/* $NetBSD: linux32_fcntl.c,v 1.11 2021/11/25 02:35:00 ryo Exp $ */

/* $NetBSD: linux32_fcntl.c,v 1.11 2021/11/25 02:35:00 ryo Exp $ */

/*-
* Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Emmanuel Dreyfus
* 4. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>

__KERNEL_RCSID(0, "$NetBSD: linux32_fcntl.c,v 1.11 2021/11/25 02:35:00 ryo Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/signal.h>
#include <sys/fcntl.h>
#include <sys/filedesc.h>

#include <machine/types.h>

#include <sys/syscallargs.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>

#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_fcntl.h>
#include <compat/linux/common/linux_machdep.h>
#include <compat/linux/common/linux_misc.h>
#include <compat/linux/common/linux_ipc.h>
#include <compat/linux/common/linux_sem.h>
#include <compat/linux/linux_syscallargs.h>

#include <compat/linux32/common/linux32_types.h>
#include <compat/linux32/common/linux32_fcntl.h>
#include <compat/linux32/common/linux32_signal.h>
#include <compat/linux32/common/linux32_machdep.h>
#include <compat/linux32/linux32_syscall.h>
#include <compat/linux32/linux32_syscallargs.h>

struct linux32_flock {
short l_type;
short l_whence;
int32_t l_start;
int32_t l_len;
linux_pid_t l_pid;
};

struct linux32_flock64 {
short l_type;
short l_whence;
netbsd32_int64 l_start;
netbsd32_int64 l_len;
linux_pid_t l_pid;
};

conv_linux_flock(linux32, flock)
conv_linux_flock(linux32, flock64)

int
linux32_sys_open(struct lwp *l, const struct linux32_sys_open_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_charp) path;
syscallarg(int) flags;
syscallarg(int) mode;
} */
struct linux_sys_open_args ua;

NETBSD32TOP_UAP(path, const char);
NETBSD32TO64_UAP(flags);
NETBSD32TO64_UAP(mode);

return linux_sys_open(l, &ua, retval);
}

/*
* The linux support for 64bit file offsets introduced both an fcntl64()
* function and LINUX_F_SETLK64 (et al), however the fcntl64() function
* can still be passed LINUX_F_GETLK (etc).
* In practice this means that the two functions are identical!
*
* We have to intercept both sets of locking primitives because the
* structure layout of the 64bit version differs from that on amd64 due
* to extra padding because the alignment constraint for int64_t differs.
*/

int
linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(int) cmd;
syscallarg(netbsd32_voidp) arg;
} */
struct linux_sys_fcntl_args ua;
int cmd = SCARG(uap, cmd);

switch (cmd) {
case LINUX32_F_GETLK64:
do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
linux32, flock64);
case LINUX32_F_SETLK64:
case LINUX32_F_SETLKW64:
do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
linux32, flock64, LINUX_F_SETLK64);
case LINUX32_F_GETLK:
do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
linux32, flock);
case LINUX32_F_SETLK:
case LINUX32_F_SETLKW:
do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
linux32, flock, LINUX_F_SETLK);
default:
break;
}

NETBSD32TO64_UAP(fd);
SCARG(&ua, cmd) = cmd;
NETBSD32TOP_UAP(arg, void);

return linux_sys_fcntl(l, &ua, retval);
}

#ifdef LINUX32_SYS_fadvise64
int
linux32_sys_fadvise64(struct lwp *l,
const struct linux32_sys_fadvise64_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(uint32_t) offlo;
syscallarg(uint32_t) offhi;
syscallarg(netbsd32_size_t) len;
syscallarg(int) advice;
} */
off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo);

return do_posix_fadvise(SCARG(uap, fd), off,
SCARG(uap, len), linux_to_bsd_posix_fadv(SCARG(uap, advice)));
}
#endif

int
linux32_sys_fadvise64_64(struct lwp *l,
const struct linux32_sys_fadvise64_64_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(uint32_t) offlo;
syscallarg(uint32_t) offhi;
syscallarg(uint32_t) lenlo;
syscallarg(uint32_t) lenhi;
syscallarg(int) advice;
} */
off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo);
off_t len = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo);

return do_posix_fadvise(SCARG(uap, fd), off,
len, linux_to_bsd_posix_fadv(SCARG(uap, advice)));
}