projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
sosend's 2nd arg is mbuf, not sockaddr
[unix-history] / usr / src / sys / miscfs / portal / portal_vnops.c
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* %sccs.include.redist.c%
*
* @(#)portal_vnops.c 8.5 (Berkeley) %G%
*
* $Id: portal_vnops.c,v 1.4 1992/05/30 10:05:24 jsp Exp jsp $
*/
/*
* 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/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/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
* cnp is the name to locate in that directory...
*/
portal_lookup(ap)
struct vop_lookup_args /* {
struct vnode * a_dvp;
struct vnode ** a_vpp;
struct componentname * a_cnp;
} */ *ap;
{
char *pname = ap->a_cnp->cn_nameptr;
struct portalnode *pt;
int error;
struct vnode *fvp = 0;
char *path;
int size;
#ifdef PORTAL_DIAGNOSTIC
printf("portal_lookup(%s)\n", pname);
#endif
if (ap->a_cnp->cn_namelen == 1 && *pname == '.') {
*ap->a_vpp = ap->a_dvp;
VREF(ap->a_dvp);
/*VOP_LOCK(ap->a_dvp);*/
return (0);
}
#ifdef PORTAL_DIAGNOSTIC
printf("portal_lookup: allocate new vnode\n");
#endif
error = getnewvnode(VT_PORTAL, ap->a_dvp->v_mount, portal_vnodeop_p, &fvp);
if (error)
goto bad;
fvp->v_type = VREG;
MALLOC(fvp->v_data, void *, sizeof(struct portalnode),
M_TEMP, M_WAITOK);
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++;
ap->a_cnp->cn_consume = size - ap->a_cnp->cn_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++;
*ap->a_vpp = 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);
}
*ap->a_vpp = 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(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
struct socket *so = 0;
struct portalnode *pt;
struct proc *p = ap->a_p;
struct vnode *vp = ap->a_vp;
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 = pt->pt_size + sizeof(pcred) + 512; /* XXX */
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_flag = ap->a_mode;
pcred.pcr_uid = ap->a_cred->cr_uid;
pcred.pcr_ngroups = ap->a_cred->cr_ngroups;
bcopy(ap->a_cred->cr_groups, pcred.pcr_groups, NGROUPS * sizeof(gid_t));
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 (((ap->a_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);
}
portal_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct vattr *vap = ap->a_vap;
bzero(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(ap)
struct vop_setattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
/*
* Can't mess with the root vnode
*/
if (ap->a_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(ap)
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap;
{
/* *ap->a_eofflagp = 1; */
return (0);
}
portal_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
} */ *ap;
{
#ifdef PORTAL_DIAGNOSTIC
if (VTOPORTAL(ap->a_vp)->pt_arg)
printf("portal_inactive(%x, %s)\n", ap->a_vp, VTOPORTAL(ap->a_vp)->pt_arg);
else
printf("portal_inactive(%x)\n", ap->a_vp);
#endif
/*vgone(ap->a_vp);*/
return (0);
}
portal_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct portalnode *pt = VTOPORTAL(ap->a_vp);
#ifdef PORTAL_DIAGOISTIC
printf("portal_reclaim(%x)\n", ap->a_vp);
#endif
if (pt->pt_arg) {
free((caddr_t) pt->pt_arg, M_TEMP);
pt->pt_arg = 0;
}
FREE(ap->a_vp->v_data, M_TEMP);
ap->a_vp->v_data = 0;
return (0);
}
/*
* Print out the contents of a Portal vnode.
