ss: fix NULL pointer access when parsing unix sockets with oldformat
When parsing and printing the unix sockets in unix_show(),
if the oldformat is detected, the peer_name member of the sockstat
object is left uninitialized (NULL).
For this reason, if a filter has been specified on the command line,
a strcmp() will crash when trying to access it.
Avoid crash by checking that peer_name is not NULL before
passing it to strcmp().
Cc: Stefano Brivio <sbrivio@redhat.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Antonio Quartulli <a@unstable.cc> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
When the first header field is disabled (i.e. when passing the -t
option), field_flush() is invoked with the `buffer` global variable
still zero'd.
However, in field_flush() we try to access buffer.cur->len
during variables initialization, thus leading to a SIGSEGV.
It's interesting to note that this bug appears only when the code
is compiled with -O0, because the compiler is smart
enough to immediately jump to the return statement if optimizations
are enabled and skip the faulty instruction.
Cc: Stefano Brivio <sbrivio@redhat.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
David Ahern [Sat, 6 Jan 2018 03:42:05 +0000 (19:42 -0800)]
Restore --no-print-directory option for silent builds
Commit 69fed534a533 ("change how Config is used in Makefile's") removed
Config from Makefile. Config had the checks to set VERBOSE based on user
request and VERBOSE is used to add the --no-print-directory argument.
Since Config is gone, add the relevant setup for VERBOSE to Makefile
to restore quieter builds by default.
Fixes: 69fed534a533 ("change how Config is used in Makefile's") Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Serhey Popovych [Tue, 2 Jan 2018 21:27:58 +0000 (23:27 +0200)]
link_iptnl: Print tunnel mode
Tunnel mode does not appear in parameters print for iptnl
supported tunnels like ipip and sit, while printed for
ip6tnl.
Print tunnel mode as "proto" field name for JSON and
without any name when printing to cli to follow ip6tnl
behaviour.
For non JSON output we have:
$ ip -d link show dev sit1
Before:
-------
17: sit1@NONE: <NOARP> mtu 1480 qdisc noop state DOWN ...
link/sit X.X.X.X brd 0.0.0.0 promiscuity 0
sit remote any local X.X.X.X ...
~~~
After:
------
17: sit1@NONE: <NOARP> mtu 1480 qdisc noop state DOWN ...
link/sit X.X.X.X brd 0.0.0.0 promiscuity 0
sit any remote any local X.X.X.X ...
^^^
devlink, rdma, tipc: properly define TARGETS without HAVE_MNL
Leaving a variable with a generic name such as TARGETS undefined would lead
to Make picking up its value from the environment. Avoid this by always
defining TARGETS in the Makefiles.
Luca Boccassi [Tue, 2 Jan 2018 17:42:16 +0000 (18:42 +0100)]
man: fix small formatting errors
Lintian detected the following formatting errors:
man/man8/devlink-sb.8.gz 230: warning: macro `b' not defined
man/man8/ip-link.8.gz 1243: warning: macro `in-8' not defined
(possibly missing space after `in')
man/man8/tc-u32.8.gz `R' is a string (producing the registered sign),
not a macro.
The filesytem paths to these scripts might be different on various
distros, so don't mention it in the manpages. It is not really useful
information anyway.
Luca Boccassi [Sat, 30 Dec 2017 10:31:15 +0000 (11:31 +0100)]
man: add more keywords to ip.8 short description
A Debian user suggested adding more network-related keywords to the
ip manpage, so that manpage-scraping and indexing software like
apropos can do a better job of categorizing the programs.
Luca Boccassi [Sat, 30 Dec 2017 10:31:14 +0000 (11:31 +0100)]
man: drop references to Debian-specific paths
Documentation should be distribution-agnostic - any specific quirks
should be handled by downstream maintainers, if necessary.
Remove mentions of Debian paths and package names.
Signed-off-by: Luca Boccassi <bluca@debian.org> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Serhey Popovych [Wed, 27 Dec 2017 11:28:15 +0000 (13:28 +0200)]
gre6/tunnel: Do not submit garbage in flowinfo
We always send flowinfo to the kernel. If flowlabel/tclass
was set first to non-inherit value and then reset to
inherit we do not clear flowlabel/tclass part in flowinfo,
send it to kernel and can get from the kernel back.
Even if we check for IP6_TNL_F_USE_ORIG_TCLASS and
IP6_TNL_F_USE_ORIG_FLOWLABEL when printing options
sending invalid flowlabel/tclass to the kernel seems
bad idea.
Note that ip6tnl always clean corresponding flowinfo
parts on inherit.
Serhey Popovych [Wed, 27 Dec 2017 11:28:14 +0000 (13:28 +0200)]
gre,ip6tnl/tunnel: Fix noencap- support
We must clear bit, not set all but given bit.
Fixes: 858dbb208e39 ("ip link: Add support for remote checksum offload to IP tunnels") Fixes: 73516e128a5a ("ip6tnl: Support for fou encapsulation" Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
Serhey Popovych [Wed, 20 Dec 2017 07:57:10 +0000 (09:57 +0200)]
ip/tunnel: No need to free answer after rtnl_talk() on error
Since rtnl_talk() never returns with answer buffer allocated
on error we do not need to release it manually. After this
initializing answer with NULL before rtnl_talk() is useless.
Serhey Popovych [Wed, 20 Dec 2017 07:57:09 +0000 (09:57 +0200)]
utils: ll_addr: Handle ARPHRD_IP6GRE in ll_addr_n2a()
ll_addr_n2a() correctly prints tunnel endpoints for gre, ipip, sit
and ip6tnl, but not for ip6gre. Fix this by adding ARPHRD_IP6GRE to
IPv6 tunnel endpoing address conversion.
Before:
-------
$ ip link show
...
18: ip6tnl0: <NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group default
link/tunnel6 :: brd ::
19: ip6gre0: <NOARP> mtu 1456 qdisc noop state DOWN mode DEFAULT group default
link/gre6 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 brd \
00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
After:
------
$ ip link show
...
18: ip6tnl0: <NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group default
link/tunnel6 :: brd ::
19: ip6gre0: <NOARP> mtu 1456 qdisc noop state DOWN mode DEFAULT group default
link/gre6 :: brd ::
Alexander Zubkov [Sun, 17 Dec 2017 11:09:00 +0000 (12:09 +0100)]
iproute: "list/flush/save default" selected all of the routes
When running "ip route list default" and not specifying address family,
one will get all of the routes instead of just default only. The same
is for "exact default" and "match default".
It behaves in such a way because default route with unspecified family
has the same all-zeroes value like no prefix specified at all. Thus
following code blindly ignores the fact, that prefix was actually
specified.
This patch adds the flag PREFIXLEN_SPECIFIED to the default route too.
And then checks its value when filtering routes.
Signed-off-by: Alexander Zubkov <green@msu.ru> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Alexander Zubkov [Sun, 17 Dec 2017 12:02:11 +0000 (13:02 +0100)]
iproute: list/flush/save filter also by metric
Metric is one of the "unique key" fields of the route in Linux. But
still one can not use its value in filter while running ip list.
Because of this writing checks in scripts for example is incovenient.
Signed-off-by: Alexander Zubkov <green@msu.ru> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
All tunnels already support for parsing/adding zero
endpoints and vti6 isn't an exception.
This check was added as part of commit 2a80154fde40
(vti6: fix local/remote any addr handling) and looks
too restrictive as purpose of change is to avoid
endpoint configuration from uninitialized data.
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Serhey Popovych [Mon, 18 Dec 2017 17:48:04 +0000 (19:48 +0200)]
link_ip6tnl: Use IN6ADDR_ANY_INIT to initialize local/remote endpoints
Use specialized helper to initialize endpoint addresses with
zeros instead of open coding this. This unifies initialization
style with other ipv6 tunnel variants (i.e. gre6 and vti6).
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Serhey Popovych [Mon, 18 Dec 2017 17:48:03 +0000 (19:48 +0200)]
ip/tunnel: Use tnl_parse_key() to parse tunnel key
It is added with
commit a7ed1520ee96 ("ip/tunnel: introduce tnl_parse_key()")
to avoid code duplication in ip6?tunnel.c.
Reuse it for gre/gre6 and vti/vti6 tunnel rtnl
configuration interface with the same purpose
it is used in tunnel ioctl interface in ip6?tunnel.c.
While there change type of key variables from
unsigned integer to __be32 to reflect nature of the
value they store and place error message in
tnl_parse_key() on a single line to make single
call to fprintf().
Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Serhey Popovych [Wed, 13 Dec 2017 19:36:01 +0000 (21:36 +0200)]
ip/tunnel: Use get_addr() instead of get_prefix() for local/remote endpoints
Manual page ip-link(8) states that both local and remote accept
IPADDR not PREFIX. Use get_addr() instead of get_prefix() to
parse local/remote endpoint address correctly.
Force corresponding address family instead of using preferred_family
to catch weired cases as shown below.
Before this patch it is possible to create tunnel with commands:
ip li add dev ip6gre2 type ip6gre local fe80::1/64 remote fe80::2/64
ip -4 li add dev ip6gre2 type ip6gre local 10.0.0.1/24 remote 10.0.0.2/24
Serhey Popovych [Wed, 13 Dec 2017 19:36:00 +0000 (21:36 +0200)]
ip/tunnel: Unify setup and accept zero address for local/remote endpoints
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.
