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 withough 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 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/conf.h> 33 #include <sys/dirent.h> 34 #include <sys/file.h> 35 #include <sys/filedesc.h> 36 #include <sys/proc.h> 37 #include <sys/mount.h> 38 #include <sys/namei.h> 39 #include <sys/stat.h> 40 #include <sys/sysctl.h> 41 #include <sys/systm.h> 42 #include <sys/vnode.h> 43 44 #include <machine/../linux/linux.h> 45 #include <machine/../linux/linux_proto.h> 46 #include <compat/linux/linux_util.h> 47 48 static int 49 newstat_copyout(struct stat *buf, void *ubuf) 50 { 51 struct l_newstat tbuf; 52 struct cdevsw *cdevsw; 53 dev_t dev; 54 55 tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 56 tbuf.st_ino = buf->st_ino; 57 tbuf.st_mode = buf->st_mode; 58 tbuf.st_nlink = buf->st_nlink; 59 tbuf.st_uid = buf->st_uid; 60 tbuf.st_gid = buf->st_gid; 61 tbuf.st_rdev = buf->st_rdev; 62 tbuf.st_size = buf->st_size; 63 tbuf.st_atime = buf->st_atime; 64 tbuf.st_mtime = buf->st_mtime; 65 tbuf.st_ctime = buf->st_ctime; 66 tbuf.st_blksize = buf->st_blksize; 67 tbuf.st_blocks = buf->st_blocks; 68 69 /* Lie about disk drives which are character devices 70 * in FreeBSD but block devices under Linux. 71 */ 72 if (S_ISCHR(tbuf.st_mode) && 73 (dev = udev2dev(buf->st_rdev, 0)) != NODEV) { 74 cdevsw = devsw(dev); 75 if (cdevsw != NULL && (cdevsw->d_flags & D_DISK)) { 76 tbuf.st_mode &= ~S_IFMT; 77 tbuf.st_mode |= S_IFBLK; 78 79 /* XXX this may not be quite right */ 80 /* Map major number to 0 */ 81 tbuf.st_dev = uminor(buf->st_dev) & 0xf; 82 tbuf.st_rdev = buf->st_rdev & 0xff; 83 } 84 } 85 86 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 87 } 88 89 int 90 linux_newstat(struct thread *td, struct linux_newstat_args *args) 91 { 92 struct stat buf; 93 struct nameidata nd; 94 int error; 95 caddr_t sg; 96 97 sg = stackgap_init(); 98 CHECKALTEXIST(td, &sg, args->path); 99 100 #ifdef DEBUG 101 if (ldebug(newstat)) 102 printf(ARGS(newstat, "%s, *"), args->path); 103 #endif 104 105 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 106 args->path, td); 107 error = namei(&nd); 108 if (error) 109 return (error); 110 NDFREE(&nd, NDF_ONLY_PNBUF); 111 112 error = vn_stat(nd.ni_vp, &buf, td); 113 vput(nd.ni_vp); 114 if (error) 115 return (error); 116 117 return (newstat_copyout(&buf, args->buf)); 118 } 119 120 int 121 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 122 { 123 int error; 124 struct stat sb; 125 struct nameidata nd; 126 caddr_t sg; 127 128 sg = stackgap_init(); 129 CHECKALTEXIST(td, &sg, args->path); 130 131 #ifdef DEBUG 132 if (ldebug(newlstat)) 133 printf(ARGS(newlstat, "%s, *"), args->path); 134 #endif 135 136 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 137 args->path, td); 138 error = namei(&nd); 139 if (error) 140 return (error); 141 NDFREE(&nd, NDF_ONLY_PNBUF); 142 143 error = vn_stat(nd.ni_vp, &sb, td); 144 vput(nd.ni_vp); 145 if (error) 146 return (error); 147 148 return (newstat_copyout(&sb, args->buf)); 149 } 150 151 int 152 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 153 { 154 struct filedesc *fdp; 155 struct file *fp; 156 struct stat buf; 157 int error; 158 159 #ifdef DEBUG 160 if (ldebug(newfstat)) 161 printf(ARGS(newfstat, "%d, *"), args->fd); 162 #endif 163 164 fdp = td->td_proc->p_fd; 165 if ((unsigned)args->fd >= fdp->fd_nfiles || 166 (fp = fdp->fd_ofiles[args->fd]) == NULL) 167 return (EBADF); 168 169 error = fo_stat(fp, &buf, td); 170 if (!error) 171 error = newstat_copyout(&buf, args->buf); 172 173 return (error); 174 } 175 176 /* XXX - All fields of type l_int are defined as l_long on i386 */ 177 struct l_statfs { 178 l_int f_type; 179 l_int f_bsize; 180 l_int f_blocks; 181 l_int f_bfree; 182 l_int f_bavail; 183 l_int f_files; 184 l_int f_ffree; 185 l_fsid_t f_fsid; 186 l_int f_namelen; 187 l_int f_spare[6]; 188 }; 189 190 #ifndef VT_NWFS 191 #define VT_NWFS VT_TFS /* XXX - bug compat. with sys/fs/nwfs/nwfs_node.h */ 192 #endif 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 /* 206 * ext2fs uses the VT_UFS tag. A mounted ext2 filesystem will therefore 207 * be seen as an ufs filesystem. 