#define LAST_IN 1
};
+#define INETFRAGS_HASHSZ 64
+
+struct inet_frags {
+ struct list_head lru_list;
+ struct hlist_head hash[INETFRAGS_HASHSZ];
+ rwlock_t lock;
+ u32 rnd;
+ int nqueues;
+ atomic_t mem;
+ struct timer_list secret_timer;
+};
+
+void inet_frags_init(struct inet_frags *);
+void inet_frags_fini(struct inet_frags *);
+
#endif
};
int ip_defrag(struct sk_buff *skb, u32 user);
-extern int ip_frag_nqueues;
-extern atomic_t ip_frag_mem;
+int ip_frag_mem(void);
+int ip_frag_nqueues(void);
/*
* Functions provided by ip_forward.c
extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
-extern int ip6_frag_nqueues;
-extern atomic_t ip6_frag_mem;
+int ip6_frag_nqueues(void);
+int ip6_frag_mem(void);
#define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
tcp_minisocks.o tcp_cong.o \
datagram.o raw.o udp.o udplite.o \
arp.o icmp.o devinet.o af_inet.o igmp.o \
- sysctl_net_ipv4.o fib_frontend.o fib_semantics.o
+ sysctl_net_ipv4.o fib_frontend.o fib_semantics.o \
+ inet_fragment.o
obj-$(CONFIG_IP_FIB_HASH) += fib_hash.o
obj-$(CONFIG_IP_FIB_TRIE) += fib_trie.o
--- /dev/null
+/*
+ * inet fragments management
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Pavel Emelyanov <xemul@openvz.org>
+ * Started as consolidation of ipv4/ip_fragment.c,
+ * ipv6/reassembly. and ipv6 nf conntrack reassembly
+ */
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+
+#include <net/inet_frag.h>
+
+void inet_frags_init(struct inet_frags *f)
+{
+ int i;
+
+ for (i = 0; i < INETFRAGS_HASHSZ; i++)
+ INIT_HLIST_HEAD(&f->hash[i]);
+
+ INIT_LIST_HEAD(&f->lru_list);
+ rwlock_init(&f->lock);
+
+ f->rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
+ (jiffies ^ (jiffies >> 6)));
+
+ f->nqueues = 0;
+ atomic_set(&f->mem, 0);
+
+}
+EXPORT_SYMBOL(inet_frags_init);
+
+void inet_frags_fini(struct inet_frags *f)
+{
+}
+EXPORT_SYMBOL(inet_frags_fini);
struct inet_peer *peer;
};
-/* Hash table. */
+static struct inet_frags ip4_frags;
-#define IPQ_HASHSZ 64
+int ip_frag_nqueues(void)
+{
+ return ip4_frags.nqueues;
+}
-/* Per-bucket lock is easy to add now. */
-static struct hlist_head ipq_hash[IPQ_HASHSZ];
-static DEFINE_RWLOCK(ipfrag_lock);
-static u32 ipfrag_hash_rnd;
-static LIST_HEAD(ipq_lru_list);
-int ip_frag_nqueues = 0;
+int ip_frag_mem(void)
+{
+ return atomic_read(&ip4_frags.mem);
+}
static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
struct net_device *dev);
{
hlist_del(&qp->q.list);
list_del(&qp->q.lru_list);
- ip_frag_nqueues--;
+ ip4_frags.nqueues--;
}
static __inline__ void ipq_unlink(struct ipq *ipq)
{
- write_lock(&ipfrag_lock);
+ write_lock(&ip4_frags.lock);
__ipq_unlink(ipq);
- write_unlock(&ipfrag_lock);
