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

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2000-2001 Boris Popov
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD$
   29  */
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/namei.h>
   33 #include <sys/kernel.h>
   34 #include <sys/proc.h>
   35 #include <sys/bio.h>
   36 #include <sys/buf.h>
   37 #include <sys/fcntl.h>
   38 #include <sys/mount.h>
   39 #include <sys/unistd.h>
   40 #include <sys/vnode.h>
   41 #include <sys/limits.h>
   42 #include <sys/lockf.h>
   43 #include <sys/stat.h>
   44 
   45 #include <vm/vm.h>
   46 #include <vm/vm_extern.h>
   47 
   48 #include <netsmb/smb.h>
   49 #include <netsmb/smb_conn.h>
   50 #include <netsmb/smb_subr.h>
   51 
   52 #include <fs/smbfs/smbfs.h>
   53 #include <fs/smbfs/smbfs_node.h>
   54 #include <fs/smbfs/smbfs_subr.h>
   55 
   56 /*
   57  * Prototypes for SMBFS vnode operations
   58  */
   59 static vop_create_t     smbfs_create;
   60 static vop_mknod_t      smbfs_mknod;
   61 static vop_open_t       smbfs_open;
   62 static vop_close_t      smbfs_close;
   63 static vop_access_t     smbfs_access;
   64 static vop_getattr_t    smbfs_getattr;
   65 static vop_setattr_t    smbfs_setattr;
   66 static vop_read_t       smbfs_read;
   67 static vop_write_t      smbfs_write;
   68 static vop_fsync_t      smbfs_fsync;
   69 static vop_remove_t     smbfs_remove;
   70 static vop_link_t       smbfs_link;
   71 static vop_lookup_t     smbfs_lookup;
   72 static vop_rename_t     smbfs_rename;
   73 static vop_mkdir_t      smbfs_mkdir;
   74 static vop_rmdir_t      smbfs_rmdir;
   75 static vop_symlink_t    smbfs_symlink;
   76 static vop_readdir_t    smbfs_readdir;
   77 static vop_strategy_t   smbfs_strategy;
   78 static vop_print_t      smbfs_print;
   79 static vop_pathconf_t   smbfs_pathconf;
   80 static vop_advlock_t    smbfs_advlock;
   81 static vop_getextattr_t smbfs_getextattr;
   82 
   83 struct vop_vector smbfs_vnodeops = {
   84         .vop_default =          &default_vnodeops,
   85 
   86         .vop_access =           smbfs_access,
   87         .vop_advlock =          smbfs_advlock,
   88         .vop_close =            smbfs_close,
   89         .vop_create =           smbfs_create,
   90         .vop_fsync =            smbfs_fsync,
   91         .vop_getattr =          smbfs_getattr,
   92         .vop_getextattr =       smbfs_getextattr,
   93         .vop_getpages =         smbfs_getpages,
   94         .vop_inactive =         smbfs_inactive,
   95         .vop_ioctl =            smbfs_ioctl,
   96         .vop_link =             smbfs_link,
   97         .vop_lookup =           smbfs_lookup,
   98         .vop_mkdir =            smbfs_mkdir,
   99         .vop_mknod =            smbfs_mknod,
  100         .vop_open =             smbfs_open,
  101         .vop_pathconf =         smbfs_pathconf,
  102         .vop_print =            smbfs_print,
  103         .vop_putpages =         smbfs_putpages,
  104         .vop_read =             smbfs_read,
  105         .vop_readdir =          smbfs_readdir,
  106         .vop_reclaim =          smbfs_reclaim,
  107         .vop_remove =           smbfs_remove,
  108         .vop_rename =           smbfs_rename,
  109         .vop_rmdir =            smbfs_rmdir,
  110         .vop_setattr =          smbfs_setattr,
  111 /*      .vop_setextattr =       smbfs_setextattr,*/
  112         .vop_strategy =         smbfs_strategy,
  113         .vop_symlink =          smbfs_symlink,
  114         .vop_write =            smbfs_write,
  115 };
  116 VFS_VOP_VECTOR_REGISTER(smbfs_vnodeops);
  117 
  118 static int
  119 smbfs_access(ap)
  120         struct vop_access_args /* {
  121                 struct vnode *a_vp;
  122                 accmode_t a_accmode;
  123                 struct ucred *a_cred;
  124                 struct thread *a_td;
  125         } */ *ap;
  126 {
  127         struct vnode *vp = ap->a_vp;
  128         accmode_t accmode = ap->a_accmode;
  129         mode_t mpmode;
  130         struct smbmount *smp = VTOSMBFS(vp);
  131 
  132         SMBVDEBUG("\n");
  133         if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
  134                 switch (vp->v_type) {
  135                     case VREG: case VDIR: case VLNK:
  136                         return EROFS;
  137                     default:
  138                         break;
  139                 }
  140         }
  141         mpmode = vp->v_type == VREG ? smp->sm_file_mode : smp->sm_dir_mode;
  142         return (vaccess(vp->v_type, mpmode, smp->sm_uid,
  143             smp->sm_gid, ap->a_accmode, ap->a_cred));
  144 }
  145 
  146 /* ARGSUSED */
  147 static int
  148 smbfs_open(ap)
  149         struct vop_open_args /* {
  150                 struct vnode *a_vp;
  151                 int  a_mode;
  152                 struct ucred *a_cred;
  153                 struct thread *a_td;
  154         } */ *ap;
  155 {
  156         struct vnode *vp = ap->a_vp;
  157         struct smbnode *np = VTOSMB(vp);
  158         struct smb_cred *scred;
  159         struct vattr vattr;
  160         int mode = ap->a_mode;
  161         int error, accmode;
  162 
  163         SMBVDEBUG("%s,%d\n", np->n_name, (np->n_flag & NOPEN) != 0);
  164         if (vp->v_type != VREG && vp->v_type != VDIR) { 
  165                 SMBFSERR("open eacces vtype=%d\n", vp->v_type);
  166                 return EACCES;
  167         }
  168         if (vp->v_type == VDIR) {
  169                 np->n_flag |= NOPEN;
  170                 return 0;
  171         }
  172         if (np->n_flag & NMODIFIED) {
  173                 if ((error = smbfs_vinvalbuf(vp, ap->a_td)) == EINTR)
  174                         return error;
  175                 smbfs_attr_cacheremove(vp);
  176                 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
  177                 if (error)
  178                         return error;
  179                 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
  180         } else {
  181                 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
  182                 if (error)
  183                         return error;
  184                 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
  185                         error = smbfs_vinvalbuf(vp, ap->a_td);
  186                         if (error == EINTR)
  187                                 return error;
  188                         np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
  189                 }
  190         }
  191         if ((np->n_flag & NOPEN) != 0)
  192                 return 0;
  193         /*
  194          * Use DENYNONE to give unixy semantics of permitting
  195          * everything not forbidden by permissions.  Ie denial
  196          * is up to server with clients/openers needing to use
  197          * advisory locks for further control.
  198          */
  199         accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
  200         if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
  201                 accmode = SMB_SM_DENYNONE|SMB_AM_OPENRW;
  202         scred = smbfs_malloc_scred();
  203         smb_makescred(scred, ap->a_td, ap->a_cred);
  204         error = smbfs_smb_open(np, accmode, scred);
  205         if (error) {
  206                 if (mode & FWRITE)
  207                         return EACCES;
  208                 else if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
  209                         accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
  210                         error = smbfs_smb_open(np, accmode, scred);
  211                 }
  212         }
  213         if (error == 0) {
  214                 np->n_flag |= NOPEN;
  215                 vnode_create_vobject(ap->a_vp, vattr.va_size, ap->a_td);
  216         }
  217         smbfs_attr_cacheremove(vp);
  218         smbfs_free_scred(scred);
  219         return error;
  220 }
  221 
  222 static int
  223 smbfs_close(ap)
  224         struct vop_close_args /* {
  225                 struct vnodeop_desc *a_desc;
  226                 struct vnode *a_vp;
  227                 int  a_fflag;
  228                 struct ucred *a_cred;
  229                 struct thread *a_td;
  230         } */ *ap;
  231 {
  232         struct vnode *vp = ap->a_vp;
  233         struct thread *td = ap->a_td;
  234         struct smbnode *np = VTOSMB(vp);
  235         struct smb_cred *scred;
  236 
  237         if (vp->v_type == VDIR && (np->n_flag & NOPEN) != 0 &&
  238             np->n_dirseq != NULL) {
  239                 scred = smbfs_malloc_scred();
  240                 smb_makescred(scred, td, ap->a_cred);
  241                 smbfs_findclose(np->n_dirseq, scred);
  242                 smbfs_free_scred(scred);
  243                 np->n_dirseq = NULL;
  244         }
  245         return 0;
  246 }
  247 
  248 /*
  249  * smbfs_getattr call from vfs.
  250  */
  251 static int
  252 smbfs_getattr(ap)
  253         struct vop_getattr_args /* {
  254                 struct vnode *a_vp;
  255                 struct vattr *a_vap;
  256                 struct ucred *a_cred;
  257         } */ *ap;
  258 {
  259         struct vnode *vp = ap->a_vp;
  260         struct smbnode *np = VTOSMB(vp);
  261         struct vattr *va=ap->a_vap;
  262         struct smbfattr fattr;
  263         struct smb_cred *scred;
  264         u_quad_t oldsize;
  265         int error;
  266 
  267         SMBVDEBUG("%lx: '%s' %d\n", (long)vp, np->n_name, (vp->v_vflag & VV_ROOT) != 0);
  268         error = smbfs_attr_cachelookup(vp, va);
  269         if (!error)
  270                 return 0;
  271         SMBVDEBUG("not in the cache\n");
  272         scred = smbfs_malloc_scred();
  273         smb_makescred(scred, curthread, ap->a_cred);
  274         oldsize = np->n_size;
  275         error = smbfs_smb_lookup(np, NULL, 0, &fattr, scred);
  276         if (error) {
  277                 SMBVDEBUG("error %d\n", error);
  278                 smbfs_free_scred(scred);
  279                 return error;
  280         }
  281         smbfs_attr_cacheenter(vp, &fattr);
  282         smbfs_attr_cachelookup(vp, va);
  283         if (np->n_flag & NOPEN)
  284                 np->n_size = oldsize;
  285         smbfs_free_scred(scred);
  286         return 0;
  287 }
  288 
  289 static int
  290 smbfs_setattr(ap)
  291         struct vop_setattr_args /* {
  292                 struct vnode *a_vp;
  293                 struct vattr *a_vap;
  294                 struct ucred *a_cred;
  295         } */ *ap;
  296 {
  297         struct vnode *vp = ap->a_vp;
  298         struct smbnode *np = VTOSMB(vp);
  299         struct vattr *vap = ap->a_vap;
  300         struct timespec *mtime, *atime;
  301         struct smb_cred *scred;
  302         struct smb_share *ssp = np->n_mount->sm_share;
  303         struct smb_vc *vcp = SSTOVC(ssp);
  304         struct thread *td = curthread;
  305         u_quad_t tsize = 0;
  306         int isreadonly, doclose, error = 0;
  307         int old_n_dosattr;
  308 
  309         SMBVDEBUG("\n");
  310         isreadonly = (vp->v_mount->mnt_flag & MNT_RDONLY);
  311         /*
  312          * Disallow write attempts if the filesystem is mounted read-only.
  313          */
  314         if ((vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL || 
  315              vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
  316              vap->va_mode != (mode_t)VNOVAL || vap->va_flags != VNOVAL) &&
  317              isreadonly)
  318                 return EROFS;
  319 
  320         /*
  321          * We only support setting four flags.  Don't allow setting others.
  322          *
  323          * We map UF_READONLY to SMB_FA_RDONLY, unlike the MacOS X version
  324          * of this code, which maps both UF_IMMUTABLE AND SF_IMMUTABLE to
  325          * SMB_FA_RDONLY.  The immutable flags have different semantics
  326          * than readonly, which is the reason for the difference.
  327          */
  328         if (vap->va_flags != VNOVAL) {
  329                 if (vap->va_flags & ~(UF_HIDDEN|UF_SYSTEM|UF_ARCHIVE|
  330                                       UF_READONLY))
  331                         return EINVAL;
  332         }
  333 
  334         scred = smbfs_malloc_scred();
  335         smb_makescred(scred, td, ap->a_cred);
  336         if (vap->va_size != VNOVAL) {
  337                 switch (vp->v_type) {
  338                     case VDIR:
  339                         error = EISDIR;
  340                         goto out;
  341                     case VREG:
  342                         break;
  343                     default:
  344                         error = EINVAL;
  345                         goto out;
  346                 }
  347                 if (isreadonly) {
  348                         error = EROFS;
  349                         goto out;
  350                 }
  351                 doclose = 0;
  352                 vnode_pager_setsize(vp, (u_long)vap->va_size);
  353                 tsize = np->n_size;
  354                 np->n_size = vap->va_size;
  355                 if ((np->n_flag & NOPEN) == 0) {
  356                         error = smbfs_smb_open(np,
  357                                                SMB_SM_DENYNONE|SMB_AM_OPENRW,
  358                                                scred);
  359                         if (error == 0)
  360                                 doclose = 1;
  361                 }
  362                 if (error == 0)
  363                         error = smbfs_smb_setfsize(np,
  364                             (int64_t)vap->va_size, scred);
  365                 if (doclose)
  366                         smbfs_smb_close(ssp, np->n_fid, NULL, scred);
  367                 if (error) {
  368                         np->n_size = tsize;
  369                         vnode_pager_setsize(vp, (u_long)tsize);
  370                         goto out;
  371                 }
  372         }
  373         if ((vap->va_flags != VNOVAL) || (vap->va_mode != (mode_t)VNOVAL)) {
  374                 old_n_dosattr = np->n_dosattr;
  375 
  376                 if (vap->va_mode != (mode_t)VNOVAL) {
  377                         if (vap->va_mode & S_IWUSR)
  378                                 np->n_dosattr &= ~SMB_FA_RDONLY;
  379                         else
  380                                 np->n_dosattr |= SMB_FA_RDONLY;
  381                 }
  382 
  383                 if (vap->va_flags != VNOVAL) {
  384                         if (vap->va_flags & UF_HIDDEN)
  385                                 np->n_dosattr |= SMB_FA_HIDDEN;
  386                         else
  387                                 np->n_dosattr &= ~SMB_FA_HIDDEN;
  388 
  389                         if (vap->va_flags & UF_SYSTEM)
  390                                 np->n_dosattr |= SMB_FA_SYSTEM;
  391                         else
  392                                 np->n_dosattr &= ~SMB_FA_SYSTEM;
  393 
  394                         if (vap->va_flags & UF_ARCHIVE)
  395                                 np->n_dosattr |= SMB_FA_ARCHIVE;
  396                         else
  397                                 np->n_dosattr &= ~SMB_FA_ARCHIVE;
  398 
  399                         /*
  400                          * We only support setting the immutable / readonly
  401                          * bit for regular files.  According to comments in
  402                          * the MacOS X version of this code, supporting the
  403                          * readonly bit on directories doesn't do the same
  404                          * thing in Windows as in Unix.
  405                          */
  406                         if (vp->v_type == VREG) {
  407                                 if (vap->va_flags & UF_READONLY)
  408                                         np->n_dosattr |= SMB_FA_RDONLY;
  409                                 else
  410                                         np->n_dosattr &= ~SMB_FA_RDONLY;
  411                         }
  412                 }
  413 
  414                 if (np->n_dosattr != old_n_dosattr) {
  415                         error = smbfs_smb_setpattr(np, np->n_dosattr, NULL, scred);
  416                         if (error)
  417                                 goto out;
  418                 }
  419         }
  420         mtime = atime = NULL;
  421         if (vap->va_mtime.tv_sec != VNOVAL)
  422                 mtime = &vap->va_mtime;
  423         if (vap->va_atime.tv_sec != VNOVAL)
  424                 atime = &vap->va_atime;
  425         if (mtime != atime) {
  426                 if (vap->va_vaflags & VA_UTIMES_NULL) {
  427                         error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
  428                         if (error)
  429                                 error = VOP_ACCESS(vp, VWRITE, ap->a_cred, td);
  430                 } else
  431                         error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
  432 #if 0
  433                 if (mtime == NULL)
  434                         mtime = &np->n_mtime;
  435                 if (atime == NULL)
  436                         atime = &np->n_atime;
  437 #endif
  438                 /*
  439                  * If file is opened, then we can use handle based calls.
  440                  * If not, use path based ones.
  441                  */
  442                 if ((np->n_flag & NOPEN) == 0) {
  443                         if (vcp->vc_flags & SMBV_WIN95) {
  444                                 error = VOP_OPEN(vp, FWRITE, ap->a_cred, td,
  445                                     NULL);
  446                                 if (!error) {
  447 /*                                      error = smbfs_smb_setfattrNT(np, 0,
  448                                             mtime, atime, scred);
  449                                         VOP_GETATTR(vp, &vattr, ap->a_cred); */
  450                                         if (mtime)
  451                                                 np->n_mtime = *mtime;
  452                                         VOP_CLOSE(vp, FWRITE, ap->a_cred, td);
  453                                 }
  454                         } else if ((vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS)) {
  455                                 error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
  456 /*                              error = smbfs_smb_setpattrNT(np, 0, mtime, atime, scred);*/
  457                         } else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN2_0) {
  458                                 error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
  459                         } else {
  460                                 error = smbfs_smb_setpattr(np, 0, mtime, scred);
  461                         }
  462                 } else {
  463                         if (vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS) {
  464                                 error = smbfs_smb_setfattrNT(np, 0, mtime, atime, scred);
  465                         } else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN1_0) {
  466                                 error = smbfs_smb_setftime(np, mtime, atime, scred);
  467                         } else {
  468                                 /*
  469                                  * I have no idea how to handle this for core
  470                                  * level servers. The possible solution is to
  471                                  * update mtime after file is closed.
  472                                  */
  473                                  SMBERROR("can't update times on an opened file\n");
  474                         }
  475                 }
  476         }
  477         /*
  478          * Invalidate attribute cache in case if server doesn't set
  479          * required attributes.
  480          */
  481         smbfs_attr_cacheremove(vp);     /* invalidate cache */
  482         VOP_GETATTR(vp, vap, ap->a_cred);
  483         np->n_mtime.tv_sec = vap->va_mtime.tv_sec;
  484 out:
  485         smbfs_free_scred(scred);
  486         return error;
  487 }
  488 /*
  489  * smbfs_read call.
