b256a1e10b
Fixes for 'blocking in fifoor state' problem of LTP tests. linux_*stat*() functions were opening files with O_RDONLY to get major/minor pair for char/block special files. Unfortunately, when these functions are used against fifo, it is blocked forever because there is no writer. Instead, we only open char/block special files for major/minor conversion. We have to get rid of kern_open() entirely from translate_path_major_minor() but today is not the day. While I am here, add checks for errors before calling translate_path_major_minor().
586 lines
15 KiB
C
586 lines
15 KiB
C
/*-
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* Copyright (c) 1994-1995 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/dirent.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/proc.h>
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#include <sys/jail.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/stat.h>
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#include <sys/syscallsubr.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#ifdef COMPAT_LINUX32
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#include <machine/../linux32/linux.h>
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#include <machine/../linux32/linux32_proto.h>
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#else
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#include <machine/../linux/linux.h>
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#include <machine/../linux/linux_proto.h>
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#endif
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#include <compat/linux/linux_util.h>
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#include <security/mac/mac_framework.h>
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/*
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* XXX: This was removed from newstat_copyout(), and almost identical
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* XXX: code was in stat64_copyout(). findcdev() needs to be replaced
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* XXX: with something that does lookup and locking properly.
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* XXX: When somebody fixes this: please try to avoid duplicating it.
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*/
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#if 0
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static void
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disk_foo(struct somestat *tbuf)
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{
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struct cdevsw *cdevsw;
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struct cdev *dev;
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/* Lie about disk drives which are character devices
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* in FreeBSD but block devices under Linux.
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*/
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if (S_ISCHR(tbuf.st_mode) &&
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(dev = findcdev(buf->st_rdev)) != NULL) {
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cdevsw = dev_refthread(dev);
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if (cdevsw != NULL) {
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if (cdevsw->d_flags & D_DISK) {
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tbuf.st_mode &= ~S_IFMT;
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tbuf.st_mode |= S_IFBLK;
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/* XXX this may not be quite right */
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/* Map major number to 0 */
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tbuf.st_dev = uminor(buf->st_dev) & 0xf;
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tbuf.st_rdev = buf->st_rdev & 0xff;
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}
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dev_relthread(dev);
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}
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}
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}
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#endif
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static void
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translate_fd_major_minor(struct thread *td, int fd, struct stat *buf)
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{
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struct file *fp;
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int major, minor;
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if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) ||
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fget(td, fd, &fp) != 0)
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return;
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if (fp->f_vnode != NULL &&
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fp->f_vnode->v_un.vu_cdev != NULL &&
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linux_driver_get_major_minor(fp->f_vnode->v_un.vu_cdev->si_name,
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&major, &minor) == 0)
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buf->st_rdev = (major << 8 | minor);
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fdrop(fp, td);
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}
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static void
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translate_path_major_minor(struct thread *td, char *path, struct stat *buf)
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{
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struct proc *p = td->td_proc;
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struct filedesc *fdp = p->p_fd;
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struct file *fp;
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int fd;
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int temp;
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if (!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode))
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return;
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temp = td->td_retval[0];
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if (kern_open(td, path, UIO_SYSSPACE, O_RDONLY, 0) != 0)
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return;
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fd = td->td_retval[0];
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td->td_retval[0] = temp;
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translate_fd_major_minor(td, fd, buf);
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FILEDESC_LOCK(fdp);
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fp = fdp->fd_ofiles[fd];
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FILEDESC_UNLOCK(fdp);
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fdclose(fdp, fdp->fd_ofiles[fd], fd, td);
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}
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static int
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newstat_copyout(struct stat *buf, void *ubuf)
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{
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struct l_newstat tbuf;
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bzero(&tbuf, sizeof(tbuf));
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tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8);
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tbuf.st_ino = buf->st_ino;
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tbuf.st_mode = buf->st_mode;
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tbuf.st_nlink = buf->st_nlink;
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tbuf.st_uid = buf->st_uid;
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tbuf.st_gid = buf->st_gid;
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tbuf.st_rdev = buf->st_rdev;
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tbuf.st_size = buf->st_size;
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tbuf.st_atime = buf->st_atime;
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tbuf.st_mtime = buf->st_mtime;
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tbuf.st_ctime = buf->st_ctime;
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tbuf.st_blksize = buf->st_blksize;
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tbuf.st_blocks = buf->st_blocks;
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return (copyout(&tbuf, ubuf, sizeof(tbuf)));
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}
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int
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linux_newstat(struct thread *td, struct linux_newstat_args *args)
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{
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struct stat buf;
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char *path;
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int error;
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LCONVPATHEXIST(td, args->path, &path);
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#ifdef DEBUG
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if (ldebug(newstat))
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printf(ARGS(newstat, "%s, *"), path);
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#endif
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error = kern_stat(td, path, UIO_SYSSPACE, &buf);
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if (!error) {
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if (strlen(path) > strlen("/dev/pts/") &&
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!strncmp(path, "/dev/pts/", strlen("/dev/pts/")) &&
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path[9] >= '0' && path[9] <= '9') {
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/*
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* Linux checks major and minors of the slave device
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* to make sure it's a pty device, so let's make him
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* believe it is.
