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6lowpan: add helper to get 6lowpan namespace 

This will simplify the new reassembly backport
with no code changes being required.

CC: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: linux-zigbee-devel@lists.sourceforge.net
Cc: David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Luis R. Rodriguez 2014-04-17 18:22:54 -07:00 committed by David S. Miller
parent 8465a5fcd1
commit 599018a710
2 changed files with 45 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
include/net/net_namespace.h
View File

@ -373,6 +373,21 @@ static inline void rt_genid_bump_ipv6(struct net *net)
}
#endif
#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
static inline struct netns_ieee802154_lowpan *
net_ieee802154_lowpan(struct net *net)
{
return &net->ieee802154_lowpan;
}
#else
static inline struct netns_ieee802154_lowpan *
net_ieee802154_lowpan(struct net *net)
{
return NULL;
}
#endif
/* For callers who don't really care about whether it's IPv4 or IPv6 */
static inline void rt_genid_bump_all(struct net *net)
{

46
net/ieee802154/reassembly.c
View File

@ -120,6 +120,8 @@ fq_find(struct net *net, const struct lowpan_frag_info *frag_info,
struct inet_frag_queue *q;
struct lowpan_create_arg arg;
unsigned int hash;
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
arg.tag = frag_info->d_tag;
arg.d_size = frag_info->d_size;
@ -129,7 +131,7 @@ fq_find(struct net *net, const struct lowpan_frag_info *frag_info,
read_lock(&lowpan_frags.lock);
hash = lowpan_hash_frag(frag_info->d_tag, frag_info->d_size, src, dst);
q = inet_frag_find(&net->ieee802154_lowpan.frags,
q = inet_frag_find(&ieee802154_lowpan->frags,
&lowpan_frags, &arg, hash);
if (IS_ERR_OR_NULL(q)) {
inet_frag_maybe_warn_overflow(q, pr_fmt());
@ -357,6 +359,8 @@ int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type)
struct net *net = dev_net(skb->dev);
struct lowpan_frag_info *frag_info = lowpan_cb(skb);
struct ieee802154_addr source, dest;
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
int err;
source = mac_cb(skb)->source;
@ -366,10 +370,10 @@ int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type)
if (err < 0)
goto err;
if (frag_info->d_size > net->ieee802154_lowpan.max_dsize)
if (frag_info->d_size > ieee802154_lowpan->max_dsize)
goto err;
inet_frag_evictor(&net->ieee802154_lowpan.frags, &lowpan_frags, false);
inet_frag_evictor(&ieee802154_lowpan->frags, &lowpan_frags, false);
fq = fq_find(net, frag_info, &source, &dest);
if (fq != NULL) {
@ -436,6 +440,8 @@ static int __net_init lowpan_frags_ns_sysctl_register(struct net *net)
{
struct ctl_table *table;
struct ctl_table_header *hdr;
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
table = lowpan_frags_ns_ctl_table;
if (!net_eq(net, &init_net)) {
@ -444,10 +450,10 @@ static int __net_init lowpan_frags_ns_sysctl_register(struct net *net)
if (table == NULL)
goto err_alloc;
table[0].data = &net->ieee802154_lowpan.frags.high_thresh;
table[1].data = &net->ieee802154_lowpan.frags.low_thresh;
table[2].data = &net->ieee802154_lowpan.frags.timeout;
table[3].data = &net->ieee802154_lowpan.max_dsize;
table[0].data = &ieee802154_lowpan->frags.high_thresh;
table[1].data = &ieee802154_lowpan->frags.low_thresh;
table[2].data = &ieee802154_lowpan->frags.timeout;
table[3].data = &ieee802154_lowpan->max_dsize;
/* Don't export sysctls to unprivileged users */
if (net->user_ns != &init_user_ns)
@ -458,7 +464,7 @@ static int __net_init lowpan_frags_ns_sysctl_register(struct net *net)
if (hdr == NULL)
goto err_reg;
net->ieee802154_lowpan.sysctl.frags_hdr = hdr;
ieee802154_lowpan->sysctl.frags_hdr = hdr;
return 0;
err_reg:
@ -471,9 +477,11 @@ err_alloc:
static void __net_exit lowpan_frags_ns_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
table = net->ieee802154_lowpan.sysctl.frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ieee802154_lowpan.sysctl.frags_hdr);
table = ieee802154_lowpan->sysctl.frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(ieee802154_lowpan->sysctl.frags_hdr);
if (!net_eq(net, &init_net))
kfree(table);
}
@ -514,20 +522,26 @@ static inline void lowpan_frags_sysctl_unregister(void)
static int __net_init lowpan_frags_init_net(struct net *net)
{
net->ieee802154_lowpan.frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
net->ieee802154_lowpan.frags.low_thresh = IPV6_FRAG_LOW_THRESH;
net->ieee802154_lowpan.frags.timeout = IPV6_FRAG_TIMEOUT;
net->ieee802154_lowpan.max_dsize = 0xFFFF;
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
inet_frags_init_net(&net->ieee802154_lowpan.frags);
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;
ieee802154_lowpan->max_dsize = 0xFFFF;
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)
{
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
lowpan_frags_ns_sysctl_unregister(net);
inet_frags_exit_net(&net->ieee802154_lowpan.frags, &lowpan_frags);
inet_frags_exit_net(&ieee802154_lowpan->frags, &lowpan_frags);
}
static struct pernet_operations lowpan_frags_ops = {