| 1 | /* $NetBSD: vfs_syscalls_43.c,v 1.58 2016/08/20 00:34:42 mrg Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1989, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * (c) UNIX System Laboratories, Inc. |
| 7 | * All or some portions of this file are derived from material licensed |
| 8 | * to the University of California by American Telephone and Telegraph |
| 9 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 10 | * the permission of UNIX System Laboratories, Inc. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * 3. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94 |
| 37 | */ |
| 38 | |
| 39 | #include <sys/cdefs.h> |
| 40 | __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_43.c,v 1.58 2016/08/20 00:34:42 mrg Exp $" ); |
| 41 | |
| 42 | #if defined(_KERNEL_OPT) |
| 43 | #include "opt_compat_netbsd.h" |
| 44 | #endif |
| 45 | |
| 46 | #include <sys/param.h> |
| 47 | #include <sys/systm.h> |
| 48 | #include <sys/filedesc.h> |
| 49 | #include <sys/kernel.h> |
| 50 | #include <sys/proc.h> |
| 51 | #include <sys/file.h> |
| 52 | #include <sys/vnode.h> |
| 53 | #include <sys/namei.h> |
| 54 | #include <sys/dirent.h> |
| 55 | #include <sys/socket.h> |
| 56 | #include <sys/socketvar.h> |
| 57 | #include <sys/stat.h> |
| 58 | #include <sys/malloc.h> |
| 59 | #include <sys/ioctl.h> |
| 60 | #include <sys/fcntl.h> |
| 61 | #include <sys/sysctl.h> |
| 62 | #include <sys/syslog.h> |
| 63 | #include <sys/unistd.h> |
| 64 | #include <sys/resourcevar.h> |
| 65 | #include <sys/sysctl.h> |
| 66 | |
| 67 | #include <sys/mount.h> |
| 68 | #include <sys/syscallargs.h> |
| 69 | #include <sys/vfs_syscalls.h> |
| 70 | |
| 71 | #include <compat/sys/stat.h> |
| 72 | #include <compat/sys/mount.h> |
| 73 | #include <compat/sys/dirent.h> |
| 74 | |
| 75 | #include <compat/common/compat_util.h> |
| 76 | #include <compat/common/compat_mod.h> |
| 77 | |
| 78 | static void cvttimespec(struct timespec *, struct timespec50 *); |
| 79 | static void cvtstat(struct stat *, struct stat43 *); |
| 80 | |
| 81 | /* |
| 82 | * Convert from an old to a new timespec structure. |
| 83 | */ |
| 84 | static void |
| 85 | cvttimespec(struct timespec *ts, struct timespec50 *ots) |
| 86 | { |
| 87 | |
| 88 | if (ts->tv_sec > INT_MAX) { |
| 89 | #if defined(DEBUG) || 1 |
| 90 | static bool first = true; |
| 91 | |
| 92 | if (first) { |
| 93 | first = false; |
| 94 | printf("%s[%s:%d]: time_t does not fit\n" , |
| 95 | __func__, curlwp->l_proc->p_comm, |
| 96 | curlwp->l_lid); |
| 97 | } |
| 98 | #endif |
| 99 | ots->tv_sec = INT_MAX; |
| 100 | } else |
| 101 | ots->tv_sec = ts->tv_sec; |
| 102 | ots->tv_nsec = ts->tv_nsec; |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * Convert from an old to a new stat structure. |
| 107 | */ |
| 108 | static void |
| 109 | cvtstat(struct stat *st, struct stat43 *ost) |
| 110 | { |
| 111 | |
| 112 | /* Handle any padding. */ |
| 113 | memset(ost, 0, sizeof *ost); |
