linux32_fcntl.c revision 1.9
1 /* $NetBSD: linux32_fcntl.c,v 1.9 2011/05/30 17:50:32 alnsn 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 1.9 2011/05/30 17:50:32 alnsn 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/common/linux_ipc.h> 56 #include <compat/linux/common/linux_sem.h> 57 #include <compat/linux/linux_syscallargs.h> 58 59 #include <compat/linux32/common/linux32_types.h> 60 #include <compat/linux32/common/linux32_signal.h> 61 #include <compat/linux32/common/linux32_machdep.h> 62 #include <compat/linux32/linux32_syscallargs.h> 63 64 struct linux32_flock { 65 short l_type; 66 short l_whence; 67 int32_t l_start; 68 int32_t l_len; 69 linux_pid_t l_pid; 70 }; 71 72 struct linux32_flock64 { 73 short l_type; 74 short l_whence; 75 netbsd32_int64 l_start; 76 netbsd32_int64 l_len; 77 linux_pid_t l_pid; 78 }; 79 80 conv_linux_flock(linux32, flock) 81 conv_linux_flock(linux32, flock64) 82 83 int 84 linux32_sys_open(struct lwp *l, const struct linux32_sys_open_args *uap, register_t *retval) 85 { 86 /* { 87 syscallarg(const netbsd32_charp) path; 88 syscallarg(int) flags; 89 syscallarg(int) mode; 90 } */ 91 struct linux_sys_open_args ua; 92 93 NETBSD32TOP_UAP(path, const char); 94 NETBSD32TO64_UAP(flags); 95 NETBSD32TO64_UAP(mode); 96 97 return linux_sys_open(l, &ua, retval); 98 } 99 100 /* 101 * The linux support for 64bit file offsets introduced both an fcntl64() 102 * function and LINUX_F_SETLK64 (et al), however the fcntl64() function 103 * can still be passed LINUX_F_GETLK (etc). 104 * In practice this means that the two functions are identical! 105 * 106 * We have to intercept both sets of locking primitives because the 107 * structure layout of the 64bit version differs from that on amd64 due 108 * to extra padding because the alignment constraint for int64_t differs. 109 */ 110 111 int 112 linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval) 113 { 114 /* { 115 syscallarg(int) fd; 116 syscallarg(int) cmd; 117 syscallarg(netbsd32_voidp) arg; 118 } */ 119 struct linux_sys_fcntl_args ua; 120 int cmd = SCARG(uap, cmd); 121 122 switch (cmd) { 123 case LINUX_F_GETLK64: 124 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 125 linux32, flock64); 126 case LINUX_F_SETLK64: 127 case LINUX_F_SETLKW64: 128 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 129 linux32, flock64, LINUX_F_SETLK64); 130 case LINUX_F_GETLK: 131 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 132 linux32, flock); 133 case LINUX_F_SETLK: 134 case LINUX_F_SETLKW: 135 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg), 136 linux32, flock, LINUX_F_SETLK); 137 default: 138 break; 139 } 140 141 NETBSD32TO64_UAP(fd); 142 SCARG(&ua, cmd) = cmd; 143 NETBSD32TOP_UAP(arg, void); 144 145 return linux_sys_fcntl(l, &ua, retval); 146 } 147 148 int 149 linux32_sys_fadvise64(struct lwp *l, 150 const struct linux32_sys_fadvise64_args *uap, register_t *retval) 151 { 152 /* { 153 syscallarg(int) fd; 154 syscallarg(off_t) offset; 155 syscallarg(size_t) len; 156 syscallarg(int) advice; 157 } */ 158 struct sys___posix_fadvise50_args ua; 159 160 /* Linux doesn't have the 'pad' pseudo-parameter */ 161 NETBSD32TO64_UAP(fd); 162 SCARG(&ua, PAD) = 0; 163 SCARG(&ua, offset) = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo); 164 SCARG(&ua, len) = SCARG(uap, len); 165 SCARG(&ua, advice) = linux_to_bsd_posix_fadv(SCARG(uap, advice)); 166 167 return sys___posix_fadvise50(l, &ua, retval); 168 } 169 170 int 171 linux32_sys_fadvise64_64(struct lwp *l, 172 const struct linux32_sys_fadvise64_64_args *uap, register_t *retval) 173 { 174 /* { 175 syscallarg(int) fd; 176 syscallarg(off_t) offset; 177 syscallarg(off_t) len; 178 syscallarg(int) advice; 179 } */ 180 struct sys___posix_fadvise50_args ua; 181 182 /* Linux doesn't have the 'pad' pseudo-parameter */ 183 NETBSD32TO64_UAP(fd); 184 SCARG(&ua, PAD) = 0; 185 SCARG(&ua, offset) = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo); 186 SCARG(&ua, len) = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo); 187 SCARG(&ua, advice) = linux_to_bsd_posix_fadv(SCARG(uap, advice)); 188 189 return sys___posix_fadvise50(l, &ua, retval); 190 } 191
Indexes created Thu Oct 02 14:10:14 GMT 2025