bfbb9ce670
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).
302 lines
8.2 KiB
C
302 lines
8.2 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 withough 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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* $Id: linux_stats.c,v 1.11 1999/05/09 10:25:30 phk Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.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/mount.h>
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#include <sys/namei.h>
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#include <sys/socketvar.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include <sys/pipe.h>
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#include <i386/linux/linux.h>
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#include <i386/linux/linux_proto.h>
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#include <i386/linux/linux_util.h>
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struct linux_newstat {
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unsigned short stat_dev;
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unsigned short __pad1;
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unsigned long stat_ino;
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unsigned short stat_mode;
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unsigned short stat_nlink;
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unsigned short stat_uid;
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unsigned short stat_gid;
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unsigned short stat_rdev;
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unsigned short __pad2;
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unsigned long stat_size;
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unsigned long stat_blksize;
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unsigned long stat_blocks;
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unsigned long stat_atime;
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unsigned long __unused1;
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unsigned long stat_mtime;
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unsigned long __unused2;
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unsigned long stat_ctime;
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unsigned long __unused3;
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unsigned long __unused4;
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unsigned long __unused5;
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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 linux_newstat tbuf;
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tbuf.stat_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 10);
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tbuf.stat_ino = buf->st_ino;
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tbuf.stat_mode = buf->st_mode;
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tbuf.stat_nlink = buf->st_nlink;
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tbuf.stat_uid = buf->st_uid;
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tbuf.stat_gid = buf->st_gid;
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tbuf.stat_rdev = buf->st_rdev;
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tbuf.stat_size = buf->st_size;
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tbuf.stat_atime = buf->st_atime;
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tbuf.stat_mtime = buf->st_mtime;
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tbuf.stat_ctime = buf->st_ctime;
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tbuf.stat_blksize = buf->st_blksize;
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tbuf.stat_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 proc *p, struct linux_newstat_args *args)
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{
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struct stat buf;
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struct nameidata nd;
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int error;
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caddr_t sg;
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sg = stackgap_init();
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CHECKALTEXIST(p, &sg, args->path);
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#ifdef DEBUG
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printf("Linux-emul(%d): newstat(%s, *)\n", p->p_pid, args->path);
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#endif
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NDINIT(&nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_USERSPACE, args->path, p);
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error = namei(&nd);
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if (!error) {
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error = vn_stat(nd.ni_vp, &buf, p);
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vput(nd.ni_vp);
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}
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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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/*
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* Get file status; this version does not follow links.
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*/
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int
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linux_newlstat(p, uap)
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struct proc *p;
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struct linux_newlstat_args *uap;
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{
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int error;
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struct vnode *vp, *dvp;
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struct stat sb, sb1;
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struct nameidata nd;
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caddr_t sg;
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sg = stackgap_init();
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CHECKALTEXIST(p, &sg, uap->path);
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#ifdef DEBUG
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printf("Linux-emul(%d): newlstat(%s, *)\n", p->p_pid, uap->path);
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#endif
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NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
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uap->path, p);
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error = namei(&nd);
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if (error)
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return (error);
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/*
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* For symbolic links, always return the attributes of its
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* containing directory, except for mode, size, and links.
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*/
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vp = nd.ni_vp;
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dvp = nd.ni_dvp;
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if (vp->v_type != VLNK) {
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if (dvp == vp)
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vrele(dvp);
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else
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vput(dvp);
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error = vn_stat(vp, &sb, p);
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vput(vp);
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if (error)
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return (error);
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} else {
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error = vn_stat(dvp, &sb, p);
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vput(dvp);
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if (error) {
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vput(vp);
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return (error);
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}
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error = vn_stat(vp, &sb1, p);
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vput(vp);
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if (error)
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return (error);
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sb.st_mode &= ~S_IFDIR;
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sb.st_mode |= S_IFLNK;
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sb.st_nlink = sb1.st_nlink;
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sb.st_size = sb1.st_size;
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sb.st_blocks = sb1.st_blocks;
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}
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error = newstat_copyout(&sb, uap->buf);
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return (error);
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}
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int
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linux_newfstat(struct proc *p, struct linux_newfstat_args *args)
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{
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struct filedesc *fdp = p->p_fd;
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struct file *fp;
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struct stat buf;
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): newfstat(%d, *)\n", p->p_pid, args->fd);
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#endif
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if ((unsigned)args->fd >= fdp->fd_nfiles
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|| (fp = fdp->fd_ofiles[args->fd]) == NULL)
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return EBADF;
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switch (fp->f_type) {
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case DTYPE_FIFO:
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case DTYPE_VNODE:
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error = vn_stat((struct vnode *)fp->f_data, &buf, p);
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break;
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case DTYPE_SOCKET:
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error = soo_stat((struct socket *)fp->f_data, &buf);
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break;
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case DTYPE_PIPE:
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error = pipe_stat((struct pipe *)fp->f_data, &buf);
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break;
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default:
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panic("LINUX newfstat");
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}
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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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struct linux_statfs_buf {
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long ftype;
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long fbsize;
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long fblocks;
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long fbfree;
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long fbavail;
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long ffiles;
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long fffree;
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linux_fsid_t ffsid;
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long fnamelen;
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long fspare[6];
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};
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int
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linux_statfs(struct proc *p, struct linux_statfs_args *args)
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{
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struct mount *mp;
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struct nameidata *ndp;
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struct statfs *bsd_statfs;
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struct nameidata nd;
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struct linux_statfs_buf linux_statfs_buf;
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int error;
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caddr_t sg;
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sg = stackgap_init();
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CHECKALTEXIST(p, &sg, args->path);
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#ifdef DEBUG
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printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path);
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#endif
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ndp = &nd;
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NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->path, curproc);
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error = namei(ndp);
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if (error)
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return error;
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mp = ndp->ni_vp->v_mount;
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bsd_statfs = &mp->mnt_stat;
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vrele(ndp->ni_vp);
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error = VFS_STATFS(mp, bsd_statfs, p);
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if (error)
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return error;
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bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
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linux_statfs_buf.ftype = bsd_statfs->f_type;
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linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
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linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
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linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
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linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
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linux_statfs_buf.fffree = bsd_statfs->f_ffree;
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linux_statfs_buf.ffiles = bsd_statfs->f_files;
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linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
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linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
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linux_statfs_buf.fnamelen = MAXNAMLEN;
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return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
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sizeof(struct linux_statfs_buf));
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}
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int
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linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args)
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{
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struct file *fp;
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struct mount *mp;
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struct statfs *bsd_statfs;
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struct linux_statfs_buf linux_statfs_buf;
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd);
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#endif
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error = getvnode(p->p_fd, args->fd, &fp);
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if (error)
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return error;
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mp = ((struct vnode *)fp->f_data)->v_mount;
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bsd_statfs = &mp->mnt_stat;
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error = VFS_STATFS(mp, bsd_statfs, p);
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if (error)
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return error;
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bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
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linux_statfs_buf.ftype = bsd_statfs->f_type;
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linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
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linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
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linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
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linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
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linux_statfs_buf.fffree = bsd_statfs->f_ffree;
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linux_statfs_buf.ffiles = bsd_statfs->f_files;
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linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
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linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
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linux_statfs_buf.fnamelen = MAXNAMLEN;
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return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
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sizeof(struct linux_statfs_buf));
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}
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