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Merge branch 'ifa_list-RCU' 

Florian Westphal says:

====================
net: add rcu annotations for ifa_list

v3: fix typo in patch1 commit message
    All other patches are unchanged.
v2: remove ifa_list iteration in afs instead of conversion

Eric Dumazet reported following problem:

  It looks that unless RTNL is held, accessing ifa_list needs proper RCU
  protection.  indev->ifa_list can be changed under us by another cpu
  (which owns RTNL) [..]

  A proper rcu_dereference() with an happy sparse support would require
  adding __rcu attribute.

This patch series does that: add __rcu to the ifa_list pointers.
That makes sparse complain, so the series also adds the required
rcu_assign_pointer/dereference helpers where needed.

All patches except the last one are preparation work.
Two new macros are introduced for in_ifaddr walks.

Last patch adds the __rcu annotations and the assign_pointer/dereference
helper calls.

This patch is a bit large, but I found no better way -- other
approaches (annotate-first or add helpers-first) all result in
mid-series sparse warnings.

This series is submitted vs. net-next rather than net for several
reasons:

1. Its (mostly) compile-tested only
2. 3rd patch changes behaviour wrt. secondary addresses
   (see changelog)
3. The problem exists for a very long time (2004), so it doesn't
   seem to be urgent to fix this -- rcu use to free ifa_list
   predates the git era.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2019-06-02 18:08:47 -07:00
parent b9f8898275 2638eb8b50
commit feb3cf2e5e
34 changed files with 251 additions and 230 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/infiniband/core/roce_gid_mgmt.c
View File

@ -330,6 +330,7 @@ static void bond_delete_netdev_default_gids(struct ib_device *ib_dev,
static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
u8 port, struct net_device *ndev)
{
const struct in_ifaddr *ifa;
struct in_device *in_dev;
struct sin_list {
struct list_head list;
@ -349,7 +350,7 @@ static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
return;
}
for_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
if (!entry)
@ -359,7 +360,7 @@ static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
entry->ip.sin_addr.s_addr = ifa->ifa_address;
list_add_tail(&entry->list, &sin_list);
}
endfor_ifa(in_dev);
rcu_read_unlock();
list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) {

9
drivers/infiniband/hw/cxgb4/cm.c
View File

@ -3230,17 +3230,22 @@ static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
int found = 0;
struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
const struct in_ifaddr *ifa;
ind = in_dev_get(dev->rdev.lldi.ports[0]);
if (!ind)
return -EADDRNOTAVAIL;
for_primary_ifa(ind) {
rcu_read_lock();
in_dev_for_each_ifa_rcu(ifa, ind) {
if (ifa->ifa_flags & IFA_F_SECONDARY)
continue;
laddr->sin_addr.s_addr = ifa->ifa_address;
raddr->sin_addr.s_addr = ifa->ifa_address;
found = 1;
break;
}
endfor_ifa(ind);
rcu_read_unlock();
in_dev_put(ind);
return found ? 0 : -EADDRNOTAVAIL;
}

7
drivers/infiniband/hw/i40iw/i40iw_cm.c
View File

@ -1773,8 +1773,11 @@ static enum i40iw_status_code i40iw_add_mqh_4(
if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) &&
(rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
(dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
const struct in_ifaddr *ifa;
idev = in_dev_get(dev);
for_ifa(idev) {
in_dev_for_each_ifa_rtnl(ifa, idev) {
i40iw_debug(&iwdev->sc_dev,
I40IW_DEBUG_CM,
"Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",
@ -1819,7 +1822,7 @@ static enum i40iw_status_code i40iw_add_mqh_4(
cm_parent_listen_node->cm_core->stats_listen_nodes_created--;
}
}
endfor_ifa(idev);
in_dev_put(idev);
}
}

6
drivers/infiniband/hw/i40iw/i40iw_main.c
View File

@ -1222,8 +1222,10 @@ static void i40iw_add_ipv4_addr(struct i40iw_device *iwdev)
if ((((rdma_vlan_dev_vlan_id(dev) < 0xFFFF) &&
(rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) ||
(dev == iwdev->netdev)) && (dev->flags & IFF_UP)) {
const struct in_ifaddr *ifa;
idev = in_dev_get(dev);
for_ifa(idev) {
in_dev_for_each_ifa_rtnl(ifa, idev) {
i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM,
"IP=%pI4, vlan_id=%d, MAC=%pM\n", &ifa->ifa_address,
rdma_vlan_dev_vlan_id(dev), dev->dev_addr);
@ -1235,7 +1237,7 @@ static void i40iw_add_ipv4_addr(struct i40iw_device *iwdev)
true,
I40IW_ARP_ADD);
}
endfor_ifa(idev);
in_dev_put(idev);
}
}

12
drivers/infiniband/hw/i40iw/i40iw_utils.c
View File

@ -174,10 +174,14 @@ int i40iw_inetaddr_event(struct notifier_block *notifier,
rcu_read_lock();
in = __in_dev_get_rcu(upper_dev);
if (!in->ifa_list)
local_ipaddr = 0;
else
local_ipaddr = ntohl(in->ifa_list->ifa_address);
local_ipaddr = 0;
if (in) {
struct in_ifaddr *ifa;
ifa = rcu_dereference(in->ifa_list);
if (ifa)
local_ipaddr = ntohl(ifa->ifa_address);
}
rcu_read_unlock();
} else {

