As suggested, turn return code into true/false although it's not checked
anywhere yet.
Fixes: 4d82962ccc ("Merge common code for conditionally colored output")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Allow for -color={never,auto,always} to have colored output disabled,
enabled only if stdout is a terminal or enabled regardless of stdout
state.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Instead of calling enable_color() conditionally with identical check in
three places, introduce check_enable_color() which does it in one place.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David Ahern <dsahern@gmail.com>
This partly reverts 8f0807023d, bringing
back the umount(/sys) attempt.
In a LXC container we're unable to umount the sysfs instance, nor mount
a read-write one. We still are able to create a new read-only instance.
Nevertheless, it still makes sense to attempt the umount() even though
the sysfs is mounted read-only. Otherwise we may end up attempting to
mount a sysfs with the same flags as is already mounted, resulting in
an EBUSY error (meaning "Already mounted").
Perhaps this is not a very likely scenario in real world, but we hit
it in NetworkManager test suite and makes netns_switch() somewhat more
robust. It also fixes the case, when /sys wasn't mounted at all.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
This patch adds support for the End.BPF action of the seg6local
lightweight tunnel. Functions from the BPF lightweight tunnel are
re-used in this patch. Example:
$ ip -6 route add fc00::18 encap seg6local action End.BPF endpoint
obj my_bpf.o sec my_func dev eth0
$ ip -6 route show fc00::18
fc00::18 encap seg6local action End.BPF endpoint my_bpf.o:[my_func]
dev eth0 metric 1024 pref medium
v2: - re-use of print_encap_bpf_prog instead of fprintf
- introduction of "endpoint" keyword for more consistency with
others parameters
Signed-off-by: Mathieu Xhonneux <m.xhonneux@gmail.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Implement loading of .BTF section from object file and build up
internal table for retrieving key/value id related to maps in
the BPF program. Latter is done by setting up struct btf_type
table.
One of the issues is that there's a disconnect between the data
types used in the map and struct bpf_elf_map, meaning the underlying
types are unknown from the map description. One way to overcome
this is to add a annotation such that the loader will recognize
the relation to both. BPF_ANNOTATE_KV_PAIR(map_foo, struct key,
struct val); has been added to the API that programs can use.
The loader will then pick the corresponding key/value type ids and
attach it to the maps for creation. This can later on be dumped via
bpftool for introspection.
Example with test_xdp_noinline.o from kernel selftests:
[...]
struct ctl_value {
union {
__u64 value;
__u32 ifindex;
__u8 mac[6];
};
};
struct bpf_map_def __attribute__ ((section("maps"), used)) ctl_array = {
.type = BPF_MAP_TYPE_ARRAY,
.key_size = sizeof(__u32),
.value_size = sizeof(struct ctl_value),
.max_entries = 16,
.map_flags = 0,
};
BPF_ANNOTATE_KV_PAIR(ctl_array, __u32, struct ctl_value);
[...]
Above could also further be wrapped in a macro. Compiling through LLVM and
converting to BTF:
# llc --version
LLVM (http://llvm.org/):
LLVM version 7.0.0svn
Optimized build.
Default target: x86_64-unknown-linux-gnu
Host CPU: skylake
Registered Targets:
bpf - BPF (host endian)
bpfeb - BPF (big endian)
bpfel - BPF (little endian)
[...]
# clang [...] -O2 -target bpf -g -emit-llvm -c test_xdp_noinline.c -o - |
llc -march=bpf -mcpu=probe -mattr=dwarfris -filetype=obj -o test_xdp_noinline.o
# pahole -J test_xdp_noinline.o
Checking pahole dump of BPF object file:
# file test_xdp_noinline.o
test_xdp_noinline.o: ELF 64-bit LSB relocatable, *unknown arch 0xf7* version 1 (SYSV), with debug_info, not stripped
# pahole test_xdp_noinline.o
[...]
struct ctl_value {
union {
__u64 value; /* 0 8 */
__u32 ifindex; /* 0 4 */
__u8 mac[0]; /* 0 0 */
}; /* 0 8 */
/* size: 8, cachelines: 1, members: 1 */
/* last cacheline: 8 bytes */
};
Now loading into kernel and dumping the map via bpftool:
# ip -force link set dev lo xdp obj test_xdp_noinline.o sec xdp-test
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 xdpgeneric/id:227 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
[...]
# bpftool prog show id 227
227: xdp tag a85e060c275c5616 gpl
loaded_at 2018-07-17T14:41:29+0000 uid 0
xlated 8152B not jited memlock 12288B map_ids 381,385,386,382,384,383
# bpftool map dump id 386
[{
"key": 0,
"value": {
"": {
"value": 0,
"ifindex": 0,
"mac": []
}
}
},{
"key": 1,
"value": {
"": {
"value": 0,
"ifindex": 0,
"mac": []
}
}
},{
[...]
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
Do not bail out when AF_ALG is not supported by the kernel and
only do so when a map is requested in object ns where we're
calculating the hash. Otherwise, the loader can operate just
fine, therefore lets not fail early when it's not needed.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
No need to spam the user with this if it can be fixed gracefully
anyway. Therefore, move it under verbose option.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
Add support for:
BGP
ISIS
OSPF
RIP
EIGRP
Routing protocols to iproute2.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Allowing 0% is sometimes useful for example in netem loss and drop
or perhaps dropping all traffic in a HTB bin.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199745
Reported-by: stuartmarsden@gmail.com
Fixes: 927e3cfb52 ("tc: B.W limits can now be specified in %.")
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Users have reported a regression due to ip now dropping capabilities
unconditionally.
zerotier-one VPN and VirtualBox use ambient capabilities in their
binary and then fork out to ip to set routes and links, and this
does not work anymore.
As a workaround, do not drop caps if CAP_NET_ADMIN (the most common
capability used by ip) is set with the INHERITABLE flag.
Users that want ip vrf exec to work do not need to set INHERITABLE,
which will then only set when the calling program had privileges to
give itself the ambient capability.
Fixes: ba2fc55b99 ("Drop capabilities if not running ip exec vrf with libcap")
Signed-off-by: Luca Boccassi <bluca@debian.org>
Perf arrays are handled specially by the kernel, don't request
offload even when used by an offloaded program.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
print_uint() will silently promote its variable type to uint64_t, but there
is nothing that ensures that the format string specifier passed along with
it fits (and the function name suggest to pass "%u").
Fix this by changing print_uint() to use a native 'unsigned int' type, and
introduce a separate print_u64() function for printing 64-bit values. All
call sites that were actually printing 64-bit values using print_uint() are
converted to use print_u64() instead.
Since print_int() was already using native int types, just add a
print_s64() to match, but don't convert any call sites. For symmetry,
also add a print_luint() method (with no users).
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
In theory, the path for BPF could exceed the 4K PATH_MAX.
In practice, not really possible. But shut up gcc.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Thomas reported a change in behavior with respect to autodectecting
address families. Specifically, 'ip ro add default via fe80::1'
syntax was failing to treat fe80::1 as an IPv6 address as it did in
prior releases. The root causes appears to be a change in family when
the default keyword is parsed.
'default', 'any' and 'all' are relevant outside of AF_INET. Leave the
family arg as is for these when setting addr.
Fixes: 93fa12418d ("utils: Always specify family and ->bytelen in get_prefix_1()")
Reported-by: Thomas Deutschmann <whissi@gentoo.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Serhey Popovych <serhe.popovych@gmail.com>
A problem was reported with parsing of prefixes all/any/default.
Commit 7696f1097f fixes the problem,
but there were also other pathces applied:
00b31a6b2e, which were intended to
fix the same problem. And they became redundant now. This patch
reverts changes introduced by those redundant patches.
Signed-off-by: Alexander Zubkov <green@msu.ru>
Use strlcpy to avoid cases where sizeof(buf) == strlen(buf)
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
ip vrf exec requires root or CAP_NET_ADMIN, CAP_SYS_ADMIN and
CAP_DAC_OVERRIDE. It is not possible to run unprivileged commands like
ping as non-root or non-cap-enabled due to this requirement.
