HardenedBSD/sys/compat/linux/linux_stats.c

/*-
 * Copyright (c) 1994-1995 Søren Schmidt
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer 
 *    in this position and unchanged.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software withough specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  $Id: linux_stats.c,v 1.3 1995/06/08 13:50:52 sos Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/dirent.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/stat.h>
#include <sys/vnode.h>

#include <machine/cpu.h>
#include <machine/psl.h>
#include <machine/reg.h>

#include <i386/linux/linux.h>

struct linux_newstat {
    unsigned short stat_dev;
    unsigned short __pad1;
    unsigned long stat_ino;
    unsigned short stat_mode;
    unsigned short stat_nlink;
    unsigned short stat_uid;
    unsigned short stat_gid;
    unsigned short stat_rdev;
    unsigned short __pad2;
    unsigned long stat_size;
    unsigned long stat_blksize;
    unsigned long stat_blocks;
    unsigned long stat_atime;
    unsigned long __unused1;
    unsigned long stat_mtime;
    unsigned long __unused2;
    unsigned long stat_ctime;
    unsigned long __unused3;
    unsigned long __unused4;
    unsigned long __unused5;
};

struct linux_newstat_args {
    char *path;
    struct linux_newstat *buf;
};

static int
newstat_copyout(struct stat *buf, void *ubuf)
{
    struct linux_newstat tbuf;

    tbuf.stat_dev = (buf->st_dev & 0xff) | ((buf->st_dev & 0xff00)<<10);
    tbuf.stat_ino = buf->st_ino;
    tbuf.stat_mode = buf->st_mode;
    tbuf.stat_nlink = buf->st_nlink;
    tbuf.stat_uid = buf->st_uid;
    tbuf.stat_gid = buf->st_gid;
    tbuf.stat_rdev = buf->st_rdev;
    tbuf.stat_size = buf->st_size;
    tbuf.stat_atime = buf->st_atime;
    tbuf.stat_mtime = buf->st_mtime;
    tbuf.stat_ctime = buf->st_ctime;
    tbuf.stat_blksize = buf->st_blksize;
    tbuf.stat_blocks = buf->st_blocks;
    return copyout(&tbuf, ubuf, sizeof(tbuf));
}

int
linux_newstat(struct proc *p, struct linux_newstat_args *args, int *retval)
{
    struct stat buf;
    struct linux_newstat tbuf;
    struct nameidata nd;
    int error;
  
#ifdef DEBUG
    printf("Linux-emul(%d): newstat(%s, *)\n", p->p_pid, args->path);
#endif
    NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_USERSPACE, args->path, p);
    error = namei(&nd);
    if (!error) {
	error = vn_stat(nd.ni_vp, &buf, p);
	vput(nd.ni_vp);
    }
    if (!error) 
	error = newstat_copyout(&buf, args->buf);
    return error;
}

int
linux_newlstat(struct proc *p, struct linux_newstat_args *args, int *retval)
{
    struct stat buf;
    struct linux_newstat tbuf;
    struct nameidata nd;
    int error;
  
#ifdef DEBUG
    printf("Linux-emul(%d): newlstat(%s, *)\n", p->p_pid, args->path);
#endif
    NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_USERSPACE, args->path, p);
    error = namei(&nd);
    if (!error) {
	error = vn_stat(nd.ni_vp, &buf, p);
	vput(nd.ni_vp);
    }
    if (!error)
	error = newstat_copyout(&buf, args->buf);
    return error;
}

struct linux_newfstat_args {
    int fd;
    struct linux_newstat *buf;
};

int
linux_newfstat(struct proc *p, struct linux_newfstat_args *args, int *retval)
{
    struct linux_newstat tbuf;
    struct filedesc *fdp = p->p_fd;
    struct file *fp;
    struct stat buf;
    int error;
  
