1994-05-24 10:09:53 +00:00
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/*
|
1997-02-10 02:22:35 +00:00
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* Copyright (c) 1990, 1993, 1995
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1994-05-24 10:09:53 +00:00
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* The Regents of the University of California. All rights reserved.
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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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1997-02-10 02:22:35 +00:00
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* @(#)fifo_vnops.c 8.10 (Berkeley) 5/27/95
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1999-08-28 01:08:13 +00:00
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* $FreeBSD$
|
1994-05-24 10:09:53 +00:00
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|
*/
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#include <sys/param.h>
|
1997-02-10 02:22:35 +00:00
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|
#include <sys/systm.h>
|
1997-12-13 12:58:09 +00:00
|
|
|
#include <sys/unistd.h>
|
1997-02-12 16:26:37 +00:00
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|
|
#include <sys/kernel.h>
|
1997-12-05 19:55:52 +00:00
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|
|
#include <sys/lock.h>
|
1997-10-12 20:26:33 +00:00
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|
#include <sys/malloc.h>
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1994-05-24 10:09:53 +00:00
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|
|
#include <sys/vnode.h>
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|
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#include <sys/socket.h>
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#include <sys/socketvar.h>
|
1997-03-24 11:37:53 +00:00
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|
|
#include <sys/filio.h>
|
1997-03-23 03:37:54 +00:00
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|
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#include <sys/fcntl.h>
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1994-05-24 10:09:53 +00:00
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#include <sys/file.h>
|
1997-09-14 02:58:12 +00:00
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#include <sys/poll.h>
|
1995-03-16 18:17:34 +00:00
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|
|
#include <sys/un.h>
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1994-05-24 10:09:53 +00:00
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#include <miscfs/fifofs/fifo.h>
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/*
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* This structure is associated with the FIFO vnode and stores
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* the state associated with the FIFO.
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*/
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struct fifoinfo {
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struct socket *fi_readsock;
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|
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struct socket *fi_writesock;
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long fi_readers;
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long fi_writers;
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};
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|
1997-10-15 13:24:07 +00:00
|
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static int fifo_badop __P((void));
|
1995-12-14 09:55:16 +00:00
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static int fifo_print __P((struct vop_print_args *));
|
1997-10-15 13:24:07 +00:00
|
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static int fifo_lookup __P((struct vop_lookup_args *));
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static int fifo_open __P((struct vop_open_args *));
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static int fifo_close __P((struct vop_close_args *));
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static int fifo_read __P((struct vop_read_args *));
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static int fifo_write __P((struct vop_write_args *));
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|
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static int fifo_ioctl __P((struct vop_ioctl_args *));
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static int fifo_poll __P((struct vop_poll_args *));
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|
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static int fifo_inactive __P((struct vop_inactive_args *));
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|
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static int fifo_bmap __P((struct vop_bmap_args *));
|
1997-12-13 12:58:09 +00:00
