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