portal_vfsops.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*
    2  * Copyright (c) 1992, 1993, 1995
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software donated to Berkeley by
    6  * Jan-Simon Pendry.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by the University of
   19  *      California, Berkeley and its contributors.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      @(#)portal_vfsops.c     8.11 (Berkeley) 5/14/95
   37  *
   38  * $FreeBSD: releng/5.0/sys/fs/portalfs/portal_vfsops.c 104565 2002-10-06 11:45:22Z mux $
   39  */
   40 
   41 /*
   42  * Portal Filesystem
   43  */
   44 
   45 #include <sys/param.h>
   46 #include <sys/systm.h>
   47 #include <sys/domain.h>
   48 #include <sys/filedesc.h>
   49 #include <sys/kernel.h>
   50 #include <sys/lock.h>
   51 #include <sys/mutex.h>
   52 #include <sys/malloc.h>
   53 #include <sys/file.h>           /* Must come after sys/malloc.h */
   54 #include <sys/mount.h>
   55 #include <sys/proc.h>
   56 #include <sys/protosw.h>
   57 #include <sys/socket.h>
   58 #include <sys/socketvar.h>
   59 #include <sys/vnode.h>
   60 
   61 #include <fs/portalfs/portal.h>
   62 
   63 static MALLOC_DEFINE(M_PORTALFSMNT, "PORTAL mount", "PORTAL mount structure");
   64 
   65 static int      portal_mount(struct mount *mp, char *path, caddr_t data,
   66                                   struct nameidata *ndp, struct thread *td);
   67 static int      portal_unmount(struct mount *mp, int mntflags,
   68                                     struct thread *td);
   69 static int      portal_root(struct mount *mp, struct vnode **vpp);
   70 static int      portal_statfs(struct mount *mp, struct statfs *sbp,
   71                                    struct thread *td);
   72 
   73 /*
   74  * Mount the per-process file descriptors (/dev/fd)
   75  */
   76 static int
   77 portal_mount(mp, path, data, ndp, td)
   78         struct mount *mp;
   79         char *path;
   80         caddr_t data;
   81         struct nameidata *ndp;
   82         struct thread *td;
   83 {
   84         struct file *fp;
   85         struct portal_args args;
   86         struct portalmount *fmp;
   87         struct socket *so;
   88         struct vnode *rvp;
   89         struct portalnode *pn;
   90         size_t size;
   91         int error;
   92 
   93         /*
   94          * Update is a no-op
   95          */
   96         if (mp->mnt_flag & MNT_UPDATE)
   97                 return (EOPNOTSUPP);
   98 
   99         error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
  100         if (error)
  101                 return (error);
  102 
  103         if ((error = fget(td, args.pa_socket, &fp)) != 0)
  104                 return (error);
  105         if (fp->f_type != DTYPE_SOCKET) {
  106                 fdrop(fp, td);
  107                 return(ENOTSOCK);
  108         }
  109         so = (struct socket *) fp->f_data;      /* XXX race against userland */
  110         if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
  111                 fdrop(fp, td);
  112                 return (ESOCKTNOSUPPORT);
  113         }
  114 
  115         MALLOC(pn, struct portalnode *, sizeof(struct portalnode),
  116                 M_TEMP, M_WAITOK);
  117 
  118         MALLOC(fmp, struct portalmount *, sizeof(struct portalmount),
  119                 M_PORTALFSMNT, M_WAITOK);       /* XXX */
  120 
  121         error = getnewvnode("portal", mp, portal_vnodeop_p, &rvp); /* XXX */
  122         if (error) {
  123                 FREE(fmp, M_PORTALFSMNT);
  124                 FREE(pn, M_TEMP);
  125                 fdrop(fp, td);
  126                 return (error);
  127         }
  128 
  129         rvp->v_data = pn;
  130         rvp->v_type = VDIR;
  131         rvp->v_vflag |= VV_ROOT;
  132         VTOPORTAL(rvp)->pt_arg = 0;
  133         VTOPORTAL(rvp)->pt_size = 0;
  134         VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
  135         fmp->pm_root = rvp;
  136         fhold(fp);
  137         fmp->pm_server = fp;
  138 
  139         mp->mnt_flag |= MNT_LOCAL;
  140         mp->mnt_data = (qaddr_t) fmp;
  141         vfs_getnewfsid(mp);
  142 
  143         (void)copyinstr(args.pa_config,
  144             mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
  145         bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
  146 
  147 #ifdef notdef
  148         bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
  149         bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
  150 #endif
  151 
  152         (void)portal_statfs(mp, &mp->mnt_stat, td);
  153         fdrop(fp, td);
  154         return (0);
  155 }
  156 
  157 static int
  158 portal_unmount(mp, mntflags, td)
  159         struct mount *mp;
  160         int mntflags;
  161         struct thread *td;
  162 {
  163         int error, flags = 0;
  164 
  165 
  166         if (mntflags & MNT_FORCE)
  167                 flags |= FORCECLOSE;
  168 
  169         /*
  170          * Clear out buffer cache.  I don't think we
  171          * ever get anything cached at this level at the
  172          * moment, but who knows...
