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Get rid of calls to vfinddev() by doing like specfs.

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This commit is contained in:
Poul-Henning Kamp 1999-11-20 13:18:04 +00:00
parent dc4511d5eb
commit 1fe96d232a
1 changed files with 7 additions and 15 deletions
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22
sys/miscfs/devfs/devfs_vnops.c
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@ -1340,28 +1340,20 @@ devfs_open( struct vop_open_args *ap)
dsw = devsw(dev);
if ( (dsw == NULL) || (dsw->d_open == NULL))
return ENXIO;
if (ap->a_cred != FSCRED && (ap->a_mode & FWRITE)) {
if (ap->a_cred != FSCRED && (ap->a_mode & FWRITE) &&
vn_isdisk(vp)) {
/*
* When running in very secure mode, do not allow
* opens for writing of any disk character devices.
* opens for writing of any disk devices.
*/
if (securelevel >= 2
&& dsw->d_bmaj != -1
&& (dsw->d_flags & D_TYPEMASK) == D_DISK)
if (securelevel >= 2)
return (EPERM);
/*
* When running in secure mode, do not allow opens
* for writing of character
* devices whose corresponding block devices are
* currently mounted.
* for writing if the device is mounted.
*/
if (securelevel >= 1) {
if ((bdev = chrtoblk(dev)) != NODEV &&
vfinddev(bdev, VBLK, &bvp) &&
bvp->v_usecount > 0 &&
(error = vfs_mountedon(bvp)))
return (error);
}
if (securelevel >= 1 && vp->v_specmountpoint != NULL)
return (EPERM);
}
if ((dsw->d_flags & D_TYPEMASK) == D_TTY)
vp->v_flag |= VISTTY;