We have helper routines to support nested attribute addition into
netlink buffer: use them instead of open coding.
Use addattr_nest_compat()/addattr_nest_compat_end() where appropriate.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
This patch adapts the tc command line interface to allow bandwidth limits
to be specified as a percentage of the interface's capacity.
Adding this functionality requires passing the specified device string to
each class/qdisc which changes the prototype for a couple of functions: the
.parse_qopt and .parse_copt interfaces. The device string is a required
parameter for tc-qdisc and tc-class, and when not specified, the kernel
returns ENODEV. In this patch, if the user tries to specify a bandwidth
percentage without naming the device, we return an error from userspace.
Signed-off-by: Nishanth Devarajan<ndev2021@gmail.com>
Assuming 'opt' might be NULL, move the call to RTA_PAYLOAD to after the
check since it dereferences its parameter.
Signed-off-by: Phil Sutter <phil@nwl.cc>
This big patch was compiled by vimgrepping for memset calls and changing
to C99 initializer if applicable. One notable exception is the
initialization of union bpf_attr in tc/tc_bpf.c: changing it would break
for older gcc versions (at least <=3.4.6).
Calls to memset for struct rtattr pointer fields for parse_rtattr*()
were just dropped since they are not needed.
The changes here allowed the compiler to discover some unused variables,
so get rid of them, too.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
First, the default value for 1-k is documented as being 0, but is
currently being set to 1. (100%). This causes all packets to be dropped
in the good state if 1-k is not explicitly specified. Fix this by setting
the default to 0.
Second, the 1-h option is parsed correctly, however, the kernel is
expecting "h", not 1-h. Fix this by inverting the "1-h" percentage before
sending to and after receiving from the kernel. This does change the
behavior, but makes it consistent with the netem documentation and the
literature on the Gilbert-Elliot model, which refer to "1-h" and "1-k,"
not "h" or "k" directly.
Last, fix a minor formatting issue for the options reporting.
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
The display of the entire netem loss state is shown as if it
were gemodel state, as the loss state information is assigned to the
wrong pointer. Correct this by assigning the loss state to the correct
pointer.
Additionally, attempting to set netem loss state will result in
random values in the p14 state probability because the option value
passed to the kernel by tc netem is not parsed or initialized. Fix this
by supplying a default value of 0 for p14 and parsing the p14 value if
one is supplied.
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
netem support 64bit rates start from linux-3.13.
Add 64bit rates support in tc tools.
tc qdisc show dev eth0
qdisc netem 1: dev eth4 root refcnt 2 limit 1000 rate 35Gbit
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Eric Dumazet <edumazet@google.com>
This patch provides support for marking packets with ECN instead of
dropping them with netem. This makes it possible to make use of the
netem ECN marking feature that was added recently to the kernel.
Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com>
(Resending patch since it looks like my earlier mail did not make it to
netdev).
netem reordering requires that the delay parameter be given. Currently, if no
delay is given, tc prints the error message but still installs the qdisc. Fix
this by printing the usage and failing cleanly.
Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com>
This patch add rate shaping as well as cell support. The link-rate can be
specified via rate options. Three optional arguments control the cell
knobs: packet-overhead, cell-size, cell-overhead. To ratelimit eth0 root
queue to 5kbit/s, with a 20 byte packet overhead, 100 byte cell size and
a 5 byte per cell overhead:
tc qdisc add dev eth0 root netem rate 5kbit 20 100 5
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
get_distribution() returns an int.
cppcheck reported:
[tc/q_netem.c:243]: (style) Checking if unsigned variable 'dist_size' is less than zero.
The mismatch actually rendered the error checking
after get_distribution() ineffective.
Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
[IPROUTE]: Add sprint_ticks() function and use in CBQ
Add helper function to print ticks to avoid assumptions about clock
resolution in CBQ.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
[IPROUTE]: Replace "usec" by "time" in function names
Rename functions containing "usec" since they don't necessarily return
usec units anymore.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
When using tc to change netem attributes, only those values
on the command line should be passed down, others should
remain unchanged.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
