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[IPV6]: Cleanup of net/ipv6/reassambly.c

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Two minor cleanups:

1. Using kzalloc() in fraq_alloc_queue()
   saves the memset() in ipv6_frag_create().

2. Invert sense of if-statements to streamline code.
   Inverts the comment, too.

Signed-off-by: Ingo Oeser <ioe-lkml@rameria.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ingo Oeser 2006-03-20 23:01:17 -08:00 committed by David S. Miller
parent b3e83d6d18
commit 78c784c47a
1 changed files with 17 additions and 18 deletions
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35
net/ipv6/reassembly.c
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@ -203,7 +203,7 @@ static inline void frag_free_queue(struct frag_queue *fq, int *work)
static inline struct frag_queue *frag_alloc_queue(void)
{
struct frag_queue *fq = kmalloc(sizeof(struct frag_queue), GFP_ATOMIC);
struct frag_queue *fq = kzalloc(sizeof(struct frag_queue), GFP_ATOMIC);
if(!fq)
return NULL;
@ -288,6 +288,7 @@ static void ip6_evictor(void)
static void ip6_frag_expire(unsigned long data)
{
struct frag_queue *fq = (struct frag_queue *) data;
struct net_device *dev;
spin_lock(&fq->lock);
@ -299,22 +300,22 @@ static void ip6_frag_expire(unsigned long data)
IP6_INC_STATS_BH(IPSTATS_MIB_REASMTIMEOUT);
IP6_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
/* Send error only if the first segment arrived. */
if (fq->last_in&FIRST_IN && fq->fragments) {
struct net_device *dev = dev_get_by_index(fq->iif);
/* Don't send error if the first segment did not arrive. */
if (!(fq->last_in&FIRST_IN) || !fq->fragments)
goto out;
/*
But use as source device on which LAST ARRIVED
segment was received. And do not use fq->dev
pointer directly, device might already disappeared.
*/
if (dev) {
fq->fragments->dev = dev;
icmpv6_send(fq->fragments, ICMPV6_TIME_EXCEED, ICMPV6_EXC_FRAGTIME, 0,
dev);
dev_put(dev);
}
}
dev = dev_get_by_index(fq->iif);
if (!dev)
goto out;
/*
But use as source device on which LAST ARRIVED
segment was received. And do not use fq->dev
pointer directly, device might already disappeared.
*/
fq->fragments->dev = dev;
icmpv6_send(fq->fragments, ICMPV6_TIME_EXCEED, ICMPV6_EXC_FRAGTIME, 0, dev);
dev_put(dev);
out:
spin_unlock(&fq->lock);
fq_put(fq, NULL);
@ -368,8 +369,6 @@ ip6_frag_create(unsigned int hash, u32 id, struct in6_addr *src, struct in6_addr
if ((fq = frag_alloc_queue()) == NULL)
goto oom;
memset(fq, 0, sizeof(struct frag_queue));
fq->id = id;
ipv6_addr_copy(&fq->saddr, src);
ipv6_addr_copy(&fq->daddr, dst);