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authorDavid S. Miller <davem@davemloft.net>2017-09-05 20:03:35 -0700
committerDavid S. Miller <davem@davemloft.net>2017-09-05 20:03:35 -0700
commit18fb0b46d555dc42f52f69428dcd52f133877078 (patch)
tree7696741f50fb1a373aee3601074e30f6e366e425 /net
parent39cebdb77d55a193492a42170bf1c3d11e41e740 (diff)
parent6d9c153a0b84392406bc77600aa7d3ea365de041 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'net')
-rw-r--r--net/ieee802154/6lowpan/reassembly.c11
-rw-r--r--net/ipv4/inet_fragment.c4
-rw-r--r--net/ipv4/ip_fragment.c12
-rw-r--r--net/ipv6/netfilter/nf_conntrack_reasm.c12
-rw-r--r--net/ipv6/reassembly.c12
-rw-r--r--net/l2tp/l2tp_core.c41
-rw-r--r--net/l2tp/l2tp_core.h8
-rw-r--r--net/l2tp/l2tp_eth.c11
-rw-r--r--net/l2tp/l2tp_netlink.c8
-rw-r--r--net/l2tp/l2tp_ppp.c19
10 files changed, 62 insertions, 76 deletions
diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c
index 30d875dff6b5..f85b08baff16 100644
--- a/net/ieee802154/6lowpan/reassembly.c
+++ b/net/ieee802154/6lowpan/reassembly.c
@@ -580,19 +580,14 @@ static int __net_init lowpan_frags_init_net(struct net *net)
{
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
- int res;
ieee802154_lowpan->frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
ieee802154_lowpan->frags.low_thresh = IPV6_FRAG_LOW_THRESH;
ieee802154_lowpan->frags.timeout = IPV6_FRAG_TIMEOUT;
- res = inet_frags_init_net(&ieee802154_lowpan->frags);
- if (res)
- return res;
- res = lowpan_frags_ns_sysctl_register(net);
- if (res)
- inet_frags_uninit_net(&ieee802154_lowpan->frags);
- return res;
+ inet_frags_init_net(&ieee802154_lowpan->frags);
+
+ return lowpan_frags_ns_sysctl_register(net);
}
static void __net_exit lowpan_frags_exit_net(struct net *net)
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 96e95e83cc61..af74d0433453 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -234,10 +234,8 @@ evict_again:
cond_resched();
if (read_seqretry(&f->rnd_seqlock, seq) ||
- percpu_counter_sum(&nf->mem))
+ sum_frag_mem_limit(nf))
goto evict_again;
-
- percpu_counter_destroy(&nf->mem);
}
EXPORT_SYMBOL(inet_frags_exit_net);
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 9a8cfac503dc..46408c220d9d 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -844,8 +844,6 @@ static void __init ip4_frags_ctl_register(void)
static int __net_init ipv4_frags_init_net(struct net *net)
{
- int res;
-
/* Fragment cache limits.
*
* The fragment memory accounting code, (tries to) account for
@@ -871,13 +869,9 @@ static int __net_init ipv4_frags_init_net(struct net *net)
net->ipv4.frags.max_dist = 64;
- res = inet_frags_init_net(&net->ipv4.frags);
- if (res)
- return res;
- res = ip4_frags_ns_ctl_register(net);
- if (res)
- inet_frags_uninit_net(&net->ipv4.frags);
- return res;
+ inet_frags_init_net(&net->ipv4.frags);
+
+ return ip4_frags_ns_ctl_register(net);
}
static void __net_exit ipv4_frags_exit_net(struct net *net)
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 986d4ca38832..b263bf3a19f7 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -622,18 +622,12 @@ EXPORT_SYMBOL_GPL(nf_ct_frag6_gather);
static int nf_ct_net_init(struct net *net)
{
- int res;
-
net->nf_frag.frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
net->nf_frag.frags.low_thresh = IPV6_FRAG_LOW_THRESH;
net->nf_frag.frags.timeout = IPV6_FRAG_TIMEOUT;
- res = inet_frags_init_net(&net->nf_frag.frags);
- if (res)
- return res;
- res = nf_ct_frag6_sysctl_register(net);
- if (res)
- inet_frags_uninit_net(&net->nf_frag.frags);
- return res;
+ inet_frags_init_net(&net->nf_frag.frags);
+
+ return nf_ct_frag6_sysctl_register(net);
}
static void nf_ct_net_exit(struct net *net)
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index e1da5b888cc4..846012eae526 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -714,19 +714,13 @@ static void ip6_frags_sysctl_unregister(void)
static int __net_init ipv6_frags_init_net(struct net *net)
{
- int res;
-
net->ipv6.frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
net->ipv6.frags.low_thresh = IPV6_FRAG_LOW_THRESH;
net->ipv6.frags.timeout = IPV6_FRAG_TIMEOUT;
- res = inet_frags_init_net(&net->ipv6.frags);
- if (res)
- return res;
- res = ip6_frags_ns_sysctl_register(net);
- if (res)
- inet_frags_uninit_net(&net->ipv6.frags);
- return res;
+ inet_frags_init_net(&net->ipv6.frags);
+
+ return ip6_frags_ns_sysctl_register(net);
}
static void __net_exit ipv6_frags_exit_net(struct net *net)
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 90165a6874bc..ee485df73ccd 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -329,13 +329,21 @@ static int l2tp_session_add_to_tunnel(struct l2tp_tunnel *tunnel,
struct hlist_head *g_head;
struct hlist_head *head;
struct l2tp_net *pn;
+ int err;
head = l2tp_session_id_hash(tunnel, session->session_id);
write_lock_bh(&tunnel->hlist_lock);
+ if (!tunnel->acpt_newsess) {
+ err = -ENODEV;
+ goto err_tlock;
+ }
+
hlist_for_each_entry(session_walk, head, hlist)
- if (session_walk->session_id == session->session_id)
- goto exist;
+ if (session_walk->session_id == session->session_id) {
+ err = -EEXIST;
+ goto err_tlock;
+ }
if (tunnel->version == L2TP_HDR_VER_3) {
pn = l2tp_pernet(tunnel->l2tp_net);
@@ -343,12 +351,21 @@ static int l2tp_session_add_to_tunnel(struct l2tp_tunnel *tunnel,
session->session_id);
spin_lock_bh(&pn->l2tp_session_hlist_lock);
+
hlist_for_each_entry(session_walk, g_head, global_hlist)
- if (session_walk->session_id == session->session_id)
- goto exist_glob;
+ if (session_walk->session_id == session->session_id) {
+ err = -EEXIST;
+ goto err_tlock_pnlock;
+ }
+ l2tp_tunnel_inc_refcount(tunnel);
+ sock_hold(tunnel->sock);
hlist_add_head_rcu(&session->global_hlist, g_head);
+
spin_unlock_bh(&pn->l2tp_session_hlist_lock);
+ } else {
+ l2tp_tunnel_inc_refcount(tunnel);
+ sock_hold(tunnel->sock);
}
hlist_add_head(&session->hlist, head);
@@ -356,12 +373,12 @@ static int l2tp_session_add_to_tunnel(struct l2tp_tunnel *tunnel,
return 0;
-exist_glob:
+err_tlock_pnlock:
spin_unlock_bh(&pn->l2tp_session_hlist_lock);
-exist:
+err_tlock:
write_unlock_bh(&tunnel->hlist_lock);
- return -EEXIST;
+ return err;
}
/* Lookup a tunnel by id
@@ -1251,7 +1268,6 @@ static void l2tp_tunnel_destruct(struct sock *sk)
/* Remove hooks into tunnel socket */
sk->sk_destruct = tunnel->old_sk_destruct;
sk->sk_user_data = NULL;
- tunnel->sock = NULL;
/* Remove the tunnel struct from the tunnel list */
pn = l2tp_pernet(tunnel->l2tp_net);
@@ -1261,6 +1277,8 @@ static void l2tp_tunnel_destruct(struct sock *sk)
atomic_dec(&l2tp_tunnel_count);
l2tp_tunnel_closeall(tunnel);
+
+ tunnel->sock = NULL;
l2tp_tunnel_dec_refcount(tunnel);
/* Call the original destructor */
@@ -1285,6 +1303,7 @@ void l2tp_tunnel_closeall(struct l2tp_tunnel *tunnel)
tunnel->name);
write_lock_bh(&tunnel->hlist_lock);
+ tunnel->acpt_newsess = false;
for (hash = 0; hash < L2TP_HASH_SIZE; hash++) {
again:
hlist_for_each_safe(walk, tmp, &tunnel->session_hlist[hash]) {
@@ -1581,6 +1600,7 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32
tunnel->magic = L2TP_TUNNEL_MAGIC;
sprintf(&tunnel->name[0], "tunl %u", tunnel_id);
rwlock_init(&tunnel->hlist_lock);
+ tunnel->acpt_newsess = true;
/* The net we belong to */
tunnel->l2tp_net = net;
@@ -1829,11 +1849,6 @@ struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunnel *tunn
return ERR_PTR(err);
}
- l2tp_tunnel_inc_refcount(tunnel);
-
- /* Ensure tunnel socket isn't deleted */
- sock_hold(tunnel->sock);
-
/* Ignore management session in session count value */
if (session->session_id != 0)
atomic_inc(&l2tp_session_count);
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index 9101297f27ad..a305e0c5925a 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -162,6 +162,10 @@ struct l2tp_tunnel {
int magic; /* Should be L2TP_TUNNEL_MAGIC */
struct rcu_head rcu;
rwlock_t hlist_lock; /* protect session_hlist */
+ bool acpt_newsess; /* Indicates whether this
+ * tunnel accepts new sessions.
