linux_file64.c revision 1.2.4.4
1 /* $NetBSD: linux_file64.c,v 1.2.4.4 2001/11/14 19:13:10 nathanw 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_file64.c,v 1.2.4.4 2001/11/14 19:13:10 nathanw 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/file.h> 51 #include <sys/stat.h> 52 #include <sys/filedesc.h> 53 #include <sys/ioctl.h> 54 #include <sys/kernel.h> 55 #include <sys/mount.h> 56 #include <sys/malloc.h> 57 #include <sys/vnode.h> 58 #include <sys/tty.h> 59 #include <sys/conf.h> 60 61 #include <sys/syscallargs.h> 62 63 #include <compat/linux/common/linux_types.h> 64 #include <compat/linux/common/linux_signal.h> 65 #include <compat/linux/common/linux_fcntl.h> 66 #include <compat/linux/common/linux_util.h> 67 #include <compat/linux/common/linux_machdep.h> 68 69 #include <compat/linux/linux_syscallargs.h> 70 71 static void bsd_to_linux_stat __P((struct stat *, struct linux_stat64 *)); 72 static int linux_do_stat64 __P((struct lwp *, void *, register_t *, int)); 73 74 /* 75 * Convert a NetBSD stat structure to a Linux stat structure. 76 * Only the order of the fields and the padding in the structure 77 * is different. linux_fakedev is a machine-dependent function 78 * which optionally converts device driver major/minor numbers 79 * (XXX horrible, but what can you do against code that compares 80 * things against constant major device numbers? sigh) 81 */ 82 static void 83 bsd_to_linux_stat(bsp, lsp) 84 struct stat *bsp; 85 struct linux_stat64 *lsp; 86 { 87 lsp->lst_dev = bsp->st_dev; 88 lsp->lst_ino = bsp->st_ino; 89 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 90 if (bsp->st_nlink >= (1 << 15)) 91 lsp->lst_nlink = (1 << 15) - 1; 92 else 93 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 94 lsp->lst_uid = bsp->st_uid; 95 lsp->lst_gid = bsp->st_gid; 96 lsp->lst_rdev = linux_fakedev(bsp->st_rdev); 97 lsp->lst_size = bsp->st_size; 98 lsp->lst_blksize = bsp->st_blksize; 99 lsp->lst_blocks = bsp->st_blocks; 100 lsp->lst_atime = bsp->st_atime; 101 lsp->lst_mtime = bsp->st_mtime; 102 lsp->lst_ctime = bsp->st_ctime; 103 } 104 105 /* 106 * The stat functions below are plain sailing. stat and lstat are handled 107 * by one function to avoid code duplication. 108 */ 109 int 110 linux_sys_fstat64(l, v, retval) 111 struct lwp *l; 112 void *v; 113 register_t *retval; 114 { 115 struct linux_sys_fstat64_args /* { 116 syscallarg(int) fd; 117 syscallarg(struct linux_stat64 *) sp; 118 } */ *uap = v; 119 struct proc *p = l->l_proc; 120 struct sys___fstat13_args fsa; 121 struct linux_stat64 tmplst; 122 struct stat *st,tmpst; 123 caddr_t sg; 124 int error; 125 126 sg = stackgap_init(p->p_emul); 127 128 st = stackgap_alloc(&sg, sizeof (struct stat)); 129 130 SCARG(&fsa, fd) = SCARG(uap, fd); 131 SCARG(&fsa, sb) = st; 132 133 if ((error = sys___fstat13(l, &fsa, retval))) 134 return error; 135 136 if ((error = copyin(st, &tmpst, sizeof tmpst))) 137 return error; 138 139 bsd_to_linux_stat(&tmpst, &tmplst); 140 141 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 142 return error; 143 144 return 0; 145 } 146 147 static int 148 linux_do_stat64(l, v, retval, dolstat) 149 struct lwp *l; 150 void *v; 151 register_t *retval; 152 int dolstat; 153 { 154 struct proc *p = l->l_proc; 155 struct sys___stat13_args sa; 156 struct linux_stat64 tmplst; 157 struct stat *st, tmpst; 158 caddr_t sg; 159 int error; 160 struct linux_sys_stat64_args *uap = v; 161 162 sg = stackgap_init(p->p_emul); 163 st = stackgap_alloc(&sg, sizeof (struct stat)); 164 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 165 166 SCARG(&sa, ub) = st; 167 SCARG(&sa, path) = SCARG(uap, path); 168 169 if ((error = (dolstat ? sys___lstat13(l, &sa, retval) : 170 sys___stat13(l, &sa, retval)))) 171 return error; 172 173 if ((error = copyin(st, &tmpst, sizeof tmpst))) 174 return error; 175 176 bsd_to_linux_stat(&tmpst, &tmplst); 177 178 if ((error = copyout(&tmplst, SCARG(uap, sp), sizeof tmplst))) 179 return error; 180 181 return 0; 182 } 183 184 int 185 linux_sys_stat64(l, v, retval) 186 struct lwp *l; 187 void *v; 188 register_t *retval; 189 { 190 struct linux_sys_stat64_args /* { 191 syscallarg(const char *) path; 192 syscallarg(struct linux_stat64 *) sp; 193 } */ *uap = v; 194 195 return linux_do_stat64(l, uap, retval, 0); 196 } 197 198 int 199 linux_sys_lstat64(l, v, retval) 200 struct lwp *l; 201 void *v; 202 register_t *retval; 203 { 204 struct linux_sys_lstat64_args /* { 205 syscallarg(const char *) path; 206 syscallarg(struct linux_stat64 *) sp; 207 } */ *uap = v; 208 209 return linux_do_stat64(l, uap, retval, 1); 210 } 211 212 int 213 linux_sys_truncate64(l, v, retval) 214 struct lwp *l; 215 void *v; 216 register_t *retval; 217 { 218 struct linux_sys_truncate64_args /* { 219 syscallarg(const char *) path; 220 syscallarg(off_t) length; 221 } */ *uap = v; 222 struct proc *p = l->l_proc; 223 caddr_t sg = stackgap_init(p->p_emul); 224 225 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 226 227 return sys_truncate(l, uap, retval); 228 } 229 230 #ifdef __mips__ /* i386 and powerpc could use it too */ 231 int 232 linux_sys_fcntl64(p, v, retval) 233 struct proc *p; 234 void *v; 235 register_t *retval; 236 { 237 struct linux_sys_fcntl64_args /* { 238 syscallarg(unsigned int) fd; 239 syscallarg(unsigned int) cmd; 240 syscallarg(unsigned long) arg; 241 } */ *uap = v; 242 unsigned int fd, cmd; 243 unsigned long arg; 244 int error; 245 246 fd = SCARG(uap, fd); 247 cmd = SCARG(uap, cmd); 248 arg = SCARG(uap, arg); 249 250 switch (cmd) { 251 /* XXX implement this later */ 252 case LINUX_F_GETLK64: 253 error = 0; 254 break; 255 case LINUX_F_SETLK64: 256 error = 0; 257 break; 258 case LINUX_F_SETLKW64: 259 error = 0; 260 break; 261 default: 262 error = linux_sys_fcntl(p, v, retval); 263 break; 264 } 265 266 return error; 267 } 268 #endif /* __mips__ */ 269
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