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

Cache object: 1239c95d972be9b3e7a5ed7621e788de


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