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 statfs *bsd_statfs, 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 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 241 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 242 linux_statfs->f_namelen = MAXNAMLEN; 243 } 244 245 int 246 linux_statfs(struct thread *td, struct linux_statfs_args *args) 247 { 248 struct l_statfs linux_statfs; 249 struct statfs bsd_statfs; 250 char *path; 251 int error; 252 253 LCONVPATHEXIST(td, args->path, &path); 254 255 #ifdef DEBUG 256 if (ldebug(statfs)) 257 printf(ARGS(statfs, "%s, *"), path); 258 #endif 259 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 260 LFREEPATH(path); 261 if (error) 262 return (error); 263 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 264 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 265 } 266 267 int 268 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 269 { 270 struct l_statfs linux_statfs; 271 struct statfs bsd_statfs; 272 int error; 273 274 #ifdef DEBUG 275 if (ldebug(fstatfs)) 276 printf(ARGS(fstatfs, "%d, *"), args->fd); 277 #endif 278 error = kern_fstatfs(td, args->fd, &bsd_statfs); 279 if (error) 280 return error; 281 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 282 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 283 } 284 285 struct l_ustat 286 { 287 l_daddr_t f_tfree; 288 l_ino_t f_tinode; 289 char f_fname[6]; 290 char f_fpack[6]; 291 }; 292 293 int 294 linux_ustat(struct thread *td, struct linux_ustat_args *args) 295 { 296 #ifdef DEBUG 297 if (ldebug(ustat)) 298 printf(ARGS(ustat, "%d, *"), args->dev); 299 #endif 300 301 return (EOPNOTSUPP); 302 303 #ifdef not_that_way 304 struct l_ustat lu; 305 struct cdev *dev; 306 struct vnode *vp; 307 struct statfs *stat; 308 int error; 309 310 311 /* 312 * lu.f_fname and lu.f_fpack are not used. They are always zeroed. 313 * lu.f_tinode and lu.f_tfree are set from the device's super block. 314 */ 315 bzero(&lu, sizeof(lu)); 316 317 /* 318 * XXX - Don't return an error if we can't find a vnode for the 319 * device. Our struct cdev *is 32-bits whereas Linux only has a 16-bits 320 * struct cdev *. The struct cdev *that is used now may as well be a truncated 321 * struct cdev *returned from previous syscalls. Just return a bzeroed 322 * ustat in that case. 323 * 324 * XXX: findcdev() SHALL not be used this way. Somebody (TM) will 325 * have to find a better way. It may be that we should stick 326 * a dev_t into struct mount, and walk the mountlist for a 327 * perfect match and failing that try again looking for a 328 * minor-truncated match. 329 */ 330 dev = findcdev(makedev(args->dev >> 8, args->dev & 0xFF)); 331 if (dev != NULL && vfinddev(dev, &vp)) { 332 if (vp->v_mount == NULL) 333 return (EINVAL); 334 #ifdef MAC 335 error = mac_check_mount_stat(td->td_ucred, vp->v_mount); 336 if (error) 337 return (error); 338 #endif 339 stat = &(vp->v_mount->mnt_stat); 340 error = VFS_STATFS(vp->v_mount, stat, td); 341 if (error) 342 return (error); 343 344 lu.f_tfree = stat->f_bfree; 345 lu.f_tinode = stat->f_ffree; 346 } 347 348 return (copyout(&lu, args->ubuf, sizeof(lu))); 349 #endif 350 } 351 352 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 353 354 static int 355 stat64_copyout(struct stat *buf, void *ubuf) 356 { 357 struct l_stat64 lbuf; 358 359 bzero(&lbuf, sizeof(lbuf)); 360 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 361 lbuf.st_ino = buf->st_ino; 362 lbuf.st_mode = buf->st_mode; 363 lbuf.st_nlink = buf->st_nlink; 364 lbuf.st_uid = buf->st_uid; 365 lbuf.st_gid = buf->st_gid; 366 lbuf.st_rdev = buf->st_rdev; 367 lbuf.st_size = buf->st_size; 368 lbuf.st_atime = buf->st_atime; 369 lbuf.st_mtime = buf->st_mtime; 370 lbuf.st_ctime = buf->st_ctime; 371 lbuf.st_blksize = buf->st_blksize; 372 lbuf.st_blocks = buf->st_blocks; 373 374 /* 375 * The __st_ino field makes all the difference. In the Linux kernel 376 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 377 * but without the assignment to __st_ino the runtime linker refuses 378 * to mmap(2) any shared libraries. I guess it's broken alright :-) 379 */ 380 lbuf.__st_ino = buf->st_ino; 381 382 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 383 } 384 385 int 386 linux_stat64(struct thread *td, struct linux_stat64_args *args) 387 { 388 struct stat buf; 389 char *filename; 390 int error; 391 392 LCONVPATHEXIST(td, args->filename, &filename); 393 394 #ifdef DEBUG 395 if (ldebug(stat64)) 396 printf(ARGS(stat64, "%s, *"), filename); 397 #endif 398 399 error = kern_stat(td, filename, UIO_SYSSPACE, &buf); 400 LFREEPATH(filename); 401 if (error) 402 return (error); 403 return (stat64_copyout(&buf, args->statbuf)); 404 } 405 406 int 407 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 408 { 409 struct stat sb; 410 char *filename; 411 int error; 412 413 LCONVPATHEXIST(td, args->filename, &filename); 414 415 #ifdef DEBUG 416 if (ldebug(lstat64)) 417 printf(ARGS(lstat64, "%s, *"), args->filename); 418 #endif 419 420 error = kern_lstat(td, filename, UIO_SYSSPACE, &sb); 421 LFREEPATH(filename); 422 if (error) 423 return (error); 424 return (stat64_copyout(&sb, args->statbuf)); 425 } 426 427 int 428 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 429 { 430 struct stat buf; 431 int error; 432 433 #ifdef DEBUG 434 if (ldebug(fstat64)) 435 printf(ARGS(fstat64, "%d, *"), args->fd); 436 #endif 437 438 error = kern_fstat(td, args->fd, &buf); 439 if (!error) 440 error = stat64_copyout(&buf, args->statbuf); 441 442 return (error); 443 } 444 445 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 446