| 114 | ost->st_dev = st->st_dev; |
| 115 | ost->st_ino = st->st_ino; |
| 116 | ost->st_mode = st->st_mode & 0xffff; |
| 117 | ost->st_nlink = st->st_nlink; |
| 118 | ost->st_uid = st->st_uid; |
| 119 | ost->st_gid = st->st_gid; |
| 120 | ost->st_rdev = st->st_rdev; |
| 121 | if (st->st_size < (quad_t)1 << 32) |
| 122 | ost->st_size = st->st_size; |
| 123 | else |
| 124 | ost->st_size = -2; |
| 125 | cvttimespec(&st->st_atimespec, &ost->st_atimespec); |
| 126 | cvttimespec(&st->st_mtimespec, &ost->st_mtimespec); |
| 127 | cvttimespec(&st->st_ctimespec, &ost->st_ctimespec); |
| 128 | ost->st_blksize = st->st_blksize; |
| 129 | ost->st_blocks = st->st_blocks; |
| 130 | ost->st_flags = st->st_flags; |
| 131 | ost->st_gen = st->st_gen; |
| 132 | } |
| 133 | |
| 134 | /* |
| 135 | * Get file status; this version follows links. |
| 136 | */ |
| 137 | /* ARGSUSED */ |
| 138 | int |
| 139 | compat_43_sys_stat(struct lwp *l, const struct compat_43_sys_stat_args *uap, register_t *retval) |
| 140 | { |
| 141 | /* { |
| 142 | syscallarg(char *) path; |
| 143 | syscallarg(struct stat43 *) ub; |
| 144 | } */ |
| 145 | struct stat sb; |
| 146 | struct stat43 osb; |
| 147 | int error; |
| 148 | |
| 149 | error = do_sys_stat(SCARG(uap, path), FOLLOW, &sb); |
| 150 | if (error) |
| 151 | return (error); |
| 152 | cvtstat(&sb, &osb); |
| 153 | error = copyout((void *)&osb, (void *)SCARG(uap, ub), sizeof (osb)); |
| 154 | return (error); |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * Get file status; this version does not follow links. |
| 159 | */ |
| 160 | /* ARGSUSED */ |
| 161 | int |
| 162 | compat_43_sys_lstat(struct lwp *l, const struct compat_43_sys_lstat_args *uap, register_t *retval) |
| 163 | { |
| 164 | /* { |
| 165 | syscallarg(char *) path; |
| 166 | syscallarg(struct ostat *) ub; |
| 167 | } */ |
| 168 | struct vnode *vp, *dvp; |
| 169 | struct stat sb, sb1; |
| 170 | struct stat43 osb; |
| 171 | int error; |
| 172 | struct pathbuf *pb; |
| 173 | struct nameidata nd; |
| 174 | int ndflags; |
| 175 | |
| 176 | error = pathbuf_copyin(SCARG(uap, path), &pb); |
| 177 | if (error) { |
| 178 | return error; |
| 179 | } |
| 180 | |
| 181 | ndflags = NOFOLLOW | LOCKLEAF | LOCKPARENT | TRYEMULROOT; |
| 182 | again: |
| 183 | NDINIT(&nd, LOOKUP, ndflags, pb); |
| 184 | if ((error = namei(&nd))) { |
| 185 | if (error == EISDIR && (ndflags & LOCKPARENT) != 0) { |
| 186 | /* |
| 187 | * Should only happen on '/'. Retry without LOCKPARENT; |
| 188 | * this is safe since the vnode won't be a VLNK. |
| 189 | */ |
| 190 | ndflags &= ~LOCKPARENT; |
| 191 | goto again; |
| 192 | } |
| 193 | pathbuf_destroy(pb); |
| 194 | return (error); |
| 195 | } |
| 196 | /* |
| 197 | * For symbolic links, always return the attributes of its |
| 198 | * containing directory, except for mode, size, and links. |
| 199 | */ |
| 200 | vp = nd.ni_vp; |
| 201 | dvp = nd.ni_dvp; |
| 202 | pathbuf_destroy(pb); |
