a6aeade2c4
Delete 'always succeed' select/poll handlers, replaced with generic call. Flag missing vnode op table entries.
999 lines
23 KiB
C
999 lines
23 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)fdesc_vnops.c 8.9 (Berkeley) 1/21/94
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*
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* $Id: fdesc_vnops.c,v 1.25 1997/09/07 05:25:53 bde Exp $
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*/
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/*
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* /dev/fd Filesystem
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/kernel.h> /* boottime */
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#include <sys/filedesc.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/dirent.h>
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#include <sys/socketvar.h>
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#include <sys/conf.h>
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#include <miscfs/fdesc/fdesc.h>
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extern struct cdevsw ctty_cdevsw;
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#define cttyvp(p) ((p)->p_flag & P_CONTROLT ? (p)->p_session->s_ttyvp : NULL)
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#define FDL_WANT 0x01
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#define FDL_LOCKED 0x02
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static int fdcache_lock;
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static vop_t **fdesc_vnodeop_p;
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dev_t devctty;
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#if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
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FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
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#endif
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#define NFDCACHE 4
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#define FD_NHASH(ix) \
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(&fdhashtbl[(ix) & fdhash])
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LIST_HEAD(fdhashhead, fdescnode) *fdhashtbl;
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u_long fdhash;
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static int fdesc_attr __P((int fd, struct vattr *vap, struct ucred *cred,
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struct proc *p));
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static int fdesc_badop __P((void));
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static int fdesc_getattr __P((struct vop_getattr_args *ap));
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static struct fdcache *
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fdesc_hash __P((int ix));
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static int fdesc_inactive __P((struct vop_inactive_args *ap));
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static int fdesc_ioctl __P((struct vop_ioctl_args *ap));
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static int fdesc_lookup __P((struct vop_lookup_args *ap));
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static int fdesc_open __P((struct vop_open_args *ap));
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static int fdesc_pathconf __P((struct vop_pathconf_args *ap));
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static int fdesc_print __P((struct vop_print_args *ap));
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static int fdesc_read __P((struct vop_read_args *ap));
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static int fdesc_readdir __P((struct vop_readdir_args *ap));
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static int fdesc_readlink __P((struct vop_readlink_args *ap));
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static int fdesc_reclaim __P((struct vop_reclaim_args *ap));
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static int fdesc_poll __P((struct vop_poll_args *ap));
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static int fdesc_setattr __P((struct vop_setattr_args *ap));
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static int fdesc_vfree __P((struct vop_vfree_args *ap));
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static int fdesc_write __P((struct vop_write_args *ap));
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/*
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* Initialise cache headers
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*/
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int
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fdesc_init(vfsp)
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struct vfsconf *vfsp;
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{
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devctty = makedev(nchrdev, 0);
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fdhashtbl = hashinit(NFDCACHE, M_CACHE, &fdhash);
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return (0);
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}
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int
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fdesc_allocvp(ftype, ix, mp, vpp)
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fdntype ftype;
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int ix;
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struct mount *mp;
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struct vnode **vpp;
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{
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struct proc *p = curproc; /* XXX */
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struct fdhashhead *fc;
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struct fdescnode *fd;
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int error = 0;
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fc = FD_NHASH(ix);
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loop:
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for (fd = fc->lh_first; fd != 0; fd = fd->fd_hash.le_next) {
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if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
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if (vget(fd->fd_vnode, 0, p))
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goto loop;
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*vpp = fd->fd_vnode;
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return (error);
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}
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}
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/*
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* otherwise lock the array while we call getnewvnode
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* since that can block.
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*/
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if (fdcache_lock & FDL_LOCKED) {
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fdcache_lock |= FDL_WANT;
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(void) tsleep((caddr_t) &fdcache_lock, PINOD, "fdalvp", 0);
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goto loop;
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}
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fdcache_lock |= FDL_LOCKED;
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/*
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* Do the MALLOC before the getnewvnode since doing so afterward
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* might cause a bogus v_data pointer to get dereferenced
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* elsewhere if MALLOC should block.