Oliver Hartkopp [Sat, 16 Dec 2017 11:38:57 +0000 (12:38 +0100)]
ip: add vxcan/veth to ip-link man page
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>
Roman Mashak [Fri, 15 Dec 2017 14:27:42 +0000 (09:27 -0500)]
ss: add missing path MTU parameter
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>
Chris Mi [Thu, 14 Dec 2017 09:09:00 +0000 (18:09 +0900)]
tc: fix command "tc actions del" hang issue
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: 86bf43c7c2fd ("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>
Stefano Brivio [Tue, 12 Dec 2017 00:46:33 +0000 (01:46 +0100)]
ss: Implement automatic column width calculation
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
Stefano Brivio [Tue, 12 Dec 2017 00:46:32 +0000 (01:46 +0100)]
ss: Buffer raw fields first, then render them as a table
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
Stefano Brivio [Tue, 12 Dec 2017 00:46:31 +0000 (01:46 +0100)]
ss: Introduce columns lightweight abstraction
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.
Stefano Brivio [Tue, 12 Dec 2017 00:46:30 +0000 (01:46 +0100)]
ss: Replace printf() calls for "main" output by calls to helper
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.
Phil Sutter [Wed, 29 Nov 2017 17:34:09 +0000 (18:34 +0100)]
man: tc-csum.8: Fix inconsistency in example description
Commit 6bbe5e6290db5 ("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: 6bbe5e6290db5 ("man: tc-csum.8: Fix example") Signed-off-by: Phil Sutter <phil@nwl.cc>
Robert Shearman [Tue, 28 Nov 2017 11:16:50 +0000 (11:16 +0000)]
vxlan: Make id optional when modifying a link
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.
Robert Shearman [Tue, 28 Nov 2017 11:16:21 +0000 (11:16 +0000)]
gre: Fix ttl inherit option
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.
Jiri Pirko [Sat, 25 Nov 2017 10:07:57 +0000 (11:07 +0100)]
tc: remove action cookie len from printout
Make the output same as input and avoid printout of unnecessary len.
Suggested-by: Stephen Hemminger <stephen@networkplumber.org> Fixes: fd8b3d2c1b9b ("actions: Add support for user cookies") Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Jakub Kicinski [Fri, 24 Nov 2017 02:12:07 +0000 (18:12 -0800)]
f_bpf: communicate ifindex for eBPF offload
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>
Jakub Kicinski [Fri, 24 Nov 2017 02:12:06 +0000 (18:12 -0800)]
tc_filter: resolve device name before parsing filter
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>
Jakub Kicinski [Fri, 24 Nov 2017 02:12:01 +0000 (18:12 -0800)]
bpf: split parse from program loading
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>
Jakub Kicinski [Fri, 24 Nov 2017 02:12:00 +0000 (18:12 -0800)]
bpf: allocate opcode table in struct bpf_cfg_in
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>
Jakub Kicinski [Fri, 24 Nov 2017 02:11:59 +0000 (18:11 -0800)]
bpf: keep parsed program mode in struct bpf_cfg_in
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>
Jakub Kicinski [Fri, 24 Nov 2017 02:11:58 +0000 (18:11 -0800)]
bpf: pass program type in struct bpf_cfg_in
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>
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.
Tom Herbert [Wed, 22 Nov 2017 20:05:35 +0000 (12:05 -0800)]
ila: support to configure checksum neutral-map-auto
Configuration support in both ip ila and ip LWT for checksum
neutral-map-auto. This is a mode of ILA where checksum
neutral mapping is assumed for packets (there is no C-bit
in the identifier to indicate checksum neutral).
Jakub Kicinski [Thu, 23 Nov 2017 01:00:53 +0000 (17:00 -0800)]
bpf: initialize the verifier log
If program loading fails before verifier prints its first
message, the verifier log will not be initialized. Always
set the first character of the log buffer to zero to make
sure we don't dump non-printable characters to the terminal.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Lorenzo Colitti [Mon, 20 Nov 2017 03:57:07 +0000 (12:57 +0900)]
iproute2: fixes to compile on some systems.
1. Put the declarations of strlcpy and strlcat inside
an #ifdef NEED_STRLCPY. Their declarations were already in a
similar #ifdef.
2. In bpf_scm.h, include sys/un.h for struct sockaddr_un.
3. In utils.h, include time.h for struct timeval.
Tested: builds on ubuntu 14.04 with "make clean distclean; ./configure && make -j64"
Tested: 4.14.1 builds on Android with Android-specific #ifndefs for missing library code Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
projects / mirror_iproute2.git / log