[INET]: Move common fields from frag_queues in one place.
Introduce the struct inet_frag_queue in include/net/inet_frag.h
file and place there all the common fields from three structs:
* struct ipq in ipv4/ip_fragment.c
* struct nf_ct_frag6_queue in nf_conntrack_reasm.c
* struct frag_queue in ipv6/reassembly.c
After this, replace these fields on appropriate structures with
this structure instance and fix the users to use correct names
i.e. hunks like
- atomic_dec(&fq->refcnt);
+ atomic_dec(&fq->q.refcnt);
(these occupy most of the patch)
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 32108cf..428eaa5 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -39,6 +39,7 @@
#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>
@@ -74,25 +75,13 @@
/* 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;
@@ -114,8 +103,8 @@
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--;
}
@@ -147,15 +136,15 @@
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]);
}
}
}
@@ -201,14 +190,14 @@
{
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;
@@ -222,7 +211,7 @@
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);
}
@@ -231,13 +220,13 @@
*/
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;
}
}
@@ -261,14 +250,14 @@
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);
@@ -282,9 +271,9 @@
{
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);
@@ -292,8 +281,8 @@
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);
@@ -301,7 +290,7 @@
}
}
out:
- spin_unlock(&qp->lock);
+ spin_unlock(&qp->q.lock);
ipq_put(qp, NULL);
}
@@ -323,15 +312,15 @@
* 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;
}
@@ -339,13 +328,13 @@
#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;
@@ -360,23 +349,23 @@
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);
@@ -400,13 +389,13 @@
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;
}
@@ -432,7 +421,7 @@
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);
@@ -445,22 +434,22 @@
{
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;
@@ -475,7 +464,7 @@
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) &&
@@ -500,22 +489,22 @@
/* 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)
@@ -534,7 +523,7 @@
* 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;
@@ -572,7 +561,7 @@
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;
@@ -587,9 +576,9 @@
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);
}
}
@@ -601,24 +590,24 @@
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;
@@ -634,7 +623,7 @@
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;
@@ -652,11 +641,11 @@
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);
@@ -664,7 +653,7 @@
/* 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)
@@ -715,13 +704,13 @@
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:
@@ -753,11 +742,11 @@
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;
}