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add new portal file system from jsp@sequent.com

This commit is contained in:
cgd 1994-01-05 14:23:21 +00:00
parent 3442768ab8
commit c78cf001a2
3 changed files with 1239 additions and 0 deletions
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73
sys/miscfs/portal/portal.h Normal file
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/*
* Copyright (c) 1992 The Regents of the University of California
* Copyright (c) 1990, 1992 Jan-Simon Pendry
* All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* From:
* Id: portal.h,v 1.4 1993/09/22 17:57:12 jsp Exp
*
* $Id: portal.h,v 1.1 1994/01/05 14:23:21 cgd Exp $
*/
struct portal_args {
char *pa_config; /* Config file */
int pa_socket; /* Socket to server */
};
struct portal_cred {
uid_t pcr_uid; /* From ucred */
gid_t pcr_gid; /* From ucred */
};
#ifdef KERNEL
struct portalmount {
struct vnode *pm_root; /* Root node */
struct file *pm_server; /* Held reference to server socket */
};
struct portalnode {
int pt_size; /* Length of Arg */
char *pt_arg; /* Arg to send to server */
int pt_fileid; /* cookie */
};
#define VFSTOPORTAL(mp) ((struct portalmount *)((mp)->mnt_data))
#define VTOPORTAL(vp) ((struct portalnode *)(vp)->v_data)
#define PORTAL_ROOTFILEID 2
extern struct vnodeops portal_vnodeops;
extern struct vfsops portal_vfsops;
#endif /* KERNEL */

337
sys/miscfs/portal/portal_vfsops.c Normal file
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/*
* Copyright (c) 1992 The Regents of the University of California
* Copyright (c) 1990, 1992 Jan-Simon Pendry
* All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* From:
* Id: portal_vfsops.c,v 1.6 1993/09/22 17:57:30 jsp Exp
*
* $Id: portal_vfsops.c,v 1.1 1994/01/05 14:23:24 cgd Exp $
*/
/*
* Portal Filesystem
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/proc.h>
/*#include <sys/resourcevar.h>*/
#include <sys/filedesc.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/un.h>
#include <miscfs/portal/portal.h>
static u_short portal_mntid;
int portal_init()
{
#ifdef PORTAL_DIAGNOSTIC
printf("portal_init\n"); /* printed during system boot */
#endif
}
/*
* Mount the per-process file descriptors (/dev/fd)
*/
portal_mount(mp, path, data, ndp, p)
struct mount *mp;
char *path;
caddr_t data;
struct nameidata *ndp;
struct proc *p;
{
int error = 0;
struct portal_args args;
u_int size;
struct portalmount *fmp;
struct vnode *rvp;
struct sockaddr_un *unp;
struct file *fp;
struct socket *so;
char cfile[MAXPATHLEN];
#ifdef PORTAL_DIAGNOSTIC
printf("portal_mount(mp = %x)\n", mp);
#endif
/*
* Update is a no-op
*/
if (mp->mnt_flag & MNT_UPDATE)
return (EOPNOTSUPP);
if (error = copyin(data, (caddr_t) &args, sizeof(struct portal_args)))
return (error);
if (error = getsock(p->p_fd, args.pa_socket, &fp))
return (error);
so = (struct socket *) fp->f_data;
if (so->so_proto->pr_domain->dom_family != AF_UNIX)
return (ESOCKTNOSUPPORT);
error = getnewvnode(VT_UFS, mp, &portal_vnodeops, &rvp); /* XXX */
if (error)
return (error);
fmp = (struct portalmount *) malloc(sizeof(struct portalmount),
M_UFSMNT, M_WAITOK); /* XXX */
rvp->v_type = VDIR;
rvp->v_flag |= VROOT;
VTOPORTAL(rvp)->pt_arg = 0;
VTOPORTAL(rvp)->pt_size = 0;
VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_mount: root vp = %x\n", rvp);
#endif
fmp->pm_root = rvp;
fmp->pm_server = fp; fp->f_count++;
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_data = (qaddr_t) fmp;
getnewfsid(mp, MOUNT_PORTAL);
(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
(void) copyinstr(args.pa_config, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
&size);
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
#ifdef notdef
bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
#endif
#ifdef PORTAL_DIAGNOSTIC
printf("portal_mount: config %s at %s\n",
mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
#endif
return (0);
}
portal_start(mp, flags, p)
struct mount *mp;
int flags;
struct proc *p;
{
return (0);
}
portal_unmount(mp, mntflags, p)
struct mount *mp;
int mntflags;
struct proc *p;
{
int error;
int flags = 0;
extern int doforce;
struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_unmount(mp = %x)\n", mp);
#endif
if (mntflags & MNT_FORCE) {
/* portal can never be rootfs so don't check for it */
if (!doforce)
return (EINVAL);
flags |= FORCECLOSE;
}
/*
* Clear out buffer cache. I don't think we
* ever get anything cached at this level at the
* moment, but who knows...
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_unmount: calling mntflushbuf\n");
#endif
mntflushbuf(mp, 0);
#ifdef PORTAL_DIAGNOSTIC
printf("portal_unmount: calling mntinvalbuf\n");
#endif
if (mntinvalbuf(mp, 1))
return (EBUSY);
if (rootvp->v_usecount > 1)
return (EBUSY);
#ifdef PORTAL_DIAGNOSTIC
printf("portal_unmount: calling vflush\n");
#endif
if (error = vflush(mp, rootvp, flags))
return (error);
#ifdef PORTAL_DIAGNOSTIC
vprint("portal root", rootvp);
#endif
/*
* Release reference on underlying root vnode
*/
vrele(rootvp);
/*
* And blow it away for future re-use
*/
vgone(rootvp);
/*
* Shutdown the socket. This will cause the select in the
* daemon to wake up, and then the accept will get ECONNABORTED
* which it interprets as a request to go and bury itself.
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_unmount: shutdown socket\n");
#endif
soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
/*
* Discard reference to underlying file. Must call closef because
* this may be the last reference.
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_unmount: closef(%x)\n", VFSTOPORTAL(mp)->pm_server);
#endif
closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
/*
* Finally, throw away the portalmount structure
*/
free(mp->mnt_data, M_UFSMNT); /* XXX */
mp->mnt_data = 0;
return 0;
}
portal_root(mp, vpp)
struct mount *mp;
struct vnode **vpp;
{
struct vnode *vp;
int error;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_root(mp = %x)\n", mp);
#endif
/*
* Return locked reference to root.
*/
vp = VFSTOPORTAL(mp)->pm_root;
VREF(vp);
VOP_LOCK(vp);
*vpp = vp;
return (0);
}
portal_quotactl(mp, cmd, uid, arg, p)
struct mount *mp;
int cmd;
uid_t uid;
caddr_t arg;
struct proc *p;
{
return (EOPNOTSUPP);
}
portal_statfs(mp, sbp, p)
struct mount *mp;
struct statfs *sbp;
struct proc *p;
{
struct filedesc *fdp;
int lim;
int i;
int last;
int freefd;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_statfs(mp = %x)\n", mp);
#endif
sbp->f_type = MOUNT_PORTAL;
sbp->f_flags = 0;
sbp->f_fsize = DEV_BSIZE;
sbp->f_bsize = DEV_BSIZE;
sbp->f_blocks = 2; /* 1K to keep df happy */
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = 1; /* Allow for "." */
sbp->f_ffree = 0; /* See comments above */
if (sbp != &mp->mnt_stat) {
bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
}
return (0);
}
portal_sync(mp, waitfor)
struct mount *mp;
int waitfor;
{
return (0);
}
portal_fhtovp(mp, fhp, vpp)
struct mount *mp;
struct fid *fhp;
struct vnode **vpp;
{
return (EOPNOTSUPP);
}
portal_vptofh(vp, fhp)
struct vnode *vp;
struct fid *fhp;
{
return (EOPNOTSUPP);
}
struct vfsops portal_vfsops = {
portal_mount,
portal_start,
portal_unmount,
portal_root,
portal_quotactl,
portal_statfs,
portal_sync,
portal_fhtovp,
portal_vptofh,
portal_init,
};

829
sys/miscfs/portal/portal_vnops.c Normal file
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/*
* Copyright (c) 1992 The Regents of the University of California
* Copyright (c) 1990, 1992 Jan-Simon Pendry
* All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* From:
* Id: portal_vnops.c,v 1.5 1993/09/22 17:57:20 jsp Exp
*
* $Id: portal_vnops.c,v 1.1 1994/01/05 14:23:29 cgd Exp $
*/
/*
* Portal Filesystem
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/proc.h>
/*#include <sys/resourcevar.h>*/
#include <sys/filedesc.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/namei.h>
/*#include <sys/buf.h>*/
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#include <miscfs/portal/portal.h>
static int portal_fileid = PORTAL_ROOTFILEID+1;
static void
portal_closefd(p, fd)
struct proc *p;
int fd;
{
int error;
struct {
int fd;
} ua;
int rc;
ua.fd = fd;
error = close(p, &ua, &rc);
/*
* We should never get an error, and there isn't anything
* we could do if we got one, so just print a message.
*/
if (error)
printf("portal_closefd: error = %d\n", error);
}
/*
* vp is the current namei directory
* ndp is the name to locate in that directory...
*/
portal_lookup(dvp, ndp, p)
struct vnode *dvp;
struct nameidata *ndp;
struct proc *p;
{
char *pname = ndp->ni_ptr;
struct portalnode *pt;
int error;
struct vnode *fvp = 0;
char *path;
int size;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_lookup(%s)\n", pname);
#endif
if (ndp->ni_namelen == 1 && *pname == '.') {
ndp->ni_dvp = dvp;
ndp->ni_vp = dvp;
VREF(dvp);
/*VOP_LOCK(dvp);*/
return (0);
}
#ifdef PORTAL_DIAGNOSTIC
printf("portal_lookup: allocate new vnode\n");
#endif
error = getnewvnode(VT_UFS, dvp->v_mount, &portal_vnodeops, &fvp);
if (error)
goto bad;
fvp->v_type = VREG;
pt = VTOPORTAL(fvp);
/*
* Save all of the remaining pathname and
* advance the namei next pointer to the end
* of the string.
*/
for (size = 0, path = pname; *path; path++)
size++;
ndp->ni_next = path;
ndp->ni_pathlen -= size - ndp->ni_namelen;
pt->pt_arg = malloc(size+1, M_TEMP, M_WAITOK);
pt->pt_size = size+1;
bcopy(pname, pt->pt_arg, pt->pt_size);
pt->pt_fileid = portal_fileid++;
ndp->ni_dvp = dvp;
ndp->ni_vp = fvp;
/*VOP_LOCK(fvp);*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_lookup: newvp = %x\n", fvp);
#endif
return (0);
bad:;
if (fvp) {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_lookup: vrele(%x)\n", fvp);
#endif
vrele(fvp);
}
ndp->ni_dvp = dvp;
ndp->ni_vp = NULL;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_lookup: error = %d\n", error);
#endif
return (error);
}
static int
portal_connect(so, so2)
struct socket *so;
struct socket *so2;
{
/* from unp_connect, bypassing the namei stuff... */
struct socket *so3;
struct unpcb *unp2;
struct unpcb *unp3;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_connect\n");
#endif
if (so2 == 0)
return (ECONNREFUSED);
if (so->so_type != so2->so_type)
return (EPROTOTYPE);
if ((so2->so_options & SO_ACCEPTCONN) == 0)
return (ECONNREFUSED);
#ifdef PORTAL_DIAGNOSTIC
printf("portal_connect: calling sonewconn\n");
#endif
if ((so3 = sonewconn(so2, 0)) == 0)
return (ECONNREFUSED);
unp2 = sotounpcb(so2);
unp3 = sotounpcb(so3);
if (unp2->unp_addr)
unp3->unp_addr = m_copy(unp2->unp_addr, 0, (int)M_COPYALL);
so2 = so3;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_connect: calling unp_connect2\n");
#endif
return (unp_connect2(so, so2));
}
portal_open(vp, mode, cred, p)
struct vnode *vp;
int mode;
struct ucred *cred;
struct proc *p;
{
struct socket *so = 0;
struct portalnode *pt;
int s;
struct uio auio;
struct iovec aiov[2];
int res;
struct mbuf *cm = 0;
struct cmsghdr *cmsg;
int newfds;
int *ip;
int fd;
int error;
int len;
struct portalmount *fmp;
struct file *fp;
struct portal_cred pcred;
/*
* Nothing to do when opening the root node.
