diff options
Diffstat (limited to 'sys/miscfs/portal/portal_vnops.c')
| -rw-r--r-- | sys/miscfs/portal/portal_vnops.c | 659 |
1 files changed, 0 insertions, 659 deletions
diff --git a/sys/miscfs/portal/portal_vnops.c b/sys/miscfs/portal/portal_vnops.c deleted file mode 100644 index d95f65cf01c..00000000000 --- a/sys/miscfs/portal/portal_vnops.c +++ /dev/null @@ -1,659 +0,0 @@ -/* $OpenBSD: portal_vnops.c,v 1.31 2009/08/14 16:32:21 jasper Exp $ */ -/* $NetBSD: portal_vnops.c,v 1.17 1996/02/13 13:12:57 mycroft Exp $ */ - -/* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. 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. 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 1.4 1992/05/30 10:05:24 jsp Exp - * @(#)portal_vnops.c 8.8 (Berkeley) 1/21/94 - */ - -/* - * 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/poll.h> -#include <sys/socket.h> -#include <sys/socketvar.h> -#include <sys/un.h> -#include <sys/unpcb.h> -#include <sys/syscallargs.h> -#include <miscfs/portal/portal.h> - -static int portal_fileid = PORTAL_ROOTFILEID+1; - -static void portal_closefd(struct proc *, int); -static int portal_connect(struct socket *, struct socket *); - - -int portal_badop(void *); - -int portal_lookup(void *); -int portal_open(void *); -int portal_getattr(void *); -int portal_setattr(void *); -int portal_link(void *); -int portal_symlink(void *); -int portal_readdir(void *); -int portal_inactive(void *); -int portal_reclaim(void *); -int portal_print(void *); -int portal_pathconf(void *); -int portal_poll(void *); - -int (**portal_vnodeop_p)(void *); -struct vnodeopv_entry_desc portal_vnodeop_entries[] = { - { &vop_default_desc, eopnotsupp }, - { &vop_lookup_desc, portal_lookup }, - { &vop_create_desc, eopnotsupp }, - { &vop_mknod_desc, eopnotsupp }, - { &vop_open_desc, portal_open }, - { &vop_close_desc, nullop }, - { &vop_access_desc, nullop }, - { &vop_getattr_desc, portal_getattr }, - { &vop_setattr_desc, portal_setattr }, - { &vop_read_desc, eopnotsupp }, - { &vop_write_desc, eopnotsupp }, - { &vop_ioctl_desc, (int (*)(void *))enoioctl }, - { &vop_poll_desc, portal_poll }, - { &vop_revoke_desc, vop_generic_revoke }, - { &vop_fsync_desc, nullop }, - { &vop_remove_desc, eopnotsupp }, - { &vop_link_desc, portal_link }, - { &vop_rename_desc, eopnotsupp }, - { &vop_mkdir_desc, eopnotsupp }, - { &vop_rmdir_desc, eopnotsupp }, - { &vop_symlink_desc, portal_symlink }, - { &vop_readdir_desc, portal_readdir }, - { &vop_readlink_desc, eopnotsupp }, - { &vop_abortop_desc, vop_generic_abortop }, - { &vop_inactive_desc, portal_inactive }, - { &vop_reclaim_desc, portal_reclaim }, - { &vop_lock_desc, vop_generic_lock }, - { &vop_unlock_desc, vop_generic_unlock }, - { &vop_bmap_desc, portal_badop }, - { &vop_strategy_desc, portal_badop }, - { &vop_print_desc, portal_print }, - { &vop_islocked_desc, vop_generic_islocked }, - { &vop_pathconf_desc, portal_pathconf }, - { &vop_advlock_desc, eopnotsupp }, - { &vop_bwrite_desc, eopnotsupp }, - { NULL, NULL } -}; -struct vnodeopv_desc portal_vnodeop_opv_desc = - { &portal_vnodeop_p, portal_vnodeop_entries }; - -static void -portal_closefd(struct proc *p, int fd) -{ - struct sys_close_args /* { - syscallarg(int) fd; - } */ ua; - register_t retval[2]; - int error; - - SCARG(&ua, fd) = fd; - error = sys_close(p, &ua, retval); - /* - * 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... - */ -int -portal_lookup(void *v) -{ - struct vop_lookup_args *ap = v; - struct componentname *cnp = ap->a_cnp; - struct vnode **vpp = ap->a_vpp; - struct vnode *dvp = ap->a_dvp; - char *pname = cnp->cn_nameptr; - struct proc *p = cnp->cn_proc; - struct portalnode *pt; - int error; - struct vnode *fvp = 0; - char *path; - int size; - - *vpp = NULLVP; - - if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) - return (EROFS); - - if (cnp->cn_namelen == 1 && *pname == '.') { - *vpp = dvp; - vref(dvp); - return (0); - } - - error = getnewvnode(VT_PORTAL, dvp->v_mount, portal_vnodeop_p, &fvp); - if (error) - goto bad; - fvp->v_type = VREG; - fvp->v_data = malloc(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++; - cnp->cn_consume = size - 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++; - - *vpp = fvp; - VOP_LOCK(fvp, LK_EXCLUSIVE, p); - /* - * As we are the last component of the path name, fix up - * the locking on the directory node. - */ - if ((cnp->cn_flags & LOCKPARENT) == 0) { - VOP_UNLOCK(dvp, 0, p); - cnp->cn_flags |= PDIRUNLOCK; - } - return (0); - -bad:; - if (fvp) - vrele(fvp); - return (error); -} - -static int -portal_connect(struct socket *so, struct socket *so2) -{ - /* from unp_connect, bypassing the namei stuff... */ - struct socket *so3; - struct unpcb *unp2; - struct unpcb *unp3; - - if (so2 == 0) - return (ECONNREFUSED); - - if (so->so_type != so2->so_type) - return (EPROTOTYPE); - - if ((so2->so_options & SO_ACCEPTCONN) == 0) - return (ECONNREFUSED); - - 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; - - - return (unp_connect2(so, so2)); -} - -int -portal_open(void *v) -{ - struct vop_open_args *ap = v; - 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); - - /* - * 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 - */ - res = pt->pt_size + sizeof(pcred) + 512; /* XXX */ - error = soreserve(so, res, res); - if (error) - goto bad; - - /* - * Kick off connection - */ - s = splsoftnet(); - error = portal_connect(so, (struct socket *)fmp->pm_server->f_data); - splx(s); - if (error) - goto bad; - - /* - * Wait for connection to complete - */ - /* - * 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 = splsoftnet(); - while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { - if (fmp->pm_server->f_count == 1) { - error = ECONNREFUSED; - splx(s); - goto bad; - } - (void) tsleep(&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; - - - pcred.pcr_flag = ap->a_mode; - pcred.pcr_uid = ap->a_cred->cr_uid; - pcred.pcr_gid = ap->a_cred->cr_gid; - 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 = &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; - - 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; - fdpunlock(p->p_fd); - error = soreceive(so, (struct mbuf **) 0, &auio, - &m, &cm, &flags, 0); - fdplock(p->p_fd); - 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; - } - } else { - if (cm == 0) { - error = ECONNRESET; /* XXX */ -#ifdef notdef - break; -#endif - } - } - } while (cm == 0 && auio.uio_resid == len && !error); - - if (cm == 0) - goto bad; - - if (auio.uio_resid) { - 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? - */ - cmsg = mtod(cm, struct cmsghdr *); - if (cmsg->cmsg_len < CMSG_LEN(0)) { - error = EMSGSIZE; - goto bad; - } - newfds = (cmsg->cmsg_len - sizeof(*cmsg)) / sizeof (int); - if (newfds == 0) { - 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_DATA(cmsg); - 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. - */ - if ((fp = fd_getfile(p->p_fd, fd)) == NULL) { - error = EBADF; - goto bad; - } - if (((ap->a_mode & (FREAD|FWRITE)) | fp->f_flag) != fp->f_flag) { - portal_closefd(p, fd); - error = EACCES; - goto bad; - } - - /* - * 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) { - m_freem(cm); - } - - if (so) { - soshutdown(so, 2); - soclose(so); - } - return (error); -} - -int -portal_getattr(void *v) -{ - struct vop_getattr_args *ap = v; - 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; - getnanotime(&vap->va_atime); - vap->va_mtime = vap->va_atime; - vap->va_ctime = vap->va_atime; - 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) { - 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 { - 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); -} - -int -portal_setattr(void *v) -{ - struct vop_setattr_args *ap = v; - - /* - * Can't mess with the root vnode - */ - if (ap->a_vp->v_flag & VROOT) - return (EACCES); - - if (ap->a_vap->va_flags != VNOVAL) - return (EOPNOTSUPP); - - return (0); -} - -/* - * Fake readdir, just return empty directory. - * It is hard to deal with '.' and '..' so don't bother. - */ -/*ARGSUSED*/ -int -portal_readdir(void *v) -{ - return (0); -} - -/*ARGSUSED*/ -int -portal_inactive(void *v) -{ - struct vop_inactive_args *ap = v; - - VOP_UNLOCK(ap->a_vp, 0, ap->a_p); - return (0); -} - -int -portal_reclaim(void *v) -{ - struct vop_reclaim_args *ap = v; - struct portalnode *pt = VTOPORTAL(ap->a_vp); - - if (pt->pt_arg) { - free(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); -} - -/* - * Return POSIX pathconf information applicable to special devices. - */ -int -portal_pathconf(void *v) -{ - struct vop_pathconf_args *ap = v; - - switch (ap->a_name) { - case _PC_LINK_MAX: - *ap->a_retval = LINK_MAX; - return (0); - case _PC_MAX_CANON: - *ap->a_retval = MAX_CANON; - return (0); - case _PC_MAX_INPUT: - *ap->a_retval = MAX_INPUT; - return (0); - case _PC_PIPE_BUF: - *ap->a_retval = PIPE_BUF; - return (0); - case _PC_CHOWN_RESTRICTED: - *ap->a_retval = 1; - return (0); - case _PC_VDISABLE: - *ap->a_retval = _POSIX_VDISABLE; - return (0); - default: - return (EINVAL); - } - /* NOTREACHED */ -} - -/* - * Print out the contents of a Portal vnode. - */ -/* ARGSUSED */ -int -portal_print(void *v) -{ - printf("tag VT_PORTAL, portal vnode\n"); - return (0); -} - -int -portal_link(void *v) -{ - struct vop_link_args *ap = v; - - VOP_ABORTOP(ap->a_dvp, ap->a_cnp); - vput(ap->a_dvp); - return (EROFS); -} - -int -portal_symlink(void *v) -{ - struct vop_symlink_args *ap = v; - - VOP_ABORTOP(ap->a_dvp, ap->a_cnp); - vput(ap->a_dvp); - return (EROFS); -} - -int -portal_badop(void *v) -{ - panic ("portal: bad op"); - return (0); -} - -int -portal_poll(void *v) -{ - struct vop_poll_args *ap = v; - - return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); -} |