+++ /dev/null
---- a/include/uapi/linux/pkt_sched.h
-+++ b/include/uapi/linux/pkt_sched.h
-@@ -934,4 +934,118 @@ enum {
-
- #define TCA_CBS_MAX (__TCA_CBS_MAX - 1)
-
-+/* CAKE */
-+enum {
-+ TCA_CAKE_UNSPEC,
-+ TCA_CAKE_PAD,
-+ TCA_CAKE_BASE_RATE64,
-+ TCA_CAKE_DIFFSERV_MODE,
-+ TCA_CAKE_ATM,
-+ TCA_CAKE_FLOW_MODE,
-+ TCA_CAKE_OVERHEAD,
-+ TCA_CAKE_RTT,
-+ TCA_CAKE_TARGET,
-+ TCA_CAKE_AUTORATE,
-+ TCA_CAKE_MEMORY,
-+ TCA_CAKE_NAT,
-+ TCA_CAKE_RAW, // was _ETHERNET
-+ TCA_CAKE_WASH,
-+ TCA_CAKE_MPU,
-+ TCA_CAKE_INGRESS,
-+ TCA_CAKE_ACK_FILTER,
-+ TCA_CAKE_SPLIT_GSO,
-+ __TCA_CAKE_MAX
-+};
-+#define TCA_CAKE_MAX (__TCA_CAKE_MAX - 1)
-+
-+enum {
-+ __TCA_CAKE_STATS_INVALID,
-+ TCA_CAKE_STATS_PAD,
-+ TCA_CAKE_STATS_CAPACITY_ESTIMATE64,
-+ TCA_CAKE_STATS_MEMORY_LIMIT,
-+ TCA_CAKE_STATS_MEMORY_USED,
-+ TCA_CAKE_STATS_AVG_NETOFF,
-+ TCA_CAKE_STATS_MIN_NETLEN,
-+ TCA_CAKE_STATS_MAX_NETLEN,
-+ TCA_CAKE_STATS_MIN_ADJLEN,
-+ TCA_CAKE_STATS_MAX_ADJLEN,
-+ TCA_CAKE_STATS_TIN_STATS,
-+ TCA_CAKE_STATS_DEFICIT,
-+ TCA_CAKE_STATS_COBALT_COUNT,
-+ TCA_CAKE_STATS_DROPPING,
-+ TCA_CAKE_STATS_DROP_NEXT_US,
-+ TCA_CAKE_STATS_P_DROP,
-+ TCA_CAKE_STATS_BLUE_TIMER_US,
-+ __TCA_CAKE_STATS_MAX
-+};
-+#define TCA_CAKE_STATS_MAX (__TCA_CAKE_STATS_MAX - 1)
-+
-+enum {
-+ __TCA_CAKE_TIN_STATS_INVALID,
-+ TCA_CAKE_TIN_STATS_PAD,
-+ TCA_CAKE_TIN_STATS_SENT_PACKETS,
-+ TCA_CAKE_TIN_STATS_SENT_BYTES64,
-+ TCA_CAKE_TIN_STATS_DROPPED_PACKETS,
-+ TCA_CAKE_TIN_STATS_DROPPED_BYTES64,
-+ TCA_CAKE_TIN_STATS_ACKS_DROPPED_PACKETS,
-+ TCA_CAKE_TIN_STATS_ACKS_DROPPED_BYTES64,
-+ TCA_CAKE_TIN_STATS_ECN_MARKED_PACKETS,
-+ TCA_CAKE_TIN_STATS_ECN_MARKED_BYTES64,
-+ TCA_CAKE_TIN_STATS_BACKLOG_PACKETS,
-+ TCA_CAKE_TIN_STATS_BACKLOG_BYTES,
-+ TCA_CAKE_TIN_STATS_THRESHOLD_RATE64,
-+ TCA_CAKE_TIN_STATS_TARGET_US,
-+ TCA_CAKE_TIN_STATS_INTERVAL_US,
-+ TCA_CAKE_TIN_STATS_WAY_INDIRECT_HITS,
-+ TCA_CAKE_TIN_STATS_WAY_MISSES,
-+ TCA_CAKE_TIN_STATS_WAY_COLLISIONS,
-+ TCA_CAKE_TIN_STATS_PEAK_DELAY_US,
-+ TCA_CAKE_TIN_STATS_AVG_DELAY_US,
-+ TCA_CAKE_TIN_STATS_BASE_DELAY_US,
-+ TCA_CAKE_TIN_STATS_SPARSE_FLOWS,
-+ TCA_CAKE_TIN_STATS_BULK_FLOWS,
-+ TCA_CAKE_TIN_STATS_UNRESPONSIVE_FLOWS,
-+ TCA_CAKE_TIN_STATS_MAX_SKBLEN,
-+ TCA_CAKE_TIN_STATS_FLOW_QUANTUM,
-+ __TCA_CAKE_TIN_STATS_MAX
-+};
-+#define TCA_CAKE_TIN_STATS_MAX (__TCA_CAKE_TIN_STATS_MAX - 1)
-+#define TC_CAKE_MAX_TINS (8)
-+
-+enum {
-+ CAKE_FLOW_NONE = 0,
-+ CAKE_FLOW_SRC_IP,
-+ CAKE_FLOW_DST_IP,
-+ CAKE_FLOW_HOSTS, /* = CAKE_FLOW_SRC_IP | CAKE_FLOW_DST_IP */
-+ CAKE_FLOW_FLOWS,
-+ CAKE_FLOW_DUAL_SRC, /* = CAKE_FLOW_SRC_IP | CAKE_FLOW_FLOWS */
-+ CAKE_FLOW_DUAL_DST, /* = CAKE_FLOW_DST_IP | CAKE_FLOW_FLOWS */
-+ CAKE_FLOW_TRIPLE, /* = CAKE_FLOW_HOSTS | CAKE_FLOW_FLOWS */
-+ CAKE_FLOW_MAX,
-+};
-+
-+enum {
-+ CAKE_DIFFSERV_DIFFSERV3 = 0,
-+ CAKE_DIFFSERV_DIFFSERV4,
-+ CAKE_DIFFSERV_DIFFSERV8,
-+ CAKE_DIFFSERV_BESTEFFORT,
-+ CAKE_DIFFSERV_PRECEDENCE,
-+ CAKE_DIFFSERV_MAX
-+};
-+
-+enum {
-+ CAKE_ACK_NONE = 0,
-+ CAKE_ACK_FILTER,
-+ CAKE_ACK_AGGRESSIVE,
-+ CAKE_ACK_MAX
-+};
-+
-+enum {
-+ CAKE_ATM_NONE = 0,
-+ CAKE_ATM_ATM,
-+ CAKE_ATM_PTM,
-+ CAKE_ATM_MAX
-+};
-+
-+
- #endif
---- /dev/null
-+++ b/man/man8/tc-cake.8
-@@ -0,0 +1,710 @@
-+.TH CAKE 8 "19 July 2018" "iproute2" "Linux"
-+.SH NAME
-+CAKE \- Common Applications Kept Enhanced (CAKE)
-+.SH SYNOPSIS
-+.B tc qdisc ... cake
-+.br
-+[
-+.BR bandwidth
-+RATE |
-+.BR unlimited*
-+|
-+.BR autorate-ingress
-+]
-+.br
-+[
-+.BR rtt
-+TIME |
-+.BR datacentre
-+|
-+.BR lan
-+|
-+.BR metro
-+|
-+.BR regional
-+|
-+.BR internet*
-+|
-+.BR oceanic
-+|
-+.BR satellite
-+|
-+.BR interplanetary
-+]
-+.br
-+[
-+.BR besteffort
-+|
-+.BR diffserv8
-+|
-+.BR diffserv4
-+|
-+.BR diffserv3*
-+]
-+.br
-+[
-+.BR flowblind
-+|
-+.BR srchost
-+|
-+.BR dsthost
-+|
-+.BR hosts
-+|
-+.BR flows
-+|
-+.BR dual-srchost
-+|
-+.BR dual-dsthost
-+|
-+.BR triple-isolate*
-+]
-+.br
-+[
-+.BR nat
-+|
-+.BR nonat*
-+]
-+.br
-+[
-+.BR wash
-+|
-+.BR nowash*
-+]
-+.br
-+[
-+.BR split-gso*
-+|
-+.BR no-split-gso
-+]
-+.br
-+[
-+.BR ack-filter
-+|
-+.BR ack-filter-aggressive
-+|
-+.BR no-ack-filter*
-+]
-+.br
-+[
-+.BR memlimit
-+LIMIT ]
-+.br
-+[
-+.BR ptm
-+|
-+.BR atm
-+|
-+.BR noatm*
-+]
-+.br
-+[
-+.BR overhead
-+N |
-+.BR conservative
-+|
-+.BR raw*
-+]
-+.br
-+[
-+.BR mpu
-+N ]
-+.br
-+[
-+.BR ingress
-+|
-+.BR egress*
-+]
-+.br
-+(* marks defaults)
-+
-+
-+.SH DESCRIPTION
-+CAKE (Common Applications Kept Enhanced) is a shaping-capable queue discipline
-+which uses both AQM and FQ. It combines COBALT, which is an AQM algorithm
-+combining Codel and BLUE, a shaper which operates in deficit mode, and a variant
-+of DRR++ for flow isolation. 8-way set-associative hashing is used to virtually
-+eliminate hash collisions. Priority queuing is available through a simplified
-+diffserv implementation. Overhead compensation for various encapsulation
-+schemes is tightly integrated.