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*/
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MALLOC(fd, struct fdescnode *, sizeof(struct fdescnode), M_TEMP, M_WAITOK);
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error = getnewvnode(VT_FDESC, mp, fdesc_vnodeop_p, vpp);
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if (error) {
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FREE(fd, M_TEMP);
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goto out;
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}
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(*vpp)->v_data = fd;
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fd->fd_vnode = *vpp;
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fd->fd_type = ftype;
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fd->fd_fd = -1;
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fd->fd_link = 0;
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fd->fd_ix = ix;
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LIST_INSERT_HEAD(fc, fd, fd_hash);
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out:;
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fdcache_lock &= ~FDL_LOCKED;
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if (fdcache_lock & FDL_WANT) {
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fdcache_lock &= ~FDL_WANT;
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wakeup((caddr_t) &fdcache_lock);
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}
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return (error);
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}
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/*
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* vp is the current namei directory
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* ndp is the name to locate in that directory...
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*/
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static int
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fdesc_lookup(ap)
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struct vop_lookup_args /* {
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struct vnode * a_dvp;
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struct vnode ** a_vpp;
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struct componentname * a_cnp;
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} */ *ap;
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{
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struct vnode **vpp = ap->a_vpp;
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struct vnode *dvp = ap->a_dvp;
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struct componentname *cnp = ap->a_cnp;
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char *pname = cnp->cn_nameptr;
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struct proc *p = cnp->cn_proc;
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int nfiles = p->p_fd->fd_nfiles;
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unsigned fd;
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int error;
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struct vnode *fvp;
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char *ln;
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if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) {
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error = EROFS;
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goto bad;
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}
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VOP_UNLOCK(dvp, 0, p);
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if (cnp->cn_namelen == 1 && *pname == '.') {
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*vpp = dvp;
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VREF(dvp);
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vn_lock(dvp, LK_SHARED | LK_RETRY, p);
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return (0);
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}
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switch (VTOFDESC(dvp)->fd_type) {
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default:
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case Flink:
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case Fdesc:
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case Fctty:
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error = ENOTDIR;
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goto bad;
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case Froot:
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if (cnp->cn_namelen == 2 && bcmp(pname, "fd", 2) == 0) {
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error = fdesc_allocvp(Fdevfd, FD_DEVFD, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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*vpp = fvp;
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fvp->v_type = VDIR;
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vn_lock(fvp, LK_SHARED | LK_RETRY, p);
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return (0);
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}
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if (cnp->cn_namelen == 3 && bcmp(pname, "tty", 3) == 0) {
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struct vnode *ttyvp = cttyvp(p);
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if (ttyvp == NULL) {
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error = ENXIO;
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goto bad;
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}
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error = fdesc_allocvp(Fctty, FD_CTTY, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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*vpp = fvp;
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fvp->v_type = VFIFO;
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vn_lock(fvp, LK_SHARED | LK_RETRY, p);
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return (0);
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}
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ln = 0;
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switch (cnp->cn_namelen) {
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case 5:
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if (bcmp(pname, "stdin", 5) == 0) {
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ln = "fd/0";
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fd = FD_STDIN;
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}
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break;
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case 6:
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if (bcmp(pname, "stdout", 6) == 0) {
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ln = "fd/1";
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fd = FD_STDOUT;
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} else
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if (bcmp(pname, "stderr", 6) == 0) {
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ln = "fd/2";
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fd = FD_STDERR;
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}
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break;
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}
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if (ln) {
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error = fdesc_allocvp(Flink, fd, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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VTOFDESC(fvp)->fd_link = ln;
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*vpp = fvp;
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fvp->v_type = VLNK;
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vn_lock(fvp, LK_SHARED | LK_RETRY, p);
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return (0);
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} else {
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error = ENOENT;
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goto bad;
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}
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/* FALL THROUGH */
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case Fdevfd:
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if (cnp->cn_namelen == 2 && bcmp(pname, "..", 2) == 0) {
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if (error = fdesc_root(dvp->v_mount, vpp))
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goto bad;
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return (0);
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}
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fd = 0;
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while (*pname >= '0' && *pname <= '9') {
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fd = 10 * fd + *pname++ - '0';
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if (fd >= nfiles)
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break;
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}
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if (*pname != '\0') {
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error = ENOENT;
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goto bad;
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}
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if (fd >= nfiles || p->p_fd->fd_ofiles[fd] == NULL) {
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error = EBADF;
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goto bad;
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}
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error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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VTOFDESC(fvp)->fd_fd = fd;
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vn_lock(fvp, LK_SHARED | LK_RETRY, p);
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*vpp = fvp;
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return (0);
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}
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bad:;
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vn_lock(dvp, LK_SHARED | LK_RETRY, p);
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*vpp = NULL;
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return (error);
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}
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static int
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fdesc_open(ap)
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struct vop_open_args /* {
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struct vnode *a_vp;
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int a_mode;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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int error = 0;
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switch (VTOFDESC(vp)->fd_type) {
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case Fdesc:
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/*
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* XXX Kludge: set p->p_dupfd to contain the value of the
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* the file descriptor being sought for duplication. The error
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* return ensures that the vnode for this device will be
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* released by vn_open. Open will detect this special error and
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* take the actions in dupfdopen. Other callers of vn_open or
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* VOP_OPEN will simply report the error.
