litmus-rt.git/tools/net, branch master The LITMUS^RT kernel. tools: bpf_jit_disasm: fix segfault on disabled debugging log output 2015-05-27T04:24:10+00:00 Daniel Borkmann daniel@iogearbox.net 2015-05-25T12:08:03+00:00 082739aa458a74add9a2362988e5aca0367bfa53 With recent debugging, I noticed that bpf_jit_disasm segfaults when there's no debugging output from the JIT compiler to the kernel log. Reason is that when regexec(3) doesn't match on anything, start/end offsets are not being filled out and contain some uninitialized garbage from stack. Thus, we need zero out offsets first. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net> 
With recent debugging, I noticed that bpf_jit_disasm segfaults when
there's no debugging output from the JIT compiler to the kernel log.

Reason is that when regexec(3) doesn't match on anything, start/end
offsets are not being filled out and contain some uninitialized garbage
from stack. Thus, we need zero out offsets first.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
tools: bpf_asm: cleanup vlan extension related token 2015-03-25T01:21:41+00:00 Daniel Borkmann daniel@iogearbox.net 2015-03-24T22:19:24+00:00 835c3d9b7a28f5ecfc2dea2300946e27811f16a5 We now have K_VLANT, K_VLANP and K_VLANTPID. Clean them up into more descriptive token, namely K_VLAN_TCI, K_VLAN_AVAIL and K_VLAN_TPID. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net> 
We now have K_VLANT, K_VLANP and K_VLANTPID. Clean them up into more
descriptive token, namely K_VLAN_TCI, K_VLAN_AVAIL and K_VLAN_TPID.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
filter: introduce SKF_AD_VLAN_TPID BPF extension 2015-03-24T19:25:15+00:00 Michal Sekletar msekleta@redhat.com 2015-03-24T13:48:41+00:00 27cd5452476978283decb19e429e81fc6c71e74b If vlan offloading takes place then vlan header is removed from frame and its contents, both vlan_tci and vlan_proto, is available to user space via TPACKET interface. However, only vlan_tci can be used in BPF filters. This commit introduces a new BPF extension. It makes possible to load the value of vlan_proto (vlan TPID) to register A. Support for classic BPF and eBPF is being added, analogous to skb->protocol. Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Jiri Pirko <jpirko@redhat.com> Signed-off-by: Michal Sekletar <msekleta@redhat.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Reviewed-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net> 
If vlan offloading takes place then vlan header is removed from frame
and its contents, both vlan_tci and vlan_proto, is available to user
space via TPACKET interface. However, only vlan_tci can be used in BPF
filters.

This commit introduces a new BPF extension. It makes possible to load
the value of vlan_proto (vlan TPID) to register A. Support for classic
BPF and eBPF is being added, analogous to skb->protocol.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Jiri Pirko <jpirko@redhat.com>

Signed-off-by: Michal Sekletar <msekleta@redhat.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
tools: bpf_jit_disasm: increase image buffer size 2014-05-16T20:44:08+00:00 Alexei Starovoitov ast@plumgrid.com 2014-05-15T22:56:39+00:00 9bb1a208fddda94ea3c6df1fc9a225f92761cf1c JITed seccomp filters can be quite large if they check a lot of syscalls Simply increase buffer size Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
JITed seccomp filters can be quite large if they check a lot of syscalls
Simply increase buffer size

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
tools: bpf_jit_disasm: ignore image address for disasm 2014-05-16T20:44:08+00:00 Alexei Starovoitov ast@plumgrid.com 2014-05-15T22:56:38+00:00 ed4afd451f12ea57f9aaaf6f8442eee7e415fa1a seccomp filters use kernel JIT image addresses, so bpf_jit_enable=2 prints [ 20.146438] flen=3 proglen=82 pass=0 image=0000000000000000 [ 20.146442] JIT code: 00000000: 55 48 89 e5 48 81 ec 28 02 00 00 ... ignore image address, so that seccomp filters can be disassembled Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
seccomp filters use kernel JIT image addresses, so bpf_jit_enable=2 prints
[ 20.146438] flen=3 proglen=82 pass=0 image=0000000000000000
[ 20.146442] JIT code: 00000000: 55 48 89 e5 48 81 ec 28 02 00 00 ...

ignore image address, so that seccomp filters can be disassembled

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-05-12T17:19:14+00:00 David S. Miller davem@davemloft.net 2014-05-12T17:19:14+00:00 5f013c9bc70214dcacd5fbed5a06c217d6ff9c59 Conflicts: drivers/net/ethernet/altera/altera_sgdma.c net/netlink/af_netlink.c net/sched/cls_api.c net/sched/sch_api.c The netlink conflict dealt with moving to netlink_capable() and netlink_ns_capable() in the 'net' tree vs. supporting 'tc' operations in non-init namespaces. These were simple transformations from netlink_capable to netlink_ns_capable. The Altera driver conflict was simply code removal overlapping some void pointer cast cleanups in net-next. Signed-off-by: David S. Miller <davem@davemloft.net> 
Conflicts:
	drivers/net/ethernet/altera/altera_sgdma.c
	net/netlink/af_netlink.c
	net/sched/cls_api.c
	net/sched/sch_api.c

The netlink conflict dealt with moving to netlink_capable() and
netlink_ns_capable() in the 'net' tree vs. supporting 'tc' operations
in non-init namespaces.  These were simple transformations from
netlink_capable to netlink_ns_capable.

The Altera driver conflict was simply code removal overlapping some
void pointer cast cleanups in net-next.

Signed-off-by: David S. Miller <davem@davemloft.net>
bpf_dbg: fix wrong register usage 2014-04-30T20:12:22+00:00 Brendan Hickey bhickey@google.com 2014-04-30T08:24:38+00:00 e5744fe9d262d11131916d04ea79ea539fe296c0 The AND instruction is erroneously using the X register instead of the K register. Signed-off-by: Brendan Hickey <bhickey@google.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
The AND instruction is erroneously using the X register instead
of the K register.

Signed-off-by: Brendan Hickey <bhickey@google.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
filter: added BPF random opcode 2014-04-23T01:27:57+00:00 Chema Gonzalez chema@google.com 2014-04-21T16:21:24+00:00 4cd3675ebf74d7f559038ded6aa8088e4099a83d Added a new ancillary load (bpf call in eBPF parlance) that produces a 32-bit random number. We are implementing it as an ancillary load (instead of an ISA opcode) because (a) it is simpler, (b) allows easy JITing, and (c) seems more in line with generic ISAs that do not have "get a random number" as a instruction, but as an OS call. The main use for this ancillary load is to perform random packet sampling. Signed-off-by: Chema Gonzalez <chema@google.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Added a new ancillary load (bpf call in eBPF parlance) that produces
a 32-bit random number. We are implementing it as an ancillary load
(instead of an ISA opcode) because (a) it is simpler, (b) allows easy
JITing, and (c) seems more in line with generic ISAs that do not have
"get a random number" as a instruction, but as an OS call.

The main use for this ancillary load is to perform random packet sampling.

Signed-off-by: Chema Gonzalez <chema@google.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-03-15T02:31:55+00:00 David S. Miller davem@davemloft.net 2014-03-15T02:31:55+00:00 85dcce7a73f1cc59f7a96fe52713b1630f4ca272 Conflicts: drivers/net/usb/r8152.c drivers/net/xen-netback/netback.c Both the r8152 and netback conflicts were simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net> 
Conflicts:
	drivers/net/usb/r8152.c
	drivers/net/xen-netback/netback.c

Both the r8152 and netback conflicts were simple overlapping
changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
tools/net/Makefile: Define PACKAGE to fix build problems 2014-03-12T04:07:55+00:00 Markos Chandras markos.chandras@imgtec.com 2014-03-11T08:49:39+00:00 406764622fb71e5f4efb39ff111ef87713815f6d Fixes the following build problem with binutils-2.24 gcc -Wall -O2 -c -o bpf_jit_disasm.o bpf_jit_disasm.c In file included from bpf_jit_disasm.c:25:0: /usr/include/bfd.h:35:2: error: #error config.h must be included before this header #error config.h must be included before this header This is similar to commit 3ce711a6abc27abce1554e1d671a8762b7187690 "perf tools: bfd.h/libbfd detection fails with recent binutils" See: https://sourceware.org/bugzilla/show_bug.cgi?id=14243 CC: David S. Miller <davem@davemloft.net> CC: Daniel Borkmann <dborkman@redhat.com> CC: netdev@vger.kernel.org Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Fixes the following build problem with binutils-2.24

gcc -Wall -O2   -c -o bpf_jit_disasm.o bpf_jit_disasm.c
In file included from bpf_jit_disasm.c:25:0:
/usr/include/bfd.h:35:2: error: #error config.h must be included
before this header
 #error config.h must be included before this header

This is similar to commit 3ce711a6abc27abce1554e1d671a8762b7187690
"perf tools: bfd.h/libbfd detection fails with recent binutils"

See: https://sourceware.org/bugzilla/show_bug.cgi?id=14243

CC: David S. Miller <davem@davemloft.net>
CC: Daniel Borkmann <dborkman@redhat.com>
CC: netdev@vger.kernel.org
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>