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Diffstat (limited to 'net/ipv4/ip_fragment.c')
-rw-r--r--net/ipv4/ip_fragment.c81
1 files changed, 39 insertions, 42 deletions
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index cf2b0a6a3337..4385eb9e781f 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -82,15 +82,13 @@ 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->net, struct netns_ipv4,
- frags);
- struct net *net = container_of(ipv4, struct net, ipv4);
+ struct net *net = q->fqdir->net;
const struct frag_v4_compare_key *key = a;
q->key.v4 = *key;
qp->ecn = 0;
- qp->peer = q->net->max_dist ?
+ qp->peer = q->fqdir->max_dist ?
inet_getpeer_v4(net->ipv4.peers, key->saddr, key->vif, 1) :
NULL;
}
@@ -142,9 +140,13 @@ static void ip_expire(struct timer_list *t)
int err;
qp = container_of(frag, struct ipq, q);
- net = container_of(qp->q.net, struct net, ipv4.frags);
+ net = qp->q.fqdir->net;
rcu_read_lock();
+
+ if (qp->q.fqdir->dead)
+ goto out_rcu_unlock;
+
spin_lock(&qp->q.lock);
if (qp->q.flags & INET_FRAG_COMPLETE)
@@ -211,7 +213,7 @@ static struct ipq *ip_find(struct net *net, struct iphdr *iph,
};
struct inet_frag_queue *q;
- q = inet_frag_find(&net->ipv4.frags, &key);
+ q = inet_frag_find(net->ipv4.fqdir, &key);
if (!q)
return NULL;
@@ -222,7 +224,7 @@ static struct ipq *ip_find(struct net *net, struct iphdr *iph,
static int ip_frag_too_far(struct ipq *qp)
{
struct inet_peer *peer = qp->peer;
- unsigned int max = qp->q.net->max_dist;
+ unsigned int max = qp->q.fqdir->max_dist;
unsigned int start, end;
int rc;
@@ -236,12 +238,8 @@ 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.net, struct net, ipv4.frags);
- __IP_INC_STATS(net, IPSTATS_MIB_REASMFAILS);
- }
+ if (rc)
+ __IP_INC_STATS(qp->q.fqdir->net, IPSTATS_MIB_REASMFAILS);
return rc;
}
@@ -250,13 +248,13 @@ static int ip_frag_reinit(struct ipq *qp)
{
unsigned int sum_truesize = 0;
- if (!mod_timer(&qp->q.timer, jiffies + qp->q.net->timeout)) {
+ if (!mod_timer(&qp->q.timer, jiffies + qp->q.fqdir->timeout)) {
refcount_inc(&qp->q.refcnt);
return -ETIMEDOUT;
}
sum_truesize = inet_frag_rbtree_purge(&qp->q.rb_fragments);
- sub_frag_mem_limit(qp->q.net, sum_truesize);
+ sub_frag_mem_limit(qp->q.fqdir, sum_truesize);
qp->q.flags = 0;
qp->q.len = 0;
@@ -273,7 +271,7 @@ 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.net, struct net, ipv4.frags);
+ struct net *net = qp->q.fqdir->net;
int ihl, end, flags, offset;
struct sk_buff *prev_tail;
struct net_device *dev;
@@ -352,7 +350,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
qp->q.stamp = skb->tstamp;
qp->q.meat += skb->len;
qp->ecn |= ecn;
- add_frag_mem_limit(qp->q.net, skb->truesize);
+ add_frag_mem_limit(qp->q.fqdir, skb->truesize);
if (offset == 0)
qp->q.flags |= INET_FRAG_FIRST_IN;
@@ -399,7 +397,7 @@ 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.net, struct net, ipv4.frags);
+ struct net *net = qp->q.fqdir->net;
struct iphdr *iph;
void *reasm_data;
int len, err;
@@ -544,30 +542,24 @@ static int dist_min;
static struct ctl_table ip4_frags_ns_ctl_table[] = {
{
