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Release 4.11 net/phonet/pn_netlink.c

Directory: net/phonet
/*
 * File: pn_netlink.c
 *
 * Phonet netlink interface
 *
 * Copyright (C) 2008 Nokia Corporation.
 *
 * 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
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#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 portid, u32 seq, int event);


void phonet_address_notify(int event, struct net_device *dev, u8 addr) { struct sk_buff *skb; int err = -ENOBUFS; skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) + nla_total_size(1), GFP_KERNEL); if (skb == NULL) goto errout; err = fill_addr(skb, dev, addr, 0, 0, event); if (err < 0) { WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout; } rtnl_notify(skb, dev_net(dev), 0, RTNLGRP_PHONET_IFADDR, NULL, GFP_KERNEL); return; errout: rtnl_set_sk_err(dev_net(dev), RTNLGRP_PHONET_IFADDR, err); }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont13099.24%266.67%
Pablo Neira Ayuso10.76%133.33%
Total131100.00%3100.00%

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) { struct net *net = sock_net(skb->sk); struct nlattr *tb[IFA_MAX+1]; struct net_device *dev; struct ifaddrmsg *ifm; int err; u8 pnaddr; 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(*ifm), tb, IFA_MAX, ifa_phonet_policy); if (err < 0) return err; ifm = nlmsg_data(nlh); if (tb[IFA_LOCAL] == NULL) return -EINVAL; pnaddr = nla_get_u8(tb[IFA_LOCAL]); if (pnaddr & 3) /* Phonet addresses only have 6 high-order bits */ return -EINVAL; dev = __dev_get_by_index(net, ifm->ifa_index); if (dev == NULL) return -ENODEV; if (nlh->nlmsg_type == RTM_NEWADDR) err = phonet_address_add(dev, pnaddr); else err = phonet_address_del(dev, pnaddr); if (!err) phonet_address_notify(nlh->nlmsg_type, dev, pnaddr); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont20492.31%360.00%
Eric W. Biedermann177.69%240.00%
Total221100.00%5100.00%


static int fill_addr(struct sk_buff *skb, struct net_device *dev, u8 addr, u32 portid, u32 seq, int event) { struct ifaddrmsg *ifm; struct nlmsghdr *nlh; nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), 0); if (nlh == NULL) return -EMSGSIZE; ifm = nlmsg_data(nlh); ifm->ifa_family = AF_PHONET; ifm->ifa_prefixlen = 0; ifm->ifa_flags = IFA_F_PERMANENT; ifm->ifa_scope = RT_SCOPE_LINK; ifm->ifa_index = dev->ifindex; if (nla_put_u8(skb, IFA_LOCAL, addr)) goto nla_put_failure; nlmsg_end(skb, nlh); return 0; nla_put_failure: nlmsg_cancel(skb, nlh); return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont13391.72%240.00%
David S. Miller74.83%120.00%
Johannes Berg32.07%120.00%
Eric W. Biedermann21.38%120.00%
Total145100.00%5100.00%


static int getaddr_dumpit(struct sk_buff *skb, struct netlink_callback *cb) { struct phonet_device_list *pndevs; struct phonet_device *pnd; int dev_idx = 0, dev_start_idx = cb->args[0]; int addr_idx = 0, addr_start_idx = cb->args[1]; pndevs = phonet_device_list(sock_net(skb->sk)); rcu_read_lock(); list_for_each_entry_rcu(pnd, &pndevs->list, list) { u8 addr; if (dev_idx > dev_start_idx) addr_start_idx = 0; if (dev_idx++ < dev_start_idx) continue; addr_idx = 0; 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).portid, cb->nlh->nlmsg_seq, RTM_NEWADDR) < 0) goto out; } } out: rcu_read_unlock(); cb->args[0] = dev_idx; cb->args[1] = addr_idx; return skb->len; }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont18397.86%571.43%
Akinobu Mita31.60%114.29%
Eric W. Biedermann10.53%114.29%
Total187100.00%7100.00%

/* 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; nlmsg_end(skb, nlh); return 0; nla_put_failure: nlmsg_cancel(skb, nlh); return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont16492.13%350.00%
David S. Miller95.06%116.67%
Johannes Berg31.69%116.67%
Eric W. Biedermann21.12%116.67%
Total178100.00%6100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont136100.00%2100.00%
Total136100.00%2100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont23393.20%133.33%
Eric W. Biedermann176.80%266.67%
Total250100.00%3100.00%


static int route_dumpit(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); u8 addr; rcu_read_lock(); for (addr = cb->args[0]; addr < 64; addr++) { struct net_device *dev = phonet_route_get_rcu(net, addr << 2); if (!dev) continue; if (fill_route(skb, dev, addr << 2, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, RTM_NEWROUTE) < 0) goto out; } out: rcu_read_unlock(); cb->args[0] = addr; return skb->len; }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont10985.16%125.00%
Johannes Berg118.59%125.00%
Eric Dumazet75.47%125.00%
Eric W. Biedermann10.78%125.00%
Total128100.00%4100.00%


int __init phonet_netlink_register(void) { 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, 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; }

Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont8888.00%375.00%
Greg Rose1212.00%125.00%
Total100100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Rémi Denis-Courmont148393.68%1047.62%
Eric W. Biedermann412.59%314.29%
Johannes Berg171.07%29.52%
David S. Miller161.01%14.76%
Greg Rose120.76%14.76%
Eric Dumazet70.44%14.76%
Akinobu Mita30.19%14.76%
Tejun Heo30.19%14.76%
Pablo Neira Ayuso10.06%14.76%
Total1583100.00%21100.00%
Directory: net/phonet
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