-+
-+All settings are optional; the default settings are chosen to be sensible in
-+most common deployments. Most people will only need to set the
-+.B bandwidth
-+parameter to get useful results, but reading the
-+.B Overhead Compensation
-+and
-+.B Round Trip Time
-+sections is strongly encouraged.
-+
-+.SH SHAPER PARAMETERS
-+CAKE uses a deficit-mode shaper, which does not exhibit the initial burst
-+typical of token-bucket shapers. It will automatically burst precisely as much
-+as required to maintain the configured throughput. As such, it is very
-+straightforward to configure.
-+.PP
-+.B unlimited
-+(default)
-+.br
-+ No limit on the bandwidth.
-+.PP
-+.B bandwidth
-+RATE
-+.br
-+ Set the shaper bandwidth. See
-+.BR tc(8)
-+or examples below for details of the RATE value.
-+.PP
-+.B autorate-ingress
-+.br
-+ Automatic capacity estimation based on traffic arriving at this qdisc.
-+This is most likely to be useful with cellular links, which tend to change
-+quality randomly. A
-+.B bandwidth
-+parameter can be used in conjunction to specify an initial estimate. The shaper
-+will periodically be set to a bandwidth slightly below the estimated rate. This
-+estimator cannot estimate the bandwidth of links downstream of itself.
-+
-+.SH OVERHEAD COMPENSATION PARAMETERS
-+The size of each packet on the wire may differ from that seen by Linux. The
-+following parameters allow CAKE to compensate for this difference by internally
-+considering each packet to be bigger than Linux informs it. To assist users who
-+are not expert network engineers, keywords have been provided to represent a
-+number of common link technologies.
-+
-+.SS Manual Overhead Specification
-+.B overhead
-+BYTES
-+.br
-+ Adds BYTES to the size of each packet. BYTES may be negative; values
-+between -64 and 256 (inclusive) are accepted.
-+.PP
-+.B mpu
-+BYTES
-+.br
-+ Rounds each packet (including overhead) up to a minimum length
-+BYTES. BYTES may not be negative; values between 0 and 256 (inclusive)
-+are accepted.
-+.PP
-+.B atm
-+.br
-+ Compensates for ATM cell framing, which is normally found on ADSL links.
-+This is performed after the
-+.B overhead
-+parameter above. ATM uses fixed 53-byte cells, each of which can carry 48 bytes
-+payload.
-+.PP
-+.B ptm
-+.br
-+ Compensates for PTM encoding, which is normally found on VDSL2 links and
-+uses a 64b/65b encoding scheme. It is even more efficient to simply
-+derate the specified shaper bandwidth by a factor of 64/65 or 0.984. See
-+ITU G.992.3 Annex N and IEEE 802.3 Section 61.3 for details.
-+.PP
-+.B noatm
-+.br
-+ Disables ATM and PTM compensation.
-+
-+.SS Failsafe Overhead Keywords
-+These two keywords are provided for quick-and-dirty setup. Use them if you
-+can't be bothered to read the rest of this section.
-+.PP
-+.B raw
-+(default)
-+.br
-+ Turns off all overhead compensation in CAKE. The packet size reported
-+by Linux will be used directly.
-+.PP
-+ Other overhead keywords may be added after "raw". The effect of this is
-+to make the overhead compensation operate relative to the reported packet size,
-+not the underlying IP packet size.
-+.PP
-+.B conservative
-+.br
-+ Compensates for more overhead than is likely to occur on any
-+widely-deployed link technology.
-+.br
-+ Equivalent to
-+.B overhead 48 atm.
-+
-+.SS ADSL Overhead Keywords
-+Most ADSL modems have a way to check which framing scheme is in use. Often this
-+is also specified in the settings document provided by the ISP. The keywords in
-+this section are intended to correspond with these sources of information. All
-+of them implicitly set the
-+.B atm
-+flag.
-+.PP
-+.B pppoa-vcmux
-+.br
-+ Equivalent to
-+.B overhead 10 atm
-+.PP
-+.B pppoa-llc
-+.br
-+ Equivalent to
-+.B overhead 14 atm
-+.PP
-+.B pppoe-vcmux
-+.br
-+ Equivalent to
-+.B overhead 32 atm
-+.PP
-+.B pppoe-llcsnap
-+.br
-+ Equivalent to
-+.B overhead 40 atm
-+.PP
-+.B bridged-vcmux
-+.br
-+ Equivalent to
-+.B overhead 24 atm
-+.PP
-+.B bridged-llcsnap
-+.br
-+ Equivalent to
-+.B overhead 32 atm
-+.PP
-+.B ipoa-vcmux
-+.br
-+ Equivalent to
-+.B overhead 8 atm
-+.PP
-+.B ipoa-llcsnap
-+.br
-+ Equivalent to
-+.B overhead 16 atm
-+.PP
-+See also the Ethernet Correction Factors section below.
-+
-+.SS VDSL2 Overhead Keywords
-+ATM was dropped from VDSL2 in favour of PTM, which is a much more
-+straightforward framing scheme. Some ISPs retained PPPoE for compatibility with
-+their existing back-end systems.
-+.PP
-+.B pppoe-ptm
-+.br
-+ Equivalent to
-+.B overhead 30 ptm
-+
-+.br
-+ PPPoE: 2B PPP + 6B PPPoE +
-+.br
-+ ETHERNET: 6B dest MAC + 6B src MAC + 2B ethertype + 4B Frame Check Sequence +
-+.br
-+ PTM: 1B Start of Frame (S) + 1B End of Frame (Ck) + 2B TC-CRC (PTM-FCS)
-+.br
-+.PP
-+.B bridged-ptm
-+.br
-+ Equivalent to
-+.B overhead 22 ptm
-+.br
-+ ETHERNET: 6B dest MAC + 6B src MAC + 2B ethertype + 4B Frame Check Sequence +
-+.br
-+ PTM: 1B Start of Frame (S) + 1B End of Frame (Ck) + 2B TC-CRC (PTM-FCS)
-+.br
-+.PP
-+See also the Ethernet Correction Factors section below.
-+
-+.SS DOCSIS Cable Overhead Keyword
-+DOCSIS is the universal standard for providing Internet service over cable-TV
-+infrastructure.
-+
-+In this case, the actual on-wire overhead is less important than the packet size
-+the head-end equipment uses for shaping and metering. This is specified to be
-+an Ethernet frame including the CRC (aka FCS).
-+.PP
-+.B docsis
-+.br
-+ Equivalent to
-+.B overhead 18 mpu 64 noatm
-+
-+.SS Ethernet Overhead Keywords
-+.PP
-+.B ethernet
-+.br
-+ Accounts for Ethernet's preamble, inter-frame gap, and Frame Check
-+Sequence. Use this keyword when the bottleneck being shaped for is an
-+actual Ethernet cable.
-+.br
-+ Equivalent to
-+.B overhead 38 mpu 84 noatm
-+.PP
-+.B ether-vlan
-+.br
-+ Adds 4 bytes to the overhead compensation, accounting for an IEEE 802.1Q
-+VLAN header appended to the Ethernet frame header. NB: Some ISPs use one or
-+even two of these within PPPoE; this keyword may be repeated as necessary to
-+express this.
-+
-+.SH ROUND TRIP TIME PARAMETERS
-+Active Queue Management (AQM) consists of embedding congestion signals in the
-+packet flow, which receivers use to instruct senders to slow down when the queue
-+is persistently occupied. CAKE uses ECN signalling when available, and packet
-+drops otherwise, according to a combination of the Codel and BLUE AQM algorithms
-+called COBALT.
-+
-+Very short latencies require a very rapid AQM response to adequately control
-+latency. However, such a rapid response tends to impair throughput when the
-+actual RTT is relatively long. CAKE allows specifying the RTT it assumes for
-+tuning various parameters. Actual RTTs within an order of magnitude of this
-+will generally work well for both throughput and latency management.
