--- /dev/null
+#ifndef __NET_FRAG_H__
+#define __NET_FRAG_H__
+
+struct inet_frag_queue {
+ struct hlist_node list;
+ struct list_head lru_list; /* lru list member */
+ spinlock_t lock;
+ atomic_t refcnt;
+ struct timer_list timer; /* when will this queue expire? */
+ struct sk_buff *fragments; /* list of received fragments */
+ ktime_t stamp;
+ int len; /* total length of orig datagram */
+ int meat;
+ __u8 last_in; /* first/last segment arrived? */
+
+#define COMPLETE 4
+#define FIRST_IN 2
+#define LAST_IN 1
+};
+
+#endif
#include <net/icmp.h>
#include <net/checksum.h>
#include <net/inetpeer.h>
+#include <net/inet_frag.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/inet.h>
/* Describe an entry in the "incomplete datagrams" queue. */
struct ipq {
- struct hlist_node list;
- struct list_head lru_list; /* lru list member */
+ struct inet_frag_queue q;
+
u32 user;
__be32 saddr;
__be32 daddr;
__be16 id;
u8 protocol;
- u8 last_in;
-#define COMPLETE 4
-#define FIRST_IN 2
-#define LAST_IN 1
-
- struct sk_buff *fragments; /* linked list of received fragments */
- int len; /* total length of original datagram */
- int meat;
- spinlock_t lock;
- atomic_t refcnt;
- struct timer_list timer; /* when will this queue expire? */
- ktime_t stamp;
int iif;
unsigned int rid;
struct inet_peer *peer;
static __inline__ void __ipq_unlink(struct ipq *qp)
{
- hlist_del(&qp->list);
- list_del(&qp->lru_list);
+ hlist_del(&qp->q.list);
+ list_del(&qp->q.lru_list);
ip_frag_nqueues--;
}
struct ipq *q;
struct hlist_node *p, *n;
- hlist_for_each_entry_safe(q, p, n, &ipq_hash[i], list) {
+ hlist_for_each_entry_safe(q, p, n, &ipq_hash[i], q.list) {
unsigned int hval = ipqhashfn(q->id, q->saddr,
q->daddr, q->protocol);
if (hval != i) {
- hlist_del(&q->list);
+ hlist_del(&q->q.list);
/* Relink to new hash chain. */
- hlist_add_head(&q->list, &ipq_hash[hval]);
+ hlist_add_head(&q->q.list, &ipq_hash[hval]);
}
}
}
{
struct sk_buff *fp;
- BUG_TRAP(qp->last_in&COMPLETE);
- BUG_TRAP(del_timer(&qp->timer) == 0);
+ BUG_TRAP(qp->q.last_in&COMPLETE);
+ BUG_TRAP(del_timer(&qp->q.timer) == 0);
if (qp->peer)
inet_putpeer(qp->peer);
/* Release all fragment data. */
- fp = qp->fragments;
+ fp = qp->q.fragments;
while (fp) {
struct sk_buff *xp = fp->next;
static __inline__ void ipq_put(struct ipq *ipq, int *work)
{
- if (atomic_dec_and_test(&ipq->refcnt))
+ if (atomic_dec_and_test(&ipq->q.refcnt))
ip_frag_destroy(ipq, work);
}
*/
static void ipq_kill(struct ipq *ipq)
{
- if (del_timer(&ipq->timer))
- atomic_dec(&ipq->refcnt);
+ if (del_timer(&ipq->q.timer))
+ atomic_dec(&ipq->q.refcnt);
- if (!(ipq->last_in & COMPLETE)) {
+ if (!(ipq->q.last_in & COMPLETE)) {
ipq_unlink(ipq);
- atomic_dec(&ipq->refcnt);
- ipq->last_in |= COMPLETE;
+ atomic_dec(&ipq->q.refcnt);
+ ipq->q.last_in |= COMPLETE;
}
}
return;
}
tmp = ipq_lru_list.next;
- qp = list_entry(tmp, struct ipq, lru_list);
- atomic_inc(&qp->refcnt);
+ qp = list_entry(tmp, struct ipq, q.lru_list);
+ atomic_inc(&qp->q.refcnt);
read_unlock(&ipfrag_lock);
- spin_lock(&qp->lock);
- if (!(qp->last_in&COMPLETE))
+ spin_lock(&qp->q.lock);
+ if (!(qp->q.last_in&COMPLETE))
ipq_kill(qp);
- spin_unlock(&qp->lock);
+ spin_unlock(&qp->q.lock);
ipq_put(qp, &work);
IP_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
{
struct ipq *qp = (struct ipq *) arg;
- spin_lock(&qp->lock);
+ spin_lock(&qp->q.lock);
- if (qp->last_in & COMPLETE)
+ if (qp->q.last_in & COMPLETE)
goto out;
ipq_kill(qp);
IP_INC_STATS_BH(IPSTATS_MIB_REASMTIMEOUT);
IP_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
