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

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    1 /*-
    2  * Copyright (c) 1999, 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  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *    This product includes software developed by Boris Popov.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/8.4/sys/fs/nwfs/nwfs_vnops.c 187960 2009-01-31 18:06:34Z bz $
   33  */
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/namei.h>
   37 #include <sys/kernel.h>
   38 #include <sys/bio.h>
   39 #include <sys/buf.h>
   40 #include <sys/fcntl.h>
   41 #include <sys/mount.h>
   42 #include <sys/unistd.h>
   43 #include <sys/vnode.h>
   44 
   45 #include <vm/vm.h>
   46 #include <vm/vm_extern.h>
   47 
   48 #include <machine/mutex.h>
   49 
   50 #include <netncp/ncp.h>
   51 #include <netncp/ncp_conn.h>
   52 #include <netncp/ncp_subr.h>
   53 #include <netncp/nwerror.h>
   54 #include <netncp/ncp_nls.h>
   55 
   56 #include <fs/nwfs/nwfs.h>
   57 #include <fs/nwfs/nwfs_node.h>
   58 #include <fs/nwfs/nwfs_subr.h>
   59 
   60 /*
   61  * Prototypes for NWFS vnode operations
   62  */
   63 static vop_create_t     nwfs_create;
   64 static vop_mknod_t      nwfs_mknod;
   65 static vop_open_t       nwfs_open;
   66 static vop_close_t      nwfs_close;
   67 static vop_access_t     nwfs_access;
   68 static vop_getattr_t    nwfs_getattr;
   69 static vop_setattr_t    nwfs_setattr;
   70 static vop_read_t       nwfs_read;
   71 static vop_write_t      nwfs_write;
   72 static vop_fsync_t      nwfs_fsync;
   73 static vop_remove_t     nwfs_remove;
   74 static vop_link_t       nwfs_link;
   75 static vop_lookup_t     nwfs_lookup;
   76 static vop_rename_t     nwfs_rename;
   77 static vop_mkdir_t      nwfs_mkdir;
   78 static vop_rmdir_t      nwfs_rmdir;
   79 static vop_symlink_t    nwfs_symlink;
   80 static vop_readdir_t    nwfs_readdir;
   81 static vop_strategy_t   nwfs_strategy;
   82 static vop_print_t      nwfs_print;
   83 static vop_pathconf_t   nwfs_pathconf;
   84 
   85 /* Global vfs data structures for nwfs */
   86 struct vop_vector nwfs_vnodeops = {
   87         .vop_default =          &default_vnodeops,
   88 
   89         .vop_access =           nwfs_access,
   90         .vop_close =            nwfs_close,
   91         .vop_create =           nwfs_create,
   92         .vop_fsync =            nwfs_fsync,
   93         .vop_getattr =          nwfs_getattr,
   94         .vop_getpages =         nwfs_getpages,
   95         .vop_inactive =         nwfs_inactive,
   96         .vop_ioctl =            nwfs_ioctl,
   97         .vop_link =             nwfs_link,
   98         .vop_lookup =           nwfs_lookup,
   99         .vop_mkdir =            nwfs_mkdir,
  100         .vop_mknod =            nwfs_mknod,
  101         .vop_open =             nwfs_open,
  102         .vop_pathconf =         nwfs_pathconf,
  103         .vop_print =            nwfs_print,
  104         .vop_putpages =         nwfs_putpages,
  105         .vop_read =             nwfs_read,
  106         .vop_readdir =          nwfs_readdir,
  107         .vop_reclaim =          nwfs_reclaim,
  108         .vop_remove =           nwfs_remove,
  109         .vop_rename =           nwfs_rename,
  110         .vop_rmdir =            nwfs_rmdir,
  111         .vop_setattr =          nwfs_setattr,
  112         .vop_strategy =         nwfs_strategy,
  113         .vop_symlink =          nwfs_symlink,
  114         .vop_write =            nwfs_write,
  115 };
  116 
  117 /*
  118  * nwfs_access vnode op
  119  */
  120 static int
  121 nwfs_access(ap)
  122         struct vop_access_args /* {
  123                 struct vnode *a_vp;
  124                 accmode_t a_accmode;
  125                 struct ucred *a_cred;
  126                 struct thread *td;
  127         } */ *ap;
  128 {
  129         struct vnode *vp = ap->a_vp;
  130         mode_t mpmode;
  131         struct nwmount *nmp = VTONWFS(vp);
  132 
  133         NCPVNDEBUG("\n");
  134         if ((ap->a_accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
  135                 switch (vp->v_type) {
  136                     case VREG: case VDIR: case VLNK:
  137                         return (EROFS);
  138                     default:
  139                         break;
  140                 }
  141         }
  142         mpmode = vp->v_type == VREG ? nmp->m.file_mode :
  143             nmp->m.dir_mode;