208 */ 209 static long 210 bsd_to_linux_ftype(int tag) 211 { 212 213 switch (tag) { 214 case VT_CODA: 215 return (LINUX_CODA_SUPER_MAGIC); 216 case VT_HPFS: 217 return (LINUX_HPFS_SUPER_MAGIC); 218 case VT_ISOFS: 219 return (LINUX_ISOFS_SUPER_MAGIC); 220 case VT_MSDOSFS: 221 return (LINUX_MSDOS_SUPER_MAGIC); 222 case VT_NFS: 223 return (LINUX_NFS_SUPER_MAGIC); 224 case VT_NTFS: 225 return (LINUX_NTFS_SUPER_MAGIC); 226 case VT_NWFS: 227 return (LINUX_NCP_SUPER_MAGIC); 228 case VT_PROCFS: 229 return (LINUX_PROC_SUPER_MAGIC); 230 case VT_UFS: 231 return (LINUX_UFS_SUPER_MAGIC); 232 } 233 234 return (0L); 235 } 236 237 int 238 linux_statfs(struct thread *td, struct linux_statfs_args *args) 239 { 240 struct mount *mp; 241 struct nameidata *ndp; 242 struct statfs *bsd_statfs; 243 struct nameidata nd; 244 struct l_statfs linux_statfs; 245 int error; 246 caddr_t sg; 247 248 sg = stackgap_init(); 249 CHECKALTEXIST(td, &sg, args->path); 250 251 #ifdef DEBUG 252 if (ldebug(statfs)) 253 printf(ARGS(statfs, "%s, *"), args->path); 254 #endif 255 ndp = &nd; 256 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->path, curthread); 257 error = namei(ndp); 258 if (error) 259 return error; 260 NDFREE(ndp, NDF_ONLY_PNBUF); 261 mp = ndp->ni_vp->v_mount; 262 bsd_statfs = &mp->mnt_stat; 263 vrele(ndp->ni_vp); 264 error = VFS_STATFS(mp, bsd_statfs, td); 265 if (error) 266 return error; 267 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 268 linux_statfs.f_type = bsd_to_linux_ftype(bsd_statfs->f_type); 269 linux_statfs.f_bsize = bsd_statfs->f_bsize; 270 linux_statfs.f_blocks = bsd_statfs->f_blocks; 271 linux_statfs.f_bfree = bsd_statfs->f_bfree; 272 linux_statfs.f_bavail = bsd_statfs->f_bavail; 273 linux_statfs.f_ffree = bsd_statfs->f_ffree; 274 linux_statfs.f_files = bsd_statfs->f_files; 275 linux_statfs.f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 276 linux_statfs.f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 277 linux_statfs.f_namelen = MAXNAMLEN; 278 return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf, 279 sizeof(linux_statfs)); 280 } 281 282 int 283 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 284 { 285 struct file *fp; 286 struct mount *mp; 287 struct statfs *bsd_statfs; 288 struct l_statfs linux_statfs; 289 int error; 290 291 #ifdef DEBUG 292 if (ldebug(fstatfs)) 293 printf(ARGS(fstatfs, "%d, *"), args->fd); 294 #endif 295 error = getvnode(td->td_proc->p_fd, args->fd, &fp); 296 if (error) 297 return error; 298 mp = ((struct vnode *)fp->f_data)->v_mount; 299 bsd_statfs = &mp->mnt_stat; 300 error = VFS_STATFS(mp, bsd_statfs, td); 301 if (error) 302 return error; 303 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 304 linux_statfs.f_type = bsd_to_linux_ftype(bsd_statfs->f_type); 305 linux_statfs.f_bsize = bsd_statfs->f_bsize; 306 linux_statfs.f_blocks = bsd_statfs->f_blocks; 307 linux_statfs.f_bfree = bsd_statfs->f_bfree; 308 linux_statfs.f_bavail = bsd_statfs->f_bavail; 309 linux_statfs.f_ffree = bsd_statfs->f_ffree; 310 linux_statfs.f_files = bsd_statfs->f_files; 311 linux_statfs.f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 312 linux_statfs.f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 313 linux_statfs.f_namelen = MAXNAMLEN; 314 return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf, 315 sizeof(linux_statfs)); 316 } 317 318 struct l_ustat 319 { 320 l_daddr_t f_tfree; 321 l_ino_t f_tinode; 322 char f_fname[6]; 323 char f_fpack[6]; 324 }; 325 326 int 327 linux_ustat(struct thread *td, struct linux_ustat_args *args) 328 { 329 struct l_ustat lu; 330 dev_t dev; 331 struct vnode *vp; 332 struct statfs *stat; 333 int error; 334 335 #ifdef DEBUG 336 if (ldebug(ustat)) 337 printf(ARGS(ustat, "%d, *"), args->dev); 338 #endif 339 340 /* 341 * lu.f_fname and lu.f_fpack are not used. They are always zeroed. 