- if ((qp->last_in&FIRST_IN) && qp->fragments != NULL) {
- struct sk_buff *head = qp->fragments;
+ if ((qp->q.last_in&FIRST_IN) && qp->q.fragments != NULL) {
+ struct sk_buff *head = qp->q.fragments;
/* Send an ICMP "Fragment Reassembly Timeout" message. */
if ((head->dev = dev_get_by_index(&init_net, qp->iif)) != NULL) {
icmp_send(head, ICMP_TIME_EXCEEDED, ICMP_EXC_FRAGTIME, 0);
}
}
out:
- spin_unlock(&qp->lock);
+ spin_unlock(&qp->q.lock);
ipq_put(qp, NULL);
}
* 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], list) {
+ hlist_for_each_entry(qp, n, &ipq_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->refcnt);
+ atomic_inc(&qp->q.refcnt);
write_unlock(&ipfrag_lock);
- qp_in->last_in |= COMPLETE;
+ qp_in->q.last_in |= COMPLETE;
ipq_put(qp_in, NULL);
return qp;
}
#endif
qp = qp_in;
- if (!mod_timer(&qp->timer, jiffies + sysctl_ipfrag_time))
- atomic_inc(&qp->refcnt);
+ if (!mod_timer(&qp->q.timer, jiffies + sysctl_ipfrag_time))
+ atomic_inc(&qp->q.refcnt);
- atomic_inc(&qp->refcnt);
- hlist_add_head(&qp->list, &ipq_hash[hash]);
- INIT_LIST_HEAD(&qp->lru_list);
- list_add_tail(&qp->lru_list, &ipq_lru_list);
+ atomic_inc(&qp->q.refcnt);
+ hlist_add_head(&qp->q.list, &ipq_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);
return qp;
goto out_nomem;
qp->protocol = iph->protocol;
- qp->last_in = 0;
+ qp->q.last_in = 0;
qp->id = iph->id;
qp->saddr = iph->saddr;
qp->daddr = iph->daddr;
qp->user = user;
- qp->len = 0;
- qp->meat = 0;
- qp->fragments = NULL;
+ qp->q.len = 0;
+ qp->q.meat = 0;
+ qp->q.fragments = NULL;
qp->iif = 0;
qp->peer = sysctl_ipfrag_max_dist ? inet_getpeer(iph->saddr, 1) : NULL;
/* Initialize a timer for this entry. */
- init_timer(&qp->timer);
- qp->timer.data = (unsigned long) qp; /* pointer to queue */
- qp->timer.function = ip_expire; /* expire function */
- spin_lock_init(&qp->lock);
- atomic_set(&qp->refcnt, 1);
+ init_timer(&qp->q.timer);
+ qp->q.timer.data = (unsigned long) qp; /* pointer to queue */
+ qp->q.timer.function = ip_expire; /* expire function */
+ spin_lock_init(&qp->q.lock);
+ atomic_set(&qp->q.refcnt, 1);
return ip_frag_intern(qp);
read_lock(&ipfrag_lock);
hash = ipqhashfn(id, saddr, daddr, protocol);
- hlist_for_each_entry(qp, n, &ipq_hash[hash], list) {
+ hlist_for_each_entry(qp, n, &ipq_hash[hash], q.list) {
if (qp->id == id &&
qp->saddr == saddr &&
qp->daddr == daddr &&
qp->protocol == protocol &&
qp->user == user) {
- atomic_inc(&qp->refcnt);
+ atomic_inc(&qp->q.refcnt);
read_unlock(&ipfrag_lock);
return qp;
}
end = atomic_inc_return(&peer->rid);
qp->rid = end;
- rc = qp->fragments && (end - start) > max;
+ rc = qp->q.fragments && (end - start) > max;
if (rc) {
IP_INC_STATS_BH(IPSTATS_MIB_REASMFAILS);
{
struct sk_buff *fp;
- if (!mod_timer(&qp->timer, jiffies + sysctl_ipfrag_time)) {
- atomic_inc(&qp->refcnt);
+ if (!mod_timer(&qp->q.timer, jiffies + sysctl_ipfrag_time)) {
+ atomic_inc(&qp->q.refcnt);
return -ETIMEDOUT;
}
- fp = qp->fragments;
+ fp = qp->q.fragments;
do {
struct sk_buff *xp = fp->next;
frag_kfree_skb(fp, NULL);
fp = xp;
} while (fp);
- qp->last_in = 0;
- qp->len = 0;
- qp->meat = 0;
- qp->fragments = NULL;
+ qp->q.last_in = 0;
+ qp->q.len = 0;
+ qp->q.meat = 0;
+ qp->q.fragments = NULL;
qp->iif = 0;
return 0;
int ihl, end;
int err = -ENOENT;
- if (qp->last_in & COMPLETE)
+ if (qp->q.last_in & COMPLETE)
goto err;
if (!(IPCB(skb)->flags & IPSKB_FRAG_COMPLETE) &&
/* If we already have some bits beyond end
* or have different end, the segment is corrrupted.
