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path: root/net/hsr/hsr_netlink.c
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Diffstat (limited to 'net/hsr/hsr_netlink.c')
-rw-r--r--net/hsr/hsr_netlink.c119
1 files changed, 66 insertions, 53 deletions
diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c
index 8dc0547f01d0..5465a395da04 100644
--- a/net/hsr/hsr_netlink.c
+++ b/net/hsr/hsr_netlink.c
@@ -35,26 +35,34 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev,
unsigned char multicast_spec, hsr_version;
if (!data) {
- netdev_info(dev, "HSR: No slave devices specified\n");
+ NL_SET_ERR_MSG_MOD(extack, "No slave devices specified");
return -EINVAL;
}
if (!data[IFLA_HSR_SLAVE1]) {
- netdev_info(dev, "HSR: Slave1 device not specified\n");
+ NL_SET_ERR_MSG_MOD(extack, "Slave1 device not specified");
return -EINVAL;
}
link[0] = __dev_get_by_index(src_net,
nla_get_u32(data[IFLA_HSR_SLAVE1]));
+ if (!link[0]) {
+ NL_SET_ERR_MSG_MOD(extack, "Slave1 does not exist");
+ return -EINVAL;
+ }
if (!data[IFLA_HSR_SLAVE2]) {
- netdev_info(dev, "HSR: Slave2 device not specified\n");
+ NL_SET_ERR_MSG_MOD(extack, "Slave2 device not specified");
return -EINVAL;
}
link[1] = __dev_get_by_index(src_net,
nla_get_u32(data[IFLA_HSR_SLAVE2]));
+ if (!link[1]) {
+ NL_SET_ERR_MSG_MOD(extack, "Slave2 does not exist");
+ return -EINVAL;
+ }
- if (!link[0] || !link[1])
- return -ENODEV;
- if (link[0] == link[1])
+ if (link[0] == link[1]) {
+ NL_SET_ERR_MSG_MOD(extack, "Slave1 and Slave2 are same");
return -EINVAL;
+ }
if (!data[IFLA_HSR_MULTICAST_SPEC])
multicast_spec = 0;
@@ -66,34 +74,25 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev,
else
hsr_version = nla_get_u8(data[IFLA_HSR_VERSION]);
- return hsr_dev_finalize(dev, link, multicast_spec, hsr_version);
+ return hsr_dev_finalize(dev, link, multicast_spec, hsr_version, extack);
}
static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
- struct hsr_priv *hsr;
+ struct hsr_priv *hsr = netdev_priv(dev);
struct hsr_port *port;
- int res;
- hsr = netdev_priv(dev);
-
- res = 0;
-
- rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
- if (port)
- res = nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex);
- rcu_read_unlock();
- if (res)
- goto nla_put_failure;
+ if (port) {
+ if (nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex))
+ goto nla_put_failure;
+ }
- rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
- if (port)
- res = nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex);
- rcu_read_unlock();
- if (res)
- goto nla_put_failure;
+ if (port) {
+ if (nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex))
+ goto nla_put_failure;
+ }
if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN,
hsr->sup_multicast_addr) ||
@@ -251,15 +250,16 @@ static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
if (!na)
goto invalid;
- hsr_dev = __dev_get_by_index(genl_info_net(info),
- nla_get_u32(info->attrs[HSR_A_IFINDEX]));
+ rcu_read_lock();
+ hsr_dev = dev_get_by_index_rcu(genl_info_net(info),
+ nla_get_u32(info->attrs[HSR_A_IFINDEX]));
if (!hsr_dev)
- goto invalid;
+ goto rcu_unlock;
if (!is_hsr_master(hsr_dev))
- goto invalid;
+ goto rcu_unlock;
/* Send reply */
- skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb_out) {
res = -ENOMEM;
goto fail;
@@ -313,12 +313,10 @@ static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq);
if (res < 0)
goto nla_put_failure;
- rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
if (port)
res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX,
port->dev->ifindex);
- rcu_read_unlock();
if (res < 0)
goto nla_put_failure;
@@ -328,20 +326,22 @@ static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq);
if (res < 0)
goto nla_put_failure;
- rcu_read_lock();
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
if (port)
res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX,
port->dev->ifindex);
- rcu_read_unlock();
if (res < 0)
goto nla_put_failure;
+ rcu_read_unlock();
+
genlmsg_end(skb_out, msg_head);
genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
return 0;
+rcu_unlock:
+ rcu_read_unlock();
invalid:
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
return 0;
@@ -351,6 +351,7 @@ nla_put_failure:
/* Fall through */
fail:
+ rcu_read_unlock();
return res;
}
@@ -358,16 +359,14 @@ fail:
*/
static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
{
- /* For receiving */
- struct nlattr *na;
+ unsigned char addr[ETH_ALEN];
struct net_device *hsr_dev;
-
- /* For sending */
struct sk_buff *skb_out;
- void *msg_head;
struct hsr_priv *hsr;
- void *pos;
- unsigned char addr[ETH_ALEN];
+ bool restart = false;
+ struct nlattr *na;
+ void *pos = NULL;
+ void *msg_head;
int res;
if (!info)
@@ -377,15 +376,17 @@ static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
if (!na)
goto invalid;
- hsr_dev = __dev_get_by_index(genl_info_net(info),
- nla_get_u32(info->attrs[HSR_A_IFINDEX]));
+ rcu_read_lock();
+ hsr_dev = dev_get_by_index_rcu(genl_info_net(info),
+ nla_get_u32(info->attrs[HSR_A_IFINDEX]));
if (!hsr_dev)
- goto invalid;
+ goto rcu_unlock;
if (!is_hsr_master(hsr_dev))
- goto invalid;
+ goto rcu_unlock;
+restart:
/* Send reply */
- skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ skb_out = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!skb_out) {
res = -ENOMEM;
goto fail;
@@ -399,18 +400,26 @@ static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
goto nla_put_failure;
}
- res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
- if (res < 0)
- goto nla_put_failure;
+ if (!restart) {
+ res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
+ if (res < 0)
+ goto nla_put_failure;
+ }
hsr = netdev_priv(hsr_dev);
- rcu_read_lock();
- pos = hsr_get_next_node(hsr, NULL, addr);
+ if (!pos)
+ pos = hsr_get_next_node(hsr, NULL, addr);
while (pos) {
res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr);
if (res < 0) {
- rcu_read_unlock();
+ if (res == -EMSGSIZE) {
+ genlmsg_end(skb_out, msg_head);
+ genlmsg_unicast(genl_info_net(info), skb_out,
+ info->snd_portid);
+ restart = true;
+ goto restart;
+ }
goto nla_put_failure;
}
pos = hsr_get_next_node(hsr, pos, addr);
@@ -422,15 +431,18 @@ static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
return 0;
+rcu_unlock:
+ rcu_read_unlock();
invalid:
netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
return 0;
nla_put_failure:
- kfree_skb(skb_out);
+ nlmsg_free(skb_out);
/* Fall through */
fail:
+ rcu_read_unlock();
return res;
}
@@ -457,6 +469,7 @@ static struct genl_family hsr_genl_family __ro_after_init = {
.version = 1,
.maxattr = HSR_A_MAX,
.policy = hsr_genl_policy,
+ .netnsok = true,
.module = THIS_MODULE,
.ops = hsr_ops,
.n_ops = ARRAY_SIZE(hsr_ops),
generated by cgit (git 2.34.1) at 2024-06-07 13:53:55 +0000