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authorPavel Emelyanov <xemul@openvz.org>2007-10-15 02:40:06 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-15 12:26:42 -0700
commit8e7999c44ee95e1e90ac91c83557a04e2948f160 (patch)
tree4295add7b91114fd43eef37d70b664858776dd0d /net/ipv4/inet_fragment.c
parent1e4b82873af0f21002e37a81ef063d2e5410deb3 (diff)
[INET]: Consolidate the xxx_evictor
The evictors collect some statistics for ipv4 and ipv6, so make it return the number of evicted queues and account them all at once in the caller. The XXX_ADD_STATS_BH() macros are just for this case, but maybe there are places in code, that can make use of them as well. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_fragment.c')
-rw-r--r--net/ipv4/inet_fragment.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 15fb2c4a36a..484cf512858 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -140,3 +140,35 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
}
EXPORT_SYMBOL(inet_frag_destroy);
+
+int inet_frag_evictor(struct inet_frags *f)
+{
+ struct inet_frag_queue *q;
+ int work, evicted = 0;
+
+ work = atomic_read(&f->mem) - f->ctl->low_thresh;
+ while (work > 0) {
+ read_lock(&f->lock);
+ if (list_empty(&f->lru_list)) {
+ read_unlock(&f->lock);
+ break;
+ }
+
+ q = list_first_entry(&f->lru_list,
+ struct inet_frag_queue, lru_list);
+ atomic_inc(&q->refcnt);
+ read_unlock(&f->lock);
+
+ spin_lock(&q->lock);
+ if (!(q->last_in & COMPLETE))
+ inet_frag_kill(q, f);
+ spin_unlock(&q->lock);
+
+ if (atomic_dec_and_test(&q->refcnt))
+ inet_frag_destroy(q, f, &work);
+ evicted++;
+ }
+
+ return evicted;
+}
+EXPORT_SYMBOL(inet_frag_evictor);