On Mon, 19 Oct 2009, Alan Stern wrote:
On Sun, 18 Oct 2009, Justin Piszcz wrote:
I have performed all of the steps you recommended, there is also a bug in
the docs, the directory seems to be different, or at least if you have
everything compiled into the kernel and not using modules.
Steps from the USB documentation:
# mount -t debugfs none_debugs /sys/kernel/debug
#
The kernel documentation is outdated:
# ls /sys/kernel/debug/usbmon
0s 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u
#
The directory is:
# ls /sys/kernel/debug/usb/usbmon
0s 0u 1s 1t 1u 2s 2t 2u
This has already been corrected in the 2.6.32-rc kernels.
Great to hear, I will try the latest 2.6.31-rcX kernel!
However there is another respect in which the documentation is
outdated: It mentions /proc/bus/usb/devices. That file has moved; it
is now named /sys/kernel/debug/usb/devices. Would you like to submit a
patch fixing this?
Alan Stern
Hi,
Sure, what I meant is:
usbmon.txt states:
/sys/kernel/debug/usbmon/3u
^^^^^
Actual location:
/sys/kernel/debug/usb/usbmon/3u
^^^^^^^^^
Patch below (and attached):
diff -uprN linux-2.6.31.1/Documentation/usb/usbmon.txt linux-2.6.31.1.patch/Documentation/usb/usbmon.txt
--- linux-2.6.31.1/Documentation/usb/usbmon.txt 2009-09-24 11:45:25.000000000 -0400
+++ linux-2.6.31.1.patch/Documentation/usb/usbmon.txt 2009-10-19 10:51:06.725516874 -0400
@@ -33,7 +33,7 @@ if usbmon is built into the kernel.
Verify that bus sockets are present.
-# ls /sys/kernel/debug/usbmon
+# ls /sys/kernel/debug/usb/usbmon
0s 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u
#
@@ -58,11 +58,11 @@ Bus=03 means it's bus 3.
3. Start 'cat'
-# cat /sys/kernel/debug/usbmon/3u > /tmp/1.mon.out
+# cat /sys/kernel/debug/usb/usbmon/3u > /tmp/1.mon.out
to listen on a single bus, otherwise, to listen on all buses, type:
-# cat /sys/kernel/debug/usbmon/0u > /tmp/1.mon.out
+# cat /sys/kernel/debug/usb/usbmon/0u > /tmp/1.mon.out
This process will be reading until killed. Naturally, the output can be
redirected to a desirable location. This is preferred, because it is going
Binary files linux-2.6.31.1/Documentation/.SubmittingPatches.swp and linux-2.6.31.1.patch/Documentation/.SubmittingPatches.swp differ
diff -uprN linux-2.6.31.1/Documentation/usb/usbmon.txt linux-2.6.31.1.patch/Documentation/usb/usbmon.txt
--- linux-2.6.31.1/Documentation/usb/usbmon.txt 2009-09-24 11:45:25.000000000 -0400
+++ linux-2.6.31.1.patch/Documentation/usb/usbmon.txt 2009-10-19 10:51:06.725516874 -0400
@@ -33,7 +33,7 @@ if usbmon is built into the kernel.
Verify that bus sockets are present.
-# ls /sys/kernel/debug/usbmon
+# ls /sys/kernel/debug/usb/usbmon
0s 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u
#
@@ -58,11 +58,11 @@ Bus=03 means it's bus 3.
3. Start 'cat'
-# cat /sys/kernel/debug/usbmon/3u > /tmp/1.mon.out
+# cat /sys/kernel/debug/usb/usbmon/3u > /tmp/1.mon.out
to listen on a single bus, otherwise, to listen on all buses, type:
-# cat /sys/kernel/debug/usbmon/0u > /tmp/1.mon.out
+# cat /sys/kernel/debug/usb/usbmon/0u > /tmp/1.mon.out
This process will be reading until killed. Naturally, the output can be
redirected to a desirable location. This is preferred, because it is going