*/
- if (end < qp->len ||
- ((qp->last_in & LAST_IN) && end != qp->len))
+ if (end < qp->q.len ||
+ ((qp->q.last_in & LAST_IN) && end != qp->q.len))
goto err;
- qp->last_in |= LAST_IN;
- qp->len = end;
+ qp->q.last_in |= LAST_IN;
+ qp->q.len = end;
} else {
if (end&7) {
end &= ~7;
if (skb->ip_summed != CHECKSUM_UNNECESSARY)
skb->ip_summed = CHECKSUM_NONE;
}
- if (end > qp->len) {
+ if (end > qp->q.len) {
/* Some bits beyond end -> corruption. */
- if (qp->last_in & LAST_IN)
+ if (qp->q.last_in & LAST_IN)
goto err;
- qp->len = end;
+ qp->q.len = end;
}
}
if (end == offset)
* this fragment, right?
*/
prev = NULL;
- for (next = qp->fragments; next != NULL; next = next->next) {
+ for (next = qp->q.fragments; next != NULL; next = next->next) {
if (FRAG_CB(next)->offset >= offset)
break; /* bingo! */
prev = next;
if (!pskb_pull(next, i))
goto err;
FRAG_CB(next)->offset += i;
- qp->meat -= i;
+ qp->q.meat -= i;
if (next->ip_summed != CHECKSUM_UNNECESSARY)
next->ip_summed = CHECKSUM_NONE;
break;
if (prev)
prev->next = next;
else
- qp->fragments = next;
+ qp->q.fragments = next;
- qp->meat -= free_it->len;
+ qp->q.meat -= free_it->len;
frag_kfree_skb(free_it, NULL);
}
}
if (prev)
prev->next = skb;
else
- qp->fragments = skb;
+ qp->q.fragments = skb;
dev = skb->dev;
if (dev) {
qp->iif = dev->ifindex;
skb->dev = NULL;
}
- qp->stamp = skb->tstamp;
- qp->meat += skb->len;
+ qp->q.stamp = skb->tstamp;
+ qp->q.meat += skb->len;
atomic_add(skb->truesize, &ip_frag_mem);
if (offset == 0)
- qp->last_in |= FIRST_IN;
+ qp->q.last_in |= FIRST_IN;
- if (qp->last_in == (FIRST_IN | LAST_IN) && qp->meat == qp->len)
+ 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->lru_list, &ipq_lru_list);
+ list_move_tail(&qp->q.lru_list, &ipq_lru_list);
write_unlock(&ipfrag_lock);
return -EINPROGRESS;
struct net_device *dev)
{
struct iphdr *iph;
- struct sk_buff *fp, *head = qp->fragments;
+ struct sk_buff *fp, *head = qp->q.fragments;
int len;
int ihlen;
int err;
fp->next = head->next;
prev->next = fp;
- skb_morph(head, qp->fragments);
- head->next = qp->fragments->next;
+ skb_morph(head, qp->q.fragments);
+ head->next = qp->q.fragments->next;
- kfree_skb(qp->fragments);
- qp->fragments = head;
+ kfree_skb(qp->q.fragments);
+ qp->q.fragments = head;
}
BUG_TRAP(head != NULL);
/* Allocate a new buffer for the datagram. */
ihlen = ip_hdrlen(head);
- len = ihlen + qp->len;
+ len = ihlen + qp->q.len;
err = -E2BIG;
if (len > 65535)
head->next = NULL;
head->dev = dev;
- head->tstamp = qp->stamp;
+ head->tstamp = qp->q.stamp;
iph = ip_hdr(head);
iph->frag_off = 0;
iph->tot_len = htons(len);
IP_INC_STATS_BH(IPSTATS_MIB_REASMOKS);
- qp->fragments = NULL;
+ qp->q.fragments = NULL;
return 0;
out_nomem:
if ((qp = ip_find(ip_hdr(skb), user)) != NULL) {
int ret;
- spin_lock(&qp->lock);
+ spin_lock(&qp->q.lock);
ret = ip_frag_queue(qp, skb);
- spin_unlock(&qp->lock);
+ spin_unlock(&qp->q.lock);
ipq_put(qp, NULL);
return ret;
}
#include <net/sock.h>
#include <net/snmp.h>
+#include <net/inet_frag.h>
#include <net/ipv6.h>
#include <net/protocol.h>
struct nf_ct_frag6_queue
{
- struct hlist_node list;