342 * lu.f_tinode and lu.f_tfree are set from the device's super block. 343 */ 344 bzero(&lu, sizeof(lu)); 345 346 /* 347 * XXX - Don't return an error if we can't find a vnode for the 348 * device. Our dev_t is 32-bits whereas Linux only has a 16-bits 349 * dev_t. The dev_t that is used now may as well be a truncated 350 * dev_t returned from previous syscalls. Just return a bzeroed 351 * ustat in that case. 352 */ 353 dev = makedev(args->dev >> 8, args->dev & 0xFF); 354 if (vfinddev(dev, VCHR, &vp)) { 355 if (vp->v_mount == NULL) 356 return (EINVAL); 357 stat = &(vp->v_mount->mnt_stat); 358 error = VFS_STATFS(vp->v_mount, stat, td); 359 if (error) 360 return (error); 361 362 lu.f_tfree = stat->f_bfree; 363 lu.f_tinode = stat->f_ffree; 364 } 365 366 return (copyout(&lu, args->ubuf, sizeof(lu))); 367 } 368 369 #if defined(__i386__) 370 371 static int 372 stat64_copyout(struct stat *buf, void *ubuf) 373 { 374 struct l_stat64 lbuf; 375 376 bzero(&lbuf, sizeof(lbuf)); 377 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 378 lbuf.st_ino = buf->st_ino; 379 lbuf.st_mode = buf->st_mode; 380 lbuf.st_nlink = buf->st_nlink; 381 lbuf.st_uid = buf->st_uid; 382 lbuf.st_gid = buf->st_gid; 383 lbuf.st_rdev = buf->st_rdev; 384 lbuf.st_size = buf->st_size; 385 lbuf.st_atime = buf->st_atime; 386 lbuf.st_mtime = buf->st_mtime; 387 lbuf.st_ctime = buf->st_ctime; 388 lbuf.st_blksize = buf->st_blksize; 389 lbuf.st_blocks = buf->st_blocks; 390 391 /* 392 * The __st_ino field makes all the difference. In the Linux kernel 393 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 394 * but without the assignment to __st_ino the runtime linker refuses 395 * to mmap(2) any shared libraries. I guess it's broken alright :-) 396 */ 397 lbuf.__st_ino = buf->st_ino; 398 399 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 400 } 401 402 int 403 linux_stat64(struct thread *td, struct linux_stat64_args *args) 404 { 405 struct stat buf; 406 struct nameidata nd; 407 int error; 408 caddr_t sg; 409 410 sg = stackgap_init(); 411 CHECKALTEXIST(td, &sg, args->filename); 412 413 #ifdef DEBUG 414 if (ldebug(stat64)) 415 printf(ARGS(stat64, "%s, *"), args->filename); 416 #endif 417 418 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 419 args->filename, td); 420 error = namei(&nd); 421 if (error) 422 return (error); 423 NDFREE(&nd, NDF_ONLY_PNBUF); 424 425 error = vn_stat(nd.ni_vp, &buf, td); 426 vput(nd.ni_vp); 427 if (error) 428 return (error); 429 430 return (stat64_copyout(&buf, args->statbuf)); 431 } 432 433 int 434 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 435 { 436 int error; 437 struct stat sb; 438 struct nameidata nd; 439 caddr_t sg; 440 441 sg = stackgap_init(); 442 CHECKALTEXIST(td, &sg, args->filename); 443 444 #ifdef DEBUG 445 if (ldebug(lstat64)) 446 printf(ARGS(lstat64, "%s, *"), args->filename); 447 #endif 448 449 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 450 args->filename, td); 451 error = namei(&nd); 452 if (error) 453 return (error); 454 NDFREE(&nd, NDF_ONLY_PNBUF); 455 456 error = vn_stat(nd.ni_vp, &sb, td); 457 vput(nd.ni_vp); 458 if (error) 459 return (error); 460 461 return (stat64_copyout(&sb, args->statbuf)); 462 } 463 464 int 465 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 466 { 467 struct filedesc *fdp; 468 struct file *fp; 469 struct stat buf; 470 int error; 471 472 #ifdef DEBUG 473 if (ldebug(fstat64)) 474 printf(ARGS(fstat64, "%d, *"), args->fd); 475 #endif 476 477 fdp = td->td_proc->p_fd; 478 if ((unsigned)args->fd >= fdp->fd_nfiles || 479 (fp = fdp->fd_ofiles[args->fd]) == NULL) 480 return (EBADF); 481 482 error = fo_stat(fp, &buf, td); 483 if (!error) 484 error = stat64_copyout(&buf, args->statbuf); 485 486 return (error); 487 } 488 489 #endif /* __i386__ */ 490