20 files changed, 117 insertions, 51 deletions

diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
index 5a37eadb4e5..ba2c611154a 100644
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -496,9 +496,12 @@ static void crypto_netlink_rcv(struct sk_buff *skb)
 
 static int __init crypto_user_init(void)
 {
+        struct netlink_kernel_cfg cfg = {
+                .input  = crypto_netlink_rcv,
+        };
+
         crypto_nlsk = netlink_kernel_create(&init_net, NETLINK_CRYPTO,
-                                            0, crypto_netlink_rcv,
-                                            NULL, THIS_MODULE);
+                                            THIS_MODULE, &cfg);
         if (!crypto_nlsk)
                 return -ENOMEM;
 
diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c
index 34e0e9e4d91..116cf8d0283 100644
--- a/drivers/connector/connector.c
+++ b/drivers/connector/connector.c
@@ -251,15 +251,20 @@ static const struct file_operations cn_file_ops = {
         .release = single_release
 };
 
+static struct cn_dev cdev = {
+        .input   = cn_rx_skb,
+};
+
 static int __devinit cn_init(void)
 {
         struct cn_dev *dev = &cdev;
-
-        dev->input = cn_rx_skb;
+        struct netlink_kernel_cfg cfg = {
+                .groups = CN_NETLINK_USERS + 0xf,
+                .input  = dev->input,
+        };
 
         dev->nls = netlink_kernel_create(&init_net, NETLINK_CONNECTOR,
-                                         CN_NETLINK_USERS + 0xf,
-                                         dev->input, NULL, THIS_MODULE);
+                                         THIS_MODULE, &cfg);
         if (!dev->nls)
                 return -EIO;
 
diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
index 1e691dca182..3ae2bfd3101 100644
--- a/drivers/infiniband/core/netlink.c
+++ b/drivers/infiniband/core/netlink.c
@@ -173,8 +173,11 @@ static void ibnl_rcv(struct sk_buff *skb)
 
 int __init ibnl_init(void)
 {
-        nls = netlink_kernel_create(&init_net, NETLINK_RDMA, 0, ibnl_rcv,
-                                    NULL, THIS_MODULE);
+        struct netlink_kernel_cfg cfg = {
+                .input  = ibnl_rcv,
+        };
+
+        nls = netlink_kernel_create(&init_net, NETLINK_RDMA, THIS_MODULE, &cfg);
         if (!nls) {
                 pr_warn("Failed to create netlink socket\n");
                 return -ENOMEM;
diff --git a/drivers/scsi/scsi_netlink.c b/drivers/scsi/scsi_netlink.c
index c77628afbf9..8818dd681c1 100644
--- a/drivers/scsi/scsi_netlink.c
+++ b/drivers/scsi/scsi_netlink.c
@@ -486,6 +486,10 @@ void
 scsi_netlink_init(void)
 {
         int error;
+        struct netlink_kernel_cfg cfg = {
+                .input  = scsi_nl_rcv_msg,
+                .groups = SCSI_NL_GRP_CNT,
+        };
 
         INIT_LIST_HEAD(&scsi_nl_drivers);
 
@@ -497,8 +501,7 @@ scsi_netlink_init(void)
         }
 
         scsi_nl_sock = netlink_kernel_create(&init_net, NETLINK_SCSITRANSPORT,
-                                SCSI_NL_GRP_CNT, scsi_nl_rcv_msg, NULL,
-                                THIS_MODULE);
+                                             THIS_MODULE, &cfg);
         if (!scsi_nl_sock) {
                 printk(KERN_ERR "%s: register of receive handler failed\n",
                                 __func__);
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 1cf640e575d..6042954d8f3 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -2936,7 +2936,10 @@ EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
 static __init int iscsi_transport_init(void)
 {
         int err;
-
+        struct netlink_kernel_cfg cfg = {
+                .groups = 1,
+                .input  = iscsi_if_rx,
+        };
         printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
                 ISCSI_TRANSPORT_VERSION);
 
@@ -2966,8 +2969,8 @@ static __init int iscsi_transport_init(void)
         if (err)
                 goto unregister_conn_class;
 
