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@suug.ch>
Cc: Jiri Pirko <jpirko@redhat.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Sergey Lapin <slapin@ossfans.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Cc: Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Reviewed-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index 5350eea..89853c3 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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;