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*/
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ap->a_p->p_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
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error = ENODEV;
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break;
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case Fctty:
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error = (*ctty_cdevsw.d_open)(devctty, ap->a_mode, 0, ap->a_p);
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break;
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}
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return (error);
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}
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static int
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fdesc_attr(fd, vap, cred, p)
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int fd;
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struct vattr *vap;
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struct ucred *cred;
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struct proc *p;
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{
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struct filedesc *fdp = p->p_fd;
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struct file *fp;
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struct stat stb;
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int error;
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if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL)
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return (EBADF);
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switch (fp->f_type) {
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case DTYPE_FIFO:
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case DTYPE_VNODE:
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error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred, p);
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if (error == 0 && vap->va_type == VDIR) {
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/*
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* directories can cause loops in the namespace,
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* so turn off the 'x' bits to avoid trouble.
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*/
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vap->va_mode &= ~((VEXEC)|(VEXEC>>3)|(VEXEC>>6));
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}
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break;
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case DTYPE_SOCKET:
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error = soo_stat((struct socket *)fp->f_data, &stb);
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if (error == 0) {
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vattr_null(vap);
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vap->va_type = VSOCK;
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vap->va_mode = stb.st_mode;
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vap->va_nlink = stb.st_nlink;
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vap->va_uid = stb.st_uid;
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vap->va_gid = stb.st_gid;
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vap->va_fsid = stb.st_dev;
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vap->va_fileid = stb.st_ino;
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vap->va_size = stb.st_size;
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vap->va_blocksize = stb.st_blksize;
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vap->va_atime = stb.st_atimespec;
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vap->va_mtime = stb.st_mtimespec;
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vap->va_ctime = stb.st_ctimespec;
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vap->va_gen = stb.st_gen;
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vap->va_flags = stb.st_flags;
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vap->va_rdev = stb.st_rdev;
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vap->va_bytes = stb.st_blocks * stb.st_blksize;
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}
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break;
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default:
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panic("fdesc attr");
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break;
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}
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return (error);
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}
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static int
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fdesc_getattr(ap)
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struct vop_getattr_args /* {
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struct vnode *a_vp;
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struct vattr *a_vap;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct vattr *vap = ap->a_vap;
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unsigned fd;
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int error = 0;
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switch (VTOFDESC(vp)->fd_type) {
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case Froot:
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case Fdevfd:
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case Flink:
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case Fctty:
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bzero((caddr_t) vap, sizeof(*vap));
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vattr_null(vap);
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vap->va_fileid = VTOFDESC(vp)->fd_ix;
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switch (VTOFDESC(vp)->fd_type) {
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case Flink:
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vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
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vap->va_type = VLNK;
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vap->va_nlink = 1;
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vap->va_size = strlen(VTOFDESC(vp)->fd_link);
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break;
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case Fctty:
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vap->va_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
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vap->va_type = VFIFO;
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vap->va_nlink = 1;
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vap->va_size = 0;
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break;
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default:
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vap->va_mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
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vap->va_type = VDIR;
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vap->va_nlink = 2;
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vap->va_size = DEV_BSIZE;
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break;
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}
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vap->va_uid = 0;
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vap->va_gid = 0;
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vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
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vap->va_blocksize = DEV_BSIZE;
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vap->va_atime.tv_sec = boottime.tv_sec;
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vap->va_atime.tv_nsec = 0;
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vap->va_mtime = vap->va_atime;
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vap->va_ctime = vap->va_mtime;
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vap->va_gen = 0;
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vap->va_flags = 0;
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vap->va_rdev = 0;
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vap->va_bytes = 0;
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break;
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case Fdesc:
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fd = VTOFDESC(vp)->fd_fd;
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error = fdesc_attr(fd, vap, ap->a_cred, ap->a_p);
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break;
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default:
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panic("fdesc_getattr");
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break;
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}
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if (error == 0)
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vp->v_type = vap->va_type;
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return (error);
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}
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static int
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fdesc_setattr(ap)
|
|
struct vop_setattr_args /* {
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
struct filedesc *fdp = ap->a_p->p_fd;
|
|
struct file *fp;
|
|
unsigned fd;
|
|
int error;
|
|
|
|
/*
|
|
* Can't mess with the root vnode
|
|
*/
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fdesc:
|
|
break;
|
|
|
|
case Fctty:
|
|
return (0);
|
|
|
|
default:
|
|
return (EACCES);
|
|
}
|
|
|
|
fd = VTOFDESC(ap->a_vp)->fd_fd;
|
|
if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL) {
|
|
return (EBADF);
|
|
}
|
|
|
|
/*
|
|
* Can setattr the underlying vnode, but not sockets!
