop == RENAME)) {
 1082                                 cnp->cn_flags |= SAVENAME;
 1083                                 return (EJUSTRETURN);
 1084                         }
 1085 
 1086                         return (error);
 1087                 }
 1088 
 1089                 dprintf(("hpfs_lookup: fnode: 0x%x, CPID: 0x%x\n",
 1090                          dep->de_fnode, dep->de_cpid));
 1091 
 1092                 if (nameiop == DELETE && (flags & ISLASTCN)) {
 1093                         error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread);
 1094                         if (error) {
 1095                                 brelse(bp);
 1096                                 return (error);
 1097                         }
 1098                 }
 1099 
 1100                 if (dhp->h_no == dep->de_fnode) {
 1101                         brelse(bp);
 1102                         VREF(dvp);
 1103                         *ap->a_vpp = dvp;
 1104                         return (0);
 1105                 }
 1106 
 1107                 error = VFS_VGET(hpmp->hpm_mp, dep->de_fnode, LK_EXCLUSIVE,
 1108                                  ap->a_vpp);
 1109                 if (error) {
 1110                         printf("hpfs_lookup: VFS_VGET FAILED %d\n", error);
 1111                         brelse(bp);
 1112                         return(error);
 1113                 }
 1114 
 1115                 hp = VTOHP(*ap->a_vpp);
 1116 
 1117                 hp->h_mtime = dep->de_mtime;
 1118                 hp->h_ctime = dep->de_ctime;
 1119                 hp->h_atime = dep->de_atime;
 1120                 bcopy(dep->de_name, hp->h_name, dep->de_namelen);
 1121                 hp->h_name[dep->de_namelen] = '\0';
 1122                 hp->h_namelen = dep->de_namelen;
 1123                 hp->h_flag |= H_PARVALID;
 1124 
 1125                 brelse(bp);
 1126 
 1127                 if ((flags & MAKEENTRY) &&
 1128                     (!(flags & ISLASTCN) || 
 1129                      (nameiop != DELETE && nameiop != CREATE)))
 1130                         cache_enter(dvp, *ap->a_vpp, cnp);
 1131         }
 1132         return (error);
 1133 }
 1134 
 1135 int
 1136 hpfs_remove(ap)
 1137         struct vop_remove_args /* {
 1138                 struct vnode *a_dvp;
 1139                 struct vnode *a_vp;
 1140                 struct componentname *a_cnp;
 1141         } */ *ap;
 1142 {
 1143         int error;
 1144 
 1145         dprintf(("hpfs_remove(0x%x, %s, %ld): \n", VTOHP(ap->a_vp)->h_no,
 1146                 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen));
 1147 
 1148         if (ap->a_vp->v_type == VDIR)
 1149                 return (EPERM);
 1150 
 1151         error = hpfs_removefnode (ap->a_dvp, ap->a_vp, ap->a_cnp);
 1152         return (error);
 1153 }
 1154 
 1155 int
 1156 hpfs_create(ap)
 1157         struct vop_create_args /* {
 1158                 struct vnode *a_dvp;
 1159                 struct vnode **a_vpp;
 1160                 struct componentname *a_cnp;
 1161                 struct vattr *a_vap;
 1162         } */ *ap;
 1163 {
 1164         int error;
 1165 
 1166         dprintf(("hpfs_create(0x%x, %s, %ld): \n", VTOHP(ap->a_dvp)->h_no,
 1167                 ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen));
 1168 
 1169         if (!(ap->a_cnp->cn_flags & HASBUF)) 
 1170                 panic ("hpfs_create: no name\n");
 1171 
 1172         error = hpfs_makefnode (ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
 1173 
 1174         return (error);
 1175 }
 1176 
 1177 /*
 1178  * Return POSIX pathconf information applicable to NTFS filesystem
 1179  */
 1180 int
 1181 hpfs_pathconf(ap)
 1182         struct vop_pathconf_args /* {
 1183                 struct vnode *a_vp;
 1184                 int a_name;
 1185                 register_t *a_retval;
 1186         } */ *ap;
 1187 {
 1188         switch (ap->a_name) {
 1189         case _PC_LINK_MAX:
 1190                 *ap->a_retval = 1;
 1191                 return (0);
 1192         case _PC_NAME_MAX:
 1193                 *ap->a_retval = HPFS_MAXFILENAME;
 1194                 return (0);
 1195         case _PC_PATH_MAX:
 1196                 *ap->a_retval = PATH_MAX;
 1197                 return (0);
 1198         case _PC_CHOWN_RESTRICTED:
 1199                 *ap->a_retval = 1;
 1200                 return (0);
 1201         case _PC_NO_TRUNC:
 1202                 *ap->a_retval = 0;
 1203                 return (0);
 1204         default:
 1205                 return (EINVAL);
 1206         }
 1207         /* NOTREACHED */
 1208 }
 1209 
 1210 
 1211 /*
 1212  * Global vfs data structures
 1213  */
 1214 struct vop_vector hpfs_vnodeops = {
 1215         .vop_default =          &default_vnodeops,
 1216 
 1217         .vop_access =           hpfs_access,
 1218         .vop_bmap =             hpfs_bmap,
 1219         .vop_cachedlookup =     hpfs_lookup,
 1220         .vop_close =            hpfs_close,
 1221         .vop_create =           hpfs_create,
 1222         .vop_fsync =            hpfs_fsync,
 1223         .vop_getattr =          hpfs_getattr,
 1224         .vop_inactive =         hpfs_inactive,
 1225         .vop_ioctl =            hpfs_ioctl,
 1226         .vop_lookup =           vfs_cache_lookup,
 1227         .vop_open =             hpfs_open,
 1228         .vop_pathconf =         hpfs_pathconf,
 1229         .vop_print =            hpfs_print,
 1230         .vop_read =             hpfs_read,
 1231         .vop_readdir =          hpfs_readdir,
 1232         .vop_reclaim =          hpfs_reclaim,
 1233         .vop_remove =           hpfs_remove,
 1234         .vop_setattr =          hpfs_setattr,
 1235         .vop_strategy =         hpfs_strategy,
 1236         .vop_write =            hpfs_write,
 1237 };

Cache object: ac5a908708a690159ff07e7490663a5d


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