From: Jack Morgenstein Date: Mon, 29 May 2006 16:14:05 +0000 (+0300) Subject: IPoIB: Fix kernel unaligned access on ia64 X-Git-Tag: v2.6.18-rc1~1110^2~20 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37c22a77212c13201497378cc8becc5c95d0f3f5;p=linux-2.6 IPoIB: Fix kernel unaligned access on ia64 Fix misaligned access faults on ia64: never cast a misaligned neighbour->ha + 4 pointer to union ib_gid type; pass a void * pointer instead. The memcpy was being optimized to use full word accesses because the compiler thought that union ib_gid is always aligned. The cast in IPOIB_GID_ARG is safe, since it is fixed to access each byte separately. Signed-off-by: Jack Morgenstein Signed-off-by: Michael S. Tsirkin Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h index 12a1e0572e..491d2afaf5 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib.h +++ b/drivers/infiniband/ulp/ipoib/ipoib.h @@ -272,8 +272,7 @@ int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port); void ipoib_dev_cleanup(struct net_device *dev); void ipoib_mcast_join_task(void *dev_ptr); -void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, - struct sk_buff *skb); +void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb); void ipoib_mcast_restart_task(void *dev_ptr); int ipoib_mcast_start_thread(struct net_device *dev); @@ -369,15 +368,26 @@ extern int ipoib_debug_level; #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */ -#define IPOIB_GID_FMT "%x:%x:%x:%x:%x:%x:%x:%x" - -#define IPOIB_GID_ARG(gid) be16_to_cpup((__be16 *) ((gid).raw + 0)), \ - be16_to_cpup((__be16 *) ((gid).raw + 2)), \ - be16_to_cpup((__be16 *) ((gid).raw + 4)), \ - be16_to_cpup((__be16 *) ((gid).raw + 6)), \ - be16_to_cpup((__be16 *) ((gid).raw + 8)), \ - be16_to_cpup((__be16 *) ((gid).raw + 10)), \ - be16_to_cpup((__be16 *) ((gid).raw + 12)), \ - be16_to_cpup((__be16 *) ((gid).raw + 14)) +#define IPOIB_GID_FMT "%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x:" \ + "%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x:%2.2x%2.2x" + +#define IPOIB_GID_RAW_ARG(gid) ((u8 *)(gid))[0], \ + ((u8 *)(gid))[1], \ + ((u8 *)(gid))[2], \ + ((u8 *)(gid))[3], \ + ((u8 *)(gid))[4], \ + ((u8 *)(gid))[5], \ + ((u8 *)(gid))[6], \ + ((u8 *)(gid))[7], \ + ((u8 *)(gid))[8], \ + ((u8 *)(gid))[9], \ + ((u8 *)(gid))[10],\ + ((u8 *)(gid))[11],\ + ((u8 *)(gid))[12],\ + ((u8 *)(gid))[13],\ + ((u8 *)(gid))[14],\ + ((u8 *)(gid))[15] + +#define IPOIB_GID_ARG(gid) IPOIB_GID_RAW_ARG((gid).raw) #endif /* _IPOIB_H */ diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index cb078a7d0b..1c6ea1c682 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -185,8 +185,7 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu) return 0; } -static struct ipoib_path *__path_find(struct net_device *dev, - union ib_gid *gid) +static struct ipoib_path *__path_find(struct net_device *dev, void *gid) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct rb_node *n = priv->path_tree.rb_node; @@ -196,7 +195,7 @@ static struct ipoib_path *__path_find(struct net_device *dev, while (n) { path = rb_entry(n, struct ipoib_path, rb_node); - ret = memcmp(gid->raw, path->pathrec.dgid.raw, + ret = memcmp(gid, path->pathrec.dgid.raw, sizeof (union ib_gid)); if (ret < 0) @@ -424,8 +423,7 @@ static void path_rec_completion(int status, } } -static struct ipoib_path *path_rec_create(struct net_device *dev, - union ib_gid *gid) +static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_path *path; @@ -440,7 +438,7 @@ static struct ipoib_path *path_rec_create(struct net_device *dev, INIT_LIST_HEAD(&path->neigh_list); - memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid)); + memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid)); path->pathrec.sgid = priv->local_gid; path->pathrec.pkey = cpu_to_be16(priv->pkey); path->pathrec.numb_path = 1; @@ -498,10 +496,9 @@ static void neigh_add_path(struct sk_buff *skb, struct net_device *dev) */ spin_lock(&priv->lock); - path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4)); + path = __path_find(dev, skb->dst->neighbour->ha + 4); if (!path) { - path = path_rec_create(dev, - (union ib_gid *) (skb->dst->neighbour->ha + 4)); + path = path_rec_create(dev, skb->dst->neighbour->ha + 4); if (!path) goto err_path; @@ -551,7 +548,7 @@ static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev) /* Add in the P_Key for multicasts */ skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff; skb->dst->neighbour->ha[9] = priv->pkey & 0xff; - ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb); + ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb); } static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, @@ -566,10 +563,9 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev, */ spin_lock(&priv->lock); - path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4)); + path = __path_find(dev, phdr->hwaddr + 4); if (!path) { - path = path_rec_create(dev, - (union ib_gid *) (phdr->hwaddr + 4)); + path = path_rec_create(dev, phdr->hwaddr + 4); if (path) { /* put pseudoheader back on for next time */ skb_push(skb, sizeof *phdr); @@ -660,7 +656,7 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff; phdr->hwaddr[9] = priv->pkey & 0xff; - ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb); + ipoib_mcast_send(dev, phdr->hwaddr + 4, skb); } else { /* unicast GID -- should be ARP or RARP reply */ @@ -671,7 +667,7 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev) skb->dst ? "neigh" : "dst", be16_to_cpup((__be16 *) skb->data), be32_to_cpup((__be32 *) phdr->hwaddr), - IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4))); + IPOIB_GID_RAW_ARG(phdr->hwaddr + 4)); dev_kfree_skb_any(skb); ++priv->stats.tx_dropped; goto out; @@ -754,7 +750,7 @@ static void ipoib_neigh_destructor(struct neighbour *n) ipoib_dbg(priv, "neigh_destructor for %06x " IPOIB_GID_FMT "\n", be32_to_cpup((__be32 *) n->ha), - IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4)))); + IPOIB_GID_RAW_ARG(n->ha + 4)); spin_lock_irqsave(&priv->lock, flags); diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index 1dae4b2382..ec41c8f46c 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -154,7 +154,7 @@ static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, return mcast; } -static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid) +static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct rb_node *n = priv->multicast_tree.rb_node; @@ -165,7 +165,7 @@ static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_g mcast = rb_entry(n, struct ipoib_mcast, rb_node); - ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw, + ret = memcmp(mgid, mcast->mcmember.mgid.raw, sizeof (union ib_gid)); if (ret < 0) n = n->rb_left; @@ -694,8 +694,7 @@ static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) return 0; } -void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, - struct sk_buff *skb) +void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb) { struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_mcast *mcast; @@ -718,7 +717,7 @@ void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, if (!mcast) { /* Let's create a new send only group now */ ipoib_dbg_mcast(priv, "setting up send only multicast group for " - IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid)); + IPOIB_GID_FMT "\n", IPOIB_GID_RAW_ARG(mgid)); mcast = ipoib_mcast_alloc(dev, 0); if (!mcast) { @@ -730,7 +729,7 @@ void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, } set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); - mcast->mcmember.mgid = *mgid; + memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid)); __ipoib_mcast_add(dev, mcast); list_add_tail(&mcast->list, &priv->multicast_list); }