| 203 | if (vp->v_type != VLNK) { |
| 204 | if ((ndflags & LOCKPARENT) != 0) { |
| 205 | if (dvp == vp) |
| 206 | vrele(dvp); |
| 207 | else |
| 208 | vput(dvp); |
| 209 | } |
| 210 | error = vn_stat(vp, &sb); |
| 211 | vput(vp); |
| 212 | if (error) |
| 213 | return (error); |
| 214 | } else { |
| 215 | error = vn_stat(dvp, &sb); |
| 216 | vput(dvp); |
| 217 | if (error) { |
| 218 | vput(vp); |
| 219 | return (error); |
| 220 | } |
| 221 | error = vn_stat(vp, &sb1); |
| 222 | vput(vp); |
| 223 | if (error) |
| 224 | return (error); |
| 225 | sb.st_mode &= ~S_IFDIR; |
| 226 | sb.st_mode |= S_IFLNK; |
| 227 | sb.st_nlink = sb1.st_nlink; |
| 228 | sb.st_size = sb1.st_size; |
| 229 | sb.st_blocks = sb1.st_blocks; |
| 230 | } |
| 231 | cvtstat(&sb, &osb); |
| 232 | error = copyout((void *)&osb, (void *)SCARG(uap, ub), sizeof (osb)); |
| 233 | return (error); |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * Return status information about a file descriptor. |
| 238 | */ |
| 239 | /* ARGSUSED */ |
| 240 | int |
| 241 | compat_43_sys_fstat(struct lwp *l, const struct compat_43_sys_fstat_args *uap, register_t *retval) |
| 242 | { |
| 243 | /* { |
| 244 | syscallarg(int) fd; |
| 245 | syscallarg(struct stat43 *) sb; |
| 246 | } */ |
| 247 | struct stat ub; |
| 248 | struct stat43 oub; |
| 249 | int error; |
| 250 | |
| 251 | error = do_sys_fstat(SCARG(uap, fd), &ub); |
| 252 | if (error == 0) { |
| 253 | cvtstat(&ub, &oub); |
| 254 | error = copyout((void *)&oub, (void *)SCARG(uap, sb), |
| 255 | sizeof (oub)); |
| 256 | } |
| 257 | |
| 258 | return (error); |
| 259 | } |
| 260 | |
| 261 | |
| 262 | /* |
| 263 | * Truncate a file given a file descriptor. |
| 264 | */ |
| 265 | /* ARGSUSED */ |
| 266 | int |
| 267 | compat_43_sys_ftruncate(struct lwp *l, const struct compat_43_sys_ftruncate_args *uap, register_t *retval) |
| 268 | { |
| 269 | /* { |
| 270 | syscallarg(int) fd; |
| 271 | syscallarg(long) length; |
| 272 | } */ |
| 273 | struct sys_ftruncate_args /* { |
| 274 | syscallarg(int) fd; |
| 275 | syscallarg(int) pad; |
| 276 | syscallarg(off_t) length; |
| 277 | } */ nuap; |
| 278 | |
| 279 | SCARG(&nuap, fd) = SCARG(uap, fd); |
| 280 | SCARG(&nuap, length) = SCARG(uap, length); |
| 281 | return (sys_ftruncate(l, &nuap, retval)); |
| 282 | } |
| 283 | |
| 284 | /* |
| 285 | * Truncate a file given its path name. |
| 286 | */ |
| 287 | /* ARGSUSED */ |
| 288 | int |
| 289 | compat_43_sys_truncate(struct lwp *l, const struct compat_43_sys_truncate_args *uap, register_t *retval) |
| 290 | { |
| 291 | /* { |
| 292 | syscallarg(char *) path; |
| 293 | syscallarg(long) length; |
| 294 | } */ |
| 295 | struct sys_truncate_args /* { |
| 296 | syscallarg(char *) path; |
| 297 | syscallarg(int) pad; |
| 298 | syscallarg(off_t) length; |
| 299 | } */ nuap; |
| 300 | |
| 301 | SCARG(&nuap, path) = SCARG(uap, path); |
| 302 | SCARG(&nuap, length) = SCARG(uap, length); |