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*/
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buf.st_rdev = (136 << 8);
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} else
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translate_path_major_minor(td, path, &buf);
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}
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LFREEPATH(path);
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if (error)
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return (error);
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return (newstat_copyout(&buf, args->buf));
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}
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int
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linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
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{
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struct stat sb;
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char *path;
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int error;
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LCONVPATHEXIST(td, args->path, &path);
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#ifdef DEBUG
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if (ldebug(newlstat))
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printf(ARGS(newlstat, "%s, *"), path);
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#endif
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error = kern_lstat(td, path, UIO_SYSSPACE, &sb);
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if (!error)
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translate_path_major_minor(td, path, &sb);
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LFREEPATH(path);
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if (error)
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return (error);
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return (newstat_copyout(&sb, args->buf));
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}
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int
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linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
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{
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struct stat buf;
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int error;
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#ifdef DEBUG
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if (ldebug(newfstat))
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printf(ARGS(newfstat, "%d, *"), args->fd);
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#endif
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error = kern_fstat(td, args->fd, &buf);
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translate_fd_major_minor(td, args->fd, &buf);
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if (!error)
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error = newstat_copyout(&buf, args->buf);
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return (error);
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}
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static int
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stat_copyout(struct stat *buf, void *ubuf)
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{
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struct l_stat lbuf;
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bzero(&lbuf, sizeof(lbuf));
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lbuf.st_dev = buf->st_dev;
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lbuf.st_ino = buf->st_ino;
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lbuf.st_mode = buf->st_mode;
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lbuf.st_nlink = buf->st_nlink;
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lbuf.st_uid = buf->st_uid;
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lbuf.st_gid = buf->st_gid;
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lbuf.st_rdev = buf->st_rdev;
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if (buf->st_size < (quad_t)1 << 32)
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lbuf.st_size = buf->st_size;
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else
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lbuf.st_size = -2;
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lbuf.st_atime = buf->st_atime;
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lbuf.st_mtime = buf->st_mtime;
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lbuf.st_ctime = buf->st_ctime;
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lbuf.st_blksize = buf->st_blksize;
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lbuf.st_blocks = buf->st_blocks;
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lbuf.st_flags = buf->st_flags;
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lbuf.st_gen = buf->st_gen;
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return (copyout(&lbuf, ubuf, sizeof(lbuf)));
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}
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int
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linux_stat(struct thread *td, struct linux_stat_args *args)
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{
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struct stat buf;
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int error;
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#ifdef DEBUG
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if (ldebug(stat))
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printf(ARGS(stat, "%s, *"), args->path);
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#endif
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error = kern_stat(td, args->path, UIO_SYSSPACE, &buf);
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if (error)
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return (error);
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translate_path_major_minor(td, args->path, &buf);
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return(stat_copyout(&buf, args->up));
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}
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int
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linux_lstat(struct thread *td, struct linux_lstat_args *args)
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{
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struct stat buf;
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int error;
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#ifdef DEBUG
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if (ldebug(lstat))
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printf(ARGS(lstat, "%s, *"), args->path);
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#endif
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error = kern_lstat(td, args->path, UIO_SYSSPACE, &buf);
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if (error)
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return (error);
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translate_path_major_minor(td, args->path, &buf);
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return(stat_copyout(&buf, args->up));
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}
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/* XXX - All fields of type l_int are defined as l_long on i386 */