-        nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx,
-                                    NULL, THIS_MODULE);
+        nls = netlink_kernel_create(&init_net, NETLINK_ISCSI,
+                                    THIS_MODULE, &cfg);
         if (!nls) {
                 err = -ENOBUFS;
                 goto unregister_session_class;
diff --git a/drivers/staging/gdm72xx/netlink_k.c b/drivers/staging/gdm72xx/netlink_k.c
index 2489bb5597c..87c3a07ed80 100644
--- a/drivers/staging/gdm72xx/netlink_k.c
+++ b/drivers/staging/gdm72xx/netlink_k.c
@@ -88,13 +88,15 @@ struct sock *netlink_init(int unit, void (*cb)(struct net_device *dev, u16 type,
                                                 void *msg, int len))
 {
         struct sock *sock;
+        struct netlink_kernel_cfg cfg = {
+                .input  = netlink_rcv,
+        };
 
 #if !defined(DEFINE_MUTEX)
         init_MUTEX(&netlink_mutex);
 #endif
 
-        sock = netlink_kernel_create(&init_net, unit, 0, netlink_rcv, NULL,
-                                        THIS_MODULE);
+        sock = netlink_kernel_create(&init_net, unit, THIS_MODULE, &cfg);
 
         if (sock)
                 rcv_cb = cb;
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index ed33f0901bc..6085e4919cb 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -174,11 +174,16 @@ struct netlink_skb_parms {
 extern void netlink_table_grab(void);
 extern void netlink_table_ungrab(void);
 
-extern struct sock *netlink_kernel_create(struct net *net,
-                                          int unit,unsigned int groups,
-                                          void (*input)(struct sk_buff *skb),
-                                          struct mutex *cb_mutex,
-                                          struct module *module);
+/* optional Netlink kernel configuration parameters */
+struct netlink_kernel_cfg {
+        unsigned int    groups;
+        void            (*input)(struct sk_buff *skb);
+        struct mutex    *cb_mutex;
+};
+
+extern struct sock *netlink_kernel_create(struct net *net, int unit,
+                                          struct module *module,
+                                          struct netlink_kernel_cfg *cfg);
 extern void netlink_kernel_release(struct sock *sk);
 extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups);
 extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);
diff --git a/kernel/audit.c b/kernel/audit.c
index 30b252a1fb6..4a3f28d2ca6 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -962,14 +962,17 @@ static void audit_receive(struct sk_buff  *skb)
 static int __init audit_init(void)
 {
         int i;
+        struct netlink_kernel_cfg cfg = {
+                .input  = audit_receive,
+        };
 
         if (audit_initialized == AUDIT_DISABLED)
                 return 0;
 
         printk(KERN_INFO "audit: initializing netlink socket (%s)\n",
                audit_default ? "enabled" : "disabled");
-        audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, 0,
-                                           audit_receive, NULL, THIS_MODULE);
+        audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT,
+                                           THIS_MODULE, &cfg);
         if (!audit_sock)
                 audit_panic("cannot initialize netlink socket");
         else
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 1a91efa6d12..0401d2916d9 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -373,13 +373,16 @@ EXPORT_SYMBOL_GPL(add_uevent_var);
 static int uevent_net_init(struct net *net)
 {
         struct uevent_sock *ue_sk;
+        struct netlink_kernel_cfg cfg = {
+                .groups = 1,
+        };
 
         ue_sk = kzalloc(sizeof(*ue_sk), GFP_KERNEL);
         if (!ue_sk)
                 return -ENOMEM;
 
         ue_sk->sk = netlink_kernel_create(net, NETLINK_KOBJECT_UEVENT,
-                                          1, NULL, NULL, THIS_MODULE);
+                                          THIS_MODULE, &cfg);
         if (!ue_sk->sk) {
                 printk(KERN_ERR
                        "kobject_uevent: unable to create netlink socket!\n");
diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index 1bd173218f7..374bdcd7703 100644
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -282,6 +282,9 @@ static int __init ebt_ulog_init(void)
 {
         int ret;
         int i;
+        struct netlink_kernel_cfg cfg = {
+                .groups = EBT_ULOG_MAXNLGROUPS,
+        };
 
         if (nlbufsiz >= 128*1024) {
                 pr_warning("Netlink buffer has to be <= 128kB,"
@@ -296,8 +299,7 @@ static int __init ebt_ulog_init(void)
         }
 