*/
if (vp->v_flag & VROOT)
return (0);
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open(%x)\n", vp);
#endif
/*
* Can't be opened unless the caller is set up
* to deal with the side effects. Check for this
* by testing whether the p_dupfd has been set.
*/
if (p->p_dupfd >= 0)
return (ENODEV);
pt = VTOPORTAL(vp);
fmp = VFSTOPORTAL(vp->v_mount);
/*
* Create a new socket.
*/
error = socreate(AF_UNIX, &so, SOCK_STREAM, 0);
if (error)
goto bad;
/*
* Reserve some buffer space
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: calling soreserve\n");
#endif
res = max(512, pt->pt_size + 128);
error = soreserve(so, res, res);
if (error)
goto bad;
/*
* Kick off connection
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: calling portal_connect\n");
#endif
error = portal_connect(so, (struct socket *)fmp->pm_server->f_data);
if (error)
goto bad;
/*
* Wait for connection to complete
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: waiting for connect\n");
#endif
/*
* XXX: Since the mount point is holding a reference on the
* underlying server socket, it is not easy to find out whether
* the server process is still running. To handle this problem
* we loop waiting for the new socket to be connected (something
* which will only happen if the server is still running) or for
* the reference count on the server socket to drop to 1, which
* will happen if the server dies. Sleep for 5 second intervals
* and keep polling the reference count. XXX.
*/
s = splnet();
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
if (fmp->pm_server->f_count == 1) {
error = ECONNREFUSED;
splx(s);
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: server process has gone away\n");
#endif
goto bad;
}
(void) tsleep((caddr_t) &so->so_timeo, PSOCK, "portalcon", 5 * hz);
}
splx(s);
if (so->so_error) {
error = so->so_error;
goto bad;
}
/*
* Set miscellaneous flags
*/
so->so_rcv.sb_timeo = 0;
so->so_snd.sb_timeo = 0;
so->so_rcv.sb_flags |= SB_NOINTR;
so->so_snd.sb_flags |= SB_NOINTR;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: constructing data uio\n");
#endif
pcred.pcr_uid = cred->cr_uid;
pcred.pcr_gid = cred->cr_gid;
aiov[0].iov_base = (caddr_t) &pcred;
aiov[0].iov_len = sizeof(pcred);
aiov[1].iov_base = pt->pt_arg;
aiov[1].iov_len = pt->pt_size;
auio.uio_iov = aiov;
auio.uio_iovcnt = 2;
auio.uio_rw = UIO_WRITE;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_procp = p;
auio.uio_offset = 0;
auio.uio_resid = aiov[0].iov_len + aiov[1].iov_len;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: sending data to server\n");
#endif
error = sosend(so, (struct mbuf *) 0, &auio,
(struct mbuf *) 0, (struct mbuf *) 0, 0);
if (error)
goto bad;
len = auio.uio_resid = sizeof(int);
do {
struct mbuf *m = 0;
int flags = MSG_WAITALL;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: receiving data from server\n");
printf("portal_open: so = %x, cm = %x, resid = %d\n",
so, cm, auio.uio_resid);
printf("portal_open, uio=%x, mp0=%x, controlp=%x\n", &auio, &cm);
#endif
error = soreceive(so, (struct mbuf **) 0, &auio,
&m, &cm, &flags);
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: after receiving data\n");
printf("portal_open: so = %x, cm = %x, resid = %d\n",
so, cm, auio.uio_resid);
#endif
if (error)
goto bad;
/*
* Grab an error code from the mbuf.
*/
if (m) {
m = m_pullup(m, sizeof(int)); /* Needed? */
if (m) {
error = *(mtod(m, int *));
m_freem(m);
} else {
error = EINVAL;
}
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: error returned is %d\n", error);
#endif
} else {
if (cm == 0) {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: no rights received\n");
#endif
error = ECONNRESET; /* XXX */
#ifdef notdef
break;
#endif
}
}
} while (cm == 0 && auio.uio_resid == len && !error);
if (cm == 0)
goto bad;
if (auio.uio_resid) {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: still need another %d bytes\n", auio.uio_resid);
#endif
error = 0;
#ifdef notdef
error = EMSGSIZE;
goto bad;
#endif
}
/*
* XXX: Break apart the control message, and retrieve the
* received file descriptor. Note that more than one descriptor
* may have been received, or that the rights chain may have more
* than a single mbuf in it. What to do?
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: about to break apart control message\n");
#endif
cmsg = mtod(cm, struct cmsghdr *);
newfds = (cmsg->cmsg_len - sizeof(*cmsg)) / sizeof (int);
if (newfds == 0) {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: received no fds\n");
#endif
error = ECONNREFUSED;
goto bad;
}
/*
* At this point the rights message consists of a control message
* header, followed by a data region containing a vector of
* integer file descriptors. The fds were allocated by the action
* of receiving the control message.
*/
ip = (int *) (cmsg + 1);
fd = *ip++;
if (newfds > 1) {
/*
* Close extra fds.
*/
int i;
printf("portal_open: %d extra fds\n", newfds - 1);
for (i = 1; i < newfds; i++) {
portal_closefd(p, *ip);
ip++;
}
}
/*
* Check that the mode the file is being opened for is a subset
* of the mode of the existing descriptor.
*/
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: checking file flags, fd = %d\n", fd);
#endif
fp = p->p_fd->fd_ofiles[fd];
if (((mode & (FREAD|FWRITE)) | fp->f_flag) != fp->f_flag) {
portal_closefd(p, fd);
error = EACCES;
goto bad;
}
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: got fd = %d\n", fd);
#endif
/*
* Save the dup fd in the proc structure then return the
* special error code (ENXIO) which causes magic things to
* happen in vn_open. The whole concept is, well, hmmm.
*/
p->p_dupfd = fd;
error = ENXIO;
bad:;
/*
* And discard the control message.
*/
if (cm) {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: free'ing control message\n");
#endif
m_freem(cm);
}
if (so) {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: calling soshutdown\n");
#endif
soshutdown(so, 2);
#ifdef PORTAL_DIAGNOSTIC
printf("portal_open: calling soclose\n");
#endif
soclose(so);
}
#ifdef PORTAL_DIAGNOSTIC
if (error != ENODEV)
printf("portal_open: error = %d\n", error);
#endif
return (error);
#if 0
/*
* XXX Kludge: set curproc->p_dupfd to contain the value of the
* the file descriptor being sought for duplication. The error
* return ensures that the vnode for this device will be released
* by vn_open. Open will detect this special error and take the
* actions in dupfdopen. Other callers of vn_open or VOP_OPEN
* will simply report the error.
*/
fdp = p->p_fd;
dfd = VTOPORTAL(vp)->f_fd;
/*
* Check that the file descriptor is valid
*/
if (dfd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[dfd]) == NULL)
return (EBADF);
/*
* Check that the mode the file is being opened for is a subset
* of the mode of the existing descriptor.
*/
if (((mode & (FREAD|FWRITE)) | fp->f_flag) != fp->f_flag)
return (EACCES);
/*
* Go ahead and dup the file descriptor.
* The file pointer will be stolen back in
* dupfdopen, and the file descriptor freed.