+ write_unlock(&ip4_frags.lock);
}
static unsigned int ipqhashfn(__be16 id, __be32 saddr, __be32 daddr, u8 prot)
{
return jhash_3words((__force u32)id << 16 | prot,
(__force u32)saddr, (__force u32)daddr,
- ipfrag_hash_rnd) & (IPQ_HASHSZ - 1);
+ ip4_frags.rnd) & (INETFRAGS_HASHSZ - 1);
}
-static struct timer_list ipfrag_secret_timer;
int sysctl_ipfrag_secret_interval __read_mostly = 10 * 60 * HZ;
static void ipfrag_secret_rebuild(unsigned long dummy)
unsigned long now = jiffies;
int i;
- write_lock(&ipfrag_lock);
- get_random_bytes(&ipfrag_hash_rnd, sizeof(u32));
- for (i = 0; i < IPQ_HASHSZ; i++) {
+ 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, &ipq_hash[i], q.list) {
+ 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);
hlist_del(&q->q.list);
/* Relink to new hash chain. */
- hlist_add_head(&q->q.list, &ipq_hash[hval]);
+ hlist_add_head(&q->q.list, &ip4_frags.hash[hval]);
}
}
}
- write_unlock(&ipfrag_lock);
+ write_unlock(&ip4_frags.lock);
- mod_timer(&ipfrag_secret_timer, now + sysctl_ipfrag_secret_interval);
+ mod_timer(&ip4_frags.secret_timer, now + sysctl_ipfrag_secret_interval);
}
-atomic_t ip_frag_mem = ATOMIC_INIT(0); /* Memory used for fragments */
-
/* Memory Tracking Functions. */
static __inline__ void frag_kfree_skb(struct sk_buff *skb, int *work)
{
if (work)
*work -= skb->truesize;
- atomic_sub(skb->truesize, &ip_frag_mem);
+ atomic_sub(skb->truesize, &ip4_frags.mem);
kfree_skb(skb);
}
{
if (work)
*work -= sizeof(struct ipq);
- atomic_sub(sizeof(struct ipq), &ip_frag_mem);
+ atomic_sub(sizeof(struct ipq), &ip4_frags.mem);
kfree(qp);
}
if (!qp)
return NULL;
- atomic_add(sizeof(struct ipq), &ip_frag_mem);
+ atomic_add(sizeof(struct ipq), &ip4_frags.mem);
return qp;
}
struct list_head *tmp;
int work;
- work = atomic_read(&ip_frag_mem) - sysctl_ipfrag_low_thresh;
+ work = atomic_read(&ip4_frags.mem) - sysctl_ipfrag_low_thresh;
if (work <= 0)
return;
while (work > 0) {
- read_lock(&ipfrag_lock);
- if (list_empty(&ipq_lru_list)) {
- read_unlock(&ipfrag_lock);
+ read_lock(&ip4_frags.lock);
+ if (list_empty(&ip4_frags.lru_list)) {
+ read_unlock(&ip4_frags.lock);
return;
}
- tmp = ipq_lru_list.next;
+ tmp = ip4_frags.lru_list.next;
qp = list_entry(tmp, struct ipq, q.lru_list);
atomic_inc(&qp->q.refcnt);
- read_unlock(&ipfrag_lock);
+ read_unlock(&ip4_frags.lock);
spin_lock(&qp->q.lock);
if (!(qp->q.last_in&COMPLETE))
#endif
unsigned int hash;
- write_lock(&ipfrag_lock);
+ write_lock(&ip4_frags.lock);
hash = ipqhashfn(qp_in->id, qp_in->saddr, qp_in->daddr,
qp_in->protocol);
#ifdef CONFIG_SMP
* such entry could be created on other cpu, while we
* promoted read lock to write lock.
