diff options
| author | Martin Kelly <martin.kelly@crowdstrike.com> | 2023-09-25 14:50:42 -0700 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2023-09-25 16:22:43 -0700 |
| commit | ae769390377adaec2798bd1a69171f00d0a25be0 (patch) | |
| tree | d871b46e6aecdf6713851c91925f019eb93f90dd | |
| parent | bb32dd2c8fec71990bbc231aac934e1c73a17341 (diff) | |
libbpf: Add ring__map_fd
Add ring__map_fd to get the file descriptor underlying a given
ringbuffer.
Signed-off-by: Martin Kelly <martin.kelly@crowdstrike.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230925215045.2375758-12-martin.kelly@crowdstrike.com
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 9 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 1 | ||||
| -rw-r--r-- | tools/lib/bpf/ringbuf.c | 5 |
3 files changed, 15 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 53e2a645c560..114e306c6507 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -1303,6 +1303,15 @@ LIBBPF_API size_t ring__avail_data_size(const struct ring *r); */ LIBBPF_API size_t ring__size(const struct ring *r); +/** + * @brief **ring__map_fd()** returns the file descriptor underlying the given + * ringbuffer. + * + * @param r A ringbuffer object. + * @return The underlying ringbuffer file descriptor + */ +LIBBPF_API int ring__map_fd(const struct ring *r); + struct user_ring_buffer_opts { size_t sz; /* size of this struct, for forward/backward compatibility */ }; diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index a116d0bb3c5d..1b4225327ab6 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -402,6 +402,7 @@ LIBBPF_1.3.0 { bpf_program__attach_uprobe_multi; ring__avail_data_size; ring__consumer_pos; + ring__map_fd; ring__producer_pos; ring__size; ring_buffer__ring; diff --git a/tools/lib/bpf/ringbuf.c b/tools/lib/bpf/ringbuf.c index 98d0767dbb50..8aec20216b7b 100644 --- a/tools/lib/bpf/ringbuf.c +++ b/tools/lib/bpf/ringbuf.c @@ -366,6 +366,11 @@ size_t ring__size(const struct ring *r) return r->mask + 1; } +int ring__map_fd(const struct ring *r) +{ + return r->map_fd; +} + static void user_ringbuf_unmap_ring(struct user_ring_buffer *rb) { if (rb->consumer_pos) { |