8
drivers/infiniband/hw/nes/nes.c
View File

@ -183,7 +183,13 @@ static int nes_inetaddr_event(struct notifier_block *notifier,
rcu_read_lock();
in = __in_dev_get_rcu(upper_dev);
nesvnic->local_ipaddr = in->ifa_list->ifa_address;
if (in) {
struct in_ifaddr *ifa;
ifa = rcu_dereference(in->ifa_list);
if (ifa)
nesvnic->local_ipaddr = ifa->ifa_address;
}
rcu_read_unlock();
} else {
nesvnic->local_ipaddr = ifa->ifa_address;

15
drivers/infiniband/hw/usnic/usnic_ib_main.c
View File

@ -427,11 +427,16 @@ static void *usnic_ib_device_add(struct pci_dev *dev)
if (netif_carrier_ok(us_ibdev->netdev))
usnic_fwd_carrier_up(us_ibdev->ufdev);
ind = in_dev_get(netdev);
if (ind->ifa_list)
usnic_fwd_add_ipaddr(us_ibdev->ufdev,
ind->ifa_list->ifa_address);
in_dev_put(ind);
rcu_read_lock();
ind = __in_dev_get_rcu(netdev);
if (ind) {
const struct in_ifaddr *ifa;
ifa = rcu_dereference(ind->ifa_list);
if (ifa)
usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address);
}
rcu_read_unlock();
usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr,
us_ibdev->ufdev->inaddr, &gid.raw[0]);

8
drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
View File

@ -3248,6 +3248,7 @@ netxen_config_indev_addr(struct netxen_adapter *adapter,
struct net_device *dev, unsigned long event)
{
struct in_device *indev;
struct in_ifaddr *ifa;
if (!netxen_destip_supported(adapter))
return;
@ -3256,7 +3257,8 @@ netxen_config_indev_addr(struct netxen_adapter *adapter,
if (!indev)
return;
for_ifa(indev) {
rcu_read_lock();
in_dev_for_each_ifa_rcu(ifa, indev) {
switch (event) {
case NETDEV_UP:
netxen_list_config_ip(adapter, ifa, NX_IP_UP);
@ -3267,8 +3269,8 @@ netxen_config_indev_addr(struct netxen_adapter *adapter,
default:
break;
}
} endfor_ifa(indev);
}
rcu_read_unlock();
in_dev_put(indev);
}

5
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
View File

@ -4119,13 +4119,14 @@ static void
qlcnic_config_indev_addr(struct qlcnic_adapter *adapter,
struct net_device *dev, unsigned long event)
{
const struct in_ifaddr *ifa;
struct in_device *indev;
indev = in_dev_get(dev);
if (!indev)
return;
for_ifa(indev) {
in_dev_for_each_ifa_rtnl(ifa, indev) {
switch (event) {
case NETDEV_UP:
qlcnic_config_ipaddr(adapter,
@ -4138,7 +4139,7 @@ qlcnic_config_indev_addr(struct qlcnic_adapter *adapter,
default:
break;
}
} endfor_ifa(indev);
}
in_dev_put(indev);
}

2
drivers/net/ethernet/via/via-velocity.h
View File

@ -1509,7 +1509,7 @@ static inline int velocity_get_ip(struct velocity_info *vptr)
rcu_read_lock();
in_dev = __in_dev_get_rcu(vptr->netdev);
if (in_dev != NULL) {
ifa = (struct in_ifaddr *) in_dev->ifa_list;
ifa = rcu_dereference(in_dev->ifa_list);
if (ifa != NULL) {
memcpy(vptr->ip_addr, &ifa->ifa_address, 4);
res = 0;

4
drivers/net/plip/plip.c
View File

@ -1012,7 +1012,7 @@ plip_rewrite_address(const struct net_device *dev, struct ethhdr *eth)
in_dev = __in_dev_get_rcu(dev);
if (in_dev) {
/* Any address will do - we take the first */
const struct in_ifaddr *ifa = in_dev->ifa_list;
const struct in_ifaddr *ifa = rcu_dereference(in_dev->ifa_list);
if (ifa) {
memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
memset(eth->h_dest, 0xfc, 2);
@ -1107,7 +1107,7 @@ plip_open(struct net_device *dev)
/* Any address will do - we take the first. We already
have the first two bytes filled with 0xfc, from
plip_init_dev(). */
struct in_ifaddr *ifa=in_dev->ifa_list;
const struct in_ifaddr *ifa = rcu_dereference(in_dev->ifa_list);
if (ifa != NULL) {
memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
}

21
drivers/net/vmxnet3/vmxnet3_drv.c
View File

@ -3651,13 +3651,19 @@ vmxnet3_suspend(struct device *device)
}
if (adapter->wol & WAKE_ARP) {
in_dev = in_dev_get(netdev);
if (!in_dev)
goto skip_arp;
rcu_read_lock();
ifa = (struct in_ifaddr *)in_dev->ifa_list;
if (!ifa)
in_dev = __in_dev_get_rcu(netdev);
if (!in_dev) {
rcu_read_unlock();
goto skip_arp;
}
ifa = rcu_dereference(in_dev->ifa_list);
if (!ifa) {
rcu_read_unlock();
goto skip_arp;
}
pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
sizeof(struct arphdr) + /* ARP header */
@ -3677,7 +3683,9 @@ vmxnet3_suspend(struct device *device)
/* The Unicast IPv4 address in 'tip' field. */
arpreq += 2 * ETH_ALEN + sizeof(u32);
*(u32 *)arpreq = ifa->ifa_address;
*(__be32 *)arpreq = ifa->ifa_address;
rcu_read_unlock();
/* The mask for the relevant bits. */
pmConf->filters[i].mask[0] = 0x00;
@ -3686,7 +3694,6 @@ vmxnet3_suspend(struct device *device)
pmConf->filters[i].mask[3] = 0x00;
pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
in_dev_put(in_dev);
pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
i++;

