[PATCH] devfs support in char/raw.c

[Alessandro Amici]

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[please cc me on reply]

Hi,

the following patch enables devfs support for the raw devices.
It is a blatant cut-and-copy from other drivers, and it passed the
basic tests I could figure out (mainly xine dvd raw access) - with and
without devfs.

Without devfs I find the raw devices under /dev on my Debian box,
but man raw(8) itself introduces the /dev/raw/ directory.
So, the proposed devices naming scheme is:

/dev/raw/rawctl
/dev/raw/raw1
...
/dev/raw/raw64

I would like to submit the patch to the maintainer, but I failed to
find who he is! (Stephen Tweedie?)

Alessandro

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--- drivers/char/raw.c-orig	Sun Sep 23 05:35:43 2001
+++ drivers/char/raw.c	Fri Dec  7 19:45:30 2001
@@ -15,6 +15,7 @@
 #include <linux/raw.h>
 #include <linux/capability.h>
 #include <linux/smp_lock.h>
+#include <linux/devfs_fs_kernel.h>
 #include <asm/uaccess.h>
 
 #define dprintk(x...) 
@@ -51,10 +52,26 @@
 static int __init raw_init(void)
 {
 	int i;
-	register_chrdev(RAW_MAJOR, "raw", &raw_fops);
+	devfs_handle_t devfs_handle;
+	char name_buf[8];
+
+	if (devfs_register_chrdev(RAW_MAJOR, "raw", &raw_fops))
+		printk("unable to get major %d for raw devs\n", RAW_MAJOR);
+
+	devfs_handle = devfs_mk_dir(NULL, "raw", NULL);
+	devfs_register (devfs_handle, "rawctl", DEVFS_FL_DEFAULT,
+			RAW_MAJOR, 0, S_IFCHR | S_IRUGO | S_IWUGO,
+			&raw_fops, NULL);
 
 	for (i = 0; i < 256; i++)
 		init_MUTEX(&raw_devices[i].mutex);
+
+	for (i = 1; i < 64; i++) {
+		sprintf(name_buf, "raw%d", i);
+		devfs_register (devfs_handle, name_buf, DEVFS_FL_DEFAULT,
+				RAW_MAJOR, i, S_IFCHR | S_IRUGO | S_IWUGO,
+				&raw_fops, NULL);
+	}
 
 	return 0;
 }

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