         ebtulognl = netlink_kernel_create(&init_net, NETLINK_NFLOG,
-                                          EBT_ULOG_MAXNLGROUPS, NULL, NULL,
-                                          THIS_MODULE);
+                                          THIS_MODULE, &cfg);
         if (!ebtulognl)
                 ret = -ENOMEM;
         else if ((ret = xt_register_target(&ebt_ulog_tg_reg)) != 0)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index bc8a1cdaac9..2b325c340b4 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2353,8 +2353,13 @@ static struct notifier_block rtnetlink_dev_notifier = {
 static int __net_init rtnetlink_net_init(struct net *net)
 {
         struct sock *sk;
-        sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
-                                   rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
+        struct netlink_kernel_cfg cfg = {
+                .groups         = RTNLGRP_MAX,
+                .input          = rtnetlink_rcv,
+                .cb_mutex       = &rtnl_mutex,
+        };
+
+        sk = netlink_kernel_create(net, NETLINK_ROUTE, THIS_MODULE, &cfg);
         if (!sk)
                 return -ENOMEM;
         net->rtnl = sk;
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index ff2967acbfa..07a29eb34a4 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -171,8 +171,12 @@ EXPORT_SYMBOL_GPL(sock_diag_nlsk);
 
 static int __init sock_diag_init(void)
 {
-        sock_diag_nlsk = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG, 0,
-                                        sock_diag_rcv, NULL, THIS_MODULE);
+        struct netlink_kernel_cfg cfg = {
+                .input  = sock_diag_rcv,
+        };
+
+        sock_diag_nlsk = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG,
+                                               THIS_MODULE, &cfg);
         return sock_diag_nlsk == NULL ? -ENOMEM : 0;
 }
 
diff --git a/net/decnet/netfilter/dn_rtmsg.c b/net/decnet/netfilter/dn_rtmsg.c
index b8f7f5b8c35..11db0ecf342 100644
--- a/net/decnet/netfilter/dn_rtmsg.c
+++ b/net/decnet/netfilter/dn_rtmsg.c
@@ -125,11 +125,13 @@ static struct nf_hook_ops dnrmg_ops __read_mostly = {
 static int __init dn_rtmsg_init(void)
 {
         int rv = 0;
+        struct netlink_kernel_cfg cfg = {
+                .groups = DNRNG_NLGRP_MAX,
+                .input  = dnrmg_receive_user_skb,
+        };
 
         dnrmg = netlink_kernel_create(&init_net,
-                                      NETLINK_DNRTMSG, DNRNG_NLGRP_MAX,
-                                      dnrmg_receive_user_skb,
-                                      NULL, THIS_MODULE);
+                                      NETLINK_DNRTMSG, THIS_MODULE, &cfg);
         if (dnrmg == NULL) {
                 printk(KERN_ERR "dn_rtmsg: Cannot create netlink socket");
                 return -ENOMEM;
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index ae528d1b293..3e11ea225da 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -976,8 +976,11 @@ static void nl_fib_input(struct sk_buff *skb)
 static int __net_init nl_fib_lookup_init(struct net *net)
 {
         struct sock *sk;
-        sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0,
-                                   nl_fib_input, NULL, THIS_MODULE);
+        struct netlink_kernel_cfg cfg = {
+                .input  = nl_fib_input,
+        };
+
+        sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, THIS_MODULE, &cfg);
         if (sk == NULL)
                 return -EAFNOSUPPORT;
         net->ipv4.fibnl = sk;
diff --git a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c
index 99b3f53f16a..1109f7f6c25 100644
--- a/net/ipv4/netfilter/ipt_ULOG.c
+++ b/net/ipv4/netfilter/ipt_ULOG.c
@@ -381,6 +381,9 @@ static struct nf_logger ipt_ulog_logger __read_mostly = {
 static int __init ulog_tg_init(void)
 {
         int ret, i;
+        struct netlink_kernel_cfg cfg = {
+                .groups = ULOG_MAXNLGROUPS,
+        };
 
         pr_debug("init module\n");
 
@@ -393,9 +396,8 @@ static int __init ulog_tg_init(void)
         for (i = 0; i < ULOG_MAXNLGROUPS; i++)
                 setup_timer(&ulog_buffers[i].timer, ulog_timer, i);
 
-        nflognl = netlink_kernel_create(&init_net,
-                                        NETLINK_NFLOG, ULOG_MAXNLGROUPS, NULL,
-                                        NULL, THIS_MODULE);
+        nflognl = netlink_kernel_create(&init_net, NETLINK_NFLOG,
+                                        THIS_MODULE, &cfg);
         if (!nflognl)
                 return -ENOMEM;
 
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 3e797d1fcb9..700e4616a09 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -203,9 +203,12 @@ static void nfnetlink_rcv(struct sk_buff *skb)
 static int __net_init nfnetlink_net_init(struct net *net)
 {
         struct sock *nfnl;
+        struct netlink_kernel_cfg cfg = {
+                .groups = NFNLGRP_MAX,
+                .input  = nfnetlink_rcv,
+        };
 
