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authorAlexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>2023-06-08 23:26:26 +0300
committerDavid S. Miller <davem@davemloft.net>2023-06-12 12:45:50 +0300
commit7b26952a91cf65ff1cc867a2382a8964d8c0ee7d (patch)
treebf4a6738d3ed49eb318d70d80cac4e9d00540e4c /net/unix
parent5e2ff6704a275be009be8979af17c52361b79b89 (diff)
downloadlinux-7b26952a91cf65ff1cc867a2382a8964d8c0ee7d.tar.xz
net: core: add getsockopt SO_PEERPIDFD
Add SO_PEERPIDFD which allows to get pidfd of peer socket holder pidfd. This thing is direct analog of SO_PEERCRED which allows to get plain PID. Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Leon Romanovsky <leon@kernel.org> Cc: David Ahern <dsahern@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Kees Cook <keescook@chromium.org> Cc: Christian Brauner <brauner@kernel.org> Cc: Kuniyuki Iwashima <kuniyu@amazon.com> Cc: Lennart Poettering <mzxreary@0pointer.de> Cc: Luca Boccassi <bluca@debian.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Stanislav Fomichev <sdf@google.com> Cc: bpf@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-arch@vger.kernel.org Reviewed-by: Christian Brauner <brauner@kernel.org> Acked-by: Stanislav Fomichev <sdf@google.com> Tested-by: Luca Boccassi <bluca@debian.org> Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix')
-rw-r--r--net/unix/af_unix.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index c46c2f5d860c..73c61a010b01 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -921,11 +921,26 @@ static void unix_unhash(struct sock *sk)
*/
}
+static bool unix_bpf_bypass_getsockopt(int level, int optname)
+{
+ if (level == SOL_SOCKET) {
+ switch (optname) {
+ case SO_PEERPIDFD:
+ return true;
+ default:
+ return false;
+ }
+ }
+
+ return false;
+}
+
struct proto unix_dgram_proto = {
.name = "UNIX",
.owner = THIS_MODULE,
.obj_size = sizeof(struct unix_sock),
.close = unix_close,
+ .bpf_bypass_getsockopt = unix_bpf_bypass_getsockopt,
#ifdef CONFIG_BPF_SYSCALL
.psock_update_sk_prot = unix_dgram_bpf_update_proto,
#endif
@@ -937,6 +952,7 @@ struct proto unix_stream_proto = {
.obj_size = sizeof(struct unix_sock),
.close = unix_close,
.unhash = unix_unhash,
+ .bpf_bypass_getsockopt = unix_bpf_bypass_getsockopt,
#ifdef CONFIG_BPF_SYSCALL
.psock_update_sk_prot = unix_stream_bpf_update_proto,
#endif