- struct list_head lru_list; /* lru list member */
+ struct inet_frag_queue q;
__be32 id; /* fragment id */
struct in6_addr saddr;
struct in6_addr daddr;
- spinlock_t lock;
- atomic_t refcnt;
- struct timer_list timer; /* expire timer */
- struct sk_buff *fragments;
- int len;
- int meat;
- ktime_t stamp;
unsigned int csum;
- __u8 last_in; /* has first/last segment arrived? */
-#define COMPLETE 4
-#define FIRST_IN 2
-#define LAST_IN 1
__u16 nhoffset;
};
static __inline__ void __fq_unlink(struct nf_ct_frag6_queue *fq)
{
- hlist_del(&fq->list);
- list_del(&fq->lru_list);
+ hlist_del(&fq->q.list);
+ list_del(&fq->q.lru_list);
nf_ct_frag6_nqueues--;
}
struct nf_ct_frag6_queue *q;
struct hlist_node *p, *n;
- hlist_for_each_entry_safe(q, p, n, &nf_ct_frag6_hash[i], list) {
+ hlist_for_each_entry_safe(q, p, n, &nf_ct_frag6_hash[i], q.list) {
unsigned int hval = ip6qhashfn(q->id,
&q->saddr,
&q->daddr);
if (hval != i) {
- hlist_del(&q->list);
+ hlist_del(&q->q.list);
/* Relink to new hash chain. */
- hlist_add_head(&q->list,
+ hlist_add_head(&q->q.list,
&nf_ct_frag6_hash[hval]);
}
}
{
struct sk_buff *fp;
- BUG_TRAP(fq->last_in&COMPLETE);
- BUG_TRAP(del_timer(&fq->timer) == 0);
+ BUG_TRAP(fq->q.last_in&COMPLETE);
+ BUG_TRAP(del_timer(&fq->q.timer) == 0);
/* Release all fragment data. */
- fp = fq->fragments;
+ fp = fq->q.fragments;
while (fp) {
struct sk_buff *xp = fp->next;
static __inline__ void fq_put(struct nf_ct_frag6_queue *fq, unsigned int *work)
{
- if (atomic_dec_and_test(&fq->refcnt))
+ if (atomic_dec_and_test(&fq->q.refcnt))
nf_ct_frag6_destroy(fq, work);
}
*/
static __inline__ void fq_kill(struct nf_ct_frag6_queue *fq)
{
- if (del_timer(&fq->timer))
- atomic_dec(&fq->refcnt);
+ if (del_timer(&fq->q.timer))
+ atomic_dec(&fq->q.refcnt);
- if (!(fq->last_in & COMPLETE)) {
+ if (!(fq->q.last_in & COMPLETE)) {
fq_unlink(fq);
- atomic_dec(&fq->refcnt);
- fq->last_in |= COMPLETE;
+ atomic_dec(&fq->q.refcnt);
+ fq->q.last_in |= COMPLETE;
}
}
}
tmp = nf_ct_frag6_lru_list.next;
BUG_ON(tmp == NULL);
- fq = list_entry(tmp, struct nf_ct_frag6_queue, lru_list);
- atomic_inc(&fq->refcnt);
+ fq = list_entry(tmp, struct nf_ct_frag6_queue, q.lru_list);
+ atomic_inc(&fq->q.refcnt);
read_unlock(&nf_ct_frag6_lock);
- spin_lock(&fq->lock);
- if (!(fq->last_in&COMPLETE))
+ spin_lock(&fq->q.lock);
+ if (!(fq->q.last_in&COMPLETE))
fq_kill(fq);
- spin_unlock(&fq->lock);
+ spin_unlock(&fq->q.lock);
fq_put(fq, &work);
}
{
struct nf_ct_frag6_queue *fq = (struct nf_ct_frag6_queue *) data;
- spin_lock(&fq->lock);
+ spin_lock(&fq->q.lock);
- if (fq->last_in & COMPLETE)
+ if (fq->q.last_in & COMPLETE)
goto out;
fq_kill(fq);
out:
- spin_unlock(&fq->lock);
+ spin_unlock(&fq->q.lock);
fq_put(fq, NULL);
}
write_lock(&nf_ct_frag6_lock);
#ifdef CONFIG_SMP
- hlist_for_each_entry(fq, n, &nf_ct_frag6_hash[hash], list) {
+ hlist_for_each_entry(fq, n, &nf_ct_frag6_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->refcnt);
+ atomic_inc(&fq->q.refcnt);
write_unlock(&nf_ct_frag6_lock);
- fq_in->last_in |= COMPLETE;
+ fq_in->q.last_in |= COMPLETE;
fq_put(fq_in, NULL);
return fq;
