smb: client: default to nonativesocket under POSIX mounts

JIRA: https://issues.redhat.com/browse/RHEL-109507

commit 6b44530
Author: Paulo Alcantara <pc@manguebit.org>
Date:   Thu Jul 31 20:46:42 2025 -0300

    smb: client: default to nonativesocket under POSIX mounts

    SMB3.1.1 POSIX mounts require sockets to be created with NFS reparse
    points.

    Cc: linux-cifs@vger.kernel.org
    Cc: Ralph Boehme <slow@samba.org>
    Cc: David Howells <dhowells@redhat.com>
    Cc: <stable@vger.kernel.org>
    Reported-by: Matthew Richardson <m.richardson@ed.ac.uk>
    Closes: https://marc.info/?i=1124e7cd-6a46-40a6-9f44-b7664a66654b@ed.ac.uk
    Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
    Signed-off-by: Steve French <stfrench@microsoft.com>

Signed-off-by: Paulo Alcantara <paalcant@redhat.com>

Author: pcacjr

fs/smb/client/fs_context.c

@@ -1667,6 +1667,7 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
 				pr_warn_once("conflicting posix mount options specified\n");
 			ctx->linux_ext = 1;
 			ctx->no_linux_ext = 0;
+			ctx->nonativesocket = 1; /* POSIX mounts use NFS style reparse points */
 		}
 		break;
 	case Opt_nocase: