From c8f44affb7244f2ac3e703cab13d55ede27621bb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Tue, 15 Nov 2011 15:29:55 +0000 Subject: net: introduce and use netdev_features_t for device features sets MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit v2: add couple missing conversions in drivers split unexporting netdev_fix_features() implemented %pNF convert sock::sk_route_(no?)caps Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- drivers/net/xen-netfront.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'drivers/net/xen-netfront.c') diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index 226faab23603..a6e379fbf377 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -203,7 +203,7 @@ static void xennet_sysfs_delif(struct net_device *netdev); static int xennet_can_sg(struct net_device *dev) { - return dev->features & NETIF_F_SG; + return !!(dev->features & NETIF_F_SG); } @@ -1190,7 +1190,8 @@ static void xennet_uninit(struct net_device *dev) gnttab_free_grant_references(np->gref_rx_head); } -static u32 xennet_fix_features(struct net_device *dev, u32 features) +static netdev_features_t xennet_fix_features(struct net_device *dev, + netdev_features_t features) { struct netfront_info *np = netdev_priv(dev); int val; @@ -1216,7 +1217,8 @@ static u32 xennet_fix_features(struct net_device *dev, u32 features) return features; } -static int xennet_set_features(struct net_device *dev, u32 features) +static int xennet_set_features(struct net_device *dev, + netdev_features_t features) { if (!(features & NETIF_F_SG) && dev->mtu > ETH_DATA_LEN) { netdev_info(dev, "Reducing MTU because no SG offload"); -- cgit v1.2.3 From 3ad9b358e03fd9dbf6705721490c811b666b0fe2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Wed, 16 Nov 2011 14:05:33 +0000 Subject: net: drivers: use bool type instead of double negation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Save some punctuation by using bool type's property equivalent to doubled negation operator. Reported-by: Ben Hutchings Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- drivers/net/xen-netfront.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/xen-netfront.c') diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index a6e379fbf377..4312db8cdeab 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -201,9 +201,9 @@ static void xennet_sysfs_delif(struct net_device *netdev); #define xennet_sysfs_delif(dev) do { } while (0) #endif -static int xennet_can_sg(struct net_device *dev) +static bool xennet_can_sg(struct net_device *dev) { - return !!(dev->features & NETIF_F_SG); + return dev->features & NETIF_F_SG; } -- cgit v1.2.3 From 08e34eb14fe4cfd934b5c169a7682a969457c4ea Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Sun, 11 Dec 2011 01:48:59 +0000 Subject: xen-netfront: delay gARP until backend switches to Connected After a guest is live migrated, the xen-netfront driver emits a gratuitous ARP message, so that networking hardware on the target host's subnet can take notice, and public routing to the guest is re-established. However, if the packet appears on the backend interface before the backend is added to the target host's bridge, the packet is lost, and the migrated guest's peers become unable to talk to the guest. A sufficient two-parts condition to prevent the above is: (1) ensure that the backend only moves to Connected xenbus state after its hotplug scripts completed, ie. the netback interface got added to the bridge; and (2) ensure the frontend only queues the gARP when it sees the backend move to Connected. These two together provide complete ordering. Sub-condition (1) is already satisfied by commit f942dc2552b8 in Linus' tree, based on commit 6b0b80ca7165 from [1]. In general, the full condition is sufficient, not necessary, because, according to [2], live migration has been working for a long time without satisfying sub-condition (2). However, after 6b0b80ca7165 was backported to the RHEL-5 host to ensure (1), (2) still proved necessary in the RHEL-6 guest. This patch intends to provide (2) for upstream. The Reviewed-by line comes from [3]. [1] git://xenbits.xen.org/people/ianc/linux-2.6.git#upstream/dom0/backend/netback-history [2] http://old-list-archives.xen.org/xen-devel/2011-06/msg01969.html [3] http://old-list-archives.xen.org/xen-devel/2011-07/msg00484.html Signed-off-by: Laszlo Ersek Reviewed-by: Ian Campbell Signed-off-by: David S. Miller --- drivers/net/xen-netfront.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/net/xen-netfront.c') diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index 4312db8cdeab..0a59c57864f5 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1709,7 +1709,6 @@ static void netback_changed(struct xenbus_device *dev, case XenbusStateInitialised: case XenbusStateReconfiguring: case XenbusStateReconfigured: - case XenbusStateConnected: case XenbusStateUnknown: case XenbusStateClosed: break; @@ -1720,6 +1719,9 @@ static void netback_changed(struct xenbus_device *dev, if (xennet_connect(netdev) != 0) break; xenbus_switch_state(dev, XenbusStateConnected); + break; + + case XenbusStateConnected: netif_notify_peers(netdev); break; -- cgit v1.2.3 From 73db144b58a32fc39733db6a7e1fe582072ad26a Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Thu, 22 Dec 2011 09:08:13 +0000 Subject: Xen: consolidate and simplify struct xenbus_driver instantiation The 'name', 'owner', and 'mod_name' members are redundant with the identically named fields in the 'driver' sub-structure. Rather than switching each instance to specify these fields explicitly, introduce a macro to simplify this. Eliminate further redundancy by allowing the drvname argument to DEFINE_XENBUS_DRIVER() to be blank (in which case the first entry from the ID table will be used for .driver.name). Also eliminate the questionable xenbus_register_{back,front}end() wrappers - their sole remaining purpose was the checking of the 'owner' field, proper setting of which shouldn't be an issue anymore when the macro gets used. v2: Restore DRV_NAME for the driver name in xen-pciback. Signed-off-by: Jan Beulich Cc: Jens Axboe Cc: Dmitry Torokhov Cc: Florian Tobias Schandinat Cc: Ian Campbell Cc: David S. Miller Signed-off-by: Konrad Rzeszutek Wilk --- drivers/net/xen-netfront.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'drivers/net/xen-netfront.c') diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index 226faab23603..81ff5a749279 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1910,7 +1910,7 @@ static void xennet_sysfs_delif(struct net_device *netdev) #endif /* CONFIG_SYSFS */ -static struct xenbus_device_id netfront_ids[] = { +static const struct xenbus_device_id netfront_ids[] = { { "vif" }, { "" } }; @@ -1937,15 +1937,12 @@ static int __devexit xennet_remove(struct xenbus_device *dev) return 0; } -static struct xenbus_driver netfront_driver = { - .name = "vif", - .owner = THIS_MODULE, - .ids = netfront_ids, +static DEFINE_XENBUS_DRIVER(netfront, , .probe = netfront_probe, .remove = __devexit_p(xennet_remove), .resume = netfront_resume, .otherend_changed = netback_changed, -}; +); static int __init netif_init(void) { -- cgit v1.2.3 From 40206dd98f066d596d4280558fc5f798165861c7 Mon Sep 17 00:00:00 2001 From: Wei Liu Date: Thu, 26 Jan 2012 07:23:23 +0000 Subject: xen-netfront: correct MAX_TX_TARGET calculation. Signed-off-by: Wei Liu Signed-off-by: David S. Miller --- drivers/net/xen-netfront.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/xen-netfront.c') diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index fa679057630f..698b905058dd 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -68,7 +68,7 @@ struct netfront_cb { #define NET_TX_RING_SIZE __CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE) #define NET_RX_RING_SIZE __CONST_RING_SIZE(xen_netif_rx, PAGE_SIZE) -#define TX_MAX_TARGET min_t(int, NET_RX_RING_SIZE, 256) +#define TX_MAX_TARGET min_t(int, NET_TX_RING_SIZE, 256) struct netfront_stats { u64 rx_packets; -- cgit v1.2.3