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| author |   santosh.shilimkar@oracle.com <santosh.shilimkar@oracle.com> | 2016-03-01 15:20:43 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-03-02 14:13:17 -0500 |
| commit | 5711f8b353176393ee2ab023808a0a8c4a9d39b5 (patch) | |
| tree | ddbfbdf1709c60bf9d2bc7fb4571eaeaac361770 /net/rds/af_rds.c | |
| parent | RDS: Drop stale iWARP RDMA transport (diff) | |
| download | linux-dev-5711f8b353176393ee2ab023808a0a8c4a9d39b5.tar.xz linux-dev-5711f8b353176393ee2ab023808a0a8c4a9d39b5.zip | |
RDS: Add support for SO_TIMESTAMP for incoming messages
The SO_TIMESTAMP generates time stamp for each incoming RDS messages
User app can enable it by using SO_TIMESTAMP setsocketopt() at
SOL_SOCKET level. CMSG data of cmsg type SO_TIMESTAMP contains the
time stamp in struct timeval format.
Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/af_rds.c')
| -rw-r--r-- | net/rds/af_rds.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c index b5476aebd68d..6beaeb1138f3 100644 --- a/net/rds/af_rds.c +++ b/net/rds/af_rds.c @@ -277,6 +277,27 @@ static int rds_set_transport(struct rds_sock *rs, char __user *optval, return rs->rs_transport ? 0 : -ENOPROTOOPT; } +static int rds_enable_recvtstamp(struct sock *sk, char __user *optval, + int optlen) +{ + int val, valbool; + + if (optlen != sizeof(int)) + return -EFAULT; + + if (get_user(val, (int __user *)optval)) + return -EFAULT; + + valbool = val ? 1 : 0; + + if (valbool) + sock_set_flag(sk, SOCK_RCVTSTAMP); + else + sock_reset_flag(sk, SOCK_RCVTSTAMP); + + return 0; +} + static int rds_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) { @@ -312,6 +333,11 @@ static int rds_setsockopt(struct socket *sock, int level, int optname, ret = rds_set_transport(rs, optval, optlen); release_sock(sock->sk); break; + case SO_TIMESTAMP: + lock_sock(sock->sk); + ret = rds_enable_recvtstamp(sock->sk, optval, optlen); + release_sock(sock->sk); + break; default: ret = -ENOPROTOOPT; } |