[PATCH V2] net/rds: correct socket tunable error in rds_tcp_tune()

Correct an error where setting /proc/sys/net/rds/tcp/rds_tcp_rcvbuf would
instead modify the socket's sk_sndbuf and would leave sk_rcvbuf untouched.

Fixes: c6a58ffed536 ("RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket")
Signed-off-by: William Kucharski <redacted>
---
V2: Add Fixes tag to refer to original commit that introduced the issue

 net/rds/tcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/rds/tcp.c b/net/rds/tcp.c
index abf19c0e3ba0..5327d130c4b5 100644
--- a/net/rds/tcp.c
+++ b/net/rds/tcp.c

@@ -500,7 +500,7 @@ void rds_tcp_tune(struct socket *sock)
 		sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
 	}
 	if (rtn->rcvbuf_size > 0) {
-		sk->sk_sndbuf = rtn->rcvbuf_size;
+		sk->sk_rcvbuf = rtn->rcvbuf_size;
 		sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
 	}
 	release_sock(sk);

-- 
2.33.1

On Dec 1, 2021, at 6:45 AM, William Kucharski [off-list ref] wrote:

Correct an error where setting /proc/sys/net/rds/tcp/rds_tcp_rcvbuf would
instead modify the socket's sk_sndbuf and would leave sk_rcvbuf untouched.

Fixes: c6a58ffed536 ("RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket")
Signed-off-by: William Kucharski <redacted>
---
V2: Add Fixes tag to refer to original commit that introduced the issue

Good catch.

Acked-by: Santosh Shilimkar <redacted>

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller [off-list ref]:

On Wed,  1 Dec 2021 07:45:22 -0700 you wrote:

Correct an error where setting /proc/sys/net/rds/tcp/rds_tcp_rcvbuf would
instead modify the socket's sk_sndbuf and would leave sk_rcvbuf untouched.

Fixes: c6a58ffed536 ("RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket")
Signed-off-by: William Kucharski <redacted>
---
V2: Add Fixes tag to refer to original commit that introduced the issue

[...]

Here is the summary with links:
  - [V2] net/rds: correct socket tunable error in rds_tcp_tune()
    https://git.kernel.org/netdev/net/c/19f36edf14bc

You are awesome, thank you!
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