[INET]: Consolidate the xxx_frag_destroy
To make in possible we need to know the exact frag queue
size for inet_frags->mem management and two callbacks:
* to destoy the skb (optional, used in conntracks only)
* to free the queue itself (mandatory, but later I plan to
move the allocation and the destruction of frag_queues
into the common place, so this callback will most likely
be optional too).
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index ec10e05..15fb2c4 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -17,6 +17,8 @@
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/random.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
#include <net/inet_frag.h>
@@ -100,3 +102,41 @@
}
EXPORT_SYMBOL(inet_frag_kill);
+
+static inline void frag_kfree_skb(struct inet_frags *f, struct sk_buff *skb,
+ int *work)
+{
+ if (work)
+ *work -= skb->truesize;
+
+ atomic_sub(skb->truesize, &f->mem);
+ if (f->skb_free)
+ f->skb_free(skb);
+ kfree_skb(skb);
+}
+
+void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
+ int *work)
+{
+ struct sk_buff *fp;
+
+ BUG_TRAP(q->last_in & COMPLETE);
+ BUG_TRAP(del_timer(&q->timer) == 0);
+
+ /* Release all fragment data. */
+ fp = q->fragments;
+ while (fp) {
+ struct sk_buff *xp = fp->next;
+
+ frag_kfree_skb(f, fp, work);
+ fp = xp;
+ }
+
+ if (work)
+ *work -= f->qsize;
+ atomic_sub(f->qsize, &f->mem);
+
+ f->destructor(q);
+
+}
+EXPORT_SYMBOL(inet_frag_destroy);