*/
- hlist_for_each_entry(qp, n, &ipq_hash[hash], q.list) {
+ hlist_for_each_entry(qp, n, &ip4_frags.hash[hash], q.list) {
if (qp->id == qp_in->id &&
qp->saddr == qp_in->saddr &&
qp->daddr == qp_in->daddr &&
qp->protocol == qp_in->protocol &&
qp->user == qp_in->user) {
atomic_inc(&qp->q.refcnt);
- write_unlock(&ipfrag_lock);
+ write_unlock(&ip4_frags.lock);
qp_in->q.last_in |= COMPLETE;
ipq_put(qp_in, NULL);
return qp;
atomic_inc(&qp->q.refcnt);
atomic_inc(&qp->q.refcnt);
- hlist_add_head(&qp->q.list, &ipq_hash[hash]);
+ hlist_add_head(&qp->q.list, &ip4_frags.hash[hash]);
INIT_LIST_HEAD(&qp->q.lru_list);
- list_add_tail(&qp->q.lru_list, &ipq_lru_list);
- ip_frag_nqueues++;
- write_unlock(&ipfrag_lock);
+ list_add_tail(&qp->q.lru_list, &ip4_frags.lru_list);
+ ip4_frags.nqueues++;
+ write_unlock(&ip4_frags.lock);
return qp;
}
struct ipq *qp;
struct hlist_node *n;
- read_lock(&ipfrag_lock);
+ read_lock(&ip4_frags.lock);
hash = ipqhashfn(id, saddr, daddr, protocol);
- hlist_for_each_entry(qp, n, &ipq_hash[hash], q.list) {
+ hlist_for_each_entry(qp, n, &ip4_frags.hash[hash], q.list) {
if (qp->id == id &&
qp->saddr == saddr &&
qp->daddr == daddr &&
qp->protocol == protocol &&
qp->user == user) {
atomic_inc(&qp->q.refcnt);
- read_unlock(&ipfrag_lock);
+ read_unlock(&ip4_frags.lock);
return qp;
}
}
- read_unlock(&ipfrag_lock);
+ read_unlock(&ip4_frags.lock);
return ip_frag_create(iph, user);
}
}
qp->q.stamp = skb->tstamp;
qp->q.meat += skb->len;
- atomic_add(skb->truesize, &ip_frag_mem);
+ atomic_add(skb->truesize, &ip4_frags.mem);
if (offset == 0)
qp->q.last_in |= FIRST_IN;
if (qp->q.last_in == (FIRST_IN | LAST_IN) && qp->q.meat == qp->q.len)
return ip_frag_reasm(qp, prev, dev);
- write_lock(&ipfrag_lock);
- list_move_tail(&qp->q.lru_list, &ipq_lru_list);
- write_unlock(&ipfrag_lock);
+ write_lock(&ip4_frags.lock);
+ list_move_tail(&qp->q.lru_list, &ip4_frags.lru_list);
+ write_unlock(&ip4_frags.lock);
return -EINPROGRESS;
err:
head->len -= clone->len;
clone->csum = 0;
clone->ip_summed = head->ip_summed;
- atomic_add(clone->truesize, &ip_frag_mem);
+ atomic_add(clone->truesize, &ip4_frags.mem);
}
skb_shinfo(head)->frag_list = head->next;
skb_push(head, head->data - skb_network_header(head));
- atomic_sub(head->truesize, &ip_frag_mem);
+ atomic_sub(head->truesize, &ip4_frags.mem);
for (fp=head->next; fp; fp = fp->next) {
head->data_len += fp->len;
else if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_add(head->csum, fp->csum);
head->truesize += fp->truesize;
- atomic_sub(fp->truesize, &ip_frag_mem);
+ atomic_sub(fp->truesize, &ip4_frags.mem);
}
head->next = NULL;
IP_INC_STATS_BH(IPSTATS_MIB_REASMREQDS);
/* Start by cleaning up the memory. */
- if (atomic_read(&ip_frag_mem) > sysctl_ipfrag_high_thresh)
+ if (atomic_read(&ip4_frags.mem) > sysctl_ipfrag_high_thresh)
ip_evictor();
/* Lookup (or create) queue header */
void __init ipfrag_init(void)
{
- ipfrag_hash_rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
- (jiffies ^ (jiffies >> 6)));