}
#endif
fq = fq_in;
- if (!mod_timer(&fq->timer, jiffies + nf_ct_frag6_timeout))
- atomic_inc(&fq->refcnt);
+ if (!mod_timer(&fq->q.timer, jiffies + nf_ct_frag6_timeout))
+ atomic_inc(&fq->q.refcnt);
- atomic_inc(&fq->refcnt);
- hlist_add_head(&fq->list, &nf_ct_frag6_hash[hash]);
- INIT_LIST_HEAD(&fq->lru_list);
- list_add_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
+ atomic_inc(&fq->q.refcnt);
+ hlist_add_head(&fq->q.list, &nf_ct_frag6_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);
return fq;
ipv6_addr_copy(&fq->saddr, src);
ipv6_addr_copy(&fq->daddr, dst);
- setup_timer(&fq->timer, nf_ct_frag6_expire, (unsigned long)fq);
- spin_lock_init(&fq->lock);
- atomic_set(&fq->refcnt, 1);
+ setup_timer(&fq->q.timer, nf_ct_frag6_expire, (unsigned long)fq);
+ spin_lock_init(&fq->q.lock);
+ atomic_set(&fq->q.refcnt, 1);
return nf_ct_frag6_intern(hash, fq);
unsigned int hash = ip6qhashfn(id, src, dst);
read_lock(&nf_ct_frag6_lock);
- hlist_for_each_entry(fq, n, &nf_ct_frag6_hash[hash], list) {
+ hlist_for_each_entry(fq, n, &nf_ct_frag6_hash[hash], q.list) {
if (fq->id == id &&
ipv6_addr_equal(src, &fq->saddr) &&
ipv6_addr_equal(dst, &fq->daddr)) {
- atomic_inc(&fq->refcnt);
+ atomic_inc(&fq->q.refcnt);
read_unlock(&nf_ct_frag6_lock);
return fq;
}
struct sk_buff *prev, *next;
int offset, end;
- if (fq->last_in & COMPLETE) {
+ if (fq->q.last_in & COMPLETE) {
pr_debug("Allready completed\n");
goto err;
}
/* If we already have some bits beyond end
* or have different end, the segment is corrupted.
*/
- if (end < fq->len ||
- ((fq->last_in & LAST_IN) && end != fq->len)) {
+ if (end < fq->q.len ||
+ ((fq->q.last_in & LAST_IN) && end != fq->q.len)) {
pr_debug("already received last fragment\n");
goto err;
}
- fq->last_in |= LAST_IN;
- fq->len = end;
+ fq->q.last_in |= LAST_IN;
+ fq->q.len = end;
} else {
/* Check if the fragment is rounded to 8 bytes.
* Required by the RFC.
pr_debug("end of fragment not rounded to 8 bytes.\n");
return -1;
}
- if (end > fq->len) {
+ if (end > fq->q.len) {
/* Some bits beyond end -> corruption. */
- if (fq->last_in & LAST_IN) {
+ if (fq->q.last_in & LAST_IN) {
pr_debug("last packet already reached.\n");
goto err;
}
- fq->len = end;
+ fq->q.len = end;
}
}
* this fragment, right?
*/
prev = NULL;
- for (next = fq->fragments; next != NULL; next = next->next) {
+ for (next = fq->q.fragments; next != NULL; next = next->next) {
if (NFCT_FRAG6_CB(next)->offset >= offset)
break; /* bingo! */
prev = next;
/* next fragment */
NFCT_FRAG6_CB(next)->offset += i;
- fq->meat -= i;
+ fq->q.meat -= i;
if (next->ip_summed != CHECKSUM_UNNECESSARY)
next->ip_summed = CHECKSUM_NONE;
break;
if (prev)
prev->next = next;
else
- fq->fragments = next;
+ fq->q.fragments = next;
- fq->meat -= free_it->len;
+ fq->q.meat -= free_it->len;
frag_kfree_skb(free_it, NULL);
}
}
if (prev)
prev->next = skb;
else
- fq->fragments = skb;
+ fq->q.fragments = skb;
skb->dev = NULL;
- fq->stamp = skb->tstamp;
- fq->meat += skb->len;
+ fq->q.stamp = skb->tstamp;
+ fq->q.meat += skb->len;
atomic_add(skb->truesize, &nf_ct_frag6_mem);
/* The first fragment.
