aboutsummaryrefslogtreecommitdiff
path: root/net/phonet/pn_netlink.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/phonet/pn_netlink.c')
-rw-r--r--net/phonet/pn_netlink.c183
1 files changed, 161 insertions, 22 deletions
diff --git a/net/phonet/pn_netlink.c b/net/phonet/pn_netlink.c
index cec4e595168..b64151ade6b 100644
--- a/net/phonet/pn_netlink.c
+++ b/net/phonet/pn_netlink.c
@@ -5,8 +5,8 @@
*
* Copyright (C) 2008 Nokia Corporation.
*
- * Contact: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
- * Original author: Sakari Ailus <sakari.ailus@nokia.com>
+ * Authors: Sakari Ailus <sakari.ailus@nokia.com>
+ * Remi Denis-Courmont
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -26,13 +26,16 @@
#include <linux/kernel.h>
#include <linux/netlink.h>
#include <linux/phonet.h>
+#include <linux/slab.h>
#include <net/sock.h>
#include <net/phonet/pn_dev.h>
+/* Device address handling */
+
static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
- u32 pid, u32 seq, int event);
+ u32 portid, u32 seq, int event);
-static void rtmsg_notify(int event, struct net_device *dev, u8 addr)
+void phonet_address_notify(int event, struct net_device *dev, u8 addr)
{
struct sk_buff *skb;
int err = -ENOBUFS;
@@ -51,15 +54,14 @@ static void rtmsg_notify(int event, struct net_device *dev, u8 addr)
RTNLGRP_PHONET_IFADDR, NULL, GFP_KERNEL);
return;
errout:
- if (err < 0)
- rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
+ rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err);
}
static const struct nla_policy ifa_phonet_policy[IFA_MAX+1] = {
[IFA_LOCAL] = { .type = NLA_U8 },
};
-static int addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *attr)
+static int addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct nlattr *tb[IFA_MAX+1];
@@ -68,7 +70,10 @@ static int addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *attr)
int err;
u8 pnaddr;
- if (!capable(CAP_SYS_ADMIN))
+ if (!netlink_capable(skb, CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (!netlink_capable(skb, CAP_SYS_ADMIN))
return -EPERM;
ASSERT_RTNL();
@@ -94,17 +99,17 @@ static int addr_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *attr)
else
err = phonet_address_del(dev, pnaddr);
if (!err)
- rtmsg_notify(nlh->nlmsg_type, dev, pnaddr);
+ phonet_address_notify(nlh->nlmsg_type, dev, pnaddr);
return err;
}
static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
- u32 pid, u32 seq, int event)
+ u32 portid, u32 seq, int event)
{
struct ifaddrmsg *ifm;
struct nlmsghdr *nlh;
- nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), 0);
+ nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), 0);
if (nlh == NULL)
return -EMSGSIZE;
@@ -114,7 +119,8 @@ static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr,
ifm->ifa_flags = IFA_F_PERMANENT;
ifm->ifa_scope = RT_SCOPE_LINK;
ifm->ifa_index = dev->ifindex;
- NLA_PUT_U8(skb, IFA_LOCAL, addr);
+ if (nla_put_u8(skb, IFA_LOCAL, addr))
+ goto nla_put_failure;
return nlmsg_end(skb, nlh);
nla_put_failure:
@@ -130,8 +136,8 @@ static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
int addr_idx = 0, addr_start_idx = cb->args[1];
pndevs = phonet_device_list(sock_net(skb->sk));
- spin_lock_bh(&pndevs->lock);
- list_for_each_entry(pnd, &pndevs->list, list) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(pnd, &pndevs->list, list) {
u8 addr;
if (dev_idx > dev_start_idx)
@@ -140,34 +146,167 @@ static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
continue;
addr_idx = 0;
- for (addr = find_first_bit(pnd->addrs, 64); addr < 64;
- addr = find_next_bit(pnd->addrs, 64, 1+addr)) {
+ for_each_set_bit(addr, pnd->addrs, 64) {
if (addr_idx++ < addr_start_idx)
continue;
if (fill_addr(skb, pnd->netdev, addr << 2,
- NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, RTM_NEWADDR))
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, RTM_NEWADDR) < 0)
goto out;
}
}
out:
- spin_unlock_bh(&pndevs->lock);
+ rcu_read_unlock();
cb->args[0] = dev_idx;
cb->args[1] = addr_idx;
return skb->len;
}
+/* Routes handling */
+
+static int fill_route(struct sk_buff *skb, struct net_device *dev, u8 dst,
+ u32 portid, u32 seq, int event)
+{
+ struct rtmsg *rtm;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, portid, seq, event, sizeof(*rtm), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ rtm = nlmsg_data(nlh);
+ rtm->rtm_family = AF_PHONET;
+ rtm->rtm_dst_len = 6;
+ rtm->rtm_src_len = 0;
+ rtm->rtm_tos = 0;
+ rtm->rtm_table = RT_TABLE_MAIN;
+ rtm->rtm_protocol = RTPROT_STATIC;
+ rtm->rtm_scope = RT_SCOPE_UNIVERSE;
+ rtm->rtm_type = RTN_UNICAST;
+ rtm->rtm_flags = 0;
+ if (nla_put_u8(skb, RTA_DST, dst) ||
+ nla_put_u32(skb, RTA_OIF, dev->ifindex))
+ goto nla_put_failure;
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+void rtm_phonet_notify(int event, struct net_device *dev, u8 dst)
+{
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+
+ skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
+ nla_total_size(1) + nla_total_size(4), GFP_KERNEL);
+ if (skb == NULL)
+ goto errout;
+ err = fill_route(skb, dev, dst, 0, 0, event);
+ if (err < 0) {
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(skb);
+ goto errout;
+ }
+ rtnl_notify(skb, dev_net(dev), 0,
+ RTNLGRP_PHONET_ROUTE, NULL, GFP_KERNEL);
+ return;
+errout:
+ rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_ROUTE, err);
+}
+
+static const struct nla_policy rtm_phonet_policy[RTA_MAX+1] = {
+ [RTA_DST] = { .type = NLA_U8 },
+ [RTA_OIF] = { .type = NLA_U32 },
+};
+
+static int route_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+ struct net *net = sock_net(skb->sk);
+ struct nlattr *tb[RTA_MAX+1];
+ struct net_device *dev;
+ struct rtmsg *rtm;
+ int err;
+ u8 dst;
+
+ if (!netlink_capable(skb, CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (!netlink_capable(skb, CAP_SYS_ADMIN))
+ return -EPERM;
+
+ ASSERT_RTNL();
+
+ err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_phonet_policy);
+ if (err < 0)
+ return err;
+
+ rtm = nlmsg_data(nlh);
+ if (rtm->rtm_table != RT_TABLE_MAIN || rtm->rtm_type != RTN_UNICAST)
+ return -EINVAL;
+ if (tb[RTA_DST] == NULL || tb[RTA_OIF] == NULL)
+ return -EINVAL;
+ dst = nla_get_u8(tb[RTA_DST]);
+ if (dst & 3) /* Phonet addresses only have 6 high-order bits */
+ return -EINVAL;
+
+ dev = __dev_get_by_index(net, nla_get_u32(tb[RTA_OIF]));
+ if (dev == NULL)
+ return -ENODEV;
+
+ if (nlh->nlmsg_type == RTM_NEWROUTE)
+ err = phonet_route_add(dev, dst);
+ else
+ err = phonet_route_del(dev, dst);
+ if (!err)
+ rtm_phonet_notify(nlh->nlmsg_type, dev, dst);
+ return err;
+}
+
+static int route_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ u8 addr, addr_idx = 0, addr_start_idx = cb->args[0];
+
+ rcu_read_lock();
+ for (addr = 0; addr < 64; addr++) {
+ struct net_device *dev;
+
+ dev = phonet_route_get_rcu(net, addr << 2);
+ if (!dev)
+ continue;
+
+ if (addr_idx++ < addr_start_idx)
+ continue;
+ if (fill_route(skb, dev, addr << 2, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, RTM_NEWROUTE))
+ goto out;
+ }
+
+out:
+ rcu_read_unlock();
+ cb->args[0] = addr_idx;
+ cb->args[1] = 0;
+
+ return skb->len;
+}
+
int __init phonet_netlink_register(void)
{
- int err = __rtnl_register(PF_PHONET, RTM_NEWADDR, addr_doit, NULL);
+ int err = __rtnl_register(PF_PHONET, RTM_NEWADDR, addr_doit,
+ NULL, NULL);
if (err)
return err;
/* Further __rtnl_register() cannot fail */
- __rtnl_register(PF_PHONET, RTM_DELADDR, addr_doit, NULL);
- __rtnl_register(PF_PHONET, RTM_GETADDR, NULL, getaddr_dumpit);
+ __rtnl_register(PF_PHONET, RTM_DELADDR, addr_doit, NULL, NULL);
+ __rtnl_register(PF_PHONET, RTM_GETADDR, NULL, getaddr_dumpit, NULL);
+ __rtnl_register(PF_PHONET, RTM_NEWROUTE, route_doit, NULL, NULL);
+ __rtnl_register(PF_PHONET, RTM_DELROUTE, route_doit, NULL, NULL);
+ __rtnl_register(PF_PHONET, RTM_GETROUTE, NULL, route_dumpit, NULL);
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 09:49:23 +0000