Re: [MPTCP] [PATCH 24/24] net: pass a sockptr_t into ->setsockopt

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Hi Christoph,

On 20/07/2020 14:47, Christoph Hellwig wrote:
Rework the remaining setsockopt code to pass a sockptr_t instead of a
plain user pointer.  This removes the last remaining set_fs(KERNEL_DS)
outside of architecture specific code.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---

...
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 27b6f250b87dfd..30a8e697b9db9c 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1627,7 +1627,7 @@ static void mptcp_destroy(struct sock *sk)
  }
static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname,
-				       char __user *optval, unsigned int optlen)
+				       sockptr_t optval, unsigned int optlen)
  {
  	struct sock *sk = (struct sock *)msk;
  	struct socket *ssock;
@@ -1643,8 +1643,8 @@ static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname,
  			return -EINVAL;
  		}
- ret = sock_setsockopt(ssock, SOL_SOCKET, optname,
-				      USER_SOCKPTR(optval), optlen);
+		ret = sock_setsockopt(ssock, SOL_SOCKET, optname, optval,
+				      optlen);

A very small detail related to the modifications in MPTCP code, only if you have to send a v2 and if you don't mind: may you move "optlen" to the previous line like it was before your patch 7/24. Same below at the end of the function.

That would reduce the global diff in MPTCP files to function signatures only.

Cheers,
Matt
--
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net



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