[RFC 2.6.10 12/22] ethtool: Add support for crypto offload

David Dillow
2004-12-30T08:59:55Z

# 2004/12/30 00:51:19-05:00 dave@thedillows.org
# Add support for querying and changing the status of the
# IPSEC crypto offload feature of a NIC.
#
# Signed-off-by: David Dillow <dave@thedillows.org>
#
# net/core/ethtool.c
# 2004/12/30 00:51:00-05:00 dave@thedillows.org +54 -0
# Add support for querying and changing the status of the IPSEC
# crypto offload feature of a NIC.
#
# Turn on/off the feature flag before informing the xfrm engine
# of the change so that existing xfrms get the new settings.
#
# Signed-off-by: David Dillow <dave@thedillows.org>
#
# include/linux/ethtool.h
# 2004/12/30 00:51:00-05:00 dave@thedillows.org +8 -0
# Add support for querying and changing the status of the
# IPSEC crypto offload feature of a NIC.
#
# Signed-off-by: David Dillow <dave@thedillows.org>
#
diff -Nru a/include/linux/ethtool.h b/include/linux/ethtool.h
--- a/include/linux/ethtool.h 2004-12-30 01:09:49 -05:00
+++ b/include/linux/ethtool.h 2004-12-30 01:09:49 -05:00
@@ -260,6 +260,8 @@
int ethtool_op_set_sg(struct net_device *dev, u32 data);
u32 ethtool_op_get_tso(struct net_device *dev);
int ethtool_op_set_tso(struct net_device *dev, u32 data);
+u32 ethtool_op_get_ipsec(struct net_device *dev);
+int ethtool_op_set_ipsec(struct net_device *dev, u32 data);

/**
* &ethtool_ops - Alter and report network device settings
@@ -293,6 +295,8 @@
* get_strings: Return a set of strings that describe the requested objects
* phys_id: Identify the device
* get_stats: Return statistics about the device
+ * get_ipsec: Report whether IPSEC crypto offload is enabled
+ * set_ipsec: Turn IPSEC crypto offload on or off
*
* Description:
*
@@ -345,6 +349,8 @@
int (*set_sg)(struct net_device *, u32);
u32 (*get_tso)(struct net_device *);
int (*set_tso)(struct net_device *, u32);
+ u32 (*get_ipsec)(struct net_device *);
+ int (*set_ipsec)(struct net_device *, u32);
int (*self_test_count)(struct net_device *);
void (*self_test)(struct net_device *, struct ethtool_test *, u64 *);
void (*get_strings)(struct net_device *, u32 stringset, u8 *);
@@ -388,6 +394,8 @@
#define ETHTOOL_GSTATS 0x0000001d /* get NIC-specific statistics */
#define ETHTOOL_GTSO 0x0000001e /* Get TSO enable (ethtool_value) */
#define ETHTOOL_STSO 0x0000001f /* Set TSO enable (ethtool_value) */
+#define ETHTOOL_GIPSEC 0x00000020 /* Get IPSEC enable (ethtool_value) */
+#define ETHTOOL_SIPSEC 0x00000021 /* Set IPSEC enable (ethtool_value) */

/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
diff -Nru a/net/core/ethtool.c b/net/core/ethtool.c
--- a/net/core/ethtool.c 2004-12-30 01:09:49 -05:00
+++ b/net/core/ethtool.c 2004-12-30 01:09:49 -05:00
@@ -14,6 +14,7 @@
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
+#include <net/xfrm.h>
#include <asm/uaccess.h>

/*
@@ -72,6 +73,24 @@
return 0;
}

+u32 ethtool_op_get_ipsec(struct net_device *dev)
+{
+ return (dev->features & NETIF_F_IPSEC) != 0;
+}
+
+int ethtool_op_set_ipsec(struct net_device *dev, u32 data)
+{
+ if (data) {
+ dev->features |= NETIF_F_IPSEC;
+ xfrm_accel_add(dev);
+ } else {
+ dev->features &= ~NETIF_F_IPSEC;
+ xfrm_accel_flush(dev);
+ }
+
+ return 0;
+}
+
/* Handlers for each ethtool command */

static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
@@ -548,6 +567,33 @@
return dev->ethtool_ops->set_tso(dev, edata.data);
}

+static int ethtool_get_ipsec(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata = { ETHTOOL_GIPSEC };
+
+ if (!dev->ethtool_ops->get_ipsec)
+ return -EOPNOTSUPP;
+
+ edata.data = dev->ethtool_ops->get_ipsec(dev);
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_ipsec(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata;
+
+ if (!dev->ethtool_ops->set_ipsec)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&edata, useraddr, sizeof(edata)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_ipsec(dev, edata.data);
+}
+
static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
{
struct ethtool_test test;
@@ -783,6 +829,12 @@
case ETHTOOL_STSO:
rc = ethtool_set_tso(dev, useraddr);
break;
+ case ETHTOOL_GIPSEC:
+ rc = ethtool_get_ipsec(dev, useraddr);
+ break;
+ case ETHTOOL_SIPSEC:
+ rc = ethtool_set_ipsec(dev, useraddr);
+ break;
case ETHTOOL_TEST:
rc = ethtool_self_test(dev, useraddr);
break;
@@ -813,7 +865,9 @@
EXPORT_SYMBOL(ethtool_op_get_link);
EXPORT_SYMBOL(ethtool_op_get_sg);
EXPORT_SYMBOL(ethtool_op_get_tso);
+EXPORT_SYMBOL(ethtool_op_get_ipsec);
EXPORT_SYMBOL(ethtool_op_get_tx_csum);
EXPORT_SYMBOL(ethtool_op_set_sg);
EXPORT_SYMBOL(ethtool_op_set_tso);
+EXPORT_SYMBOL(ethtool_op_set_ipsec);
EXPORT_SYMBOL(ethtool_op_set_tx_csum);