1 /*- 2 * Copyright (c) 1994-1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 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. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_mac.h" 33 34 #include <sys/param.h> 35 #include <sys/dirent.h> 36 #include <sys/file.h> 37 #include <sys/filedesc.h> 38 #include <sys/proc.h> 39 #include <sys/mac.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/namei.h> 43 #include <sys/stat.h> 44 #include <sys/syscallsubr.h> 45 #include <sys/systm.h> 46 #include <sys/vnode.h> 47 48 #include "opt_compat.h" 49 50 #ifdef COMPAT_LINUX32 51 #include <machine/../linux32/linux.h> 52 #include <machine/../linux32/linux32_proto.h> 53 #else 54 #include <machine/../linux/linux.h> 55 #include <machine/../linux/linux_proto.h> 56 #endif 57 58 #include <compat/linux/linux_util.h> 59 60 /* 61 * XXX: This was removed from newstat_copyout(), and almost identical 62 * XXX: code was in stat64_copyout(). findcdev() needs to be replaced 63 * XXX: with something that does lookup and locking properly. 64 * XXX: When somebody fixes this: please try to avoid duplicating it. 65 */ 66 #if 0 67 static void 68 disk_foo(struct somestat *tbuf) 69 { 70 struct cdevsw *cdevsw; 71 struct cdev *dev; 72 73 /* Lie about disk drives which are character devices 74 * in FreeBSD but block devices under Linux. 75 */ 76 if (S_ISCHR(tbuf.st_mode) && 77 (dev = findcdev(buf->st_rdev)) != NULL) { 78 cdevsw = dev_refthread(dev); 79 if (cdevsw != NULL) { 80 if (cdevsw->d_flags & D_DISK) { 81 tbuf.st_mode &= ~S_IFMT; 82 tbuf.st_mode |= S_IFBLK; 83 84 /* XXX this may not be quite right */ 85 /* Map major number to 0 */ 86 tbuf.st_dev = uminor(buf->st_dev) & 0xf; 87 tbuf.st_rdev = buf->st_rdev & 0xff; 88 } 89 dev_relthread(dev); 90 } 91 } 92 93 } 94 #endif 95 96 static int 97 newstat_copyout(struct stat *buf, void *ubuf) 98 { 99 struct l_newstat tbuf; 100 101 bzero(&tbuf, sizeof(tbuf)); 102 tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 103 tbuf.st_ino = buf->st_ino; 104 tbuf.st_mode = buf->st_mode; 105 tbuf.st_nlink = buf->st_nlink; 106 tbuf.st_uid = buf->st_uid; 107 tbuf.st_gid = buf->st_gid; 108 tbuf.st_rdev = buf->st_rdev; 109 tbuf.st_size = buf->st_size; 110 tbuf.st_atime = buf->st_atime; 111 tbuf.st_mtime = buf->st_mtime; 112 tbuf.st_ctime = buf->st_ctime; 113 tbuf.st_blksize = buf->st_blksize; 114 tbuf.st_blocks = buf->st_blocks; 115 116 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 117 } 118 119 int 120 linux_newstat(struct thread *td, struct linux_newstat_args *args) 121 { 122 struct stat buf; 123 char *path; 124 int error; 125 126 LCONVPATHEXIST(td, args->path, &path); 127 128 #ifdef DEBUG 129 if (ldebug(newstat)) 130 printf(ARGS(newstat, "%s, *"), path); 131 #endif 132 133 error = kern_stat(td, path, UIO_SYSSPACE, &buf); 134 LFREEPATH(path); 135 if (error) 136 return (error); 137 return (newstat_copyout(&buf, args->buf)); 138 } 139 140 int 141 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 142 { 143 struct stat sb; 144 char *path; 145 int error; 146 147 LCONVPATHEXIST(td, args->path, &path); 148 149 #ifdef DEBUG 150 if (ldebug(newlstat)) 151 printf(ARGS(newlstat, "%s, *"), path); 152 #endif 153 154 error = kern_lstat(td, path, UIO_SYSSPACE, &sb); 155 LFREEPATH(path); 156 if (error) 157 return (error); 158 return (newstat_copyout(&sb, args->buf)); 159 } 160 161 int 162 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 163 { 164 struct stat buf; 165 int error; 166 167 #ifdef DEBUG 168 if (ldebug(newfstat)) 169 printf(ARGS(newfstat, "%d, *"), args->fd); 170 #endif 171 172 error = kern_fstat(td, args->fd, &buf); 173 if (!error) 174 error = newstat_copyout(&buf, args->buf); 175 176 return (error); 177 } 178 179 /* XXX - All fields of type l_int are defined as l_long on i386 */ 180 struct l_statfs { 181 l_int f_type; 182 