From owner-svn-src-stable-10@freebsd.org Tue Jul 21 07:20:03 2015 Return-Path: Delivered-To: svn-src-stable-10@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9B02F9A68A4; Tue, 21 Jul 2015 07:20:03 +0000 (UTC) (envelope-from royger@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 7E4D3185B; Tue, 21 Jul 2015 07:20:03 +0000 (UTC) (envelope-from royger@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.70]) by repo.freebsd.org (8.14.9/8.14.9) with ESMTP id t6L7K3Tq008059; Tue, 21 Jul 2015 07:20:03 GMT (envelope-from royger@FreeBSD.org) Received: (from royger@localhost) by repo.freebsd.org (8.14.9/8.14.9/Submit) id t6L7K3Ol008058; Tue, 21 Jul 2015 07:20:03 GMT (envelope-from royger@FreeBSD.org) Message-Id: <201507210720.t6L7K3Ol008058@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: royger set sender to royger@FreeBSD.org using -f From: Roger Pau Monné Date: Tue, 21 Jul 2015 07:20:03 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r285737 - stable/10/sys/dev/xen/netfront X-SVN-Group: stable-10 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-10@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for only the 10-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Jul 2015 07:20:03 -0000 Author: royger Date: Tue Jul 21 07:20:02 2015 New Revision: 285737 URL: https://svnweb.freebsd.org/changeset/base/285737 Log: MFC: r285089 netfront: preserve configuration across migrations Approved by: re (gjb) Modified: stable/10/sys/dev/xen/netfront/netfront.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/xen/netfront/netfront.c ============================================================================== --- stable/10/sys/dev/xen/netfront/netfront.c Tue Jul 21 06:48:36 2015 (r285736) +++ stable/10/sys/dev/xen/netfront/netfront.c Tue Jul 21 07:20:02 2015 (r285737) @@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include @@ -286,6 +287,8 @@ struct netfront_info { multicall_entry_t rx_mcl[NET_RX_RING_SIZE+1]; mmu_update_t rx_mmu[NET_RX_RING_SIZE]; struct ifmedia sc_media; + + bool xn_resume; }; #define rx_mbufs xn_cdata.xn_rx_chain @@ -501,6 +504,7 @@ netfront_resume(device_t dev) { struct netfront_info *info = device_get_softc(dev); + info->xn_resume = true; netif_disconnect_backend(info); return (0); } @@ -2000,18 +2004,33 @@ xn_query_features(struct netfront_info * static int xn_configure_features(struct netfront_info *np) { - int err; + int err, cap_enabled; err = 0; + + if (np->xn_resume && + ((np->xn_ifp->if_capenable & np->xn_ifp->if_capabilities) + == np->xn_ifp->if_capenable)) { + /* Current options are available, no need to do anything. */ + return (0); + } + + /* Try to preserve as many options as possible. */ + if (np->xn_resume) + cap_enabled = np->xn_ifp->if_capenable; + else + cap_enabled = UINT_MAX; + #if __FreeBSD_version >= 700000 && (defined(INET) || defined(INET6)) - if ((np->xn_ifp->if_capenable & IFCAP_LRO) != 0) + if ((np->xn_ifp->if_capenable & IFCAP_LRO) == (cap_enabled & IFCAP_LRO)) tcp_lro_free(&np->xn_lro); #endif np->xn_ifp->if_capenable = - np->xn_ifp->if_capabilities & ~(IFCAP_LRO|IFCAP_TSO4); + np->xn_ifp->if_capabilities & ~(IFCAP_LRO|IFCAP_TSO4) & cap_enabled; np->xn_ifp->if_hwassist &= ~CSUM_TSO; #if __FreeBSD_version >= 700000 && (defined(INET) || defined(INET6)) - if (xn_enable_lro && (np->xn_ifp->if_capabilities & IFCAP_LRO) != 0) { + if (xn_enable_lro && (np->xn_ifp->if_capabilities & IFCAP_LRO) == + (cap_enabled & IFCAP_LRO)) { err = tcp_lro_init(&np->xn_lro); if (err) { device_printf(np->xbdev, "LRO initialization failed\n"); @@ -2020,7 +2039,8 @@ xn_configure_features(struct netfront_in np->xn_ifp->if_capenable |= IFCAP_LRO; } } - if ((np->xn_ifp->if_capabilities & IFCAP_TSO4) != 0) { + if ((np->xn_ifp->if_capabilities & IFCAP_TSO4) == + (cap_enabled & IFCAP_TSO4)) { np->xn_ifp->if_capenable |= IFCAP_TSO4; np->xn_ifp->if_hwassist |= CSUM_TSO; }