#include <linux/percpu_counter.h>
struct netns_frags {
- int nqueues;
- 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
*/
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 */
int meat;
__u8 last_in; /* first/last segment arrived? */
+#define INET_FRAG_EVICTED 8
#define INET_FRAG_COMPLETE 4
#define INET_FRAG_FIRST_IN 2
#define INET_FRAG_LAST_IN 1
* rounded up (SKB_TRUELEN(0) + sizeof(struct ipq or
* struct frag_queue))
*/
-#define INETFRAGS_MAXDEPTH 128
+#define INETFRAGS_MAXDEPTH 128
struct inet_frag_bucket {
struct hlist_head chain;
int secret_interval;
struct timer_list secret_timer;
+ struct work_struct frags_work;
+ unsigned int next_bucket;
+
/* The first call to hashfn is responsible to initialize
* rnd. This is best done with net_get_random_once.
*/
u32 rnd;
int qsize;
- unsigned int (*hashfn)(struct inet_frag_queue *);
- bool (*match)(struct inet_frag_queue *q, void *arg);
+ unsigned int (*hashfn)(const struct inet_frag_queue *);
+ bool (*match)(const struct inet_frag_queue *q,
+ const void *arg);
void (*constructor)(struct inet_frag_queue *q,
- void *arg);
+ const void *arg);
void (*destructor)(struct inet_frag_queue *);
void (*skb_free)(struct sk_buff *);
void (*frag_expire)(unsigned long data);
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);
-int inet_frag_evictor(struct netns_frags *nf, struct inet_frags *f, bool force);
+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);
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. */
percpu_counter_init(&nf->mem, 0);
}
-static inline int sum_frag_mem_limit(struct netns_frags *nf)
+static inline unsigned int sum_frag_mem_limit(struct netns_frags *nf)
{
- int res;
+ unsigned int res;
local_bh_disable();
res = percpu_counter_sum_positive(&nf->mem);
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);
- q->net->nqueues--;
- 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);
- q->net->nqueues++;
- 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.