From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57954) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aldtw-00062j-Sr for qemu-devel@nongnu.org; Thu, 31 Mar 2016 10:48:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aldts-0003XU-Sv for qemu-devel@nongnu.org; Thu, 31 Mar 2016 10:48:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40465) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aldts-0003XG-LC for qemu-devel@nongnu.org; Thu, 31 Mar 2016 10:48:44 -0400 From: Thomas Huth Date: Thu, 31 Mar 2016 16:48:41 +0200 Message-Id: <1459435721-21351-1-git-send-email-thuth@redhat.com> Subject: [Qemu-devel] [PATCH] slirp: Fix migration from older versions of QEMU to the current one List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Samuel Thibault , qemu-devel@nongnu.org Cc: Jan Kiszka While adding the IPv6 support, the commit eae303ff23f51259eddc8856c71453d8 ("slirp: Make Socket structure IPv6 compatible") changed the format of the migration stream, without taking into account that we might still receive an old migration stream layout when upgrading from QEMU version 2.5 (or older) to QEMU 2.6. Currently, QEMU bails out when doing a migration from QEMU 2.5 to the recent master version when it has been started with a "-net user,guestfwd=..." network. So let's fix this by checking the version ID of the migration stream and by using the old behavior if we've detected version 3 or less. Signed-off-by: Thomas Huth --- slirp/slirp.c | 44 ++++++++++++++++++++++++++------------------ 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/slirp/slirp.c b/slirp/slirp.c index 3481fcc..998f278 100644 --- a/slirp/slirp.c +++ b/slirp/slirp.c @@ -1233,31 +1233,39 @@ static int slirp_sbuf_load(QEMUFile *f, struct sbuf *sbuf) return 0; } -static int slirp_socket_load(QEMUFile *f, struct socket *so) +static int slirp_socket_load(QEMUFile *f, struct socket *so, int version_id) { if (tcp_attach(so) < 0) return -ENOMEM; so->so_urgc = qemu_get_be32(f); - so->so_ffamily = qemu_get_be16(f); - switch (so->so_ffamily) { - case AF_INET: + if (version_id <= 3) { + so->so_ffamily = AF_INET; so->so_faddr.s_addr = qemu_get_be32(f); - so->so_fport = qemu_get_be16(f); - break; - default: - error_report( - "so_ffamily unknown, unable to restore so_faddr and so_lport\n"); - } - so->so_lfamily = qemu_get_be16(f); - switch (so->so_lfamily) { - case AF_INET: so->so_laddr.s_addr = qemu_get_be32(f); + so->so_fport = qemu_get_be16(f); so->so_lport = qemu_get_be16(f); - break; - default: - error_report( - "so_ffamily unknown, unable to restore so_laddr and so_lport\n"); + } else { + so->so_ffamily = qemu_get_be16(f); + switch (so->so_ffamily) { + case AF_INET: + so->so_faddr.s_addr = qemu_get_be32(f); + so->so_fport = qemu_get_be16(f); + break; + default: + error_report( + "so_ffamily unknown, unable to restore so_faddr and so_lport"); + } + so->so_lfamily = qemu_get_be16(f); + switch (so->so_lfamily) { + case AF_INET: + so->so_laddr.s_addr = qemu_get_be32(f); + so->so_lport = qemu_get_be16(f); + break; + default: + error_report( + "so_ffamily unknown, unable to restore so_laddr and so_lport"); + } } so->so_iptos = qemu_get_byte(f); so->so_emu = qemu_get_byte(f); @@ -1294,7 +1302,7 @@ static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) if (!so) return -ENOMEM; - ret = slirp_socket_load(f, so); + ret = slirp_socket_load(f, so, version_id); if (ret < 0) return ret; -- 1.8.3.1