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[INET]: Consolidate xxx_the secret_rebuild

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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 <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-10-15 02:38:08 -07:00 • committed by David S. Miller
parent 277e650ddf
commit 321a3a99e4
5 changed files with 52 additions and 90 deletions
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35
net/ipv4/inet_fragment.c
View file

@ -16,9 +16,38 @@
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/random.h>
#include <net/inet_frag.h>
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);