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BPFTOOL-MAP(8) - Linux man page online | Administration and privileged commands

Tool for inspection and simple manipulation of eBPF maps.

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BPFTOOL-MAP(8) BPFTOOL-MAP(8)

NAME

bpftool-map - tool for inspection and simple manipulation of eBPF maps

SYNOPSIS

bpftool [OPTIONS] map COMMAND OPTIONS := { { -j | --json } [{ -p | --pretty }] | { -f | --bpffs } } 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.

OPTIONS

-h, --help Print short generic help message (similar to bpftool help). -v, --version Print version number (similar to bpftool version). -j, --json Generate JSON output. For commands that cannot produce JSON, this option has no effect. -p, --pretty Generate human-readable JSON output. Implies -j. -f, --bpffs Show file names of pinned maps.

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)
BPFTOOL-MAP(8)
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bpftool-map(8) referred by bpftool(8) | bpftool-prog(8)
refer to bpftool(8) | bpftool-prog(8)
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