80cc38a1af
between creation of a file descriptor and close(2) when using kernel assisted threads. What we do is stick descriptors in the table, but mark them as "larval". This causes essentially everything to treat it as a non-existent descriptor, except for fdalloc(), which sees a filled slot so that it won't (incorrectly) allocate it again. When a descriptor is fully constructed, the code that has constructed it marks it as "mature" (which actually clears the "larval" flag), and things continue to work as normal. While here, gather all the code that gets a descriptor from the table into a fd_getfile() function, and call it, rather than having the same (sometimes incorrect) code copied all over the place.
323 lines
8.4 KiB
C
323 lines
8.4 KiB
C
/* $NetBSD: osf1_descrip.c,v 1.12 2001/06/14 20:32:44 thorpej Exp $ */
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/*
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* Copyright (c) 1999 Christopher G. Demetriou. 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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. 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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/*
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* Copyright (c) 1994, 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/mount.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/reboot.h>
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#include <sys/syscallargs.h>
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#include <sys/exec.h>
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#include <sys/vnode.h>
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#include <sys/socketvar.h>
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#include <sys/resource.h>
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#include <sys/resourcevar.h>
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#include <sys/wait.h>
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#include <compat/osf1/osf1.h>
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#include <compat/osf1/osf1_syscallargs.h>
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#include <compat/osf1/osf1_cvt.h>
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int
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osf1_sys_fcntl(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct osf1_sys_fcntl_args *uap = v;
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struct sys_fcntl_args a;
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struct osf1_flock oflock;
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struct flock nflock;
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unsigned long xfl, leftovers;
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caddr_t sg;
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int error;
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sg = stackgap_init(p->p_emul);
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SCARG(&a, fd) = SCARG(uap, fd);
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leftovers = 0;
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switch (SCARG(uap, cmd)) {
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case OSF1_F_DUPFD:
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SCARG(&a, cmd) = F_DUPFD;
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SCARG(&a, arg) = SCARG(uap, arg);
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break;
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case OSF1_F_GETFD:
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SCARG(&a, cmd) = F_GETFD;
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SCARG(&a, arg) = 0; /* ignored */
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break;
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case OSF1_F_SETFD:
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SCARG(&a, cmd) = F_SETFD;
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SCARG(&a, arg) = (void *)emul_flags_translate(
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osf1_fcntl_getsetfd_flags_xtab,
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(unsigned long)SCARG(uap, arg), &leftovers);
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break;
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case OSF1_F_GETFL:
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SCARG(&a, cmd) = F_GETFL;
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SCARG(&a, arg) = 0; /* ignored */
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break;
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case OSF1_F_SETFL:
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SCARG(&a, cmd) = F_SETFL;
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xfl = emul_flags_translate(osf1_open_flags_xtab,
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(unsigned long)SCARG(uap, arg), &leftovers);
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xfl |= emul_flags_translate(osf1_fcntl_getsetfl_flags_xtab,
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leftovers, &leftovers);
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SCARG(&a, arg) = (void *)xfl;
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break;
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case OSF1_F_GETOWN: /* XXX not yet supported */
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case OSF1_F_SETOWN: /* XXX not yet supported */
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/* XXX translate. */
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return (EINVAL);
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case OSF1_F_GETLK:
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case OSF1_F_SETLK:
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case OSF1_F_SETLKW:
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if (SCARG(uap, cmd) == OSF1_F_GETLK)
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SCARG(&a, cmd) = F_GETLK;
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else if (SCARG(uap, cmd) == OSF1_F_SETLK)
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SCARG(&a, cmd) = F_SETLK;
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else if (SCARG(uap, cmd) == OSF1_F_SETLKW)
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SCARG(&a, cmd) = F_SETLKW;
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SCARG(&a, arg) = stackgap_alloc(&sg, sizeof nflock);
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error = copyin(SCARG(uap, arg), &oflock, sizeof oflock);
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if (error == 0)
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error = osf1_cvt_flock_to_native(&oflock, &nflock);
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if (error == 0)
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error = copyout(&nflock, SCARG(&a, arg),
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sizeof nflock);
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if (error != 0)
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return (error);
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break;
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case OSF1_F_RGETLK: /* [lock mgr op] XXX not supported */
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case OSF1_F_RSETLK: /* [lock mgr op] XXX not supported */
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case OSF1_F_CNVT: /* [lock mgr op] XXX not supported */
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case OSF1_F_RSETLKW: /* [lock mgr op] XXX not supported */
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case OSF1_F_PURGEFS: /* [lock mgr op] XXX not supported */
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case OSF1_F_PURGENFS: /* [DECsafe op] XXX not supported */
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default:
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/* XXX syslog? */
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return (EINVAL);