|
|
|
static int fifo_pathconf __P((struct vop_pathconf_args *));
|
1997-10-15 13:24:07 +00:00
|
|
|
static int fifo_advlock __P((struct vop_advlock_args *));
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|
|
1995-12-14 09:55:16 +00:00
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|
|
1995-11-09 08:17:23 +00:00
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|
vop_t **fifo_vnodeop_p;
|
1995-12-14 09:55:16 +00:00
|
|
|
static struct vnodeopv_entry_desc fifo_vnodeop_entries[] = {
|
1997-10-26 20:55:39 +00:00
|
|
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{ &vop_default_desc, (vop_t *) vop_defaultop },
|
1997-10-15 13:24:07 +00:00
|
|
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{ &vop_abortop_desc, (vop_t *) fifo_badop },
|
1997-10-26 20:55:39 +00:00
|
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{ &vop_access_desc, (vop_t *) vop_ebadf },
|
1997-10-15 09:22:02 +00:00
|
|
|
{ &vop_advlock_desc, (vop_t *) fifo_advlock },
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|
|
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{ &vop_bmap_desc, (vop_t *) fifo_bmap },
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|
|
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{ &vop_close_desc, (vop_t *) fifo_close },
|
1997-10-15 13:24:07 +00:00
|
|
|
{ &vop_create_desc, (vop_t *) fifo_badop },
|
1997-10-26 20:55:39 +00:00
|
|
|
{ &vop_getattr_desc, (vop_t *) vop_ebadf },
|
1997-10-15 10:05:29 +00:00
|
|
|
{ &vop_inactive_desc, (vop_t *) fifo_inactive },
|
1997-10-15 09:22:02 +00:00
|
|
|
{ &vop_ioctl_desc, (vop_t *) fifo_ioctl },
|
1997-10-26 20:55:39 +00:00
|
|
|
{ &vop_lease_desc, (vop_t *) vop_null },
|
1997-10-15 13:24:07 +00:00
|
|
|
{ &vop_link_desc, (vop_t *) fifo_badop },
|
1997-10-15 09:22:02 +00:00
|
|
|
{ &vop_lookup_desc, (vop_t *) fifo_lookup },
|
1997-10-15 13:24:07 +00:00
|
|
|
{ &vop_mkdir_desc, (vop_t *) fifo_badop },
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|
|
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{ &vop_mknod_desc, (vop_t *) fifo_badop },
|
1997-10-15 09:22:02 +00:00
|
|
|
{ &vop_open_desc, (vop_t *) fifo_open },
|
1997-12-13 12:58:09 +00:00
|
|
|
{ &vop_pathconf_desc, (vop_t *) fifo_pathconf },
|
1997-10-15 09:22:02 +00:00
|
|
|
{ &vop_poll_desc, (vop_t *) fifo_poll },
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|
|
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{ &vop_print_desc, (vop_t *) fifo_print },
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|
|
|
{ &vop_read_desc, (vop_t *) fifo_read },
|
1997-10-15 13:24:07 +00:00
|
|
|
{ &vop_readdir_desc, (vop_t *) fifo_badop },
|
|
|
|
{ &vop_readlink_desc, (vop_t *) fifo_badop },
|
|
|
|
{ &vop_reallocblks_desc, (vop_t *) fifo_badop },
|
1997-10-26 20:55:39 +00:00
|
|
|
{ &vop_reclaim_desc, (vop_t *) vop_null },
|
1997-10-15 13:24:07 +00:00
|
|
|
{ &vop_remove_desc, (vop_t *) fifo_badop },
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|
|
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{ &vop_rename_desc, (vop_t *) fifo_badop },
|
|
|
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{ &vop_rmdir_desc, (vop_t *) fifo_badop },
|
1997-10-26 20:55:39 +00:00
|
|
|
{ &vop_setattr_desc, (vop_t *) vop_ebadf },
|
1997-10-15 13:24:07 +00:00
|
|
|
{ &vop_symlink_desc, (vop_t *) fifo_badop },
|
1997-10-15 09:22:02 +00:00
|
|
|
{ &vop_write_desc, (vop_t *) fifo_write },
|
1995-11-09 08:17:23 +00:00
|
|
|
{ NULL, NULL }
|
1994-05-24 10:09:53 +00:00
|
|
|
};
|
1995-12-14 09:55:16 +00:00
|
|
|
static struct vnodeopv_desc fifo_vnodeop_opv_desc =
|
1994-05-24 10:09:53 +00:00
|
|
|
{ &fifo_vnodeop_p, fifo_vnodeop_entries };
|
|
|
|
|
1994-09-21 03:47:43 +00:00
|
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|
VNODEOP_SET(fifo_vnodeop_opv_desc);
|
|
|
|
|
1997-10-15 13:24:07 +00:00
|
|
|
int
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|
|
|
fifo_vnoperate(ap)
|
|
|
|
struct vop_generic_args /* {
|
|
|
|
struct vnodeop_desc *a_desc;
|
|
|
|
<other random data follows, presumably>
|
|
|
|
} */ *ap;
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|
|
|
{
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|
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|
return (VOCALL(fifo_vnodeop_p, ap->a_desc->vdesc_offset, ap));
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|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* Trivial lookup routine that always fails.
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_lookup(ap)
|
|
|
|
struct vop_lookup_args /* {
|
|
|
|
struct vnode * a_dvp;
|
|
|
|
struct vnode ** a_vpp;
|
|
|
|
struct componentname * a_cnp;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
1995-05-30 08:16:23 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
*ap->a_vpp = NULL;
|
|
|
|
return (ENOTDIR);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Open called to set up a new instance of a fifo or
|
|
|
|
* to find an active instance of a fifo.