  144         return (vaccess(vp->v_type, mpmode, nmp->m.uid,
  145             nmp->m.gid, ap->a_accmode, ap->a_cred, NULL));
  146 }
  147 /*
  148  * nwfs_open vnode op
  149  */
  150 /* ARGSUSED */
  151 static int
  152 nwfs_open(ap)
  153         struct vop_open_args /* {
  154                 struct vnode *a_vp;
  155                 int  a_mode;
  156                 struct ucred *a_cred;
  157                 struct thread *td;
  158         } */ *ap;
  159 {
  160         struct vnode *vp = ap->a_vp;
  161         int mode = ap->a_mode;
  162         struct nwnode *np = VTONW(vp);
  163         struct ncp_open_info no;
  164         struct nwmount *nmp = VTONWFS(vp);
  165         struct vattr vattr;
  166         int error, nwm;
  167 
  168         NCPVNDEBUG("%s,%d\n", np->n_name, np->opened);
  169         if (vp->v_type != VREG && vp->v_type != VDIR) { 
  170                 NCPFATAL("open vtype = %d\n", vp->v_type);
  171                 return (EACCES);
  172         }
  173         if (vp->v_type == VDIR) return 0;       /* nothing to do now */
  174         if (np->n_flag & NMODIFIED) {
  175                 if ((error = nwfs_vinvalbuf(vp, ap->a_td)) == EINTR)
  176                         return (error);
  177                 np->n_atime = 0;
  178                 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
  179                 if (error) return (error);
  180                 np->n_mtime = vattr.va_mtime.tv_sec;
  181         } else {
  182                 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
  183                 if (error) return (error);
  184                 if (np->n_mtime != vattr.va_mtime.tv_sec) {
  185                         if ((error = nwfs_vinvalbuf(vp, ap->a_td)) == EINTR)
  186                                 return (error);
  187                         np->n_mtime = vattr.va_mtime.tv_sec;
  188                 }
  189         }
  190         if (np->opened) {
  191                 np->opened++;
  192                 return 0;
  193         }
  194         nwm = AR_READ;
  195         if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
  196                 nwm |= AR_WRITE;
  197         error = ncp_open_create_file_or_subdir(nmp, vp, 0, NULL, OC_MODE_OPEN,
  198                                                0, nwm, &no, ap->a_td, ap->a_cred);
  199         if (error) {
  200                 if (mode & FWRITE)
  201                         return EACCES;
  202                 nwm = AR_READ;
  203                 error = ncp_open_create_file_or_subdir(nmp, vp, 0, NULL, OC_MODE_OPEN, 0,
  204                                                    nwm, &no, ap->a_td, ap->a_cred);
  205         }
  206         if (!error) {
  207                 np->opened++;
  208                 np->n_fh = no.fh;
  209                 np->n_origfh = no.origfh;
  210         }
  211         np->n_atime = 0;
  212         return (error);
  213 }
  214 
  215 static int
  216 nwfs_close(ap)
  217         struct vop_close_args /* {
  218                 struct vnodeop_desc *a_desc;
  219                 struct vnode *a_vp;
  220                 int  a_fflag;
  221                 struct ucred *a_cred;
  222                 struct thread *td;
  223         } */ *ap;
  224 {
  225         struct vnode *vp = ap->a_vp;
  226         struct nwnode *np = VTONW(vp);
  227         int error;
  228 
  229         NCPVNDEBUG("name=%s,pid=%d,c=%d\n", np->n_name, ap->a_td->td_proc->p_pid,
  230                         np->opened);
  231 
  232         if (vp->v_type == VDIR) return 0;       /* nothing to do now */
  233         error = 0;
  234         mtx_lock(&vp->v_interlock);
  235         if (np->opened == 0) {
  236                 mtx_unlock(&vp->v_interlock);
  237                 return 0;
  238         }
  239         mtx_unlock(&vp->v_interlock);
  240         error = nwfs_vinvalbuf(vp, ap->a_td);
  241         mtx_lock(&vp->v_interlock);
  242         if (np->opened == 0) {
  243                 mtx_unlock(&vp->v_interlock);
  244                 return 0;
  245         }
  246         if (--np->opened == 0) {
  247                 mtx_unlock(&vp->v_interlock);
  248                 error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh, 
  249                    ap->a_td, ap->a_cred);
  250         } else
  251                 mtx_unlock(&vp->v_interlock);
  252         np->n_atime = 0;
  253         return (error);
  254 }
  255 
  256 /*
  257  * nwfs_getattr call from vfs.