-+
-+At the 'lan' setting and below, the time constants are similar in magnitude to
-+the jitter in the Linux kernel itself, so congestion might be signalled
-+prematurely. The flows will then become sparse and total throughput reduced,
-+leaving little or no back-pressure for the fairness logic to work against. Use
-+the "metro" setting for local lans unless you have a custom kernel.
-+.PP
-+.B rtt
-+TIME
-+.br
-+ Manually specify an RTT.
-+.PP
-+.B datacentre
-+.br
-+ For extremely high-performance 10GigE+ networks only. Equivalent to
-+.B rtt 100us.
-+.PP
-+.B lan
-+.br
-+ For pure Ethernet (not Wi-Fi) networks, at home or in the office. Don't
-+use this when shaping for an Internet access link. Equivalent to
-+.B rtt 1ms.
-+.PP
-+.B metro
-+.br
-+ For traffic mostly within a single city. Equivalent to
-+.B rtt 10ms.
-+.PP
-+.B regional
-+.br
-+ For traffic mostly within a European-sized country. Equivalent to
-+.B rtt 30ms.
-+.PP
-+.B internet
-+(default)
-+.br
-+ This is suitable for most Internet traffic. Equivalent to
-+.B rtt 100ms.
-+.PP
-+.B oceanic
-+.br
-+ For Internet traffic with generally above-average latency, such as that
-+suffered by Australasian residents. Equivalent to
-+.B rtt 300ms.
-+.PP
-+.B satellite
-+.br
-+ For traffic via geostationary satellites. Equivalent to
-+.B rtt 1000ms.
-+.PP
-+.B interplanetary
-+.br
-+ So named because Jupiter is about 1 light-hour from Earth. Use this to
-+(almost) completely disable AQM actions. Equivalent to
-+.B rtt 3600s.
-+
-+.SH FLOW ISOLATION PARAMETERS
-+With flow isolation enabled, CAKE places packets from different flows into
-+different queues, each of which carries its own AQM state. Packets from each
-+queue are then delivered fairly, according to a DRR++ algorithm which minimises
-+latency for "sparse" flows. CAKE uses a set-associative hashing algorithm to
-+minimise flow collisions.
-+
-+These keywords specify whether fairness based on source address, destination
-+address, individual flows, or any combination of those is desired.
-+.PP
-+.B flowblind
-+.br
-+ Disables flow isolation; all traffic passes through a single queue for
-+each tin.
-+.PP
-+.B srchost
-+.br
-+ Flows are defined only by source address. Could be useful on the egress
-+path of an ISP backhaul.
-+.PP
-+.B dsthost
-+.br
-+ Flows are defined only by destination address. Could be useful on the
-+ingress path of an ISP backhaul.
-+.PP
-+.B hosts
-+.br
-+ Flows are defined by source-destination host pairs. This is host
-+isolation, rather than flow isolation.
-+.PP
-+.B flows
-+.br
-+ Flows are defined by the entire 5-tuple of source address, destination
-+address, transport protocol, source port and destination port. This is the type
-+of flow isolation performed by SFQ and fq_codel.
-+.PP
-+.B dual-srchost
-+.br
-+ Flows are defined by the 5-tuple, and fairness is applied first over
-+source addresses, then over individual flows. Good for use on egress traffic
-+from a LAN to the internet, where it'll prevent any one LAN host from
-+monopolising the uplink, regardless of the number of flows they use.
-+.PP
-+.B dual-dsthost
-+.br
-+ Flows are defined by the 5-tuple, and fairness is applied first over
-+destination addresses, then over individual flows. Good for use on ingress
-+traffic to a LAN from the internet, where it'll prevent any one LAN host from
-+monopolising the downlink, regardless of the number of flows they use.
-+.PP
-+.B triple-isolate
-+(default)
-+.br
-+ Flows are defined by the 5-tuple, and fairness is applied over source
-+*and* destination addresses intelligently (ie. not merely by host-pairs), and
-+also over individual flows. Use this if you're not certain whether to use
-+dual-srchost or dual-dsthost; it'll do both jobs at once, preventing any one
-+host on *either* side of the link from monopolising it with a large number of
-+flows.
-+.PP
-+.B nat
-+.br
-+ Instructs Cake to perform a NAT lookup before applying flow-isolation
-+rules, to determine the true addresses and port numbers of the packet, to
-+improve fairness between hosts "inside" the NAT. This has no practical effect
-+in "flowblind" or "flows" modes, or if NAT is performed on a different host.
-+.PP
-+.B nonat
-+(default)
-+.br
-+ Cake will not perform a NAT lookup. Flow isolation will be performed
-+using the addresses and port numbers directly visible to the interface Cake is
-+attached to.
-+
-+.SH PRIORITY QUEUE PARAMETERS
-+CAKE can divide traffic into "tins" based on the Diffserv field. Each tin has
-+its own independent set of flow-isolation queues, and is serviced based on a WRR
-+algorithm. To avoid perverse Diffserv marking incentives, tin weights have a
-+"priority sharing" value when bandwidth used by that tin is below a threshold,
-+and a lower "bandwidth sharing" value when above. Bandwidth is compared against
-+the threshold using the same algorithm as the deficit-mode shaper.
-+
-+Detailed customisation of tin parameters is not provided. The following presets
-+perform all necessary tuning, relative to the current shaper bandwidth and RTT
-+settings.
-+.PP
-+.B besteffort
-+.br
-+ Disables priority queuing by placing all traffic in one tin.
-+.PP
-+.B precedence
-+.br
-+ Enables legacy interpretation of TOS "Precedence" field. Use of this
-+preset on the modern Internet is firmly discouraged.
-+.PP
-+.B diffserv4
-+.br
-+ Provides a general-purpose Diffserv implementation with four tins:
-+.br
-+ Bulk (CS1), 6.25% threshold, generally low priority.
-+.br
-+ Best Effort (general), 100% threshold.
-+.br
-+ Video (AF4x, AF3x, CS3, AF2x, CS2, TOS4, TOS1), 50% threshold.
-+.br
-+ Voice (CS7, CS6, EF, VA, CS5, CS4), 25% threshold.
-+.PP
-+.B diffserv3
-+(default)
-+.br
-+ Provides a simple, general-purpose Diffserv implementation with three tins:
-+.br
-+ Bulk (CS1), 6.25% threshold, generally low priority.
-+.br
-+ Best Effort (general), 100% threshold.
-+.br
-+ Voice (CS7, CS6, EF, VA, TOS4), 25% threshold, reduced Codel interval.
-+
-+.SH OTHER PARAMETERS
-+.B memlimit
-+LIMIT
-+.br
-+ Limit the memory consumed by Cake to LIMIT bytes. Note that this does
-+not translate directly to queue size (so do not size this based on bandwidth
-+delay product considerations, but rather on worst case acceptable memory
-+consumption), as there is some overhead in the data structures containing the
-+packets, especially for small packets.
-+
-+ By default, the limit is calculated based on the bandwidth and RTT
-+settings.
-+
-+.PP
-+.B wash
-+
-+.br
-+ Traffic entering your diffserv domain is frequently mis-marked in
-+transit from the perspective of your network, and traffic exiting yours may be
-+mis-marked from the perspective of the transiting provider.
-+
-+Apply the wash option to clear all extra diffserv (but not ECN bits), after
-+priority queuing has taken place.
-+
-+If you are shaping inbound, and cannot trust the diffserv markings (as is the
-+case for Comcast Cable, among others), it is best to use a single queue
-+"besteffort" mode with wash.
-+
-+.PP
-+.B split-gso
-+
-+.br
-+ This option controls whether CAKE will split General Segmentation
-+Offload (GSO) super-packets into their on-the-wire components and
-+dequeue them individually.
-+
-+.br
-+Super-packets are created by the networking stack to improve efficiency.
-+However, because they are larger they take longer to dequeue, which
-+translates to higher latency for competing flows, especially at lower
-+bandwidths. CAKE defaults to splitting GSO packets to achieve the lowest
-+possible latency. At link speeds higher than 10 Gbps, setting the
-+no-split-gso parameter can increase the maximum achievable throughput by
-+retaining the full GSO packets.
-+
-+.SH OVERRIDING CLASSIFICATION WITH TC FILTERS
-+
-+CAKE supports overriding of its internal classification of packets through the
-+tc filter mechanism. Packets can be assigned to different priority tins by
-+setting the
-+.B priority
-+field on the skb, and the flow hashing can be overridden by setting the
-+.B classid
-+parameter.
-+
-+.PP
-+.B Tin override
-+
-+.br
-+ To assign a priority tin, the major number of the priority field needs
-+to match the qdisc handle of the cake instance; if it does, the minor number
-+will be interpreted as the tin index. For example, to classify all ICMP packets
-+as 'bulk', the following filter can be used:
-+
-+.br
-+ # tc qdisc replace dev eth0 handle 1: root cake diffserv3
-+ # tc filter add dev eth0 parent 1: protocol ip prio 1 \\
-+ u32 match icmp type 0 0 action skbedit priority 1:1
-+
-+.PP
-+.B Flow hash override
-+
-+.br
-+ To override flow hashing, the classid can be set. CAKE will interpret
-+the major number of the classid as the host hash used in host isolation mode,
-+and the minor number as the flow hash used for flow-based queueing. One or both
-+of those can be set, and will be used if the relevant flow isolation parameter
-+is set (i.e., the major number will be ignored if CAKE is not configured in
-+hosts mode, and the minor number will be ignored if CAKE is not configured in
-+flows mode).
-+
-+.br
-+This example will assign all ICMP packets to the first queue:
-+
-+.br
-+ # tc qdisc replace dev eth0 handle 1: root cake
-+ # tc filter add dev eth0 parent 1: protocol ip prio 1 \\
-+ u32 match icmp type 0 0 classid 0:1
-+
-+.br
-+If only one of the host and flow overrides is set, CAKE will compute the other
-+hash from the packet as normal. Note, however, that the host isolation mode
-+works by assigning a host ID to the flow queue; so if overriding both host and
-+flow, the same flow cannot have more than one host assigned. In addition, it is
-+not possible to assign different source and destination host IDs through the
-+override mechanism; if a host ID is assigned, it will be used as both source and
-+destination host.
-+
-+
-+
-+.SH EXAMPLES
-+# tc qdisc delete root dev eth0
-+.br
-+# tc qdisc add root dev eth0 cake bandwidth 100Mbit ethernet
-+.br
-+# tc -s qdisc show dev eth0
-+.br
-+qdisc cake 1: root refcnt 2 bandwidth 100Mbit diffserv3 triple-isolate rtt 100.0ms noatm overhead 38 mpu 84
-+ Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
-+ backlog 0b 0p requeues 0
-+ memory used: 0b of 5000000b
-+ capacity estimate: 100Mbit
-+ min/max network layer size: 65535 / 0
-+ min/max overhead-adjusted size: 65535 / 0
-+ average network hdr offset: 0
-+
-+ Bulk Best Effort Voice
-+ thresh 6250Kbit 100Mbit 25Mbit
-+ target 5.0ms 5.0ms 5.0ms
-+ interval 100.0ms 100.0ms 100.0ms
-+ pk_delay 0us 0us 0us
-+ av_delay 0us 0us 0us
-+ sp_delay 0us 0us 0us
-+ pkts 0 0 0
-+ bytes 0 0 0
-+ way_inds 0 0 0
-+ way_miss 0 0 0
-+ way_cols 0 0 0
-+ drops 0 0 0
-+ marks 0 0 0
-+ ack_drop 0 0 0
-+ sp_flows 0 0 0
-+ bk_flows 0 0 0
-+ un_flows 0 0 0
-+ max_len 0 0 0
-+ quantum 300 1514 762
-+
-+After some use:
-+.br
-+# tc -s qdisc show dev eth0
-+
-+qdisc cake 1: root refcnt 2 bandwidth 100Mbit diffserv3 triple-isolate rtt 100.0ms noatm overhead 38 mpu 84
-+ Sent 44709231 bytes 31931 pkt (dropped 45, overlimits 93782 requeues 0)
-+ backlog 33308b 22p requeues 0
-+ memory used: 292352b of 5000000b
-+ capacity estimate: 100Mbit
-+ min/max network layer size: 28 / 1500
-+ min/max overhead-adjusted size: 84 / 1538
-+ average network hdr offset: 14
-+
-+ Bulk Best Effort Voice
-+ thresh 6250Kbit 100Mbit 25Mbit
-+ target 5.0ms 5.0ms 5.0ms
-+ interval 100.0ms 100.0ms 100.0ms
-+ pk_delay 8.7ms 6.9ms 5.0ms
-+ av_delay 4.9ms 5.3ms 3.8ms
-+ sp_delay 727us 1.4ms 511us
-+ pkts 2590 21271 8137
-+ bytes 3081804 30302659 11426206
-+ way_inds 0 46 0
-+ way_miss 3 17 4
-+ way_cols 0 0 0
-+ drops 20 15 10
-+ marks 0 0 0
-+ ack_drop 0 0 0
-+ sp_flows 2 4 1
-+ bk_flows 1 2 1
-+ un_flows 0 0 0
-+ max_len 1514 1514 1514
-+ quantum 300 1514 762
-+
-+.SH SEE ALSO
-+.BR tc (8),
-+.BR tc-codel (8),
-+.BR tc-fq_codel (8),
-+.BR tc-htb (8)
-+
-+.SH AUTHORS
-+Cake's principal author is Jonathan Morton, with contributions from
-+Tony Ambardar, Kevin Darbyshire-Bryant, Toke Høiland-Jørgensen,
-+Sebastian Moeller, Ryan Mounce, Dean Scarff, Nils Andreas Svee, and Dave Täht.
-+
-+This manual page was written by Loganaden Velvindron. Please report corrections
-+to the Linux Networking mailing list <netdev@vger.kernel.org>.
---- a/man/man8/tc.8
-+++ b/man/man8/tc.8
-@@ -795,6 +795,7 @@ was written by Alexey N. Kuznetsov and a
- .BR tc-basic (8),
- .BR tc-bfifo (8),
- .BR tc-bpf (8),
-+.BR tc-cake (8),
- .BR tc-cbq (8),
- .BR tc-cgroup (8),
- .BR tc-choke (8),
---- a/tc/Makefile
-+++ b/tc/Makefile
-@@ -66,6 +66,7 @@ TCMODULES += q_codel.o
- TCMODULES += q_fq_codel.o
- TCMODULES += q_fq.o
- TCMODULES += q_pie.o
-+TCMODULES += q_cake.o
- TCMODULES += q_hhf.o
- TCMODULES += q_clsact.o
- TCMODULES += e_bpf.o
---- /dev/null
-+++ b/tc/q_cake.c
-@@ -0,0 +1,805 @@
-+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
-+
-+/*
-+ * Common Applications Kept Enhanced -- CAKE
-+ *
-+ * Copyright (C) 2014-2018 Jonathan Morton <chromatix99@gmail.com>
-+ * Copyright (C) 2017-2018 Toke Høiland-Jørgensen <toke@toke.dk>
-+ */
-+
-+#include <stddef.h>
-+#include <stdio.h>
-+#include <stdlib.h>
-+#include <unistd.h>
-+#include <syslog.h>
-+#include <fcntl.h>
-+#include <sys/socket.h>
-+#include <netinet/in.h>
-+#include <arpa/inet.h>
-+#include <string.h>
-+#include <inttypes.h>
-+
-+#include "utils.h"
-+#include "tc_util.h"
-+
-+struct cake_preset {
-+ char *name;
-+ unsigned int target;
-+ unsigned int interval;
-+};
-+
-+static struct cake_preset presets[] = {
-+ {"datacentre", 5, 100},
-+ {"lan", 50, 1000},
-+ {"metro", 500, 10000},
-+ {"regional", 1500, 30000},
-+ {"internet", 5000, 100000},
-+ {"oceanic", 15000, 300000},
-+ {"satellite", 50000, 1000000},
-+ {"interplanetary", 50000000, 1000000000},
-+};
-+
-+static const char * diffserv_names[CAKE_DIFFSERV_MAX] = {
-+ [CAKE_DIFFSERV_DIFFSERV3] = "diffserv3",
-+ [CAKE_DIFFSERV_DIFFSERV4] = "diffserv4",
-+ [CAKE_DIFFSERV_DIFFSERV8] = "diffserv8",
-+ [CAKE_DIFFSERV_BESTEFFORT] = "besteffort",
-+ [CAKE_DIFFSERV_PRECEDENCE] = "precedence",
-+};
-+
-+static const char * flowmode_names[CAKE_FLOW_MAX] = {
-+ [CAKE_FLOW_NONE] = "flowblind",
-+ [CAKE_FLOW_SRC_IP] = "srchost",
-+ [CAKE_FLOW_DST_IP] = "dsthost",
-+ [CAKE_FLOW_HOSTS] = "hosts",
-+ [CAKE_FLOW_FLOWS] = "flows",
-+ [CAKE_FLOW_DUAL_SRC] = "dual-srchost",
-+ [CAKE_FLOW_DUAL_DST] = "dual-dsthost",
-+ [CAKE_FLOW_TRIPLE] = "triple-isolate",
-+};
-+
-+static struct cake_preset *find_preset(char *argv)
-+{
-+ int i;
-+
-+ for (i = 0; i < ARRAY_SIZE(presets); i++)
-+ if (!strcmp(argv, presets[i].name))
-+ return &presets[i];
-+ return NULL;
-+}
-+
-+static void explain(void)
-+{
-+ fprintf(stderr,
-+"Usage: ... cake [ bandwidth RATE | unlimited* | autorate-ingress ]\n"
-+" [ rtt TIME | datacentre | lan | metro | regional |\n"
-+" internet* | oceanic | satellite | interplanetary ]\n"
-+" [ besteffort | diffserv8 | diffserv4 | diffserv3* ]\n"
-+" [ flowblind | srchost | dsthost | hosts | flows |\n"
-+" dual-srchost | dual-dsthost | triple-isolate* ]\n"
-+" [ nat | nonat* ]\n"
-+" [ wash | nowash* ]\n"
-+" [ split-gso* | no-split-gso ]\n"
-+" [ ack-filter | ack-filter-aggressive | no-ack-filter* ]\n"
-+" [ memlimit LIMIT ]\n"
-+" [ ptm | atm | noatm* ] [ overhead N | conservative | raw* ]\n"
-+" [ mpu N ] [ ingress | egress* ]\n"
-+" (* marks defaults)\n");
-+}
-+
-+static int cake_parse_opt(struct qdisc_util *qu, int argc, char **argv,
-+ struct nlmsghdr *n, const char *dev)
-+{
-+ struct cake_preset *preset, *preset_set = NULL;
-+ bool overhead_override = false;
-+ bool overhead_set = false;
-+ unsigned int interval = 0;
-+ unsigned int diffserv = 0;
-+ unsigned int memlimit = 0;
-+ unsigned int target = 0;
-+ __u64 bandwidth = 0;
-+ int ack_filter = -1;
-+ struct rtattr *tail;
-+ int split_gso = -1;
-+ int unlimited = 0;
-+ int flowmode = -1;
-+ int autorate = -1;
-+ int ingress = -1;
-+ int overhead = 0;
-+ int wash = -1;
-+ int nat = -1;
-+ int atm = -1;
-+ int mpu = 0;
-+
-+ while (argc > 0) {
-+ if (strcmp(*argv, "bandwidth") == 0) {
-+ NEXT_ARG();
-+ if (get_rate64(&bandwidth, *argv)) {
-+ fprintf(stderr, "Illegal \"bandwidth\"\n");
-+ return -1;
-+ }
-+ unlimited = 0;
-+ autorate = 0;
-+ } else if (strcmp(*argv, "unlimited") == 0) {
-+ bandwidth = 0;
-+ unlimited = 1;
-+ autorate = 0;
-+ } else if (strcmp(*argv, "autorate-ingress") == 0) {
-+ autorate = 1;
-+ } else if (strcmp(*argv, "rtt") == 0) {
-+ NEXT_ARG();
-+ if (get_time(&interval, *argv)) {
-+ fprintf(stderr, "Illegal \"rtt\"\n");
-+ return -1;
-+ }
-+ target = interval / 20;
-+ if (!target)
-+ target = 1;
-+ } else if ((preset = find_preset(*argv))) {
-+ if (preset_set)
-+ duparg(*argv, preset_set->name);
-+ preset_set = preset;
-+ target = preset->target;
-+ interval = preset->interval;
-+ } else if (strcmp(*argv, "besteffort") == 0) {
-+ diffserv = CAKE_DIFFSERV_BESTEFFORT;
-+ } else if (strcmp(*argv, "precedence") == 0) {
-+ diffserv = CAKE_DIFFSERV_PRECEDENCE;
-+ } else if (strcmp(*argv, "diffserv8") == 0) {
-+ diffserv = CAKE_DIFFSERV_DIFFSERV8;
-+ } else if (strcmp(*argv, "diffserv4") == 0) {
-+ diffserv = CAKE_DIFFSERV_DIFFSERV4;
-+ } else if (strcmp(*argv, "diffserv") == 0) {
-+ diffserv = CAKE_DIFFSERV_DIFFSERV4;
-+ } else if (strcmp(*argv, "diffserv3") == 0) {
-+ diffserv = CAKE_DIFFSERV_DIFFSERV3;
-+ } else if (strcmp(*argv, "nowash") == 0) {
-+ wash = 0;
-+ } else if (strcmp(*argv, "wash") == 0) {
-+ wash = 1;
-+ } else if (strcmp(*argv, "split-gso") == 0) {
-+ split_gso = 1;
-+ } else if (strcmp(*argv, "no-split-gso") == 0) {
-+ split_gso = 0;
-+ } else if (strcmp(*argv, "flowblind") == 0) {
-+ flowmode = CAKE_FLOW_NONE;
-+ } else if (strcmp(*argv, "srchost") == 0) {
-+ flowmode = CAKE_FLOW_SRC_IP;
-+ } else if (strcmp(*argv, "dsthost") == 0) {
-+ flowmode = CAKE_FLOW_DST_IP;
-+ } else if (strcmp(*argv, "hosts") == 0) {
-+ flowmode = CAKE_FLOW_HOSTS;
-+ } else if (strcmp(*argv, "flows") == 0) {
-+ flowmode = CAKE_FLOW_FLOWS;
-+ } else if (strcmp(*argv, "dual-srchost") == 0) {
-+ flowmode = CAKE_FLOW_DUAL_SRC;
-+ } else if (strcmp(*argv, "dual-dsthost") == 0) {
-+ flowmode = CAKE_FLOW_DUAL_DST;
-+ } else if (strcmp(*argv, "triple-isolate") == 0) {
-+ flowmode = CAKE_FLOW_TRIPLE;
-+ } else if (strcmp(*argv, "nat") == 0) {
-+ nat = 1;
-+ } else if (strcmp(*argv, "nonat") == 0) {
-+ nat = 0;
-+ } else if (strcmp(*argv, "ptm") == 0) {
-+ atm = CAKE_ATM_PTM;
-+ } else if (strcmp(*argv, "atm") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ } else if (strcmp(*argv, "noatm") == 0) {
-+ atm = CAKE_ATM_NONE;
-+ } else if (strcmp(*argv, "raw") == 0) {
-+ atm = CAKE_ATM_NONE;
-+ overhead = 0;
-+ overhead_set = true;
-+ overhead_override = true;
-+ } else if (strcmp(*argv, "conservative") == 0) {
-+ /*
-+ * Deliberately over-estimate overhead:
-+ * one whole ATM cell plus ATM framing.
-+ * A safe choice if the actual overhead is unknown.
-+ */
-+ atm = CAKE_ATM_ATM;
-+ overhead = 48;
-+ overhead_set = true;
-+
-+ /* Various ADSL framing schemes, all over ATM cells */
-+ } else if (strcmp(*argv, "ipoa-vcmux") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 8;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "ipoa-llcsnap") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 16;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "bridged-vcmux") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 24;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "bridged-llcsnap") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 32;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "pppoa-vcmux") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 10;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "pppoa-llc") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 14;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "pppoe-vcmux") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 32;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "pppoe-llcsnap") == 0) {
-+ atm = CAKE_ATM_ATM;
-+ overhead += 40;
-+ overhead_set = true;
-+
-+ /* Typical VDSL2 framing schemes, both over PTM */
-+ /* PTM has 64b/65b coding which absorbs some bandwidth */
-+ } else if (strcmp(*argv, "pppoe-ptm") == 0) {
-+ /* 2B PPP + 6B PPPoE + 6B dest MAC + 6B src MAC
-+ * + 2B ethertype + 4B Frame Check Sequence
-+ * + 1B Start of Frame (S) + 1B End of Frame (Ck)
-+ * + 2B TC-CRC (PTM-FCS) = 30B
-+ */
-+ atm = CAKE_ATM_PTM;
-+ overhead += 30;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "bridged-ptm") == 0) {
-+ /* 6B dest MAC + 6B src MAC + 2B ethertype
-+ * + 4B Frame Check Sequence
-+ * + 1B Start of Frame (S) + 1B End of Frame (Ck)
-+ * + 2B TC-CRC (PTM-FCS) = 22B
-+ */
-+ atm = CAKE_ATM_PTM;
-+ overhead += 22;
-+ overhead_set = true;
-+ } else if (strcmp(*argv, "via-ethernet") == 0) {
-+ /*
-+ * We used to use this flag to manually compensate for
-+ * Linux including the Ethernet header on Ethernet-type
-+ * interfaces, but not on IP-type interfaces.
-+ *
-+ * It is no longer needed, because Cake now adjusts for
-+ * that automatically, and is thus ignored.
-+ *
-+ * It would be deleted entirely, but it appears in the
-+ * stats output when the automatic compensation is
-+ * active.