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_open(ap)
|
|
|
|
struct vop_open_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
int a_mode;
|
|
|
|
struct ucred *a_cred;
|
|
|
|
struct proc *a_p;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
1997-02-10 02:22:35 +00:00
|
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
struct fifoinfo *fip;
|
|
|
|
struct proc *p = ap->a_p;
|
1994-05-24 10:09:53 +00:00
|
|
|
struct socket *rso, *wso;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if ((fip = vp->v_fifoinfo) == NULL) {
|
|
|
|
MALLOC(fip, struct fifoinfo *, sizeof(*fip), M_VNODE, M_WAITOK);
|
|
|
|
vp->v_fifoinfo = fip;
|
1997-02-10 02:22:35 +00:00
|
|
|
error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0, ap->a_p);
|
1994-10-02 17:48:58 +00:00
|
|
|
if (error) {
|
1994-05-24 10:09:53 +00:00
|
|
|
free(fip, M_VNODE);
|
|
|
|
vp->v_fifoinfo = NULL;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
fip->fi_readsock = rso;
|
1997-02-10 02:22:35 +00:00
|
|
|
error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0, ap->a_p);
|
1994-10-02 17:48:58 +00:00
|
|
|
if (error) {
|
1994-05-24 10:09:53 +00:00
|
|
|
(void)soclose(rso);
|
|
|
|
free(fip, M_VNODE);
|
|
|
|
vp->v_fifoinfo = NULL;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
fip->fi_writesock = wso;
|
1995-05-30 08:16:23 +00:00
|
|
|
error = unp_connect2(wso, rso);
|
1994-10-02 17:48:58 +00:00
|
|
|
if (error) {
|
1994-05-24 10:09:53 +00:00
|
|
|
(void)soclose(wso);
|
|
|
|
(void)soclose(rso);
|
|
|
|
free(fip, M_VNODE);
|
|
|
|
vp->v_fifoinfo = NULL;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
fip->fi_readers = fip->fi_writers = 0;
|
1997-12-19 18:58:14 +00:00
|
|
|
wso->so_snd.sb_lowat = PIPE_BUF;
|
1997-12-13 13:49:59 +00:00
|
|
|
rso->so_state |= SS_CANTRCVMORE;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
1997-02-10 02:22:35 +00:00
|
|
|
if (ap->a_mode & FREAD) {
|
|
|
|
fip->fi_readers++;
|
|
|
|
if (fip->fi_readers == 1) {
|
1995-08-06 16:14:21 +00:00
|
|
|
fip->fi_writesock->so_state &= ~SS_CANTSENDMORE;
|
|
|
|
if (fip->fi_writers > 0)
|
|
|
|
wakeup((caddr_t)&fip->fi_writers);
|
|
|
|
}
|
1997-02-10 02:22:35 +00:00
|
|
|
}
|
|
|
|
if (ap->a_mode & FWRITE) {
|
|
|
|
fip->fi_writers++;
|
|
|
|
if (fip->fi_writers == 1) {
|
1995-08-06 16:14:21 +00:00
|
|
|
fip->fi_readsock->so_state &= ~SS_CANTRCVMORE;
|
|
|
|
if (fip->fi_readers > 0)
|
|
|
|
wakeup((caddr_t)&fip->fi_readers);
|
|
|
|
}
|
|
|
|
}
|
1997-02-10 02:22:35 +00:00
|
|
|
if ((ap->a_mode & FREAD) && (ap->a_mode & O_NONBLOCK) == 0) {
|
|
|
|
while (fip->fi_writers == 0) {
|
|
|
|
VOP_UNLOCK(vp, 0, p);
|
|
|
|
error = tsleep((caddr_t)&fip->fi_readers,
|
1997-10-27 15:33:04 +00:00
|
|
|
PCATCH | PSOCK, "fifoor", 0);
|
1997-02-10 02:22:35 +00:00
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
|
|
if (error)
|
|
|
|
goto bad;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
1995-08-06 16:14:21 +00:00
|
|
|
}
|
1997-02-10 02:22:35 +00:00
|
|
|
if (ap->a_mode & FWRITE) {
|
|
|
|
if (ap->a_mode & O_NONBLOCK) {
|
|
|
|
if (fip->fi_readers == 0) {
|
|
|
|
error = ENXIO;
|
|
|
|
