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| author | Daniel Borkmann <dborkman@redhat.com> | 2013-12-06 11:36:16 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-09 20:23:33 -0500 |
| commit | 4262e5ccbbb5171abd2921eed16ed339633d6478 (patch) | |
| tree | 20b11bfb690a4ab70c726f81a1f0826eb5a939f0 /include/linux/skbuff.h | |
| parent | 34f9f437104b86f6ddfa2770e2cd852846385dc3 (diff) | |
| download | lwn-4262e5ccbbb5171abd2921eed16ed339633d6478.tar.gz lwn-4262e5ccbbb5171abd2921eed16ed339633d6478.zip | |
net: dev: move inline skb_needs_linearize helper to header
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 <dborkman@redhat.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 215b5ea1cb30..77c7aae1c6b2 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2392,6 +2392,24 @@ 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) |