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}
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if (leftovers != 0)
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return (EINVAL);
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error = sys_fcntl(p, &a, retval);
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if (error)
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return error;
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switch (SCARG(uap, cmd)) {
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case OSF1_F_GETFD:
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retval[0] = emul_flags_translate(
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osf1_fcntl_getsetfd_flags_rxtab, retval[0], NULL);
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break;
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case OSF1_F_GETFL:
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xfl = emul_flags_translate(osf1_open_flags_rxtab,
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retval[0], &leftovers);
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xfl |= emul_flags_translate(osf1_fcntl_getsetfl_flags_rxtab,
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leftovers, NULL);
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retval[0] = xfl;
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break;
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case OSF1_F_GETLK:
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error = copyin(SCARG(&a, arg), &nflock, sizeof nflock);
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if (error == 0) {
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osf1_cvt_flock_from_native(&nflock, &oflock);
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error = copyout(&oflock, SCARG(uap, arg),
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sizeof oflock);
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}
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break;
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}
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return error;
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}
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int
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osf1_sys_fpathconf(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct osf1_sys_fpathconf_args *uap = v;
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struct sys_fpathconf_args a;
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int error;
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SCARG(&a, fd) = SCARG(uap, fd);
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error = osf1_cvt_pathconf_name_to_native(SCARG(uap, name),
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&SCARG(&a, name));
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if (error == 0)
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error = sys_fpathconf(p, &a, retval);
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return (error);
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}
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/*
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* Return status information about a file descriptor.
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*/
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int
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osf1_sys_fstat(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct osf1_sys_fstat_args *uap = v;
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struct filedesc *fdp = p->p_fd;
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struct file *fp;
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struct stat ub;
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struct osf1_stat oub;
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int error;
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if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
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return (EBADF);
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FILE_USE(fp);
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error = (*fp->f_ops->fo_stat)(fp, &ub, p);
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FILE_UNUSE(fp, p);
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osf1_cvt_stat_from_native(&ub, &oub);
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if (error == 0)
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error = copyout((caddr_t)&oub, (caddr_t)SCARG(uap, sb),
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sizeof (oub));
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return (error);
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}
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/*
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* Return status information about a file descriptor.
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*/
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int
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osf1_sys_fstat2(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct osf1_sys_fstat2_args *uap = v;
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struct filedesc *fdp = p->p_fd;
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struct file *fp;
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struct stat ub;
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struct osf1_stat2 oub;
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int error;
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if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
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return (EBADF);
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FILE_USE(fp);
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error = (*fp->f_ops->fo_stat)(fp, &ub, p);
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FILE_UNUSE(fp, p);
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osf1_cvt_stat2_from_native(&ub, &oub);
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if (error == 0)
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error = copyout((caddr_t)&oub, (caddr_t)SCARG(uap, sb),
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sizeof (oub));
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return (error);
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}
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int
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osf1_sys_ftruncate(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct osf1_sys_ftruncate_args *uap = v;
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struct sys_ftruncate_args a;
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SCARG(&a, fd) = SCARG(uap, fd);
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SCARG(&a, pad) = 0;
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SCARG(&a, length) = SCARG(uap, length);
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return sys_ftruncate(p, &a, retval);
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}
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int
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osf1_sys_lseek(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct osf1_sys_lseek_args *uap = v;
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struct sys_lseek_args a;
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SCARG(&a, fd) = SCARG(uap, fd);
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SCARG(&a, pad) = 0;
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SCARG(&a, offset) = SCARG(uap, offset);
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SCARG(&a, whence) = SCARG(uap, whence);
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return sys_lseek(p, &a, retval);
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}
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