  490  */
  491 static int
  492 smbfs_read(ap)
  493         struct vop_read_args /* {
  494                 struct vnode *a_vp;
  495                 struct uio *a_uio;
  496                 int  a_ioflag;
  497                 struct ucred *a_cred;
  498         } */ *ap;
  499 {
  500         struct vnode *vp = ap->a_vp;
  501         struct uio *uio = ap->a_uio;
  502 
  503         SMBVDEBUG("\n");
  504         if (vp->v_type != VREG && vp->v_type != VDIR)
  505                 return EPERM;
  506         return smbfs_readvnode(vp, uio, ap->a_cred);
  507 }
  508 
  509 static int
  510 smbfs_write(ap)
  511         struct vop_write_args /* {
  512                 struct vnode *a_vp;
  513                 struct uio *a_uio;
  514                 int  a_ioflag;
  515                 struct ucred *a_cred;
  516         } */ *ap;
  517 {
  518         struct vnode *vp = ap->a_vp;
  519         struct uio *uio = ap->a_uio;
  520 
  521         SMBVDEBUG("%d,ofs=%jd,sz=%zd\n",vp->v_type, (intmax_t)uio->uio_offset, 
  522             uio->uio_resid);
  523         if (vp->v_type != VREG)
  524                 return (EPERM);
  525         return smbfs_writevnode(vp, uio, ap->a_cred,ap->a_ioflag);
  526 }
  527 /*
  528  * smbfs_create call
  529  * Create a regular file. On entry the directory to contain the file being
  530  * created is locked.  We must release before we return. We must also free
  531  * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
  532  * only if the SAVESTART bit in cn_flags is clear on success.
  533  */
  534 static int
  535 smbfs_create(ap)
  536         struct vop_create_args /* {
  537                 struct vnode *a_dvp;
  538                 struct vnode **a_vpp;
  539                 struct componentname *a_cnp;
  540                 struct vattr *a_vap;
  541         } */ *ap;
  542 {
  543         struct vnode *dvp = ap->a_dvp;
  544         struct vattr *vap = ap->a_vap;
  545         struct vnode **vpp=ap->a_vpp;
  546         struct componentname *cnp = ap->a_cnp;
  547         struct smbnode *dnp = VTOSMB(dvp);
  548         struct vnode *vp;
  549         struct vattr vattr;
  550         struct smbfattr fattr;
  551         struct smb_cred *scred;
  552         char *name = cnp->cn_nameptr;
  553         int nmlen = cnp->cn_namelen;
  554         int error;
  555 
  556         SMBVDEBUG("\n");
  557         *vpp = NULL;
  558         if (vap->va_type != VREG)
  559                 return EOPNOTSUPP;
  560         if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
  561                 return error;
  562         scred = smbfs_malloc_scred();
  563         smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
  564 
  565         error = smbfs_smb_create(dnp, name, nmlen, scred);
  566         if (error)
  567                 goto out;
  568         error = smbfs_smb_lookup(dnp, name, nmlen, &fattr, scred);
  569         if (error)
  570                 goto out;
  571         error = smbfs_nget(VTOVFS(dvp), dvp, name, nmlen, &fattr, &vp);
  572         if (error)
  573                 goto out;
  574         *vpp = vp;
  575         if (cnp->cn_flags & MAKEENTRY)
  576                 cache_enter(dvp, vp, cnp);
  577 out:
  578         smbfs_free_scred(scred);
  579         return error;
  580 }
  581 
  582 static int
  583 smbfs_remove(ap)
  584         struct vop_remove_args /* {
  585                 struct vnodeop_desc *a_desc;
  586                 struct vnode * a_dvp;
  587                 struct vnode * a_vp;
  588                 struct componentname * a_cnp;
  589         } */ *ap;
  590 {
  591         struct vnode *vp = ap->a_vp;
  592 /*      struct vnode *dvp = ap->a_dvp;*/
  593         struct componentname *cnp = ap->a_cnp;
  594         struct smbnode *np = VTOSMB(vp);
  595         struct smb_cred *scred;
  596         int error;
  597 
  598         if (vp->v_type == VDIR || (np->n_flag & NOPEN) != 0 || vrefcnt(vp) != 1)
  599                 return EPERM;
  600         scred = smbfs_malloc_scred();
  601         smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
  602         error = smbfs_smb_delete(np, scred);
  603         if (error == 0)
  604                 np->n_flag |= NGONE;
  605         cache_purge(vp);
  606         smbfs_free_scred(scred);
  607         return error;
  608 }
  609 
  610 /*
  611  * smbfs_file rename call
  612  */
  613 static int
  614 smbfs_rename(ap)
  615         struct vop_rename_args  /* {
  616                 struct vnode *a_fdvp;
  617                 struct vnode *a_fvp;
  618                 struct componentname *a_fcnp;
  619                 struct vnode *a_tdvp;
  620                 struct vnode *a_tvp;
  621                 struct componentname *a_tcnp;
  622         } */ *ap;
  623 {
  624         struct vnode *fvp = ap->a_fvp;
  625         struct vnode *tvp = ap->a_tvp;
  626         struct vnode *fdvp = ap->a_fdvp;
  627         struct vnode *tdvp = ap->a_tdvp;
  628         struct componentname *tcnp = ap->a_tcnp;
  629 /*      struct componentname *fcnp = ap->a_fcnp;*/
  630         struct smb_cred *scred;
  631         u_int16_t flags = 6;
  632         int error=0;
  633 
  634         scred = NULL;
  635         /* Check for cross-device rename */
  636         if ((fvp->v_mount != tdvp->v_mount) ||
  637             (tvp && (fvp->v_mount != tvp->v_mount))) {
  638                 error = EXDEV;
  639                 goto out;
  640         }
  641 
  642         if (tvp && vrefcnt(tvp) > 1) {
  643                 error = EBUSY;
  644                 goto out;
  645         }
  646         flags = 0x10;                   /* verify all writes */
  647         if (fvp->v_type == VDIR) {
  648                 flags |= 2;
  649         } else if (fvp->v_type == VREG) {
  650                 flags |= 1;
  651         } else {
  652                 return EINVAL;
  653         }
  654         scred = smbfs_malloc_scred();
  655         smb_makescred(scred, tcnp->cn_thread, tcnp->cn_cred);
  656         /*
  657          * It seems that Samba doesn't implement SMB_COM_MOVE call...