  258  */
  259 static int
  260 nwfs_getattr(ap)
  261         struct vop_getattr_args /* {
  262                 struct vnode *a_vp;
  263                 struct vattr *a_vap;
  264                 struct ucred *a_cred;
  265         } */ *ap;
  266 {
  267         struct vnode *vp = ap->a_vp;
  268         struct nwnode *np = VTONW(vp);
  269         struct vattr *va=ap->a_vap;
  270         struct nwmount *nmp = VTONWFS(vp);
  271         struct thread *td = curthread;
  272         struct nw_entry_info fattr;
  273         int error;
  274         u_int32_t oldsize;
  275 
  276         NCPVNDEBUG("%lx:%d: '%s' %d\n", (long)vp, nmp->n_volume, np->n_name, (vp->v_vflag & VV_ROOT) != 0);
  277         error = nwfs_attr_cachelookup(vp, va);
  278         if (!error) return 0;
  279         NCPVNDEBUG("not in cache\n");
  280         oldsize = np->n_size;
  281         if (np->n_flag & NVOLUME) {
  282                 error = ncp_obtain_info(nmp, np->n_fid.f_id, 0, NULL, &fattr,
  283                     td, ap->a_cred);
  284         } else {
  285                 error = ncp_obtain_info(nmp, np->n_fid.f_parent, np->n_nmlen, 
  286                     np->n_name, &fattr, td, ap->a_cred);
  287         }
  288         if (error) {
  289                 NCPVNDEBUG("error %d\n", error);
  290                 return error;
  291         }
  292         nwfs_attr_cacheenter(vp, &fattr);
  293         *va = np->n_vattr;
  294         if (np->opened)
  295                 np->n_size = oldsize;
  296         return (0);
  297 }
  298 /*
  299  * nwfs_setattr call from vfs.
  300  */
  301 static int
  302 nwfs_setattr(ap)
  303         struct vop_setattr_args /* {
  304                 struct vnode *a_vp;
  305                 struct vattr *a_vap;
  306                 struct ucred *a_cred;
  307         } */ *ap;
  308 {
  309         struct vnode *vp = ap->a_vp;
  310         struct nwnode *np = VTONW(vp);
  311         struct vattr *vap = ap->a_vap;
  312         u_quad_t tsize=0;
  313         int error = 0;
  314 
  315         NCPVNDEBUG("\n");
  316         if (vap->va_flags != VNOVAL)
  317                 return (EOPNOTSUPP);
  318         /*
  319          * Disallow write attempts if the filesystem is mounted read-only.
  320          */
  321         if ((vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL || 
  322              vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
  323              vap->va_mode != (mode_t)VNOVAL) &&(vp->v_mount->mnt_flag & MNT_RDONLY))
  324                 return (EROFS);
  325         if (vap->va_size != VNOVAL) {
  326                 switch (vp->v_type) {
  327                 case VDIR:
  328                         return (EISDIR);
  329                 case VREG:
  330                         /*
  331                          * Disallow write attempts if the filesystem is
  332                          * mounted read-only.
  333                          */
  334                         if (vp->v_mount->mnt_flag & MNT_RDONLY)
  335                                 return (EROFS);
  336                         vnode_pager_setsize(vp, (u_long)vap->va_size);
  337                         tsize = np->n_size;
  338                         np->n_size = vap->va_size;
  339                         break;
  340                 default:
  341                         return EINVAL;
  342                 };
  343         }
  344         error = ncp_setattr(vp, vap, ap->a_cred, curthread);
  345         if (error && vap->va_size != VNOVAL) {
  346                 np->n_size = tsize;
  347                 vnode_pager_setsize(vp, (u_long)tsize);
  348         }
  349         np->n_atime = 0;        /* invalidate cache */
  350         VOP_GETATTR(vp, vap, ap->a_cred);
  351         np->n_mtime = vap->va_mtime.tv_sec;
  352         return (0);
  353 }
  354 /*
  355  * nwfs_read call.
  356  */
  357 static int
  358 nwfs_read(ap)
  359         struct vop_read_args /* {
  360                 struct vnode *a_vp;
  361                 struct uio *a_uio;
  362                 int  a_ioflag;
  363                 struct ucred *a_cred;
  364         } */ *ap;
  365 {
  366         struct vnode *vp = ap->a_vp;
  367         struct uio *uio=ap->a_uio;
  368         int error;
  369         NCPVNDEBUG("nwfs_read:\n");
  370 
  371         if (vp->v_type != VREG && vp->v_type != VDIR)
  372                 return (EPERM);
  373         error = nwfs_readvnode(vp, uio, ap->a_cred);
  374         return error;
  375 }
  376 
  377 static int
  378 nwfs_write(ap)
  379         struct vop_write_args /* {
  380                 struct vnode *a_vp;
  381                 struct uio *a_uio;
  382                 int  a_ioflag;
  383                 struct ucred *a_cred;
  384         } */ *ap;
  385 {
  386         struct vnode *vp = ap->a_vp;
  387         struct uio *uio = ap->a_uio;
  388         int error;
  389 
  390         NCPVNDEBUG("%d,ofs=%d,sz=%d\n", vp->v_type, (int)uio->uio_offset, uio->uio_resid);
  391 
  392         if (vp->v_type != VREG)
  393                 return (EPERM);
  394         error = nwfs_writevnode(vp, uio, ap->a_cred, ap->a_ioflag);
  395         return(error);
  396 }
  397 /*
  398  * nwfs_create call
  399  * Create a regular file. On entry the directory to contain the file being
  400  * created is locked.  We must release before we return. We must also free
  401  * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
  402  * only if the SAVESTART bit in cn_flags is clear on success.
