From 321a3a99e4717b960e21c62fc6a140d21453df7f Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Mon, 15 Oct 2007 02:38:08 -0700 Subject: [PATCH] [INET]: Consolidate xxx_the secret_rebuild This code works with the generic data types as well, so move this into inet_fragment.c This move makes it possible to hide the secret_timer management and the secret_rebuild routine completely in the inet_fragment.c Introduce the ->hashfn() callback in inet_frags() to get the hashfun for a given inet_frag_queue() object. Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller --- include/net/inet_frag.h | 2 ++ net/ipv4/inet_fragment.c | 35 +++++++++++++++++++++++ net/ipv4/ip_fragment.c | 34 ++++------------------- net/ipv6/netfilter/nf_conntrack_reasm.c | 34 ++++------------------- net/ipv6/reassembly.c | 37 ++++--------------------- 5 files changed, 52 insertions(+), 90 deletions(-) diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h index 9902363f5b..e374412ff4 100644 --- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -36,6 +36,8 @@ struct inet_frags { atomic_t mem; struct timer_list secret_timer; struct inet_frags_ctl *ctl; + + unsigned int (*hashfn)(struct inet_frag_queue *); }; void inet_frags_init(struct inet_frags *); diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c index 534eaa8cdc..ec10e05c66 100644 --- a/net/ipv4/inet_fragment.c +++ b/net/ipv4/inet_fragment.c @@ -16,9 +16,38 @@ #include #include #include +#include #include +static void inet_frag_secret_rebuild(unsigned long dummy) +{ + struct inet_frags *f = (struct inet_frags *)dummy; + unsigned long now = jiffies; + int i; + + write_lock(&f->lock); + get_random_bytes(&f->rnd, sizeof(u32)); + for (i = 0; i < INETFRAGS_HASHSZ; i++) { + struct inet_frag_queue *q; + struct hlist_node *p, *n; + + hlist_for_each_entry_safe(q, p, n, &f->hash[i], list) { + unsigned int hval = f->hashfn(q); + + if (hval != i) { + hlist_del(&q->list); + + /* Relink to new hash chain. */ + hlist_add_head(&q->list, &f->hash[hval]); + } + } + } + write_unlock(&f->lock); + + mod_timer(&f->secret_timer, now + f->ctl->secret_interval); +} + void inet_frags_init(struct inet_frags *f) { int i; @@ -35,11 +64,17 @@ void inet_frags_init(struct inet_frags *f) f->nqueues = 0; atomic_set(&f->mem, 0); + init_timer(&f->secret_timer); + f->secret_timer.function = inet_frag_secret_rebuild; + f->secret_timer.data = (unsigned long)f; + f->secret_timer.expires = jiffies + f->ctl->secret_interval; + add_timer(&f->secret_timer); } EXPORT_SYMBOL(inet_frags_init); void inet_frags_fini(struct inet_frags *f) { + del_timer(&f->secret_timer); } EXPORT_SYMBOL(inet_frags_fini); diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index 7416c05dd3..e231c248ae 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -115,32 +115,12 @@ static unsigned int ipqhashfn(__be16 id, __be32 saddr, __be32 daddr, u8 prot) ip4_frags.rnd) & (INETFRAGS_HASHSZ - 1); } -static void ipfrag_secret_rebuild(unsigned long dummy) +static unsigned int ip4_hashfn(struct inet_frag_queue *q) { - unsigned long now = jiffies; - int i; + struct ipq *ipq; - write_lock(&ip4_frags.lock); - get_random_bytes(&ip4_frags.rnd, sizeof(u32)); - for (i = 0; i < INETFRAGS_HASHSZ; i++) { - struct ipq *q; - struct hlist_node *p, *n; - - hlist_for_each_entry_safe(q, p, n, &ip4_frags.hash[i], q.list) { - unsigned int hval = ipqhashfn(q->id, q->saddr, - q->daddr, q->protocol); - - if (hval != i) { - hlist_del(&q->q.list); - - /* Relink to new hash chain. */ - hlist_add_head(&q->q.list, &ip4_frags.hash[hval]); - } - } - } - write_unlock(&ip4_frags.lock); - - mod_timer(&ip4_frags.secret_timer, now + ip4_frags_ctl.secret_interval); + ipq = container_of(q, struct ipq, q); + return ipqhashfn(ipq->id, ipq->saddr, ipq->daddr, ipq->protocol); } /* Memory Tracking Functions. */ @@ -739,12 +719,8 @@ int ip_defrag(struct sk_buff *skb, u32 user) void __init ipfrag_init(void) { - init_timer(&ip4_frags.secret_timer); - ip4_frags.secret_timer.function = ipfrag_secret_rebuild; - ip4_frags.secret_timer.expires = jiffies + ip4_frags_ctl.secret_interval; - add_timer(&ip4_frags.secret_timer); - ip4_frags.ctl = &ip4_frags_ctl; + ip4_frags.hashfn = ip4_hashfn; inet_frags_init(&ip4_frags); } diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c index 2ebe515d91..a3aef387bc 100644 --- a/net/ipv6/netfilter/nf_conntrack_reasm.c +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c @@ -106,32 +106,12 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr, return c & (INETFRAGS_HASHSZ - 1); } -static void nf_ct_frag6_secret_rebuild(unsigned long dummy) +static unsigned int nf_hashfn(struct inet_frag_queue *q) { - unsigned long now = jiffies; - int i; + struct nf_ct_frag6_queue *nq; - write_lock(&nf_frags.lock); - get_random_bytes(&nf_frags.rnd, sizeof(u32)); - for (i = 0; i < INETFRAGS_HASHSZ; i++) { - struct nf_ct_frag6_queue *q; - struct hlist_node *p, *n; - - hlist_for_each_entry_safe(q, p, n, &nf_frags.hash[i], q.list) { - unsigned int hval = ip6qhashfn(q->id, - &q->saddr, - &q->daddr); - if (hval != i) { - hlist_del(&q->q.list); - /* Relink to new hash chain. */ - hlist_add_head(&q->q.list, - &nf_frags.hash[hval]); - } - } - } - write_unlock(&nf_frags.lock); - - mod_timer(&nf_frags.secret_timer, now + nf_frags_ctl.secret_interval); + nq = container_of(q, struct nf_ct_frag6_queue, q); + return ip6qhashfn(nq->id, &nq->saddr, &nq->daddr); } /* Memory Tracking Functions. */ @@ -817,11 +797,8 @@ int nf_ct_frag6_kfree_frags(struct sk_buff *skb) int nf_ct_frag6_init(void) { - setup_timer(&nf_frags.secret_timer, nf_ct_frag6_secret_rebuild, 0); - nf_frags.secret_timer.expires = jiffies + nf_frags_ctl.secret_interval; - add_timer(&nf_frags.secret_timer); - nf_frags.ctl = &nf_frags_ctl; + nf_frags.hashfn = nf_hashfn; inet_frags_init(&nf_frags); return 0; @@ -831,7 +808,6 @@ void nf_ct_frag6_cleanup(void) { inet_frags_fini(&nf_frags); - del_timer(&nf_frags.secret_timer); nf_frags_ctl.low_thresh = 0; nf_ct_frag6_evictor(); } diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index db129a7a61..c7d4961bbc 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -135,35 +135,12 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr, return c & (INETFRAGS_HASHSZ - 1); } -static void ip6_frag_secret_rebuild(unsigned long dummy) +static unsigned int ip6_hashfn(struct inet_frag_queue *q) { - unsigned long now = jiffies; - int i; - - write_lock(&ip6_frags.lock); - get_random_bytes(&ip6_frags.rnd, sizeof(u32)); - for (i = 0; i < INETFRAGS_HASHSZ; i++) { - struct frag_queue *q; - struct hlist_node *p, *n; - - hlist_for_each_entry_safe(q, p, n, &ip6_frags.hash[i], q.list) { - unsigned int hval = ip6qhashfn(q->id, - &q->saddr, - &q->daddr); - - if (hval != i) { - hlist_del(&q->q.list); - - /* Relink to new hash chain. */ - hlist_add_head(&q->q.list, - &ip6_frags.hash[hval]); - - } - } - } - write_unlock(&ip6_frags.lock); + struct frag_queue *fq; - mod_timer(&ip6_frags.secret_timer, now + ip6_frags_ctl.secret_interval); + fq = container_of(q, struct frag_queue, q); + return ip6qhashfn(fq->id, &fq->saddr, &fq->daddr); } /* Memory Tracking Functions. */ @@ -765,11 +742,7 @@ void __init ipv6_frag_init(void) if (inet6_add_protocol(&frag_protocol, IPPROTO_FRAGMENT) < 0) printk(KERN_ERR "ipv6_frag_init: Could not register protocol\n"); - init_timer(&ip6_frags.secret_timer); - ip6_frags.secret_timer.function = ip6_frag_secret_rebuild; - ip6_frags.secret_timer.expires = jiffies + ip6_frags_ctl.secret_interval; - add_timer(&ip6_frags.secret_timer); - ip6_frags.ctl = &ip6_frags_ctl; + ip6_frags.hashfn = ip6_hashfn; inet_frags_init(&ip6_frags); } -- 2.39.5