diff options
author | Herbert Xu <herbert@gondor.apana.org.au> | 2015-02-03 20:33:25 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2015-02-05 04:34:53 (GMT) |
commit | 9a7766288274ef765245ed65e6176a2727b96706 (patch) | |
tree | 2095e94d014d0c0a195b487086c336de86269f92 /net/netfilter | |
parent | 56d28b1e921b57b918a0ae6b13a1671115fe788d (diff) | |
download | linux-9a7766288274ef765245ed65e6176a2727b96706.tar.xz |
netfilter: Use rhashtable walk iterator
This patch gets rid of the manual rhashtable walk in nft_hash
which touches rhashtable internals that should not be exposed.
It does so by using the rhashtable iterator primitives.
Note that I'm leaving nft_hash_destroy alone since it's only
invoked on shutdown and it shouldn't be affected by changes
to rhashtable internals (or at least not what I'm planning to
change).
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter')
-rw-r--r-- | net/netfilter/nft_hash.c | 53 |
1 files changed, 36 insertions, 17 deletions
diff --git a/net/netfilter/nft_hash.c b/net/netfilter/nft_hash.c index 75887d7..61e6c40 100644 --- a/net/netfilter/nft_hash.c +++ b/net/netfilter/nft_hash.c @@ -130,31 +130,50 @@ static void nft_hash_walk(const struct nft_ctx *ctx, const struct nft_set *set, struct nft_set_iter *iter) { struct rhashtable *priv = nft_set_priv(set); - const struct bucket_table *tbl; const struct nft_hash_elem *he; + struct rhashtable_iter hti; struct nft_set_elem elem; - unsigned int i; + int err; - tbl = rht_dereference_rcu(priv->tbl, priv); - for (i = 0; i < tbl->size; i++) { - struct rhash_head *pos; + err = rhashtable_walk_init(priv, &hti); + iter->err = err; + if (err) + return; + + err = rhashtable_walk_start(&hti); + if (err && err != -EAGAIN) { + iter->err = err; + goto out; + } - rht_for_each_entry_rcu(he, pos, tbl, i, node) { - if (iter->count < iter->skip) - goto cont; + while ((he = rhashtable_walk_next(&hti))) { + if (IS_ERR(he)) { + err = PTR_ERR(he); + if (err != -EAGAIN) { + iter->err = err; + goto out; + } + } + + if (iter->count < iter->skip) + goto cont; + + memcpy(&elem.key, &he->key, sizeof(elem.key)); + if (set->flags & NFT_SET_MAP) + memcpy(&elem.data, he->data, sizeof(elem.data)); + elem.flags = 0; - memcpy(&elem.key, &he->key, sizeof(elem.key)); - if (set->flags & NFT_SET_MAP) - memcpy(&elem.data, he->data, sizeof(elem.data)); - elem.flags = 0; + iter->err = iter->fn(ctx, set, iter, &elem); + if (iter->err < 0) + goto out; - iter->err = iter->fn(ctx, set, iter, &elem); - if (iter->err < 0) - return; cont: - iter->count++; - } + iter->count++; } + +out: + rhashtable_walk_stop(&hti); + rhashtable_walk_exit(&hti); } static unsigned int nft_hash_privsize(const struct nlattr * const nla[]) |