Documentation/bpf/maps.rst

8 hash, array, bloom filter and radix-tree. Several of the map types exist to
11 `man-pages`_ for `bpf-helpers(7)`_.
15 More details of the BPF syscall are available in `ebpf-syscall`_ and in the
16 `man-pages`_ for `bpf(2)`_.
41 .. code-block:: c
55 Returns a process-local file descriptor on success, or negative error in case of
59 .. note:: Valid characters for ``map_name`` are ``A-Z``, ``a-z``, ``0-9``,
64 Lookup key in a given map using ``attr->map_fd``, ``attr->key``,
65 ``attr->value``. Returns zero and stores found elem into ``attr->value`` on
70 Create or update key/value pair in a given map using ``attr->map_fd``, ``attr->key``,
71 ``attr->value``. Returns zero on success or negative error on failure.
75 Find and delete element by key in a given map using ``attr->map_fd``,
76 ``attr->key``. Returns zero on success or negative error on failure.
79 .. _man-pages: https://www.kernel.org/doc/man-pages/  target in Usage Notes
80 .. _bpf(2): https://man7.org/linux/man-pages/man2/bpf.2.html
81 .. _bpf-helpers(7): https://man7.org/linux/man-pages/man7/bpf-helpers.7.html
82 .. _ebpf-syscall: https://docs.kernel.org/userspace-api/ebpf/syscall.html