  403  */
  404 static int
  405 nwfs_create(ap)
  406         struct vop_create_args /* {
  407                 struct vnode *a_dvp;
  408                 struct vnode **a_vpp;
  409                 struct componentname *a_cnp;
  410                 struct vattr *a_vap;
  411         } */ *ap;
  412 {
  413         struct vnode *dvp = ap->a_dvp;
  414         struct vattr *vap = ap->a_vap;
  415         struct vnode **vpp=ap->a_vpp;
  416         struct componentname *cnp = ap->a_cnp;
  417         struct vnode *vp = (struct vnode *)0;
  418         int error = 0, fmode;
  419         struct vattr vattr;
  420         struct nwnode *np;
  421         struct ncp_open_info no;
  422         struct nwmount *nmp=VTONWFS(dvp);
  423         ncpfid fid;
  424         
  425 
  426         NCPVNDEBUG("\n");
  427         *vpp = NULL;
  428         if (vap->va_type == VSOCK)
  429                 return (EOPNOTSUPP);
  430         if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
  431                 return (error);
  432         fmode = AR_READ | AR_WRITE;
  433 /*      if (vap->va_vaflags & VA_EXCLUSIVE)
  434                 fmode |= AR_DENY_READ | AR_DENY_WRITE;*/
  435         
  436         error = ncp_open_create_file_or_subdir(nmp, dvp, cnp->cn_namelen, cnp->cn_nameptr, 
  437                            OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE,
  438                            0, fmode, &no, cnp->cn_thread, cnp->cn_cred);
  439         if (!error) {
  440                 error = ncp_close_file(NWFSTOCONN(nmp), &no.fh, cnp->cn_thread, cnp->cn_cred);
  441                 fid.f_parent = VTONW(dvp)->n_fid.f_id;
  442                 fid.f_id = no.fattr.dirEntNum;
  443                 error = nwfs_nget(VTOVFS(dvp), fid, &no.fattr, dvp, &vp);
  444                 if (!error) {
  445                         np = VTONW(vp);
  446                         np->opened = 0;
  447                         *vpp = vp;
  448                 }
  449                 if (cnp->cn_flags & MAKEENTRY)
  450                         cache_enter(dvp, vp, cnp);
  451         }
  452         return (error);
  453 }
  454 
  455 /*
  456  * nwfs_remove call. It isn't possible to emulate UFS behaivour because
  457  * NetWare doesn't allow delete/rename operations on an opened file.
  458  */
  459 static int
  460 nwfs_remove(ap)
  461         struct vop_remove_args /* {
  462                 struct vnodeop_desc *a_desc;
  463                 struct vnode * a_dvp;
  464                 struct vnode * a_vp;
  465                 struct componentname * a_cnp;
  466         } */ *ap;
  467 {
  468         struct vnode *vp = ap->a_vp;
  469         struct vnode *dvp = ap->a_dvp;
  470         struct componentname *cnp = ap->a_cnp;
  471         struct nwnode *np = VTONW(vp);
  472         struct nwmount *nmp = VTONWFS(vp);
  473         int error;
  474 
  475         if (vp->v_type == VDIR || np->opened || vrefcnt(vp) != 1)
  476                 return EPERM;
  477         cache_purge(vp);
  478         error = ncp_DeleteNSEntry(nmp, VTONW(dvp)->n_fid.f_id,
  479             cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_thread, cnp->cn_cred);
  480         if (error == 0)
  481                 np->n_flag |= NSHOULDFREE;
  482         else if (error == 0x899c)
  483                 error = EACCES;
  484         return (error);
  485 }
  486 
  487 /*
  488  * nwfs_file rename call
  489  */
  490 static int
  491 nwfs_rename(ap)
  492         struct vop_rename_args  /* {
  493                 struct vnode *a_fdvp;
  494                 struct vnode *a_fvp;
  495                 struct componentname *a_fcnp;
  496                 struct vnode *a_tdvp;
  497                 struct vnode *a_tvp;
  498                 struct componentname *a_tcnp;
  499         } */ *ap;
  500 {
  501         struct vnode *fvp = ap->a_fvp;
  502         struct vnode *tvp = ap->a_tvp;
  503         struct vnode *fdvp = ap->a_fdvp;
  504         struct vnode *tdvp = ap->a_tdvp;
  505         struct componentname *tcnp = ap->a_tcnp;
  506         struct componentname *fcnp = ap->a_fcnp;
  507         struct nwmount *nmp=VTONWFS(fvp);
  508         u_int16_t oldtype = 6;
  509         int error=0;
  510 
  511         /* Check for cross-device rename */
  512         if ((fvp->v_mount != tdvp->v_mount) ||
  513             (tvp && (fvp->v_mount != tvp->v_mount))) {
  514                 error = EXDEV;
  515                 goto out;
  516         }
  517 
  518         if (tvp && vrefcnt(tvp) > 1) {
  519                 error = EBUSY;
  520                 goto out;
  521         }
  522         if (fvp->v_type == VDIR) {
  523                 oldtype |= NW_TYPE_SUBDIR;
  524         } else if (fvp->v_type == VREG) {
  525                 oldtype |= NW_TYPE_FILE;
  526         } else {
  527                 error = EINVAL;
  528                 goto out;
  529         }
  530         if (tvp && tvp != fvp) {
  531                 error = ncp_DeleteNSEntry(nmp, VTONW(tdvp)->n_fid.f_id,
  532                     tcnp->cn_namelen, tcnp->cn_nameptr, 
  533                     tcnp->cn_thread, tcnp->cn_cred);
  534                 if (error == 0x899c) error = EACCES;
  535                 if (error)
  536                         goto out_cacherem;
  537         }
  538         error = ncp_nsrename(NWFSTOCONN(nmp), nmp->n_volume, nmp->name_space, 
  539                 oldtype, &nmp->m.nls,
  540                 VTONW(fdvp)->n_fid.f_id, fcnp->cn_nameptr, fcnp->cn_namelen,
  541                 VTONW(tdvp)->n_fid.f_id, tcnp->cn_nameptr, tcnp->cn_namelen,
  542                 tcnp->cn_thread, tcnp->cn_cred);
  543 
  544         if (error == 0x8992)
  545                 error = EEXIST;
  546         if (fvp->v_type == VDIR) {
  547                 if (tvp != NULL && tvp->v_type == VDIR)
  548                         cache_purge(tdvp);
  549                 cache_purge(fdvp);
  550         }
  551 out_cacherem:
  552         nwfs_attr_cacheremove(fdvp);
  553         nwfs_attr_cacheremove(tdvp);
  554         nwfs_attr_cacheremove(fvp);
  555 out:
  556         if (tdvp == tvp)
  557                 vrele(tdvp);
  558         else
  559                 vput(tdvp);
  560         if (tvp)
  561                 vput(tvp);
  562         vrele(fdvp);
  563         vrele(fvp);
  564         if (tvp)
  565                 nwfs_attr_cacheremove(tvp);
  566         /*
  567          * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
  568          */
  569         if (error == ENOENT)
  570                 error = 0;
  571         return (error);
  572 }
  573 
  574 /*
  575  * nwfs hard link create call
  576  * Netware filesystems don't know what links are.
  577  */
  578 static int
  579 nwfs_link(ap)
  580         struct vop_link_args /* {
  581                 struct vnode *a_tdvp;
  582                 struct vnode *a_vp;
  583                 struct componentname *a_cnp;
  584         } */ *ap;
  585 {
  586         return EOPNOTSUPP;
  587 }
  588 
  589 /*
  590  * nwfs_symlink link create call
  591  * Netware filesystems don't know what symlinks are.