|
|
*/
|
|
switch (fp->f_type) {
|
|
case DTYPE_FIFO:
|
|
case DTYPE_VNODE:
|
|
error = VOP_SETATTR((struct vnode *) fp->f_data, ap->a_vap, ap->a_cred, ap->a_p);
|
|
break;
|
|
|
|
case DTYPE_SOCKET:
|
|
error = 0;
|
|
break;
|
|
|
|
default:
|
|
error = EBADF;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
#define UIO_MX 16
|
|
|
|
static struct dirtmp {
|
|
u_long d_fileno;
|
|
u_short d_reclen;
|
|
u_short d_namlen;
|
|
char d_name[8];
|
|
} rootent[] = {
|
|
{ FD_DEVFD, UIO_MX, 2, "fd" },
|
|
{ FD_STDIN, UIO_MX, 5, "stdin" },
|
|
{ FD_STDOUT, UIO_MX, 6, "stdout" },
|
|
{ FD_STDERR, UIO_MX, 6, "stderr" },
|
|
{ FD_CTTY, UIO_MX, 3, "tty" },
|
|
{ 0 }
|
|
};
|
|
|
|
static int
|
|
fdesc_readdir(ap)
|
|
struct vop_readdir_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
int *a_eofflag;
|
|
u_long *a_cookies;
|
|
int a_ncookies;
|
|
} */ *ap;
|
|
{
|
|
struct uio *uio = ap->a_uio;
|
|
struct filedesc *fdp;
|
|
int i;
|
|
int error;
|
|
|
|
/*
|
|
* We don't allow exporting fdesc mounts, and currently local
|
|
* requests do not need cookies.
|
|
*/
|
|
if (ap->a_ncookies)
|
|
panic("fdesc_readdir: not hungry");
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
return (0);
|
|
|
|
case Fdesc:
|
|
return (ENOTDIR);
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
fdp = uio->uio_procp->p_fd;
|
|
|
|
if (VTOFDESC(ap->a_vp)->fd_type == Froot) {
|
|
struct dirent d;
|
|
struct dirent *dp = &d;
|
|
struct dirtmp *dt;
|
|
|
|
i = uio->uio_offset / UIO_MX;
|
|
error = 0;
|
|
|
|
while (uio->uio_resid > 0) {
|
|
dt = &rootent[i];
|
|
if (dt->d_fileno == 0) {
|
|
/**eofflagp = 1;*/
|
|
break;
|
|
}
|
|
i++;
|
|
|
|
switch (dt->d_fileno) {
|
|
case FD_CTTY:
|
|
if (cttyvp(uio->uio_procp) == NULL)
|
|
continue;
|
|
break;
|
|
|
|
case FD_STDIN:
|
|
case FD_STDOUT:
|
|
case FD_STDERR:
|
|
if ((dt->d_fileno-FD_STDIN) >= fdp->fd_nfiles)
|
|
continue;
|
|
if (fdp->fd_ofiles[dt->d_fileno-FD_STDIN] == NULL)
|
|
continue;
|
|
break;
|
|
}
|
|
bzero((caddr_t) dp, UIO_MX);
|
|
dp->d_fileno = dt->d_fileno;
|
|
dp->d_namlen = dt->d_namlen;
|
|
dp->d_type = DT_UNKNOWN;
|
|
dp->d_reclen = dt->d_reclen;
|
|
bcopy(dt->d_name, dp->d_name, dp->d_namlen+1);
|
|
error = uiomove((caddr_t) dp, UIO_MX, uio);
|
|
if (error)
|
|
break;
|
|
}
|
|
uio->uio_offset = i * UIO_MX;
|
|
return (error);
|
|
}
|
|
|
|
i = uio->uio_offset / UIO_MX;
|
|
error = 0;
|
|
while (uio->uio_resid > 0) {
|
|
if (i >= fdp->fd_nfiles)
|
|
break;
|
|
|
|
if (fdp->fd_ofiles[i] != NULL) {
|
|
struct dirent d;
|
|
struct dirent *dp = &d;
|
|
|
|
bzero((caddr_t) dp, UIO_MX);
|
|
|
|
dp->d_namlen = sprintf(dp->d_name, "%d", i);
|
|
dp->d_reclen = UIO_MX;
|
|
dp->d_type = DT_UNKNOWN;
|
|
dp->d_fileno = i + FD_STDIN;
|
|
/*
|
|
* And ship to userland
|
|
*/
|
|
error = uiomove((caddr_t) dp, UIO_MX, uio);
|
|
if (error)
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
uio->uio_offset = i * UIO_MX;
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
fdesc_readlink(ap)
|
|
struct vop_readlink_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
int error;
|
|
|
|
if (vp->v_type != VLNK)
|
|
return (EPERM);
|
|
|
|
if (VTOFDESC(vp)->fd_type == Flink) {
|
|
char *ln = VTOFDESC(vp)->fd_link;
|
|
error = uiomove(ln, strlen(ln), ap->a_uio);
|
|
} else {
|
|
error = EOPNOTSUPP;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
fdesc_read(ap)
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap;
|
|
{
|
|
int error = EOPNOTSUPP;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
error = (*ctty_cdevsw.d_read)(devctty, ap->a_uio, ap->a_ioflag);
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
fdesc_write(ap)
|
|
struct vop_write_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap;
|
|
{
|
|
int error = EOPNOTSUPP;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
error = (*ctty_cdevsw.d_write)(devctty, ap->a_uio, ap->a_ioflag);
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
fdesc_ioctl(ap)
|
|
struct vop_ioctl_args /* {
|
|
struct vnode *a_vp;
|
|
int a_command;
|
|
caddr_t a_data;
|
|
int a_fflag;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
int error = EOPNOTSUPP;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
error = (*ctty_cdevsw.d_ioctl)(devctty, ap->a_command,
|
|
ap->a_data, ap->a_fflag, ap->a_p);
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
fdesc_poll(ap)
|
|
struct vop_poll_args /* {
|
|
struct vnode *a_vp;
|
|
int a_events;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
int revents;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
revents = (*ctty_cdevsw.d_poll)(devctty, ap->a_events, ap->a_p);
|
|
break;
|
|
|
|
default:
|
|
revents = seltrue(0, ap->a_events, ap->a_p);
|
|
break;
|
|
}
|
|
|
|
return (revents);
|
|
}
|
|
|
|
static int
|
|
fdesc_inactive(ap)
|
|
struct vop_inactive_args /* {
|
|
struct vnode *a_vp;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
/*
|
|
* Clear out the v_type field to avoid
|
|
* nasty things happening in vgone().
|
|
*/
|
|
VOP_UNLOCK(vp, 0, ap->a_p);
|
|
vp->v_type = VNON;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
fdesc_reclaim(ap)
|
|
struct vop_reclaim_args /* {
|
|
struct vnode *a_vp;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct fdescnode *fd = VTOFDESC(vp);
|
|
|
|
LIST_REMOVE(fd, fd_hash);
|
|
FREE(vp->v_data, M_TEMP);
|
|
vp->v_data = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return POSIX pathconf information applicable to special devices.
