diff options
Diffstat (limited to 'include/net/inet_frag.h')
| -rw-r--r-- | include/net/inet_frag.h | 70 |
1 files changed, 21 insertions, 49 deletions
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h index 6f59de98dabd..6f4930a0b660 100644 --- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -4,10 +4,6 @@ #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 */ @@ -22,7 +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 */ @@ -32,6 +27,7 @@ struct inet_frag_queue { 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 @@ -48,7 +44,7 @@ struct inet_frag_queue { * 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; @@ -57,24 +53,27 @@ struct inet_frag_bucket { struct inet_frags { struct inet_frag_bucket hash[INETFRAGS_HASHSZ]; - /* This rwlock is a global lock (seperate per IPv4, IPv6 and - * netfilter). Important to keep this on a seperate cacheline. - * Its primarily a rebuild protection rwlock. - */ - rwlock_t lock ____cacheline_aligned_in_smp; - int secret_interval; - struct timer_list secret_timer; + + struct work_struct frags_work; + unsigned int next_bucket; + unsigned long last_rebuild_jiffies; + bool rebuild; /* The first call to hashfn is responsible to initialize * rnd. This is best done with net_get_random_once. + * + * rnd_seqlock is used to let hash insertion detect + * when it needs to re-lookup the hash chain to use. */ u32 rnd; + seqlock_t rnd_seqlock; 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); @@ -87,19 +86,17 @@ 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); -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); + struct inet_frags *f, void *key, unsigned int hash); + void inet_frag_maybe_warn_overflow(struct inet_frag_queue *q, const char *prefix); 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. */ @@ -131,9 +128,9 @@ static inline void init_frag_mem_limit(struct netns_frags *nf) 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); @@ -142,31 +139,6 @@ static inline 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); - 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. |