Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
usbmon: drop bogus 0t from usbmon.txt
The example is incorrect: there is no 0t socket (the '1t' format has no
bus number in it). Also, correct the broken sentence for USB Tag.
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
authored by
Pete Zaitcev
and committed by
Greg Kroah-Hartman
aacf4a01
7c124149
+7
-5
Documentation/usb/usbmon.txt
+7
-5
Documentation/usb/usbmon.txt
···
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Verify that bus sockets are present.
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# ls /sys/kernel/debug/usbmon
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-
0s 0t 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u
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+
0s 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u
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#
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Now you can choose to either use the sockets numbered '0' (to capture packets on
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all buses), and skip to step #3, or find the bus used by your device with step #2.
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Now you can choose to either use the socket '0u' (to capture packets on all
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buses), and skip to step #3, or find the bus used by your device with step #2.
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This allows to filter away annoying devices that talk continuously.
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2. Find which bus connects to the desired device
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···
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Here is the list of words, from left to right:
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- URB Tag. This is used to identify URBs is normally a kernel mode address
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of the URB structure in hexadecimal.
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- URB Tag. This is used to identify URBs, and is normally an in-kernel address
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of the URB structure in hexadecimal, but can be a sequence number or any
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other unique string, within reason.
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- Timestamp in microseconds, a decimal number. The timestamp's resolution
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depends on available clock, and so it can be much worse than a microsecond