goto bad;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
1997-02-10 02:22:35 +00:00
|
|
|
} else {
|
1994-05-24 10:09:53 +00:00
|
|
|
while (fip->fi_readers == 0) {
|
1997-02-10 02:22:35 +00:00
|
|
|
VOP_UNLOCK(vp, 0, p);
|
1994-05-24 10:09:53 +00:00
|
|
|
error = tsleep((caddr_t)&fip->fi_writers,
|
1997-10-27 15:33:04 +00:00
|
|
|
PCATCH | PSOCK, "fifoow", 0);
|
1997-02-10 02:22:35 +00:00
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
1994-05-24 10:09:53 +00:00
|
|
|
if (error)
|
1997-02-10 02:22:35 +00:00
|
|
|
goto bad;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
1997-02-10 02:22:35 +00:00
|
|
|
return (0);
|
|
|
|
bad:
|
|
|
|
VOP_CLOSE(vp, ap->a_mode, ap->a_cred, p);
|
1994-05-24 10:09:53 +00:00
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Vnode op for read
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_read(ap)
|
|
|
|
struct vop_read_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
struct uio *a_uio;
|
|
|
|
int a_ioflag;
|
|
|
|
struct ucred *a_cred;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
1997-02-10 02:22:35 +00:00
|
|
|
struct uio *uio = ap->a_uio;
|
|
|
|
struct socket *rso = ap->a_vp->v_fifoinfo->fi_readsock;
|
|
|
|
struct proc *p = uio->uio_procp;
|
1994-05-24 10:09:53 +00:00
|
|
|
int error, startresid;
|
|
|
|
|
|
|
|
#ifdef DIAGNOSTIC
|
|
|
|
if (uio->uio_rw != UIO_READ)
|
|
|
|
panic("fifo_read mode");
|
|
|
|
#endif
|
|
|
|
if (uio->uio_resid == 0)
|
|
|
|
return (0);
|
|
|
|
if (ap->a_ioflag & IO_NDELAY)
|
|
|
|
rso->so_state |= SS_NBIO;
|
|
|
|
startresid = uio->uio_resid;
|
1997-02-10 02:22:35 +00:00
|
|
|
VOP_UNLOCK(ap->a_vp, 0, p);
|
1997-08-16 19:16:27 +00:00
|
|
|
error = soreceive(rso, (struct sockaddr **)0, uio, (struct mbuf **)0,
|
1997-02-10 02:22:35 +00:00
|
|
|
(struct mbuf **)0, (int *)0);
|
|
|
|
vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, p);
|
1994-05-24 10:09:53 +00:00
|
|
|
if (ap->a_ioflag & IO_NDELAY)
|
|
|
|
rso->so_state &= ~SS_NBIO;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Vnode op for write
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_write(ap)
|
|
|
|
struct vop_write_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
struct uio *a_uio;
|
|
|
|
int a_ioflag;
|
|
|
|
struct ucred *a_cred;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
|
|
|
struct socket *wso = ap->a_vp->v_fifoinfo->fi_writesock;
|
1997-02-10 02:22:35 +00:00
|
|
|
struct proc *p = ap->a_uio->uio_procp;
|
1994-05-24 10:09:53 +00:00
|
|
|
int error;
|
|
|
|
|
|
|
|
#ifdef DIAGNOSTIC
|
|
|
|
if (ap->a_uio->uio_rw != UIO_WRITE)
|
|
|
|
panic("fifo_write mode");
|
|
|
|
#endif
|
|
|
|
if (ap->a_ioflag & IO_NDELAY)
|
|
|
|
wso->so_state |= SS_NBIO;
|
1997-02-10 02:22:35 +00:00
|
|
|
VOP_UNLOCK(ap->a_vp, 0, p);
|
1997-08-16 19:16:27 +00:00
|
|
|
error = sosend(wso, (struct sockaddr *)0, ap->a_uio, 0,
|
|
|
|
(struct mbuf *)0, 0, p);
|
1997-02-10 02:22:35 +00:00
|
|
|
vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, p);
|
1994-05-24 10:09:53 +00:00
|
|
|
if (ap->a_ioflag & IO_NDELAY)
|
|
|
|
wso->so_state &= ~SS_NBIO;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Device ioctl operation.
