net: add a net pointer to struct fqdir

fqdir will soon be dynamically allocated.

We need to reach the struct net pointer from fqdir,
so add it, and replace the various container_of() constructs
by direct access to the new field.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index fca246b..37cde5c 100644 (file)
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -12,6 +12,7 @@ struct fqdir {
        int                     timeout;
        int                     max_dist;
        struct inet_frags       *f;
+       struct net              *net;
 
        struct rhashtable       rhashtable ____cacheline_aligned_in_smp;
 
@@ -104,9 +105,11 @@ struct inet_frags {
 int inet_frags_init(struct inet_frags *);
 void inet_frags_fini(struct inet_frags *);
 
-static inline int fqdir_init(struct fqdir *fqdir, struct inet_frags *f)
+static inline int fqdir_init(struct fqdir *fqdir, struct inet_frags *f,
+                            struct net *net)
 {
        fqdir->f = f;
+       fqdir->net = net;
        atomic_long_set(&fqdir->mem, 0);
        return rhashtable_init(&fqdir->rhashtable, &fqdir->f->rhash_params);
 }

diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c
index 82db76c..03a444c 100644 (file)
--- a/net/ieee802154/6lowpan/reassembly.c
+++ b/net/ieee802154/6lowpan/reassembly.c
@@ -453,7 +453,7 @@ static int __net_init lowpan_frags_init_net(struct net *net)
        ieee802154_lowpan->fqdir.low_thresh = IPV6_FRAG_LOW_THRESH;
        ieee802154_lowpan->fqdir.timeout = IPV6_FRAG_TIMEOUT;
 
-       res = fqdir_init(&ieee802154_lowpan->fqdir, &lowpan_frags);
+       res = fqdir_init(&ieee802154_lowpan->fqdir, &lowpan_frags, net);
        if (res < 0)
                return res;
        res = lowpan_frags_ns_sysctl_register(net);

diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index d95592d..d59269b 100644 (file)
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -82,9 +82,7 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *skb,
 static void ip4_frag_init(struct inet_frag_queue *q, const void *a)
 {
        struct ipq *qp = container_of(q, struct ipq, q);
-       struct netns_ipv4 *ipv4 = container_of(q->fqdir, struct netns_ipv4,
-                                              fqdir);
-       struct net *net = container_of(ipv4, struct net, ipv4);
+       struct net *net = q->fqdir->net;
 
        const struct frag_v4_compare_key *key = a;
 
@@ -142,7 +140,7 @@ static void ip_expire(struct timer_list *t)
        int err;
 
        qp = container_of(frag, struct ipq, q);
-       net = container_of(qp->q.fqdir, struct net, ipv4.fqdir);
+       net = qp->q.fqdir->net;
 
        rcu_read_lock();
        spin_lock(&qp->q.lock);
@@ -236,12 +234,8 @@ static int ip_frag_too_far(struct ipq *qp)
 
        rc = qp->q.fragments_tail && (end - start) > max;
 
-       if (rc) {
-               struct net *net;
-
-               net = container_of(qp->q.fqdir, struct net, ipv4.fqdir);
-               __IP_INC_STATS(net, IPSTATS_MIB_REASMFAILS);
-       }
+       if (rc)
+               __IP_INC_STATS(qp->q.fqdir->net, IPSTATS_MIB_REASMFAILS);
 
        return rc;
 }
@@ -273,7 +267,7 @@ static int ip_frag_reinit(struct ipq *qp)
 /* Add new segment to existing queue. */
 static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
 {
-       struct net *net = container_of(qp->q.fqdir, struct net, ipv4.fqdir);
+       struct net *net = qp->q.fqdir->net;
        int ihl, end, flags, offset;
        struct sk_buff *prev_tail;
        struct net_device *dev;
@@ -399,7 +393,7 @@ err:
 static int ip_frag_reasm(struct ipq *qp, struct sk_buff *skb,
                         struct sk_buff *prev_tail, struct net_device *dev)
 {
-       struct net *net = container_of(qp->q.fqdir, struct net, ipv4.fqdir);
+       struct net *net = qp->q.fqdir->net;
        struct iphdr *iph;
        void *reasm_data;
        int len, err;
@@ -673,7 +667,7 @@ static int __net_init ipv4_frags_init_net(struct net *net)
 
        net->ipv4.fqdir.max_dist = 64;
 
-       res = fqdir_init(&net->ipv4.fqdir, &ip4_frags);
+       res = fqdir_init(&net->ipv4.fqdir, &ip4_frags, net);
        if (res < 0)
                return res;
        res = ip4_frags_ns_ctl_register(net);

diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index e72a1cc..b6f7385 100644 (file)
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -143,12 +143,10 @@ static void nf_ct_frag6_expire(struct timer_list *t)
 {
        struct inet_frag_queue *frag = from_timer(frag, t, timer);
        struct frag_queue *fq;
-       struct net *net;
 
        fq = container_of(frag, struct frag_queue, q);
-       net = container_of(fq->q.fqdir, struct net, nf_frag.fqdir);
 
-       ip6frag_expire_frag_queue(net, fq);
+       ip6frag_expire_frag_queue(fq->q.fqdir->net, fq);
 }
 
 /* Creation primitives. */
@@ -495,7 +493,7 @@ static int nf_ct_net_init(struct net *net)
        net->nf_frag.fqdir.low_thresh = IPV6_FRAG_LOW_THRESH;
        net->nf_frag.fqdir.timeout = IPV6_FRAG_TIMEOUT;
 
-       res = fqdir_init(&net->nf_frag.fqdir, &nf_frags);
+       res = fqdir_init(&net->nf_frag.fqdir, &nf_frags, net);
        if (res < 0)
                return res;
        res = nf_ct_frag6_sysctl_register(net);

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 8235c5a..a6f26aa 100644 (file)
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -76,12 +76,10 @@ static void ip6_frag_expire(struct timer_list *t)
 {
        struct inet_frag_queue *frag = from_timer(frag, t, timer);
        struct frag_queue *fq;
-       struct net *net;
 
        fq = container_of(frag, struct frag_queue, q);
-       net = container_of(fq->q.fqdir, struct net, ipv6.fqdir);
 
-       ip6frag_expire_frag_queue(net, fq);
+       ip6frag_expire_frag_queue(fq->q.fqdir->net, fq);
 }
 
 static struct frag_queue *
@@ -254,7 +252,7 @@ err:
 static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *skb,
                          struct sk_buff *prev_tail, struct net_device *dev)
 {
-       struct net *net = container_of(fq->q.fqdir, struct net, ipv6.fqdir);
+       struct net *net = fq->q.fqdir->net;
        unsigned int nhoff;
        void *reasm_data;
        int payload_len;
@@ -516,7 +514,7 @@ static int __net_init ipv6_frags_init_net(struct net *net)
        net->ipv6.fqdir.low_thresh = IPV6_FRAG_LOW_THRESH;
        net->ipv6.fqdir.timeout = IPV6_FRAG_TIMEOUT;
 
-       res = fqdir_init(&net->ipv6.fqdir, &ip6_frags);
+       res = fqdir_init(&net->ipv6.fqdir, &ip6_frags, net);
        if (res < 0)
                return res;