b5cb33aec6
Implement missing bpf to bpf calls support. The loader will
recognize .text section and handle relocation entries that
are emitted by LLVM.
First step is processing of map related relocation entries
for .text section, and in a second step loader will copy .text
section into program section and adjust call instruction
offset accordingly.
Example with test_xdp_noinline.o from kernel selftests:
1) Every function as __attribute__ ((always_inline)), rest
left unchanged:
# 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:233 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 dump xlated id 233
[...]
1669: (2d) if r3 > r2 goto pc+4
1670: (79) r2 = *(u64 *)(r10 -136)
1671: (61) r2 = *(u32 *)(r2 +0)
1672: (63) *(u32 *)(r1 +0) = r2
1673: (b7) r0 = 1
1674: (95) exit <-- 1674 insns total
2) Every function as __attribute__ ((noinline)), rest
left unchanged:
# 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:236 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 dump xlated id 236
[...]
1000: (bf) r1 = r6
1001: (b7) r2 = 24
1002: (85) call pc+3 <-- pc-relative call insns
1003: (1f) r7 -= r0
1004: (bf) r0 = r7
1005: (95) exit
1006: (bf) r0 = r1
1007: (bf) r1 = r2
1008: (67) r1 <<= 32
1009: (77) r1 >>= 32
1010: (bf) r3 = r0
1011: (6f) r3 <<= r1
1012: (87) r2 = -r2
1013: (57) r2 &= 31
1014: (67) r0 <<= 32
1015: (77) r0 >>= 32
1016: (7f) r0 >>= r2
1017: (4f) r0 |= r3
1018: (95) exit <-- 1018 insns total
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
|
||
|---|---|---|
| bash-completion | ||
| bridge | ||
| devlink | ||
| doc/actions | ||
| etc/iproute2 | ||
| examples | ||
| genl | ||
| include | ||
| ip | ||
| lib | ||
| man | ||
| misc | ||
| netem | ||
| rdma | ||
| schema | ||
| tc | ||
| testsuite | ||
| tipc | ||
| .gitignore | ||
| COPYING | ||
| Makefile | ||
| README | ||
| README.decnet | ||
| README.devel | ||
| README.distribution | ||
| README.iproute2+tc | ||
| README.lnstat | ||
| configure | ||
README
This is a set of utilities for Linux networking.
Information:
https://wiki.linuxfoundation.org/networking/iproute2
Download:
http://www.kernel.org/pub/linux/utils/net/iproute2/
Stable version repository:
git://git.kernel.org/pub/scm/network/iproute2/iproute2.git
Development repository:
git://git.kernel.org/pub/scm/network/iproute2/iproute2-next.git
How to compile this.
--------------------
1. libdbm
arpd needs to have the berkeleydb development libraries. For Debian
users this is the package with a name like libdbX.X-dev.
DBM_INCLUDE points to the directory with db_185.h which
is the include file used by arpd to get to the old format Berkeley
database routines. Often this is in the db-devel package.
2. make
The makefile will automatically build a config.mk file which
contains definitions of libraries that may or may not be available
on the system such as: ATM, ELF, MNL, and SELINUX.
3. To make documentation, cd to doc/ directory , then
look at start of Makefile and set correct values for
PAGESIZE=a4 , ie: a4 , letter ... (string)
PAGESPERPAGE=2 , ie: 1 , 2 ... (numeric)
and make there. It assumes, that latex, dvips and psnup
are in your path.
4. This package includes matching sanitized kernel headers because
the build environment may not have up to date versions. See Makefile
if you have special requirements and need to point at different
kernel include files.
Stephen Hemminger
stephen@networkplumber.org
Alexey Kuznetsov
kuznet@ms2.inr.ac.ru