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| author | Tung Nguyen <tung.q.nguyen@dektech.com.au> | 2019-04-18 16:02:19 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-19 23:59:05 +0200 |
| commit | 42e5425aa0dfd8a6cdd7e177cfd9703df05c7411 (patch) | |
| tree | 39e900102d0b395f3759cb8d252ec84cfc4fb65e | |
| parent | net: dsa: mv88e6xxx: Only reconfigure MAC when something changes (diff) | |
| download | linux-42e5425aa0dfd8a6cdd7e177cfd9703df05c7411.tar.xz linux-42e5425aa0dfd8a6cdd7e177cfd9703df05c7411.zip | |
tipc: introduce new socket option TIPC_SOCK_RECVQ_USED
When using TIPC_SOCK_RECVQ_DEPTH for getsockopt(), it returns the
number of buffers in receive socket buffer which is not so helpful
for user space applications.
This commit introduces the new option TIPC_SOCK_RECVQ_USED which
returns the current allocated bytes of the receive socket buffer.
This helps user space applications dimension its buffer usage to
avoid buffer overload issue.
Signed-off-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/uapi/linux/tipc.h | 1 | ||||
| -rw-r--r-- | net/tipc/socket.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/tipc.h b/include/uapi/linux/tipc.h index 6b2fd4d9655f..7df026ea6aff 100644 --- a/include/uapi/linux/tipc.h +++ b/include/uapi/linux/tipc.h @@ -190,6 +190,7 @@ struct sockaddr_tipc { #define TIPC_MCAST_REPLICAST 134 /* Default: TIPC selects. No arg */ #define TIPC_GROUP_JOIN 135 /* Takes struct tipc_group_req* */ #define TIPC_GROUP_LEAVE 136 /* No argument */ +#define TIPC_SOCK_RECVQ_USED 137 /* Default: none (read only) */ /* * Flag values diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 8ac8ddf1e324..1385207a301f 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -3070,6 +3070,9 @@ static int tipc_getsockopt(struct socket *sock, int lvl, int opt, case TIPC_SOCK_RECVQ_DEPTH: value = skb_queue_len(&sk->sk_receive_queue); break; + case TIPC_SOCK_RECVQ_USED: + value = sk_rmem_alloc_get(sk); + break; case TIPC_GROUP_JOIN: seq.type = 0; if (tsk->group) |