git: a8acc2bf5699 - main - sockets: inherit SO_ACCEPTFILTER from listener to child

The branch main has been updated by glebius:

URL: https://cgit.FreeBSD.org/src/commit/?id=a8acc2bf5699556946dda2a37589d3c3bd9762c6

commit a8acc2bf5699556946dda2a37589d3c3bd9762c6
Author:     Gleb Smirnoff <glebius@FreeBSD.org>
AuthorDate: 2024-04-24 00:17:14 +0000
Commit:     Gleb Smirnoff <glebius@FreeBSD.org>
CommitDate: 2024-04-24 00:17:14 +0000

    sockets: inherit SO_ACCEPTFILTER from listener to child
    
    This is crucial for operation of accept_filter(9).  See added comment.
    
    Fixes:  d29b95ecc0d049406d27a6c11939d40a46658733
---
 sys/kern/uipc_socket.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sys/kern/uipc_socket.c b/sys/kern/uipc_socket.c
index c040bdf4d3eb..f0b36fc5595e 100644
--- a/sys/kern/uipc_socket.c
+++ b/sys/kern/uipc_socket.c
@@ -761,9 +761,13 @@ solisten_clone(struct socket *head)
 	 * including those completely irrelevant to a new born socket.  For
 	 * compatibility with older versions we will inherit a list of
 	 * meaningful options.
+	 * The crucial bit to inherit is SO_ACCEPTFILTER.  We need it present
+	 * in the child socket for soisconnected() promoting socket from the
+	 * incomplete queue to complete.  It will be cleared before the child
+	 * gets available to accept(2).
 	 */
-	so->so_options = head->so_options & (SO_KEEPALIVE | SO_DONTROUTE |
-	    SO_LINGER | SO_OOBINLINE | SO_NOSIGPIPE);
+	so->so_options = head->so_options & (SO_ACCEPTFILTER | SO_KEEPALIVE |
+	    SO_DONTROUTE | SO_LINGER | SO_OOBINLINE | SO_NOSIGPIPE);
 	so->so_linger = head->so_linger;
 	so->so_state = head->so_state;
 	so->so_fibnum = head->so_fibnum;