linux_fcntl64.c revision 1.1
1 /* $NetBSD: linux_fcntl64.c,v 1.1 2008/02/02 19:37:53 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Linux 64bit filesystem calls. Used on 32bit archs, not used on 64bit ones. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: linux_fcntl64.c,v 1.1 2008/02/02 19:37:53 dsl Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/namei.h> 49 #include <sys/proc.h> 50 #include <sys/dirent.h> 51 #include <sys/file.h> 52 #include <sys/stat.h> 53 #include <sys/filedesc.h> 54 #include <sys/ioctl.h> 55 #include <sys/kernel.h> 56 #include <sys/mount.h> 57 #include <sys/malloc.h> 58 #include <sys/namei.h> 59 #include <sys/vfs_syscalls.h> 60 #include <sys/vnode.h> 61 #include <sys/tty.h> 62 #include <sys/conf.h> 63 64 #include <sys/syscallargs.h> 65 66 #include <compat/linux/common/linux_types.h> 67 #include <compat/linux/common/linux_signal.h> 68 #include <compat/linux/common/linux_fcntl.h> 69 #include <compat/linux/common/linux_util.h> 70 #include <compat/linux/common/linux_machdep.h> 71 #include <compat/linux/common/linux_dirent.h> 72 #include <compat/linux/common/linux_ipc.h> 73 #include <compat/linux/common/linux_sem.h> 74 75 #include <compat/linux/linux_syscallargs.h> 76 77 # if !defined(__m68k__) && (!defined(__amd64__) || defined(COMPAT_LINUX32)) 78 static void bsd_to_linux_flock64(struct linux_flock64 *, 79 const struct flock *); 80 static void linux_to_bsd_flock64(struct flock *, 81 const struct linux_flock64 *); 82 83 static void 84 bsd_to_linux_flock64(struct linux_flock64 *lfp, const struct flock *bfp) 85 { 86 87 lfp->l_start = bfp->l_start; 88 lfp->l_len = bfp->l_len; 89 lfp->l_pid = bfp->l_pid; 90 lfp->l_whence = bfp->l_whence; 91 switch (bfp->l_type) { 92 case F_RDLCK: 93 lfp->l_type = LINUX_F_RDLCK; 94 break; 95 case F_UNLCK: 96 lfp->l_type = LINUX_F_UNLCK; 97 break; 98 case F_WRLCK: 99 lfp->l_type = LINUX_F_WRLCK; 100 break; 101 } 102 } 103 104 static void 105 linux_to_bsd_flock64(struct flock *bfp, const struct linux_flock64 *lfp) 106 { 107 108 bfp->l_start = lfp->l_start; 109 bfp->l_len = lfp->l_len; 110 bfp->l_pid = lfp->l_pid; 111 bfp->l_whence = lfp->l_whence; 112 switch (lfp->l_type) { 113 case LINUX_F_RDLCK: 114 bfp->l_type = F_RDLCK; 115 break; 116 case LINUX_F_UNLCK: 117 bfp->l_type = F_UNLCK; 118 break; 119 case LINUX_F_WRLCK: 120 bfp->l_type = F_WRLCK; 121 break; 122 } 123 } 124 125 int 126 linux_sys_fcntl64(struct lwp *l, const struct linux_sys_fcntl64_args *uap, register_t *retval) 127 { 128 /* { 129 syscallarg(int) fd; 130 syscallarg(int) cmd; 131 syscallarg(void *) arg; 132 } */ 133 struct linux_flock64 lfl; 134 struct flock bfl; 135 int error; 136 void *arg = SCARG(uap, arg); 137 int cmd = SCARG(uap, cmd); 138 int fd = SCARG(uap, fd); 139 140 switch (cmd) { 141 case LINUX_F_GETLK64: 142 if ((error = copyin(arg, &lfl, sizeof lfl)) != 0) 143 return error; 144 linux_to_bsd_flock64(&bfl, &lfl); 145 error = do_fcntl_lock(l, fd, F_GETLK, &bfl); 146 if (error != 0) 147 return error; 148 bsd_to_linux_flock64(&lfl, &bfl); 149 return copyout(&lfl, arg, sizeof lfl); 150 case LINUX_F_SETLK64: 151 case LINUX_F_SETLKW64: 152 cmd = (cmd == LINUX_F_SETLK64 ? F_SETLK : F_SETLKW); 153 if ((error = copyin(arg, &lfl, sizeof lfl)) != 0) 154 return error; 155 linux_to_bsd_flock64(&bfl, &lfl); 156 return do_fcntl_lock(l, fd, cmd, &bfl); 157 default: 158 return linux_sys_fcntl(l, (const void *)uap, retval); 159 } 160 } 161 # endif /* !m69k && !amd64 && !COMPAT_LINUX32 */ 162
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