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Commit 081d094e authored by Ben Hutchings's avatar Ben Hutchings
Browse files

ethtool: Split ethtool_get_eeprom() to allow for additional EEPROM accessors 



We want to support reading module (SFP+, XFP, ...) EEPROMs as well as
NIC EEPROMs.  They will need a different command number and driver
operation, but the structure and arguments will be the same and so we
can share most of the code here.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
parent 64235187

net/core/ethtool.c

+17 −7
Original line number Diff line number Diff line
@@ -751,18 +751,17 @@ static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 
	return 0;

}



static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)

static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,

				  int (*getter)(struct net_device *,

						struct ethtool_eeprom *, u8 *),

				  u32 total_len)

{

	struct ethtool_eeprom eeprom;

	const struct ethtool_ops *ops = dev->ethtool_ops;

	void __user *userbuf = useraddr + sizeof(eeprom);

	u32 bytes_remaining;

	u8 *data;

	int ret = 0;



	if (!ops->get_eeprom || !ops->get_eeprom_len)

		return -EOPNOTSUPP;



	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))

		return -EFAULT;
@@ -771,7 +770,7 @@ static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 
		return -EINVAL;



	/* Check for exceeding total eeprom len */

	if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))

	if (eeprom.offset + eeprom.len > total_len)

		return -EINVAL;



	data = kmalloc(PAGE_SIZE, GFP_USER);
@@ -782,7 +781,7 @@ static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 
	while (bytes_remaining > 0) {

		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);



		ret = ops->get_eeprom(dev, &eeprom, data);

		ret = getter(dev, &eeprom, data);

		if (ret)

			break;

		if (copy_to_user(userbuf, data, eeprom.len)) {
@@ -803,6 +802,17 @@ static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 
	return ret;

}



static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)

{

	const struct ethtool_ops *ops = dev->ethtool_ops;



	if (!ops->get_eeprom || !ops->get_eeprom_len)

		return -EOPNOTSUPP;



	return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,

				      ops->get_eeprom_len(dev));

}



static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)

{

	struct ethtool_eeprom eeprom;