skbuff: Move definition of NETDEV_FRAG_PAGE_MAX_SIZE (e5e67305) · Commits · 戴 / test

In order to address the fact that some devices cannot support the full 32K frag size we need to have the value accessible somewhere so that we can use it to do comparisons against what the device can support. As such I am moving the values out of skbuff.c and into skbuff.h. Signed-off-by:

Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/linux/skbuff.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -1832,6 +1832,10 @@ static inline void __skb_queue_purge(struct sk_buff_head *list)
		kfree_skb(skb);
		}

		#define NETDEV_FRAG_PAGE_MAX_ORDER get_order(32768)
		#define NETDEV_FRAG_PAGE_MAX_SIZE (PAGE_SIZE << NETDEV_FRAG_PAGE_MAX_ORDER)
		#define NETDEV_PAGECNT_MAX_BIAS NETDEV_FRAG_PAGE_MAX_SIZE

		extern void *netdev_alloc_frag(unsigned int fragsz);

		extern struct sk_buff __netdev_alloc_skb(struct net_device dev,

net/core/skbuff.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -351,10 +351,6 @@ struct netdev_alloc_cache {
		};
		static DEFINE_PER_CPU(struct netdev_alloc_cache, netdev_alloc_cache);

		#define NETDEV_FRAG_PAGE_MAX_ORDER get_order(32768)
		#define NETDEV_FRAG_PAGE_MAX_SIZE (PAGE_SIZE << NETDEV_FRAG_PAGE_MAX_ORDER)
		#define NETDEV_PAGECNT_MAX_BIAS NETDEV_FRAG_PAGE_MAX_SIZE

		static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask)
		{
		struct netdev_alloc_cache *nc;

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