*/
if (error = fdalloc(p, 0, &fd))
return (error);
fdp->fd_ofiles[fd] = fp;
fdp->fd_ofileflags[fd] = fdp->fd_ofileflags[dfd] /* &~ UF_EXCLOSE */;
fp->f_count++;
if (fd > fdp->fd_lastfile)
fdp->fd_lastfile = fd;
p->p_dupfd = fd; /* XXX */
return (ENODEV);
#endif
}
portal_getattr(vp, vap, cred, p)
struct vnode *vp;
struct vattr *vap;
struct ucred *cred;
struct proc *p;
{
unsigned fd;
int error;
bzero((caddr_t) vap, sizeof(*vap));
vattr_null(vap);
vap->va_uid = 0;
vap->va_gid = 0;
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
vap->va_size = DEV_BSIZE;
vap->va_blocksize = DEV_BSIZE;
microtime(&vap->va_atime);
vap->va_mtime = vap->va_atime;
vap->va_ctime = vap->va_ctime;
vap->va_gen = 0;
vap->va_flags = 0;
vap->va_rdev = 0;
/* vap->va_qbytes = 0; */
vap->va_bytes = 0;
/* vap->va_qsize = 0; */
if (vp->v_flag & VROOT) {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_getattr: stat rootdir\n");
#endif
vap->va_type = VDIR;
vap->va_mode = S_IRUSR|S_IWUSR|S_IXUSR|
S_IRGRP|S_IWGRP|S_IXGRP|
S_IROTH|S_IWOTH|S_IXOTH;
vap->va_nlink = 2;
vap->va_fileid = 2;
} else {
#ifdef PORTAL_DIAGNOSTIC
printf("portal_getattr: stat portal\n");
#endif
vap->va_type = VREG;
vap->va_mode = S_IRUSR|S_IWUSR|
S_IRGRP|S_IWGRP|
S_IROTH|S_IWOTH;
vap->va_nlink = 1;
vap->va_fileid = VTOPORTAL(vp)->pt_fileid;
}
return (0);
}
portal_setattr(vp, vap, cred, p)
struct vnode *vp;
struct vattr *vap;
struct ucred *cred;
struct proc *p;
{
/*
* Can't mess with the root vnode
*/
if (vp->v_flag & VROOT)
return (EACCES);
return (0);
}
/*
* Fake readdir, just return empty directory.
* It is hard to deal with '.' and '..' so don't bother.
*/
portal_readdir(vp, uio, cred, eofflagp, cookies, ncookies)
struct vnode *vp;
struct uio *uio;
struct ucred *cred;
int *eofflagp;
u_int *cookies;
int ncookies;
{
*eofflagp = 1;
return (0);
}
portal_inactive(vp, p)
struct vnode *vp;
struct proc *p;
{
#ifdef PORTAL_DIAGNOSTIC
if (VTOPORTAL(vp)->pt_arg)
printf("portal_inactive(%x, %s)\n", vp, VTOPORTAL(vp)->pt_arg);
else
printf("portal_inactive(%x)\n", vp);
#endif
/*vgone(vp);*/
return (0);
}
portal_reclaim(vp)
struct vnode *vp;
{
struct portalnode *pt = VTOPORTAL(vp);
if (pt->pt_arg) {
free((caddr_t) pt->pt_arg, M_TEMP);
pt->pt_arg = 0;
}
printf("portal_reclaim(%x)\n", vp);
return (0);
}
/*
* Print out the contents of a Portal vnode.