11
drivers/net/wan/hdlc_cisco.c
View File

@ -196,16 +196,15 @@ static int cisco_rx(struct sk_buff *skb)
mask = ~cpu_to_be32(0); /* is the mask correct? */
if (in_dev != NULL) {
struct in_ifaddr **ifap = &in_dev->ifa_list;
const struct in_ifaddr *ifa;
while (*ifap != NULL) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (strcmp(dev->name,
(*ifap)->ifa_label) == 0) {
addr = (*ifap)->ifa_local;
mask = (*ifap)->ifa_mask;
ifa->ifa_label) == 0) {
addr = ifa->ifa_local;
mask = ifa->ifa_mask;
break;
}
ifap = &(*ifap)->ifa_next;
}
cisco_keepalive_send(dev, CISCO_ADDR_REPLY,

4
drivers/net/wireless/ath/ath6kl/cfg80211.c
View File

@ -2194,13 +2194,13 @@ static int ath6kl_wow_suspend_vif(struct ath6kl_vif *vif,
if (!in_dev)
return 0;
ifa = in_dev->ifa_list;
ifa = rtnl_dereference(in_dev->ifa_list);
memset(&ips, 0, sizeof(ips));
/* Configure IP addr only if IP address count < MAX_IP_ADDRS */
while (index < MAX_IP_ADDRS && ifa) {
ips[index] = ifa->ifa_local;
ifa = ifa->ifa_next;
ifa = rtnl_dereference(ifa->ifa_next);
index++;
}

2
drivers/net/wireless/marvell/mwifiex/cfg80211.c
View File

@ -3268,7 +3268,7 @@ static void mwifiex_set_auto_arp_mef_entry(struct mwifiex_private *priv,
in_dev = __in_dev_get_rtnl(adapter->priv[i]->netdev);
if (!in_dev)
continue;
ifa = in_dev->ifa_list;
ifa = rtnl_dereference(in_dev->ifa_list);
if (!ifa || !ifa->ifa_local)
continue;
ips[i] = ifa->ifa_local;

6
drivers/staging/isdn/hysdn/hysdn_net.c
View File

@ -70,9 +70,13 @@ net_open(struct net_device *dev)
for (i = 0; i < ETH_ALEN; i++)
dev->dev_addr[i] = 0xfc;
if ((in_dev = dev->ip_ptr) != NULL) {
struct in_ifaddr *ifa = in_dev->ifa_list;
const struct in_ifaddr *ifa;
rcu_read_lock();
ifa = rcu_dereference(in_dev->ifa_list);
if (ifa != NULL)
memcpy(dev->dev_addr + (ETH_ALEN - sizeof(ifa->ifa_local)), &ifa->ifa_local, sizeof(ifa->ifa_local));
rcu_read_unlock();
}
} else
memcpy(dev->dev_addr, card->mac_addr, ETH_ALEN);

1
fs/afs/Makefile
View File

@ -29,7 +29,6 @@ kafs-y := \
server.o \
server_list.o \
super.o \
netdevices.o \
vlclient.o \
vl_list.o \
vl_probe.o \

24
fs/afs/cmservice.c
View File

@ -584,9 +584,8 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call)
*/
static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
{
struct afs_interface *ifs;
struct afs_call *call = container_of(work, struct afs_call, work);
int loop, nifs;
int loop;
struct {
struct /* InterfaceAddr */ {
@ -604,19 +603,7 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
_enter("");
nifs = 0;
ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
if (ifs) {
nifs = afs_get_ipv4_interfaces(call->net, ifs, 32, false);
if (nifs < 0) {
kfree(ifs);
ifs = NULL;
nifs = 0;
}
}
memset(&reply, 0, sizeof(reply));
reply.ia.nifs = htonl(nifs);
reply.ia.uuid[0] = call->net->uuid.time_low;
reply.ia.uuid[1] = htonl(ntohs(call->net->uuid.time_mid));
@ -626,15 +613,6 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
for (loop = 0; loop < 6; loop++)
reply.ia.uuid[loop + 5] = htonl((s8) call->net->uuid.node[loop]);
if (ifs) {
for (loop = 0; loop < nifs; loop++) {
reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
}
kfree(ifs);
}
reply.cap.capcount = htonl(1);
reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
afs_send_simple_reply(call, &reply, sizeof(reply));

15
fs/afs/internal.h
View File

@ -724,15 +724,6 @@ struct afs_permits {
struct afs_permit permits[]; /* List of permits sorted by key pointer */
};
/*
* record of one of a system's set of network interfaces
*/
struct afs_interface {
struct in_addr address; /* IPv4 address bound to interface */
struct in_addr netmask; /* netmask applied to address */
unsigned mtu; /* MTU of interface */
};
/*
* Error prioritisation and accumulation.
*/
@ -1095,12 +1086,6 @@ extern const struct file_operations afs_mntpt_file_operations;
extern struct vfsmount *afs_d_automount(struct path *);
extern void afs_mntpt_kill_timer(void);
/*
* netdevices.c
*/
extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
size_t, bool);
/*
* proc.c
*/

