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Date: Fri, 8 Apr 2022 12:45:57 -0700
From: Mat Martineau <mathew.j.martineau@...ux.intel.com>
To: netdev@...r.kernel.org
Cc: Geliang Tang <geliang.tang@...e.com>, davem@...emloft.net,
kuba@...nel.org, pabeni@...hat.com, matthieu.baerts@...sares.net,
mptcp@...ts.linux.dev, Florian Westphal <fw@...len.de>,
Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 4/8] mptcp: add pm_nl_pernet helpers
From: Geliang Tang <geliang.tang@...e.com>
This patch adds two pm_nl_pernet related helpers, named pm_nl_get_pernet()
and pm_nl_get_pernet_from_msk() to get pm_nl_pernet from 'net' or 'msk'.
Use these helpers instead of using net_generic() directly.
Suggested-by: Florian Westphal <fw@...len.de>
Signed-off-by: Geliang Tang <geliang.tang@...e.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
net/mptcp/pm_netlink.c | 41 ++++++++++++++++++++++++-----------------
1 file changed, 24 insertions(+), 17 deletions(-)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index e3dcc5501579..c20261b612e9 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -55,6 +55,17 @@ struct pm_nl_pernet {
#define MPTCP_PM_ADDR_MAX 8
#define ADD_ADDR_RETRANS_MAX 3
+static struct pm_nl_pernet *pm_nl_get_pernet(const struct net *net)
+{
+ return net_generic(net, pm_nl_pernet_id);
+}
+
+static struct pm_nl_pernet *
+pm_nl_get_pernet_from_msk(const struct mptcp_sock *msk)
+{
+ return pm_nl_get_pernet(sock_net((struct sock *)msk));
+}
+
static bool addresses_equal(const struct mptcp_addr_info *a,
const struct mptcp_addr_info *b, bool use_port)
{
@@ -206,43 +217,39 @@ select_signal_address(struct pm_nl_pernet *pernet, const struct mptcp_sock *msk)
unsigned int mptcp_pm_get_add_addr_signal_max(const struct mptcp_sock *msk)
{
- const struct pm_nl_pernet *pernet;
+ const struct pm_nl_pernet *pernet = pm_nl_get_pernet_from_msk(msk);
- pernet = net_generic(sock_net((const struct sock *)msk), pm_nl_pernet_id);
return READ_ONCE(pernet->add_addr_signal_max);
}
EXPORT_SYMBOL_GPL(mptcp_pm_get_add_addr_signal_max);
unsigned int mptcp_pm_get_add_addr_accept_max(const struct mptcp_sock *msk)
{
- struct pm_nl_pernet *pernet;
+ struct pm_nl_pernet *pernet = pm_nl_get_pernet_from_msk(msk);
- pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
return READ_ONCE(pernet->add_addr_accept_max);
}
EXPORT_SYMBOL_GPL(mptcp_pm_get_add_addr_accept_max);
unsigned int mptcp_pm_get_subflows_max(const struct mptcp_sock *msk)
{
- struct pm_nl_pernet *pernet;
+ struct pm_nl_pernet *pernet = pm_nl_get_pernet_from_msk(msk);
- pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
return READ_ONCE(pernet->subflows_max);
}
EXPORT_SYMBOL_GPL(mptcp_pm_get_subflows_max);
unsigned int mptcp_pm_get_local_addr_max(const struct mptcp_sock *msk)
{
- struct pm_nl_pernet *pernet;
+ struct pm_nl_pernet *pernet = pm_nl_get_pernet_from_msk(msk);
- pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
return READ_ONCE(pernet->local_addr_max);
}
EXPORT_SYMBOL_GPL(mptcp_pm_get_local_addr_max);
bool mptcp_pm_nl_check_work_pending(struct mptcp_sock *msk)
{
- struct pm_nl_pernet *pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
+ struct pm_nl_pernet *pernet = pm_nl_get_pernet_from_msk(msk);
if (msk->pm.subflows == mptcp_pm_get_subflows_max(msk) ||
(find_next_and_bit(pernet->id_bitmap, msk->pm.id_avail_bitmap,
@@ -508,7 +515,7 @@ static void mptcp_pm_create_subflow_or_signal_addr(struct mptcp_sock *msk)
struct pm_nl_pernet *pernet;
unsigned int subflows_max;
- pernet = net_generic(sock_net(sk), pm_nl_pernet_id);
+ pernet = pm_nl_get_pernet(sock_net(sk));
add_addr_signal_max = mptcp_pm_get_add_addr_signal_max(msk);
local_addr_max = mptcp_pm_get_local_addr_max(msk);
@@ -604,7 +611,7 @@ static unsigned int fill_local_addresses_vec(struct mptcp_sock *msk,
unsigned int subflows_max;
int i = 0;
- pernet = net_generic(sock_net(sk), pm_nl_pernet_id);
+ pernet = pm_nl_get_pernet_from_msk(msk);
subflows_max = mptcp_pm_get_subflows_max(msk);
rcu_read_lock();
@@ -1023,7 +1030,7 @@ int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
if (addresses_equal(&msk_local, &skc_local, false))
return 0;
- pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
+ pernet = pm_nl_get_pernet_from_msk(msk);
rcu_read_lock();
list_for_each_entry_rcu(entry, &pernet->local_addr_list, list) {
@@ -1214,7 +1221,7 @@ static int mptcp_pm_parse_addr(struct nlattr *attr, struct genl_info *info,
static struct pm_nl_pernet *genl_info_pm_nl(struct genl_info *info)
{
- return net_generic(genl_info_net(info), pm_nl_pernet_id);
+ return pm_nl_get_pernet(genl_info_net(info));
}
static int mptcp_nl_add_subflow_or_signal_addr(struct net *net)
@@ -1308,7 +1315,7 @@ int mptcp_pm_get_flags_and_ifindex_by_id(struct net *net, unsigned int id,
if (id) {
rcu_read_lock();
- entry = __lookup_addr_by_id(net_generic(net, pm_nl_pernet_id), id);
+ entry = __lookup_addr_by_id(pm_nl_get_pernet(net), id);
if (entry) {
*flags = entry->flags;
*ifindex = entry->ifindex;
@@ -1655,7 +1662,7 @@ static int mptcp_nl_cmd_dump_addrs(struct sk_buff *msg,
void *hdr;
int i;
- pernet = net_generic(net, pm_nl_pernet_id);
+ pernet = pm_nl_get_pernet(net);
spin_lock_bh(&pernet->lock);
for (i = id; i < MPTCP_PM_MAX_ADDR_ID + 1; i++) {
@@ -2167,7 +2174,7 @@ static struct genl_family mptcp_genl_family __ro_after_init = {
static int __net_init pm_nl_init_net(struct net *net)
{
- struct pm_nl_pernet *pernet = net_generic(net, pm_nl_pernet_id);
+ struct pm_nl_pernet *pernet = pm_nl_get_pernet(net);
INIT_LIST_HEAD_RCU(&pernet->local_addr_list);
@@ -2189,7 +2196,7 @@ static void __net_exit pm_nl_exit_net(struct list_head *net_list)
struct net *net;
list_for_each_entry(net, net_list, exit_list) {
- struct pm_nl_pernet *pernet = net_generic(net, pm_nl_pernet_id);
+ struct pm_nl_pernet *pernet = pm_nl_get_pernet(net);
/* net is removed from namespace list, can't race with
* other modifiers, also netns core already waited for a
--
2.35.1
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