PERFORCE change 163649 for review
Zhao Shuai
zhaoshuai at FreeBSD.org
Sat Jun 6 13:15:06 UTC 2009
http://perforce.freebsd.org/chv.cgi?CH=163649
Change 163649 by zhaoshuai at zhaoshuai on 2009/06/06 13:14:10
fifoinfo now contains rpipe and wpipe
fix a bug in fifo_close
Affected files ...
.. //depot/projects/soc2009/fifo/sys/fs/fifofs/fifo_vnops.c#7 edit
Differences ...
==== //depot/projects/soc2009/fifo/sys/fs/fifofs/fifo_vnops.c#7 (text+ko) ====
@@ -3,6 +3,9 @@
* The Regents of the University of California.
* Copyright (c) 2005 Robert N. M. Watson
* All rights reserved.
+ *
+ * Copyright (c) 2009 Zhao Shuai <zhaoshuai at FreeBSD.org>
+ * Google Summer of Code project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -29,50 +32,39 @@
* SUCH DAMAGE.
*
* @(#)fifo_vnops.c 8.10 (Berkeley) 5/27/95
- * $FreeBSD: src/sys/fs/fifofs/fifo_vnops.c,v 1.149 2009/04/10 10:52:19 rwatson Exp $
+ *
*/
#include <sys/param.h>
-#include <sys/event.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/filio.h>
#include <sys/fcntl.h>
-#include <sys/kernel.h>
-#include <sys/lock.h>
#include <sys/mutex.h>
-#include <sys/malloc.h>
-#include <sys/poll.h>
-#include <sys/proc.h>
-#include <sys/signalvar.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/sx.h>
-#include <sys/systm.h>
-#include <sys/un.h>
#include <sys/unistd.h>
#include <sys/vnode.h>
+#include <sys/pipe.h>
#include <fs/fifofs/fifo.h>
-static fo_rdwr_t fifo_read_f;
-static fo_rdwr_t fifo_write_f;
-static fo_ioctl_t fifo_ioctl_f;
-static fo_poll_t fifo_poll_f;
-static fo_kqfilter_t fifo_kqfilter_f;
-static fo_stat_t fifo_stat_f;
-static fo_close_t fifo_close_f;
-static fo_truncate_t fifo_truncate_f;
+static fo_rdwr_t fifo_read_f;
+static fo_rdwr_t fifo_write_f;
+static fo_ioctl_t fifo_ioctl_f;
+static fo_poll_t fifo_poll_f;
+static fo_kqfilter_t fifo_kqfilter_f;
+static fo_stat_t fifo_stat_f;
+static fo_close_t fifo_close_f;
+static fo_truncate_t fifo_truncate_f;
struct fileops fifo_ops_f = {
- .fo_read = fifo_read_f,
- .fo_write = fifo_write_f,
- .fo_truncate = fifo_truncate_f,
- .fo_ioctl = fifo_ioctl_f,
- .fo_poll = fifo_poll_f,
- .fo_kqfilter = fifo_kqfilter_f,
- .fo_stat = fifo_stat_f,
- .fo_close = fifo_close_f,
- .fo_flags = DFLAG_PASSABLE
+ .fo_read = fifo_read_f,
+ .fo_write = fifo_write_f,
+ .fo_truncate = fifo_truncate_f,
+ .fo_ioctl = fifo_ioctl_f,
+ .fo_poll = fifo_poll_f,
+ .fo_kqfilter = fifo_kqfilter_f,
+ .fo_stat = fifo_stat_f,
+ .fo_close = fifo_close_f,
+ .fo_flags = DFLAG_PASSABLE
};
/*
@@ -80,8 +72,8 @@
* the state associated with the FIFO.
*/
struct fifoinfo {
- struct socket *fi_readsock;
- struct socket *fi_writesock;
+ struct pipe *fi_rpipe;
+ struct pipe *fi_wpipe;
long fi_readers;
long fi_writers;
};
@@ -94,23 +86,8 @@
static vop_pathconf_t fifo_pathconf;
static vop_advlock_t fifo_advlock;
-static void filt_fifordetach(struct knote *kn);
-static int filt_fiforead(struct knote *kn, long hint);
-static void filt_fifowdetach(struct knote *kn);
-static int filt_fifowrite(struct knote *kn, long hint);
-static void filt_fifodetach_notsup(struct knote *kn);
-static int filt_fifo_notsup(struct knote *kn, long hint);
-
-static struct filterops fiforead_filtops =
- { 1, NULL, filt_fifordetach, filt_fiforead };
-static struct filterops fifowrite_filtops =
- { 1, NULL, filt_fifowdetach, filt_fifowrite };
-static struct filterops fifo_notsup_filtops =
- { 1, NULL, filt_fifodetach_notsup, filt_fifo_notsup };
-
struct vop_vector fifo_specops = {
.vop_default = &default_vnodeops,
-
.vop_access = VOP_EBADF,
.vop_advlock = fifo_advlock,
.vop_close = fifo_close,
@@ -137,27 +114,7 @@
.vop_write = VOP_PANIC,
};
-struct mtx fifo_mtx;
-MTX_SYSINIT(fifo, &fifo_mtx, "fifo mutex", MTX_DEF);
-
/*
- * Dispose of fifo resources.
- */
-static void
-fifo_cleanup(struct vnode *vp)
-{
- struct fifoinfo *fip = vp->v_fifoinfo;
-
- ASSERT_VOP_ELOCKED(vp, "fifo_cleanup");
- if (fip->fi_readers == 0 && fip->fi_writers == 0) {
- vp->v_fifoinfo = NULL;
- (void)soclose(fip->fi_readsock);
- (void)soclose(fip->fi_writesock);
- free(fip, M_VNODE);
- }
-}
-
-/*
* Open called to set up a new instance of a fifo or
* to find an active instance of a fifo.
*/
@@ -173,11 +130,10 @@
} */ *ap;
{
struct vnode *vp = ap->a_vp;
+ struct file *fp = ap->a_fp;
+ struct thread *td = ap->a_td;
struct fifoinfo *fip;
- struct thread *td = ap->a_td;
- struct ucred *cred = ap->a_cred;
- struct file *fp = ap->a_fp;
- struct socket *rso, *wso;
+ struct pipe *rpipe, *wpipe;
int error;
ASSERT_VOP_ELOCKED(vp, "fifo_open");
@@ -185,115 +141,29 @@
return (EINVAL);
if ((fip = vp->v_fifoinfo) == NULL) {
fip = malloc(sizeof(*fip), M_VNODE, M_WAITOK);
- error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0, cred, td);
- if (error)
- goto fail1;
- fip->fi_readsock = rso;
- error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0, cred, td);
- if (error)
- goto fail2;
- fip->fi_writesock = wso;
- error = soconnect2(wso, rso);
- if (error) {
- (void)soclose(wso);
-fail2:
- (void)soclose(rso);
-fail1:
+ if (( error = generic_pipe_create(td, &rpipe, &wpipe)) != 0) {
free(fip, M_VNODE);
return (error);
}
+ fip->fi_rpipe = rpipe;
+ fip->fi_wpipe = wpipe;
fip->fi_readers = fip->fi_writers = 0;
- wso->so_snd.sb_lowat = PIPE_BUF;
- SOCKBUF_LOCK(&rso->so_rcv);
- rso->so_rcv.sb_state |= SBS_CANTRCVMORE;
- SOCKBUF_UNLOCK(&rso->so_rcv);
- KASSERT(vp->v_fifoinfo == NULL,
- ("fifo_open: v_fifoinfo race"));
+ KASSERT(vp->v_fifoinfo == NULL, ("fifo_open: v_fifoinfo race"));
vp->v_fifoinfo = fip;
}
/*
* General access to fi_readers and fi_writers is protected using
* the vnode lock.
- *
- * Protect the increment of fi_readers and fi_writers and the
- * associated calls to wakeup() with the fifo mutex in addition
- * to the vnode lock. This allows the vnode lock to be dropped
- * for the msleep() calls below, and using the fifo mutex with
- * msleep() prevents the wakeup from being missed.