48
fs/afs/netdevices.c
View File

@ -1,48 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/* AFS network device helpers
*
* Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
*/
#include <linux/string.h>
#include <linux/rtnetlink.h>
#include <linux/inetdevice.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <net/net_namespace.h>
#include "internal.h"
/*
* get a list of this system's interface IPv4 addresses, netmasks and MTUs
* - maxbufs must be at least 1
* - returns the number of interface records in the buffer
*/
int afs_get_ipv4_interfaces(struct afs_net *net, struct afs_interface *bufs,
size_t maxbufs, bool wantloopback)
{
struct net_device *dev;
struct in_device *idev;
int n = 0;
ASSERT(maxbufs > 0);
rtnl_lock();
for_each_netdev(net->net, dev) {
if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
continue;
idev = __in_dev_get_rtnl(dev);
if (!idev)
continue;
for_primary_ifa(idev) {
bufs[n].address.s_addr = ifa->ifa_address;
bufs[n].netmask.s_addr = ifa->ifa_mask;
bufs[n].mtu = dev->mtu;
n++;
if (n >= maxbufs)
goto out;
} endfor_ifa(idev);
}
out:
rtnl_unlock();
return n;
}

19
include/linux/inetdevice.h
View File

@ -26,7 +26,7 @@ struct in_device {
struct net_device *dev;
refcount_t refcnt;
int dead;
struct in_ifaddr *ifa_list; /* IP ifaddr chain */
struct in_ifaddr __rcu *ifa_list;/* IP ifaddr chain */
struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
struct ip_mc_list __rcu * __rcu *mc_hash;
@ -136,7 +136,7 @@ static inline void ipv4_devconf_setall(struct in_device *in_dev)
struct in_ifaddr {
struct hlist_node hash;
struct in_ifaddr *ifa_next;
struct in_ifaddr __rcu *ifa_next;
struct in_device *ifa_dev;
struct rcu_head rcu_head;
__be32 ifa_local;
@ -186,7 +186,7 @@ __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
__be32 mask);
struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr);
static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
static inline bool inet_ifa_match(__be32 addr, const struct in_ifaddr *ifa)
{
return !((addr^ifa->ifa_address)&ifa->ifa_mask);
}
@ -206,14 +206,13 @@ static __inline__ bool bad_mask(__be32 mask, __be32 addr)
return false;
}
#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
#define in_dev_for_each_ifa_rtnl(ifa, in_dev) \
for (ifa = rtnl_dereference((in_dev)->ifa_list); ifa; \
ifa = rtnl_dereference(ifa->ifa_next))
#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
#define endfor_ifa(in_dev) }
#define in_dev_for_each_ifa_rcu(ifa, in_dev) \
for (ifa = rcu_dereference((in_dev)->ifa_list); ifa; \
ifa = rcu_dereference(ifa->ifa_next))
static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
{

12
net/core/netpoll.c
View File

@ -696,16 +696,22 @@ int netpoll_setup(struct netpoll *np)
if (!np->local_ip.ip) {
if (!np->ipv6) {
in_dev = __in_dev_get_rtnl(ndev);
const struct in_ifaddr *ifa;
if (!in_dev || !in_dev->ifa_list) {
in_dev = __in_dev_get_rtnl(ndev);
if (!in_dev)
goto put_noaddr;
ifa = rtnl_dereference(in_dev->ifa_list);
if (!ifa) {
put_noaddr:
np_err(np, "no IP address for %s, aborting\n",
np->dev_name);
err = -EDESTADDRREQ;
goto put;
}
np->local_ip.ip = in_dev->ifa_list->ifa_local;
np->local_ip.ip = ifa->ifa_local;
np_info(np, "local IP %pI4\n", &np->local_ip.ip);
} else {
#if IS_ENABLED(CONFIG_IPV6)

8
net/core/pktgen.c
View File

@ -2125,9 +2125,11 @@ static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
rcu_read_lock();
in_dev = __in_dev_get_rcu(pkt_dev->odev);
if (in_dev) {
if (in_dev->ifa_list) {
pkt_dev->saddr_min =
in_dev->ifa_list->ifa_address;
const struct in_ifaddr *ifa;
ifa = rcu_dereference(in_dev->ifa_list);
if (ifa) {
pkt_dev->saddr_min = ifa->ifa_address;
pkt_dev->saddr_max = pkt_dev->saddr_min;
}
}

144
net/ipv4/devinet.c
View File

@ -194,7 +194,8 @@ static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32);
static BLOCKING_NOTIFIER_HEAD(inetaddr_chain);
static BLOCKING_NOTIFIER_HEAD(inetaddr_validator_chain);
static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
static void inet_del_ifa(struct in_device *in_dev,
struct in_ifaddr __rcu **ifap,
int destroy);
#ifdef CONFIG_SYSCTL
static int devinet_sysctl_register(struct in_device *idev);
@ -300,8 +301,8 @@ static void in_dev_rcu_put(struct rcu_head *head)
static void inetdev_destroy(struct in_device *in_dev)
{
struct in_ifaddr *ifa;
struct net_device *dev;
struct in_ifaddr *ifa;
ASSERT_RTNL();
@ -311,7 +312,7 @@ static void inetdev_destroy(struct in_device *in_dev)
ip_mc_destroy_dev(in_dev);
while ((ifa = in_dev->ifa_list) != NULL) {
while ((ifa = rtnl_dereference(in_dev->ifa_list)) != NULL) {
inet_del_ifa(in_dev, &in_dev->ifa_list, 0);
inet_free_ifa(ifa);
}
@ -327,30 +328,35 @@ static void inetdev_destroy(struct in_device *in_dev)
int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b)
{
const struct in_ifaddr *ifa;
rcu_read_lock();
for_primary_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (inet_ifa_match(a, ifa)) {
if (!b || inet_ifa_match(b, ifa)) {
rcu_read_unlock();
return 1;
}
}
} endfor_ifa(in_dev);
}
rcu_read_unlock();
return 0;
}
static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
int destroy, struct nlmsghdr *nlh, u32 portid)
static void __inet_del_ifa(struct in_device *in_dev,
struct in_ifaddr __rcu **ifap,
int destroy, struct nlmsghdr *nlh, u32 portid)
{
struct in_ifaddr *promote = NULL;
struct in_ifaddr *ifa, *ifa1 = *ifap;
struct in_ifaddr *last_prim = in_dev->ifa_list;
struct in_ifaddr *ifa, *ifa1;
struct in_ifaddr *last_prim;
struct in_ifaddr *prev_prom = NULL;
int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev);
ASSERT_RTNL();
ifa1 = rtnl_dereference(*ifap);
last_prim = rtnl_dereference(in_dev->ifa_list);
if (in_dev->dead)
goto no_promotions;
@ -359,9 +365,9 @@ static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
**/
if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) {
struct in_ifaddr **ifap1 = &ifa1->ifa_next;
struct in_ifaddr __rcu **ifap1 = &ifa1->ifa_next;
while ((ifa = *ifap1) != NULL) {
while ((ifa = rtnl_dereference(*ifap1)) != NULL) {
if (!(ifa->ifa_flags & IFA_F_SECONDARY) &&
ifa1->ifa_scope <= ifa->ifa_scope)
last_prim = ifa;
@ -394,7 +400,7 @@ static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
* and later to add them back with new prefsrc. Do this
* while all addresses are on the device list.
*/
for (ifa = promote; ifa; ifa = ifa->ifa_next) {
for (ifa = promote; ifa; ifa = rtnl_dereference(ifa->ifa_next)) {
if (ifa1->ifa_mask == ifa->ifa_mask &&
inet_ifa_match(ifa1->ifa_address, ifa))
fib_del_ifaddr(ifa, ifa1);
@ -420,19 +426,24 @@ static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1);
if (promote) {
struct in_ifaddr *next_sec = promote->ifa_next;
struct in_ifaddr *next_sec;
next_sec = rtnl_dereference(promote->ifa_next);
if (prev_prom) {
prev_prom->ifa_next = promote->ifa_next;
promote->ifa_next = last_prim->ifa_next;
last_prim->ifa_next = promote;
struct in_ifaddr *last_sec;
last_sec = rtnl_dereference(last_prim->ifa_next);
rcu_assign_pointer(prev_prom->ifa_next, next_sec);
rcu_assign_pointer(promote->ifa_next, last_sec);
rcu_assign_pointer(last_prim->ifa_next, promote);
}
promote->ifa_flags &= ~IFA_F_SECONDARY;
rtmsg_ifa(RTM_NEWADDR, promote, nlh, portid);
blocking_notifier_call_chain(&inetaddr_chain,
NETDEV_UP, promote);
for (ifa = next_sec; ifa; ifa = ifa->ifa_next) {
for (ifa = next_sec; ifa;
ifa = rtnl_dereference(ifa->ifa_next)) {
if (ifa1->ifa_mask != ifa->ifa_mask ||
!inet_ifa_match(ifa1->ifa_address, ifa))
continue;
@ -444,7 +455,8 @@ static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
inet_free_ifa(ifa1);
}
static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
static void inet_del_ifa(struct in_device *in_dev,
struct in_ifaddr __rcu **ifap,
int destroy)
{
__inet_del_ifa(in_dev, ifap, destroy, NULL, 0);
@ -457,9 +469,10 @@ static DECLARE_DELAYED_WORK(check_lifetime_work, check_lifetime);
static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh,
u32 portid, struct netlink_ext_ack *extack)
{
struct in_ifaddr __rcu **last_primary, **ifap;
struct in_device *in_dev = ifa->ifa_dev;
struct in_ifaddr *ifa1, **ifap, **last_primary;
struct in_validator_info ivi;
struct in_ifaddr *ifa1;
int ret;
ASSERT_RTNL();
@ -472,8 +485,10 @@ static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh,
ifa->ifa_flags &= ~IFA_F_SECONDARY;
last_primary = &in_dev->ifa_list;
for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL;
ifap = &ifa1->ifa_next) {
ifap = &in_dev->ifa_list;
ifa1 = rtnl_dereference(*ifap);
while (ifa1) {
if (!(ifa1->ifa_flags & IFA_F_SECONDARY) &&
ifa->ifa_scope <= ifa1->ifa_scope)
last_primary = &ifa1->ifa_next;
@ -489,6 +504,9 @@ static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh,
}
ifa->ifa_flags |= IFA_F_SECONDARY;
}
ifap = &ifa1->ifa_next;
ifa1 = rtnl_dereference(*ifap);
}
/* Allow any devices that wish to register ifaddr validtors to weigh
@ -514,8 +532,8 @@ static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh,
ifap = last_primary;
}
ifa->ifa_next = *ifap;
*ifap = ifa;
rcu_assign_pointer(ifa->ifa_next, *ifap);
rcu_assign_pointer(*ifap, ifa);
inet_hash_insert(dev_net(in_dev->dev), ifa);
@ -580,12 +598,14 @@ EXPORT_SYMBOL(inetdev_by_index);
struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
__be32 mask)
{
struct in_ifaddr *ifa;
ASSERT_RTNL();
for_primary_ifa(in_dev) {
in_dev_for_each_ifa_rtnl(ifa, in_dev) {
if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa))
return ifa;
} endfor_ifa(in_dev);
}
return NULL;
}
@ -613,10 +633,12 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct in_ifaddr __rcu **ifap;
struct nlattr *tb[IFA_MAX+1];