*/
if (offset == 0) {
fq->nhoffset = nhoff;
- fq->last_in |= FIRST_IN;
+ fq->q.last_in |= FIRST_IN;
}
write_lock(&nf_ct_frag6_lock);
- list_move_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
+ list_move_tail(&fq->q.lru_list, &nf_ct_frag6_lru_list);
write_unlock(&nf_ct_frag6_lock);
return 0;
static struct sk_buff *
nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
{
- struct sk_buff *fp, *op, *head = fq->fragments;
+ struct sk_buff *fp, *op, *head = fq->q.fragments;
int payload_len;
fq_kill(fq);
/* Unfragmented part is taken from the first segment. */
payload_len = ((head->data - skb_network_header(head)) -
- sizeof(struct ipv6hdr) + fq->len -
+ sizeof(struct ipv6hdr) + fq->q.len -
sizeof(struct frag_hdr));
if (payload_len > IPV6_MAXPLEN) {
pr_debug("payload len is too large.\n");
head->next = NULL;
head->dev = dev;
- head->tstamp = fq->stamp;
+ head->tstamp = fq->q.stamp;
ipv6_hdr(head)->payload_len = htons(payload_len);
/* Yes, and fold redundant checksum back. 8) */
skb_network_header_len(head),
head->csum);
- fq->fragments = NULL;
+ fq->q.fragments = NULL;
/* all original skbs are linked into the NFCT_FRAG6_CB(head).orig */
fp = skb_shinfo(head)->frag_list;
goto ret_orig;
}
- spin_lock(&fq->lock);
+ spin_lock(&fq->q.lock);
if (nf_ct_frag6_queue(fq, clone, fhdr, nhoff) < 0) {
- spin_unlock(&fq->lock);
+ spin_unlock(&fq->q.lock);
pr_debug("Can't insert skb to queue\n");
fq_put(fq, NULL);
goto ret_orig;
}
- if (fq->last_in == (FIRST_IN|LAST_IN) && fq->meat == fq->len) {
+ if (fq->q.last_in == (FIRST_IN|LAST_IN) && fq->q.meat == fq->q.len) {
ret_skb = nf_ct_frag6_reasm(fq, dev);
if (ret_skb == NULL)
pr_debug("Can't reassemble fragmented packets\n");
}
- spin_unlock(&fq->lock);
+ spin_unlock(&fq->q.lock);
fq_put(fq, NULL);
return ret_skb;
#include <net/rawv6.h>
#include <net/ndisc.h>
#include <net/addrconf.h>
+#include <net/inet_frag.h>
int sysctl_ip6frag_high_thresh __read_mostly = 256*1024;
int sysctl_ip6frag_low_thresh __read_mostly = 192*1024;
struct frag_queue
{
- struct hlist_node list;
- struct list_head lru_list; /* lru list member */
+ struct inet_frag_queue q;
__be32 id; /* fragment id */
struct in6_addr saddr;
struct in6_addr daddr;
- spinlock_t lock;
- atomic_t refcnt;
- struct timer_list timer; /* expire timer */
- struct sk_buff *fragments;
- int len;
- int meat;
int iif;
- ktime_t stamp;
unsigned int csum;
- __u8 last_in; /* has first/last segment arrived? */
-#define COMPLETE 4
-#define FIRST_IN 2
-#define LAST_IN 1
__u16 nhoffset;
};
static __inline__ void __fq_unlink(struct frag_queue *fq)
{
- hlist_del(&fq->list);
- list_del(&fq->lru_list);
+ hlist_del(&fq->q.list);
+ list_del(&fq->q.lru_list);
ip6_frag_nqueues--;
}
struct frag_queue *q;
struct hlist_node *p, *n;
- hlist_for_each_entry_safe(q, p, n, &ip6_frag_hash[i], list) {
+ hlist_for_each_entry_safe(q, p, n, &ip6_frag_hash[i], q.list) {
unsigned int hval = ip6qhashfn(q->id,
&q->saddr,
&q->daddr);
if (hval != i) {
- hlist_del(&q->list);
+ hlist_del(&q->q.list);
/* Relink to new hash chain. */
- hlist_add_head(&q->list,
+ hlist_add_head(&q->q.list,
&ip6_frag_hash[hval]);
}
{
struct sk_buff *fp;
- BUG_TRAP(fq->last_in&COMPLETE);
- BUG_TRAP(del_timer(&fq->timer) == 0);
+ BUG_TRAP(fq->q.last_in&COMPLETE);
+ BUG_TRAP(del_timer(&fq->q.timer) == 0);
/* Release all fragment data. */
- fp = fq->fragments;
+ fp = fq->q.fragments;
while (fp) {
struct sk_buff *xp = fp->next;
static __inline__ void fq_put(struct frag_queue *fq, int *work)
{
- if (atomic_dec_and_test(&fq->refcnt))
+ if (atomic_dec_and_test(&fq->q.refcnt))
ip6_frag_destroy(fq, work);
