dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

net: Fix 'Re: PACKET_TX_RING: packet size is too long' 

Currently PACKET_TX_RING forces certain amount of every frame to remain
unused. This probably originates from an early version of the
PACKET_TX_RING patch that in fact used the extra space when the (since
removed) CONFIG_PACKET_MMAP_ZERO_COPY option was enabled. The current
code does not make any use of this extra space.

This patch removes the extra space reservation and lets userspace make
use of the full frame size.

Signed-off-by: Gabor Gombas <gombasg@sztaki.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gabor Gombas 2009-10-29 03:19:11 -07:00 committed by David S. Miller
parent 06b71b657b
commit b5dd884e68
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/packet/af_packet.c
View File

@ -982,10 +982,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg)
goto out_put;
size_max = po->tx_ring.frame_size
- sizeof(struct skb_shared_info)
- po->tp_hdrlen
- LL_ALLOCATED_SPACE(dev)
- sizeof(struct sockaddr_ll);
- (po->tp_hdrlen - sizeof(struct sockaddr_ll));
if (size_max > dev->mtu + reserve)
size_max = dev->mtu + reserve;