-+ */
-+ } else if (strcmp(*argv, "ethernet") == 0) {
-+ /* ethernet pre-amble & interframe gap & FCS
-+ * you may need to add vlan tag
-+ */
-+ overhead += 38;
-+ overhead_set = true;
-+ mpu = 84;
-+
-+ /* Additional Ethernet-related overhead used by some ISPs */
-+ } else if (strcmp(*argv, "ether-vlan") == 0) {
-+ /* 802.1q VLAN tag - may be repeated */
-+ overhead += 4;
-+ overhead_set = true;
-+
-+ /*
-+ * DOCSIS cable shapers account for Ethernet frame with FCS,
-+ * but not interframe gap or preamble.
-+ */
-+ } else if (strcmp(*argv, "docsis") == 0) {
-+ atm = CAKE_ATM_NONE;
-+ overhead += 18;
-+ overhead_set = true;
-+ mpu = 64;
-+ } else if (strcmp(*argv, "overhead") == 0) {
-+ char *p = NULL;
-+
-+ NEXT_ARG();
-+ overhead = strtol(*argv, &p, 10);
-+ if (!p || *p || !*argv ||
-+ overhead < -64 || overhead > 256) {
-+ fprintf(stderr,
-+ "Illegal \"overhead\", valid range is -64 to 256\\n");
-+ return -1;
-+ }
-+ overhead_set = true;
-+
-+ } else if (strcmp(*argv, "mpu") == 0) {
-+ char *p = NULL;
-+
-+ NEXT_ARG();
-+ mpu = strtol(*argv, &p, 10);
-+ if (!p || *p || !*argv || mpu < 0 || mpu > 256) {
-+ fprintf(stderr,
-+ "Illegal \"mpu\", valid range is 0 to 256\\n");
-+ return -1;
-+ }
-+ } else if (strcmp(*argv, "ingress") == 0) {
-+ ingress = 1;
-+ } else if (strcmp(*argv, "egress") == 0) {
-+ ingress = 0;
-+ } else if (strcmp(*argv, "no-ack-filter") == 0) {
-+ ack_filter = CAKE_ACK_NONE;
-+ } else if (strcmp(*argv, "ack-filter") == 0) {
-+ ack_filter = CAKE_ACK_FILTER;
-+ } else if (strcmp(*argv, "ack-filter-aggressive") == 0) {
-+ ack_filter = CAKE_ACK_AGGRESSIVE;
-+ } else if (strcmp(*argv, "memlimit") == 0) {
-+ NEXT_ARG();
-+ if (get_size(&memlimit, *argv)) {
-+ fprintf(stderr,
-+ "Illegal value for \"memlimit\": \"%s\"\n", *argv);
-+ return -1;
-+ }
-+ } else if (strcmp(*argv, "help") == 0) {
-+ explain();
-+ return -1;
-+ } else {
-+ fprintf(stderr, "What is \"%s\"?\n", *argv);
-+ explain();
-+ return -1;
-+ }
-+ argc--; argv++;
-+ }
-+
-+ tail = NLMSG_TAIL(n);
-+ addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
-+ if (bandwidth || unlimited)
-+ addattr_l(n, 1024, TCA_CAKE_BASE_RATE64, &bandwidth,
-+ sizeof(bandwidth));
-+ if (diffserv)
-+ addattr_l(n, 1024, TCA_CAKE_DIFFSERV_MODE, &diffserv,
-+ sizeof(diffserv));
-+ if (atm != -1)
-+ addattr_l(n, 1024, TCA_CAKE_ATM, &atm, sizeof(atm));
-+ if (flowmode != -1)
-+ addattr_l(n, 1024, TCA_CAKE_FLOW_MODE, &flowmode,
-+ sizeof(flowmode));
-+ if (overhead_set)
-+ addattr_l(n, 1024, TCA_CAKE_OVERHEAD, &overhead,
-+ sizeof(overhead));
-+ if (overhead_override) {
-+ unsigned int zero = 0;
-+
-+ addattr_l(n, 1024, TCA_CAKE_RAW, &zero, sizeof(zero));
-+ }
-+ if (mpu > 0)
-+ addattr_l(n, 1024, TCA_CAKE_MPU, &mpu, sizeof(mpu));
-+ if (interval)
-+ addattr_l(n, 1024, TCA_CAKE_RTT, &interval, sizeof(interval));
-+ if (target)
-+ addattr_l(n, 1024, TCA_CAKE_TARGET, &target, sizeof(target));
-+ if (autorate != -1)
-+ addattr_l(n, 1024, TCA_CAKE_AUTORATE, &autorate,
-+ sizeof(autorate));
-+ if (memlimit)
-+ addattr_l(n, 1024, TCA_CAKE_MEMORY, &memlimit,
-+ sizeof(memlimit));
-+ if (nat != -1)
-+ addattr_l(n, 1024, TCA_CAKE_NAT, &nat, sizeof(nat));
-+ if (wash != -1)
-+ addattr_l(n, 1024, TCA_CAKE_WASH, &wash, sizeof(wash));
-+ if (split_gso != -1)
-+ addattr_l(n, 1024, TCA_CAKE_SPLIT_GSO, &split_gso,
-+ sizeof(split_gso));
-+ if (ingress != -1)
-+ addattr_l(n, 1024, TCA_CAKE_INGRESS, &ingress, sizeof(ingress));
-+ if (ack_filter != -1)
-+ addattr_l(n, 1024, TCA_CAKE_ACK_FILTER, &ack_filter,
-+ sizeof(ack_filter));
-+
-+ tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
-+ return 0;
-+}
-+
-+static void cake_print_mode(unsigned int value, unsigned int max,
-+ const char *key, const char **table)
-+{
-+ if (value < max && table[value]) {
-+ print_string(PRINT_ANY, key, "%s ", table[value]);
-+ } else {
-+ print_string(PRINT_JSON, key, NULL, "unknown");
-+ print_string(PRINT_FP, NULL, "(?%s?)", key);
-+ }
-+}
-+
-+static int cake_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
-+{
-+ struct rtattr *tb[TCA_CAKE_MAX + 1];
-+ unsigned int interval = 0;
-+ unsigned int memlimit = 0;
-+ __u64 bandwidth = 0;
-+ int ack_filter = 0;
-+ int split_gso = 0;
-+ int overhead = 0;
-+ int autorate = 0;
-+ int ingress = 0;
-+ int wash = 0;
-+ int raw = 0;
-+ int mpu = 0;
-+ int atm = 0;
-+ int nat = 0;
-+
-+ SPRINT_BUF(b1);
-+ SPRINT_BUF(b2);
-+
-+ if (opt == NULL)
-+ return 0;
-+
-+ parse_rtattr_nested(tb, TCA_CAKE_MAX, opt);
-+
-+ if (tb[TCA_CAKE_BASE_RATE64] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_BASE_RATE64]) >= sizeof(bandwidth)) {
-+ bandwidth = rta_getattr_u64(tb[TCA_CAKE_BASE_RATE64]);
-+ if (bandwidth) {
-+ print_uint(PRINT_JSON, "bandwidth", NULL, bandwidth);
-+ print_string(PRINT_FP, NULL, "bandwidth %s ",
-+ sprint_rate(bandwidth, b1));
-+ } else
-+ print_string(PRINT_ANY, "bandwidth", "bandwidth %s ",
-+ "unlimited");
-+ }
-+ if (tb[TCA_CAKE_AUTORATE] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_AUTORATE]) >= sizeof(__u32)) {
-+ autorate = rta_getattr_u32(tb[TCA_CAKE_AUTORATE]);
-+ if (autorate == 1)
-+ print_string(PRINT_ANY, "autorate", "%s ",
-+ "autorate-ingress");
-+ else if (autorate)
-+ print_string(PRINT_ANY, "autorate", "(?autorate?) ",
-+ "unknown");
-+ }
-+ if (tb[TCA_CAKE_DIFFSERV_MODE] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_DIFFSERV_MODE]) >= sizeof(__u32)) {
-+ cake_print_mode(rta_getattr_u32(tb[TCA_CAKE_DIFFSERV_MODE]),
-+ CAKE_DIFFSERV_MAX, "diffserv", diffserv_names);
-+ }
-+ if (tb[TCA_CAKE_FLOW_MODE] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_FLOW_MODE]) >= sizeof(__u32)) {
