diff options
Diffstat (limited to 'include/net/inet_frag.h')
| -rw-r--r-- | include/net/inet_frag.h | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h index 378904ee9129..010f26b31c89 100644 --- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -3,19 +3,24 @@ #define __NET_FRAG_H__ #include <linux/rhashtable-types.h> +#include <linux/completion.h> -struct netns_frags { +/* Per netns frag queues directory */ +struct fqdir { /* sysctls */ long high_thresh; long low_thresh; int timeout; int max_dist; struct inet_frags *f; + struct net *net; + bool dead; struct rhashtable rhashtable ____cacheline_aligned_in_smp; /* Keep atomic mem on separate cachelines in structs that include it */ atomic_long_t mem ____cacheline_aligned_in_smp; + struct work_struct destroy_work; }; /** @@ -24,11 +29,13 @@ struct netns_frags { * @INET_FRAG_FIRST_IN: first fragment has arrived * @INET_FRAG_LAST_IN: final fragment has arrived * @INET_FRAG_COMPLETE: frag queue has been processed and is due for destruction + * @INET_FRAG_HASH_DEAD: inet_frag_kill() has not removed fq from rhashtable */ enum { INET_FRAG_FIRST_IN = BIT(0), INET_FRAG_LAST_IN = BIT(1), INET_FRAG_COMPLETE = BIT(2), + INET_FRAG_HASH_DEAD = BIT(3), }; struct frag_v4_compare_key { @@ -64,7 +71,7 @@ struct frag_v6_compare_key { * @meat: length of received fragments so far * @flags: fragment queue flags * @max_size: maximum received fragment size - * @net: namespace that this frag belongs to + * @fqdir: pointer to struct fqdir * @rcu: rcu head for freeing deferall */ struct inet_frag_queue { @@ -84,7 +91,7 @@ struct inet_frag_queue { int meat; __u8 flags; u16 max_size; - struct netns_frags *net; + struct fqdir *fqdir; struct rcu_head rcu; }; @@ -98,21 +105,25 @@ struct inet_frags { struct kmem_cache *frags_cachep; const char *frags_cache_name; struct rhashtable_params rhash_params; + refcount_t refcnt; + struct completion completion; }; int inet_frags_init(struct inet_frags *); void inet_frags_fini(struct inet_frags *); -static inline int inet_frags_init_net(struct netns_frags *nf) +int fqdir_init(struct fqdir **fqdirp, struct inet_frags *f, struct net *net); + +static inline void fqdir_pre_exit(struct fqdir *fqdir) { - atomic_long_set(&nf->mem, 0); - return rhashtable_init(&nf->rhashtable, &nf->f->rhash_params); + fqdir->high_thresh = 0; /* prevent creation of new frags */ + fqdir->dead = true; } -void inet_frags_exit_net(struct netns_frags *nf); +void fqdir_exit(struct fqdir *fqdir); void inet_frag_kill(struct inet_frag_queue *q); void inet_frag_destroy(struct inet_frag_queue *q); -struct inet_frag_queue *inet_frag_find(struct netns_frags *nf, void *key); +struct inet_frag_queue *inet_frag_find(struct fqdir *fqdir, void *key); /* Free all skbs in the queue; return the sum of their truesizes. */ unsigned int inet_frag_rbtree_purge(struct rb_root *root); @@ -125,19 +136,19 @@ static inline void inet_frag_put(struct inet_frag_queue *q) /* Memory Tracking Functions. */ -static inline long frag_mem_limit(const struct netns_frags *nf) +static inline long frag_mem_limit(const struct fqdir *fqdir) { - return atomic_long_read(&nf->mem); + return atomic_long_read(&fqdir->mem); } -static inline void sub_frag_mem_limit(struct netns_frags *nf, long val) +static inline void sub_frag_mem_limit(struct fqdir *fqdir, long val) { - atomic_long_sub(val, &nf->mem); + atomic_long_sub(val, &fqdir->mem); } -static inline void add_frag_mem_limit(struct netns_frags *nf, long val) +static inline void add_frag_mem_limit(struct fqdir *fqdir, long val) { - atomic_long_add(val, &nf->mem); + atomic_long_add(val, &fqdir->mem); } /* RFC 3168 support : |