  658          */
  659 #ifdef notnow
  660         if (SMB_DIALECT(SSTOCN(smp->sm_share)) >= SMB_DIALECT_LANMAN1_0) {
  661                 error = smbfs_smb_move(VTOSMB(fvp), VTOSMB(tdvp),
  662                     tcnp->cn_nameptr, tcnp->cn_namelen, flags, scred);
  663         } else
  664 #endif
  665         {
  666                 /*
  667                  * We have to do the work atomicaly
  668                  */
  669                 if (tvp && tvp != fvp) {
  670                         error = smbfs_smb_delete(VTOSMB(tvp), scred);
  671                         if (error)
  672                                 goto out_cacherem;
  673                         VTOSMB(fvp)->n_flag |= NGONE;
  674                 }
  675                 error = smbfs_smb_rename(VTOSMB(fvp), VTOSMB(tdvp),
  676                     tcnp->cn_nameptr, tcnp->cn_namelen, scred);
  677         }
  678 
  679         if (fvp->v_type == VDIR) {
  680                 if (tvp != NULL && tvp->v_type == VDIR)
  681                         cache_purge(tdvp);
  682                 cache_purge(fdvp);
  683         }
  684 
  685 out_cacherem:
  686         smbfs_attr_cacheremove(fdvp);
  687         smbfs_attr_cacheremove(tdvp);
  688 out:
  689         smbfs_free_scred(scred);
  690         if (tdvp == tvp)
  691                 vrele(tdvp);
  692         else
  693                 vput(tdvp);
  694         if (tvp)
  695                 vput(tvp);
  696         vrele(fdvp);
  697         vrele(fvp);
  698 #ifdef possible_mistake
  699         vgone(fvp);
  700         if (tvp)
  701                 vgone(tvp);
  702 #endif
  703         return error;
  704 }
  705 
  706 /*
  707  * somtime it will come true...
  708  */
  709 static int
  710 smbfs_link(ap)
  711         struct vop_link_args /* {
  712                 struct vnode *a_tdvp;
  713                 struct vnode *a_vp;
  714                 struct componentname *a_cnp;
  715         } */ *ap;
  716 {
  717         return EOPNOTSUPP;
  718 }
  719 
  720 /*
  721  * smbfs_symlink link create call.
  722  * Sometime it will be functional...
  723  */
  724 static int
  725 smbfs_symlink(ap)
  726         struct vop_symlink_args /* {
  727                 struct vnode *a_dvp;
  728                 struct vnode **a_vpp;
  729                 struct componentname *a_cnp;
  730                 struct vattr *a_vap;
  731                 char *a_target;
  732         } */ *ap;
  733 {
  734         return EOPNOTSUPP;
  735 }
  736 
  737 static int
  738 smbfs_mknod(ap) 
  739         struct vop_mknod_args /* {
  740         } */ *ap;
  741 {
  742         return EOPNOTSUPP;
  743 }
  744 
  745 static int
  746 smbfs_mkdir(ap)
  747         struct vop_mkdir_args /* {
  748                 struct vnode *a_dvp;
  749                 struct vnode **a_vpp;
  750                 struct componentname *a_cnp;
  751                 struct vattr *a_vap;
  752         } */ *ap;
  753 {
  754         struct vnode *dvp = ap->a_dvp;
  755 /*      struct vattr *vap = ap->a_vap;*/
  756         struct vnode *vp;
  757         struct componentname *cnp = ap->a_cnp;
  758         struct smbnode *dnp = VTOSMB(dvp);
  759         struct vattr vattr;
  760         struct smb_cred *scred;
  761         struct smbfattr fattr;
  762         char *name = cnp->cn_nameptr;
  763         int len = cnp->cn_namelen;
  764         int error;
  765 
  766         if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) {
  767                 return error;
  768         }       
  769         if ((name[0] == '.') && ((len == 1) || ((len == 2) && (name[1] == '.'))))
  770                 return EEXIST;
  771         scred = smbfs_malloc_scred();
  772         smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
  773         error = smbfs_smb_mkdir(dnp, name, len, scred);
  774         if (error)
  775                 goto out;
  776         error = smbfs_smb_lookup(dnp, name, len, &fattr, scred);
  777         if (error)
  778                 goto out;
  779         error = smbfs_nget(VTOVFS(dvp), dvp, name, len, &fattr, &vp);
  780         if (error)
  781                 goto out;
  782         *ap->a_vpp = vp;
  783 out:
  784         smbfs_free_scred(scred);
  785         return error;
  786 }
  787 
  788 /*
  789  * smbfs_remove directory call
  790  */
  791 static int
  792 smbfs_rmdir(ap)
  793         struct vop_rmdir_args /* {
  794                 struct vnode *a_dvp;
  795                 struct vnode *a_vp;
  796                 struct componentname *a_cnp;
  797         } */ *ap;
  798 {
  799         struct vnode *vp = ap->a_vp;
  800         struct vnode *dvp = ap->a_dvp;
  801         struct componentname *cnp = ap->a_cnp;
  802 /*      struct smbmount *smp = VTOSMBFS(vp);*/
  803         struct smbnode *dnp = VTOSMB(dvp);
  804         struct smbnode *np = VTOSMB(vp);
  805         struct smb_cred *scred;
  806         int error;
  807 
  808         if (dvp == vp)
  809                 return EINVAL;
  810 
  811         scred = smbfs_malloc_scred();
  812         smb_makescred(scred, cnp->cn_thread, cnp->cn_cred);
  813         error = smbfs_smb_rmdir(np, scred);
  814         if (error == 0)
  815                 np->n_flag |= NGONE;
  816         dnp->n_flag |= NMODIFIED;
  817         smbfs_attr_cacheremove(dvp);
  818 /*      cache_purge(dvp);*/
  819         cache_purge(vp);
  820         smbfs_free_scred(scred);
  821         return error;
  822 }
  823 
  824 /*
  825  * smbfs_readdir call
  826  */
  827 static int
  828 smbfs_readdir(ap)
  829         struct vop_readdir_args /* {
  830                 struct vnode *a_vp;
  831                 struct uio *a_uio;
  832                 struct ucred *a_cred;
  833                 int *a_eofflag;
  834                 u_long *a_cookies;
  835                 int a_ncookies;
  836         } */ *ap;
  837 {
  838         struct vnode *vp = ap->a_vp;
  839         struct uio *uio = ap->a_uio;
  840         int error;
  841 
  842         if (vp->v_type != VDIR)
  843                 return (EPERM);
  844 #ifdef notnow
  845         if (ap->a_ncookies) {