  592  */
  593 static int
  594 nwfs_symlink(ap)
  595         struct vop_symlink_args /* {
  596                 struct vnode *a_dvp;
  597                 struct vnode **a_vpp;
  598                 struct componentname *a_cnp;
  599                 struct vattr *a_vap;
  600                 char *a_target;
  601         } */ *ap;
  602 {
  603         return (EOPNOTSUPP);
  604 }
  605 
  606 static int nwfs_mknod(ap) 
  607         struct vop_mknod_args /* {
  608         } */ *ap;
  609 {
  610         return (EOPNOTSUPP);
  611 }
  612 
  613 /*
  614  * nwfs_mkdir call
  615  */
  616 static int
  617 nwfs_mkdir(ap)
  618         struct vop_mkdir_args /* {
  619                 struct vnode *a_dvp;
  620                 struct vnode **a_vpp;
  621                 struct componentname *a_cnp;
  622                 struct vattr *a_vap;
  623         } */ *ap;
  624 {
  625         struct vnode *dvp = ap->a_dvp;
  626 /*      struct vattr *vap = ap->a_vap;*/
  627         struct componentname *cnp = ap->a_cnp;
  628         int len=cnp->cn_namelen;
  629         struct ncp_open_info no;
  630         struct vnode *newvp = (struct vnode *)0;
  631         ncpfid fid;
  632         int error = 0;
  633         struct vattr vattr;
  634         char *name=cnp->cn_nameptr;
  635 
  636         if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
  637                 return (error);
  638         if ((name[0] == '.') && ((len == 1) || ((len == 2) && (name[1] == '.')))) {
  639                 return EEXIST;
  640         }
  641         if (ncp_open_create_file_or_subdir(VTONWFS(dvp), dvp, cnp->cn_namelen,
  642                         cnp->cn_nameptr, OC_MODE_CREATE, aDIR, 0xffff,
  643                         &no, cnp->cn_thread, cnp->cn_cred) != 0) {
  644                 error = EACCES;
  645         } else {
  646                 error = 0;
  647         }
  648         if (!error) {
  649                 fid.f_parent = VTONW(dvp)->n_fid.f_id;
  650                 fid.f_id = no.fattr.dirEntNum;
  651                 error = nwfs_nget(VTOVFS(dvp), fid, &no.fattr, dvp, &newvp);
  652                 if (!error) {
  653                         newvp->v_type = VDIR;
  654                         *ap->a_vpp = newvp;
  655                 }
  656         }
  657         return (error);
  658 }
  659 
  660 /*
  661  * nwfs_remove directory call
  662  */
  663 static int
  664 nwfs_rmdir(ap)
  665         struct vop_rmdir_args /* {
  666                 struct vnode *a_dvp;
  667                 struct vnode *a_vp;
  668                 struct componentname *a_cnp;
  669         } */ *ap;
  670 {
  671         struct vnode *vp = ap->a_vp;
  672         struct vnode *dvp = ap->a_dvp;
  673         struct componentname *cnp = ap->a_cnp;
  674         struct nwnode *np = VTONW(vp);
  675         struct nwmount *nmp = VTONWFS(vp);
  676         struct nwnode *dnp = VTONW(dvp);
  677         int error = EIO;
  678 
  679         if (dvp == vp)
  680                 return EINVAL;
  681 
  682         error = ncp_DeleteNSEntry(nmp, dnp->n_fid.f_id, 
  683                 cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_thread, cnp->cn_cred);
  684         if (error == 0)
  685                 np->n_flag |= NSHOULDFREE;
  686         else if (error == NWE_DIR_NOT_EMPTY)
  687                 error = ENOTEMPTY;
  688         dnp->n_flag |= NMODIFIED;
  689         nwfs_attr_cacheremove(dvp);
  690         cache_purge(dvp);
  691         cache_purge(vp);
  692         return (error);
  693 }
  694 
  695 /*
  696  * nwfs_readdir call
  697  */
  698 static int
  699 nwfs_readdir(ap)
  700         struct vop_readdir_args /* {
  701                 struct vnode *a_vp;
  702                 struct uio *a_uio;
  703                 struct ucred *a_cred;
  704                 int *a_eofflag;
  705                 u_long *a_cookies;
  706                 int a_ncookies;
  707         } */ *ap;
  708 {
  709         struct vnode *vp = ap->a_vp;
  710         struct uio *uio = ap->a_uio;
  711         int error;
  712 
  713         if (vp->v_type != VDIR)
  714                 return (EPERM);
  715         if (ap->a_ncookies) {
  716                 printf("nwfs_readdir: no support for cookies now...");
  717                 return (EOPNOTSUPP);
  718         }
  719 
  720         error = nwfs_readvnode(vp, uio, ap->a_cred);
  721         return error;
  722 }
  723 /* ARGSUSED */
  724 static int
  725 nwfs_fsync(ap)
  726         struct vop_fsync_args /* {
  727                 struct vnodeop_desc *a_desc;
  728                 struct vnode * a_vp;
  729                 struct ucred * a_cred;
  730                 int  a_waitfor;
  731                 struct thread *a_td;
  732         } */ *ap;
  733 {
  734 /*      return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));*/
  735     return (0);
  736 }
  737 
  738 /* ARGSUSED */
  739 static 
  740 int nwfs_print (ap) 
