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8740ca9dcd
While sock_diag is able to return BPF socket-local storage in response to INET_DIAG_REQ_SK_BPF_STORAGES requests, ss doesn't request it. This change introduces the --bpf-maps and --bpf-map-id= options to request BPF socket-local storage for all SK_STORAGE maps, or only specific ones. The bigger part of this change will check the requested map IDs and ensure they are valid. The column COL_EXT is used to print the socket-local data into. When --bpf-maps is used, ss will send an empty INET_DIAG_REQ_SK_BPF_STORAGES request, in return the kernel will send all the BPF socket-local storage entries for a given socket. The BTF data for each map is loaded on demand, as ss can't predict which map ID are used. When --bpf-map-id=ID is used, a file descriptor to the requested maps is open to 1) ensure the map doesn't disappear before the data is printed, and 2) ensure the map type is BPF_MAP_TYPE_SK_STORAGE. The BTF data for each requested map is loaded before the request is sent to the kernel. Co-developed-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Quentin Deslandes <qde@naccy.de> Signed-off-by: David Ahern <dsahern@kernel.org>
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
David Ahern
dsahern@gmail.com