sys/compat/linux32/common/linux32_stat.c

   1 /*      $NetBSD: linux32_stat.c,v 1.15 2009/06/03 15:13:26 njoly 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_stat.c,v 1.15 2009/06/03 15:13:26 njoly Exp $");
  37
  38 #include <sys/types.h>
  39 #include <sys/param.h>
  40 #include <sys/fstypes.h>
  41 #include <sys/signal.h>
  42 #include <sys/dirent.h>
  43 #include <sys/kernel.h>
  44 #include <sys/namei.h>
  45 #include <sys/fcntl.h>
  46 #include <sys/filedesc.h>
  47 #include <sys/select.h>
  48 #include <sys/proc.h>
  49 #include <sys/ucred.h>
  50 #include <sys/swap.h>
  51 #include <sys/vfs_syscalls.h>
  52
  53 #include <machine/types.h>
  54
  55 #include <sys/syscallargs.h>
  56
  57 #include <compat/netbsd32/netbsd32.h>
  58 #include <compat/netbsd32/netbsd32_conv.h>
  59 #include <compat/netbsd32/netbsd32_syscallargs.h>
  60
  61 #include <compat/linux/common/linux_types.h>
  62 #include <compat/linux/common/linux_signal.h>
  63 #include <compat/linux/common/linux_machdep.h>
  64 #include <compat/linux/common/linux_misc.h>
  65 #include <compat/linux/common/linux_oldolduname.h>
  66 #include <compat/linux/common/linux_ipc.h>
  67 #include <compat/linux/common/linux_sem.h>
  68 #include <compat/linux/linux_syscallargs.h>
  69
  70 #include <compat/linux32/common/linux32_types.h>
  71 #include <compat/linux32/common/linux32_signal.h>
  72 #include <compat/linux32/common/linux32_machdep.h>
  73 #include <compat/linux32/common/linux32_sysctl.h>
  74 #include <compat/linux32/common/linux32_socketcall.h>
  75 #include <compat/linux32/linux32_syscallargs.h>
  76
  77 static inline void bsd_to_linux32_stat(struct stat *, struct linux32_stat *);
  78 static inline void bsd_to_linux32_stat64(struct stat *, struct linux32_stat64 *);
  79
  80 #define linux_fakedev(x,y) (x)
  81
  82 static inline void
  83 bsd_to_linux32_stat(struct stat *st, struct linux32_stat *st32)
  84 {
  85         memset(st32, 0, sizeof(*st32));
  86         st32->lst_dev = linux_fakedev(st->st_dev, 0);
  87         st32->lst_ino = st->st_ino;
  88         st32->lst_mode = st->st_mode;
  89         if (st->st_nlink >= (1 << 15))
  90                 st32->lst_nlink = (1 << 15) - 1;
  91         else
  92                 st32->lst_nlink = st->st_nlink;
  93         st32->lst_uid = st->st_uid;
  94         st32->lst_gid = st->st_gid;
  95         st32->lst_rdev = linux_fakedev(st->st_rdev, 0);
  96         st32->lst_size = st->st_size;
  97         st32->lst_blksize = st->st_blksize;
  98         st32->lst_blocks = st->st_blocks;
  99         st32->lst_atime = st->st_atime;
 100         st32->lst_mtime = st->st_mtime;
 101         st32->lst_ctime = st->st_ctime;
 102 #ifdef LINUX32_STAT_HAS_NSEC
 103         st32->lst_atime_nsec = st->st_atimensec;
 104         st32->lst_mtime_nsec = st->st_mtimensec;
 105         st32->lst_ctime_nsec = st->st_ctimensec;
 106 #endif
 107 }
 108
 109 static inline void
 110 bsd_to_linux32_stat64(struct stat *st, struct linux32_stat64 *st32)
 111 {
 112         memset(st32, 0, sizeof(*st32));
 113         st32->lst_dev = linux_fakedev(st->st_dev, 0);
 114         st32->lst_ino = st->st_ino;
 115         st32->lst_mode = st->st_mode;
 116         if (st->st_nlink >= (1 << 15))
 117                 st32->lst_nlink = (1 << 15) - 1;
 118         else
 119                 st32->lst_nlink = st->st_nlink;
 120         st32->lst_uid = st->st_uid;
 121         st32->lst_gid = st->st_gid;
 122         st32->lst_rdev = linux_fakedev(st->st_rdev, 0);
 123         st32->lst_size = st->st_size;
 124         st32->lst_blksize = st->st_blksize;
 125         st32->lst_blocks = st->st_blocks;
 126         st32->lst_atime = st->st_atime;
 127         st32->lst_mtime = st->st_mtime;
 128         st32->lst_ctime = st->st_ctime;
 129 #ifdef LINUX32_STAT64_HAS_NSEC
 130         st32->lst_atime_nsec = st->st_atimensec;
 131         st32->lst_mtime_nsec = st->st_mtimensec;