|
|
*/
|
|
static int
|
|
fdesc_pathconf(ap)
|
|
struct vop_pathconf_args /* {
|
|
struct vnode *a_vp;
|
|
int a_name;
|
|
int *a_retval;
|
|
} */ *ap;
|
|
{
|
|
|
|
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 /dev/fd vnode.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
fdesc_print(ap)
|
|
struct vop_print_args /* {
|
|
struct vnode *a_vp;
|
|
} */ *ap;
|
|
{
|
|
|
|
printf("tag VT_NON, fdesc vnode\n");
|
|
return (0);
|
|
}
|
|
|
|
/*void*/
|
|
static int
|
|
fdesc_vfree(ap)
|
|
struct vop_vfree_args /* {
|
|
struct vnode *a_pvp;
|
|
ino_t a_ino;
|
|
int a_mode;
|
|
} */ *ap;
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* /dev/fd "should never get here" operation
|
|
*/
|
|
static int
|
|
fdesc_badop()
|
|
{
|
|
|
|
panic("fdesc: bad op");
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
#define fdesc_create ((int (*) __P((struct vop_create_args *)))eopnotsupp)
|
|
#define fdesc_mknod ((int (*) __P((struct vop_mknod_args *)))eopnotsupp)
|
|
#define fdesc_close ((int (*) __P((struct vop_close_args *)))nullop)
|
|
#define fdesc_access ((int (*) __P((struct vop_access_args *)))nullop)
|
|
#define fdesc_mmap ((int (*) __P((struct vop_mmap_args *)))eopnotsupp)
|
|
#define fdesc_revoke vop_revoke
|
|
#define fdesc_fsync ((int (*) __P((struct vop_fsync_args *)))nullop)
|
|
#define fdesc_seek ((int (*) __P((struct vop_seek_args *)))nullop)
|
|
#define fdesc_remove ((int (*) __P((struct vop_remove_args *)))eopnotsupp)
|
|
#define fdesc_link ((int (*) __P((struct vop_link_args *)))eopnotsupp)
|
|
#define fdesc_rename ((int (*) __P((struct vop_rename_args *)))eopnotsupp)
|
|
#define fdesc_mkdir ((int (*) __P((struct vop_mkdir_args *)))eopnotsupp)
|
|
#define fdesc_rmdir ((int (*) __P((struct vop_rmdir_args *)))eopnotsupp)
|
|
#define fdesc_symlink ((int (*) __P((struct vop_symlink_args *)))eopnotsupp)
|
|
#define fdesc_abortop ((int (*) __P((struct vop_abortop_args *)))nullop)
|
|
#define fdesc_lock ((int (*) __P((struct vop_lock_args *)))vop_nolock)
|
|
#define fdesc_unlock ((int (*) __P((struct vop_unlock_args *)))vop_nounlock)
|
|
#define fdesc_bmap ((int (*) __P((struct vop_bmap_args *)))fdesc_badop)
|
|
#define fdesc_strategy ((int (*) __P((struct vop_strategy_args *)))fdesc_badop)
|
|
#define fdesc_islocked \
|
|
((int (*) __P((struct vop_islocked_args *)))vop_noislocked)
|
|
#define fdesc_advlock ((int (*) __P((struct vop_advlock_args *)))eopnotsupp)
|
|
#define fdesc_blkatoff \
|
|
((int (*) __P((struct vop_blkatoff_args *)))eopnotsupp)
|
|
#define fdesc_valloc ((int(*) __P(( \
|
|
struct vnode *pvp, \
|
|
int mode, \
|
|
struct ucred *cred, \
|
|
struct vnode **vpp))) eopnotsupp)
|
|
#define fdesc_truncate \
|
|
((int (*) __P((struct vop_truncate_args *)))eopnotsupp)
|
|
#define fdesc_update ((int (*) __P((struct vop_update_args *)))eopnotsupp)
|
|
#define fdesc_bwrite ((int (*) __P((struct vop_bwrite_args *)))eopnotsupp)
|
|
|
|
static struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *)vn_default_error },
|
|
{ &vop_lookup_desc, (vop_t *)fdesc_lookup }, /* lookup */
|
|
/* XXX: vop_cachedlookup */
|
|
