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Andrea Claudi 2f5825cb38 lib: bpf_legacy: fix bpffs mount when /sys/fs/bpf exists 
bpf selftests using iproute2 fails with:

$ ip link set dev veth0 xdp object ../bpf/xdp_dummy.o section xdp_dummy
Continuing without mounted eBPF fs. Too old kernel?
mkdir (null)/globals failed: No such file or directory
Unable to load program

This happens when the /sys/fs/bpf directory exists. In this case, mkdir
in bpf_mnt_check_target() fails with errno == EEXIST, and the function
returns -1. Thus bpf_get_work_dir() does not call bpf_mnt_fs() and the
bpffs is not mounted.

Fix this in bpf_mnt_check_target(), returning 0 when the mountpoint
exists.

Fixes: d4fcdbbec9 ("lib/bpf: Fix and simplify bpf_mnt_check_target()")
Reported-by: Mingyu Shi <mshi@redhat.com>
Reported-by: Jiri Benc <jbenc@redhat.com>
Suggested-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
 		2021-09-22 17:30:52 -07:00
bash-completion devlink: add support for port params get/set 2021-02-11 09:21:24 -07:00
bridge bridge: fdb: don't colorize the "dev" & "dst" keywords in "bridge -c fdb" 2021-08-18 14:04:53 -07:00
dcb dcb: fix memory leak 2021-05-06 14:48:02 +00:00
devlink devlink: Show port state values in man page and in the help command 2021-08-11 15:02:30 -07:00
doc/actions doc: remove trailing whitespace 2018-12-19 12:02:38 -08:00
etc/iproute2 Add Open/R to rt_protos 2021-03-30 03:04:09 +00:00
examples/bpf examples/bpf: add bpf examples with BTF defined maps 2020-11-24 22:14:08 -07:00
genl genl: ctrl: print op -> policy idx mapping 2020-10-11 20:10:09 -06:00
include uapi: updates from 5.15-rc1 2021-09-13 15:07:58 -07:00
ip iptuntap: fix multi-queue flag display 2021-09-02 08:41:17 -07:00
lib lib: bpf_legacy: fix bpffs mount when /sys/fs/bpf exists 2021-09-22 17:30:52 -07:00
man man: ip-link: remove double of 2021-09-02 08:40:36 -07:00
misc ss: fix fallback to procfs for raw sockets 2021-08-18 15:03:46 -07:00
netem doc: remove trailing whitespace 2018-12-19 12:02:38 -08:00
rdma rdma: Add copy-on-fork to get sys command 2021-05-03 14:43:13 +00:00
schema bridge: add json schema for bridge fdb show 2016-07-20 12:02:02 -07:00
tc tc/f_flower: fix port range parsing 2021-09-22 17:28:48 -07:00
testsuite testsuite: Add mpls packet matching tests for tc flower 2020-12-16 04:14:26 +00:00
tipc tipc: bail out if key is abnormally long 2021-05-09 22:08:47 +00:00
vdpa vdpa: add .gitignore 2021-02-23 23:12:14 -08:00
.clang-format clang-format: add configuration file 2019-01-17 13:38:23 -08:00
.gitignore Remove leftovers from removed Latex documentation 2018-02-13 16:43:19 -08:00
.mailmap mailmap: map David's mail address 2019-05-15 09:50:42 -07:00
COPYING Update address of FSF in license 2008-03-08 13:31:03 -08:00
Makefile config.mk: Rerun configure when it is newer than config.mk 2021-05-17 02:13:56 +00:00
README README: remove doc instructions 2021-03-20 09:29:02 -07:00
README.devel README: update location of git repositories, remove broken info link 2018-02-13 16:42:51 -08:00
configure configure: restore backward compatibility 2021-09-02 08:39:48 -07:00

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. include/uapi

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