| 303 | return (sys_truncate(l, &nuap, retval)); |
| 304 | } |
| 305 | |
| 306 | |
| 307 | /* |
| 308 | * Reposition read/write file offset. |
| 309 | */ |
| 310 | int |
| 311 | compat_43_sys_lseek(struct lwp *l, const struct compat_43_sys_lseek_args *uap, register_t *retval) |
| 312 | { |
| 313 | /* { |
| 314 | syscallarg(int) fd; |
| 315 | syscallarg(long) offset; |
| 316 | syscallarg(int) whence; |
| 317 | } */ |
| 318 | struct sys_lseek_args /* { |
| 319 | syscallarg(int) fd; |
| 320 | syscallarg(int) pad; |
| 321 | syscallarg(off_t) offset; |
| 322 | syscallarg(int) whence; |
| 323 | } */ nuap; |
| 324 | off_t qret; |
| 325 | int error; |
| 326 | |
| 327 | SCARG(&nuap, fd) = SCARG(uap, fd); |
| 328 | SCARG(&nuap, offset) = SCARG(uap, offset); |
| 329 | SCARG(&nuap, whence) = SCARG(uap, whence); |
| 330 | error = sys_lseek(l, &nuap, (register_t *)&qret); |
| 331 | *(long *)retval = qret; |
| 332 | return (error); |
| 333 | } |
| 334 | |
| 335 | |
| 336 | /* |
| 337 | * Create a file. |
| 338 | */ |
| 339 | int |
| 340 | compat_43_sys_creat(struct lwp *l, const struct compat_43_sys_creat_args *uap, register_t *retval) |
| 341 | { |
| 342 | /* { |
| 343 | syscallarg(char *) path; |
| 344 | syscallarg(int) mode; |
| 345 | } */ |
| 346 | struct sys_open_args /* { |
| 347 | syscallarg(char *) path; |
| 348 | syscallarg(int) flags; |
| 349 | syscallarg(int) mode; |
| 350 | } */ nuap; |
| 351 | |
| 352 | SCARG(&nuap, path) = SCARG(uap, path); |
| 353 | SCARG(&nuap, mode) = SCARG(uap, mode); |
| 354 | SCARG(&nuap, flags) = O_WRONLY | O_CREAT | O_TRUNC; |
| 355 | return (sys_open(l, &nuap, retval)); |
| 356 | } |
| 357 | |
| 358 | /*ARGSUSED*/ |
| 359 | int |
| 360 | compat_43_sys_quota(struct lwp *l, const void *v, register_t *retval) |
| 361 | { |
| 362 | |
| 363 | return (ENOSYS); |
| 364 | } |
| 365 | |
| 366 | |
| 367 | /* |
| 368 | * Read a block of directory entries in a file system independent format. |
| 369 | */ |
| 370 | int |
| 371 | compat_43_sys_getdirentries(struct lwp *l, const struct compat_43_sys_getdirentries_args *uap, register_t *retval) |
| 372 | { |
| 373 | /* { |
| 374 | syscallarg(int) fd; |
| 375 | syscallarg(char *) buf; |
| 376 | syscallarg(u_int) count; |
| 377 | syscallarg(long *) basep; |
| 378 | } */ |
| 379 | struct dirent *bdp; |
| 380 | struct vnode *vp; |
| 381 | void *tbuf; /* Current-format */ |
| 382 | char *inp; /* Current-format */ |
| 383 | int len, reclen; /* Current-format */ |
| 384 | char *outp; /* Dirent12-format */ |
| 385 | int resid, old_reclen = 0; /* Dirent12-format */ |
| 386 | struct file *fp; |
| 387 | struct uio auio; |
| 388 | struct iovec aiov; |
| 389 | struct dirent43 idb; |
| 390 | off_t off; /* true file offset */ |
| 391 | int buflen, error, eofflag, nbytes; |
| 392 | struct vattr va; |
| 393 | off_t *cookiebuf = NULL, *cookie; |
| 394 | int ncookies; |
| 395 | long loff; |
| 396 | |
| 397 | /* fd_getvnode() will use the descriptor for us */ |
