5f419982c2
osf1_signal.c:1.41, amd64/amd64/trap.c:1.291, linux_socket.c:1.60, svr4_fcntl.c:1.36, svr4_ioctl.c:1.23, svr4_ipc.c:1.18, svr4_misc.c:1.81, svr4_signal.c:1.34, svr4_stat.c:1.21, svr4_stream.c:1.55, svr4_termios.c:1.13, svr4_ttold.c:1.15, svr4_util.h:1.10, ext2_alloc.c:1.43, i386/i386/trap.c:1.279, vm86.c:1.58, unaligned.c:1.12, imgact_elf.c:1.164, ffs_alloc.c:1.133: Now that Giant is acquired in uprintf() and tprintf(), the caller no longer leads to acquire Giant unless it also holds another mutex that would generate a lock order reversal when calling into these functions. Specifically not backed out is the acquisition of Giant in nfs_socket.c and rpcclnt.c, where local mutexes are held and would otherwise violate the lock order with Giant. This aligns this code more with the eventual locking of ttys. Suggested by: bde
171 lines
4.4 KiB
C
171 lines
4.4 KiB
C
/*-
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* Copyright (c) 1998 Mark Newton
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* Copyright (c) 1994 Christos Zoulas
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/fcntl.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/systm.h>
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#include <compat/svr4/svr4.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_proto.h>
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#include <compat/svr4/svr4_stropts.h>
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#include <compat/svr4/svr4_ioctl.h>
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#include <compat/svr4/svr4_termios.h>
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#include <compat/svr4/svr4_ttold.h>
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#include <compat/svr4/svr4_filio.h>
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#include <compat/svr4/svr4_sockio.h>
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#ifdef DEBUG_SVR4
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static void svr4_decode_cmd(u_long, char *, char *, int *, int *);
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/*
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* Decode an ioctl command symbolically
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*/
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static void
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svr4_decode_cmd(cmd, dir, c, num, argsiz)
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u_long cmd;
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char *dir, *c;
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int *num, *argsiz;
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{
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if (cmd & SVR4_IOC_VOID)
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*dir++ = 'V';
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if (cmd & SVR4_IOC_IN)
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*dir++ = 'R';
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if (cmd & SVR4_IOC_OUT)
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*dir++ = 'W';
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*dir = '\0';
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if (cmd & SVR4_IOC_INOUT)
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*argsiz = (cmd >> 16) & 0xff;
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else
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*argsiz = -1;
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*c = (cmd >> 8) & 0xff;
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*num = cmd & 0xff;
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}
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#endif
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int
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svr4_sys_ioctl(td, uap)
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register struct thread *td;
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struct svr4_sys_ioctl_args *uap;
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{
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int *retval;
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struct file *fp;
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u_long cmd;
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int (*fun)(struct file *, struct thread *, register_t *,
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int, u_long, caddr_t);
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int error;
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#ifdef DEBUG_SVR4
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char dir[4];
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char c;
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int num;
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int argsiz;
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svr4_decode_cmd(uap->com, dir, &c, &num, &argsiz);
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DPRINTF(("svr4_ioctl[%lx](%d, _IO%s(%c, %d, %d), %p);\n", uap->com, uap->fd,
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dir, c, num, argsiz, uap->data));
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#endif
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retval = td->td_retval;
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cmd = uap->com;
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if ((error = fget(td, uap->fd, &fp)) != 0)
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return (error);
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if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
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fdrop(fp, td);
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return EBADF;
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}
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#if defined(DEBUG_SVR4)
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if (fp->f_type == DTYPE_SOCKET) {
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struct socket *so = fp->f_data;
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DPRINTF(("<<< IN: so_state = 0x%x\n", so->so_state));
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}
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#endif
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switch (cmd & 0xff00) {
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#ifndef BURN_BRIDGES
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case SVR4_tIOC:
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DPRINTF(("ttold\n"));
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fun = svr4_ttold_ioctl;
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break;
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#endif
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case SVR4_TIOC:
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DPRINTF(("term\n"));
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fun = svr4_term_ioctl;
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break;
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case SVR4_STR:
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DPRINTF(("stream\n"));
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fun = svr4_stream_ioctl;
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break;
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case SVR4_FIOC:
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DPRINTF(("file\n"));
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fun = svr4_fil_ioctl;
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break;
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case SVR4_SIOC:
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DPRINTF(("socket\n"));
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fun = svr4_sock_ioctl;
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break;
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case SVR4_XIOC:
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/* We do not support those */
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fdrop(fp, td);
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return EINVAL;
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default:
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fdrop(fp, td);
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DPRINTF(("Unimplemented ioctl %lx\n", cmd));
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return 0; /* XXX: really ENOSYS */
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}
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#if defined(DEBUG_SVR4)
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if (fp->f_type == DTYPE_SOCKET) {
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struct socket *so;
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so = fp->f_data;
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DPRINTF((">>> OUT: so_state = 0x%x\n", so->so_state));
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}
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#endif
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error = (*fun)(fp, td, retval, uap->fd, cmd, uap->data);
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fdrop(fp, td);
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return (error);
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}
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