struct in_device *in_dev;
struct ifaddrmsg *ifm;
struct in_ifaddr *ifa, **ifap;
struct in_ifaddr *ifa;
int err = -EINVAL;
ASSERT_RTNL();
@ -633,7 +655,7 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh,
goto errout;
}
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
for (ifap = &in_dev->ifa_list; (ifa = rtnl_dereference(*ifap)) != NULL;
ifap = &ifa->ifa_next) {
if (tb[IFA_LOCAL] &&
ifa->ifa_local != nla_get_in_addr(tb[IFA_LOCAL]))
@ -721,15 +743,20 @@ static void check_lifetime(struct work_struct *work)
if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME &&
age >= ifa->ifa_valid_lft) {
struct in_ifaddr **ifap;
struct in_ifaddr __rcu **ifap;
struct in_ifaddr *tmp;
for (ifap = &ifa->ifa_dev->ifa_list;
*ifap != NULL; ifap = &(*ifap)->ifa_next) {
if (*ifap == ifa) {
ifap = &ifa->ifa_dev->ifa_list;
tmp = rtnl_dereference(*ifap);
while (tmp) {
tmp = rtnl_dereference(tmp->ifa_next);
if (rtnl_dereference(*ifap) == ifa) {
inet_del_ifa(ifa->ifa_dev,
ifap, 1);
break;
}
ifap = &tmp->ifa_next;
tmp = rtnl_dereference(*ifap);
}
} else if (ifa->ifa_preferred_lft !=
INFINITY_LIFE_TIME &&
@ -873,13 +900,12 @@ static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh,
static struct in_ifaddr *find_matching_ifa(struct in_ifaddr *ifa)
{
struct in_device *in_dev = ifa->ifa_dev;
struct in_ifaddr *ifa1, **ifap;
struct in_ifaddr *ifa1;
if (!ifa->ifa_local)
return NULL;
for (ifap = &in_dev->ifa_list; (ifa1 = *ifap) != NULL;
ifap = &ifa1->ifa_next) {
in_dev_for_each_ifa_rtnl(ifa1, in_dev) {
if (ifa1->ifa_mask == ifa->ifa_mask &&
inet_ifa_match(ifa1->ifa_address, ifa) &&
ifa1->ifa_local == ifa->ifa_local)
@ -974,8 +1000,8 @@ int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
{
struct sockaddr_in sin_orig;
struct sockaddr_in *sin = (struct sockaddr_in *)&ifr->ifr_addr;
struct in_ifaddr __rcu **ifap = NULL;
struct in_device *in_dev;
struct in_ifaddr **ifap = NULL;
struct in_ifaddr *ifa = NULL;
struct net_device *dev;
char *colon;
@ -1046,7 +1072,9 @@ int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
/* note: we only do this for a limited set of ioctls
and only if the original address family was AF_INET.
This is checked above. */
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
for (ifap = &in_dev->ifa_list;
(ifa = rtnl_dereference(*ifap)) != NULL;
ifap = &ifa->ifa_next) {
if (!strcmp(ifr->ifr_name, ifa->ifa_label) &&
sin_orig.sin_addr.s_addr ==
@ -1059,7 +1087,8 @@ int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
4.3BSD-style and passed in junk so we fall back to
comparing just the label */
if (!ifa) {
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
for (ifap = &in_dev->ifa_list;
(ifa = rtnl_dereference(*ifap)) != NULL;
ifap = &ifa->ifa_next)
if (!strcmp(ifr->ifr_name, ifa->ifa_label))
break;
@ -1208,7 +1237,7 @@ int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size)
{
struct in_device *in_dev = __in_dev_get_rtnl(dev);
struct in_ifaddr *ifa;
const struct in_ifaddr *ifa;
struct ifreq ifr;
int done = 0;
@ -1218,7 +1247,7 @@ static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int s
if (!in_dev)
goto out;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
in_dev_for_each_ifa_rtnl(ifa, in_dev) {
if (!buf) {
done += size;
continue;
@ -1246,17 +1275,22 @@ static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int s
static __be32 in_dev_select_addr(const struct in_device *in_dev,
int scope)
{
for_primary_ifa(in_dev) {
const struct in_ifaddr *ifa;
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (ifa->ifa_flags & IFA_F_SECONDARY)
continue;
if (ifa->ifa_scope != RT_SCOPE_LINK &&
ifa->ifa_scope <= scope)
return ifa->ifa_local;
} endfor_ifa(in_dev);
}
return 0;
}
__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
{
const struct in_ifaddr *ifa;
__be32 addr = 0;
struct in_device *in_dev;
struct net *net = dev_net(dev);
@ -1267,7 +1301,9 @@ __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
if (!in_dev)
goto no_in_dev;
for_primary_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (ifa->ifa_flags & IFA_F_SECONDARY)
continue;
if (ifa->ifa_scope > scope)
continue;
if (!dst || inet_ifa_match(dst, ifa)) {
@ -1276,7 +1312,7 @@ __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
}
if (!addr)
addr = ifa->ifa_local;
} endfor_ifa(in_dev);
}
if (addr)
goto out_unlock;
@ -1321,10 +1357,11 @@ EXPORT_SYMBOL(inet_select_addr);
static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst,
__be32 local, int scope)
{
int same = 0;
const struct in_ifaddr *ifa;
__be32 addr = 0;
int same = 0;
for_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (!addr &&
(local == ifa->ifa_local || !local) &&
ifa->ifa_scope <= scope) {
@ -1350,7 +1387,7 @@ static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst,
same = 0;
}
}
} endfor_ifa(in_dev);
}
return same ? addr : 0;
}
@ -1424,7 +1461,7 @@ static void inetdev_changename(struct net_device *dev, struct in_device *in_dev)
struct in_ifaddr *ifa;
int named = 0;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
in_dev_for_each_ifa_rtnl(ifa, in_dev) {
char old[IFNAMSIZ], *dot;
memcpy(old, ifa->ifa_label, IFNAMSIZ);
@ -1454,10 +1491,9 @@ static void inetdev_send_gratuitous_arp(struct net_device *dev,
struct in_device *in_dev)
{
struct in_ifaddr *ifa;
const struct in_ifaddr *ifa;
for (ifa = in_dev->ifa_list; ifa;
ifa = ifa->ifa_next) {
in_dev_for_each_ifa_rtnl(ifa, in_dev) {
arp_send(ARPOP_REQUEST, ETH_P_ARP,
ifa->ifa_local, dev,
ifa->ifa_local, NULL,
@ -1727,15 +1763,17 @@ static int in_dev_dump_addr(struct in_device *in_dev, struct sk_buff *skb,
int ip_idx = 0;
int err;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next, ip_idx++) {
if (ip_idx < s_ip_idx)
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (ip_idx < s_ip_idx) {
ip_idx++;
continue;
}
err = inet_fill_ifaddr(skb, ifa, fillargs);
if (err < 0)
goto done;
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
ip_idx++;
}
err = 0;

24
net/ipv4/fib_frontend.c
View File

@ -540,14 +540,22 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
cfg->fc_oif = dev->ifindex;
cfg->fc_table = l3mdev_fib_table(dev);
if (colon) {
struct in_ifaddr *ifa;
struct in_device *in_dev = __in_dev_get_rtnl(dev);
const struct in_ifaddr *ifa;
struct in_device *in_dev;
in_dev = __in_dev_get_rtnl(dev);
if (!in_dev)
return -ENODEV;
*colon = ':';
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next)
rcu_read_lock();
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (strcmp(ifa->ifa_label, devname) == 0)
break;
}
rcu_read_unlock();
if (!ifa)
return -ENODEV;
cfg->fc_prefsrc = ifa->ifa_local;
@ -1177,8 +1185,8 @@ void fib_del_ifaddr(struct in_ifaddr *ifa, struct in_ifaddr *iprim)
*
* Scan address list to be sure that addresses are really gone.
*/
for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
rcu_read_lock();
in_dev_for_each_ifa_rcu(ifa1, in_dev) {
if (ifa1 == ifa) {
/* promotion, keep the IP */
gone = 0;
@ -1246,6 +1254,7 @@ void fib_del_ifaddr(struct in_ifaddr *ifa, struct in_ifaddr *iprim)
}
}
}
rcu_read_unlock();
no_promotions:
if (!(ok & BRD_OK))
@ -1415,6 +1424,7 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
struct netdev_notifier_info_ext *info_ext = ptr;
struct in_device *in_dev;
struct net *net = dev_net(dev);
struct in_ifaddr *ifa;
unsigned int flags;
if (event == NETDEV_UNREGISTER) {
@ -1429,9 +1439,9 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
switch (event) {
case NETDEV_UP:
for_ifa(in_dev) {
in_dev_for_each_ifa_rtnl(ifa, in_dev) {
fib_add_ifaddr(ifa);
} endfor_ifa(in_dev);
}
#ifdef CONFIG_IP_ROUTE_MULTIPATH
fib_sync_up(dev, RTNH_F_DEAD);
#endif

5
net/ipv4/igmp.c
View File

@ -336,14 +336,15 @@ static __be32 igmpv3_get_srcaddr(struct net_device *dev,
const struct flowi4 *fl4)
{
struct in_device *in_dev = __in_dev_get_rcu(dev);
const struct in_ifaddr *ifa;
if (!in_dev)
return htonl(INADDR_ANY);
for_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (fl4->saddr == ifa->ifa_local)
return fl4->saddr;
} endfor_ifa(in_dev);
}
return htonl(INADDR_ANY);
}