}
*/
static __inline__ void fq_kill(struct frag_queue *fq)
{
- if (del_timer(&fq->timer))
- atomic_dec(&fq->refcnt);
+ if (del_timer(&fq->q.timer))
+ atomic_dec(&fq->q.refcnt);
- if (!(fq->last_in & COMPLETE)) {
+ if (!(fq->q.last_in & COMPLETE)) {
fq_unlink(fq);
- atomic_dec(&fq->refcnt);
- fq->last_in |= COMPLETE;
+ atomic_dec(&fq->q.refcnt);
+ fq->q.last_in |= COMPLETE;
}
}
return;
}
tmp = ip6_frag_lru_list.next;
- fq = list_entry(tmp, struct frag_queue, lru_list);
- atomic_inc(&fq->refcnt);
+ fq = list_entry(tmp, struct frag_queue, q.lru_list);
+ atomic_inc(&fq->q.refcnt);
read_unlock(&ip6_frag_lock);
- spin_lock(&fq->lock);
- if (!(fq->last_in&COMPLETE))
+ spin_lock(&fq->q.lock);
+ if (!(fq->q.last_in&COMPLETE))
fq_kill(fq);
- spin_unlock(&fq->lock);
+ spin_unlock(&fq->q.lock);
fq_put(fq, &work);
IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS);
struct frag_queue *fq = (struct frag_queue *) data;
struct net_device *dev = NULL;
- spin_lock(&fq->lock);
+ spin_lock(&fq->q.lock);
- if (fq->last_in & COMPLETE)
+ if (fq->q.last_in & COMPLETE)
goto out;
fq_kill(fq);
rcu_read_unlock();
/* Don't send error if the first segment did not arrive. */
- if (!(fq->last_in&FIRST_IN) || !fq->fragments)
+ if (!(fq->q.last_in&FIRST_IN) || !fq->q.fragments)
goto out;
/*
segment was received. And do not use fq->dev
pointer directly, device might already disappeared.
*/
- fq->fragments->dev = dev;
- icmpv6_send(fq->fragments, ICMPV6_TIME_EXCEED, ICMPV6_EXC_FRAGTIME, 0, dev);
+ fq->q.fragments->dev = dev;
+ icmpv6_send(fq->q.fragments, ICMPV6_TIME_EXCEED, ICMPV6_EXC_FRAGTIME, 0, dev);
out:
if (dev)
dev_put(dev);
- spin_unlock(&fq->lock);
+ spin_unlock(&fq->q.lock);
fq_put(fq, NULL);
}
write_lock(&ip6_frag_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], list) {
+ hlist_for_each_entry(fq, n, &ip6_frag_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->refcnt);
+ atomic_inc(&fq->q.refcnt);
write_unlock(&ip6_frag_lock);
- fq_in->last_in |= COMPLETE;
+ fq_in->q.last_in |= COMPLETE;
fq_put(fq_in, NULL);
return fq;
}
#endif
fq = fq_in;
- if (!mod_timer(&fq->timer, jiffies + sysctl_ip6frag_time))
- atomic_inc(&fq->refcnt);
+ if (!mod_timer(&fq->q.timer, jiffies + sysctl_ip6frag_time))
+ atomic_inc(&fq->q.refcnt);
- atomic_inc(&fq->refcnt);
- hlist_add_head(&fq->list, &ip6_frag_hash[hash]);
- INIT_LIST_HEAD(&fq->lru_list);
- list_add_tail(&fq->lru_list, &ip6_frag_lru_list);
+ atomic_inc(&fq->q.refcnt);
+ hlist_add_head(&fq->q.list, &ip6_frag_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);
return fq;
ipv6_addr_copy(&fq->saddr, src);
ipv6_addr_copy(&fq->daddr, dst);
- init_timer(&fq->timer);
- fq->timer.function = ip6_frag_expire;
- fq->timer.data = (long) fq;
- spin_lock_init(&fq->lock);
- atomic_set(&fq->refcnt, 1);
+ init_timer(&fq->q.timer);
+ fq->q.timer.function = ip6_frag_expire;
+ fq->q.timer.data = (long) fq;
+ spin_lock_init(&fq->q.lock);
+ atomic_set(&fq->q.refcnt, 1);
return ip6_frag_intern(fq);
read_lock(&ip6_frag_lock);
hash = ip6qhashfn(id, src, dst);
- hlist_for_each_entry(fq, n, &ip6_frag_hash[hash], list) {
+ hlist_for_each_entry(fq, n, &ip6_frag_hash[hash], q.list) {
if (fq->id == id &&
ipv6_addr_equal(src, &fq->saddr) &&
ipv6_addr_equal(dst, &fq->daddr)) {
- atomic_inc(&fq->refcnt);
+ atomic_inc(&fq->q.refcnt);
read_unlock(&ip6_frag_lock);
return fq;
}
struct net_device *dev;
int offset, end;
- if (fq->last_in & COMPLETE)
+ if (fq->q.last_in & COMPLETE)
goto err;
offset = ntohs(fhdr->frag_off) & ~0x7;
/* If we already have some bits beyond end
* or have different end, the segment is corrupted.
*/
- if (end < fq->len ||
- ((fq->last_in & LAST_IN) && end != fq->len))
+ if (end < fq->q.len ||
+ ((fq->q.last_in & LAST_IN) && end != fq->q.len))
goto err;
- fq->last_in |= LAST_IN;
- fq->len = end;
+ fq->q.last_in |= LAST_IN;
+ fq->q.len = end;
} else {
/* Check if the fragment is rounded to 8 bytes.
* Required by the RFC.
offsetof(struct ipv6hdr, payload_len));
return -1;
}
- if (end > fq->len) {
+ if (end > fq->q.len) {
/* Some bits beyond end -> corruption. */
- if (fq->last_in & LAST_IN)
+ if (fq->q.last_in & LAST_IN)
goto err;
- fq->len = end;
+ fq->q.len = end;
}
}
* this fragment, right?
*/
prev = NULL;
- for(next = fq->fragments; next != NULL; next = next->next) {
+ for(next = fq->q.fragments; next != NULL; next = next->next) {
if (FRAG6_CB(next)->offset >= offset)
break; /* bingo! */
prev = next;
if (!pskb_pull(next, i))
goto err;
FRAG6_CB(next)->offset += i; /* next fragment */
- fq->meat -= i;
+ fq->q.meat -= i;
if (next->ip_summed != CHECKSUM_UNNECESSARY)
next->ip_summed = CHECKSUM_NONE;
break;
if (prev)
prev->next = next;
else
- fq->fragments = next;
+ fq->q.fragments = next;
- fq->meat -= free_it->len;
+ fq->q.meat -= free_it->len;
frag_kfree_skb(free_it, NULL);
}
}
if (prev)
prev->next = skb;
else
- fq->fragments = skb;
+ fq->q.fragments = skb;
dev = skb->dev;
if (dev) {
fq->iif = dev->ifindex;
skb->dev = NULL;
}
- fq->stamp = skb->tstamp;
- fq->meat += skb->len;
+ fq->q.stamp = skb->tstamp;
+ fq->q.meat += skb->len;
atomic_add(skb->truesize, &ip6_frag_mem);
/* The first fragment.
*/
if (offset == 0) {
fq->nhoffset = nhoff;
- fq->last_in |= FIRST_IN;
+ fq->q.last_in |= FIRST_IN;
}
- if (fq->last_in == (FIRST_IN | LAST_IN) && fq->meat == fq->len)
+ 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->lru_list, &ip6_frag_lru_list);
+ list_move_tail(&fq->q.lru_list, &ip6_frag_lru_list);
write_unlock(&ip6_frag_lock);
return -1;
static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
struct net_device *dev)
{
- struct sk_buff *fp, *head = fq->fragments;
+ struct sk_buff *fp, *head = fq->q.fragments;
int payload_len;
unsigned int nhoff;
fp->next = head->next;
prev->next = fp;
- skb_morph(head, fq->fragments);
- head->next = fq->fragments->next;
+ skb_morph(head, fq->q.fragments);
+ head->next = fq->q.fragments->next;
- kfree_skb(fq->fragments);
- fq->fragments = head;
+ kfree_skb(fq->q.fragments);
+ fq->q.fragments = head;
}
BUG_TRAP(head != NULL);
/* Unfragmented part is taken from the first segment. */
payload_len = ((head->data - skb_network_header(head)) -
- sizeof(struct ipv6hdr) + fq->len -
+ sizeof(struct ipv6hdr) + fq->q.len -
sizeof(struct frag_hdr));
if (payload_len > IPV6_MAXPLEN)
goto out_oversize;
head->next = NULL;
head->dev = dev;
- head->tstamp = fq->stamp;
+ head->tstamp = fq->q.stamp;
ipv6_hdr(head)->payload_len = htons(payload_len);
IP6CB(head)->nhoff = nhoff;
rcu_read_lock();
IP6_INC_STATS_BH(__in6_dev_get(dev), IPSTATS_MIB_REASMOKS);
rcu_read_unlock();
- fq->fragments = NULL;
+ fq->q.fragments = NULL;
return 1;
out_oversize:
ip6_dst_idev(skb->dst))) != NULL) {
int ret;
- spin_lock(&fq->lock);
+ spin_lock(&fq->q.lock);
ret = ip6_frag_queue(fq, skb, fhdr, IP6CB(skb)->nhoff);
- spin_unlock(&fq->lock);
+ spin_unlock(&fq->q.lock);
fq_put(fq, NULL);
return ret;
}
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff