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Date: Thu, 28 Jun 2012 15:57:45 +0200
From: Thomas Graf <tgraf@...g.ch>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, Jiri Pirko <jpirko@...hat.com>,
Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
Sergey Lapin <slapin@...fans.org>,
Johannes Berg <johannes@...solutions.net>,
Lauro Ramos Venancio <lauro.venancio@...nbossa.org>,
Aloisio Almeida Jr <aloisio.almeida@...nbossa.org>,
Samuel Ortiz <sameo@...ux.intel.com>
Subject: [PATCH] net: Use NLMSG_DEFAULT_SIZE in combination with nlmsg_new()
Using NLMSG_GOODSIZE results in multiple pages being used as
nlmsg_new() will automatically add the size of the netlink
header to the payload thus exceeding the page limit.
NLMSG_DEFAULT_SIZE takes this into account.
Signed-off-by: Thomas Graf <tgraf@...g.ch>
Cc: Jiri Pirko <jpirko@...hat.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
Cc: Sergey Lapin <slapin@...fans.org>
Cc: Johannes Berg <johannes@...solutions.net>
Cc: Lauro Ramos Venancio <lauro.venancio@...nbossa.org>
Cc: Aloisio Almeida Jr <aloisio.almeida@...nbossa.org>
Cc: Samuel Ortiz <sameo@...ux.intel.com>
---
drivers/net/team/team.c | 8 ++++----
drivers/net/wireless/mac80211_hwsim.c | 2 +-
include/net/genetlink.h | 2 ++
net/ieee802154/netlink.c | 4 ++--
net/ieee802154/nl-mac.c | 2 +-
net/ieee802154/nl-phy.c | 2 +-
net/l2tp/l2tp_netlink.c | 6 +++---
net/nfc/netlink.c | 18 +++++++++---------
net/wireless/nl80211.c | 26 +++++++++++++-------------
9 files changed, 36 insertions(+), 34 deletions(-)
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 5350eea..89853c3 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -1476,7 +1476,7 @@ static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
void *hdr;
int err;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -1538,7 +1538,7 @@ static int team_nl_send_generic(struct genl_info *info, struct team *team,
struct sk_buff *skb;
int err;
- skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!skb)
return -ENOMEM;
@@ -1648,7 +1648,7 @@ static int __send_and_alloc_skb(struct sk_buff **pskb,
if (err)
return err;
}
- *pskb = genlmsg_new(NLMSG_DEFAULT_SIZE - GENL_HDRLEN, GFP_KERNEL);
+ *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!*pskb)
return -ENOMEM;
return 0;
@@ -2016,7 +2016,7 @@ static int team_nl_send_event_port_list_get(struct team *team)
int err;
struct net *net = dev_net(team->dev);
- skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!skb)
return -ENOMEM;
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index a0b7cfd..a9ba3f7 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -571,7 +571,7 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
skb_dequeue(&data->pending);
}
- skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (skb == NULL)
goto nla_put_failure;
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index ccb6888..48905cd 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -5,6 +5,8 @@
#include <net/netlink.h>
#include <net/net_namespace.h>
+#define GENLMSG_DEFAULT_SIZE (NLMSG_DEFAULT_SIZE - GENL_HDRLEN)
+
/**
* struct genl_multicast_group - generic netlink multicast group
* @name: name of the multicast group, names are per-family
diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index c8097ae..97351e1 100644
--- a/net/ieee802154/netlink.c
+++ b/net/ieee802154/netlink.c
@@ -44,7 +44,7 @@ struct genl_family nl802154_family = {
struct sk_buff *ieee802154_nl_create(int flags, u8 req)
{
void *hdr;
- struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
unsigned long f;
if (!msg)
@@ -80,7 +80,7 @@ struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
int flags, u8 req)
{
void *hdr;
- struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return NULL;
diff --git a/net/ieee802154/nl-mac.c b/net/ieee802154/nl-mac.c
index ca92587..1e99171 100644
--- a/net/ieee802154/nl-mac.c
+++ b/net/ieee802154/nl-mac.c
@@ -530,7 +530,7 @@ static int ieee802154_list_iface(struct sk_buff *skb,
if (!dev)
return -ENODEV;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_dev;
diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
index eed2916..d54be34 100644
--- a/net/ieee802154/nl-phy.c
+++ b/net/ieee802154/nl-phy.c
@@ -101,7 +101,7 @@ static int ieee802154_list_phy(struct sk_buff *skb,
if (!phy)
return -ENODEV;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_dev;
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index ddc553e..d71cd92 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -72,7 +72,7 @@ static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
void *hdr;
int ret = -ENOBUFS;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
goto out;
@@ -353,7 +353,7 @@ static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info)
goto out;
}
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
goto out;
@@ -699,7 +699,7 @@ static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info)
goto out;
}
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
goto out;
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 03c31db..f4f07f9 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -167,7 +167,7 @@ int nfc_genl_targets_found(struct nfc_dev *dev)
dev->genl_data.poll_req_pid = 0;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return -ENOMEM;
@@ -195,7 +195,7 @@ int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -226,7 +226,7 @@ int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -258,7 +258,7 @@ int nfc_genl_tm_deactivated(struct nfc_dev *dev)
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -288,7 +288,7 @@ int nfc_genl_device_added(struct nfc_dev *dev)
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -321,7 +321,7 @@ int nfc_genl_device_removed(struct nfc_dev *dev)
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -434,7 +434,7 @@ int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
pr_debug("DEP link is up\n");
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return -ENOMEM;
@@ -473,7 +473,7 @@ int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
pr_debug("DEP link is down\n");
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return -ENOMEM;
@@ -514,7 +514,7 @@ static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
if (!dev)
return -ENODEV;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
rc = -ENOMEM;
goto out_putdev;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7ae54b8..cbdc0fd 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7210,7 +7210,7 @@ void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
{
struct sk_buff *msg;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
@@ -7286,7 +7286,7 @@ void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
{
struct sk_buff *msg;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
@@ -7502,7 +7502,7 @@ void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -7542,7 +7542,7 @@ void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -7580,7 +7580,7 @@ void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
@@ -7842,7 +7842,7 @@ void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
{
struct sk_buff *msg;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -7863,7 +7863,7 @@ void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -8026,7 +8026,7 @@ nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
struct nlattr *pinfoattr;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -8069,7 +8069,7 @@ void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
struct nlattr *rekey_attr;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -8113,7 +8113,7 @@ void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
struct nlattr *attr;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -8157,7 +8157,7 @@ void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -8192,7 +8192,7 @@ nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
struct nlattr *pinfoattr;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
@@ -8236,7 +8236,7 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
void *hdr;
int err;
- msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;
--
1.7.7.6
--
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