-        nfnl = netlink_kernel_create(net, NETLINK_NETFILTER, NFNLGRP_MAX,
-                                     nfnetlink_rcv, NULL, THIS_MODULE);
+        nfnl = netlink_kernel_create(net, NETLINK_NETFILTER, THIS_MODULE, &cfg);
         if (!nfnl)
                 return -ENOMEM;
         net->nfnl_stash = nfnl;
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index b3025a603d5..43a124feaad 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1503,14 +1503,16 @@ static void netlink_data_ready(struct sock *sk, int len)
  */
 
 struct sock *
-netlink_kernel_create(struct net *net, int unit, unsigned int groups,
-                      void (*input)(struct sk_buff *skb),
-                      struct mutex *cb_mutex, struct module *module)
+netlink_kernel_create(struct net *net, int unit,
+                      struct module *module,
+                      struct netlink_kernel_cfg *cfg)
 {
         struct socket *sock;
         struct sock *sk;
         struct netlink_sock *nlk;
         struct listeners *listeners = NULL;
+        struct mutex *cb_mutex = cfg ? cfg->cb_mutex : NULL;
+        unsigned int groups;
 
         BUG_ON(!nl_table);
 
@@ -1532,16 +1534,18 @@ netlink_kernel_create(struct net *net, int unit, unsigned int groups,
         sk = sock->sk;
         sk_change_net(sk, net);
 
-        if (groups < 32)
+        if (!cfg || cfg->groups < 32)
                 groups = 32;
+        else
+                groups = cfg->groups;
 
         listeners = kzalloc(sizeof(*listeners) + NLGRPSZ(groups), GFP_KERNEL);
         if (!listeners)
                 goto out_sock_release;
 
         sk->sk_data_ready = netlink_data_ready;
-        if (input)
-                nlk_sk(sk)->netlink_rcv = input;
+        if (cfg && cfg->input)
+                nlk_sk(sk)->netlink_rcv = cfg->input;
 
         if (netlink_insert(sk, net, 0))
                 goto out_sock_release;
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 2cc7c1ee769..32761b53015 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -915,10 +915,14 @@ static struct genl_multicast_group notify_grp = {
 
 static int __net_init genl_pernet_init(struct net *net)
 {
+        struct netlink_kernel_cfg cfg = {
+                .input          = genl_rcv,
+                .cb_mutex       = &genl_mutex,
+        };
+
         /* we'll bump the group number right afterwards */
-        net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC, 0,
-                                               genl_rcv, &genl_mutex,
-                                               THIS_MODULE);
+        net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC,
+                                               THIS_MODULE, &cfg);
 
         if (!net->genl_sock && net_eq(net, &init_net))
                 panic("GENL: Cannot initialize generic netlink\n");
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 540762726aa..e75d8e47f35 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -2959,9 +2959,12 @@ static struct xfrm_mgr netlink_mgr = {
 static int __net_init xfrm_user_net_init(struct net *net)
 {
         struct sock *nlsk;
+        struct netlink_kernel_cfg cfg = {
+                .groups = XFRMNLGRP_MAX,
+                .input  = xfrm_netlink_rcv,
+        };
 
-        nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
-                                     xfrm_netlink_rcv, NULL, THIS_MODULE);
+        nlsk = netlink_kernel_create(net, NETLINK_XFRM, THIS_MODULE, &cfg);
         if (nlsk == NULL)
                 return -ENOMEM;
         net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
diff --git a/security/selinux/netlink.c b/security/selinux/netlink.c
index 8a23a35b9c5..8a77725423e 100644
--- a/security/selinux/netlink.c
+++ b/security/selinux/netlink.c
@@ -111,8 +111,12 @@ void selnl_notify_policyload(u32 seqno)
 
 static int __init selnl_init(void)
 {
+        struct netlink_kernel_cfg cfg = {
+                .groups = SELNLGRP_MAX,
+        };
+
         selnl = netlink_kernel_create(&init_net, NETLINK_SELINUX,
-                                      SELNLGRP_MAX, NULL, NULL, THIS_MODULE);
+                                      THIS_MODULE, &cfg);
         if (selnl == NULL)
                 panic("SELinux:  Cannot create netlink socket.");
         netlink_set_nonroot(NETLINK_SELINUX, NL_NONROOT_RECV);