+ init_timer(&ip4_frags.secret_timer);
+ ip4_frags.secret_timer.function = ipfrag_secret_rebuild;
+ ip4_frags.secret_timer.expires = jiffies + sysctl_ipfrag_secret_interval;
+ add_timer(&ip4_frags.secret_timer);
- init_timer(&ipfrag_secret_timer);
- ipfrag_secret_timer.function = ipfrag_secret_rebuild;
- ipfrag_secret_timer.expires = jiffies + sysctl_ipfrag_secret_interval;
- add_timer(&ipfrag_secret_timer);
+ inet_frags_init(&ip4_frags);
}
EXPORT_SYMBOL(ip_defrag);
seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot));
seq_printf(seq, "UDPLITE: inuse %d\n", fold_prot_inuse(&udplite_prot));
seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
- seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
- atomic_read(&ip_frag_mem));
+ seq_printf(seq, "FRAG: inuse %d memory %d\n",
+ ip_frag_nqueues(), ip_frag_mem());
return 0;
}
__u16 nhoffset;
};
-/* Hash table. */
-
-#define FRAG6Q_HASHSZ 64
-
-static struct hlist_head nf_ct_frag6_hash[FRAG6Q_HASHSZ];
-static DEFINE_RWLOCK(nf_ct_frag6_lock);
-static u32 nf_ct_frag6_hash_rnd;
-static LIST_HEAD(nf_ct_frag6_lru_list);
-int nf_ct_frag6_nqueues = 0;
+static struct inet_frags nf_frags;
static __inline__ void __fq_unlink(struct nf_ct_frag6_queue *fq)
{
hlist_del(&fq->q.list);
list_del(&fq->q.lru_list);
- nf_ct_frag6_nqueues--;
+ nf_frags.nqueues--;
}
static __inline__ void fq_unlink(struct nf_ct_frag6_queue *fq)
{
- write_lock(&nf_ct_frag6_lock);
+ write_lock(&nf_frags.lock);
__fq_unlink(fq);
- write_unlock(&nf_ct_frag6_lock);
+ write_unlock(&nf_frags.lock);
}
static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
a += JHASH_GOLDEN_RATIO;
b += JHASH_GOLDEN_RATIO;
- c += nf_ct_frag6_hash_rnd;
+ c += nf_frags.rnd;
__jhash_mix(a, b, c);
a += (__force u32)saddr->s6_addr32[3];
c += (__force u32)id;
__jhash_mix(a, b, c);
- return c & (FRAG6Q_HASHSZ - 1);
+ return c & (INETFRAGS_HASHSZ - 1);
}
-static struct timer_list nf_ct_frag6_secret_timer;
int nf_ct_frag6_secret_interval = 10 * 60 * HZ;
static void nf_ct_frag6_secret_rebuild(unsigned long dummy)
unsigned long now = jiffies;
int i;
- write_lock(&nf_ct_frag6_lock);
- get_random_bytes(&nf_ct_frag6_hash_rnd, sizeof(u32));
- for (i = 0; i < FRAG6Q_HASHSZ; i++) {
+ 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_ct_frag6_hash[i], q.list) {
+ hlist_for_each_entry_safe(q, p, n, &nf_frags.hash[i], q.list) {
unsigned int hval = ip6qhashfn(q->id,
&q->saddr,
&q->daddr);
hlist_del(&q->q.list);
/* Relink to new hash chain. */
hlist_add_head(&q->q.list,
- &nf_ct_frag6_hash[hval]);
+ &nf_frags.hash[hval]);
}
}
}
- write_unlock(&nf_ct_frag6_lock);
+ write_unlock(&nf_frags.lock);
- mod_timer(&nf_ct_frag6_secret_timer, now + nf_ct_frag6_secret_interval);
+ mod_timer(&nf_frags.secret_timer, now + nf_ct_frag6_secret_interval);
}
-atomic_t nf_ct_frag6_mem = ATOMIC_INIT(0);
-
/* Memory Tracking Functions. */
static inline void frag_kfree_skb(struct sk_buff *skb, unsigned int *work)
{
if (work)
*work -= skb->truesize;