*/
- mtx_lock(&fifo_mtx);
- if (ap->a_mode & FREAD) {
+ if (ap->a_mode & FREAD)
fip->fi_readers++;
- if (fip->fi_readers == 1) {
- SOCKBUF_LOCK(&fip->fi_writesock->so_snd);
- fip->fi_writesock->so_snd.sb_state &= ~SBS_CANTSENDMORE;
- SOCKBUF_UNLOCK(&fip->fi_writesock->so_snd);
- if (fip->fi_writers > 0) {
- wakeup(&fip->fi_writers);
- sowwakeup(fip->fi_writesock);
- }
- }
- }
if (ap->a_mode & FWRITE) {
- if ((ap->a_mode & O_NONBLOCK) && fip->fi_readers == 0) {
- mtx_unlock(&fifo_mtx);
+ if ((ap->a_mode & O_NONBLOCK) && fip->fi_readers == 0)
return (ENXIO);
- }
- fip->fi_writers++;
- if (fip->fi_writers == 1) {
- SOCKBUF_LOCK(&fip->fi_readsock->so_rcv);
- fip->fi_readsock->so_rcv.sb_state &= ~SBS_CANTRCVMORE;
- SOCKBUF_UNLOCK(&fip->fi_readsock->so_rcv);
- if (fip->fi_readers > 0) {
- wakeup(&fip->fi_readers);
- sorwakeup(fip->fi_readsock);
- }
- }
+ fip->fi_writers++;
}
- if ((ap->a_mode & O_NONBLOCK) == 0) {
- if ((ap->a_mode & FREAD) && fip->fi_writers == 0) {
- VOP_UNLOCK(vp, 0);
- error = msleep(&fip->fi_readers, &fifo_mtx,
- PDROP | PCATCH | PSOCK, "fifoor", 0);
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
- if (error) {
- fip->fi_readers--;
- if (fip->fi_readers == 0) {
- socantsendmore(fip->fi_writesock);
- fifo_cleanup(vp);
- }
- return (error);
- }
- mtx_lock(&fifo_mtx);
- /*
- * We must have got woken up because we had a writer.
- * That (and not still having one) is the condition
- * that we must wait for.
- */
- }
- if ((ap->a_mode & FWRITE) && fip->fi_readers == 0) {
- VOP_UNLOCK(vp, 0);
- error = msleep(&fip->fi_writers, &fifo_mtx,
- PDROP | PCATCH | PSOCK, "fifoow", 0);
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
- if (error) {
- fip->fi_writers--;
- if (fip->fi_writers == 0) {
- socantrcvmore(fip->fi_readsock);
- fifo_cleanup(vp);
- }
- return (error);
- }
- /*
- * We must have got woken up because we had
- * a reader. That (and not still having one)
- * is the condition that we must wait for.
- */
- mtx_lock(&fifo_mtx);
- }
- }
- mtx_unlock(&fifo_mtx);
+
KASSERT(fp != NULL, ("can't fifo/vnode bypass"));
KASSERT(fp->f_ops == &badfileops, ("not badfileops in fifo_open"));
finit(fp, fp->f_flag, DTYPE_FIFO, fip, &fifo_ops_f);
@@ -301,6 +171,40 @@
}
/*
+ * Device close routine
+ */
+/* ARGSUSED */
+static int
+fifo_close(ap)
+ struct vop_close_args /* {
+ struct vnode *a_vp;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct thread *a_td;
+ } */ *ap;
+{
+ struct vnode *vp = ap->a_vp;
+ struct fifoinfo *fip = vp->v_fifoinfo;
+
+ ASSERT_VOP_ELOCKED(vp, "fifo_close");
+ if (ap->a_fflag & FREAD) {
+ fip->fi_readers--;
+ if (fip->fi_readers == 0)
+ generic_pipe_close(fip->fi_rpipe);
+ }
+ if (ap->a_fflag & FWRITE) {
+ fip->fi_writers--;
+ if (fip->fi_writers == 0)
+ generic_pipe_close(fip->fi_wpipe);
+ }
+ if (fip->fi_readers == 0 && fip->fi_writers == 0) {
+ vp->v_fifoinfo = NULL;
+ free(fip, M_VNODE);
+ }
+ return (0);
+}
+
+/*
* Now unused vnode ioctl routine.
