This iproute2 tc patch is connected to the kernel
- commit 8a8e3d84b17 (net_sched: restore "linklayer atm" handling)
The rate table calculated by tc, have gotten replaced in the kernel
and is no-longer used for lookups.
This happened in kernel release v3.8 caused by kernel
- commit 56b765b79 ("htb: improved accuracy at high rates").
This change unfortunately caused breakage of tc overhead and
linklayer parameters.
Kernel overhead handling got fixed in kernel v3.10 by
- commit 01cb71d2d47 (net_sched: restore "overhead xxx" handling)
Kernel linklayer handling got fixed in kernel v3.11 by
- commit 8a8e3d84b17 (net_sched: restore "linklayer atm" handling)
The linklayer fix introduced a struct change, that allow the linklayer
attribute to be transferred between tc and kernel. This patch make use
of this linklayer attribute.
The linklayer setting is transfer to the kernel. And linklayer
setting received from the kernel is printed with a prefixed
"linklayer" when listing current configuration. The default
TC_LINKLAYER_ETHERNET is only printed in detailed output mode.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
"tc class show dev ..." omits the overhead attribute for HTB.
After patch I have :
tc class add dev $DEV parent 1: classid 1:1 est 1sec 4sec htb \
rate 12Mbit mtu 1500 quantum 1514 overhead 20
tc class show dev $DEV
class htb 1:1 root prio 0 rate 12000Kbit overhead 20 ceil 12000Kbit
burst 1500b cburst 1500b
Signed-off-by: Eric Dumazet <edumazet@google.com>
Introducing the function that does the ATM cell alignment, and
modifying tc_calc_rtable() to use this based upon a linklayer
parameter.
Modified from original to use constants from atm.h and
fix all the usages of rtable in same patch.
Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Change tc_calc_rtable() to take a tc_ratespec struct as an
argument. (cell_log still needs to be passed on as a parameter,
because -1 indicate that the cell_log needs to be computed by the
function.).
Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: Stephen Hemminger <stephen.hemminger@vyatta.com>
The only current user is HTB. HTB overhead argument is now passed on
to the kernel (in the struct tc_ratespec). Also correct the data
types.
Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: Stephen Hemminger <stephen.hemminger@vyatta.com>
[IPROUTE]: Introduce tc_calc_xmitsize and use where appropriate
Add tc_calc_xmitsize() as complement to tc_calc_xmittime(), which calculates
the size that can be transmitted at a given rate during a given time.
Replace all expressions of the form "size = rate*tc_core_tick2usec(time))/1000000"
by tc_calc_xmitsize() calls.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
