It is fully legal to submit zero (INADDR_ANY/IN6ADDR_ANY_INIT)
value for local and/or remote endpoints for all tunnel drivers:
no need additionally check this in userspace.
Note that all tunnel specific code already can pass zero address
to the kernel.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
veth and vxcan both create a vitual tunnel between a pair of virtual network
devices. This patch adds the content for the now supported vxcan netdevices
and the documentation to create peer devices for vxcan and veth.
Additional remove 'can' that accidently was on the list of link types which
can be created by 'ip link add' as 'can' devices are real network devices.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
v3:
Rebase and use out() instead of printf().
v2:
Print the path MTU immediately after the MSS, as it is easier to parse
for humans (suggested by Neal Cardwell).
Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
If command is RTM_DELACTION, a non-NULL pointer is passed to rtnl_talk().
Then flag NLM_F_ACK is not set on n->nlmsg_flags and netlink_ack() will
not be called. Command tc will wait for the reply for ever.
Fixes: 86bf43c7c2 ("lib/libnetlink: update rtnl_talk to support malloc buff at run time")
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Chris Mi <chrism@mellanox.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Add missing tag 'vxcan' inside the help text which was missing in commit
efe459c76d ('ip: link add vxcan support').
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Recently `external` support was added to the tunnel drivers, but there is no way
to introspect this from userspace. This adds support for that.
Now `ip -details link` shows it:
```
7: tunl60@NONE: <NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group
default qlen 1
link/tunnel6 :: brd :: promiscuity 0
ip6tnl external any remote :: local :: encaplimit 0 hoplimit 0 tclass 0x00 flowlabel 0x00000 (flowinfo 0x00000000) addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
```
Signed-off-by: Phil Dibowitz <phil@ipom.com>
users of 'matchall' filter can specify a value for the class id: update
bash-completion accordingly.
Fixes: b32c0b64fa ("tc: bash-completion: Add support for matchall")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Group fitting fields into lines and space them equally using the
remaining screen width for each line. If columns don't fit on
one line, break them into the least possible amount of lines and
keep them aligned across lines.
This is done by:
- recording the length of the longest item in each column during
formatting and buffering (which was added in the previous patch)
- fitting as many fields as possible on each line of output
- distributing the remaining padding space equally between the
columns
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
This allows us to measure the maximum field length for each
column before printing fields and will permit us to apply
optimal field spacing and distribution. Structure of the output
buffer with chunked allocation is described in comments.
Output is still unchanged, original spacing is used.
Running over one million sockets with -tul options by simply
modifying main() to loop 50,000 times over the *_show()
functions, buffering the whole output and rendering it at the
end, with 10 UDP sockets, 10 TCP sockets, while throwing
output away, doesn't show significant changes in execution time
on my laptop with an Intel i7-6600U CPU:
- before this patch:
$ time ./ss -tul > /dev/null
real 0m29.899s
user 0m2.017s
sys 0m27.801s
- after this patch:
$ time ./ss -tul > /dev/null
real 0m29.827s
user 0m1.942s
sys 0m27.812s
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Instead of embedding spacing directly while printing contents,
logically declare columns and functions to buffer their content,
to print left and right spacing around fields, to flush them to
screen, and to print headers.
This makes it a bit easier to handle layout changes and prepares
for full output buffering, needed for optimal spacing in field
output layout.
Columns are currently set up to retain exactly the same output
as before. This needs some slight adjustments of the values
previously calculated in main(), as the width value introduced
here already includes the width of left delimiters and spacing
is not explicitly printed anymore whenever a field is printed.
These calculations will go away altogether once automatic width
calculation is implemented.
We can also remove explicit printing of newlines after the final
content for a given line is printed, flushing the last field on
a line will cause field_flush() to print newlines where
appropriate.
No changes in output expected here.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
This is preparation work for output buffering, which will allow
us to use optimal spacing and alignment of logical "columns".
The new out() function is just a re-implementation of a typical
libc's printf(), except that the return value of vfprintf() is
ignored as no callers use it. This implementation will be
replaced in the next patches to provide column width adjustment
and adequate spacing.
All printf() calls that output parts of the socket list are now
replaced by calls to out(). Output of summary and version is
excluded from this.
No functional differences here, output not affected.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Not all callers want parse_action_control*() to advance the
arguments. For instance act_parse_police() does the argument
advancing itself.
Fixes: e67aba5595 ("tc: actions: add helpers to parse and print control actions")
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
tcpi_rcv_ssthresh is an important stats when debugging receive side
behavior.
Add it to the ss output.
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Commit 6bbe5e6290 ("man: tc-csum.8: Fix example") changed both source
and destination IP addresses in example code but missed to update the
example's description accordingly.
Fixes: 6bbe5e6290 ("man: tc-csum.8: Fix example")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Specifying the IFLA_VXLAN_LINK attribute on a vxlan link modify is
optional in the kernel, so make the id argument optional for "ip link
set ..." to avoid a user needing to specify it when changing another
attribute.
Signed-off-by: Robert Shearman <rs823p@att.com>
Specifying "... ttl inherit" currently does nothing on a GRE link
modify since the previous ttl value is retrieved up front. Fix this by
explicitly setting ttl to 0 when "inherit" is specified for the
option, since 0 represents the semantics of inherit.
Signed-off-by: Robert Shearman <rs823p@att.com>
Looks like a typo: get_u8() returns 0 on success and -1 on error, so the
error checking here was ineffective.
Fixes: a11b7b71a6 ("link_gre6: really support encaplimit option")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Make the output same as input and avoid printout of unnecessary len.
Suggested-by: Stephen Hemminger <stephen@networkplumber.org>
Fixes: fd8b3d2c1b ("actions: Add support for user cookies")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Cookie print was made dependent on show_stats for no good reason. Fix
this bu pushing cookie print ot of the stats if.
Fixes: fd8b3d2c1b ("actions: Add support for user cookies")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
When xdpoffload option is used, communicate the ifindex down
to the kernel to trigger device-specific load.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Split parsing and loading of the eBPF program and if skip_sw is set
load the program for ifindex, to which the qdisc is attached.
Note that the ifindex will be ignored for programs which are already
loaded (e.g. when using pinned programs), but in that case we just
trust the user knows what he's doing. Hopefully we will get extack
soon in the driver to help debugging this case.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Move resolving device name into an ifindex before calling filter
specific callbacks. This way if filters need the ifindex, they
can read it from the request.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Both BPF filter and action will allow users to specify run
multiple times, and only the last one will be considered by
the kernel. Explicitly refuse such command lines.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
For BPF offload we need to specify the ifindex when program is
loaded now. Extend the bpf common code to accommodate that.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Expose bpf_parse_common() and bpf_load_common() functions
for those users who may want to modify the parameters to
load after parsing is done.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
bpf_parse_common() parses and loads the program. Rename it
accordingly.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Parsing command line is currently done together with potentially
loading a new eBPF program. This makes it more difficult to
provide additional parameters for loading (which may come after
the eBPF program info on the command line).
Split the two (only internally for now). Verbose parameter
has to be saved in struct bpf_cfg_in to be carried between
the stages.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
struct bpf_cfg_in already carries a pointer to sock_filter ops.
It's currently set to a local variable in bpf_parse_opt_tbl(),
shared between parsing and loading stages. Move the array
entirely to struct bpf_cfg_in, this will allow us to split
parsing and loading.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
bpf_parse() will parse command line arguments to find out the
program mode. This mode will later be needed at loading time.
Instead of keeping it locally add it to struct bpf_cfg_in,
this will allow splitting parsing and loading stages.
enum bpf_mode has to be moved to the header file, because C
doesn't allow forward declaration of enums.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Program type is needed both for parsing and loading of
the program. Parsing may also induce the type based on
signatures from __bpf_prog_meta. Instead of passing
the type around keep it in struct bpf_cfg_in.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Serhey Popovych
Oliver Hartkopp
Roman Mashak
Stephen Hemminger
Chris Mi
Jiri Pirko
Phil Dibowitz
Davide Caratti
Stefano Brivio
Michal Privoznik
Wei Wang
Phil Sutter
Robert Shearman
Jakub Kicinski