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struct l_statfs {
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l_int f_type;
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l_int f_bsize;
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l_int f_blocks;
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l_int f_bfree;
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l_int f_bavail;
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l_int f_files;
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l_int f_ffree;
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l_fsid_t f_fsid;
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l_int f_namelen;
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l_int f_spare[6];
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};
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struct l_statfs64 {
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l_int f_type;
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l_int f_bsize;
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uint64_t f_blocks;
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uint64_t f_bfree;
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uint64_t f_bavail;
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uint64_t f_files;
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uint64_t f_ffree;
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l_fsid_t f_fsid;
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l_int f_namelen;
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l_int f_spare[6];
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};
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#define LINUX_CODA_SUPER_MAGIC 0x73757245L
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#define LINUX_EXT2_SUPER_MAGIC 0xEF53L
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#define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
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#define LINUX_ISOFS_SUPER_MAGIC 0x9660L
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#define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
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#define LINUX_NCP_SUPER_MAGIC 0x564cL
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#define LINUX_NFS_SUPER_MAGIC 0x6969L
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#define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
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#define LINUX_PROC_SUPER_MAGIC 0x9fa0L
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#define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
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#define LINUX_DEVFS_SUPER_MAGIC 0x1373L
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static long
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bsd_to_linux_ftype(const char *fstypename)
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{
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int i;
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static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
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{"ufs", LINUX_UFS_SUPER_MAGIC},
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{"cd9660", LINUX_ISOFS_SUPER_MAGIC},
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{"nfs", LINUX_NFS_SUPER_MAGIC},
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{"ext2fs", LINUX_EXT2_SUPER_MAGIC},
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{"procfs", LINUX_PROC_SUPER_MAGIC},
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{"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
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{"ntfs", LINUX_NTFS_SUPER_MAGIC},
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{"nwfs", LINUX_NCP_SUPER_MAGIC},
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{"hpfs", LINUX_HPFS_SUPER_MAGIC},
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{"coda", LINUX_CODA_SUPER_MAGIC},
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{"devfs", LINUX_DEVFS_SUPER_MAGIC},
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{NULL, 0L}};
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for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
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if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
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return (b2l_tbl[i].linux_type);
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return (0L);
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}
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static void
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bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
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{
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linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
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linux_statfs->f_bsize = bsd_statfs->f_bsize;
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linux_statfs->f_blocks = bsd_statfs->f_blocks;
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linux_statfs->f_bfree = bsd_statfs->f_bfree;
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linux_statfs->f_bavail = bsd_statfs->f_bavail;
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linux_statfs->f_ffree = bsd_statfs->f_ffree;
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linux_statfs->f_files = bsd_statfs->f_files;
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linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
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linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
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linux_statfs->f_namelen = MAXNAMLEN;
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}
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int
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linux_statfs(struct thread *td, struct linux_statfs_args *args)
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{
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struct l_statfs linux_statfs;
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struct statfs bsd_statfs;
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char *path;
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int error;
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LCONVPATHEXIST(td, args->path, &path);
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#ifdef DEBUG
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if (ldebug(statfs))
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printf(ARGS(statfs, "%s, *"), path);
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#endif
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error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
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LFREEPATH(path);
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if (error)
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return (error);
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bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
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return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
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}
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static void
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bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
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{
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linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