| 398 | if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) |
| 399 | return (error); |
| 400 | |
| 401 | if ((fp->f_flag & FREAD) == 0) { |
| 402 | error = EBADF; |
| 403 | goto out1; |
| 404 | } |
| 405 | |
| 406 | vp = fp->f_vnode; |
| 407 | if (vp->v_type != VDIR) { |
| 408 | error = ENOTDIR; |
| 409 | goto out1; |
| 410 | } |
| 411 | |
| 412 | vn_lock(vp, LK_SHARED | LK_RETRY); |
| 413 | error = VOP_GETATTR(vp, &va, l->l_cred); |
| 414 | VOP_UNLOCK(vp); |
| 415 | if (error) |
| 416 | goto out1; |
| 417 | |
| 418 | loff = fp->f_offset; |
| 419 | nbytes = SCARG(uap, count); |
| 420 | buflen = min(MAXBSIZE, nbytes); |
| 421 | if (buflen < va.va_blocksize) |
| 422 | buflen = va.va_blocksize; |
| 423 | tbuf = malloc(buflen, M_TEMP, M_WAITOK); |
| 424 | |
| 425 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 426 | off = fp->f_offset; |
| 427 | again: |
| 428 | aiov.iov_base = tbuf; |
| 429 | aiov.iov_len = buflen; |
| 430 | auio.uio_iov = &aiov; |
| 431 | auio.uio_iovcnt = 1; |
| 432 | auio.uio_rw = UIO_READ; |
| 433 | auio.uio_resid = buflen; |
| 434 | auio.uio_offset = off; |
| 435 | UIO_SETUP_SYSSPACE(&auio); |
| 436 | /* |
| 437 | * First we read into the malloc'ed buffer, then |
| 438 | * we massage it into user space, one record at a time. |
| 439 | */ |
| 440 | error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, |
| 441 | &ncookies); |
| 442 | if (error) |
| 443 | goto out; |
| 444 | |
| 445 | inp = (char *)tbuf; |
| 446 | outp = SCARG(uap, buf); |
| 447 | resid = nbytes; |
| 448 | if ((len = buflen - auio.uio_resid) == 0) |
| 449 | goto eof; |
| 450 | |
| 451 | for (cookie = cookiebuf; len > 0; len -= reclen) { |
| 452 | bdp = (struct dirent *)inp; |
| 453 | reclen = bdp->d_reclen; |
| 454 | if (reclen & 3) |
| 455 | panic(__func__); |
| 456 | if (bdp->d_fileno == 0) { |
| 457 | inp += reclen; /* it is a hole; squish it out */ |
| 458 | if (cookie) |
| 459 | off = *cookie++; |
| 460 | else |
| 461 | off += reclen; |
| 462 | continue; |
| 463 | } |
| 464 | old_reclen = _DIRENT_RECLEN(&idb, bdp->d_namlen); |
| 465 | if (reclen > len || resid < old_reclen) { |
| 466 | /* entry too big for buffer, so just stop */ |
| 467 | outp++; |
| 468 | break; |
| 469 | } |
| 470 | /* |
| 471 | * Massage in place to make a Dirent12-shaped dirent (otherwise |
| 472 | * we have to worry about touching user memory outside of |
| 473 | * the copyout() call). |
| 474 | */ |
| 475 | idb.d_fileno = (uint32_t)bdp->d_fileno; |
| 476 | idb.d_reclen = (uint16_t)old_reclen; |
| 477 | idb.d_namlen = (uint16_t)bdp->d_namlen; |
| 478 | strcpy(idb.d_name, bdp->d_name); |
| 479 | if ((error = copyout(&idb, outp, old_reclen))) |
| 480 | goto out; |
| 481 | /* advance past this real entry */ |
| 482 | inp += reclen; |
| 483 | if (cookie) |
| 484 | off = *cookie++; /* each entry points to itself */ |
| 485 | else |
| 486 | off += reclen; |
| 487 | /* advance output past Dirent12-shaped entry */ |
