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| author |   Quentin Monnet <quentin.monnet@netronome.com> | 2018-10-20 23:01:48 +0100 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-10-21 20:45:14 +0200 |
| commit | 882731e06c669a8626f2d4bfb351ca19264be029 (patch) | |
| tree | 28f9023b2e3b3c71e9241980bd254e65182bae2e /tools/bpf/bpftool/Documentation/bpftool-map.rst | |
| parent | selftests/bpf: fix return value comparison for tests in test_libbpf.sh (diff) | |
| download | linux-dev-882731e06c669a8626f2d4bfb351ca19264be029.tar.xz linux-dev-882731e06c669a8626f2d4bfb351ca19264be029.zip | |
tools: bpftool: document restriction on '.' in names to pin in bpffs
Names used to pin eBPF programs and maps under the eBPF virtual file
system cannot contain a dot character, which is reserved for future
extensions of this file system.
Document this in bpftool man pages to avoid users getting confused if
pinning fails because of a dot.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf/bpftool/Documentation/bpftool-map.rst')
| -rw-r--r-- | tools/bpf/bpftool/Documentation/bpftool-map.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst index 3497f2d80328..f55a2daed59b 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-map.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst @@ -86,7 +86,9 @@ DESCRIPTION **bpftool map pin** *MAP* *FILE* Pin map *MAP* as *FILE*. - Note: *FILE* must be located in *bpffs* mount. + Note: *FILE* must be located in *bpffs* mount. It must not + contain a dot character ('.'), which is reserved for future + extensions of *bpffs*. **bpftool** **map event_pipe** *MAP* [**cpu** *N* **index** *M*] Read events from a BPF_MAP_TYPE_PERF_EVENT_ARRAY map. |