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| author | Andrew Gallatin <gallatin@myri.com> | 2007-12-05 02:31:42 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-12-05 05:37:32 -0800 |
| commit | 621544eb8c3beaa859c75850f816dd9b056a00a3 (patch) | |
| tree | 15c4375c8899ced48bd751eb139cfe9b3778bda9 | |
| parent | 4e67d876ce07471e02be571038d5435a825f0215 (diff) | |
| download | linux-stable-621544eb8c3beaa859c75850f816dd9b056a00a3.tar.gz linux-stable-621544eb8c3beaa859c75850f816dd9b056a00a3.tar.bz2 linux-stable-621544eb8c3beaa859c75850f816dd9b056a00a3.zip | |
[LRO]: fix lro_gen_skb() alignment
Add a field to the lro_mgr struct so that drivers can specify how much
padding is required to align layer 3 headers when a packet is copied
into a freshly allocated skb by inet_lro.c:lro_gen_skb(). Without
padding, skbs generated by LRO will cause alignment warnings on
architectures which require strict alignment (seen on sparc64).
Myri10GE is updated to use this field.
Signed-off-by: Andrew Gallatin <gallatin@myri.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/myri10ge/myri10ge.c | 1 | ||||
| -rw-r--r-- | include/linux/inet_lro.h | 3 | ||||
| -rw-r--r-- | net/ipv4/inet_lro.c | 3 |
3 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c index 0f306ddb5630..8def8657251f 100644 --- a/drivers/net/myri10ge/myri10ge.c +++ b/drivers/net/myri10ge/myri10ge.c @@ -1979,6 +1979,7 @@ static int myri10ge_open(struct net_device *dev) lro_mgr->lro_arr = mgp->rx_done.lro_desc; lro_mgr->get_frag_header = myri10ge_get_frag_header; lro_mgr->max_aggr = myri10ge_lro_max_pkts; + lro_mgr->frag_align_pad = 2; if (lro_mgr->max_aggr > MAX_SKB_FRAGS) lro_mgr->max_aggr = MAX_SKB_FRAGS; diff --git a/include/linux/inet_lro.h b/include/linux/inet_lro.h index 1246d46abbc0..80335b7d77c5 100644 --- a/include/linux/inet_lro.h +++ b/include/linux/inet_lro.h @@ -91,6 +91,9 @@ struct net_lro_mgr { int max_desc; /* Max number of LRO descriptors */ int max_aggr; /* Max number of LRO packets to be aggregated */ + int frag_align_pad; /* Padding required to properly align layer 3 + * headers in generated skb when using frags */ + struct net_lro_desc *lro_arr; /* Array of LRO descriptors */ /* diff --git a/net/ipv4/inet_lro.c b/net/ipv4/inet_lro.c index ac3b1d3dba2e..9a96c277393d 100644 --- a/net/ipv4/inet_lro.c +++ b/net/ipv4/inet_lro.c @@ -401,10 +401,11 @@ static struct sk_buff *lro_gen_skb(struct net_lro_mgr *lro_mgr, int data_len = len; int hdr_len = min(len, hlen); - skb = netdev_alloc_skb(lro_mgr->dev, hlen); + skb = netdev_alloc_skb(lro_mgr->dev, hlen + lro_mgr->frag_align_pad); if (!skb) return NULL; + skb_reserve(skb, lro_mgr->frag_align_pad); skb->len = len; skb->data_len = len - hdr_len; skb->truesize += true_size; |