diff options
| author | Craig Gallek <kraig@google.com> | 2016-01-04 17:41:47 -0500 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2022-04-19 00:49:57 +0300 |
| commit | acc4e8388aadd10da210bd56d3ffec8a8a217994 (patch) | |
| tree | 55336db5c9f0b808e437c65ad362afd145f3b1c2 /net/core/sock.c | |
| parent | 6a594c47d15209b49b6d322c89f4e68ece07e5f7 (diff) | |
soreuseport: setsockopt SO_ATTACH_REUSEPORT_[CE]BPF
Expose socket options for setting a classic or extended BPF program
for use when selecting sockets in an SO_REUSEPORT group. These options
can be used on the first socket to belong to a group before bind or
on any socket in the group after bind.
This change includes refactoring of the existing sk_filter code to
allow reuse of the existing BPF filter validation checks.
Signed-off-by: Craig Gallek <kraig@google.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chatur27 <jasonbright2709@gmail.com>
Change-Id: I4433dfd5d865bb69e8d3cab55cc68325829e8b49
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index ffa103957631..f090a1cfb974 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -134,6 +134,7 @@ #include <linux/sock_diag.h> #include <linux/filter.h> +#include <net/sock_reuseport.h> #include <trace/events/sock.h> @@ -934,6 +935,32 @@ set_rcvbuf: } break; + case SO_ATTACH_REUSEPORT_CBPF: + ret = -EINVAL; + if (optlen == sizeof(struct sock_fprog)) { + struct sock_fprog fprog; + + ret = -EFAULT; + if (copy_from_user(&fprog, optval, sizeof(fprog))) + break; + + ret = sk_reuseport_attach_filter(&fprog, sk); + } + break; + + case SO_ATTACH_REUSEPORT_EBPF: + ret = -EINVAL; + if (optlen == sizeof(u32)) { + u32 ufd; + + ret = -EFAULT; + if (copy_from_user(&ufd, optval, sizeof(ufd))) + break; + + ret = sk_reuseport_attach_bpf(ufd, sk); + } + break; + case SO_DETACH_FILTER: ret = sk_detach_filter(sk); break; @@ -1462,6 +1489,8 @@ static void __sk_destruct(struct rcu_head *head) sk_filter_uncharge(sk, filter); RCU_INIT_POINTER(sk->sk_filter, NULL); } + if (rcu_access_pointer(sk->sk_reuseport_cb)) + reuseport_detach_sock(sk); sock_disable_timestamp(sk, SK_FLAGS_TIMESTAMP); |