*/
/* ARGSUSED */
portal_print(vp)
struct vnode *vp;
{
printf("tag VT_PORTAL, portal vnode\n");
}
/*
* Portal vnode unsupported operation
*/
portal_enotsupp()
{
return (EOPNOTSUPP);
}
/*
* Portal "should never get here" operation
*/
portal_badop()
{
panic("portal: bad op");
/* NOTREACHED */
}
/*
* Portal vnode null operation
*/
portal_nullop()
{
return (0);
}
#define portal_create ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
struct proc *p))) portal_enotsupp)
#define portal_mknod ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
struct ucred *cred, \
struct proc *p))) portal_enotsupp)
#define portal_close ((int (*) __P(( \
struct vnode *vp, \
int fflag, \
struct ucred *cred, \
struct proc *p))) nullop)
#define portal_access ((int (*) __P(( \
struct vnode *vp, \
int mode, \
struct ucred *cred, \
struct proc *p))) nullop)
#define portal_read ((int (*) __P(( \
struct vnode *vp, \
struct uio *uio, \
int ioflag, \
struct ucred *cred))) portal_enotsupp)
#define portal_write ((int (*) __P(( \
struct vnode *vp, \
struct uio *uio, \
int ioflag, \
struct ucred *cred))) portal_enotsupp)
#define portal_ioctl ((int (*) __P(( \
struct vnode *vp, \
int command, \
caddr_t data, \
int fflag, \
struct ucred *cred, \
struct proc *p))) portal_enotsupp)
#define portal_select ((int (*) __P(( \
struct vnode *vp, \
int which, \
int fflags, \
struct ucred *cred, \
struct proc *p))) portal_enotsupp)
#define portal_mmap ((int (*) __P(( \
struct vnode *vp, \
int fflags, \
struct ucred *cred, \
struct proc *p))) portal_enotsupp)
#define portal_fsync ((int (*) __P(( \
struct vnode *vp, \
int fflags, \
struct ucred *cred, \
int waitfor, \
struct proc *p))) nullop)
#define portal_seek ((int (*) __P(( \
struct vnode *vp, \
off_t oldoff, \
off_t newoff, \
struct ucred *cred))) nullop)
#define portal_remove ((int (*) __P(( \
struct nameidata *ndp, \
struct proc *p))) portal_enotsupp)
#define portal_link ((int (*) __P(( \
struct vnode *vp, \
struct nameidata *ndp, \
struct proc *p))) portal_enotsupp)
#define portal_rename ((int (*) __P(( \
struct nameidata *fndp, \
struct nameidata *tdnp, \
struct proc *p))) portal_enotsupp)
#define portal_mkdir ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
struct proc *p))) portal_enotsupp)
#define portal_rmdir ((int (*) __P(( \
struct nameidata *ndp, \
struct proc *p))) portal_enotsupp)
#define portal_symlink ((int (*) __P(( \
struct nameidata *ndp, \
struct vattr *vap, \
char *target, \
struct proc *p))) portal_enotsupp)
#define portal_readlink ((int (*) __P(( \
struct vnode *vp, \
struct uio *uio, \
struct ucred *cred))) portal_enotsupp)
#define portal_abortop ((int (*) __P(( \
struct nameidata *ndp))) nullop)
#define portal_lock ((int (*) __P(( \
struct vnode *vp))) nullop)
#define portal_unlock ((int (*) __P(( \
struct vnode *vp))) nullop)
#define portal_bmap ((int (*) __P(( \
struct vnode *vp, \
daddr_t bn, \
struct vnode **vpp, \
daddr_t *bnp))) portal_badop)
#define portal_strategy ((int (*) __P(( \
struct buf *bp))) portal_badop)
#define portal_islocked ((int (*) __P(( \
struct vnode *vp))) nullop)
#define portal_advlock ((int (*) __P(( \
struct vnode *vp, \
caddr_t id, \
int op, \
struct flock *fl, \
int flags))) portal_enotsupp)
struct vnodeops portal_vnodeops = {
portal_lookup, /* lookup */
portal_create, /* create */
portal_mknod, /* mknod */
portal_open, /* open */
portal_close, /* close */
portal_access, /* access */
portal_getattr, /* getattr */
portal_setattr, /* setattr */
portal_read, /* read */
portal_write, /* write */
portal_ioctl, /* ioctl */
portal_select, /* select */
portal_mmap, /* mmap */
portal_fsync, /* fsync */
portal_seek, /* seek */
portal_remove, /* remove */
portal_link, /* link */
portal_rename, /* rename */
portal_mkdir, /* mkdir */
portal_rmdir, /* rmdir */
portal_symlink, /* symlink */
portal_readdir, /* readdir */
portal_readlink, /* readlink */
portal_abortop, /* abortop */
portal_inactive, /* inactive */
portal_reclaim, /* reclaim */
portal_lock, /* lock */
portal_unlock, /* unlock */
portal_bmap, /* bmap */
portal_strategy, /* strategy */
portal_print, /* print */
portal_islocked, /* islocked */
portal_advlock, /* advlock */
};