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_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;
|
|
|
|
{
|
|
|
|
struct file filetmp;
|
1997-02-10 02:22:35 +00:00
|
|
|
int error;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
if (ap->a_command == FIONBIO)
|
|
|
|
return (0);
|
1997-02-10 02:22:35 +00:00
|
|
|
if (ap->a_fflag & FREAD) {
|
1994-05-24 10:09:53 +00:00
|
|
|
filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_readsock;
|
1997-02-10 02:22:35 +00:00
|
|
|
error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_p);
|
|
|
|
if (error)
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
if (ap->a_fflag & FWRITE) {
|
1994-05-24 10:09:53 +00:00
|
|
|
filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_writesock;
|
1997-02-10 02:22:35 +00:00
|
|
|
error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_p);
|
|
|
|
if (error)
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
return (0);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1997-09-14 02:58:12 +00:00
|
|
|
fifo_poll(ap)
|
|
|
|
struct vop_poll_args /* {
|
1994-05-24 10:09:53 +00:00
|
|
|
struct vnode *a_vp;
|
1997-09-14 02:58:12 +00:00
|
|
|
int a_events;
|
1994-05-24 10:09:53 +00:00
|
|
|
struct ucred *a_cred;
|
|
|
|
struct proc *a_p;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
|
|
|
struct file filetmp;
|
1997-09-14 02:58:12 +00:00
|
|
|
int revents = 0;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-09-14 02:58:12 +00:00
|
|
|
if (ap->a_events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) {
|
1994-05-24 10:09:53 +00:00
|
|
|
filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_readsock;
|
1997-09-14 02:58:12 +00:00
|
|
|
if (filetmp.f_data)
|
|
|
|
revents |= soo_poll(&filetmp, ap->a_events, ap->a_cred,
|
|
|
|
ap->a_p);
|
1997-02-10 02:22:35 +00:00
|
|
|
}
|
1997-09-14 02:58:12 +00:00
|
|
|
if (ap->a_events & (POLLOUT | POLLWRNORM | POLLWRBAND)) {
|
1994-05-24 10:09:53 +00:00
|
|
|
filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_writesock;
|
1997-09-14 02:58:12 +00:00
|
|
|
if (filetmp.f_data)
|
|
|
|
revents |= soo_poll(&filetmp, ap->a_events, ap->a_cred,
|
|
|
|
ap->a_p);
|
1997-02-10 02:22:35 +00:00
|
|
|
}
|
1997-09-14 02:58:12 +00:00
|
|
|
return (revents);
|
1997-02-10 02:22:35 +00:00
|
|
|
}
|
|
|
|
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1997-02-10 02:22:35 +00:00
|
|
|
fifo_inactive(ap)
|
|
|
|
struct vop_inactive_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
struct proc *a_p;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
|
|
|
|
|
|
|
VOP_UNLOCK(ap->a_vp, 0, ap->a_p);
|
|
|
|
return (0);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is a noop, simply returning what one has been given.
|
|
|
|
*/
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_bmap(ap)
|
|
|
|
struct vop_bmap_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
daddr_t a_bn;
|
|
|
|
struct vnode **a_vpp;
|
|
|
|
daddr_t *a_bnp;
|
1995-09-04 00:21:16 +00:00
|
|
|
int *a_runp;
|
|
|
|
int *a_runb;
|
1994-05-24 10:09:53 +00:00
|
|
|
} */ *ap;
|
|
|
|
{
|
|
|
|
|
|
|
|
if (ap->a_vpp != NULL)
|
|
|
|
*ap->a_vpp = ap->a_vp;
|
|
|
|
if (ap->a_bnp != NULL)
|
|
|
|
*ap->a_bnp = ap->a_bn;
|
1995-02-03 06:46:28 +00:00
|
|
|
if (ap->a_runp != NULL)
|
|
|
|
*ap->a_runp = 0;
|
1995-09-04 00:21:16 +00:00
|
|
|
if (ap->a_runb != NULL)
|
|
|
|
*ap->a_runb = 0;
|
1994-05-24 10:09:53 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Device close routine
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_close(ap)
