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| author | Stanislav Fomichev <sdf@google.com> | 2020-07-06 16:01:25 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-07-08 01:03:31 +0200 |
| commit | f5836749c9c04a10decd2742845ad4870965fdef (patch) | |
| tree | 44335764c2ebba2099ba8bf26267bdfac7c36ed1 /net/core/filter.c | |
| parent | 4e48978cd28ce51945c08650e5c5502ca41e1fcc (diff) | |
| download | linux-stable-f5836749c9c04a10decd2742845ad4870965fdef.tar.gz linux-stable-f5836749c9c04a10decd2742845ad4870965fdef.tar.bz2 linux-stable-f5836749c9c04a10decd2742845ad4870965fdef.zip | |
bpf: Add BPF_CGROUP_INET_SOCK_RELEASE hook
Sometimes it's handy to know when the socket gets freed. In
particular, we'd like to try to use a smarter allocation of
ports for bpf_bind and explore the possibility of limiting
the number of SOCK_DGRAM sockets the process can have.
Implement BPF_CGROUP_INET_SOCK_RELEASE hook that triggers on
inet socket release. It triggers only for userspace sockets
(not in-kernel ones) and therefore has the same semantics as
the existing BPF_CGROUP_INET_SOCK_CREATE.
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200706230128.4073544-2-sdf@google.com
Diffstat (limited to 'net/core/filter.c')
| -rw-r--r-- | net/core/filter.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index c5e696e6c315..ddcc0d6209e1 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -6890,6 +6890,7 @@ static bool __sock_filter_check_attach_type(int off, case offsetof(struct bpf_sock, priority): switch (attach_type) { case BPF_CGROUP_INET_SOCK_CREATE: + case BPF_CGROUP_INET_SOCK_RELEASE: goto full_access; default: return false; |