diff options
| author | David Howells <dhowells@redhat.com> | 2017-06-07 16:27:15 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2017-06-07 17:15:46 +0100 |
| commit | 515559ca21713218595f3a4dad44a4e7eea2fcfb (patch) | |
| tree | 120f6e8449b032b1d29d6ea123460c0fe8b8c82d /net/rxrpc | |
| parent | 216fe8f021e33c36e3b27c49c9f1951f6b037d7f (diff) | |
rxrpc: Provide a getsockopt call to query what cmsgs types are supported
Provide a getsockopt() call that can query what cmsg types are supported by
AF_RXRPC.
Diffstat (limited to 'net/rxrpc')
| -rw-r--r-- | net/rxrpc/af_rxrpc.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c index 0c4dc4a7832c..44a52b82bb5d 100644 --- a/net/rxrpc/af_rxrpc.c +++ b/net/rxrpc/af_rxrpc.c @@ -582,6 +582,34 @@ error: } /* + * Get socket options. + */ +static int rxrpc_getsockopt(struct socket *sock, int level, int optname, + char __user *optval, int __user *_optlen) +{ + int optlen; + + if (level != SOL_RXRPC) + return -EOPNOTSUPP; + + if (get_user(optlen, _optlen)) + return -EFAULT; + + switch (optname) { + case RXRPC_SUPPORTED_CMSG: + if (optlen < sizeof(int)) + return -ETOOSMALL; + if (put_user(RXRPC__SUPPORTED - 1, (int __user *)optval) || + put_user(sizeof(int), _optlen)) + return -EFAULT; + return 0; + + default: + return -EOPNOTSUPP; + } +} + +/* * permit an RxRPC socket to be polled */ static unsigned int rxrpc_poll(struct file *file, struct socket *sock, @@ -784,7 +812,7 @@ static const struct proto_ops rxrpc_rpc_ops = { .listen = rxrpc_listen, .shutdown = rxrpc_shutdown, .setsockopt = rxrpc_setsockopt, - .getsockopt = sock_no_getsockopt, + .getsockopt = rxrpc_getsockopt, .sendmsg = rxrpc_sendmsg, .recvmsg = rxrpc_recvmsg, .mmap = sock_no_mmap, |