.procname = "ipfrag_high_thresh",
- .data = &init_net.ipv4.frags.high_thresh,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
- .extra1 = &init_net.ipv4.frags.low_thresh
},
{
.procname = "ipfrag_low_thresh",
- .data = &init_net.ipv4.frags.low_thresh,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
- .extra2 = &init_net.ipv4.frags.high_thresh
},
{
.procname = "ipfrag_time",
- .data = &init_net.ipv4.frags.timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "ipfrag_max_dist",
- .data = &init_net.ipv4.frags.max_dist,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
@@ -600,13 +592,13 @@ static int __net_init ip4_frags_ns_ctl_register(struct net *net)
if (!table)
goto err_alloc;
- table[0].data = &net->ipv4.frags.high_thresh;
- table[0].extra1 = &net->ipv4.frags.low_thresh;
- table[1].data = &net->ipv4.frags.low_thresh;
- table[1].extra2 = &net->ipv4.frags.high_thresh;
- table[2].data = &net->ipv4.frags.timeout;
- table[3].data = &net->ipv4.frags.max_dist;
}
+ table[0].data = &net->ipv4.fqdir->high_thresh;
+ table[0].extra1 = &net->ipv4.fqdir->low_thresh;
+ table[1].data = &net->ipv4.fqdir->low_thresh;
+ table[1].extra2 = &net->ipv4.fqdir->high_thresh;
+ table[2].data = &net->ipv4.fqdir->timeout;
+ table[3].data = &net->ipv4.fqdir->max_dist;
hdr = register_net_sysctl(net, "net/ipv4", table);
if (!hdr)
@@ -654,6 +646,9 @@ static int __net_init ipv4_frags_init_net(struct net *net)
{
int res;
+ res = fqdir_init(&net->ipv4.fqdir, &ip4_frags, net);
+ if (res < 0)
+ return res;
/* Fragment cache limits.
*
* The fragment memory accounting code, (tries to) account for
@@ -668,36 +663,38 @@ static int __net_init ipv4_frags_init_net(struct net *net)
* we will prune down to 3MB, making room for approx 8 big 64K
* fragments 8x128k.
*/
- net->ipv4.frags.high_thresh = 4 * 1024 * 1024;
- net->ipv4.frags.low_thresh = 3 * 1024 * 1024;
+ net->ipv4.fqdir->high_thresh = 4 * 1024 * 1024;
+ net->ipv4.fqdir->low_thresh = 3 * 1024 * 1024;
/*
* Important NOTE! Fragment queue must be destroyed before MSL expires.
* RFC791 is wrong proposing to prolongate timer each fragment arrival
* by TTL.
*/
- net->ipv4.frags.timeout = IP_FRAG_TIME;
+ net->ipv4.fqdir->timeout = IP_FRAG_TIME;
- net->ipv4.frags.max_dist = 64;
- net->ipv4.frags.f = &ip4_frags;
+ net->ipv4.fqdir->max_dist = 64;
- res = inet_frags_init_net(&net->ipv4.frags);
- if (res < 0)
- return res;
res = ip4_frags_ns_ctl_register(net);
if (res < 0)
- inet_frags_exit_net(&net->ipv4.frags);
+ fqdir_exit(net->ipv4.fqdir);
return res;
}
+static void __net_exit ipv4_frags_pre_exit_net(struct net *net)
+{
+ fqdir_pre_exit(net->ipv4.fqdir);
+}
+
static void __net_exit ipv4_frags_exit_net(struct net *net)
{
ip4_frags_ns_ctl_unregister(net);
- inet_frags_exit_net(&net->ipv4.frags);
+ fqdir_exit(net->ipv4.fqdir);
}
static struct pernet_operations ip4_frags_ops = {
- .init = ipv4_frags_init_net,
- .exit = ipv4_frags_exit_net,
+ .init = ipv4_frags_init_net,
+ .pre_exit = ipv4_frags_pre_exit_net,
+ .exit = ipv4_frags_exit_net,
};
generated by cgit (git 2.34.1) at 2024-05-06 17:29:25 +0000