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author | Herbert Xu <herbert@gondor.apana.org.au> | 2011-11-18 02:20:04 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2011-11-18 14:37:09 -0500 |
commit | ae641949df01b85117845bec45328eab6d6fada1 (patch) | |
tree | ed8d5aedd678f86e8554dc0b1c080a43ef4b331d /net | |
parent | a7ae1992248e5cf9dc5bd35695ab846d27efe15f (diff) | |
download | kernel_goldelico_gta04-ae641949df01b85117845bec45328eab6d6fada1.zip kernel_goldelico_gta04-ae641949df01b85117845bec45328eab6d6fada1.tar.gz kernel_goldelico_gta04-ae641949df01b85117845bec45328eab6d6fada1.tar.bz2 |
net: Remove all uses of LL_ALLOCATED_SPACE
net: Remove all uses of LL_ALLOCATED_SPACE
The macro LL_ALLOCATED_SPACE was ill-conceived. It applies the
alignment to the sum of needed_headroom and needed_tailroom. As
the amount that is then reserved for head room is needed_headroom
with alignment, this means that the tail room left may be too small.
This patch replaces all uses of LL_ALLOCATED_SPACE with the macro
LL_RESERVED_SPACE and direct reference to needed_tailroom.
This also fixes the problem with needed_headroom changing between
allocating the skb and reserving the head room.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/core/netpoll.c | 6 | ||||
-rw-r--r-- | net/econet/af_econet.c | 7 | ||||
-rw-r--r-- | net/ieee802154/dgram.c | 7 | ||||
-rw-r--r-- | net/ieee802154/raw.c | 7 | ||||
-rw-r--r-- | net/packet/af_packet.c | 18 |
5 files changed, 30 insertions, 15 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index cf64c1f..1a7d8e2 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -422,6 +422,7 @@ static void arp_reply(struct sk_buff *skb) struct sk_buff *send_skb; struct netpoll *np, *tmp; unsigned long flags; + int hlen, tlen; int hits = 0; if (list_empty(&npinfo->rx_np)) @@ -479,8 +480,9 @@ static void arp_reply(struct sk_buff *skb) if (tip != np->local_ip) continue; - send_skb = find_skb(np, size + LL_ALLOCATED_SPACE(np->dev), - LL_RESERVED_SPACE(np->dev)); + hlen = LL_RESERVED_SPACE(np->dev); + tlen = np->dev->needed_tailroom; + send_skb = find_skb(np, size + hlen + tlen, hlen); if (!send_skb) continue; diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c index 1c1f26c..7e717cb 100644 --- a/net/econet/af_econet.c +++ b/net/econet/af_econet.c @@ -322,6 +322,7 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock, /* Real hardware Econet. We're not worthy etc. */ #ifdef CONFIG_ECONET_NATIVE unsigned short proto = 0; + int hlen, tlen; int res; if (len + 15 > dev->mtu) { @@ -331,12 +332,14 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock, dev_hold(dev); - skb = sock_alloc_send_skb(sk, len + LL_ALLOCATED_SPACE(dev), + hlen = LL_RESERVED_SPACE(dev); + tlen = dev->needed_tailroom; + skb = sock_alloc_send_skb(sk, len + hlen + tlen, msg->msg_flags & MSG_DONTWAIT, &err); if (skb == NULL) goto out_unlock; - skb_reserve(skb, LL_RESERVED_SPACE(dev)); + skb_reserve(skb, hlen); skb_reset_network_header(skb); eb = (struct ec_cb *)&skb->cb; diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c index faecf64..1b09eaa 100644 --- a/net/ieee802154/dgram.c +++ b/net/ieee802154/dgram.c @@ -209,6 +209,7 @@ static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk, unsigned mtu; struct sk_buff *skb; struct dgram_sock *ro = dgram_sk(sk); + int hlen, tlen; int err; if (msg->msg_flags & MSG_OOB) { @@ -229,13 +230,15 @@ static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk, mtu = dev->mtu; pr_debug("name = %s, mtu = %u\n", dev->name, mtu); - skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size, + hlen = LL_RESERVED_SPACE(dev); + tlen = dev->needed_tailroom; + skb = sock_alloc_send_skb(sk, hlen + tlen + size, msg->msg_flags & MSG_DONTWAIT, &err); if (!skb) goto out_dev; - skb_reserve(skb, LL_RESERVED_SPACE(dev)); + skb_reserve(skb, hlen); skb_reset_network_header(skb); diff --git a/net/ieee802154/raw.c b/net/ieee802154/raw.c index 10970ca..f96bae8 100644 --- a/net/ieee802154/raw.c +++ b/net/ieee802154/raw.c @@ -108,6 +108,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, struct net_device *dev; unsigned mtu; struct sk_buff *skb; + int hlen, tlen; int err; if (msg->msg_flags & MSG_OOB) { @@ -137,12 +138,14 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, goto out_dev; } - skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size, + hlen = LL_RESERVED_SPACE(dev); + tlen = dev->needed_tailroom; + skb = sock_alloc_send_skb(sk, hlen + tlen + size, msg->msg_flags & MSG_DONTWAIT, &err); if (!skb) goto out_dev; - skb_reserve(skb, LL_RESERVED_SPACE(dev)); + skb_reserve(skb, hlen); skb_reset_mac_header(skb); skb_reset_network_header(skb); diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 82a6f34..71c1a75 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1944,7 +1944,7 @@ static void tpacket_destruct_skb(struct sk_buff *skb) static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, void *frame, struct net_device *dev, int size_max, - __be16 proto, unsigned char *addr) + __be16 proto, unsigned char *addr, int hlen) { union { struct tpacket_hdr *h1; @@ -1978,7 +1978,7 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, return -EMSGSIZE; } - skb_reserve(skb, LL_RESERVED_SPACE(dev)); + skb_reserve(skb, hlen); skb_reset_network_header(skb); data = ph.raw + po->tp_hdrlen - sizeof(struct sockaddr_ll); @@ -2053,6 +2053,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) unsigned char *addr; int len_sum = 0; int status = 0; + int hlen, tlen; mutex_lock(&po->pg_vec_lock); @@ -2101,16 +2102,17 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) } status = TP_STATUS_SEND_REQUEST; + hlen = LL_RESERVED_SPACE(dev); + tlen = dev->needed_tailroom; skb = sock_alloc_send_skb(&po->sk, - LL_ALLOCATED_SPACE(dev) - + sizeof(struct sockaddr_ll), + hlen + tlen + sizeof(struct sockaddr_ll), 0, &err); if (unlikely(skb == NULL)) goto out_status; tp_len = tpacket_fill_skb(po, skb, ph, dev, size_max, proto, - addr); + addr, hlen); if (unlikely(tp_len < 0)) { if (po->tp_loss) { @@ -2207,6 +2209,7 @@ static int packet_snd(struct socket *sock, int vnet_hdr_len; struct packet_sock *po = pkt_sk(sk); unsigned short gso_type = 0; + int hlen, tlen; /* * Get and verify the address. @@ -2291,8 +2294,9 @@ static int packet_snd(struct socket *sock, goto out_unlock; err = -ENOBUFS; - skb = packet_alloc_skb(sk, LL_ALLOCATED_SPACE(dev), - LL_RESERVED_SPACE(dev), len, vnet_hdr.hdr_len, + hlen = LL_RESERVED_SPACE(dev); + tlen = dev->needed_tailroom; + skb = packet_alloc_skb(sk, hlen + tlen, hlen, len, vnet_hdr.hdr_len, msg->msg_flags & MSG_DONTWAIT, &err); if (skb == NULL) goto out_unlock; |