  741         struct vop_print_args /* {
  742                 struct vnode *a_vp;
  743         } */ *ap;
  744 {
  745         struct vnode *vp = ap->a_vp;
  746         struct nwnode *np = VTONW(vp);
  747 
  748         printf("\tnwfs node: name = '%s', fid = %d, pfid = %d\n",
  749             np->n_name, np->n_fid.f_id, np->n_fid.f_parent);
  750         return (0);
  751 }
  752 
  753 static int nwfs_pathconf (ap)
  754         struct vop_pathconf_args  /* {
  755         struct vnode *vp;
  756         int name;
  757         register_t *retval;
  758         } */ *ap;
  759 {
  760         int name=ap->a_name, error=0;
  761         register_t *retval=ap->a_retval;
  762         
  763         switch(name){
  764                 case _PC_LINK_MAX:
  765                         *retval=0;
  766                         break;
  767                 case _PC_NAME_MAX:
  768                         *retval=NCP_MAX_FILENAME; /* XXX from nwfsnode */
  769                         break;
  770                 case _PC_PATH_MAX:
  771                         *retval=NCP_MAXPATHLEN; /* XXX from nwfsnode */
  772                         break;
  773                 default:
  774                         error=EINVAL;
  775         }
  776         return(error);
  777 }
  778 
  779 static int nwfs_strategy (ap) 
  780         struct vop_strategy_args /* {
  781         struct buf *a_bp
  782         } */ *ap;
  783 {
  784         struct buf *bp=ap->a_bp;
  785         struct ucred *cr;
  786         struct thread *td;
  787 
  788         NCPVNDEBUG("\n");
  789         if (bp->b_flags & B_ASYNC)
  790                 td = (struct thread *)0;
  791         else
  792                 td = curthread; /* XXX */
  793         if (bp->b_iocmd == BIO_READ)
  794                 cr = bp->b_rcred;
  795         else
  796                 cr = bp->b_wcred;
  797         /*
  798          * If the op is asynchronous and an i/o daemon is waiting
  799          * queue the request, wake it up and wait for completion
  800          * otherwise just do it ourselves.
  801          */
  802         if ((bp->b_flags & B_ASYNC) == 0 )
  803                 (void)nwfs_doio(ap->a_vp, bp, cr, td);
  804         return (0);
  805 }
  806 
  807 
  808 /*
  809  * How to keep the brain busy ...
  810  * Currently lookup routine can make two lookup for vnode. This can be
  811  * avoided by reorg the code.
  812  */
  813 int
  814 nwfs_lookup(ap)
  815         struct vop_lookup_args /* {
  816                 struct vnodeop_desc *a_desc;
  817                 struct vnode *a_dvp;
  818                 struct vnode **a_vpp;
  819                 struct componentname *a_cnp;
  820         } */ *ap;
  821 {
  822         struct componentname *cnp = ap->a_cnp;
  823         struct vnode *dvp = ap->a_dvp;
  824         struct vnode **vpp = ap->a_vpp;
  825         int flags = cnp->cn_flags;
  826         struct vnode *vp;
  827         struct nwmount *nmp;
  828         struct mount *mp = dvp->v_mount;
  829         struct nwnode *dnp, *npp;
  830         struct nw_entry_info fattr, *fap;
  831         ncpfid fid;
  832         int nameiop=cnp->cn_nameiop, islastcn;
  833         int error = 0, notfound;
  834         struct thread *td = cnp->cn_thread;
  835         char _name[cnp->cn_namelen+1];
  836         bcopy(cnp->cn_nameptr, _name, cnp->cn_namelen);
  837         _name[cnp->cn_namelen]=0;
  838         
  839         if (dvp->v_type != VDIR)
  840                 return (ENOTDIR);
  841         if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) {
  842                 printf("nwfs_lookup: invalid '..'\n");
  843                 return EIO;
  844         }
  845 
  846         NCPVNDEBUG("%d '%s' in '%s' id=d\n", nameiop, _name, 
  847                 VTONW(dvp)->n_name/*, VTONW(dvp)->n_name*/);
  848 
  849         islastcn = flags & ISLASTCN;
  850         if (islastcn && (mp->mnt_flag & MNT_RDONLY) && (nameiop != LOOKUP))
  851                 return (EROFS);
  852         if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)))
  853                 return (error);
  854         nmp = VFSTONWFS(mp);
  855         dnp = VTONW(dvp);
  856 /*
  857 printf("dvp %d:%d:%d\n", (int)mp, (int)dvp->v_vflag & VV_ROOT, (int)flags & ISDOTDOT);
  858 */
  859         error = ncp_pathcheck(cnp->cn_nameptr, cnp->cn_namelen, &nmp->m.nls, 
  860             (nameiop == CREATE || nameiop == RENAME) && (nmp->m.nls.opt & NWHP_NOSTRICT) == 0);
  861         if (error) 
  862             return ENOENT;
  863 
  864         error = cache_lookup(dvp, vpp, cnp);
  865         NCPVNDEBUG("cache_lookup returned %d\n", error);
  866         if (error > 0)
  867                 return error;
  868         if (error) {            /* name was found */
  869                 struct vattr vattr;
  870 
  871                 vp = *vpp;
  872                 if (!VOP_GETATTR(vp, &vattr, cnp->cn_cred) &&
  873                     vattr.va_ctime.tv_sec == VTONW(vp)->n_ctime) {