- atomic_sub(skb->truesize, &nf_ct_frag6_mem);
+ atomic_sub(skb->truesize, &nf_frags.mem);
if (NFCT_FRAG6_CB(skb)->orig)
kfree_skb(NFCT_FRAG6_CB(skb)->orig);
{
if (work)
*work -= sizeof(struct nf_ct_frag6_queue);
- atomic_sub(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
+ atomic_sub(sizeof(struct nf_ct_frag6_queue), &nf_frags.mem);
kfree(fq);
}
if (!fq)
return NULL;
- atomic_add(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
+ atomic_add(sizeof(struct nf_ct_frag6_queue), &nf_frags.mem);
return fq;
}
struct list_head *tmp;
unsigned int work;
- work = atomic_read(&nf_ct_frag6_mem);
+ work = atomic_read(&nf_frags.mem);
if (work <= nf_ct_frag6_low_thresh)
return;
work -= nf_ct_frag6_low_thresh;
while (work > 0) {
- read_lock(&nf_ct_frag6_lock);
- if (list_empty(&nf_ct_frag6_lru_list)) {
- read_unlock(&nf_ct_frag6_lock);
+ read_lock(&nf_frags.lock);
+ if (list_empty(&nf_frags.lru_list)) {
+ read_unlock(&nf_frags.lock);
return;
}
- tmp = nf_ct_frag6_lru_list.next;
+ tmp = nf_frags.lru_list.next;
BUG_ON(tmp == NULL);
fq = list_entry(tmp, struct nf_ct_frag6_queue, q.lru_list);
atomic_inc(&fq->q.refcnt);
- read_unlock(&nf_ct_frag6_lock);
+ read_unlock(&nf_frags.lock);
spin_lock(&fq->q.lock);
if (!(fq->q.last_in&COMPLETE))
struct hlist_node *n;
#endif
- write_lock(&nf_ct_frag6_lock);
+ write_lock(&nf_frags.lock);
#ifdef CONFIG_SMP
- hlist_for_each_entry(fq, n, &nf_ct_frag6_hash[hash], q.list) {
+ hlist_for_each_entry(fq, n, &nf_frags.hash[hash], q.list) {
if (fq->id == fq_in->id &&
ipv6_addr_equal(&fq_in->saddr, &fq->saddr) &&
ipv6_addr_equal(&fq_in->daddr, &fq->daddr)) {
atomic_inc(&fq->q.refcnt);
- write_unlock(&nf_ct_frag6_lock);
+ write_unlock(&nf_frags.lock);
fq_in->q.last_in |= COMPLETE;
fq_put(fq_in, NULL);
return fq;
atomic_inc(&fq->q.refcnt);
atomic_inc(&fq->q.refcnt);
- hlist_add_head(&fq->q.list, &nf_ct_frag6_hash[hash]);
+ hlist_add_head(&fq->q.list, &nf_frags.hash[hash]);
INIT_LIST_HEAD(&fq->q.lru_list);
- list_add_tail(&fq->q.lru_list, &nf_ct_frag6_lru_list);
- nf_ct_frag6_nqueues++;
- write_unlock(&nf_ct_frag6_lock);
+ list_add_tail(&fq->q.lru_list, &nf_frags.lru_list);
+ nf_frags.nqueues++;
+ write_unlock(&nf_frags.lock);
return fq;
}
struct hlist_node *n;
unsigned int hash = ip6qhashfn(id, src, dst);
- read_lock(&nf_ct_frag6_lock);
- hlist_for_each_entry(fq, n, &nf_ct_frag6_hash[hash], q.list) {
+ read_lock(&nf_frags.lock);
+ hlist_for_each_entry(fq, n, &nf_frags.hash[hash], q.list) {
if (fq->id == id &&
ipv6_addr_equal(src, &fq->saddr) &&
ipv6_addr_equal(dst, &fq->daddr)) {
atomic_inc(&fq->q.refcnt);
- read_unlock(&nf_ct_frag6_lock);
+ read_unlock(&nf_frags.lock);
return fq;
}
}
- read_unlock(&nf_ct_frag6_lock);
+ read_unlock(&nf_frags.lock);
return nf_ct_frag6_create(hash, id, src, dst);
}
skb->dev = NULL;
fq->q.stamp = skb->tstamp;
fq->q.meat += skb->len;
- atomic_add(skb->truesize, &nf_ct_frag6_mem);
+ atomic_add(skb->truesize, &nf_frags.mem);
/* The first fragment.
* nhoffset is obtained from the first fragment, of course.
fq->nhoffset = nhoff;
fq->q.last_in |= FIRST_IN;
}
- write_lock(&nf_ct_frag6_lock);
- list_move_tail(&fq->q.lru_list, &nf_ct_frag6_lru_list);
- write_unlock(&nf_ct_frag6_lock);
+ write_lock(&nf_frags.lock);
+ list_move_tail(&fq->q.lru_list, &nf_frags.lru_list);
+ write_unlock(&nf_frags.lock);
return 0;
err:
clone->ip_summed = head->ip_summed;
NFCT_FRAG6_CB(clone)->orig = NULL;
- atomic_add(clone->truesize, &nf_ct_frag6_mem);
+ atomic_add(clone->truesize, &nf_frags.mem);
}
/* We have to remove fragment header from datagram and to relocate
skb_shinfo(head)->frag_list = head->next;
skb_reset_transport_header(head);
skb_push(head, head->data - skb_network_header(head));
- atomic_sub(head->truesize, &nf_ct_frag6_mem);
+ atomic_sub(head->truesize, &nf_frags.mem);
for (fp=head->next; fp; fp = fp->next) {
head->data_len += fp->len;
else if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_add(head->csum, fp->csum);
head->truesize += fp->truesize;
- atomic_sub(fp->truesize, &nf_ct_frag6_mem);
+ atomic_sub(fp->truesize, &nf_frags.mem);
}
head->next = NULL;
goto ret_orig;
}
- if (atomic_read(&nf_ct_frag6_mem) > nf_ct_frag6_high_thresh)
+ if (atomic_read(&nf_frags.mem) > nf_ct_frag6_high_thresh)
nf_ct_frag6_evictor();
fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr);
int nf_ct_frag6_init(void)
{
- nf_ct_frag6_hash_rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
- (jiffies ^ (jiffies >> 6)));
-
- setup_timer(&nf_ct_frag6_secret_timer, nf_ct_frag6_secret_rebuild, 0);
- nf_ct_frag6_secret_timer.expires = jiffies
+ setup_timer(&nf_frags.secret_timer, nf_ct_frag6_secret_rebuild, 0);
+ nf_frags.secret_timer.expires = jiffies
+ nf_ct_frag6_secret_interval;
- add_timer(&nf_ct_frag6_secret_timer);
+ add_timer(&nf_frags.secret_timer);
+
+ inet_frags_init(&nf_frags);
return 0;
}
void nf_ct_frag6_cleanup(void)
{
- del_timer(&nf_ct_frag6_secret_timer);
+ inet_frags_fini(&nf_frags);
+
+ del_timer(&nf_frags.secret_timer);
nf_ct_frag6_low_thresh = 0;
nf_ct_frag6_evictor();
}
seq_printf(seq, "RAW6: inuse %d\n",
fold_prot_inuse(&rawv6_prot));
seq_printf(seq, "FRAG6: inuse %d memory %d\n",
- ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
+ ip6_frag_nqueues(), ip6_frag_mem());
return 0;
}
__u16 nhoffset;
};
-/* Hash table. */
+static struct inet_frags ip6_frags;
-#define IP6Q_HASHSZ 64
+int ip6_frag_nqueues(void)
+{
+ return ip6_frags.nqueues;
+}
-static struct hlist_head ip6_frag_hash[IP6Q_HASHSZ];
-static DEFINE_RWLOCK(ip6_frag_lock);
-static u32 ip6_frag_hash_rnd;
-static LIST_HEAD(ip6_frag_lru_list);
-int ip6_frag_nqueues = 0;
+int ip6_frag_mem(void)
+{
+ return atomic_read(&ip6_frags.mem);
+}
static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
struct net_device *dev);
{
hlist_del(&fq->q.list);
list_del(&fq->q.lru_list);
- ip6_frag_nqueues--;
+ ip6_frags.nqueues--;
}
static __inline__ void fq_unlink(struct frag_queue *fq)
{
- write_lock(&ip6_frag_lock);
+ write_lock(&ip6_frags.lock);
__fq_unlink(fq);
- write_unlock(&ip6_frag_lock);
+ write_unlock(&ip6_frags.lock);
}
/*
a += JHASH_GOLDEN_RATIO;
b += JHASH_GOLDEN_RATIO;
- c += ip6_frag_hash_rnd;
