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inet: frag: remove lru list

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no longer used.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2014-07-24 16:50:34 +02:00 committed by David S. Miller
parent 434d305405
commit 3fd588eb90
6 changed files with 4 additions and 44 deletions
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32
include/net/inet_frag.h
View File

@ -4,9 +4,6 @@
#include <linux/percpu_counter.h>
struct netns_frags {
struct list_head lru_list;
spinlock_t lru_lock;
/* The percpu_counter "mem" need to be cacheline aligned.
* mem.count must not share cacheline with other writers
*/
@ -21,7 +18,6 @@ struct netns_frags {
struct inet_frag_queue {
spinlock_t lock;
struct timer_list timer; /* when will this queue expire? */
struct list_head lru_list; /* lru list member */
struct hlist_node list;
atomic_t refcnt;
struct sk_buff *fragments; /* list of received fragments */
@ -91,8 +87,7 @@ void inet_frags_init_net(struct netns_frags *nf);
void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);
void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
void inet_frag_destroy(struct inet_frag_queue *q,
struct inet_frags *f, int *work);
void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f);
struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
struct inet_frags *f, void *key, unsigned int hash)
__releases(&f->lock);
@ -102,7 +97,7 @@ void inet_frag_maybe_warn_overflow(struct inet_frag_queue *q,
static inline void inet_frag_put(struct inet_frag_queue *q, struct inet_frags *f)
{
if (atomic_dec_and_test(&q->refcnt))
inet_frag_destroy(q, f, NULL);
inet_frag_destroy(q, f);
}
/* Memory Tracking Functions. */
@ -145,29 +140,6 @@ static inline unsigned int sum_frag_mem_limit(struct netns_frags *nf)
return res;
}
static inline void inet_frag_lru_move(struct inet_frag_queue *q)
{
spin_lock(&q->net->lru_lock);
if (!list_empty(&q->lru_list))
list_move_tail(&q->lru_list, &q->net->lru_list);
spin_unlock(&q->net->lru_lock);
}
static inline void inet_frag_lru_del(struct inet_frag_queue *q)
{
spin_lock(&q->net->lru_lock);
list_del_init(&q->lru_list);
spin_unlock(&q->net->lru_lock);
}
static inline void inet_frag_lru_add(struct netns_frags *nf,
struct inet_frag_queue *q)
{
spin_lock(&nf->lru_lock);
list_add_tail(&q->lru_list, &nf->lru_list);
spin_unlock(&nf->lru_lock);
}
/* RFC 3168 support :
* We want to check ECN values of all fragments, do detect invalid combinations.
* In ipq->ecn, we store the OR value of each ip4_frag_ecn() fragment value.

1
net/ieee802154/reassembly.c
View File

@ -219,7 +219,6 @@ found:
return res;
}
inet_frag_lru_move(&fq->q);
return -1;
err:
kfree_skb(skb);

12
net/ipv4/inet_fragment.c
View File

@ -194,8 +194,6 @@ EXPORT_SYMBOL(inet_frags_init);
void inet_frags_init_net(struct netns_frags *nf)
{
init_frag_mem_limit(nf);
INIT_LIST_HEAD(&nf->lru_list);
spin_lock_init(&nf->lru_lock);
}
EXPORT_SYMBOL(inet_frags_init_net);
@ -237,7 +235,6 @@ static inline void fq_unlink(struct inet_frag_queue *fq, struct inet_frags *f)
spin_unlock(&hb->chain_lock);
read_unlock(&f->lock);
inet_frag_lru_del(fq);
}
void inet_frag_kill(struct inet_frag_queue *fq, struct inet_frags *f)
@ -261,8 +258,7 @@ static inline void frag_kfree_skb(struct netns_frags *nf, struct inet_frags *f,
kfree_skb(skb);
}
void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
int *work)
void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f)
{
struct sk_buff *fp;
struct netns_frags *nf;
@ -282,14 +278,11 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
fp = xp;
}
sum = sum_truesize + f->qsize;
if (work)
*work -= sum;
sub_frag_mem_limit(q, sum);
if (f->destructor)
f->destructor(q);
kfree(q);
}
EXPORT_SYMBOL(inet_frag_destroy);
@ -333,7 +326,7 @@ static struct inet_frag_queue *inet_frag_intern(struct netns_frags *nf,
atomic_inc(&qp->refcnt);
hlist_add_head(&qp->list, &hb->chain);
inet_frag_lru_add(nf, qp);
spin_unlock(&hb->chain_lock);
read_unlock(&f->lock);
@ -361,7 +354,6 @@ static struct inet_frag_queue *inet_frag_alloc(struct netns_frags *nf,
setup_timer(&q->timer, f->frag_expire, (unsigned long)q);
spin_lock_init(&q->lock);
atomic_set(&q->refcnt, 1);
INIT_LIST_HEAD(&q->lru_list);
return q;
}

1
net/ipv4/ip_fragment.c
View File

@ -489,7 +489,6 @@ found:
}
skb_dst_drop(skb);
inet_frag_lru_move(&qp->q);
return -EINPROGRESS;
err:

1
net/ipv6/netfilter/nf_conntrack_reasm.c
View File

@ -349,7 +349,6 @@ found:
fq->q.last_in |= INET_FRAG_FIRST_IN;
}
inet_frag_lru_move(&fq->q);
return 0;
discard_fq:

1
net/ipv6/reassembly.c
View File

@ -351,7 +351,6 @@ found:
}
skb_dst_drop(skb);
inet_frag_lru_move(&fq->q);
return -1;
discard_fq: