13ccadd4b0
far-reaching in fd-land, so you'll want to consult the code for
changes. The biggest change is that now, you don't use
fp->f_ops->fo_foo(fp, bar)
but instead
fo_foo(fp, bar),
which increments and decrements the fp refcount upon entry and exit.
Two new calls, fhold() and fdrop(), are provided. Each does what it
seems like it should, and if fdrop() brings the refcount to zero, the
fd is freed as well.
Thanks to peter ("to hell with it, it looks ok to me.") for his review.
Thanks to msmith for keeping me from putting locks everywhere :)
Reviewed by: peter
326 lines
8.8 KiB
C
326 lines
8.8 KiB
C
/*
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* Copyright (c) 1995 Scott Bartram
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* 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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_spx_hack.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/ttycom.h>
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#include <sys/sysproto.h>
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#include <i386/ibcs2/ibcs2_fcntl.h>
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#include <i386/ibcs2/ibcs2_signal.h>
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#include <i386/ibcs2/ibcs2_proto.h>
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#include <i386/ibcs2/ibcs2_util.h>
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static void cvt_iflock2flock __P((struct ibcs2_flock *, struct flock *));
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static void cvt_flock2iflock __P((struct flock *, struct ibcs2_flock *));
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static int cvt_o_flags __P((int));
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static int oflags2ioflags __P((int));
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static int ioflags2oflags __P((int));
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static int
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cvt_o_flags(flags)
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int flags;
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{
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int r = 0;
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/* convert mode into NetBSD mode */
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if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
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if (flags & IBCS2_O_RDWR) r |= O_RDWR;
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if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
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if (flags & IBCS2_O_APPEND) r |= O_APPEND;
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if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
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if (flags & IBCS2_O_CREAT) r |= O_CREAT;
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if (flags & IBCS2_O_TRUNC) r |= O_TRUNC /* | O_CREAT ??? */;
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if (flags & IBCS2_O_EXCL) r |= O_EXCL;
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if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
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if (flags & IBCS2_O_PRIV) r |= O_EXLOCK;
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if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
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return r;
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}
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static void
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cvt_flock2iflock(flp, iflp)
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struct flock *flp;
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struct ibcs2_flock *iflp;
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{
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switch (flp->l_type) {
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case F_RDLCK:
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iflp->l_type = IBCS2_F_RDLCK;
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break;
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case F_WRLCK:
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iflp->l_type = IBCS2_F_WRLCK;
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break;
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case F_UNLCK:
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iflp->l_type = IBCS2_F_UNLCK;
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break;
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}
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iflp->l_whence = (short)flp->l_whence;
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iflp->l_start = (ibcs2_off_t)flp->l_start;
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iflp->l_len = (ibcs2_off_t)flp->l_len;
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iflp->l_sysid = 0;
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iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
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}
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#ifdef DEBUG_IBCS2
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static void
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print_flock(struct flock *flp)
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{
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printf("flock: start=%x len=%x pid=%d type=%d whence=%d\n",
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(int)flp->l_start, (int)flp->l_len, (int)flp->l_pid,
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flp->l_type, flp->l_whence);
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}
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#endif
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static void
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cvt_iflock2flock(iflp, flp)
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struct ibcs2_flock *iflp;
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struct flock *flp;
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{
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flp->l_start = (off_t)iflp->l_start;
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flp->l_len = (off_t)iflp->l_len;
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flp->l_pid = (pid_t)iflp->l_pid;
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switch (iflp->l_type) {
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case IBCS2_F_RDLCK:
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flp->l_type = F_RDLCK;
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break;
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case IBCS2_F_WRLCK:
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flp->l_type = F_WRLCK;
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break;
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case IBCS2_F_UNLCK:
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flp->l_type = F_UNLCK;
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break;
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}
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flp->l_whence = iflp->l_whence;
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}
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/* convert iBCS2 mode into NetBSD mode */
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static int
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ioflags2oflags(flags)
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int flags;
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{
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int r = 0;
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if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
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if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
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if (flags & IBCS2_O_RDWR) r |= O_RDWR;
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if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
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if (flags & IBCS2_O_APPEND) r |= O_APPEND;
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if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
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if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
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if (flags & IBCS2_O_CREAT) r |= O_CREAT;
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if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
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if (flags & IBCS2_O_EXCL) r |= O_EXCL;
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if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
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return r;
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}
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/* convert NetBSD mode into iBCS2 mode */
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static int
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oflags2ioflags(flags)
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int flags;
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{
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int r = 0;
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if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
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if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
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if (flags & O_RDWR) r |= IBCS2_O_RDWR;
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if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
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if (flags & O_APPEND) r |= IBCS2_O_APPEND;
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if (flags & O_FSYNC) r |= IBCS2_O_SYNC;
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if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
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if (flags & O_CREAT) r |= IBCS2_O_CREAT;
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if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
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if (flags & O_EXCL) r |= IBCS2_O_EXCL;
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if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
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return r;
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}
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int
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ibcs2_open(p, uap)
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struct proc *p;
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struct ibcs2_open_args *uap;
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{
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int noctty = SCARG(uap, flags) & IBCS2_O_NOCTTY;
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int ret;
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caddr_t sg = stackgap_init();
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SCARG(uap, flags) = cvt_o_flags(SCARG(uap, flags));
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if (SCARG(uap, flags) & O_CREAT)
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CHECKALTCREAT(p, &sg, SCARG(uap, path));
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else
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CHECKALTEXIST(p, &sg, SCARG(uap, path));
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ret = open(p, (struct open_args *)uap);
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#ifdef SPX_HACK
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if (ret == ENXIO) {
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if (!strcmp(SCARG(uap, path), "/compat/ibcs2/dev/spx"))
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ret = spx_open(p, uap);
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} else
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#endif /* SPX_HACK */
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if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
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struct filedesc *fdp = p->p_fd;
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struct file *fp = fdp->fd_ofiles[p->p_retval[0]];
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/* ignore any error, just give it a try */
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if (fp->f_type == DTYPE_VNODE)
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fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, p);
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}
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return ret;
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}
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int
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ibcs2_creat(p, uap)
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struct proc *p;
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struct ibcs2_creat_args *uap;
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{
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struct open_args cup;
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caddr_t sg = stackgap_init();
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CHECKALTCREAT(p, &sg, SCARG(uap, path));
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SCARG(&cup, path) = SCARG(uap, path);
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SCARG(&cup, mode) = SCARG(uap, mode);
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SCARG(&cup, flags) = O_WRONLY | O_CREAT | O_TRUNC;
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return open(p, &cup);
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}
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int
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ibcs2_access(p, uap)
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struct proc *p;
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struct ibcs2_access_args *uap;
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{
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struct access_args cup;
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caddr_t sg = stackgap_init();
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CHECKALTEXIST(p, &sg, SCARG(uap, path));
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SCARG(&cup, path) = SCARG(uap, path);
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SCARG(&cup, flags) = SCARG(uap, flags);
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return access(p, &cup);
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}
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int
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ibcs2_fcntl(p, uap)
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struct proc *p;
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struct ibcs2_fcntl_args *uap;
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{
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int error;
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struct fcntl_args fa;
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struct flock *flp;
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struct ibcs2_flock ifl;
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switch(SCARG(uap, cmd)) {
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case IBCS2_F_DUPFD:
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_DUPFD;
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SCARG(&fa, arg) = (/* XXX */ int)SCARG(uap, arg);
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return fcntl(p, &fa);
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case IBCS2_F_GETFD:
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_GETFD;
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SCARG(&fa, arg) = (/* XXX */ int)SCARG(uap, arg);
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return fcntl(p, &fa);
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case IBCS2_F_SETFD:
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_SETFD;
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SCARG(&fa, arg) = (/* XXX */ int)SCARG(uap, arg);
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return fcntl(p, &fa);
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case IBCS2_F_GETFL:
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_GETFL;
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SCARG(&fa, arg) = (/* XXX */ int)SCARG(uap, arg);
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error = fcntl(p, &fa);
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if (error)
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return error;
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p->p_retval[0] = oflags2ioflags(p->p_retval[0]);
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return error;
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case IBCS2_F_SETFL:
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_SETFL;
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SCARG(&fa, arg) = (/* XXX */ int)
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ioflags2oflags((int)SCARG(uap, arg));
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return fcntl(p, &fa);
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case IBCS2_F_GETLK:
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{
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caddr_t sg = stackgap_init();
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flp = stackgap_alloc(&sg, sizeof(*flp));
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error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
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ibcs2_flock_len);
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if (error)
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return error;
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cvt_iflock2flock(&ifl, flp);
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_GETLK;
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SCARG(&fa, arg) = (/* XXX */ int)flp;
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error = fcntl(p, &fa);
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if (error)
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return error;
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cvt_flock2iflock(flp, &ifl);
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return copyout((caddr_t)&ifl, (caddr_t)SCARG(uap, arg),
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ibcs2_flock_len);
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}
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case IBCS2_F_SETLK:
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{
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caddr_t sg = stackgap_init();
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flp = stackgap_alloc(&sg, sizeof(*flp));
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error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
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ibcs2_flock_len);
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if (error)
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return error;
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cvt_iflock2flock(&ifl, flp);
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_SETLK;
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SCARG(&fa, arg) = (/* XXX */ int)flp;
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return fcntl(p, &fa);
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}
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case IBCS2_F_SETLKW:
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{
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caddr_t sg = stackgap_init();
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flp = stackgap_alloc(&sg, sizeof(*flp));
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error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
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ibcs2_flock_len);
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if (error)
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return error;
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cvt_iflock2flock(&ifl, flp);
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = F_SETLKW;
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SCARG(&fa, arg) = (/* XXX */ int)flp;
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return fcntl(p, &fa);
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}
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}
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return ENOSYS;
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}
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