+ c += ip6_frags.rnd;
__jhash_mix(a, b, c);
a += (__force u32)saddr->s6_addr32[3];
c += (__force u32)id;
__jhash_mix(a, b, c);
- return c & (IP6Q_HASHSZ - 1);
+ return c & (INETFRAGS_HASHSZ - 1);
}
-static struct timer_list ip6_frag_secret_timer;
int sysctl_ip6frag_secret_interval __read_mostly = 10 * 60 * HZ;
static void ip6_frag_secret_rebuild(unsigned long dummy)
unsigned long now = jiffies;
int i;
- write_lock(&ip6_frag_lock);
- get_random_bytes(&ip6_frag_hash_rnd, sizeof(u32));
- for (i = 0; i < IP6Q_HASHSZ; 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_frag_hash[i], q.list) {
+ hlist_for_each_entry_safe(q, p, n, &ip6_frags.hash[i], q.list) {
unsigned int hval = ip6qhashfn(q->id,
&q->saddr,
&q->daddr);
/* Relink to new hash chain. */
hlist_add_head(&q->q.list,
- &ip6_frag_hash[hval]);
+ &ip6_frags.hash[hval]);
}
}
}
- write_unlock(&ip6_frag_lock);
+ write_unlock(&ip6_frags.lock);
- mod_timer(&ip6_frag_secret_timer, now + sysctl_ip6frag_secret_interval);
+ mod_timer(&ip6_frags.secret_timer, now + sysctl_ip6frag_secret_interval);
}
-atomic_t ip6_frag_mem = ATOMIC_INIT(0);
-
/* Memory Tracking Functions. */
static inline void frag_kfree_skb(struct sk_buff *skb, int *work)
{
if (work)
*work -= skb->truesize;
- atomic_sub(skb->truesize, &ip6_frag_mem);
+ atomic_sub(skb->truesize, &ip6_frags.mem);
kfree_skb(skb);
}
{
if (work)
*work -= sizeof(struct frag_queue);
- atomic_sub(sizeof(struct frag_queue), &ip6_frag_mem);
+ atomic_sub(sizeof(struct frag_queue), &ip6_frags.mem);
kfree(fq);
}
if(!fq)
return NULL;
- atomic_add(sizeof(struct frag_queue), &ip6_frag_mem);
+ atomic_add(sizeof(struct frag_queue), &ip6_frags.mem);
return fq;
}
struct list_head *tmp;
int work;
- work = atomic_read(&ip6_frag_mem) - sysctl_ip6frag_low_thresh;
+ work = atomic_read(&ip6_frags.mem) - sysctl_ip6frag_low_thresh;
if (work <= 0)
return;
while(work > 0) {
- read_lock(&ip6_frag_lock);
- if (list_empty(&ip6_frag_lru_list)) {
- read_unlock(&ip6_frag_lock);
+ read_lock(&ip6_frags.lock);
+ if (list_empty(&ip6_frags.lru_list)) {
+ read_unlock(&ip6_frags.lock);
return;
}
- tmp = ip6_frag_lru_list.next;
+ tmp = ip6_frags.lru_list.next;
fq = list_entry(tmp, struct frag_queue, q.lru_list);
atomic_inc(&fq->q.refcnt);
- read_unlock(&ip6_frag_lock);
+ read_unlock(&ip6_frags.lock);
spin_lock(&fq->q.lock);
if (!(fq->q.last_in&COMPLETE))
struct hlist_node *n;
#endif
- write_lock(&ip6_frag_lock);
+ write_lock(&ip6_frags.lock);
hash = ip6qhashfn(fq_in->id, &fq_in->saddr, &fq_in->daddr);
#ifdef CONFIG_SMP
- hlist_for_each_entry(fq, n, &ip6_frag_hash[hash], q.list) {
+ hlist_for_each_entry(fq, n, &ip6_frags.hash[hash], q.list) {
if (fq->id == fq_in->id &&
ipv6_addr_equal(&fq_in->saddr, &fq->saddr) &&
ipv6_addr_equal(&fq_in->daddr, &fq->daddr)) {
atomic_inc(&fq->q.refcnt);
- write_unlock(&ip6_frag_lock);
+ write_unlock(&ip6_frags.lock);
fq_in->q.last_in |= COMPLETE;
fq_put(fq_in, NULL);
return fq;
atomic_inc(&fq->q.refcnt);
atomic_inc(&fq->q.refcnt);
- hlist_add_head(&fq->q.list, &ip6_frag_hash[hash]);
+ hlist_add_head(&fq->q.list, &ip6_frags.hash[hash]);
INIT_LIST_HEAD(&fq->q.lru_list);