*/
/* ARGSUSED */
portal_print(ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
printf("tag VT_PORTAL, portal vnode\n");
return (0);
}
/*void*/
portal_vfree(ap)
struct vop_vfree_args /* {
struct vnode *a_pvp;
ino_t a_ino;
int a_mode;
} */ *ap;
{
return (0);
}
/*
* 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 vop_create_args *)))portal_enotsupp)
#define portal_mknod ((int (*) __P((struct vop_mknod_args *)))portal_enotsupp)
#define portal_close ((int (*) __P((struct vop_close_args *)))nullop)
#define portal_access ((int (*) __P((struct vop_access_args *)))nullop)
#define portal_read ((int (*) __P((struct vop_read_args *)))portal_enotsupp)
#define portal_write ((int (*) __P((struct vop_write_args *)))portal_enotsupp)
#define portal_ioctl ((int (*) __P((struct vop_ioctl_args *)))portal_enotsupp)
#define portal_select ((int (*) __P((struct vop_select_args *)))portal_enotsupp)
#define portal_mmap ((int (*) __P((struct vop_mmap_args *)))portal_enotsupp)
#define portal_fsync ((int (*) __P((struct vop_fsync_args *)))nullop)
#define portal_seek ((int (*) __P((struct vop_seek_args *)))nullop)
#define portal_remove ((int (*) __P((struct vop_remove_args *)))portal_enotsupp)
#define portal_link ((int (*) __P((struct vop_link_args *)))portal_enotsupp)
#define portal_rename ((int (*) __P((struct vop_rename_args *)))portal_enotsupp)
#define portal_mkdir ((int (*) __P((struct vop_mkdir_args *)))portal_enotsupp)
#define portal_rmdir ((int (*) __P((struct vop_rmdir_args *)))portal_enotsupp)
#define portal_symlink \
((int (*) __P((struct vop_symlink_args *)))portal_enotsupp)
#define portal_readlink \
((int (*) __P((struct vop_readlink_args *)))portal_enotsupp)
#define portal_abortop ((int (*) __P((struct vop_abortop_args *)))nullop)
#define portal_lock ((int (*) __P((struct vop_lock_args *)))nullop)
#define portal_unlock ((int (*) __P((struct vop_unlock_args *)))nullop)
#define portal_bmap ((int (*) __P((struct vop_bmap_args *)))portal_badop)
#define portal_strategy \
((int (*) __P((struct vop_strategy_args *)))portal_badop)
#define portal_islocked ((int (*) __P((struct vop_islocked_args *)))nullop)
#define portal_advlock \
((int (*) __P((struct vop_advlock_args *)))portal_enotsupp)
#define portal_blkatoff \
((int (*) __P((struct vop_blkatoff_args *)))portal_enotsupp)
#define portal_valloc ((int(*) __P(( \
struct vnode *pvp, \
int mode, \
struct ucred *cred, \
struct vnode **vpp))) portal_enotsupp)
#define portal_truncate \
((int (*) __P((struct vop_truncate_args *)))portal_enotsupp)
#define portal_update ((int (*) __P((struct vop_update_args *)))portal_enotsupp)
#define portal_bwrite ((int (*) __P((struct vop_bwrite_args *)))portal_enotsupp)
int (**portal_vnodeop_p)();
struct vnodeopv_entry_desc portal_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, portal_lookup }, /* lookup */
{ &vop_create_desc, portal_create }, /* create */
{ &vop_mknod_desc, portal_mknod }, /* mknod */
{ &vop_open_desc, portal_open }, /* open */
{ &vop_close_desc, portal_close }, /* close */
{ &vop_access_desc, portal_access }, /* access */
{ &vop_getattr_desc, portal_getattr }, /* getattr */
{ &vop_setattr_desc, portal_setattr }, /* setattr */
{ &vop_read_desc, portal_read }, /* read */
{ &vop_write_desc, portal_write }, /* write */
{ &vop_ioctl_desc, portal_ioctl }, /* ioctl */
{ &vop_select_desc, portal_select }, /* select */
{ &vop_mmap_desc, portal_mmap }, /* mmap */
{ &vop_fsync_desc, portal_fsync }, /* fsync */
{ &vop_seek_desc, portal_seek }, /* seek */
{ &vop_remove_desc, portal_remove }, /* remove */
{ &vop_link_desc, portal_link }, /* link */
{ &vop_rename_desc, portal_rename }, /* rename */
{ &vop_mkdir_desc, portal_mkdir }, /* mkdir */
{ &vop_rmdir_desc, portal_rmdir }, /* rmdir */
{ &vop_symlink_desc, portal_symlink }, /* symlink */
{ &vop_readdir_desc, portal_readdir }, /* readdir */
{ &vop_readlink_desc, portal_readlink }, /* readlink */
{ &vop_abortop_desc, portal_abortop }, /* abortop */
{ &vop_inactive_desc, portal_inactive }, /* inactive */
{ &vop_reclaim_desc, portal_reclaim }, /* reclaim */
{ &vop_lock_desc, portal_lock }, /* lock */
{ &vop_unlock_desc, portal_unlock }, /* unlock */
{ &vop_bmap_desc, portal_bmap }, /* bmap */
{ &vop_strategy_desc, portal_strategy }, /* strategy */
{ &vop_print_desc, portal_print }, /* print */
{ &vop_islocked_desc, portal_islocked }, /* islocked */
{ &vop_advlock_desc, portal_advlock }, /* advlock */
{ &vop_blkatoff_desc, portal_blkatoff }, /* blkatoff */
{ &vop_valloc_desc, portal_valloc }, /* valloc */
{ &vop_vfree_desc, portal_vfree }, /* vfree */
{ &vop_truncate_desc, portal_truncate }, /* truncate */
{ &vop_update_desc, portal_update }, /* update */
{ &vop_bwrite_desc, portal_bwrite }, /* bwrite */
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc portal_vnodeop_opv_desc =
{ &portal_vnodeop_p, portal_vnodeop_entries };
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.