#ifdef DEBUG
    printf("Linux-emul(%d): newlstat(%d, *)\n", p->p_pid, args->fd);
#endif
    if ((unsigned)args->fd >= fdp->fd_nfiles 
	|| (fp = fdp->fd_ofiles[args->fd]) == NULL)
	return EBADF;
    switch (fp->f_type) {
    case DTYPE_VNODE:
	error = vn_stat((struct vnode *)fp->f_data, &buf, p);
	break;
    case DTYPE_SOCKET:
	error = soo_stat((struct socket *)fp->f_data, &buf);
	break;
    default:
	panic("LINUX newfstat");
    }
    if (!error)
	error = newstat_copyout(&buf, args->buf);
    return error;
}

struct linux_statfs {
	long ftype;
	long fbsize;
	long fblocks;
	long fbfree;
	long fbavail;
	long ffiles;
	long fffree;
	linux_fsid_t ffsid;
	long fnamelen;
	long fspare[6];
};


struct linux_statfs_args {
	char *path;
	struct statfs *buf;
};

int
linux_statfs(struct proc *p, struct linux_statfs_args *args, int *retval)
{
	struct mount *mp;
	struct nameidata *ndp;
	struct statfs *bsd_statfs;
	struct nameidata nd;
	struct linux_statfs linux_statfs;
	int error;

#ifdef DEBUG
	printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path);
#endif
	ndp = &nd;
  	ndp->ni_cnd.cn_nameiop = LOOKUP;
	ndp->ni_cnd.cn_flags = FOLLOW;
	ndp->ni_cnd.cn_proc = curproc;
	ndp->ni_cnd.cn_cred = curproc->p_cred->pc_ucred;
	ndp->ni_segflg = UIO_USERSPACE;
	ndp->ni_dirp = args->path;
	if (error = namei(ndp))
		return error;
	mp = ndp->ni_vp->v_mount;
	bsd_statfs = &mp->mnt_stat;
	vrele(ndp->ni_vp);
	if (error = VFS_STATFS(mp, bsd_statfs, p))
		return error;
	bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
	linux_statfs.ftype = bsd_statfs->f_type;
	linux_statfs.fbsize = bsd_statfs->f_bsize;
	linux_statfs.fblocks = bsd_statfs->f_blocks;
	linux_statfs.fbfree = bsd_statfs->f_bfree;
	linux_statfs.fbavail = bsd_statfs->f_bavail;
  	linux_statfs.fffree = bsd_statfs->f_ffree;
	linux_statfs.ffiles = bsd_statfs->f_files;
	linux_statfs.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
	linux_statfs.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
	linux_statfs.fnamelen = MAXNAMLEN;
	return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf,
		       sizeof(struct linux_statfs));
}

struct linux_fstatfs_args {
	int fd;
	struct statfs *buf;
};

int
linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args, int *retval)
{
	struct file *fp;
	struct mount *mp;
	struct statfs *bsd_statfs;
	struct linux_statfs linux_statfs;
	int error;

#ifdef DEBUG
	printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd);
#endif
	if (error = getvnode(p->p_fd, args->fd, &fp))
		return error;
	mp = ((struct vnode *)fp->f_data)->v_mount;
	bsd_statfs = &mp->mnt_stat;
	if (error = VFS_STATFS(mp, bsd_statfs, p))
		return error;
	bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
	linux_statfs.ftype = bsd_statfs->f_type;
	linux_statfs.fbsize = bsd_statfs->f_bsize;
	linux_statfs.fblocks = bsd_statfs->f_blocks;
	linux_statfs.fbfree = bsd_statfs->f_bfree;
	linux_statfs.fbavail = bsd_statfs->f_bavail;
  	linux_statfs.fffree = bsd_statfs->f_ffree;
	linux_statfs.ffiles = bsd_statfs->f_files;
	linux_statfs.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
	linux_statfs.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
	linux_statfs.fnamelen = MAXNAMLEN;
	return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf,
		       sizeof(struct linux_statfs));
}