diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/sock.c | 33 | ||||
| -rw-r--r-- | net/unix/af_unix.c | 16 |
2 files changed, 49 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index ed4eb4ba738b..ea66b1afadd0 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1758,6 +1758,39 @@ int sk_getsockopt(struct sock *sk, int level, int optname, goto lenout; } + case SO_PEERPIDFD: + { + struct pid *peer_pid; + struct file *pidfd_file = NULL; + int pidfd; + + if (len > sizeof(pidfd)) + len = sizeof(pidfd); + + spin_lock(&sk->sk_peer_lock); + peer_pid = get_pid(sk->sk_peer_pid); + spin_unlock(&sk->sk_peer_lock); + + if (!peer_pid) + return -ESRCH; + + pidfd = pidfd_prepare(peer_pid, 0, &pidfd_file); + put_pid(peer_pid); + if (pidfd < 0) + return pidfd; + + if (copy_to_sockptr(optval, &pidfd, len) || + copy_to_sockptr(optlen, &len, sizeof(int))) { + put_unused_fd(pidfd); + fput(pidfd_file); + + return -EFAULT; + } + + fd_install(pidfd, pidfd_file); + return 0; + } + case SO_PEERGROUPS: { const struct cred *cred; 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 |