diff options
| -rw-r--r-- | include/linux/netdevice.h | 9 | ||||
| -rw-r--r-- | net/core/dev.c | 35 | ||||
| -rw-r--r-- | net/core/rtnetlink.c | 4 |
3 files changed, 46 insertions, 2 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 006bb5c0e413..e12f7de6d6ae 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1917,8 +1917,10 @@ enum netdev_ml_priv_type { * @rtnl_link_ops: Rtnl_link_ops * * @gso_max_size: Maximum size of generic segmentation offload + * @tso_max_size: Device (as in HW) limit on the max TSO request size * @gso_max_segs: Maximum number of segments that can be passed to the * NIC for GSO + * @tso_max_segs: Device (as in HW) limit on the max TSO segment count * * @dcbnl_ops: Data Center Bridging netlink ops * @num_tc: Number of traffic classes in the net device @@ -2262,8 +2264,13 @@ struct net_device { /* for setting kernel sock attribute on TCP connection setup */ #define GSO_MAX_SIZE 65536 unsigned int gso_max_size; +#define TSO_LEGACY_MAX_SIZE 65536 +#define TSO_MAX_SIZE UINT_MAX + unsigned int tso_max_size; #define GSO_MAX_SEGS 65535 u16 gso_max_segs; +#define TSO_MAX_SEGS U16_MAX + u16 tso_max_segs; #ifdef CONFIG_DCB const struct dcbnl_rtnl_ops *dcbnl_ops; @@ -4895,6 +4902,8 @@ static inline void netif_set_gro_max_size(struct net_device *dev, WRITE_ONCE(dev->gro_max_size, size); } +void netif_set_tso_max_size(struct net_device *dev, unsigned int size); +void netif_set_tso_max_segs(struct net_device *dev, unsigned int segs); void netif_inherit_tso_max(struct net_device *to, const struct net_device *from); diff --git a/net/core/dev.c b/net/core/dev.c index eef1d19b130f..6ae085b11373 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2993,6 +2993,39 @@ undo_rx: EXPORT_SYMBOL(netif_set_real_num_queues); /** + * netif_set_tso_max_size() - set the max size of TSO frames supported + * @dev: netdev to update + * @size: max skb->len of a TSO frame + * + * Set the limit on the size of TSO super-frames the device can handle. + * Unless explicitly set the stack will assume the value of %GSO_MAX_SIZE. + */ +void netif_set_tso_max_size(struct net_device *dev, unsigned int size) +{ + dev->tso_max_size = size; + if (size < READ_ONCE(dev->gso_max_size)) + netif_set_gso_max_size(dev, size); +} +EXPORT_SYMBOL(netif_set_tso_max_size); + +/** + * netif_set_tso_max_segs() - set the max number of segs supported for TSO + * @dev: netdev to update + * @segs: max number of TCP segments + * + * Set the limit on the number of TCP segments the device can generate from + * a single TSO super-frame. + * Unless explicitly set the stack will assume the value of %GSO_MAX_SEGS. + */ +void netif_set_tso_max_segs(struct net_device *dev, unsigned int segs) +{ + dev->tso_max_segs = segs; + if (segs < READ_ONCE(dev->gso_max_segs)) + netif_set_gso_max_segs(dev, segs); +} +EXPORT_SYMBOL(netif_set_tso_max_segs); + +/** * netif_inherit_tso_max() - copy all TSO limits from a lower device to an upper * @to: netdev to update * @from: netdev from which to copy the limits @@ -10572,6 +10605,8 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, dev->gso_max_size = GSO_MAX_SIZE; dev->gso_max_segs = GSO_MAX_SEGS; dev->gro_max_size = GRO_MAX_SIZE; + dev->tso_max_size = TSO_LEGACY_MAX_SIZE; + dev->tso_max_segs = TSO_MAX_SEGS; dev->upper_level = 1; dev->lower_level = 1; #ifdef CONFIG_LOCKDEP diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index eea5ed09e1bb..e6d4b9272995 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2803,7 +2803,7 @@ static int do_setlink(const struct sk_buff *skb, if (tb[IFLA_GSO_MAX_SIZE]) { u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]); - if (max_size > GSO_MAX_SIZE) { + if (max_size > GSO_MAX_SIZE || max_size > dev->tso_max_size) { err = -EINVAL; goto errout; } @@ -2817,7 +2817,7 @@ static int do_setlink(const struct sk_buff *skb, if (tb[IFLA_GSO_MAX_SEGS]) { u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); - if (max_segs > GSO_MAX_SEGS) { + if (max_segs > GSO_MAX_SEGS || max_segs > dev->tso_max_segs) { err = -EINVAL; goto errout; } |