l_int f_bsize; 183 l_int f_blocks; 184 l_int f_bfree; 185 l_int f_bavail; 186 l_int f_files; 187 l_int f_ffree; 188 l_fsid_t f_fsid; 189 l_int f_namelen; 190 l_int f_spare[6]; 191 }; 192 193 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 194 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 195 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 196 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 197 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 198 #define LINUX_NCP_SUPER_MAGIC 0x564cL 199 #define LINUX_NFS_SUPER_MAGIC 0x6969L 200 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 201 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 202 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 203 204 static long 205 bsd_to_linux_ftype(const char *fstypename) 206 { 207 int i; 208 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 209 {"ufs", LINUX_UFS_SUPER_MAGIC}, 210 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 211 {"nfs", LINUX_NFS_SUPER_MAGIC}, 212 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 213 {"procfs", LINUX_PROC_SUPER_MAGIC}, 214 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 215 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 216 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 217 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 218 {"coda", LINUX_CODA_SUPER_MAGIC}, 219 {NULL, 0L}}; 220 221 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 222 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 223 return (b2l_tbl[i].linux_type); 224 225 return (0L); 226 } 227 228 static void 229 bsd_to_linux_statfs(struct thread *td, struct statfs *bsd_statfs, 230 struct l_statfs *linux_statfs) 231 { 232 233 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 234 linux_statfs->f_bsize = bsd_statfs->f_bsize; 235 linux_statfs->f_blocks = bsd_statfs->f_blocks; 236 linux_statfs->f_bfree = bsd_statfs->f_bfree; 237 linux_statfs->f_bavail = bsd_statfs->f_bavail; 238 linux_statfs->f_ffree = bsd_statfs->f_ffree; 239 linux_statfs->f_files = bsd_statfs->f_files; 240 if (suser(td)) { 241 linux_statfs->f_fsid.val[0] = 0; 242 linux_statfs->f_fsid.val[1] = 0; 243 } else { 244 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 245 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 246 } 247 linux_statfs->f_namelen = MAXNAMLEN; 248 } 249 250 int 251 linux_statfs(struct thread *td, struct linux_statfs_args *args) 252 { 253 struct l_statfs linux_statfs; 254 struct statfs bsd_statfs; 255 char *path; 256 int error; 257 258 LCONVPATHEXIST(td, args->path, &path); 259 260 #ifdef DEBUG 261 if (ldebug(statfs)) 262 printf(ARGS(statfs, "%s, *"), path); 263 #endif 264 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 265 LFREEPATH(path); 266 if (error) 267 return (error); 268 bsd_to_linux_statfs(td, &bsd_statfs, &linux_statfs); 269 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 270 } 271 272 int 273 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 274 { 275 struct l_statfs linux_statfs; 276 struct statfs bsd_statfs; 277 int error; 278 279 #ifdef DEBUG 280 if (ldebug(fstatfs)) 281 printf(ARGS(fstatfs, "%d, *"), args->fd); 282 #endif 283 error = kern_fstatfs(td, args->fd, &bsd_statfs); 284 if (error) 285 return error; 286 bsd_to_linux_statfs(td, &bsd_statfs, &linux_statfs); 287 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 288 } 289 290 struct l_ustat 291 { 292 l_daddr_t f_tfree; 293 l_ino_t f_tinode; 294 char f_fname[6]; 295 char f_fpack[6]; 296 }; 297 298 int 299 linux_ustat(struct thread *td, struct linux_ustat_args *args) 300 { 301 #ifdef DEBUG 302 if (ldebug(ustat)) 303 printf(ARGS(ustat, "%d, *"), args->dev); 304 #endif 305 306 return (EOPNOTSUPP); 307 308 #ifdef not_that_way 309 struct l_ustat lu; 310 struct cdev *dev; 311 struct vnode *vp; 312 struct statfs *stat; 313 int error; 314 315 316 /* 317 * lu.f_fname and lu.f_fpack are not used. They are always zeroed. 318 * lu.f_tinode and lu.f_tfree are set from the device's super block. 319 */ 320 bzero(&lu, sizeof(lu)); 321 322 /* 323 * XXX - Don't return an error if we can't find a vnode for the 324 * device. Our struct cdev *is 32-bits whereas Linux only has a 16-bits 325 * struct cdev *. The struct cdev *that is used now may as well be a truncated 326 * struct cdev *returned from previous syscalls. Just return a bzeroed 327 * ustat in that case. 328 * 329 * XXX: findcdev() SHALL not be used this way. Somebody (TM) will 330 * have to find a better way. It may be that we should stick 331 * a dev_t into struct mount, and walk the mountlist for a 332 * perfect match and failing that try again looking for a 333 * minor-truncated match. 334 */ 335 dev = findcdev(makedev(args->dev >> 8, args->dev & 0xFF)); 336 if (dev != NULL && vfinddev(dev, &vp)) { 337 if (vp->v_mount == NULL) 338 return (EINVAL); 339 #ifdef MAC 340 error = mac_check_mount_stat(td->td_ucred, vp->v_mount); 341 if (error) 342 return (error); 343 #endif 344 stat = &(vp->v_mount->mnt_stat); 345 error = VFS_STATFS(vp->v_mount, stat, td); 346 if (error) 347 return (error); 348 349 lu.f_tfree = stat->f_bfree; 350 lu.f_tinode = stat->f_ffree; 351 } 352 353 return (copyout(&lu, args->ubuf, sizeof(lu))); 354 #endif 355 } 356 357 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 358 359 static int 360 stat64_copyout(struct stat *buf, void *ubuf) 361 { 362 struct l_stat64 lbuf; 363 364 bzero(&lbuf, sizeof(lbuf)); 365 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 366 lbuf.st_ino = buf->st_ino; 367 lbuf.st_mode = buf->st_mode; 368 lbuf.st_nlink = buf->st_nlink; 369 lbuf.st_uid = buf->st_uid; 370 lbuf.st_gid = buf->st_gid; 371 lbuf.st_rdev = buf->st_rdev; 372 lbuf.st_size = buf->st_size; 373 lbuf.st_atime = buf->st_atime; 374 lbuf.st_mtime = buf->st_mtime; 375 lbuf.st_ctime = buf->st_ctime; 376 lbuf.st_blksize = buf->st_blksize; 377 lbuf.st_blocks = buf->st_blocks; 378 379 /* 380 * The __st_ino field makes all the difference. In the Linux kernel 381 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 382 * but without the assignment to __st_ino the runtime linker refuses 383 * to mmap(2) any shared libraries. I guess it's broken alright :-) 384 */ 385 lbuf.__st_ino = buf->st_ino; 386 387 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 388 } 389 390 int 391 linux_stat64(struct thread *td, struct linux_stat64_args *args) 392 { 393 struct stat buf; 394 char *filename; 395 int error; 396 397 LCONVPATHEXIST(td, args->filename, &filename); 398 399 #ifdef DEBUG 400 if (ldebug(stat64)) 401 printf(ARGS(stat64, "%s, *"), filename); 402 #endif 403 404 error = kern_stat(td, filename, UIO_SYSSPACE, &buf); 405 LFREEPATH(filename); 406 if (error) 407 return (error); 408 return (stat64_copyout(&buf, args->statbuf)); 409 } 410 411 int 412 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 413 { 414 struct stat sb; 415 char *filename; 416 int error; 417 418 LCONVPATHEXIST(td, args->filename, &filename); 419 420 #ifdef DEBUG 421 if (ldebug(lstat64)) 422 printf(ARGS(lstat64, "%s, *"), args->filename); 423 #endif 424 425 error = kern_lstat(td, filename, UIO_SYSSPACE, &sb); 426 LFREEPATH(filename); 427 if (error) 428 return (error); 429 return (stat64_copyout(&sb, args->statbuf)); 430 } 431 432 int 433 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 434 { 435 struct stat buf; 436 int error; 437 438 #ifdef DEBUG 439 if (ldebug(fstat64)) 440 printf(ARGS(fstat64, "%d, *"), args->fd); 441 #endif 442 443 error = kern_fstat(td, args->fd, &buf); 444 if (!error) 445 error = stat64_copyout(&buf, args->statbuf); 446 447 return (error); 448 } 449 450 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 451