| 488 | outp += old_reclen; |
| 489 | resid -= old_reclen; |
| 490 | } |
| 491 | |
| 492 | /* if we squished out the whole block, try again */ |
| 493 | if (outp == SCARG(uap, buf)) { |
| 494 | if (cookiebuf) |
| 495 | free(cookiebuf, M_TEMP); |
| 496 | cookiebuf = NULL; |
| 497 | goto again; |
| 498 | } |
| 499 | fp->f_offset = off; /* update the vnode offset */ |
| 500 | |
| 501 | eof: |
| 502 | *retval = nbytes - resid; |
| 503 | out: |
| 504 | VOP_UNLOCK(vp); |
| 505 | if (cookiebuf) |
| 506 | free(cookiebuf, M_TEMP); |
| 507 | free(tbuf, M_TEMP); |
| 508 | out1: |
| 509 | fd_putfile(SCARG(uap, fd)); |
| 510 | if (error) |
| 511 | return error; |
| 512 | return copyout(&loff, SCARG(uap, basep), sizeof(long)); |
| 513 | } |
| 514 | |
| 515 | /* |
| 516 | * sysctl helper routine for vfs.generic.conf lookups. |
| 517 | */ |
| 518 | #if defined(COMPAT_09) || defined(COMPAT_43) || defined(COMPAT_44) |
| 519 | |
| 520 | static int |
| 521 | sysctl_vfs_generic_conf(SYSCTLFN_ARGS) |
| 522 | { |
| 523 | struct vfsconf vfc; |
| 524 | extern const char * const mountcompatnames[]; |
| 525 | extern int nmountcompatnames; |
| 526 | struct sysctlnode node; |
| 527 | struct vfsops *vfsp; |
| 528 | u_int vfsnum; |
| 529 | |
| 530 | if (namelen != 1) |
| 531 | return (ENOTDIR); |
| 532 | vfsnum = name[0]; |
| 533 | if (vfsnum >= nmountcompatnames || |
| 534 | mountcompatnames[vfsnum] == NULL) |
| 535 | return (EOPNOTSUPP); |
| 536 | vfsp = vfs_getopsbyname(mountcompatnames[vfsnum]); |
| 537 | if (vfsp == NULL) |
| 538 | return (EOPNOTSUPP); |
| 539 | |
| 540 | vfc.vfc_vfsops = vfsp; |
| 541 | strncpy(vfc.vfc_name, vfsp->vfs_name, sizeof(vfc.vfc_name)); |
| 542 | vfc.vfc_typenum = vfsnum; |
| 543 | vfc.vfc_refcount = vfsp->vfs_refcount; |
| 544 | vfc.vfc_flags = 0; |
| 545 | vfc.vfc_mountroot = vfsp->vfs_mountroot; |
| 546 | vfc.vfc_next = NULL; |
| 547 | vfs_delref(vfsp); |
| 548 | |
| 549 | node = *rnode; |
| 550 | node.sysctl_data = &vfc; |
| 551 | return (sysctl_lookup(SYSCTLFN_CALL(&node))); |
| 552 | } |
| 553 | |
| 554 | /* |
| 555 | * Top level filesystem related information gathering. |
| 556 | */ |
| 557 | void |
| 558 | compat_sysctl_vfs(struct sysctllog **clog) |
| 559 | { |
| 560 | extern int nmountcompatnames; |
| 561 | |
| 562 | sysctl_createv(clog, 0, NULL, NULL, |
| 563 | CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, |
| 564 | CTLTYPE_INT, "maxtypenum" , |
| 565 | SYSCTL_DESCR("Highest valid filesystem type number" ), |
| 566 | NULL, nmountcompatnames, NULL, 0, |
| 567 | CTL_VFS, VFS_GENERIC, VFS_MAXTYPENUM, CTL_EOL); |
| 568 | sysctl_createv(clog, 0, NULL, NULL, |
| 569 | CTLFLAG_PERMANENT, |
| 570 | CTLTYPE_STRUCT, "conf" , |
| 571 | SYSCTL_DESCR("Filesystem configuration information" ), |
| 572 | sysctl_vfs_generic_conf, 0, NULL, |
| 573 | sizeof(struct vfsconf), |
| 574 | CTL_VFS, VFS_GENERIC, VFS_CONF, CTL_EOL); |
| 575 | } |
| 576 | #endif |
| 577 | |