- list_add_tail(&fq->q.lru_list, &ip6_frag_lru_list);
- ip6_frag_nqueues++;
- write_unlock(&ip6_frag_lock);
+ list_add_tail(&fq->q.lru_list, &ip6_frags.lru_list);
+ ip6_frags.nqueues++;
+ write_unlock(&ip6_frags.lock);
return fq;
}
struct hlist_node *n;
unsigned int hash;
- read_lock(&ip6_frag_lock);
+ read_lock(&ip6_frags.lock);
hash = ip6qhashfn(id, src, dst);
- hlist_for_each_entry(fq, n, &ip6_frag_hash[hash], q.list) {
+ hlist_for_each_entry(fq, n, &ip6_frags.hash[hash], q.list) {
if (fq->id == id &&
ipv6_addr_equal(src, &fq->saddr) &&
ipv6_addr_equal(dst, &fq->daddr)) {
atomic_inc(&fq->q.refcnt);
- read_unlock(&ip6_frag_lock);
+ read_unlock(&ip6_frags.lock);
return fq;
}
}
- read_unlock(&ip6_frag_lock);
+ read_unlock(&ip6_frags.lock);
return ip6_frag_create(id, src, dst, idev);
}
}
fq->q.stamp = skb->tstamp;
fq->q.meat += skb->len;
- atomic_add(skb->truesize, &ip6_frag_mem);
+ atomic_add(skb->truesize, &ip6_frags.mem);
/* The first fragment.
* nhoffset is obtained from the first fragment, of course.
if (fq->q.last_in == (FIRST_IN | LAST_IN) && fq->q.meat == fq->q.len)
return ip6_frag_reasm(fq, prev, dev);
- write_lock(&ip6_frag_lock);
- list_move_tail(&fq->q.lru_list, &ip6_frag_lru_list);
- write_unlock(&ip6_frag_lock);
+ write_lock(&ip6_frags.lock);
+ list_move_tail(&fq->q.lru_list, &ip6_frags.lru_list);
+ write_unlock(&ip6_frags.lock);
return -1;
err:
head->len -= clone->len;
clone->csum = 0;
clone->ip_summed = head->ip_summed;
- atomic_add(clone->truesize, &ip6_frag_mem);
+ atomic_add(clone->truesize, &ip6_frags.mem);
}
/* We have to remove fragment header from datagram and to relocate
skb_shinfo(head)->frag_list = head->next;
skb_reset_transport_header(head);
skb_push(head, head->data - skb_network_header(head));
- atomic_sub(head->truesize, &ip6_frag_mem);
+ atomic_sub(head->truesize, &ip6_frags.mem);
for (fp=head->next; fp; fp = fp->next) {
head->data_len += fp->len;
else if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_add(head->csum, fp->csum);
head->truesize += fp->truesize;
- atomic_sub(fp->truesize, &ip6_frag_mem);
+ atomic_sub(fp->truesize, &ip6_frags.mem);
}
head->next = NULL;
return 1;
}
- if (atomic_read(&ip6_frag_mem) > sysctl_ip6frag_high_thresh)
+ if (atomic_read(&ip6_frags.mem) > sysctl_ip6frag_high_thresh)
ip6_evictor(ip6_dst_idev(skb->dst));
if ((fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr,
if (inet6_add_protocol(&frag_protocol, IPPROTO_FRAGMENT) < 0)
printk(KERN_ERR "ipv6_frag_init: Could not register protocol\n");
- ip6_frag_hash_rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
- (jiffies ^ (jiffies >> 6)));
+ init_timer(&ip6_frags.secret_timer);
+ ip6_frags.secret_timer.function = ip6_frag_secret_rebuild;
+ ip6_frags.secret_timer.expires = jiffies + sysctl_ip6frag_secret_interval;
+ add_timer(&ip6_frags.secret_timer);
- init_timer(&ip6_frag_secret_timer);
- ip6_frag_secret_timer.function = ip6_frag_secret_rebuild;
- ip6_frag_secret_timer.expires = jiffies + sysctl_ip6frag_secret_interval;
- add_timer(&ip6_frag_secret_timer);
+ inet_frags_init(&ip6_frags);
}
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff