[PATCH net-next 2/3] net: dev: move inline skb_needs_linearize helper to header
From: Daniel Borkmann <hidden>
Date: 2013-12-06 10:36:23
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
As we need it elsewhere, move the inline helper function of skb_needs_linearize() over to skbuff.h include file. While at it, also convert the return to 'bool' instead of 'int' and add a proper kernel doc. Signed-off-by: Daniel Borkmann <redacted> Signed-off-by: Jesper Dangaard Brouer <redacted> --- include/linux/skbuff.h | 18 ++++++++++++++++++ net/core/dev.c | 15 --------------- 2 files changed, 18 insertions(+), 15 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index bec1cc7..7100531 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h@@ -2395,6 +2395,24 @@ static inline void *skb_header_pointer(const struct sk_buff *skb, int offset, return buffer; } +/** + * skb_needs_linearize - check if we need to linearize a given skb + * depending on the given device features. + * @skb: socket buffer to check + * @features: net device features + * + * Returns true if either: + * 1. skb has frag_list and the device doesn't support FRAGLIST, or + * 2. skb is fragmented and the device does not support SG. + */ +static inline bool skb_needs_linearize(struct sk_buff *skb, + netdev_features_t features) +{ + return skb_is_nonlinear(skb) && + ((skb_has_frag_list(skb) && !(features & NETIF_F_FRAGLIST)) || + (skb_shinfo(skb)->nr_frags && !(features & NETIF_F_SG))); +} + static inline void skb_copy_from_linear_data(const struct sk_buff *skb, void *to, const unsigned int len)
diff --git a/net/core/dev.c b/net/core/dev.c
index ba3b7ea..fc38a36 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c@@ -2523,21 +2523,6 @@ netdev_features_t netif_skb_features(struct sk_buff *skb) } EXPORT_SYMBOL(netif_skb_features); -/* - * Returns true if either: - * 1. skb has frag_list and the device doesn't support FRAGLIST, or - * 2. skb is fragmented and the device does not support SG. - */ -static inline int skb_needs_linearize(struct sk_buff *skb, - netdev_features_t features) -{ - return skb_is_nonlinear(skb) && - ((skb_has_frag_list(skb) && - !(features & NETIF_F_FRAGLIST)) || - (skb_shinfo(skb)->nr_frags && - !(features & NETIF_F_SG))); -} - int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, struct netdev_queue *txq, void *accel_priv) {
--
1.8.3.1