  874                         if (nameiop != LOOKUP && islastcn)
  875                                 cnp->cn_flags |= SAVENAME;
  876                         NCPVNDEBUG("use cached vnode");
  877                         return (0);
  878                 }
  879                 cache_purge(vp);
  880                 if (vp != dvp)
  881                         vput(vp);
  882                 else
  883                         vrele(vp);
  884                 *vpp = NULLVP;
  885         }
  886         /* not in cache, so ...  */
  887         error = 0;
  888         *vpp = NULLVP;
  889         fap = NULL;
  890         if (flags & ISDOTDOT) {
  891                 if (NWCMPF(&dnp->n_parent, &nmp->n_rootent)) {
  892                         fid = nmp->n_rootent;
  893                         fap = NULL;
  894                         notfound = 0;
  895                 } else {
  896                         error = nwfs_lookupnp(nmp, dnp->n_parent, td, &npp);
  897                         if (error) {
  898                                 return error;
  899                         }
  900                         fid = dnp->n_parent;
  901                         fap = &fattr;
  902                         /*np = *npp;*/
  903                         notfound = ncp_obtain_info(nmp, npp->n_dosfid,
  904                             0, NULL, fap, td, cnp->cn_cred);
  905                 }
  906         } else {
  907                 fap = &fattr;
  908                 notfound = ncp_lookup(dvp, cnp->cn_namelen, cnp->cn_nameptr,
  909                         fap, td, cnp->cn_cred);
  910                 fid.f_id = fap->dirEntNum;
  911                 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
  912                         fid.f_parent = dnp->n_fid.f_parent;
  913                 } else
  914                         fid.f_parent = dnp->n_fid.f_id;
  915                 NCPVNDEBUG("call to ncp_lookup returned=%d\n", notfound);
  916         }
  917         if (notfound && notfound < 0x80 )
  918                 return (notfound);      /* hard error */
  919         if (notfound) { /* entry not found */
  920                 /* Handle RENAME or CREATE case... */
  921                 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
  922                         cnp->cn_flags |= SAVENAME;
  923                         return (EJUSTRETURN);
  924                 }
  925                 return ENOENT;
  926         }/* else {
  927                 NCPVNDEBUG("Found entry %s with id=%d\n", fap->entryName, fap->dirEntNum);
  928         }*/
  929         /* handle DELETE case ... */
  930         if (nameiop == DELETE && islastcn) {    /* delete last component */
  931                 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, cnp->cn_thread);
  932                 if (error) return (error);
  933                 if (NWCMPF(&dnp->n_fid, &fid)) {        /* we found ourselfs */
  934                         VREF(dvp);
  935                         *vpp = dvp;
  936                         return 0;
  937                 }
  938                 error = nwfs_nget(mp, fid, fap, dvp, &vp);
  939                 if (error) return (error);
  940                 *vpp = vp;
  941                 cnp->cn_flags |= SAVENAME;      /* I free it later */
  942                 return (0);
  943         }
  944         if (nameiop == RENAME && islastcn) {
  945                 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, cnp->cn_thread);
  946                 if (error) return (error);
  947                 if (NWCMPF(&dnp->n_fid, &fid)) return EISDIR;
  948                 error = nwfs_nget(mp, fid, fap, dvp, &vp);
  949                 if (error) return (error);
  950                 *vpp = vp;
  951                 cnp->cn_flags |= SAVENAME;
  952                 return (0);
  953         }
  954         if (flags & ISDOTDOT) {
  955                 VOP_UNLOCK(dvp, 0);             /* race to get the inode */
  956                 error = nwfs_nget(mp, fid, NULL, NULL, &vp);
  957                 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
  958                 if (error)
  959                         return (error);
  960                 *vpp = vp;
  961         } else if (NWCMPF(&dnp->n_fid, &fid)) {
  962                 vref(dvp);
  963                 *vpp = dvp;
  964         } else {
  965                 error = nwfs_nget(mp, fid, fap, dvp, &vp);
  966                 if (error) return (error);
  967                 *vpp = vp;
  968                 NCPVNDEBUG("lookup: getnewvp!\n");
  969         }
  970         if ((cnp->cn_flags & MAKEENTRY)/* && !islastcn*/) {
  971                 VTONW(*vpp)->n_ctime = VTONW(*vpp)->n_vattr.va_ctime.tv_sec;
  972                 cache_enter(dvp, *vpp, cnp);
  973         }
  974         return (0);
  975 }

Cache object: 010a3fc17de15e9fbbf5fc5106c418d8


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