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author | Thomas Gleixner <tglx@linutronix.de> | 2020-06-30 12:07:51 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-30 12:07:51 +0200 |
commit | 98817a84ff1c755c347ac633ff017a623a631fad (patch) | |
tree | 93bd22485a697d1dbba97b2829b82e03c08ae57f /net/ipv4/ipmr.c | |
parent | 0e698dfa282211e414076f9dc7e83c1c288314fd (diff) | |
parent | 005c34ae4b44f085120d7f371121ec7ded677761 (diff) | |
download | linux-98817a84ff1c755c347ac633ff017a623a631fad.tar.bz2 |
Merge tag 'irqchip-fixes-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip fixes from Marc Zyngier:
- Fix atomicity of affinity update in the GIC driver
- Don't sleep in atomic when waiting for a GICv4.1 RD to respond
- Fix a couple of typos in user-visible messages
Diffstat (limited to 'net/ipv4/ipmr.c')
-rw-r--r-- | net/ipv4/ipmr.c | 130 |
1 files changed, 48 insertions, 82 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 9cf83cc85e4a..f5c7a58844a4 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -109,8 +109,10 @@ static void mroute_clean_tables(struct mr_table *mrt, int flags); static void ipmr_expire_process(struct timer_list *t); #ifdef CONFIG_IP_MROUTE_MULTIPLE_TABLES -#define ipmr_for_each_table(mrt, net) \ - list_for_each_entry_rcu(mrt, &net->ipv4.mr_tables, list) +#define ipmr_for_each_table(mrt, net) \ + list_for_each_entry_rcu(mrt, &net->ipv4.mr_tables, list, \ + lockdep_rtnl_is_held() || \ + list_empty(&net->ipv4.mr_tables)) static struct mr_table *ipmr_mr_table_iter(struct net *net, struct mr_table *mrt) @@ -419,37 +421,6 @@ static void ipmr_free_table(struct mr_table *mrt) /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ -static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) -{ - struct net *net = dev_net(dev); - - dev_close(dev); - - dev = __dev_get_by_name(net, "tunl0"); - if (dev) { - const struct net_device_ops *ops = dev->netdev_ops; - struct ifreq ifr; - struct ip_tunnel_parm p; - - memset(&p, 0, sizeof(p)); - p.iph.daddr = v->vifc_rmt_addr.s_addr; - p.iph.saddr = v->vifc_lcl_addr.s_addr; - p.iph.version = 4; - p.iph.ihl = 5; - p.iph.protocol = IPPROTO_IPIP; - sprintf(p.name, "dvmrp%d", v->vifc_vifi); - ifr.ifr_ifru.ifru_data = (__force void __user *)&p; - - if (ops->ndo_do_ioctl) { - mm_segment_t oldfs = get_fs(); - - set_fs(KERNEL_DS); - ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL); - set_fs(oldfs); - } - } -} - /* Initialize ipmr pimreg/tunnel in_device */ static bool ipmr_init_vif_indev(const struct net_device *dev) { @@ -469,51 +440,52 @@ static bool ipmr_init_vif_indev(const struct net_device *dev) static struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v) { - struct net_device *dev; - - dev = __dev_get_by_name(net, "tunl0"); + struct net_device *tunnel_dev, *new_dev; + struct ip_tunnel_parm p = { }; + int err; - if (dev) { - const struct net_device_ops *ops = dev->netdev_ops; - int err; - struct ifreq ifr; - struct ip_tunnel_parm p; + tunnel_dev = __dev_get_by_name(net, "tunl0"); + if (!tunnel_dev) + goto out; - memset(&p, 0, sizeof(p)); - p.iph.daddr = v->vifc_rmt_addr.s_addr; - p.iph.saddr = v->vifc_lcl_addr.s_addr; - p.iph.version = 4; - p.iph.ihl = 5; - p.iph.protocol = IPPROTO_IPIP; - sprintf(p.name, "dvmrp%d", v->vifc_vifi); - ifr.ifr_ifru.ifru_data = (__force void __user *)&p; + p.iph.daddr = v->vifc_rmt_addr.s_addr; + p.iph.saddr = v->vifc_lcl_addr.s_addr; + p.iph.version = 4; + p.iph.ihl = 5; + p.iph.protocol = IPPROTO_IPIP; + sprintf(p.name, "dvmrp%d", v->vifc_vifi); - if (ops->ndo_do_ioctl) { - mm_segment_t oldfs = get_fs(); + if (!tunnel_dev->netdev_ops->ndo_tunnel_ctl) + goto out; + err = tunnel_dev->netdev_ops->ndo_tunnel_ctl(tunnel_dev, &p, + SIOCADDTUNNEL); + if (err) + goto out; - set_fs(KERNEL_DS); - err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); - set_fs(oldfs); - } else { - err = -EOPNOTSUPP; - } - dev = NULL; - - if (err == 0 && - (dev = __dev_get_by_name(net, p.name)) != NULL) { - dev->flags |= IFF_MULTICAST; - if (!ipmr_init_vif_indev(dev)) - goto failure; - if (dev_open(dev, NULL)) - goto failure; - dev_hold(dev); - } - } - return dev; + new_dev = __dev_get_by_name(net, p.name); + if (!new_dev) + goto out; -failure: - unregister_netdevice(dev); - return NULL; + new_dev->flags |= IFF_MULTICAST; + if (!ipmr_init_vif_indev(new_dev)) + goto out_unregister; + if (dev_open(new_dev, NULL)) + goto out_unregister; + dev_hold(new_dev); + err = dev_set_allmulti(new_dev, 1); + if (err) { + dev_close(new_dev); + tunnel_dev->netdev_ops->ndo_tunnel_ctl(tunnel_dev, &p, + SIOCDELTUNNEL); + dev_put(new_dev); + new_dev = ERR_PTR(err); + } + return new_dev; + +out_unregister: + unregister_netdevice(new_dev); +out: + return ERR_PTR(-ENOBUFS); } #if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2) @@ -865,14 +837,8 @@ static int vif_add(struct net *net, struct mr_table *mrt, break; case VIFF_TUNNEL: dev = ipmr_new_tunnel(net, vifc); - if (!dev) - return -ENOBUFS; - err = dev_set_allmulti(dev, 1); - if (err) { - ipmr_del_tunnel(dev, vifc); - dev_put(dev); - return err; - } + if (IS_ERR(dev)) + return PTR_ERR(dev); break; case VIFF_USE_IFINDEX: case 0: @@ -2611,7 +2577,7 @@ static int ipmr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) mrt = ipmr_get_table(sock_net(skb->sk), filter.table_id); if (!mrt) { - if (filter.dump_all_families) + if (rtnl_msg_family(cb->nlh) != RTNL_FAMILY_IPMR) return skb->len; NL_SET_ERR_MSG(cb->extack, "ipv4: MR table does not exist"); |