net: frag helper functions for mem limit tracking

This change is primarily a preparation to ease the extension of memory
limit tracking.

The change does reduce the number atomic operation, during freeing of
a frag queue.  This does introduce a some performance improvement, as
these atomic operations are at the core of the performance problems
seen on NUMA systems.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index e5253ec9e0fc..18cb8defcdb2 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -327,7 +327,7 @@ found:
         }
         fq->q.stamp = skb->tstamp;
         fq->q.meat += skb->len;
-        atomic_add(skb->truesize, &fq->q.net->mem);
+        add_frag_mem_limit(&fq->q, skb->truesize);
 
         /* The first fragment.
          * nhoffset is obtained from the first fragment, of course.
@@ -429,7 +429,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
                 head->len -= clone->len;
                 clone->csum = 0;
                 clone->ip_summed = head->ip_summed;
-                atomic_add(clone->truesize, &fq->q.net->mem);
+                add_frag_mem_limit(&fq->q, clone->truesize);
         }
 
         /* We have to remove fragment header from datagram and to relocate
@@ -467,7 +467,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
                 }
                 fp = next;
         }
-        atomic_sub(sum_truesize, &fq->q.net->mem);
+        sub_frag_mem_limit(&fq->q, sum_truesize);
 
         head->next = NULL;
         head->dev = dev;