{ &vop_create_desc, (vop_t *)fdesc_create }, /* create */
|
|
/* XXX: vop_whiteout */
|
|
{ &vop_mknod_desc, (vop_t *)fdesc_mknod }, /* mknod */
|
|
{ &vop_open_desc, (vop_t *)fdesc_open }, /* open */
|
|
{ &vop_close_desc, (vop_t *)fdesc_close }, /* close */
|
|
{ &vop_access_desc, (vop_t *)fdesc_access }, /* access */
|
|
{ &vop_getattr_desc, (vop_t *)fdesc_getattr }, /* getattr */
|
|
{ &vop_setattr_desc, (vop_t *)fdesc_setattr }, /* setattr */
|
|
{ &vop_read_desc, (vop_t *)fdesc_read }, /* read */
|
|
/* XXX: vop_lease */
|
|
{ &vop_write_desc, (vop_t *)fdesc_write }, /* write */
|
|
{ &vop_ioctl_desc, (vop_t *)fdesc_ioctl }, /* ioctl */
|
|
{ &vop_poll_desc, (vop_t *)fdesc_poll }, /* poll */
|
|
{ &vop_revoke_desc, (vop_t *)fdesc_revoke }, /* revoke */
|
|
{ &vop_mmap_desc, (vop_t *)fdesc_mmap }, /* mmap */
|
|
{ &vop_fsync_desc, (vop_t *)fdesc_fsync }, /* fsync */
|
|
{ &vop_seek_desc, (vop_t *)fdesc_seek }, /* seek */
|
|
{ &vop_remove_desc, (vop_t *)fdesc_remove }, /* remove */
|
|
{ &vop_link_desc, (vop_t *)fdesc_link }, /* link */
|
|
{ &vop_rename_desc, (vop_t *)fdesc_rename }, /* rename */
|
|
{ &vop_mkdir_desc, (vop_t *)fdesc_mkdir }, /* mkdir */
|
|
{ &vop_rmdir_desc, (vop_t *)fdesc_rmdir }, /* rmdir */
|
|
{ &vop_symlink_desc, (vop_t *)fdesc_symlink }, /* symlink */
|
|
{ &vop_readdir_desc, (vop_t *)fdesc_readdir }, /* readdir */
|
|
{ &vop_readlink_desc, (vop_t *)fdesc_readlink }, /* readlink */
|
|
{ &vop_abortop_desc, (vop_t *)fdesc_abortop }, /* abortop */
|
|
{ &vop_inactive_desc, (vop_t *)fdesc_inactive }, /* inactive */
|
|
{ &vop_reclaim_desc, (vop_t *)fdesc_reclaim }, /* reclaim */
|
|
{ &vop_lock_desc, (vop_t *)fdesc_lock }, /* lock */
|
|
{ &vop_unlock_desc, (vop_t *)fdesc_unlock }, /* unlock */
|
|
{ &vop_bmap_desc, (vop_t *)fdesc_bmap }, /* bmap */
|
|
{ &vop_strategy_desc, (vop_t *)fdesc_strategy }, /* strategy */
|
|
{ &vop_print_desc, (vop_t *)fdesc_print }, /* print */
|
|
{ &vop_islocked_desc, (vop_t *)fdesc_islocked }, /* islocked */
|
|
{ &vop_pathconf_desc, (vop_t *)fdesc_pathconf }, /* pathconf */
|
|
{ &vop_advlock_desc, (vop_t *)fdesc_advlock }, /* advlock */
|
|
{ &vop_blkatoff_desc, (vop_t *)fdesc_blkatoff }, /* blkatoff */
|
|
{ &vop_valloc_desc, (vop_t *)fdesc_valloc }, /* valloc */
|
|
/* XXX: vop_reallocblks */
|
|
{ &vop_vfree_desc, (vop_t *)fdesc_vfree }, /* vfree */
|
|
{ &vop_truncate_desc, (vop_t *)fdesc_truncate }, /* truncate */
|
|
{ &vop_update_desc, (vop_t *)fdesc_update }, /* update */
|
|
/* XXX: vop_getpages */
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/* XXX: vop_putpages */
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{ &vop_bwrite_desc, (vop_t *)fdesc_bwrite }, /* bwrite */
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|
{ NULL, NULL }
|
|
};
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|
static struct vnodeopv_desc fdesc_vnodeop_opv_desc =
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{ &fdesc_vnodeop_p, fdesc_vnodeop_entries };
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|
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VNODEOP_SET(fdesc_vnodeop_opv_desc);
|