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-rw-r--r--drivers/net/bonding/bond_main.c16
-rw-r--r--include/linux/netdevice.h12
-rw-r--r--net/bridge/br_device.c2
-rw-r--r--net/bridge/br_if.c14
-rw-r--r--net/core/dev.c135
5 files changed, 104 insertions, 75 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 8e2be24f3fe4..832739f38db4 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1341,18 +1341,24 @@ static int bond_compute_features(struct bonding *bond)
int i;
features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
- features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
- NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
+ features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
+
+ if (!bond->first_slave)
+ goto done;
+
+ features &= ~NETIF_F_ONE_FOR_ALL;
bond_for_each_slave(bond, slave, i) {
- features = netdev_compute_features(features,
- slave->dev->features);
+ features = netdev_increment_features(features,
+ slave->dev->features,
+ NETIF_F_ONE_FOR_ALL);
if (slave->dev->hard_header_len > max_hard_header_len)
max_hard_header_len = slave->dev->hard_header_len;
}
+done:
features |= (bond_dev->features & BOND_VLAN_FEATURES);
- bond_dev->features = features;
+ bond_dev->features = netdev_fix_features(features, NULL);
bond_dev->hard_header_len = max_hard_header_len;
return 0;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 64875859d654..c8bcb59adfdf 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -541,6 +541,14 @@ struct net_device
#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
+ /*
+ * If one device supports one of these features, then enable them
+ * for all in netdev_increment_features.
+ */
+#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
+ NETIF_F_SG | NETIF_F_HIGHDMA | \
+ NETIF_F_FRAGLIST)
+
/* Interface index. Unique device identifier */
int ifindex;
int iflink;
@@ -1698,7 +1706,9 @@ extern char *netdev_drivername(const struct net_device *dev, char *buffer, int l
extern void linkwatch_run_queue(void);
-extern int netdev_compute_features(unsigned long all, unsigned long one);
+unsigned long netdev_increment_features(unsigned long all, unsigned long one,
+ unsigned long mask);
+unsigned long netdev_fix_features(unsigned long features, const char *name);
static inline int net_gso_ok(int features, int gso_type)
{
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 22ba8632196f..6c023f0f8252 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -179,5 +179,5 @@ void br_dev_setup(struct net_device *dev)
dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX |
- NETIF_F_NETNS_LOCAL;
+ NETIF_F_NETNS_LOCAL | NETIF_F_GSO;
}
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 573e20f7dba4..0a09ccf68c1c 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -347,15 +347,21 @@ int br_min_mtu(const struct net_bridge *br)
void br_features_recompute(struct net_bridge *br)
{
struct net_bridge_port *p;
- unsigned long features;
+ unsigned long features, mask;
- features = br->feature_mask;
+ features = mask = br->feature_mask;
+ if (list_empty(&br->port_list))
+ goto done;
+
+ features &= ~NETIF_F_ONE_FOR_ALL;
list_for_each_entry(p, &br->port_list, list) {
- features = netdev_compute_features(features, p->dev->features);
+ features = netdev_increment_features(features,
+ p->dev->features, mask);
}
- br->dev->features = features;
+done:
+ br->dev->features = netdev_fix_features(features, NULL);
}
/* called with RTNL */
diff --git a/net/core/dev.c b/net/core/dev.c
index b8a4fd0806af..d9038e328cc1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3947,6 +3947,46 @@ static void netdev_init_queue_locks(struct net_device *dev)
__netdev_init_queue_locks_one(dev, &dev->rx_queue, NULL);
}
+unsigned long netdev_fix_features(unsigned long features, const char *name)
+{
+ /* Fix illegal SG+CSUM combinations. */
+ if ((features & NETIF_F_SG) &&
+ !(features & NETIF_F_ALL_CSUM)) {
+ if (name)
+ printk(KERN_NOTICE "%s: Dropping NETIF_F_SG since no "
+ "checksum feature.\n", name);
+ features &= ~NETIF_F_SG;
+ }
+
+ /* TSO requires that SG is present as well. */
+ if ((features & NETIF_F_TSO) && !(features & NETIF_F_SG)) {
+ if (name)
+ printk(KERN_NOTICE "%s: Dropping NETIF_F_TSO since no "
+ "SG feature.\n", name);
+ features &= ~NETIF_F_TSO;
+ }
+
+ if (features & NETIF_F_UFO) {
+ if (!(features & NETIF_F_GEN_CSUM)) {
+ if (name)
+ printk(KERN_ERR "%s: Dropping NETIF_F_UFO "
+ "since no NETIF_F_HW_CSUM feature.\n",
+ name);
+ features &= ~NETIF_F_UFO;
+ }
+
+ if (!(features & NETIF_F_SG)) {
+ if (name)
+ printk(KERN_ERR "%s: Dropping NETIF_F_UFO "
+ "since no NETIF_F_SG feature.\n", name);
+ features &= ~NETIF_F_UFO;
+ }
+ }
+
+ return features;
+}
+EXPORT_SYMBOL(netdev_fix_features);
+
/**
* register_netdevice - register a network device
* @dev: device to register
@@ -4032,36 +4072,7 @@ int register_netdevice(struct net_device *dev)
dev->features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM|NETIF_F_HW_CSUM);
}
-
- /* Fix illegal SG+CSUM combinations. */
- if ((dev->features & NETIF_F_SG) &&
- !(dev->features & NETIF_F_ALL_CSUM)) {
- printk(KERN_NOTICE "%s: Dropping NETIF_F_SG since no checksum feature.\n",
- dev->name);
- dev->features &= ~NETIF_F_SG;
- }
-
- /* TSO requires that SG is present as well. */
- if ((dev->features & NETIF_F_TSO) &&
- !(dev->features & NETIF_F_SG)) {
- printk(KERN_NOTICE "%s: Dropping NETIF_F_TSO since no SG feature.\n",
- dev->name);
- dev->features &= ~NETIF_F_TSO;
- }
- if (dev->features & NETIF_F_UFO) {
- if (!(dev->features & NETIF_F_HW_CSUM)) {
- printk(KERN_ERR "%s: Dropping NETIF_F_UFO since no "
- "NETIF_F_HW_CSUM feature.\n",
- dev->name);
- dev->features &= ~NETIF_F_UFO;
- }
- if (!(dev->features & NETIF_F_SG)) {
- printk(KERN_ERR "%s: Dropping NETIF_F_UFO since no "
- "NETIF_F_SG feature.\n",
- dev->name);
- dev->features &= ~NETIF_F_UFO;
- }
- }
+ dev->features = netdev_fix_features(dev->features, dev->name);
/* Enable software GSO if SG is supported. */
if (dev->features & NETIF_F_SG)
@@ -4700,49 +4711,45 @@ static int __init netdev_dma_register(void) { return -ENODEV; }
#endif /* CONFIG_NET_DMA */
/**
- * netdev_compute_feature - compute conjunction of two feature sets
- * @all: first feature set
- * @one: second feature set
+ * netdev_increment_features - increment feature set by one
+ * @all: current feature set
+ * @one: new feature set
+ * @mask: mask feature set
*
* Computes a new feature set after adding a device with feature set
- * @one to the master device with current feature set @all. Returns
- * the new feature set.
+ * @one to the master device with current feature set @all. Will not
+ * enable anything that is off in @mask. Returns the new feature set.
*/
-int netdev_compute_features(unsigned long all, unsigned long one)
-{
- /* if device needs checksumming, downgrade to hw checksumming */
- if (all & NETIF_F_NO_CSUM && !(one & NETIF_F_NO_CSUM))
- all ^= NETIF_F_NO_CSUM | NETIF_F_HW_CSUM;
-
- /* if device can't do all checksum, downgrade to ipv4/ipv6 */
- if (all & NETIF_F_HW_CSUM && !(one & NETIF_F_HW_CSUM))
- all ^= NETIF_F_HW_CSUM
- | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
-
- if (one & NETIF_F_GSO)
- one |= NETIF_F_GSO_SOFTWARE;
- one |= NETIF_F_GSO;
-
- /*
- * If even one device supports a GSO protocol with software fallback,
- * enable it for all.
- */
- all |= one & NETIF_F_GSO_SOFTWARE;
+unsigned long netdev_increment_features(unsigned long all, unsigned long one,
+ unsigned long mask)
+{
+ /* If device needs checksumming, downgrade to it. */
+ if (all & NETIF_F_NO_CSUM && !(one & NETIF_F_NO_CSUM))
+ all ^= NETIF_F_NO_CSUM | (one & NETIF_F_ALL_CSUM);
+ else if (mask & NETIF_F_ALL_CSUM) {
+ /* If one device supports v4/v6 checksumming, set for all. */
+ if (one & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM) &&
+ !(all & NETIF_F_GEN_CSUM)) {
+ all &= ~NETIF_F_ALL_CSUM;
+ all |= one & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
+ }
- /* If even one device supports robust GSO, enable it for all. */
- if (one & NETIF_F_GSO_ROBUST)
- all |= NETIF_F_GSO_ROBUST;
+ /* If one device supports hw checksumming, set for all. */
+ if (one & NETIF_F_GEN_CSUM && !(all & NETIF_F_GEN_CSUM)) {
+ all &= ~NETIF_F_ALL_CSUM;
+ all |= NETIF_F_HW_CSUM;
+ }
+ }
- all &= one | NETIF_F_LLTX;
+ one |= NETIF_F_ALL_CSUM;
- if (!(all & NETIF_F_ALL_CSUM))
- all &= ~NETIF_F_SG;
- if (!(all & NETIF_F_SG))
- all &= ~NETIF_F_GSO_MASK;
+ one |= all & NETIF_F_ONE_FOR_ALL;
+ all &= one | NETIF_F_LLTX | NETIF_F_GSO;
+ all |= one & mask & NETIF_F_ONE_FOR_ALL;
return all;
}
-EXPORT_SYMBOL(netdev_compute_features);
+EXPORT_SYMBOL(netdev_increment_features);
static struct hlist_head *netdev_create_hash(void)
{
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.