From 7e26ca1d1a4bb6507cb6f9241f2d35b1048eaecd Mon Sep 17 00:00:00 2001 From: phk Date: Tue, 11 May 1999 19:55:07 +0000 Subject: 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 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). --- sys/compat/linux/linux_stats.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'sys/compat/linux/linux_stats.c') diff --git a/sys/compat/linux/linux_stats.c b/sys/compat/linux/linux_stats.c index 8e9db81..e7f9390 100644 --- a/sys/compat/linux/linux_stats.c +++ b/sys/compat/linux/linux_stats.c @@ -25,7 +25,7 @@ * (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 1.10 1999/05/06 18:44:28 peter Exp $ + * $Id: linux_stats.c,v 1.11 1999/05/09 10:25:30 phk Exp $ */ #include @@ -74,7 +74,7 @@ newstat_copyout(struct stat *buf, void *ubuf) { struct linux_newstat tbuf; - tbuf.stat_dev = minor(buf->st_dev) | (major(buf->st_dev) << 10); + 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; -- cgit v1.1