  846                 printf("smbfs_readdir: no support for cookies now...");
  847                 return (EOPNOTSUPP);
  848         }
  849 #endif
  850         error = smbfs_readvnode(vp, uio, ap->a_cred);
  851         return error;
  852 }
  853 
  854 /* ARGSUSED */
  855 static int
  856 smbfs_fsync(ap)
  857         struct vop_fsync_args /* {
  858                 struct vnodeop_desc *a_desc;
  859                 struct vnode * a_vp;
  860                 struct ucred * a_cred;
  861                 int  a_waitfor;
  862                 struct thread * a_td;
  863         } */ *ap;
  864 {
  865 /*      return (smb_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));*/
  866     return (0);
  867 }
  868 
  869 static 
  870 int smbfs_print (ap) 
  871         struct vop_print_args /* {
  872         struct vnode *a_vp;
  873         } */ *ap;
  874 {
  875         struct vnode *vp = ap->a_vp;
  876         struct smbnode *np = VTOSMB(vp);
  877 
  878         if (np == NULL) {
  879                 printf("no smbnode data\n");
  880                 return (0);
  881         }
  882         printf("\tname = %s, parent = %p, open = %d\n", np->n_name,
  883             np->n_parent ? np->n_parent : NULL, (np->n_flag & NOPEN) != 0);
  884         return (0);
  885 }
  886 
  887 static int
  888 smbfs_pathconf (ap)
  889         struct vop_pathconf_args  /* {
  890         struct vnode *vp;
  891         int name;
  892         register_t *retval;
  893         } */ *ap;
  894 {
  895         struct smbmount *smp = VFSTOSMBFS(VTOVFS(ap->a_vp));
  896         struct smb_vc *vcp = SSTOVC(smp->sm_share);
  897         long *retval = ap->a_retval;
  898         int error = 0;
  899 
  900         switch (ap->a_name) {
  901             case _PC_FILESIZEBITS:
  902                 if (vcp->vc_sopt.sv_caps & (SMB_CAP_LARGE_READX |
  903                     SMB_CAP_LARGE_WRITEX))
  904                     *retval = 64;
  905                 else
  906                     *retval = 32;
  907                 break;
  908             case _PC_NAME_MAX:
  909                 *retval = (vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12;
  910                 break;
  911             case _PC_PATH_MAX:
  912                 *retval = 800;  /* XXX: a correct one ? */
  913                 break;
  914             case _PC_NO_TRUNC:
  915                 *retval = 1;
  916                 break;
  917             default:
  918                 error = vop_stdpathconf(ap);
  919         }
  920         return error;
  921 }
  922 
  923 static int
  924 smbfs_strategy (ap) 
  925         struct vop_strategy_args /* {
  926         struct buf *a_bp
  927         } */ *ap;
  928 {
  929         struct buf *bp=ap->a_bp;
  930         struct ucred *cr;
  931         struct thread *td;
  932 
  933         SMBVDEBUG("\n");
  934         if (bp->b_flags & B_ASYNC)
  935                 td = (struct thread *)0;
  936         else
  937                 td = curthread; /* XXX */
  938         if (bp->b_iocmd == BIO_READ)
  939                 cr = bp->b_rcred;
  940         else
  941                 cr = bp->b_wcred;
  942 
  943         if ((bp->b_flags & B_ASYNC) == 0 )
  944                 (void)smbfs_doio(ap->a_vp, bp, cr, td);
  945         return (0);
  946 }
  947 
  948 int
  949 smbfs_ioctl(ap)
  950         struct vop_ioctl_args /* {
  951                 struct vnode *a_vp;
  952                 u_long a_command;
  953                 caddr_t a_data;
  954                 int fflag;
  955                 struct ucred *cred;
  956                 struct thread *td;
  957         } */ *ap;
  958 {
  959         return ENOTTY;
  960 }
  961 
  962 static char smbfs_atl[] = "rhsvda";
  963 static int
  964 smbfs_getextattr(struct vop_getextattr_args *ap)
  965 /* {
  966         IN struct vnode *a_vp;
  967         IN char *a_name;
  968         INOUT struct uio *a_uio;
  969         IN struct ucred *a_cred;
  970         IN struct thread *a_td;
  971 };
  972 */
  973 {
  974         struct vnode *vp = ap->a_vp;
  975         struct thread *td = ap->a_td;
  976         struct ucred *cred = ap->a_cred;
  977         struct uio *uio = ap->a_uio;
  978         const char *name = ap->a_name;
  979         struct smbnode *np = VTOSMB(vp);
  980         struct vattr vattr;
  981         char buf[10];
  982         int i, attr, error;
  983 
  984         error = VOP_ACCESS(vp, VREAD, cred, td);
  985         if (error)
  986                 return error;
  987         error = VOP_GETATTR(vp, &vattr, cred);
  988         if (error)
  989                 return error;
  990         if (strcmp(name, "dosattr") == 0) {
  991                 attr = np->n_dosattr;
  992                 for (i = 0; i < 6; i++, attr >>= 1)
  993                         buf[i] = (attr & 1) ? smbfs_atl[i] : '-';
  994                 buf[i] = 0;
  995                 error = uiomove(buf, i, uio);
  996                 
  997         } else
  998                 error = EINVAL;
  999         return error;
 1000 }
 1001 
 1002 /*
 1003  * Since we expected to support F_GETLK (and SMB protocol has no such function),
 1004  * it is necessary to use lf_advlock(). It would be nice if this function had
 1005  * a callback mechanism because it will help to improve a level of consistency.
 1006  */
 1007 int
 1008 smbfs_advlock(ap)
 1009         struct vop_advlock_args /* {
 1010                 struct vnode *a_vp;
 1011                 caddr_t  a_id;
 1012                 int  a_op;
 1013                 struct flock *a_fl;
 1014                 int  a_flags;
 1015         } */ *ap;
 1016 {
 1017         struct vnode *vp = ap->a_vp;
 1018         struct smbnode *np = VTOSMB(vp);
 1019         struct flock *fl = ap->a_fl;
 1020         caddr_t id = (caddr_t)1 /* ap->a_id */;
 1021 /*      int flags = ap->a_flags;*/
 1022         struct thread *td = curthread;
 1023         struct smb_cred *scred;
 1024         u_quad_t size;
 1025         off_t start, end, oadd;
 1026         int error, lkop;
 1027 
 1028         if (vp->v_type == VDIR) {
 1029                 /*
 1030                  * SMB protocol have no support for directory locking.