|
|
|
|
struct vop_close_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
int a_fflag;
|
|
|
|
struct ucred *a_cred;
|
|
|
|
struct proc *a_p;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
|
|
|
register struct vnode *vp = ap->a_vp;
|
|
|
|
register struct fifoinfo *fip = vp->v_fifoinfo;
|
|
|
|
int error1, error2;
|
|
|
|
|
1995-08-06 16:14:21 +00:00
|
|
|
if (ap->a_fflag & FREAD) {
|
1994-05-24 10:09:53 +00:00
|
|
|
fip->fi_readers--;
|
|
|
|
if (fip->fi_readers == 0)
|
|
|
|
socantsendmore(fip->fi_writesock);
|
|
|
|
}
|
1997-02-10 02:22:35 +00:00
|
|
|
if (ap->a_fflag & FWRITE) {
|
|
|
|
fip->fi_writers--;
|
|
|
|
if (fip->fi_writers == 0)
|
|
|
|
socantrcvmore(fip->fi_readsock);
|
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
if (vp->v_usecount > 1)
|
|
|
|
return (0);
|
|
|
|
error1 = soclose(fip->fi_readsock);
|
|
|
|
error2 = soclose(fip->fi_writesock);
|
|
|
|
FREE(fip, M_VNODE);
|
|
|
|
vp->v_fifoinfo = NULL;
|
|
|
|
if (error1)
|
|
|
|
return (error1);
|
|
|
|
return (error2);
|
|
|
|
}
|
|
|
|
|
1994-10-02 17:48:58 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
1994-10-02 17:48:58 +00:00
|
|
|
* Print out internal contents of a fifo vnode.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
1994-05-25 09:21:21 +00:00
|
|
|
int
|
1994-10-02 17:48:58 +00:00
|
|
|
fifo_printinfo(vp)
|
|
|
|
struct vnode *vp;
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
1994-10-02 17:48:58 +00:00
|
|
|
register struct fifoinfo *fip = vp->v_fifoinfo;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1994-10-02 17:48:58 +00:00
|
|
|
printf(", fifo with %ld readers and %ld writers",
|
|
|
|
fip->fi_readers, fip->fi_writers);
|
1994-05-25 09:21:21 +00:00
|
|
|
return (0);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
1994-10-02 17:48:58 +00:00
|
|
|
* Print out the contents of a fifo vnode.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
1995-12-14 09:55:16 +00:00
|
|
|
static int
|
1994-10-02 17:48:58 +00:00
|
|
|
fifo_print(ap)
|
|
|
|
struct vop_print_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
} */ *ap;
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
|
|
|
|
1994-10-02 17:48:58 +00:00
|
|
|
printf("tag VT_NON");
|
|
|
|
fifo_printinfo(ap->a_vp);
|
|
|
|
printf("\n");
|
1994-05-25 09:21:21 +00:00
|
|
|
return (0);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
1997-12-13 12:58:09 +00:00
|
|
|
/*
|
|
|
|
* Return POSIX pathconf information applicable to fifo's.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
fifo_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_PIPE_BUF:
|
|
|
|
*ap->a_retval = PIPE_BUF;
|
|
|
|
return (0);
|
|
|
|
case _PC_CHOWN_RESTRICTED:
|
|
|
|
*ap->a_retval = 1;
|
|
|
|
return (0);
|
|
|
|
default:
|
|
|
|
return (EINVAL);
|
|
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* Fifo advisory byte-level locks.
|
|
|
|
*/
|
|
|
|
/* ARGSUSED */
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_advlock(ap)
|
|
|
|
struct vop_advlock_args /* {
|
|
|
|
struct vnode *a_vp;
|
|
|
|
caddr_t a_id;
|
|
|
|
int a_op;
|
|
|
|
struct flock *a_fl;
|
|
|
|
int a_flags;
|
|
|
|
} */ *ap;
|
|
|
|
{
|
|
|
|
|
1996-12-19 18:16:33 +00:00
|
|
|
return (ap->a_flags & F_FLOCK ? EOPNOTSUPP : EINVAL);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Fifo bad operation
|
|
|
|
*/
|
1997-10-15 13:24:07 +00:00
|
|
|
static int
|
1994-05-24 10:09:53 +00:00
|
|
|
fifo_badop()
|
|
|
|
{
|
|
|
|
|
|
|
|
panic("fifo_badop called");
|
|
|
|
/* NOTREACHED */
|
|
|
|
}
|