 132         st32->lst_ctime_nsec = st->st_ctimensec;
 133 #endif
 134 #ifdef LINUX32_STAT64_HAS_BROKEN_ST_INO
 135         st32->__lst_ino = st->st_ino;
 136 #endif
 137 }
 138
 139 int
 140 linux32_sys_stat(struct lwp *l, const struct linux32_sys_stat_args *uap, register_t *retval)
 141 {
 142         /* {
 143                 syscallarg(netbsd32_charp) path;
 144                 syscallarg(linux32_statp) sp;
 145         } */
 146         int error;
 147         struct stat st;
 148         struct linux32_stat st32;
 149
 150         error = do_sys_stat(SCARG_P32(uap, path), FOLLOW, &st);
 151         if (error != 0)
 152                 return error;
 153
 154         bsd_to_linux32_stat(&st, &st32);
 155         return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
 156 }
 157
 158 int
 159 linux32_sys_lstat(struct lwp *l, const struct linux32_sys_lstat_args *uap, register_t *retval)
 160 {
 161         /* {
 162                 syscallarg(netbsd32_charp) path;
 163                 syscallarg(linux32_statp) sp;
 164         } */
 165         int error;
 166         struct stat st;
 167         struct linux32_stat st32;
 168
 169         error = do_sys_stat(SCARG_P32(uap, path), NOFOLLOW, &st);
 170         if (error != 0)
 171                 return error;
 172
 173         bsd_to_linux32_stat(&st, &st32);
 174         return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
 175 }
 176
 177 int
 178 linux32_sys_fstat(struct lwp *l, const struct linux32_sys_fstat_args *uap, register_t *retval)
 179 {
 180         /* {
 181                 syscallarg(int) fd;
 182                 syscallarg(linux32_statp) sp;
 183         } */
 184         int error;
 185         struct stat st;
 186         struct linux32_stat st32;
 187
 188         error = do_sys_fstat(SCARG(uap, fd), &st);
 189         if (error != 0)
 190                 return error;
 191
 192         bsd_to_linux32_stat(&st, &st32);
 193         return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
 194 }
 195
 196 int
 197 linux32_sys_stat64(struct lwp *l, const struct linux32_sys_stat64_args *uap, register_t *retval)
 198 {
 199         /* {
 200                 syscallarg(netbsd32_charp) path;
 201                 syscallarg(linux32_stat64p) sp;
 202         } */
 203         int error;
 204         struct stat st;
 205         struct linux32_stat64 st32;
 206
 207         error = do_sys_stat(SCARG_P32(uap, path), FOLLOW, &st);
 208         if (error != 0)
 209                 return error;
 210
 211         bsd_to_linux32_stat64(&st, &st32);
 212         return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
 213 }
 214
 215 int
 216 linux32_sys_lstat64(struct lwp *l, const struct linux32_sys_lstat64_args *uap, register_t *retval)
 217 {
 218         /* {
 219                 syscallarg(netbsd32_charp) path;
 220                 syscallarg(linux32_stat64p) sp;
 221         } */
 222         int error;
 223         struct stat st;
 224         struct linux32_stat64 st32;
 225
 226         error = do_sys_stat(SCARG_P32(uap, path), NOFOLLOW, &st);
 227         if (error != 0)
 228                 return error;
 229
 230         bsd_to_linux32_stat64(&st, &st32);
 231         return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
 232 }
 233
 234 int
 235 linux32_sys_fstat64(struct lwp *l, const struct linux32_sys_fstat64_args *uap, register_t *retval)
 236 {
 237         /* {
 238                 syscallarg(int) fd;
 239                 syscallarg(linux32_stat64p) sp;
 240         } */
 241         int error;
 242         struct stat st;
 243         struct linux32_stat64 st32;
 244
 245         error = do_sys_fstat(SCARG(uap, fd), &st);
 246         if (error != 0)
 247                 return error;
 248
 249         bsd_to_linux32_stat64(&st, &st32);
 250         return copyout(&st32, SCARG_P32(uap, sp), sizeof(st32));
 251 }