@@ -394,6 +394,8 @@ struct ethtool_ops {
struct ethtool_coalesce *);
int (*set_per_queue_coalesce)(struct net_device *, u32,
struct ethtool_coalesce *);
+ bool (*virtdev_validate_link_ksettings)(const struct
+ ethtool_link_ksettings *);
int (*get_link_ksettings)(struct net_device *,
struct ethtool_link_ksettings *);
int (*set_link_ksettings)(struct net_device *,
@@ -420,4 +422,9 @@ struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input);
void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *rule);
+bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd);
+int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
+ const struct ethtool_link_ksettings *cmd,
+ u32 *dev_speed, u8 *dev_duplex);
+
#endif /* _LINUX_ETHTOOL_H */
@@ -459,6 +459,25 @@ static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
return 0;
}
+/* Check if the user is trying to change anything besides speed/duplex */
+bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
+{
+ struct ethtool_link_settings base2 = {};
+
+ base2.speed = cmd->base.speed;
+ base2.port = PORT_OTHER;
+ base2.duplex = cmd->base.duplex;
+ base2.cmd = cmd->base.cmd;
+ base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
+
+ return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
+ bitmap_empty(cmd->link_modes.supported,
+ __ETHTOOL_LINK_MODE_MASK_NBITS) &&
+ bitmap_empty(cmd->link_modes.lp_advertising,
+ __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+EXPORT_SYMBOL(ethtool_virtdev_validate_cmd);
+
/* convert a kernel internal ethtool_link_ksettings to
* ethtool_link_usettings in user space. return 0 on success, errno on
* error.
@@ -581,6 +600,27 @@ static int ethtool_set_link_ksettings(struct net_device *dev,
return err;
}
+int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
+ const struct ethtool_link_ksettings *cmd,
+ u32 *dev_speed, u8 *dev_duplex)
+{
+ u32 speed;
+ u8 duplex;
+
+ speed = cmd->base.speed;
+ duplex = cmd->base.duplex;
+ /* don't allow custom speed and duplex */
+ if (!ethtool_validate_speed(speed) ||
+ !ethtool_validate_duplex(duplex) ||
+ !dev->ethtool_ops->virtdev_validate_link_ksettings(cmd))
+ return -EINVAL;
+ *dev_speed = speed;
+ *dev_duplex = duplex;
+
+ return 0;
+}
+EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
+
/* Query device for its ethtool_cmd settings.
*
* Backward compatibility note: for compatibility with legacy ethtool, this is
Three virtual devices (ibmveth, virtio_net, and netvsc) all have similar code to get link settings and validate ethtool command. To eliminate duplication of code, it is factored out into core/ethtool.c. Signed-off-by: Cris Forno <cforno12@linux.vnet.ibm.com> --- include/linux/ethtool.h | 7 +++++++ net/ethtool/ioctl.c | 40 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+)