From: Xin Xiaohui <[email protected]> Currently, it can get external buffers from mp device.
Signed-off-by: Xin Xiaohui <[email protected]> Signed-off-by: Zhao Yu <[email protected]> Reviewed-by: Jeff Dike <[email protected]> --- include/linux/skbuff.h | 12 ++++++++++++ net/core/skbuff.c | 16 ++++++++++++++++ 2 files changed, 28 insertions(+), 0 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index cf309c9..281a1c0 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1519,6 +1519,18 @@ static inline void netdev_free_page(struct net_device *dev, struct page *page) __free_page(page); } +extern struct skb_external_page *netdev_alloc_external_pages( + struct net_device *dev, + struct sk_buff *skb, int npages); + +static inline struct skb_external_page *netdev_alloc_external_page( + struct net_device *dev, + struct sk_buff *skb, unsigned int size) +{ + return netdev_alloc_external_pages(dev, skb, + DIV_ROUND_UP(size, PAGE_SIZE)); +} + /** * skb_clone_writable - is the header of a clone writable * @skb: buffer to check diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 93c4e06..fbdb1f1 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -278,6 +278,22 @@ struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask) } EXPORT_SYMBOL(__netdev_alloc_page); +struct skb_external_page *netdev_alloc_external_pages(struct net_device *dev, + struct sk_buff *skb, int npages) +{ + struct mpassthru_port *port; + struct skb_external_page *ext_page = NULL; + + port = rcu_dereference(dev->mp_port); + if (!port) + goto out; + WARN_ON(npages > port->npages); + ext_page = port->ctor(port, skb, npages); +out: + return ext_page; +} +EXPORT_SYMBOL(netdev_alloc_external_pages); + void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off, int size) { -- 1.5.4.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
