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| author | Lorenz Bauer <[email protected]> | 2020-09-09 16:27:11 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <[email protected]> | 2020-09-10 19:31:55 +0000 |
| commit | 0365351524d7560d8ed7a42801a15252c6c56f41 (patch) | |
| tree | 7fd76c80163d4dc5a5a439e3c4ce7603c6dd0965 /tools/testing/selftests/bpf/prog_tests/sockmap_basic.c | |
| parent | net: sockmap: Remove unnecessary sk_fullsock checks (diff) | |
| download | kernel-0365351524d7560d8ed7a42801a15252c6c56f41.tar.gz kernel-0365351524d7560d8ed7a42801a15252c6c56f41.zip | |
net: Allow iterating sockmap and sockhash
Add bpf_iter support for sockmap / sockhash, based on the bpf_sk_storage and
hashtable implementation. sockmap and sockhash share the same iteration
context: a pointer to an arbitrary key and a pointer to a socket. Both
pointers may be NULL, and so BPF has to perform a NULL check before accessing
them. Technically it's not possible for sockhash iteration to yield a NULL
socket, but we ignore this to be able to use a single iteration point.
Iteration will visit all keys that remain unmodified during the lifetime of
the iterator. It may or may not visit newly added ones.
Switch from using rcu_dereference_raw to plain rcu_dereference, so we gain
another guard rail if CONFIG_PROVE_RCU is enabled.
Signed-off-by: Lorenz Bauer <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/sockmap_basic.c')
0 files changed, 0 insertions, 0 deletions