111 lines
2.8 KiB
ReStructuredText
111 lines
2.8 KiB
ReStructuredText
|
================
|
||
|
|
bpftool-map
|
||
|
|
================
|
||
|
|
-------------------------------------------------------------------------------
|
||
|
|
tool for inspection and simple manipulation of eBPF maps
|
||
|
|
-------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
:Manual section: 8
|
||
|
|
|
||
|
|
SYNOPSIS
|
||
|
|
========
|
||
|
|
|
||
|
|
**bpftool** **map** *COMMAND*
|
||
|
|
|
||
|
|
*COMMANDS* :=
|
||
|
|
{ show | dump | update | lookup | getnext | delete | pin | help }
|
||
|
|
|
||
|
|
MAP COMMANDS
|
||
|
|
=============
|
||
|
|
|
||
|
|
| **bpftool** map show [*MAP*]
|
||
|
|
| **bpftool** map dump *MAP*
|
||
|
|
| **bpftool** map update *MAP* key *BYTES* value *VALUE* [*UPDATE_FLAGS*]
|
||
|
|
| **bpftool** map lookup *MAP* key *BYTES*
|
||
|
|
| **bpftool** map getnext *MAP* [key *BYTES*]
|
||
|
|
| **bpftool** map delete *MAP* key *BYTES*
|
||
|
|
| **bpftool** map pin *MAP* *FILE*
|
||
|
|
| **bpftool** map help
|
||
|
|
|
|
||
|
|
| *MAP* := { id MAP_ID | pinned FILE }
|
||
|
|
| *VALUE* := { BYTES | MAP | PROGRAM }
|
||
|
|
| *UPDATE_FLAGS* := { any | exist | noexist }
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
===========
|
||
|
|
**bpftool map show** [*MAP*]
|
||
|
|
Show information about loaded maps. If *MAP* is specified
|
||
|
|
show information only about given map, otherwise list all
|
||
|
|
maps currently loaded on the system.
|
||
|
|
|
||
|
|
Output will start with map ID followed by map type and
|
||
|
|
zero or more named attributes (depending on kernel version).
|
||
|
|
|
||
|
|
**bpftool map dump** *MAP*
|
||
|
|
Dump all entries in a given *MAP*.
|
||
|
|
|
||
|
|
**bpftool map update** *MAP* **key** *BYTES* **value** *VALUE* [*UPDATE_FLAGS*]
|
||
|
|
Update map entry for a given *KEY*.
|
||
|
|
|
||
|
|
*UPDATE_FLAGS* can be one of: **any** update existing entry
|
||
|
|
or add if doesn't exit; **exist** update only if entry already
|
||
|
|
exists; **noexist** update only if entry doesn't exist.
|
||
|
|
|
||
|
|
**bpftool map lookup** *MAP* **key** *BYTES*
|
||
|
|
Lookup **key** in the map.
|
||
|
|
|
||
|
|
**bpftool map getnext** *MAP* [**key** *BYTES*]
|
||
|
|
Get next key. If *key* is not specified, get first key.
|
||
|
|
|
||
|
|
**bpftool map delete** *MAP* **key** *BYTES*
|
||
|
|
Remove entry from the map.
|
||
|
|
|
||
|
|
**bpftool map pin** *MAP* *FILE*
|
||
|
|
Pin map *MAP* as *FILE*.
|
||
|
|
|
||
|
|
Note: *FILE* must be located in *bpffs* mount.
|
||
|
|
|
||
|
|
**bpftool map help**
|
||
|
|
Print short help message.
|
||
|
|
|
||
|
|
EXAMPLES
|
||
|
|
========
|
||
|
|
**# bpftool map show**
|
||
|
|
::
|
||
|
|
|
||
|
|
10: hash name some_map flags 0x0
|
||
|
|
key 4B value 8B max_entries 2048 memlock 167936B
|
||
|
|
|
||
|
|
**# bpftool map update id 10 key 13 00 07 00 value 02 00 00 00 01 02 03 04**
|
||
|
|
|
||
|
|
**# bpftool map lookup id 10 key 0 1 2 3**
|
||
|
|
|
||
|
|
::
|
||
|
|
|
||
|
|
key: 00 01 02 03 value: 00 01 02 03 04 05 06 07
|
||
|
|
|
||
|
|
|
||
|
|
**# bpftool map dump id 10**
|
||
|
|
::
|
||
|
|
|
||
|
|
key: 00 01 02 03 value: 00 01 02 03 04 05 06 07
|
||
|
|
key: 0d 00 07 00 value: 02 00 00 00 01 02 03 04
|
||
|
|
Found 2 elements
|
||
|
|
|
||
|
|
**# bpftool map getnext id 10 key 0 1 2 3**
|
||
|
|
::
|
||
|
|
|
||
|
|
key:
|
||
|
|
00 01 02 03
|
||
|
|
next key:
|
||
|
|
0d 00 07 00
|
||
|
|
|
||
|
|
|
|
||
|
|
| **# mount -t bpf none /sys/fs/bpf/**
|
||
|
|
| **# bpftool map pin id 10 /sys/fs/bpf/map**
|
||
|
|
| **# bpftool map del pinned /sys/fs/bpf/map key 13 00 07 00**
|
||
|
|
|
||
|
|
SEE ALSO
|
||
|
|
========
|
||
|
|
**bpftool**\ (8), **bpftool-prog**\ (8)
|