To allow users and administrators to safely add the required
capabilities to the binary, drop all capabilities on start if not
invoked with "vrf exec".
Update the manpage with the requirements.
Signed-off-by: Luca Boccassi <bluca@debian.org>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Debian maintainer found that basic command:
# ip route flush all
No longer worked as expected which breaks user scripts and
expectations. It no longer flushed all IPv4 routes.
Recently behavior of "default" prefix parameter was corrected. But at
the same time behavior of "all"/"any" was altered too, because they
were the same branch of the code. As those parameters mean different,
they need to be treated differently in code too. This patch reflects
the difference.
Also after mentioned change, address parsing code was changed more
and address family was set explicitly even for "all"/"any" addresses.
And that broke matching conditions further. This patch fixes that too
and returns AF_UNSPEC to "all"/"any" address.
Now "default" is treated as top-level prefix (for example 0.0.0.0/0 in
IPv4) and "all"/"any" always matches anything in exact, root and match
modes.
Reported-by: Luca Boccassi <bluca@debian.org>
Signed-off-by: Alexander Zubkov <green@msu.ru>
Conflicts:
bridge/mdb.c
Updated bridge/bridge.c per removal of check_if_color_enabled by commit
1ca4341d2c ("color: disable color when json output is requested")
Signed-off-by: David Ahern <dsahern@gmail.com>
This reverts commit 9135c4d603.
Debian maintainer found that basic command:
# ip route flush all
No longer worked as expected which breaks user scripts and
expectations. It no longer flushed all IPv4 routes.
Reported-by: Luca Boccassi <bluca@debian.org>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
There is a couple of places where we report error in case of no network
device is found. In all of them we output message in the same format to
stderr and either return -1 or 1 to the caller or exit with -1.
Introduce new helper function nodev() that takes name of the network
device caused error and returns -1 to it's caller. Either call exit()
or return to the caller to preserve behaviour before change.
Use -nodev() in traffic control (tc) code to return 1.
Simplify expression for checking for argument being 0/NULL in @if
statement.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
William reported ip hanging and bisected to a recent commit for batching
allowing more than 1 command to be sent per message. The loop over
recvmsg should never cycle more than iovlen times -- 1 response for
each command in the message.
Fixes: 72a2ff3916 ("lib/libnetlink: Add a new function rtnl_talk_iov")
Signed-off-by: David Ahern <dsahern@gmail.com>
It's useful to be able to tell which section is being processed in the
ELF when this error is triggered, so print that detail.
Signed-off-by: Joe Stringer <joe@wand.net.nz>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
The vxlan driver when a neighbor add/delete event occurs sends
NDA_DST filled with a union:
union vxlan_addr {
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr sa;
};
This eventually calls rt_addr_n2a_r which had no handler for the
AF_BRIDGE family and "???" was being printed.
Add code to properly display this data when requested.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Instead of declaring -color and -json exclusive, ignore -color when
-json is provided. The rationale is to allow to put -color in an alias
for ip while still being able to use -json. -color is merely a
presentation suggestion and we can assume there is nothing to color in
the JSON output.
Signed-off-by: Vincent Bernat <vincent@bernat.im>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
It will fail with EPERM on Linux 4.15.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Even in brief mode the interface name should be printed
in color if desired. This makes output consistent across
regular and brief mode.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
There is at least three places implementing same things: two in
ipaddress.c print_linkinfo() & print_linkinfo_brief() and one in
bridge/link.c.
They are diverge from each other very little: bridge/link.c does not
support JSON output at the moment and print_linkinfo_brief() does not
handle IFLA_LINK_NETNS case.
Introduce and use print_name_and_link() routine to handle name@link
output in all possible variations; respect IFLA_LINK_NETNS attribute to
handle case when link is in different namespace; use ll_idx_n2a() for
interface name instead of "<nil>" to share logic with other code (e.g.
ll_name_to_index() and ll_index_to_name()) supporting such template.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Be consistent in handling of IFLA_IFNAME attribute in all places: if
there is no attribute report bug to stderr and use ll_idx_n2a() as
last measure to get name in "if%u" format instead of "<nil>".
Use check_ifname() to validate network device name: this catches both
unexpected return from kernel and ll_idx_n2a().
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Neither internal libnetlink nor libgenl depends on ll_map.o: prepare for
upcoming changes that brings much more cleaner dependency between
utils.o and ll_map.o.
However ll_map.o depends on libnetlink.o functions so we need to provide
libnetlink.a after libutil.a in LIBNETLINK at global Makefile.
Tested using make clean && make -j4. No problems so far.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Now all users of ll_idx_n2a() replaced with ll_index_to_name() we can
move it's functionality to ll_index_to_name() and implement index to
name conversion using snprintf() and "if%u".
Use %u specifier in "if%..." template consistently: network device
indexes are always greather than zero.
Also introduce ll_idx_n2a() conterpart: ll_idx_a2n() that is used
to translate name of the "if%u" form to index using sscanf().
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
After commit a233caa0aa ("json: make pretty printing optional") I get
following build failure:
LINK rtmon
../lib/libutil.a(json_print.o): In function `new_json_obj':
json_print.c:(.text+0x35): undefined reference to `show_pretty'
collect2: error: ld returned 1 exit status
make[1]: *** [rtmon] Error 1
make: *** [all] Error 2
It is caused by missing show_pretty variable in rtmon.
On the other hand tc/tc.c there are two distinct variables and single
matches() call that handles -pretty option thus setting show_pretty
will never happen. Note that since commit 44dcfe8201 ("Change
formatting of u32 back to default") show_pretty is used in tc/f_u32.c
so this is first place where -pretty introduced.
Furthermore other utilities like misc/ifstat.c and misc/nstat.c define
pretty variable, however only for their own purposes. They both support
JSON output and thus depend show_pretty in new_json_obj().
Assuming above use common variable to represent -pretty option, define
it in utils.c and declare in utils.h that is commonly used. Replace
show_pretty with pretty.
Fixes: a233caa0aa ("json: make pretty printing optional")
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
The json print library was toggling pretty print at the end of
an array to workaround a bug in underlying json_writer.
Instead, just fix json_writer to pretty print array correctly.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
Since JSON is intended for programmatic consumption, it makes
sense for the default output format to be concise as possible.
For programmer and other uses, it is helpful to keep the pretty
whitespace format; therefore enable it with -p flag.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
Assume all statistics in ip(8) represented either by IFLA_STATS64 or
IFLA_STATS is 64 bit. It is clean that we can store __u32 counters of
@struct rtnl_link_stats in __u64 counters in @struct rtnl_link_stats64.
New get_rtnl_link_stats_rta() follows __print_link_stats() behaviour on
handling of stats attribute: copy no more than size of data structure
and no less than attribute length zeroing rest.
Drop print_link_stats32() as it's functionality can be handled by 64bit
variant. Move code from __print_link_stats() to print_link_stats64() and
finally rename print_link_stats64() to __print_link_stats().
More users of introduced function will come in future.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Make JSON output work with RED Qdiscs. Float/double printing
helpers have to be added/uncommented to print the probability.
Since TC stats in general are not split out to a separate object
the xstats printed by this patch are not separated either.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
First is used to get address from netlink attribute to
inet_prefix data structure. Use memcpy() with constant
value to let complier optimize by replacing a call by
inlining load/store instructions.
Second is used to match address in given netlink attribute
with one given as reference. It matches successfully if
no attribute is given (@rta is NULL), reference address
family is AF_UNSPEC or it's length isn't given; fails if
get_attr_rta() can't get attribute or it's family does
not match reference; calls inet_addr_match() to get final
verdict.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Both geneve and vxlan modules are converted to
use get_addr() we can replace inet_get_addr()
in less problematic places and finally get
rid of inet_get_addr().
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
