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| author | Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2016-07-14 13:51:04 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-07-15 21:36:58 +0300 |
| commit | d67214a29bc8be3216849215aa4fdca057bd8119 (patch) | |
| tree | 2a02e645b68e47e6a74028b132f3afe7051ed5b5 /Documentation/networking/rds.txt | |
| parent | 5916e2c1554f3e36f770401c989c3c7fadf619ca (diff) | |
| download | linux-d67214a29bc8be3216849215aa4fdca057bd8119.tar.xz | |
Documentation: RDS: updates for SO_RDS_TRANSPORT socket option
Update the documentation to describe the changes added by
commit 8ba38460f363 ("net/rds Add getsockopt support for SO_RDS_TRANSPORT")
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/rds.txt')
| -rw-r--r-- | Documentation/networking/rds.txt | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/Documentation/networking/rds.txt b/Documentation/networking/rds.txt index 9d219d856d46..1366e1114d55 100644 --- a/Documentation/networking/rds.txt +++ b/Documentation/networking/rds.txt @@ -85,7 +85,8 @@ Socket Interface bind(fd, &sockaddr_in, ...) This binds the socket to a local IP address and port, and a - transport. + transport, if one has not already been selected via the + SO_RDS_TRANSPORT socket option sendmsg(fd, ...) Sends a message to the indicated recipient. The kernel will @@ -146,6 +147,20 @@ Socket Interface operation. In this case, it would use RDS_CANCEL_SENT_TO to nuke any pending messages. + setsockopt(fd, SOL_RDS, SO_RDS_TRANSPORT, (int *)&transport ..) + getsockopt(fd, SOL_RDS, SO_RDS_TRANSPORT, (int *)&transport ..) + Set or read an integer defining the underlying + encapsulating transport to be used for RDS packets on the + socket. When setting the option, integer argument may be + one of RDS_TRANS_TCP or RDS_TRANS_IB. When retrieving the + value, RDS_TRANS_NONE will be returned on an unbound socket. + This socket option may only be set exactly once on the socket, + prior to binding it via the bind(2) system call. Attempts to + set SO_RDS_TRANSPORT on a socket for which the transport has + been previously attached explicitly (by SO_RDS_TRANSPORT) or + implicitly (via bind(2)) will return an error of EOPNOTSUPP. + An attempt to set SO_RDS_TRANSPPORT to RDS_TRANS_NONE will + always return EINVAL. RDMA for RDS ============ |