  173          */
  174 #ifdef notyet
  175         mntflushbuf(mp, 0);
  176         if (mntinvalbuf(mp, 1))
  177                 return (EBUSY);
  178 #endif
  179         /* There is 1 extra root vnode reference (pm_root). */
  180         error = vflush(mp, 1, flags);
  181         if (error)
  182                 return (error);
  183 
  184         /*
  185          * Shutdown the socket.  This will cause the select in the
  186          * daemon to wake up, and then the accept will get ECONNABORTED
  187          * which it interprets as a request to go and bury itself.
  188          */
  189         soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
  190         /*
  191          * Discard reference to underlying file.  Must call closef because
  192          * this may be the last reference.
  193          */
  194         closef(VFSTOPORTAL(mp)->pm_server, (struct thread *) 0);
  195         /*
  196          * Finally, throw away the portalmount structure
  197          */
  198         free(mp->mnt_data, M_PORTALFSMNT);      /* XXX */
  199         mp->mnt_data = 0;
  200         return (0);
  201 }
  202 
  203 static int
  204 portal_root(mp, vpp)
  205         struct mount *mp;
  206         struct vnode **vpp;
  207 {
  208         struct thread *td = curthread;  /* XXX */
  209         struct vnode *vp;
  210 
  211         /*
  212          * Return locked reference to root.
  213          */
  214         vp = VFSTOPORTAL(mp)->pm_root;
  215         VREF(vp);
  216         vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
  217         *vpp = vp;
  218         return (0);
  219 }
  220 
  221 static int
  222 portal_statfs(mp, sbp, td)
  223         struct mount *mp;
  224         struct statfs *sbp;
  225         struct thread *td;
  226 {
  227 
  228         sbp->f_flags = 0;
  229         sbp->f_bsize = DEV_BSIZE;
  230         sbp->f_iosize = DEV_BSIZE;
  231         sbp->f_blocks = 2;              /* 1K to keep df happy */
  232         sbp->f_bfree = 0;
  233         sbp->f_bavail = 0;
  234         sbp->f_files = 1;               /* Allow for "." */
  235         sbp->f_ffree = 0;               /* See comments above */
  236         if (sbp != &mp->mnt_stat) {
  237                 sbp->f_type = mp->mnt_vfc->vfc_typenum;
  238                 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
  239                 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
  240                 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
  241         }
  242         return (0);
  243 }
  244 
  245 static struct vfsops portal_vfsops = {
  246         portal_mount,
  247         vfs_stdstart,
  248         portal_unmount,
  249         portal_root,
  250         vfs_stdquotactl,
  251         portal_statfs,
  252         vfs_stdsync,
  253         vfs_stdvget,
  254         vfs_stdfhtovp,
  255         vfs_stdcheckexp,
  256         vfs_stdvptofh,
  257         vfs_stdinit,
  258         vfs_stduninit,
  259         vfs_stdextattrctl,
  260 };
  261 
  262 VFS_SET(portal_vfsops, portalfs, VFCF_SYNTHETIC);

Cache object: 282d0847dcc9a890dd81a8c56065eff6

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/fs/portalfs/portal_vfsops.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/portalfs/portal_vfsops.c