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| author | David Howells <dhowells@redhat.com> | 2017-06-07 18:27:15 +0300 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2017-06-07 19:15:46 +0300 |
| commit | 515559ca21713218595f3a4dad44a4e7eea2fcfb (patch) | |
| tree | 120f6e8449b032b1d29d6ea123460c0fe8b8c82d /Documentation/networking/rxrpc.txt | |
| parent | 216fe8f021e33c36e3b27c49c9f1951f6b037d7f (diff) | |
| download | linux-515559ca21713218595f3a4dad44a4e7eea2fcfb.tar.xz | |
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 'Documentation/networking/rxrpc.txt')
| -rw-r--r-- | Documentation/networking/rxrpc.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/networking/rxrpc.txt b/Documentation/networking/rxrpc.txt index 18078e630a63..bce8e10a2a8e 100644 --- a/Documentation/networking/rxrpc.txt +++ b/Documentation/networking/rxrpc.txt @@ -406,6 +406,10 @@ calls, to invoke certain actions and to report certain conditions. These are: future communication to that server and RXRPC_UPGRADE_SERVICE should no longer be set. +The symbol RXRPC__SUPPORTED is defined as one more than the highest control +message type supported. At run time this can be queried by means of the +RXRPC_SUPPORTED_CMSG socket option (see below). + ============== SOCKET OPTIONS @@ -459,6 +463,11 @@ AF_RXRPC sockets support a few socket options at the SOL_RXRPC level: must point to an array of two unsigned short ints. The first is the service ID to upgrade from and the second the service ID to upgrade to. + (*) RXRPC_SUPPORTED_CMSG + + This is a read-only option that writes an int into the buffer indicating + the highest control message type supported. + ======== SECURITY |