/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/namei.h>
-#include <sys/vnode.h>
+#include <sys/vnode_internal.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/stat.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
-#include <sys/file.h>
+#include <sys/file_internal.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <miscfs/fifofs/fifo.h>
#include <vfs/vfs_support.h>
-/*
- * This structure is associated with the FIFO vnode and stores
- * the state associated with the FIFO.
- */
-struct fifoinfo {
- struct socket *fi_readsock;
- struct socket *fi_writesock;
- long fi_readers;
- long fi_writers;
-};
-
#define VOPFUNC int (*)(void *)
int (**fifo_vnodeop_p)(void *);
struct vnodeopv_entry_desc fifo_vnodeop_entries[] = {
- { &vop_default_desc, (VOPFUNC)vn_default_error },
- { &vop_lookup_desc, (VOPFUNC)fifo_lookup }, /* lookup */
- { &vop_create_desc, (VOPFUNC)err_create }, /* create */
- { &vop_mknod_desc, (VOPFUNC)err_mknod }, /* mknod */
- { &vop_open_desc, (VOPFUNC)fifo_open }, /* open */
- { &vop_close_desc, (VOPFUNC)fifo_close }, /* close */
- { &vop_access_desc, (VOPFUNC)fifo_access }, /* access */
- { &vop_getattr_desc, (VOPFUNC)fifo_getattr }, /* getattr */
- { &vop_setattr_desc, (VOPFUNC)fifo_setattr }, /* setattr */
- { &vop_read_desc, (VOPFUNC)fifo_read }, /* read */
- { &vop_write_desc, (VOPFUNC)fifo_write }, /* write */
- { &vop_lease_desc, (VOPFUNC)fifo_lease_check }, /* lease */
- { &vop_ioctl_desc, (VOPFUNC)fifo_ioctl }, /* ioctl */
- { &vop_select_desc, (VOPFUNC)fifo_select }, /* select */
- { &vop_revoke_desc, (VOPFUNC)fifo_revoke }, /* revoke */
- { &vop_mmap_desc, (VOPFUNC)err_mmap }, /* mmap */
- { &vop_fsync_desc, (VOPFUNC)fifo_fsync }, /* fsync */
- { &vop_seek_desc, (VOPFUNC)err_seek }, /* seek */
- { &vop_remove_desc, (VOPFUNC)err_remove }, /* remove */
- { &vop_link_desc, (VOPFUNC)err_link }, /* link */
- { &vop_rename_desc, (VOPFUNC)err_rename }, /* rename */
- { &vop_mkdir_desc, (VOPFUNC)err_mkdir }, /* mkdir */
- { &vop_rmdir_desc, (VOPFUNC)err_rmdir }, /* rmdir */
- { &vop_symlink_desc, (VOPFUNC)err_symlink }, /* symlink */
- { &vop_readdir_desc, (VOPFUNC)err_readdir }, /* readdir */
- { &vop_readlink_desc, (VOPFUNC)err_readlink }, /* readlink */
- { &vop_abortop_desc, (VOPFUNC)err_abortop }, /* abortop */
- { &vop_inactive_desc, (VOPFUNC)fifo_inactive }, /* inactive */
- { &vop_reclaim_desc, (VOPFUNC)fifo_reclaim }, /* reclaim */
- { &vop_lock_desc, (VOPFUNC)fifo_lock }, /* lock */
- { &vop_unlock_desc, (VOPFUNC)fifo_unlock }, /* unlock */
- { &vop_bmap_desc, (VOPFUNC)fifo_bmap }, /* bmap */
- { &vop_strategy_desc, (VOPFUNC)err_strategy }, /* strategy */
- { &vop_print_desc, (VOPFUNC)fifo_print }, /* print */
- { &vop_islocked_desc, (VOPFUNC)fifo_islocked }, /* islocked */
- { &vop_pathconf_desc, (VOPFUNC)fifo_pathconf }, /* pathconf */
- { &vop_advlock_desc, (VOPFUNC)fifo_advlock }, /* advlock */
- { &vop_blkatoff_desc, (VOPFUNC)err_blkatoff }, /* blkatoff */
- { &vop_valloc_desc, (VOPFUNC)err_valloc }, /* valloc */
- { &vop_vfree_desc, (VOPFUNC)err_vfree }, /* vfree */
- { &vop_truncate_desc, (VOPFUNC)fifo_truncate }, /* truncate */
- { &vop_update_desc, (VOPFUNC)fifo_update }, /* update */
- { &vop_bwrite_desc, (VOPFUNC)fifo_bwrite }, /* bwrite */
- { &vop_pagein_desc, (VOPFUNC)err_pagein }, /* Pagein */
- { &vop_pageout_desc, (VOPFUNC)err_pageout }, /* Pageout */
- { &vop_copyfile_desc, (VOPFUNC)err_copyfile }, /* Copyfile */
- { &vop_blktooff_desc, (VOPFUNC)err_blktooff }, /* blktooff */
- { &vop_offtoblk_desc, (VOPFUNC)err_offtoblk }, /* offtoblk */
- { &vop_cmap_desc, (VOPFUNC)err_cmap }, /* cmap */
+ { &vnop_default_desc, (VOPFUNC)vn_default_error },
+ { &vnop_lookup_desc, (VOPFUNC)fifo_lookup }, /* lookup */
+ { &vnop_create_desc, (VOPFUNC)err_create }, /* create */
+ { &vnop_mknod_desc, (VOPFUNC)err_mknod }, /* mknod */
+ { &vnop_open_desc, (VOPFUNC)fifo_open }, /* open */
+ { &vnop_close_desc, (VOPFUNC)fifo_close }, /* close */
+ { &vnop_access_desc, (VOPFUNC)fifo_access }, /* access */
+ { &vnop_getattr_desc, (VOPFUNC)fifo_getattr }, /* getattr */
+ { &vnop_setattr_desc, (VOPFUNC)fifo_setattr }, /* setattr */
+ { &vnop_read_desc, (VOPFUNC)fifo_read }, /* read */
+ { &vnop_write_desc, (VOPFUNC)fifo_write }, /* write */
+ { &vnop_ioctl_desc, (VOPFUNC)fifo_ioctl }, /* ioctl */
+ { &vnop_select_desc, (VOPFUNC)fifo_select }, /* select */
+ { &vnop_revoke_desc, (VOPFUNC)fifo_revoke }, /* revoke */
+ { &vnop_mmap_desc, (VOPFUNC)err_mmap }, /* mmap */
+ { &vnop_fsync_desc, (VOPFUNC)fifo_fsync }, /* fsync */
+ { &vnop_remove_desc, (VOPFUNC)err_remove }, /* remove */
+ { &vnop_link_desc, (VOPFUNC)err_link }, /* link */
+ { &vnop_rename_desc, (VOPFUNC)err_rename }, /* rename */
+ { &vnop_mkdir_desc, (VOPFUNC)err_mkdir }, /* mkdir */
+ { &vnop_rmdir_desc, (VOPFUNC)err_rmdir }, /* rmdir */
+ { &vnop_symlink_desc, (VOPFUNC)err_symlink }, /* symlink */
+ { &vnop_readdir_desc, (VOPFUNC)err_readdir }, /* readdir */
+ { &vnop_readlink_desc, (VOPFUNC)err_readlink }, /* readlink */
+ { &vnop_inactive_desc, (VOPFUNC)fifo_inactive }, /* inactive */
+ { &vnop_reclaim_desc, (VOPFUNC)fifo_reclaim }, /* reclaim */
+ { &vnop_strategy_desc, (VOPFUNC)err_strategy }, /* strategy */
+ { &vnop_pathconf_desc, (VOPFUNC)fifo_pathconf }, /* pathconf */
+ { &vnop_advlock_desc, (VOPFUNC)fifo_advlock }, /* advlock */
+ { &vnop_bwrite_desc, (VOPFUNC)fifo_bwrite }, /* bwrite */
+ { &vnop_pagein_desc, (VOPFUNC)err_pagein }, /* Pagein */
+ { &vnop_pageout_desc, (VOPFUNC)err_pageout }, /* Pageout */
+ { &vnop_copyfile_desc, (VOPFUNC)err_copyfile }, /* Copyfile */
+ { &vnop_blktooff_desc, (VOPFUNC)err_blktooff }, /* blktooff */
+ { &vnop_offtoblk_desc, (VOPFUNC)err_offtoblk }, /* offtoblk */
+ { &vnop_blockmap_desc, (VOPFUNC)err_blockmap }, /* blockmap */
{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc fifo_vnodeop_opv_desc =
* Trivial lookup routine that always fails.
*/
/* ARGSUSED */
-fifo_lookup(ap)
- struct vop_lookup_args /* {
- struct vnode * a_dvp;
- struct vnode ** a_vpp;
- struct componentname * a_cnp;
- } */ *ap;
+int
+fifo_lookup(struct vnop_lookup_args *ap)
{
*ap->a_vpp = NULL;
* to find an active instance of a fifo.
*/
/* ARGSUSED */
-fifo_open(ap)
- struct vop_open_args /* {
- struct vnode *a_vp;
- int a_mode;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
+int
+fifo_open(struct vnop_open_args *ap)
{
struct vnode *vp = ap->a_vp;
struct fifoinfo *fip;
- struct proc *p = ap->a_p;
struct socket *rso, *wso;
int error;
- if ((fip = vp->v_fifoinfo) == NULL) {
- MALLOC_ZONE(fip, struct fifoinfo *,
- sizeof(*fip), M_VNODE, M_WAITOK);
- vp->v_fifoinfo = fip;
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
- if (error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0)) {
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- _FREE_ZONE(fip, sizeof *fip, M_VNODE);
- vp->v_fifoinfo = NULL;
- return (error);
- }
- fip->fi_readsock = rso;
- if (error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0)) {
- (void)soclose(rso);
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- _FREE_ZONE(fip, sizeof *fip, M_VNODE);
- vp->v_fifoinfo = NULL;
- return (error);
- }
- fip->fi_writesock = wso;
- if (error = unp_connect2(wso, rso)) {
- (void)soclose(wso);
- (void)soclose(rso);
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- _FREE_ZONE(fip, sizeof *fip, M_VNODE);
- vp->v_fifoinfo = NULL;
- return (error);
+ vnode_lock(vp);
+
+retry:
+
+ fip = vp->v_fifoinfo;
+
+ if (fip == (struct fifoinfo *)0)
+ panic("fifo_open with no fifoinfo");
+
+ if ((fip->fi_flags & FIFO_CREATED) == 0) {
+ if (fip->fi_flags & FIFO_INCREATE) {
+ fip->fi_flags |= FIFO_CREATEWAIT;
+ error = msleep(&fip->fi_flags, &vp->v_lock, PRIBIO | PCATCH, "fifocreatewait", NULL);
+ if (error) {
+ vnode_unlock(vp);
+ return(error);
+ }
+ goto retry;
+ } else {
+ fip->fi_flags |= FIFO_INCREATE;
+ vnode_unlock(vp);
+ if ( (error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0)) ) {
+ goto bad1;
+ }
+
+ if ( (error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0)) ) {
+ (void)soclose(rso);
+ goto bad1;
+ }
+
+ if ( (error = soconnect2(wso, rso)) ) {
+ (void)soclose(wso);
+ (void)soclose(rso);
+ goto bad1;
+ }
+ fip->fi_readers = fip->fi_writers = 0;
+
+ /* Lock ordering between wso and rso does not matter here
+ * because they are just created and no one has a reference to them
+ */
+ socket_lock(wso, 1);
+ wso->so_state |= SS_CANTRCVMORE;
+ wso->so_snd.sb_lowat = PIPE_BUF;
+ socket_unlock(wso, 1);
+
+ socket_lock(rso, 1);
+ rso->so_state |= SS_CANTSENDMORE;
+ socket_unlock(rso, 1);
+
+ vnode_lock(vp);
+ fip->fi_readsock = rso;
+ fip->fi_writesock = wso;
+
+ fip->fi_flags |= FIFO_CREATED;
+ fip->fi_flags &= ~FIFO_INCREATE;
+
+ if ((fip->fi_flags & FIFO_CREATEWAIT)) {
+ fip->fi_flags &= ~FIFO_CREATEWAIT;
+ wakeup(&fip->fi_flags);
+ }
+ /* vnode lock is held to process further */
}
- wso->so_state |= SS_CANTRCVMORE;
- wso->so_snd.sb_lowat = PIPE_BUF;
- rso->so_state |= SS_CANTSENDMORE;
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- fip->fi_readers = fip->fi_writers = 0;
}
+
+ /* vnode is locked at this point */
+ /* fifo in created already */
if (ap->a_mode & FREAD) {
fip->fi_readers++;
if (fip->fi_readers == 1) {
+ socket_lock(fip->fi_writesock, 1);
fip->fi_writesock->so_state &= ~SS_CANTSENDMORE;
+ socket_unlock(fip->fi_writesock, 1);
+
if (fip->fi_writers > 0)
wakeup((caddr_t)&fip->fi_writers);
}
if (ap->a_mode & FWRITE) {
fip->fi_writers++;
if (fip->fi_writers == 1) {
+ socket_lock(fip->fi_readsock, 1);
fip->fi_readsock->so_state &= ~SS_CANTRCVMORE;
+ socket_unlock(fip->fi_readsock, 1);
+
if (fip->fi_readers > 0)
wakeup((caddr_t)&fip->fi_readers);
}
}
if ((ap->a_mode & FREAD) && (ap->a_mode & O_NONBLOCK) == 0) {
if (fip->fi_writers == 0) {
- VOP_UNLOCK(vp, 0, p);
- error = tsleep((caddr_t)&fip->fi_readers,
- PCATCH | PSOCK, "fifoor", 0);
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
+ error = msleep((caddr_t)&fip->fi_readers, &vp->v_lock,
+ PCATCH | PSOCK, "fifoor", NULL);
if (error)
goto bad;
if (fip->fi_readers == 1) {
if (ap->a_mode & FWRITE) {
if (ap->a_mode & O_NONBLOCK) {
if (fip->fi_readers == 0) {
- error = ENXIO;
- goto bad;
+ error = ENXIO;
+ goto bad;
}
} else {
if (fip->fi_readers == 0) {
- VOP_UNLOCK(vp, 0, p);
- error = tsleep((caddr_t)&fip->fi_writers,
- PCATCH | PSOCK, "fifoow", 0);
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
+ error = msleep((caddr_t)&fip->fi_writers,&vp->v_lock,
+ PCATCH | PSOCK, "fifoow", NULL);
if (error)
goto bad;
if (fip->fi_writers == 1) {
}
}
}
+
+ vnode_unlock(vp);
return (0);
bad:
- if (error)
- VOP_CLOSE(vp, ap->a_mode, ap->a_cred, p);
+ fifo_close_internal(vp, ap->a_mode, ap->a_context, 1);
+
+ vnode_unlock(vp);
+ return (error);
+bad1:
+ vnode_lock(vp);
+
+ fip->fi_flags &= ~FIFO_INCREATE;
+
+ if ((fip->fi_flags & FIFO_CREATEWAIT)) {
+ fip->fi_flags &= ~FIFO_CREATEWAIT;
+ wakeup(&fip->fi_flags);
+ }
+ vnode_unlock(vp);
+
return (error);
}
/*
* Vnode op for read
*/
-/* ARGSUSED */
-fifo_read(ap)
- struct vop_read_args /* {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- struct ucred *a_cred;
- } */ *ap;
+int
+fifo_read(struct vnop_read_args *ap)
{
struct uio *uio = ap->a_uio;
struct socket *rso = ap->a_vp->v_fifoinfo->fi_readsock;
- struct proc *p = uio->uio_procp;
- int error, startresid;
+ user_ssize_t startresid;
+ int error;
+ int rflags;
#if DIAGNOSTIC
if (uio->uio_rw != UIO_READ)
panic("fifo_read mode");
#endif
- if (uio->uio_resid == 0)
+ if (uio_resid(uio) == 0)
return (0);
- if (ap->a_ioflag & IO_NDELAY)
- rso->so_state |= SS_NBIO;
- startresid = uio->uio_resid;
- VOP_UNLOCK(ap->a_vp, 0, p);
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
- error = soreceive(rso, (struct sockaddr **)0, uio, (struct mbuf **)0,
- (struct mbuf **)0, (int *)0);
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, p);
+
+ rflags = (ap->a_ioflag & IO_NDELAY) ? MSG_NBIO : 0;
+
+ startresid = uio_resid(uio);
+
+ /* fifo conformance - if we have a reader open on the fifo but no
+ * writers then we need to make sure we do not block. We do that by
+ * checking the receive buffer and if empty set error to EWOULDBLOCK.
+ * If error is set to EWOULDBLOCK we skip the call into soreceive
+ */
+ error = 0;
+ if (ap->a_vp->v_fifoinfo->fi_writers < 1) {
+ socket_lock(rso, 1);
+ error = (rso->so_rcv.sb_cc == 0) ? EWOULDBLOCK : 0;
+ socket_unlock(rso, 1);
+ }
+
+ /* skip soreceive to avoid blocking when we have no writers */
+ if (error != EWOULDBLOCK) {
+ error = soreceive(rso, (struct sockaddr **)0, uio, (struct mbuf **)0,
+ (struct mbuf **)0, &rflags);
+ }
+ else {
+ /* clear EWOULDBLOCK and return EOF (zero) */
+ error = 0;
+ }
/*
* Clear EOF indication after first such return.
*/
- if (uio->uio_resid == startresid)
+ if (uio_resid(uio) == startresid) {
+ socket_lock(rso, 1);
rso->so_state &= ~SS_CANTRCVMORE;
- if (ap->a_ioflag & IO_NDELAY)
- rso->so_state &= ~SS_NBIO;
+ socket_unlock(rso, 1);
+ }
return (error);
}
/*
* Vnode op for write
*/
-/* ARGSUSED */
-fifo_write(ap)
- struct vop_write_args /* {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- struct ucred *a_cred;
- } */ *ap;
+int
+fifo_write(struct vnop_write_args *ap)
{
struct socket *wso = ap->a_vp->v_fifoinfo->fi_writesock;
- struct proc *p = ap->a_uio->uio_procp;
int error;
#if 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;
- VOP_UNLOCK(ap->a_vp, 0, p);
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
- error = sosend(wso, (struct sockaddr *)0, ap->a_uio, 0, (struct mbuf *)0, 0);
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, p);
- if (ap->a_ioflag & IO_NDELAY)
- wso->so_state &= ~SS_NBIO;
+ error = sosend(wso, (struct sockaddr *)0, ap->a_uio, NULL,
+ (struct mbuf *)0, (ap->a_ioflag & IO_NDELAY) ? MSG_NBIO : 0);
+
return (error);
}
/*
* Device ioctl operation.
*/
-/* ARGSUSED */
-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;
+int
+fifo_ioctl(struct vnop_ioctl_args *ap)
{
- struct file filetmp;
+ struct fileproc filetmp;
+ struct fileglob filefg;
int error;
if (ap->a_command == FIONBIO)
return (0);
+ bzero(&filetmp, sizeof(struct fileproc));
+ filetmp.f_fglob = &filefg;
if (ap->a_fflag & FREAD) {
- filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_readsock;
- error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_p);
+ filetmp.f_fglob->fg_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_readsock;
+ error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_context);
if (error)
return (error);
}
if (ap->a_fflag & FWRITE) {
- filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_writesock;
- error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_p);
+ filetmp.f_fglob->fg_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_writesock;
+ error = soo_ioctl(&filetmp, ap->a_command, ap->a_data, ap->a_context);
if (error)
return (error);
}
return (0);
}
-/* ARGSUSED */
-fifo_select(ap)
- struct vop_select_args /* {
- struct vnode *a_vp;
- int a_which;
- int a_fflags;
- struct ucred *a_cred;
- void * a_wql;
- struct proc *a_p;
- } */ *ap;
+int
+fifo_select(struct vnop_select_args *ap)
{
- struct file filetmp;
+ struct fileproc filetmp;
+ struct fileglob filefg;
int ready;
+ bzero(&filetmp, sizeof(struct fileproc));
+ filetmp.f_fglob = &filefg;
if (ap->a_which & FREAD) {
- filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_readsock;
- ready = soo_select(&filetmp, ap->a_which, ap->a_wql, ap->a_p);
+ filetmp.f_fglob->fg_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_readsock;
+ ready = soo_select(&filetmp, ap->a_which, ap->a_wql, ap->a_context);
if (ready)
return (ready);
}
if (ap->a_which & FWRITE) {
- filetmp.f_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_writesock;
- ready = soo_select(&filetmp, ap->a_which, ap->a_wql, ap->a_p);
+ filetmp.f_fglob->fg_data = (caddr_t)ap->a_vp->v_fifoinfo->fi_writesock;
+ ready = soo_select(&filetmp, ap->a_which, ap->a_wql, ap->a_context);
if (ready)
return (ready);
}
}
int
-fifo_inactive(ap)
- struct vop_inactive_args /* {
- struct vnode *a_vp;
- struct proc *a_p;
- } */ *ap;
+fifo_inactive(__unused struct vnop_inactive_args *ap)
{
-
- VOP_UNLOCK(ap->a_vp, 0, ap->a_p);
return (0);
}
+
/*
- * This is a noop, simply returning what one has been given.
+ * Device close routine
*/
-fifo_bmap(ap)
- struct vop_bmap_args /* {
- struct vnode *a_vp;
- daddr_t a_bn;
- struct vnode **a_vpp;
- daddr_t *a_bnp;
- int *a_runp;
- } */ *ap;
+int
+fifo_close(struct vnop_close_args *ap)
{
-
- if (ap->a_vpp != NULL)
- *ap->a_vpp = ap->a_vp;
- if (ap->a_bnp != NULL)
- *ap->a_bnp = ap->a_bn;
- if (ap->a_runp != NULL)
- *ap->a_runp = 0;
- return (0);
+ return fifo_close_internal(ap->a_vp, ap->a_fflag, ap->a_context, 0);
}
-/*
- * Device close routine
- */
-/* ARGSUSED */
-fifo_close(ap)
- struct vop_close_args /* {
- struct vnode *a_vp;
- int a_fflag;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
+int
+fifo_close_internal(vnode_t vp, int fflag, __unused vfs_context_t context, int locked)
{
- register struct vnode *vp = ap->a_vp;
- register struct fifoinfo *fip = vp->v_fifoinfo;
+ struct fifoinfo *fip = vp->v_fifoinfo;
int error1, error2;
+ struct socket *rso;
+ struct socket *wso;
- if (ap->a_fflag & FREAD) {
+ if (!locked)
+ vnode_lock(vp);
+
+ if ((fip->fi_flags & FIFO_CREATED) == 0) {
+ if (!locked)
+ vnode_unlock(vp);
+ return(0);
+
+ }
+
+ if (fflag & FREAD) {
fip->fi_readers--;
if (fip->fi_readers == 0){
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
+ socket_lock(fip->fi_writesock, 1);
socantsendmore(fip->fi_writesock);
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
+ socket_unlock(fip->fi_writesock, 1);
}
}
- if (ap->a_fflag & FWRITE) {
+
+ if (fflag & FWRITE) {
fip->fi_writers--;
if (fip->fi_writers == 0) {
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
+ socket_lock(fip->fi_readsock, 1);
socantrcvmore(fip->fi_readsock);
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
+ socket_unlock(fip->fi_readsock, 1);
}
}
- if (vp->v_usecount > 1)
+#if 0
+ if (vnode_isinuse_locked(vp, 0, 1)) {
+ if (!locked)
+ vnode_unlock(vp);
return (0);
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
- error1 = soclose(fip->fi_readsock);
- error2 = soclose(fip->fi_writesock);
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- FREE_ZONE(fip, sizeof *fip, M_VNODE);
- vp->v_fifoinfo = NULL;
+ }
+#endif
+
+ if (fip->fi_writers || fip->fi_readers) {
+ if (!locked)
+ vnode_unlock(vp);
+ return (0);
+ }
+
+ wso = fip->fi_writesock;
+ rso = fip->fi_readsock;
+ fip->fi_readsock = NULL;
+ fip->fi_writesock = NULL;
+ fip->fi_flags &= ~FIFO_CREATED;
+ if (!locked)
+ vnode_unlock(vp);
+ error1 = soclose(rso);
+ error2 = soclose(wso);
+
if (error1)
return (error1);
return (error2);
}
-/*
- * Print out the contents of a fifo vnode.
- */
-fifo_print(ap)
- struct vop_print_args /* {
- struct vnode *a_vp;
- } */ *ap;
-{
-
- printf("tag VT_NON");
- fifo_printinfo(ap->a_vp);
- printf("\n");
-}
-
/*
* Print out internal contents of a fifo vnode.
*/
-fifo_printinfo(vp)
- struct vnode *vp;
+void
+fifo_printinfo(struct vnode *vp)
{
- register struct fifoinfo *fip = vp->v_fifoinfo;
+ struct fifoinfo *fip = vp->v_fifoinfo;
- printf(", fifo with %d readers and %d writers",
+ printf(", fifo with %ld readers and %ld writers",
fip->fi_readers, fip->fi_writers);
}
/*
* Return POSIX pathconf information applicable to fifo's.
*/
-fifo_pathconf(ap)
- struct vop_pathconf_args /* {
- struct vnode *a_vp;
- int a_name;
- int *a_retval;
- } */ *ap;
+int
+fifo_pathconf(struct vnop_pathconf_args *ap)
{
-
switch (ap->a_name) {
case _PC_LINK_MAX:
*ap->a_retval = LINK_MAX;
*ap->a_retval = PIPE_BUF;
return (0);
case _PC_CHOWN_RESTRICTED:
- *ap->a_retval = 1;
+ *ap->a_retval = 200112; /* _POSIX_CHOWN_RESTRICTED */
return (0);
default:
return (EINVAL);
/*
* Fifo failed operation
*/
-fifo_ebadf()
+int
+fifo_ebadf(__unused void *dummy)
{
return (EBADF);
/*
* Fifo advisory byte-level locks.
*/
-/* ARGSUSED */
-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;
+int
+fifo_advlock(__unused struct vnop_advlock_args *ap)
{
- return (EOPNOTSUPP);
+ return (ENOTSUP);
+}
+
+
+/* You'd certainly better have an iocount on the vnode! */
+int
+fifo_freespace(struct vnode *vp, long *count)
+{
+ struct socket *rsock;
+ rsock = vp->v_fifoinfo->fi_readsock;
+ socket_lock(rsock, 1);
+ *count = sbspace(&rsock->so_rcv);
+ socket_unlock(rsock, 1);
+ return 0;
}
+int
+fifo_charcount(struct vnode *vp, int *count)
+{
+ int mcount;
+ int err = sock_ioctl(vp->v_fifoinfo->fi_readsock, FIONREAD, (void*)&mcount);
+ if (err == 0) {
+ *count = mcount;
+ }
+ return err;
+}
projects / apple / xnu.git / blobdiff