+ * Protected by hlist_lock.
+ */
struct hlist_head session_hlist[L2TP_HASH_SIZE];
/* hashed list of sessions,
* hashed by id */
@@ -197,7 +201,9 @@ struct l2tp_tunnel {
};
struct l2tp_nl_cmd_ops {
- int (*session_create)(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg);
+ int (*session_create)(struct net *net, struct l2tp_tunnel *tunnel,
+ u32 session_id, u32 peer_session_id,
+ struct l2tp_session_cfg *cfg);
int (*session_delete)(struct l2tp_session *session);
};
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index 4de2ec94b08c..87da9ef61860 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -262,24 +262,19 @@ static void l2tp_eth_adjust_mtu(struct l2tp_tunnel *tunnel,
dev->needed_headroom += session->hdr_len;
}
-static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
+static int l2tp_eth_create(struct net *net, struct l2tp_tunnel *tunnel,
+ u32 session_id, u32 peer_session_id,
+ struct l2tp_session_cfg *cfg)
{
unsigned char name_assign_type;
struct net_device *dev;
char name[IFNAMSIZ];
- struct l2tp_tunnel *tunnel;
struct l2tp_session *session;
struct l2tp_eth *priv;
struct l2tp_eth_sess *spriv;
int rc;
struct l2tp_eth_net *pn;
- tunnel = l2tp_tunnel_find(net, tunnel_id);
- if (!tunnel) {
- rc = -ENODEV;
- goto out;
- }
-
if (cfg->ifname) {
strlcpy(name, cfg->ifname, IFNAMSIZ);
name_assign_type = NET_NAME_USER;
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index 57427d430f10..7135f4645d3a 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -643,10 +643,10 @@ static int l2tp_nl_cmd_session_create(struct sk_buff *skb, struct genl_info *inf
break;
}
- ret = -EPROTONOSUPPORT;
- if (l2tp_nl_cmd_ops[cfg.pw_type]->session_create)
- ret = (*l2tp_nl_cmd_ops[cfg.pw_type]->session_create)(net, tunnel_id,
- session_id, peer_session_id, &cfg);
+ ret = l2tp_nl_cmd_ops[cfg.pw_type]->session_create(net, tunnel,
+ session_id,
+ peer_session_id,
+ &cfg);
if (ret >= 0) {
session = l2tp_session_get(net, tunnel, session_id, false);
diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index f0edb7209079..50e3ee9a9d61 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -788,25 +788,20 @@ end:
#ifdef CONFIG_L2TP_V3
-/* Called when creating sessions via the netlink interface.
- */
-static int pppol2tp_session_create(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg)
+/* Called when creating sessions via the netlink interface. */
+static int pppol2tp_session_create(struct net *net, struct l2tp_tunnel *tunnel,
+ u32 session_id, u32 peer_session_id,
+ struct l2tp_session_cfg *cfg)
{
int error;
- struct l2tp_tunnel *tunnel;
struct l2tp_session *session;
struct pppol2tp_session *ps;
- tunnel = l2tp_tunnel_find(net, tunnel_id);
-
- /* Error if we can't find the tunnel */
- error = -ENOENT;
- if (tunnel == NULL)
- goto out;
-
/* Error if tunnel socket is not prepped */
- if (tunnel->sock == NULL)
+ if (!tunnel->sock) {
+ error = -ENOENT;
goto out;
+ }
/* Default MTU values. */
if (cfg->mtu == 0)