1 /* $NetBSD: linux32_fcntl.c,v 1.6 2008/02/04 22:23:43 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Emmanuel Dreyfus 17 * 4. The name of the author may not be used to endorse or promote 18 * products derived from this software without specific prior written 19 * permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __KERNEL_RCSID(0, "$NetBSD: linux32_fcntl.c,v 1.6 2008/02/04 22:23:43 dsl Exp $"); 37 38 #include <sys/types.h> 39 #include <sys/param.h> 40 #include <sys/signal.h> 41 #include <sys/fcntl.h> 42 #include <sys/filedesc.h> 43 44 #include <machine/types.h> 45 46 #include <sys/syscallargs.h> 47 48 #include <compat/netbsd32/netbsd32.h> 49 #include <compat/netbsd32/netbsd32_syscallargs.h> 50 51 #include <compat/linux/common/linux_types.h> 52 #include <compat/linux/common/linux_fcntl.h> 53 #include <compat/linux/common/linux_machdep.h> 54 #include <compat/linux/common/linux_misc.h> 55 #include <compat/linux/linux_syscallargs.h> 56 57 #include <compat/linux32/common/linux32_types.h> 58 #include <compat/linux32/common/linux32_signal.h> 59 #include <compat/linux32/common/linux32_machdep.h> 60 #include <compat/linux32/linux32_syscallargs.h> 61 62 struct linux32_flock { 63 short l_type; 64 short l_whence; 65 int32_t l_start; 66 int32_t l_len; 67 linux_pid_t l_pid; 68 }; 69 70 struct linux32_flock64 { 71 short l_type; 72 short l_whence; 73 netbsd32_int64 l_start; 74 netbsd32_int64 l_len; 75 linux_pid_t l_pid; 76 }; 77 78 conv_linux_flock(linux32, flock) 79 conv_linux_flock(linux32, flock64) 80 81 int 82 linux32_sys_open(struct lwp *l, const struct linux32_sys_open_args *uap, register_t *retval) 83 { 84 /* { 85 syscallarg(const netbsd32_charp) path; 86 syscallarg(int) flags; 87 syscallarg(int) mode; 88 } */ 89 struct linux_sys_open_args ua; 90 91 NETBSD32TOP_UAP(path, const char); 92 NETBSD32TO64_UAP(flags); 93 NETBSD32TO64_UAP(mode); 94 95 return linux_sys_open(l, &ua, retval); 96 } 97 98 /* 99 * The linux support for 64bit file offsets introduced both an fcntl64() 100 * function and LINUX_F_SETLK64 (et al), however the fcntl64() function 101 * can still be passed LINUX_F_GETLK (etc). 102 * In practice this means that the two functions are identical! 103 * 104 * We have to intercept both sets of locking primitives because the 105 * structure layout of the 64bit version differs from that on amd64 due 106 * to extra padding because the alignment constraint for int64_t differs. 107 */ 108 109 int 110 linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval) 111 { 112 /* { 113 syscallcarg(int) fd; 114 syscallarg(int) cmd; 115 syscallarg(netbsd32_voidp) arg; 116 } */ 117 struct linux_sys_fcntl_args ua; 118 int cmd = SCARG(uap, cmd); 119 120 switch (cmd) { 121 case LINUX_F_GETLK64: 122 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 123 linux32, flock64); 124 case LINUX_F_SETLK64: 125 case LINUX_F_SETLKW64: 126 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 127 linux32, flock64, LINUX_F_SETLK64); 128 case LINUX_F_GETLK: 129 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 130 linux32, flock); 131 case LINUX_F_SETLK: 132 case LINUX_F_SETLKW: 133 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 134 linux32, flock, LINUX_F_SETLK); 135 default: 136 break; 137 } 138 139 NETBSD32TO64_UAP(fd); 140 SCARG(&ua, cmd) = cmd; 141 NETBSD32TOP_UAP(arg, void); 142 143 return linux_sys_fcntl(l, &ua, retval); 144 } 145