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linux_statfs->f_bsize = bsd_statfs->f_bsize;
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linux_statfs->f_blocks = bsd_statfs->f_blocks;
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linux_statfs->f_bfree = bsd_statfs->f_bfree;
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linux_statfs->f_bavail = bsd_statfs->f_bavail;
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linux_statfs->f_ffree = bsd_statfs->f_ffree;
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linux_statfs->f_files = bsd_statfs->f_files;
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linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
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linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
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linux_statfs->f_namelen = MAXNAMLEN;
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}
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int
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linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
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{
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struct l_statfs64 linux_statfs;
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struct statfs bsd_statfs;
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char *path;
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int error;
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LCONVPATHEXIST(td, args->path, &path);
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#ifdef DEBUG
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if (ldebug(statfs64))
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printf(ARGS(statfs64, "%s, *"), path);
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#endif
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error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
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LFREEPATH(path);
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if (error)
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return (error);
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bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
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return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
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}
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int
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linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
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{
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struct l_statfs linux_statfs;
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struct statfs bsd_statfs;
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int error;
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#ifdef DEBUG
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if (ldebug(fstatfs))
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printf(ARGS(fstatfs, "%d, *"), args->fd);
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#endif
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error = kern_fstatfs(td, args->fd, &bsd_statfs);
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if (error)
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return error;
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bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
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return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
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}
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struct l_ustat
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{
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l_daddr_t f_tfree;
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l_ino_t f_tinode;
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char f_fname[6];
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char f_fpack[6];
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};
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int
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linux_ustat(struct thread *td, struct linux_ustat_args *args)
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{
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#ifdef DEBUG
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if (ldebug(ustat))
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printf(ARGS(ustat, "%d, *"), args->dev);
|
|
#endif
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
|
|
static int
|
|
stat64_copyout(struct stat *buf, void *ubuf)
|
|
{
|
|
struct l_stat64 lbuf;
|
|
|
|
bzero(&lbuf, sizeof(lbuf));
|
|
lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8);
|
|
lbuf.st_ino = buf->st_ino;
|
|
lbuf.st_mode = buf->st_mode;
|
|
lbuf.st_nlink = buf->st_nlink;
|
|
lbuf.st_uid = buf->st_uid;
|
|
lbuf.st_gid = buf->st_gid;
|
|
lbuf.st_rdev = buf->st_rdev;
|
|
lbuf.st_size = buf->st_size;
|
|
lbuf.st_atime = buf->st_atime;
|
|
lbuf.st_mtime = buf->st_mtime;
|
|
lbuf.st_ctime = buf->st_ctime;
|
|
lbuf.st_blksize = buf->st_blksize;
|
|
lbuf.st_blocks = buf->st_blocks;
|
|
|
|
/*
|
|
* The __st_ino field makes all the difference. In the Linux kernel
|
|
* it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
|
|
* but without the assignment to __st_ino the runtime linker refuses
|
|
* to mmap(2) any shared libraries. I guess it's broken alright :-)
|
|
*/
|
|
lbuf.__st_ino = buf->st_ino;
|
|
|
|
return (copyout(&lbuf, ubuf, sizeof(lbuf)));
|
|
}
|
|
|
|
int
|
|
linux_stat64(struct thread *td, struct linux_stat64_args *args)
|
|
{
|
|
struct stat buf;
|
|
char *filename;
|
|
int error;
|
|
|
|
LCONVPATHEXIST(td, args->filename, &filename);
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(stat64))
|
|
printf(ARGS(stat64, "%s, *"), filename);
|
|
#endif
|
|
|
|
error = kern_stat(td, filename, UIO_SYSSPACE, &buf);
|
|
if (!error) {
|
|
if (strlen(filename) > strlen("/dev/pts/") &&
|
|
!strncmp(filename, "/dev/pts/", strlen("/dev/pts/")) &&
|
|
filename[9] >= '0' && filename[9] <= '9') {
|
|
/*
|
|
* Linux checks major and minors of the slave device
|
|
* to make sure it's a pty deivce, so let's make him
|
|
* believe it is.
|
|
*/
|
|
buf.st_rdev = (136 << 8);
|
|
} else
|
|
translate_path_major_minor(td, filename, &buf);
|
|
}
|
|
LFREEPATH(filename);
|
|
if (error)
|
|
return (error);
|
|
return (stat64_copyout(&buf, args->statbuf));
|
|
}
|
|
|
|
int
|
|
linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
|
|
{
|
|
struct stat sb;
|
|
char *filename;
|
|
int error;
|
|
|
|
LCONVPATHEXIST(td, args->filename, &filename);
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(lstat64))
|
|
printf(ARGS(lstat64, "%s, *"), args->filename);
|
|
#endif
|
|
|
|
error = kern_lstat(td, filename, UIO_SYSSPACE, &sb);
|
|
if (!error)
|
|
translate_path_major_minor(td, filename, &sb);
|
|
LFREEPATH(filename);
|
|
if (error)
|
|
return (error);
|
|
return (stat64_copyout(&sb, args->statbuf));
|
|
}
|
|
|
|
int
|
|
linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
|
|
{
|
|
struct stat buf;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(fstat64))
|
|
printf(ARGS(fstat64, "%d, *"), args->fd);
|
|
#endif
|
|
|
|
error = kern_fstat(td, args->fd, &buf);
|
|
translate_fd_major_minor(td, args->fd, &buf);
|
|
if (!error)
|
|
error = stat64_copyout(&buf, args->statbuf);
|
|
|
|
return (error);
|
|
}
|
|
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|