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freebsd-skq/sys/i386/linux/linux_stats.c
phk 7e26ca1d1a Divorce "dev_t" from the "major|minor" bitmap, which is now called 
udev_t in the kernel but still called dev_t in userland.

Provide functions to manipulate both types:
        major()         umajor()
        minor()         uminor()
        makedev()       umakedev()
        dev2udev()      udev2dev()

For now they're functions, they will become in-line functions
after one of the next two steps in this process.

Return major/minor/makedev to macro-hood for userland.

Register a name in cdevsw[] for the "filedescriptor" driver.

In the kernel the udev_t appears in places where we have the
major/minor number combination, (ie: a potential device: we
may not have the driver nor the device), like in inodes, vattr,
cdevsw registration and so on, whereas the dev_t appears where
we carry around a reference to a actual device.

In the future the cdevsw and the aliased-from vnode will be hung
directly from the dev_t, along with up to two softc pointers for
the device driver and a few houskeeping bits.  This will essentially
replace the current "alias" check code (same buck, bigger bang).

A little stunt has been provided to try to catch places where the
wrong type is being used (dev_t vs udev_t), if you see something
not working, #undef DEVT_FASCIST in kern/kern_conf.c and see if
it makes a difference.  If it does, please try to track it down
(many hands make light work) or at least try to reproduce it
as simply as possible, and describe how to do that.

Without DEVT_FASCIST I belive this patch is a no-op.

Stylistic/posixoid comments about the userland view of the <sys/*.h>
files welcome now, from userland they now contain the end result.

Next planned step: make all dev_t's refer to the same devsw[] which
means convert BLK's to CHR's at the perimeter of the vnodes and
other places where they enter the game (bootdev, mknod, sysctl).
1999-05-11 19:55:07 +00:00

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/*-
* 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 1.11 1999/05/09 10:25:30 phk 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/socketvar.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/pipe.h>
#include <i386/linux/linux.h>
#include <i386/linux/linux_proto.h>
#include <i386/linux/linux_util.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;
};
static int
newstat_copyout(struct stat *buf, void *ubuf)
{
struct linux_newstat tbuf;
tbuf.stat_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 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)
{
struct stat buf;
struct nameidata nd;
int error;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, args->path);
#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;
}
/*
* Get file status; this version does not follow links.
*/
int
linux_newlstat(p, uap)
struct proc *p;
struct linux_newlstat_args *uap;
{
int error;
struct vnode *vp, *dvp;
struct stat sb, sb1;
struct nameidata nd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, uap->path);
#ifdef DEBUG
printf("Linux-emul(%d): newlstat(%s, *)\n", p->p_pid, uap->path);
#endif
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
uap->path, p);
error = namei(&nd);
if (error)
return (error);
/*
* For symbolic links, always return the attributes of its
* containing directory, except for mode, size, and links.
*/
vp = nd.ni_vp;
dvp = nd.ni_dvp;
if (vp->v_type != VLNK) {
if (dvp == vp)
vrele(dvp);
else
vput(dvp);
error = vn_stat(vp, &sb, p);
vput(vp);
if (error)
return (error);
} else {
error = vn_stat(dvp, &sb, p);
vput(dvp);
if (error) {
vput(vp);
return (error);
}
error = vn_stat(vp, &sb1, p);
vput(vp);
if (error)
return (error);
sb.st_mode &= ~S_IFDIR;
sb.st_mode |= S_IFLNK;
sb.st_nlink = sb1.st_nlink;
sb.st_size = sb1.st_size;
sb.st_blocks = sb1.st_blocks;
}
error = newstat_copyout(&sb, uap->buf);
return (error);
}
int
linux_newfstat(struct proc *p, struct linux_newfstat_args *args)
{
struct filedesc *fdp = p->p_fd;
struct file *fp;
struct stat buf;
int error;
#ifdef DEBUG
printf("Linux-emul(%d): newfstat(%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_FIFO:
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;
case DTYPE_PIPE:
error = pipe_stat((struct pipe *)fp->f_data, &buf);
break;
default:
panic("LINUX newfstat");
}
if (!error)
error = newstat_copyout(&buf, args->buf);
return error;
}
struct linux_statfs_buf {
long ftype;
long fbsize;
long fblocks;
long fbfree;
long fbavail;
long ffiles;
long fffree;
linux_fsid_t ffsid;
long fnamelen;
long fspare[6];
};
int
linux_statfs(struct proc *p, struct linux_statfs_args *args)
{
struct mount *mp;
struct nameidata *ndp;
struct statfs *bsd_statfs;
struct nameidata nd;
struct linux_statfs_buf linux_statfs_buf;
int error;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, args->path);
#ifdef DEBUG
printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path);
#endif
ndp = &nd;
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->path, curproc);
error = namei(ndp);
if (error)
return error;
mp = ndp->ni_vp->v_mount;
bsd_statfs = &mp->mnt_stat;
vrele(ndp->ni_vp);
error = VFS_STATFS(mp, bsd_statfs, p);
if (error)
return error;
bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
linux_statfs_buf.ftype = bsd_statfs->f_type;
linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
linux_statfs_buf.fffree = bsd_statfs->f_ffree;
linux_statfs_buf.ffiles = bsd_statfs->f_files;
linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
linux_statfs_buf.fnamelen = MAXNAMLEN;
return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
sizeof(struct linux_statfs_buf));
}
int
linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args)
{
struct file *fp;
struct mount *mp;
struct statfs *bsd_statfs;
struct linux_statfs_buf linux_statfs_buf;
int error;
#ifdef DEBUG
printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd);
#endif
error = getvnode(p->p_fd, args->fd, &fp);
if (error)
return error;
mp = ((struct vnode *)fp->f_data)->v_mount;
bsd_statfs = &mp->mnt_stat;
error = VFS_STATFS(mp, bsd_statfs, p);
if (error)
return error;
bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
linux_statfs_buf.ftype = bsd_statfs->f_type;
linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
linux_statfs_buf.fffree = bsd_statfs->f_ffree;
linux_statfs_buf.ffiles = bsd_statfs->f_files;
linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
linux_statfs_buf.fnamelen = MAXNAMLEN;
return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
sizeof(struct linux_statfs_buf));
}
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