 1031                  * Although locks can be processed on local machine, I don't
 1032                  * think that this is a good idea, because some programs
 1033                  * can work wrong assuming directory is locked. So, we just
 1034                  * return 'operation not supported
 1035                  */
 1036                  return EOPNOTSUPP;
 1037         }
 1038         size = np->n_size;
 1039         switch (fl->l_whence) {
 1040         case SEEK_SET:
 1041         case SEEK_CUR:
 1042                 start = fl->l_start;
 1043                 break;
 1044 
 1045         case SEEK_END:
 1046                 if (size > OFF_MAX ||
 1047                     (fl->l_start > 0 && size > OFF_MAX - fl->l_start))
 1048                         return EOVERFLOW;
 1049                 start = size + fl->l_start;
 1050                 break;
 1051 
 1052         default:
 1053                 return EINVAL;
 1054         }
 1055         if (start < 0)
 1056                 return EINVAL;
 1057         if (fl->l_len < 0) {
 1058                 if (start == 0)
 1059                         return EINVAL;
 1060                 end = start - 1;
 1061                 start += fl->l_len;
 1062                 if (start < 0)
 1063                         return EINVAL;
 1064         } else if (fl->l_len == 0)
 1065                 end = -1;
 1066         else {
 1067                 oadd = fl->l_len - 1;
 1068                 if (oadd > OFF_MAX - start)
 1069                         return EOVERFLOW;
 1070                 end = start + oadd;
 1071         }
 1072         scred = smbfs_malloc_scred();
 1073         smb_makescred(scred, td, td->td_ucred);
 1074         switch (ap->a_op) {
 1075             case F_SETLK:
 1076                 switch (fl->l_type) {
 1077                     case F_WRLCK:
 1078                         lkop = SMB_LOCK_EXCL;
 1079                         break;
 1080                     case F_RDLCK:
 1081                         lkop = SMB_LOCK_SHARED;
 1082                         break;
 1083                     case F_UNLCK:
 1084                         lkop = SMB_LOCK_RELEASE;
 1085                         break;
 1086                     default:
 1087                         smbfs_free_scred(scred);
 1088                         return EINVAL;
 1089                 }
 1090                 error = lf_advlock(ap, &vp->v_lockf, size);
 1091                 if (error)
 1092                         break;
 1093                 lkop = SMB_LOCK_EXCL;
 1094                 error = smbfs_smb_lock(np, lkop, id, start, end, scred);
 1095                 if (error) {
 1096                         int oldtype = fl->l_type;
 1097                         fl->l_type = F_UNLCK;
 1098                         ap->a_op = F_UNLCK;
 1099                         lf_advlock(ap, &vp->v_lockf, size);
 1100                         fl->l_type = oldtype;
 1101                 }
 1102                 break;
 1103             case F_UNLCK:
 1104                 lf_advlock(ap, &vp->v_lockf, size);
 1105                 error = smbfs_smb_lock(np, SMB_LOCK_RELEASE, id, start, end, scred);
 1106                 break;
 1107             case F_GETLK:
 1108                 error = lf_advlock(ap, &vp->v_lockf, size);
 1109                 break;
 1110             default:
 1111                 smbfs_free_scred(scred);
 1112                 return EINVAL;
 1113         }
 1114         smbfs_free_scred(scred);
 1115         return error;
 1116 }
 1117 
 1118 static int
 1119 smbfs_pathcheck(struct smbmount *smp, const char *name, int nmlen, int nameiop)
 1120 {
 1121         static const char *badchars = "*/:<>?";
 1122         static const char *badchars83 = " +|,[]=;";
 1123         const char *cp;
 1124         int i, error;
 1125 
 1126         /*
 1127          * Backslash characters, being a path delimiter, are prohibited
 1128          * within a path component even for LOOKUP operations.
 1129          */
 1130         if (strchr(name, '\\') != NULL)
 1131                 return ENOENT;
 1132 
 1133         if (nameiop == LOOKUP)
 1134                 return 0;
 1135         error = ENOENT;
 1136         if (SMB_DIALECT(SSTOVC(smp->sm_share)) < SMB_DIALECT_LANMAN2_0) {
 1137                 /*
 1138                  * Name should conform 8.3 format
 1139                  */
 1140                 if (nmlen > 12)
 1141                         return ENAMETOOLONG;
 1142                 cp = strchr(name, '.');
 1143                 if (cp == NULL)
 1144                         return error;
 1145                 if (cp == name || (cp - name) > 8)
 1146                         return error;
 1147                 cp = strchr(cp + 1, '.');
 1148                 if (cp != NULL)
 1149                         return error;
 1150                 for (cp = name, i = 0; i < nmlen; i++, cp++)
 1151                         if (strchr(badchars83, *cp) != NULL)
 1152                                 return error;
 1153         }
 1154         for (cp = name, i = 0; i < nmlen; i++, cp++)
 1155                 if (strchr(badchars, *cp) != NULL)
 1156                         return error;
 1157         return 0;
 1158 }
 1159 
 1160 /*
 1161  * Things go even weird without fixed inode numbers...
 1162  */
 1163 int
 1164 smbfs_lookup(ap)
 1165         struct vop_lookup_args /* {
 1166                 struct vnodeop_desc *a_desc;
 1167                 struct vnode *a_dvp;
 1168                 struct vnode **a_vpp;
 1169                 struct componentname *a_cnp;
 1170         } */ *ap;
 1171 {
 1172         struct componentname *cnp = ap->a_cnp;
 1173         struct thread *td = cnp->cn_thread;
 1174         struct vnode *dvp = ap->a_dvp;
 1175         struct vnode **vpp = ap->a_vpp;
 1176         struct vnode *vp;
 1177         struct smbmount *smp;
 1178         struct mount *mp = dvp->v_mount;
 1179         struct smbnode *dnp;
 1180         struct smbfattr fattr, *fap;
 1181         struct smb_cred *scred;
 1182         char *name = cnp->cn_nameptr;
 1183         int flags = cnp->cn_flags;
 1184         int nameiop = cnp->cn_nameiop;
 1185         int nmlen = cnp->cn_namelen;
 1186         int error, islastcn, isdot;
 1187         int killit;
 1188 
 1189         SMBVDEBUG("\n");
 1190         if (dvp->v_type != VDIR)
 1191                 return ENOTDIR;
 1192         if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) {
 1193                 SMBFSERR("invalid '..'\n");
 1194                 return EIO;
 1195         }
 1196         islastcn = flags & ISLASTCN;
 1197         if (islastcn && (mp->mnt_flag & MNT_RDONLY) && (nameiop != LOOKUP))
 1198                 return EROFS;
 1199         error = vn_dir_check_exec(dvp, cnp);
 1200         if (error != 0)
 1201                 return error;
 1202         smp = VFSTOSMBFS(mp);
 1203         dnp = VTOSMB(dvp);
 1204         isdot = (nmlen == 1 && name[0] == '.');
 1205 
 1206         error = smbfs_pathcheck(smp, cnp->cn_nameptr, cnp->cn_namelen, nameiop);
 1207 
 1208         if (error) 
 1209                 return ENOENT;
 1210 
 1211         error = cache_lookup(dvp, vpp, cnp, NULL, NULL);
 1212         SMBVDEBUG("cache_lookup returned %d\n", error);
 1213         if (error > 0)
 1214                 return error;
 1215         if (error) {            /* name was found */
 1216                 struct vattr vattr;
 1217 
 1218                 killit = 0;
 1219                 vp = *vpp;
 1220                 error = VOP_GETATTR(vp, &vattr, cnp->cn_cred);
 1221                 /*
 1222                  * If the file type on the server is inconsistent
 1223                  * with what it was when we created the vnode,
 1224                  * kill the bogus vnode now and fall through to
 1225                  * the code below to create a new one with the
 1226                  * right type.
