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Signed-off-by: Roman Mashak <mrv@mojatatu.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
75 lines
2.0 KiB
Groff
75 lines
2.0 KiB
Groff
.TH "SKB editing action in tc" 8 "12 Jan 2015" "iproute2" "Linux"
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.SH NAME
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skbedit - SKB editing action
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.SH SYNOPSIS
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.in +8
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.ti -8
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.BR tc " ... " "action skbedit " [ " queue_mapping
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.IR QUEUE_MAPPING " ] ["
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.B priority
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.IR PRIORITY " ] ["
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.BI mark " MARK\fR[\fB/\fIMASK] ] ["
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.B ptype
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.IR PTYPE " ] ["
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.BR inheritdsfield " ]"
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.SH DESCRIPTION
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The
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.B skbedit
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action allows to change a packet's associated meta data. It complements the
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.B pedit
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action, which in turn allows to change parts of the packet data itself.
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The most unique feature of
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.B skbedit
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is its ability to decide over which queue of an interface with multiple
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transmit queues the packet is to be sent out. The number of available transmit
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queues is reflected by sysfs entries within
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.I /sys/class/net/<interface>/queues
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with name
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.I tx-N
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(where
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.I N
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is the actual queue number).
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.SH OPTIONS
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.TP
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.BI queue_mapping " QUEUE_MAPPING"
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Override the packet's transmit queue. Useful when applied to packets transmitted
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over MQ-capable network interfaces.
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.I QUEUE_MAPPING
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is an unsigned 16bit value in decimal format.
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.TP
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.BI priority " PRIORITY"
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Override the packet classification decision.
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.I PRIORITY
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is either
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.BR root ", " none
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or a hexadecimal major class ID optionally followed by a colon
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.RB ( : )
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and a hexadecimal minor class ID.
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.TP
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.BI mark " MARK\fR[\fB/\fIMASK]"
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Change the packet's firewall mark value.
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.I MARK
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is an unsigned 32bit value in automatically detected format (i.e., prefix with
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.RB ' 0x '
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for hexadecimal interpretation, etc.).
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.I MASK
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defines the 32-bit mask selecting bits of mark value. Default is 0xffffffff.
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.TP
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.BI ptype " PTYPE"
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Override the packet's type. Useful for setting packet type to host when
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needing to allow ingressing packets with the wrong MAC address but
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correct IP address.
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.I PTYPE
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is one of: host, otherhost, broadcast, multicast
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.TP
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.BI inheritdsfield
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Override the packet classification decision, and any value specified with
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.BR priority ", "
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using the information stored in the Differentiated Services Field of the
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IPv6/IPv4 header (RFC2474).
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.SH SEE ALSO
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.BR tc (8),
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.BR tc-pedit (8)
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