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FAILED: patch "[PATCH] selftests: mptcp: make sendfile selftest work" failed to apply to 5.15-stable tree

PATCH [email protected] 1 participant 1 message Aug 22, 2022

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Networking Stable branch Kselftest Networking MPTCP
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The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From df9e03aec3b14970df05b72d54f8ac9da3ab29e1 Mon Sep 17 00:00:00 2001
From: Florian Westphal <[email protected]>
Date: Thu, 4 Aug 2022 17:21:27 -0700
Subject: [PATCH] selftests: mptcp: make sendfile selftest work

When the selftest got added, sendfile() on mptcp sockets returned -EOPNOTSUPP, so running 'mptcp_connect.sh -m sendfile' failed immediately.

This is no longer the case, but the script fails anyway due to timeout. Let the receiver know once the sender has sent all data, just like with '-m mmap' mode.

v2: need to respect cfg_wait too, as pm_userspace.sh relied on -m sendfile to keep the connection open (Mat Martineau)

Fixes 048d19d444be ("mptcp: add basic kselftest for mptcp")
Reported-by Xiumei Mu <[email protected]>
Reviewed-by Mat Martineau <[email protected]>
Signed-off-by Florian Westphal <[email protected]>
Signed-off-by Mat Martineau <[email protected]>
Signed-off-by David S. Miller <[email protected]>
tools/testing/selftests/net/mptcp/mptcp_connect.c +17 -9
index e2ea6c126c99..24d4e9cb617e 100644
@@ -553,6 +553,18 @@ static void set_nonblock(int fd, bool nonblock)
 		fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
 }
 
+static void shut_wr(int fd)
+{
+	/* Close our write side, ev. give some time
+	 * for address notification and/or checking
+	 * the current status
+	 */
+	if (cfg_wait)
+		usleep(cfg_wait);
+
+	shutdown(fd, SHUT_WR);
+}
+
 static int copyfd_io_poll(int infd, int peerfd, int outfd, bool *in_closed_after_out)
 {
 	struct pollfd fds = {

@@ -630,14 +642,7 @@ static int copyfd_io_poll(int infd, int peerfd, int outfd, bool *in_closed_after
 					/* ... and peer also closed already */
 					break;
 
-				/* ... but we still receive.
-				 * Close our write side, ev. give some time
-				 * for address notification and/or checking
-				 * the current status
-				 */
-				if (cfg_wait)
-					usleep(cfg_wait);
-				shutdown(peerfd, SHUT_WR);
+				shut_wr(peerfd);
 			} else {
 				if (errno == EINTR)
 					continue;

@@ -767,7 +772,7 @@ static int copyfd_io_mmap(int infd, int peerfd, int outfd,
 		if (err)
 			return err;
 
-		shutdown(peerfd, SHUT_WR);
+		shut_wr(peerfd);
 
 		err = do_recvfile(peerfd, outfd);
 		*in_closed_after_out = true;

@@ -791,6 +796,9 @@ static int copyfd_io_sendfile(int infd, int peerfd, int outfd,
 		err = do_sendfile(infd, peerfd, size);
 		if (err)
 			return err;
+
+		shut_wr(peerfd);
+
 		err = do_recvfile(peerfd, outfd);
 		*in_closed_after_out = true;
 	}