*/
/* ARGSUSED */
@@ -336,125 +240,20 @@
return (EINVAL);
}
-static void
-filt_fifordetach(struct knote *kn)
-{
- struct socket *so = (struct socket *)kn->kn_hook;
-
- SOCKBUF_LOCK(&so->so_rcv);
- knlist_remove(&so->so_rcv.sb_sel.si_note, kn, 1);
- if (knlist_empty(&so->so_rcv.sb_sel.si_note))
- so->so_rcv.sb_flags &= ~SB_KNOTE;
- SOCKBUF_UNLOCK(&so->so_rcv);
-}
-
-static int
-filt_fiforead(struct knote *kn, long hint)
-{
- struct socket *so = (struct socket *)kn->kn_hook;
-
- SOCKBUF_LOCK_ASSERT(&so->so_rcv);
- kn->kn_data = so->so_rcv.sb_cc;
- if (so->so_rcv.sb_state & SBS_CANTRCVMORE) {
- kn->kn_flags |= EV_EOF;
- return (1);
- } else {
- kn->kn_flags &= ~EV_EOF;
- return (kn->kn_data > 0);
- }
-}
-
-static void
-filt_fifowdetach(struct knote *kn)
-{
- struct socket *so = (struct socket *)kn->kn_hook;
-
- SOCKBUF_LOCK(&so->so_snd);
- knlist_remove(&so->so_snd.sb_sel.si_note, kn, 1);
- if (knlist_empty(&so->so_snd.sb_sel.si_note))
- so->so_snd.sb_flags &= ~SB_KNOTE;
- SOCKBUF_UNLOCK(&so->so_snd);
-}
-
-static int
-filt_fifowrite(struct knote *kn, long hint)
-{
- struct socket *so = (struct socket *)kn->kn_hook;
-
- SOCKBUF_LOCK_ASSERT(&so->so_snd);
- kn->kn_data = sbspace(&so->so_snd);
- if (so->so_snd.sb_state & SBS_CANTSENDMORE) {
- kn->kn_flags |= EV_EOF;
- return (1);
- } else {
- kn->kn_flags &= ~EV_EOF;
- return (kn->kn_data >= so->so_snd.sb_lowat);
- }
-}
-
-static void
-filt_fifodetach_notsup(struct knote *kn)
-{
-
-}
-
-static int
-filt_fifo_notsup(struct knote *kn, long hint)
-{
-
- return (0);
-}
-
/*
- * Device close routine
+ * Print out internel contents of a fifo vnode
*/
-/* ARGSUSED */
-static int
-fifo_close(ap)
- struct vop_close_args /* {
- struct vnode *a_vp;
- int a_fflag;
- struct ucred *a_cred;
- struct thread *a_td;
- } */ *ap;
+int
+fifo_printinfo(struct vnode *vp)
{
- struct vnode *vp = ap->a_vp;
struct fifoinfo *fip = vp->v_fifoinfo;
- ASSERT_VOP_ELOCKED(vp, "fifo_close");
if (fip == NULL) {
- printf("fifo_close: no v_fifoinfo %p\n", vp);
- return (0);
- }
- if (ap->a_fflag & FREAD) {
- fip->fi_readers--;
- if (fip->fi_readers == 0)
- socantsendmore(fip->fi_writesock);
- }
- if (ap->a_fflag & FWRITE) {
- fip->fi_writers--;
- if (fip->fi_writers == 0)
- socantrcvmore(fip->fi_readsock);
- }
- fifo_cleanup(vp);
- return (0);
-}
-
-/*
- * Print out internal contents of a fifo vnode.
- */
-int
-fifo_printinfo(vp)
- struct vnode *vp;
-{
- register struct fifoinfo *fip = vp->v_fifoinfo;
-
- if (fip == NULL){
printf(", NULL v_fifoinfo");
return (0);
}
printf(", fifo with %ld readers and %ld writers",
- fip->fi_readers, fip->fi_writers);
+ fip->fi_readers, fip->fi_writers);
return (0);
}
@@ -467,7 +266,7 @@
struct vnode *a_vp;
} */ *ap;
{
- printf(" ");
+ printf(" ");
fifo_printinfo(ap->a_vp);
printf("\n");
return (0);
@@ -485,261 +284,90 @@
} */ *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 */
+ return (0);
}
/*
- * Fifo advisory byte-level locks.
+ * FIFO advisory byte-level locks.
*/
-/* ARGSUSED */
static int
fifo_advlock(ap)
struct vop_advlock_args /* {
struct vnode *a_vp;
- caddr_t a_id;
- int a_op;
+ caddr_t a_id;
+ int a_op;
struct flock *a_fl;
- int a_flags;
+ int a_flags;
} */ *ap;
{
-
return (ap->a_flags & F_FLOCK ? EOPNOTSUPP : EINVAL);
}
static int
-fifo_close_f(struct file *fp, struct thread *td)
+fifo_read_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)
{
+ int error;
+ struct fifoinfo *fip = fp->f_data;
- return (vnops.fo_close(fp, td));
+ fp->f_data = fip->fi_rpipe;
+ error = generic_pipe_read(fp, uio, cred, flags, td);
+ fp->f_data = fip;
+
+ return (error);
}
-/*
- * The implementation of ioctl() for named fifos is complicated by the fact
- * that we permit O_RDWR fifo file descriptors, meaning that the actions of
- * ioctls may have to be applied to both the underlying sockets rather than
- * just one. The original implementation simply forward the ioctl to one
- * or both sockets based on fp->f_flag. We now consider each ioctl
- * separately, as the composition effect requires careful ordering.
- *
- * We do not blindly pass all ioctls through to the socket in order to avoid
- * providing unnecessary ioctls that might be improperly depended on by
- * applications (such as socket-specific, routing, and interface ioctls).
- *
- * Unlike sys_pipe.c, fifos do not implement the deprecated TIOCSPGRP and
- * TIOCGPGRP ioctls. Earlier implementations of fifos did forward SIOCSPGRP
- * and SIOCGPGRP ioctls, so we might need to re-add those here.
- */
static int
-fifo_ioctl_f(struct file *fp, u_long com, void *data, struct ucred *cred,
- struct thread *td)
+fifo_write_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)
{
- struct fifoinfo *fi;
- struct file filetmp; /* Local, so need not be locked. */
int error;
+ struct fifoinfo *fip = fp->f_data;
- error = ENOTTY;
- fi = fp->f_data;
+ fp->f_data = fip->fi_wpipe;
+ error = generic_pipe_write(fp, uio, cred, flags, td);
+ fp->f_data = fip;
- switch (com) {
- case FIONBIO:
- /*
- * Non-blocking I/O is implemented at the fifo layer using
- * MSG_NBIO, so does not need to be forwarded down the stack.
- */
- return (0);
-
- case FIOASYNC:
- case FIOSETOWN:
- case FIOGETOWN:
- /*
- * These socket ioctls don't have any ordering requirements,
- * so are called in an arbitrary order, and only on the
- * sockets indicated by the file descriptor rights.
- *
- * XXXRW: If O_RDWR and the read socket accepts an ioctl but
- * the write socket doesn't, the socketpair is left in an
- * inconsistent state.
- */
- if (fp->f_flag & FREAD) {
- filetmp.f_data = fi->fi_readsock;
- filetmp.f_cred = cred;
- error = soo_ioctl(&filetmp, com, data, cred, td);
- if (error)
- return (error);
- }
- if (fp->f_flag & FWRITE) {
- filetmp.f_data = fi->fi_writesock;
- filetmp.f_cred = cred;
- error = soo_ioctl(&filetmp, com, data, cred, td);
- }
- return (error);
-
- case FIONREAD:
- /*
- * FIONREAD will return 0 for non-readable descriptors, and
- * the results of FIONREAD on the read socket for readable
- * descriptors.
- */
- if (!(fp->f_flag & FREAD)) {
- *(int *)data = 0;
- return (0);
- }
- filetmp.f_data = fi->fi_readsock;
- filetmp.f_cred = cred;
- return (soo_ioctl(&filetmp, com, data, cred, td));
-
- default:
- return (ENOTTY);
- }
+ return (error);
}
-/*
- * Because fifos are now a file descriptor layer object, EVFILT_VNODE is not
- * implemented. Likely, fifo_kqfilter() should be removed, and
- * fifo_kqfilter_f() should know how to forward the request to the underling
- * vnode using f_vnode in the file descriptor here.
- */
static int
-fifo_kqfilter_f(struct file *fp, struct knote *kn)
+fifo_stat_f(struct file *fp, struct stat *sb, struct ucred *cred, struct thread *td)
{
- struct fifoinfo *fi;
- struct socket *so;
- struct sockbuf *sb;
- fi = fp->f_data;
-
- /*
- * If a filter is requested that is not supported by this file
- * descriptor, don't return an error, but also don't ever generate an
- * event.
- */
- if ((kn->kn_filter == EVFILT_READ) && !(fp->f_flag & FREAD)) {
- kn->kn_fop = &fifo_notsup_filtops;
- return (0);
- }
-
- if ((kn->kn_filter == EVFILT_WRITE) && !(fp->f_flag & FWRITE)) {
- kn->kn_fop = &fifo_notsup_filtops;
- return (0);
- }
-
- switch (kn->kn_filter) {
- case EVFILT_READ:
- kn->kn_fop = &fiforead_filtops;
- so = fi->fi_readsock;
- sb = &so->so_rcv;
- break;
- case EVFILT_WRITE:
- kn->kn_fop = &fifowrite_filtops;
- so = fi->fi_writesock;
- sb = &so->so_snd;
- break;
- default:
- return (EINVAL);
- }
-
- kn->kn_hook = (caddr_t)so;
-
- SOCKBUF_LOCK(sb);
- knlist_add(&sb->sb_sel.si_note, kn, 1);
- sb->sb_flags |= SB_KNOTE;
- SOCKBUF_UNLOCK(sb);
-
- return (0);
+ return (vnops.fo_stat(fp, sb, cred, td));
}
static int
-fifo_poll_f(struct file *fp, int events, struct ucred *cred, struct thread *td)
+fifo_truncate_f(struct file *fp, off_t length, struct ucred *cred, struct thread *td)
{
- struct fifoinfo *fip;
- struct file filetmp;
- int levents, revents = 0;
-
- fip = fp->f_data;
- levents = events &
- (POLLIN | POLLINIGNEOF | POLLPRI | POLLRDNORM | POLLRDBAND);
- if ((fp->f_flag & FREAD) && levents) {
- /*
- * If POLLIN or POLLRDNORM is requested and POLLINIGNEOF is
- * not, then convert the first two to the last one. This
- * tells the socket poll function to ignore EOF so that we
- * block if there is no writer (and no data). Callers can
- * set POLLINIGNEOF to get non-blocking behavior.
- */
- if (levents & (POLLIN | POLLRDNORM) &&
- !(levents & POLLINIGNEOF)) {
- levents &= ~(POLLIN | POLLRDNORM);
- levents |= POLLINIGNEOF;
- }
-
- filetmp.f_data = fip->fi_readsock;
- filetmp.f_cred = cred;
- revents |= soo_poll(&filetmp, levents, cred, td);
-
- /* Reverse the above conversion. */
- if ((revents & POLLINIGNEOF) && !(events & POLLINIGNEOF)) {
- revents |= (events & (POLLIN | POLLRDNORM));
- revents &= ~POLLINIGNEOF;
- }
- }
- levents = events & (POLLOUT | POLLWRNORM | POLLWRBAND);
- if ((fp->f_flag & FWRITE) && levents) {
- filetmp.f_data = fip->fi_writesock;
- filetmp.f_cred = cred;
- revents |= soo_poll(&filetmp, levents, cred, td);
- }
- return (revents);
+
+ return (vnops.fo_truncate(fp, length, cred, td));
}
static int
-fifo_read_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)
+fifo_close_f(struct file *fp, struct thread *td)
{
- struct fifoinfo *fip;
- int sflags;
-
- fip = fp->f_data;
- KASSERT(uio->uio_rw == UIO_READ,("fifo_read mode"));
- if (uio->uio_resid == 0)
- return (0);
- sflags = (fp->f_flag & FNONBLOCK) ? MSG_NBIO : 0;
- return (soreceive(fip->fi_readsock, NULL, uio, NULL, NULL, &sflags));
+ return (vnops.fo_close(fp, td));
}
static int
-fifo_stat_f(struct file *fp, struct stat *sb, struct ucred *cred, struct thread *td)
+fifo_ioctl_f(struct file *fp, u_long com, void *data, struct ucred *cred,
+ struct thread *td)
{
- return (vnops.fo_stat(fp, sb, cred, td));
+ return (0);
}
static int
-fifo_truncate_f(struct file *fp, off_t length, struct ucred *cred, struct thread *td)
+fifo_kqfilter_f(struct file *fp, struct knote *kn)
{
- return (vnops.fo_truncate(fp, length, cred, td));
+ return (0);
}
-static int
-fifo_write_f(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct thread *td)
+static int
+fifo_poll_f(struct file *fp, int events, struct ucred *cred, struct thread *td)
{
- struct fifoinfo *fip;
- int sflags;
- fip = fp->f_data;
- KASSERT(uio->uio_rw == UIO_WRITE,("fifo_write mode"));
- sflags = (fp->f_flag & FNONBLOCK) ? MSG_NBIO : 0;
- return (sosend(fip->fi_writesock, NULL, uio, 0, NULL, sflags, td));
+ return (0);
}
+
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