diff options
| author | santosh.shilimkar@oracle.com <santosh.shilimkar@oracle.com> | 2016-03-02 00:20:43 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-02 20:13:17 +0100 |
| commit | 5711f8b353176393ee2ab023808a0a8c4a9d39b5 (patch) | |
| tree | ddbfbdf1709c60bf9d2bc7fb4571eaeaac361770 /net/rds/recv.c | |
| parent | RDS: Drop stale iWARP RDMA transport (diff) | |
| download | linux-5711f8b353176393ee2ab023808a0a8c4a9d39b5.tar.xz linux-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/recv.c')
| -rw-r--r-- | net/rds/recv.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/net/rds/recv.c b/net/rds/recv.c index a00462b0d01d..c0be1ecd11c9 100644 --- a/net/rds/recv.c +++ b/net/rds/recv.c @@ -35,6 +35,8 @@ #include <net/sock.h> #include <linux/in.h> #include <linux/export.h> +#include <linux/time.h> +#include <linux/rds.h> #include "rds.h" @@ -46,6 +48,8 @@ void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn, inc->i_conn = conn; inc->i_saddr = saddr; inc->i_rdma_cookie = 0; + inc->i_rx_tstamp.tv_sec = 0; + inc->i_rx_tstamp.tv_usec = 0; } EXPORT_SYMBOL_GPL(rds_inc_init); @@ -228,6 +232,8 @@ void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr, rds_recv_rcvbuf_delta(rs, sk, inc->i_conn->c_lcong, be32_to_cpu(inc->i_hdr.h_len), inc->i_hdr.h_dport); + if (sock_flag(sk, SOCK_RCVTSTAMP)) + do_gettimeofday(&inc->i_rx_tstamp); rds_inc_addref(inc); list_add_tail(&inc->i_item, &rs->rs_recv_queue); __rds_wake_sk_sleep(sk); @@ -381,7 +387,8 @@ static int rds_notify_cong(struct rds_sock *rs, struct msghdr *msghdr) /* * Receive any control messages. */ -static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg) +static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg, + struct rds_sock *rs) { int ret = 0; @@ -392,6 +399,15 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg) return ret; } + if ((inc->i_rx_tstamp.tv_sec != 0) && + sock_flag(rds_rs_to_sk(rs), SOCK_RCVTSTAMP)) { + ret = put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, + sizeof(struct timeval), + &inc->i_rx_tstamp); + if (ret) + return ret; + } + return 0; } @@ -474,7 +490,7 @@ int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, msg->msg_flags |= MSG_TRUNC; } - if (rds_cmsg_recv(inc, msg)) { + if (rds_cmsg_recv(inc, msg, rs)) { ret = -EFAULT; goto out; } |