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authorRusty Russell <rusty@rustcorp.com.au>2007-07-26 10:41:02 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-26 11:35:16 -0700
commitf938d2c892db0d80d144253d4a7b7083efdbedeb (patch)
tree1fbc946a9fb59827001a5d4d5224abe5e624e605 /drivers/lguest/lguest_user.c
parentdfb68689bf3e3d31dc9fb5c2bde5379a4ca9b0ec (diff)
lguest: documentation I: Preparation
The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/lguest/lguest_user.c')
-rw-r--r--drivers/lguest/lguest_user.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/lguest/lguest_user.c b/drivers/lguest/lguest_user.c
index e90d7a783daf..6ae86f20ce3d 100644
--- a/drivers/lguest/lguest_user.c
+++ b/drivers/lguest/lguest_user.c
@@ -1,4 +1,9 @@
-/* Userspace control of the guest, via /dev/lguest. */
+/*P:200 This contains all the /dev/lguest code, whereby the userspace launcher
+ * controls and communicates with the Guest. For example, the first write will
+ * tell us the memory size, pagetable, entry point and kernel address offset.
+ * A read will run the Guest until a signal is pending (-EINTR), or the Guest
+ * does a DMA out to the Launcher. Writes are also used to get a DMA buffer
+ * registered by the Guest and to send the Guest an interrupt. :*/
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>