9
net/ipv4/netfilter/nf_tproxy_ipv4.c
View File

@ -53,6 +53,7 @@ EXPORT_SYMBOL_GPL(nf_tproxy_handle_time_wait4);
__be32 nf_tproxy_laddr4(struct sk_buff *skb, __be32 user_laddr, __be32 daddr)
{
const struct in_ifaddr *ifa;
struct in_device *indev;
__be32 laddr;
@ -61,10 +62,14 @@ __be32 nf_tproxy_laddr4(struct sk_buff *skb, __be32 user_laddr, __be32 daddr)
laddr = 0;
indev = __in_dev_get_rcu(skb->dev);
for_primary_ifa(indev) {
in_dev_for_each_ifa_rcu(ifa, indev) {
if (ifa->ifa_flags & IFA_F_SECONDARY)
continue;
laddr = ifa->ifa_local;
break;
} endfor_ifa(indev);
}
return laddr ? laddr : daddr;
}

4
net/ipv6/addrconf.c
View File

@ -3127,11 +3127,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
struct in_device *in_dev = __in_dev_get_rtnl(dev);
if (in_dev && (dev->flags & IFF_UP)) {
struct in_ifaddr *ifa;
int flag = scope;
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
in_dev_for_each_ifa_rtnl(ifa, in_dev) {
addr.s6_addr32[3] = ifa->ifa_local;
if (ifa->ifa_scope == RT_SCOPE_LINK)

4
net/mac80211/main.c
View File

@ -354,11 +354,11 @@ static int ieee80211_ifa_changed(struct notifier_block *nb,
sdata_lock(sdata);
/* Copy the addresses to the bss_conf list */
ifa = idev->ifa_list;
ifa = rtnl_dereference(idev->ifa_list);
while (ifa) {
if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
bss_conf->arp_addr_list[c] = ifa->ifa_address;
ifa = ifa->ifa_next;
ifa = rtnl_dereference(ifa->ifa_next);
c++;
}

9
net/netfilter/nf_conntrack_broadcast.c
View File

@ -41,12 +41,17 @@ int nf_conntrack_broadcast_help(struct sk_buff *skb,
in_dev = __in_dev_get_rcu(rt->dst.dev);
if (in_dev != NULL) {
for_primary_ifa(in_dev) {
const struct in_ifaddr *ifa;
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (ifa->ifa_flags & IFA_F_SECONDARY)
continue;
if (ifa->ifa_broadcast == iph->daddr) {
mask = ifa->ifa_mask;
break;
}
} endfor_ifa(in_dev);
}
}
if (mask == 0)

12
net/netfilter/nf_nat_redirect.c
View File

@ -47,15 +47,17 @@ nf_nat_redirect_ipv4(struct sk_buff *skb,
if (hooknum == NF_INET_LOCAL_OUT) {
newdst = htonl(0x7F000001);
} else {
struct in_device *indev;
struct in_ifaddr *ifa;
const struct in_device *indev;
newdst = 0;
indev = __in_dev_get_rcu(skb->dev);
if (indev && indev->ifa_list) {
ifa = indev->ifa_list;
newdst = ifa->ifa_local;
if (indev) {
const struct in_ifaddr *ifa;
ifa = rcu_dereference(indev->ifa_list);
if (ifa)
newdst = ifa->ifa_local;
}
if (!newdst)

5
net/netfilter/nfnetlink_osf.c
View File

@ -33,6 +33,7 @@ static inline int nf_osf_ttl(const struct sk_buff *skb,
{
struct in_device *in_dev = __in_dev_get_rcu(skb->dev);
const struct iphdr *ip = ip_hdr(skb);
const struct in_ifaddr *ifa;
int ret = 0;
if (ttl_check == NF_OSF_TTL_TRUE)
@ -42,15 +43,13 @@ static inline int nf_osf_ttl(const struct sk_buff *skb,
else if (ip->ttl <= f_ttl)
return 1;
for_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (inet_ifa_match(ip->saddr, ifa)) {
ret = (ip->ttl == f_ttl);
break;
}
}
endfor_ifa(in_dev);
return ret;
}

2
net/sctp/protocol.c
View File

@ -81,7 +81,7 @@ static void sctp_v4_copy_addrlist(struct list_head *addrlist,
return;
}
for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
/* Add the address to the local list. */
addr = kzalloc(sizeof(*addr), GFP_ATOMIC);
if (addr) {

11
net/smc/smc_clc.c
View File

@ -97,17 +97,19 @@ static int smc_clc_prfx_set4_rcu(struct dst_entry *dst, __be32 ipv4,
struct smc_clc_msg_proposal_prefix *prop)
{
struct in_device *in_dev = __in_dev_get_rcu(dst->dev);
const struct in_ifaddr *ifa;
if (!in_dev)
return -ENODEV;
for_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (!inet_ifa_match(ipv4, ifa))
continue;
prop->prefix_len = inet_mask_len(ifa->ifa_mask);
prop->outgoing_subnet = ifa->ifa_address & ifa->ifa_mask;
/* prop->ipv6_prefixes_cnt = 0; already done by memset before */
return 0;
} endfor_ifa(in_dev);
}
return -ENOENT;
}
@ -190,14 +192,15 @@ static int smc_clc_prfx_match4_rcu(struct net_device *dev,
struct smc_clc_msg_proposal_prefix *prop)
{
struct in_device *in_dev = __in_dev_get_rcu(dev);
const struct in_ifaddr *ifa;
if (!in_dev)
return -ENODEV;
for_ifa(in_dev) {
in_dev_for_each_ifa_rcu(ifa, in_dev) {
if (prop->prefix_len == inet_mask_len(ifa->ifa_mask) &&
inet_ifa_match(prop->outgoing_subnet, ifa))
return 0;
} endfor_ifa(in_dev);
}
return -ENOENT;
}