[RFC PATCH V2 2/5] Add a new device flag for zero copy
From: Shirley Ma <hidden>
Date: 2010-12-10 09:58:03
Also in:
kvm, lkml
Subsystem:
networking drivers, networking [general], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Signed-off-by: Shirley Ma <redacted> --- include/linux/netdevice.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d8fd2c2..7207665 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h@@ -857,6 +857,9 @@ struct net_device { #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ +/* bit 29 is for device to map userspace buffers -- zerocopy */ +#define NETIF_F_ZEROCOPY (1 << 29) + /* Segmentation offload features */ #define NETIF_F_GSO_SHIFT 16 #define NETIF_F_GSO_MASK 0x00ff0000