 1227                  */
 1228                 if (error == 0 &&
 1229                    ((vp->v_type == VDIR &&
 1230                    (VTOSMB(vp)->n_dosattr & SMB_FA_DIR) == 0) ||
 1231                    (vp->v_type == VREG &&
 1232                    (VTOSMB(vp)->n_dosattr & SMB_FA_DIR) != 0)))
 1233                    killit = 1;
 1234                 else if (error == 0
 1235              /*    && vattr.va_ctime.tv_sec == VTOSMB(vp)->n_ctime*/) {
 1236                      if (nameiop != LOOKUP && islastcn)
 1237                              cnp->cn_flags |= SAVENAME;
 1238                      SMBVDEBUG("use cached vnode\n");
 1239                      return (0);
 1240                 }
 1241                 cache_purge(vp);
 1242                 /*
 1243                  * XXX This is not quite right, if '.' is
 1244                  * inconsistent, we really need to start the lookup
 1245                  * all over again.  Hopefully there is some other
 1246                  * guarantee that prevents this case from happening.
 1247                  */
 1248                 if (killit && vp != dvp)
 1249                         vgone(vp);
 1250                 if (vp != dvp)
 1251                         vput(vp);
 1252                 else
 1253                         vrele(vp);
 1254                 *vpp = NULLVP;
 1255         }
 1256         /* 
 1257          * entry is not in the cache or has been expired
 1258          */
 1259         error = 0;
 1260         *vpp = NULLVP;
 1261         scred = smbfs_malloc_scred();
 1262         smb_makescred(scred, td, cnp->cn_cred);
 1263         fap = &fattr;
 1264         if (flags & ISDOTDOT) {
 1265                 /*
 1266                  * In the DOTDOT case, don't go over-the-wire
 1267                  * in order to request attributes. We already
 1268                  * know it's a directory and subsequent call to
 1269                  * smbfs_getattr() will restore consistency.
 1270                  *
 1271                  */
 1272                 SMBVDEBUG("smbfs_smb_lookup: dotdot\n");
 1273         } else if (isdot) {
 1274                 error = smbfs_smb_lookup(dnp, NULL, 0, fap, scred);
 1275                 SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
 1276         }
 1277         else {
 1278                 error = smbfs_smb_lookup(dnp, name, nmlen, fap, scred);
 1279                 SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
 1280         }
 1281         if (error && error != ENOENT)
 1282                 goto out;
 1283         if (error) {                    /* entry not found */
 1284                 /*
 1285                  * Handle RENAME or CREATE case...
 1286                  */
 1287                 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
 1288                         error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
 1289                         if (error)
 1290                                 goto out;
 1291                         cnp->cn_flags |= SAVENAME;
 1292                         error = EJUSTRETURN;
 1293                         goto out;
 1294                 }
 1295                 error = ENOENT;
 1296                 goto out;
 1297         }/* else {
 1298                 SMBVDEBUG("Found entry %s with id=%d\n", fap->entryName, fap->dirEntNum);
 1299         }*/
 1300         /*
 1301          * handle DELETE case ...
 1302          */
 1303         if (nameiop == DELETE && islastcn) {    /* delete last component */
 1304                 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
 1305                 if (error)
 1306                         goto out;
 1307                 if (isdot) {
 1308                         VREF(dvp);
 1309                         *vpp = dvp;
 1310                         goto out;
 1311                 }
 1312                 error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
 1313                 if (error)
 1314                         goto out;
 1315                 *vpp = vp;
 1316                 cnp->cn_flags |= SAVENAME;
 1317                 goto out;
 1318         }
 1319         if (nameiop == RENAME && islastcn) {
 1320                 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
 1321                 if (error)
 1322                         goto out;
 1323                 if (isdot) {
 1324                         error = EISDIR;
 1325                         goto out;
 1326                 }
 1327                 error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
 1328                 if (error)
 1329                         goto out;
 1330                 *vpp = vp;
 1331                 cnp->cn_flags |= SAVENAME;
 1332                 goto out;
 1333         }
 1334         if (flags & ISDOTDOT) {
 1335                 mp = dvp->v_mount;
 1336                 error = vfs_busy(mp, MBF_NOWAIT);
 1337                 if (error != 0) {
 1338                         vfs_ref(mp);
 1339                         VOP_UNLOCK(dvp);
 1340                         error = vfs_busy(mp, 0);
 1341                         vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
 1342                         vfs_rel(mp);
 1343                         if (error) {
 1344                                 error = ENOENT;
 1345                                 goto out;
 1346                         }
 1347                         if (VN_IS_DOOMED(dvp)) {
 1348                                 vfs_unbusy(mp);
 1349                                 error = ENOENT;
 1350                                 goto out;
 1351                         }
 1352                 }       
 1353                 VOP_UNLOCK(dvp);
 1354                 error = smbfs_nget(mp, dvp, name, nmlen, NULL, &vp);
 1355                 vfs_unbusy(mp);
 1356                 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
 1357                 if (VN_IS_DOOMED(dvp)) {
 1358                         if (error == 0)
 1359                                 vput(vp);
 1360                         error = ENOENT;
 1361                 }
 1362                 if (error)
 1363                         goto out;
 1364                 *vpp = vp;
 1365         } else if (isdot) {
 1366                 vref(dvp);
 1367                 *vpp = dvp;
 1368         } else {
 1369                 error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
 1370                 if (error)
 1371                         goto out;
 1372                 *vpp = vp;
 1373                 SMBVDEBUG("lookup: getnewvp!\n");
 1374         }
 1375         if ((cnp->cn_flags & MAKEENTRY)/* && !islastcn*/) {
 1376 /*              VTOSMB(*vpp)->n_ctime = VTOSMB(*vpp)->n_vattr.va_ctime.tv_sec;*/
 1377                 cache_enter(dvp, *vpp, cnp);
 1378         }
 1379 out:
 1380         smbfs_free_scred(scred);
 1381         return (error);
 1382 }

Cache object: e005b6da1f36990d1fd1cccc620cd70d


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