-+ cake_print_mode(rta_getattr_u32(tb[TCA_CAKE_FLOW_MODE]),
-+ CAKE_FLOW_MAX, "flowmode", flowmode_names);
-+ }
-+
-+ if (tb[TCA_CAKE_NAT] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_NAT]) >= sizeof(__u32)) {
-+ nat = rta_getattr_u32(tb[TCA_CAKE_NAT]);
-+ }
-+
-+ if (nat)
-+ print_string(PRINT_FP, NULL, "nat ", NULL);
-+ else
-+ print_string(PRINT_FP, NULL, "nonat ", NULL);
-+ print_bool(PRINT_JSON, "nat", NULL, nat);
-+
-+ if (tb[TCA_CAKE_WASH] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_WASH]) >= sizeof(__u32)) {
-+ wash = rta_getattr_u32(tb[TCA_CAKE_WASH]);
-+ }
-+ if (tb[TCA_CAKE_ATM] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_ATM]) >= sizeof(__u32)) {
-+ atm = rta_getattr_u32(tb[TCA_CAKE_ATM]);
-+ }
-+ if (tb[TCA_CAKE_OVERHEAD] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_OVERHEAD]) >= sizeof(__s32)) {
-+ overhead = *(__s32 *) RTA_DATA(tb[TCA_CAKE_OVERHEAD]);
-+ }
-+ if (tb[TCA_CAKE_MPU] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_MPU]) >= sizeof(__u32)) {
-+ mpu = rta_getattr_u32(tb[TCA_CAKE_MPU]);
-+ }
-+ if (tb[TCA_CAKE_INGRESS] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_INGRESS]) >= sizeof(__u32)) {
-+ ingress = rta_getattr_u32(tb[TCA_CAKE_INGRESS]);
-+ }
-+ if (tb[TCA_CAKE_ACK_FILTER] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_ACK_FILTER]) >= sizeof(__u32)) {
-+ ack_filter = rta_getattr_u32(tb[TCA_CAKE_ACK_FILTER]);
-+ }
-+ if (tb[TCA_CAKE_SPLIT_GSO] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_SPLIT_GSO]) >= sizeof(__u32)) {
-+ split_gso = rta_getattr_u32(tb[TCA_CAKE_SPLIT_GSO]);
-+ }
-+ if (tb[TCA_CAKE_RAW]) {
-+ raw = 1;
-+ }
-+ if (tb[TCA_CAKE_RTT] &&
-+ RTA_PAYLOAD(tb[TCA_CAKE_RTT]) >= sizeof(__u32)) {
-+ interval = rta_getattr_u32(tb[TCA_CAKE_RTT]);
-+ }
-+
-+ if (wash)
-+ print_string(PRINT_FP, NULL, "wash ", NULL);
-+ else
-+ print_string(PRINT_FP, NULL, "nowash ", NULL);
-+ print_bool(PRINT_JSON, "wash", NULL, wash);
-+
-+ if (ingress)
-+ print_string(PRINT_FP, NULL, "ingress ", NULL);
-+ print_bool(PRINT_JSON, "ingress", NULL, ingress);
-+
-+ if (ack_filter == CAKE_ACK_AGGRESSIVE)
-+ print_string(PRINT_ANY, "ack-filter", "ack-filter-%s ",
-+ "aggressive");
-+ else if (ack_filter == CAKE_ACK_FILTER)
-+ print_string(PRINT_ANY, "ack-filter", "ack-filter ", "enabled");
-+ else
-+ print_string(PRINT_ANY, "ack-filter", "no-ack-filter ", "disabled");
-+
-+ if (split_gso)
-+ print_string(PRINT_FP, NULL, "split-gso ", NULL);
-+ else
-+ print_string(PRINT_FP, NULL, "no-split-gso ", NULL);
-+ print_bool(PRINT_JSON, "split_gso", NULL, split_gso);
-+
-+ if (interval)
-+ print_string(PRINT_FP, NULL, "rtt %s ",
-+ sprint_time(interval, b2));
-+ print_uint(PRINT_JSON, "rtt", NULL, interval);
-+
-+ if (raw)
-+ print_string(PRINT_FP, NULL, "raw ", NULL);
-+ print_bool(PRINT_JSON, "raw", NULL, raw);
-+
-+ if (atm == CAKE_ATM_ATM)
-+ print_string(PRINT_ANY, "atm", "%s ", "atm");
-+ else if (atm == CAKE_ATM_PTM)
-+ print_string(PRINT_ANY, "atm", "%s ", "ptm");
-+ else if (!raw)
-+ print_string(PRINT_ANY, "atm", "%s ", "noatm");
-+
-+ print_int(PRINT_ANY, "overhead", "overhead %d ", overhead);
-+
-+ if (mpu)
-+ print_uint(PRINT_ANY, "mpu", "mpu %u ", mpu);
-+
-+ if (memlimit) {
-+ print_uint(PRINT_JSON, "memlimit", NULL, memlimit);
-+ print_string(PRINT_FP, NULL, "memlimit %s",
-+ sprint_size(memlimit, b1));
-+ }
-+
-+ return 0;
-+}
-+
-+static void cake_print_json_tin(struct rtattr **tstat)
-+{
-+#define PRINT_TSTAT_JSON(type, name, attr) if (tstat[TCA_CAKE_TIN_STATS_ ## attr]) \
-+ print_u64(PRINT_JSON, name, NULL, \
-+ rta_getattr_ ## type((struct rtattr *) \
-+ tstat[TCA_CAKE_TIN_STATS_ ## attr]))
-+
-+ open_json_object(NULL);
-+ PRINT_TSTAT_JSON(u64, "threshold_rate", THRESHOLD_RATE64);
-+ PRINT_TSTAT_JSON(u64, "sent_bytes", SENT_BYTES64);
-+ PRINT_TSTAT_JSON(u32, "backlog_bytes", BACKLOG_BYTES);
-+ PRINT_TSTAT_JSON(u32, "target_us", TARGET_US);
-+ PRINT_TSTAT_JSON(u32, "interval_us", INTERVAL_US);
-+ PRINT_TSTAT_JSON(u32, "peak_delay_us", PEAK_DELAY_US);
-+ PRINT_TSTAT_JSON(u32, "avg_delay_us", AVG_DELAY_US);
-+ PRINT_TSTAT_JSON(u32, "base_delay_us", BASE_DELAY_US);
-+ PRINT_TSTAT_JSON(u32, "sent_packets", SENT_PACKETS);
-+ PRINT_TSTAT_JSON(u32, "way_indirect_hits", WAY_INDIRECT_HITS);
-+ PRINT_TSTAT_JSON(u32, "way_misses", WAY_MISSES);
-+ PRINT_TSTAT_JSON(u32, "way_collisions", WAY_COLLISIONS);
-+ PRINT_TSTAT_JSON(u32, "drops", DROPPED_PACKETS);
-+ PRINT_TSTAT_JSON(u32, "ecn_mark", ECN_MARKED_PACKETS);
-+ PRINT_TSTAT_JSON(u32, "ack_drops", ACKS_DROPPED_PACKETS);
-+ PRINT_TSTAT_JSON(u32, "sparse_flows", SPARSE_FLOWS);
-+ PRINT_TSTAT_JSON(u32, "bulk_flows", BULK_FLOWS);
-+ PRINT_TSTAT_JSON(u32, "unresponsive_flows", UNRESPONSIVE_FLOWS);
-+ PRINT_TSTAT_JSON(u32, "max_pkt_len", MAX_SKBLEN);
-+ PRINT_TSTAT_JSON(u32, "flow_quantum", FLOW_QUANTUM);
-+ close_json_object();
-+
-+#undef PRINT_TSTAT_JSON
-+}
-+
-+static int cake_print_xstats(struct qdisc_util *qu, FILE *f,
-+ struct rtattr *xstats)
-+{
-+ struct rtattr *st[TCA_CAKE_STATS_MAX + 1];
-+ SPRINT_BUF(b1);
-+ int i;
-+
-+ if (xstats == NULL)
-+ return 0;
-+
-+#define GET_STAT_U32(attr) rta_getattr_u32(st[TCA_CAKE_STATS_ ## attr])
-+#define GET_STAT_S32(attr) (*(__s32 *)RTA_DATA(st[TCA_CAKE_STATS_ ## attr]))
-+#define GET_STAT_U64(attr) rta_getattr_u64(st[TCA_CAKE_STATS_ ## attr])
-+
-+ parse_rtattr_nested(st, TCA_CAKE_STATS_MAX, xstats);
-+
-+ if (st[TCA_CAKE_STATS_MEMORY_USED] &&
-+ st[TCA_CAKE_STATS_MEMORY_LIMIT]) {
-+ print_string(PRINT_FP, NULL, " memory used: %s",
-+ sprint_size(GET_STAT_U32(MEMORY_USED), b1));
-+
-+ print_string(PRINT_FP, NULL, " of %s\n",
-+ sprint_size(GET_STAT_U32(MEMORY_LIMIT), b1));
-+
-+ print_uint(PRINT_JSON, "memory_used", NULL,
-+ GET_STAT_U32(MEMORY_USED));
-+ print_uint(PRINT_JSON, "memory_limit", NULL,
-+ GET_STAT_U32(MEMORY_LIMIT));
-+ }
-+
-+ if (st[TCA_CAKE_STATS_CAPACITY_ESTIMATE64]) {
-+ print_string(PRINT_FP, NULL, " capacity estimate: %s\n",
-+ sprint_rate(GET_STAT_U64(CAPACITY_ESTIMATE64), b1));
-+ print_uint(PRINT_JSON, "capacity_estimate", NULL,
-+ GET_STAT_U64(CAPACITY_ESTIMATE64));
-+ }
-+
-+ if (st[TCA_CAKE_STATS_MIN_NETLEN] &&
-+ st[TCA_CAKE_STATS_MAX_NETLEN]) {
-+ print_uint(PRINT_ANY, "min_network_size",
-+ " min/max network layer size: %12u",
-+ GET_STAT_U32(MIN_NETLEN));
-+ print_uint(PRINT_ANY, "max_network_size",
-+ " /%8u\n", GET_STAT_U32(MAX_NETLEN));
-+ }
-+
-+ if (st[TCA_CAKE_STATS_MIN_ADJLEN] &&
-+ st[TCA_CAKE_STATS_MAX_ADJLEN]) {
-+ print_uint(PRINT_ANY, "min_adj_size",
-+ " min/max overhead-adjusted size: %8u",
-+ GET_STAT_U32(MIN_ADJLEN));
-+ print_uint(PRINT_ANY, "max_adj_size",
-+ " /%8u\n", GET_STAT_U32(MAX_ADJLEN));
-+ }
-+
-+ if (st[TCA_CAKE_STATS_AVG_NETOFF])
-+ print_uint(PRINT_ANY, "avg_hdr_offset",
-+ " average network hdr offset: %12u\n\n",
-+ GET_STAT_U32(AVG_NETOFF));
-+
-+ /* class stats */
-+ if (st[TCA_CAKE_STATS_DEFICIT])
-+ print_int(PRINT_ANY, "deficit", " deficit %u",
-+ GET_STAT_S32(DEFICIT));
-+ if (st[TCA_CAKE_STATS_COBALT_COUNT])
-+ print_uint(PRINT_ANY, "count", " count %u",
-+ GET_STAT_U32(COBALT_COUNT));
-+
-+ if (st[TCA_CAKE_STATS_DROPPING] && GET_STAT_U32(DROPPING)) {
-+ print_bool(PRINT_ANY, "dropping", " dropping", true);
-+ if (st[TCA_CAKE_STATS_DROP_NEXT_US]) {
-+ int drop_next = GET_STAT_S32(DROP_NEXT_US);
-+
-+ if (drop_next < 0) {
-+ print_string(PRINT_FP, NULL, " drop_next -%s",
-+ sprint_time(drop_next, b1));
-+ } else {
-+ print_uint(PRINT_JSON, "drop_next", NULL,
-+ drop_next);
-+ print_string(PRINT_FP, NULL, " drop_next %s",
-+ sprint_time(drop_next, b1));
-+ }
-+ }
-+ }
-+
-+ if (st[TCA_CAKE_STATS_P_DROP]) {
-+ print_uint(PRINT_ANY, "blue_prob", " blue_prob %u",
-+ GET_STAT_U32(P_DROP));
-+ if (st[TCA_CAKE_STATS_BLUE_TIMER_US]) {
-+ int blue_timer = GET_STAT_S32(BLUE_TIMER_US);
-+
-+ if (blue_timer < 0) {
-+ print_string(PRINT_FP, NULL, " blue_timer -%s",
-+ sprint_time(blue_timer, b1));
-+ } else {
-+ print_uint(PRINT_JSON, "blue_timer", NULL,
-+ blue_timer);
-+ print_string(PRINT_FP, NULL, " blue_timer %s",
-+ sprint_time(blue_timer, b1));
-+ }
-+ }
-+ }
-+
-+#undef GET_STAT_U32
-+#undef GET_STAT_S32
-+#undef GET_STAT_U64
-+
-+ if (st[TCA_CAKE_STATS_TIN_STATS]) {
-+ struct rtattr *tstat[TC_CAKE_MAX_TINS][TCA_CAKE_TIN_STATS_MAX + 1];
-+ struct rtattr *tins[TC_CAKE_MAX_TINS + 1];
-+ int num_tins = 0;
-+
-+ parse_rtattr_nested(tins, TC_CAKE_MAX_TINS,
-+ st[TCA_CAKE_STATS_TIN_STATS]);
-+
-+ for (i = 1; i <= TC_CAKE_MAX_TINS && tins[i]; i++) {
-+ parse_rtattr_nested(tstat[i-1], TCA_CAKE_TIN_STATS_MAX,
-+ tins[i]);
-+ num_tins++;
-+ }
-+
-+ if (!num_tins)
-+ return 0;
-+
-+ if (is_json_context()) {
-+ open_json_array(PRINT_JSON, "tins");
-+ for (i = 0; i < num_tins; i++)
-+ cake_print_json_tin(tstat[i]);
-+ close_json_array(PRINT_JSON, NULL);
-+
-+ return 0;
-+ }
-+
-+
-+ switch (num_tins) {
-+ case 3:
-+ fprintf(f, " Bulk Best Effort Voice\n");
-+ break;
-+
-+ case 4:
-+ fprintf(f, " Bulk Best Effort Video Voice\n");
-+ break;
-+
-+ default:
-+ fprintf(f, " ");
-+ for (i = 0; i < num_tins; i++)
-+ fprintf(f, " Tin %u", i);
-+ fprintf(f, "\n");
-+ };
-+
-+#define GET_TSTAT(i, attr) (tstat[i][TCA_CAKE_TIN_STATS_ ## attr])
-+#define PRINT_TSTAT(name, attr, fmts, val) do { \
-+ if (GET_TSTAT(0, attr)) { \
-+ fprintf(f, name); \
-+ for (i = 0; i < num_tins; i++) \
-+ fprintf(f, " %12" fmts, val); \
-+ fprintf(f, "\n"); \
-+ } \
-+ } while (0)
-+
-+#define SPRINT_TSTAT(pfunc, type, name, attr) PRINT_TSTAT( \
-+ name, attr, "s", sprint_ ## pfunc( \
-+ rta_getattr_ ## type(GET_TSTAT(i, attr)), b1))
-+
-+#define PRINT_TSTAT_U32(name, attr) PRINT_TSTAT( \
-+ name, attr, "u", rta_getattr_u32(GET_TSTAT(i, attr)))
-+
-+#define PRINT_TSTAT_U64(name, attr) PRINT_TSTAT( \
-+ name, attr, "llu", rta_getattr_u64(GET_TSTAT(i, attr)))
-+
-+ SPRINT_TSTAT(rate, u64, " thresh ", THRESHOLD_RATE64);
-+ SPRINT_TSTAT(time, u32, " target ", TARGET_US);
-+ SPRINT_TSTAT(time, u32, " interval", INTERVAL_US);
-+ SPRINT_TSTAT(time, u32, " pk_delay", PEAK_DELAY_US);
-+ SPRINT_TSTAT(time, u32, " av_delay", AVG_DELAY_US);
-+ SPRINT_TSTAT(time, u32, " sp_delay", BASE_DELAY_US);
-+ SPRINT_TSTAT(size, u32, " backlog ", BACKLOG_BYTES);
-+
-+ PRINT_TSTAT_U32(" pkts ", SENT_PACKETS);
-+ PRINT_TSTAT_U64(" bytes ", SENT_BYTES64);
-+
-+ PRINT_TSTAT_U32(" way_inds", WAY_INDIRECT_HITS);
-+ PRINT_TSTAT_U32(" way_miss", WAY_MISSES);
-+ PRINT_TSTAT_U32(" way_cols", WAY_COLLISIONS);
-+ PRINT_TSTAT_U32(" drops ", DROPPED_PACKETS);
-+ PRINT_TSTAT_U32(" marks ", ECN_MARKED_PACKETS);
-+ PRINT_TSTAT_U32(" ack_drop", ACKS_DROPPED_PACKETS);
-+ PRINT_TSTAT_U32(" sp_flows", SPARSE_FLOWS);
-+ PRINT_TSTAT_U32(" bk_flows", BULK_FLOWS);
-+ PRINT_TSTAT_U32(" un_flows", UNRESPONSIVE_FLOWS);
-+ PRINT_TSTAT_U32(" max_len ", MAX_SKBLEN);
-+ PRINT_TSTAT_U32(" quantum ", FLOW_QUANTUM);
-+
-+#undef GET_STAT
-+#undef PRINT_TSTAT
-+#undef SPRINT_TSTAT
-+#undef PRINT_TSTAT_U32
-+#undef PRINT_TSTAT_U64
-+ }
-+ return 0;
-+}
-+
-+struct qdisc_util cake_qdisc_util = {
-+ .id = "cake",
-+ .parse_qopt = cake_parse_opt,
-+ .print_qopt = cake_print_opt,
-+ .print_xstats = cake_print_xstats,
-+};
projects / openwrt / openwrt.git / commitdiff