diff options
Diffstat (limited to 'net/batman-adv/bat_v.c')
| -rw-r--r-- | net/batman-adv/bat_v.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c index 6baec4e68898..90e33f84d37a 100644 --- a/net/batman-adv/bat_v.c +++ b/net/batman-adv/bat_v.c @@ -27,11 +27,13 @@ #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/kref.h> +#include <linux/list.h> #include <linux/netdevice.h> #include <linux/netlink.h> #include <linux/rculist.h> #include <linux/rcupdate.h> #include <linux/seq_file.h> +#include <linux/spinlock.h> #include <linux/stddef.h> #include <linux/types.h> #include <linux/workqueue.h> @@ -915,13 +917,14 @@ static void batadv_v_gw_print(struct batadv_priv *bat_priv, * batadv_v_gw_dump_entry() - Dump a gateway into a message * @msg: Netlink message to dump into * @portid: Port making netlink request - * @seq: Sequence number of netlink message + * @cb: Control block containing additional options * @bat_priv: The bat priv with all the soft interface information * @gw_node: Gateway to be dumped * * Return: Error code, or 0 on success */ -static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, +static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid, + struct netlink_callback *cb, struct batadv_priv *bat_priv, struct batadv_gw_node *gw_node) { @@ -941,13 +944,16 @@ static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, curr_gw = batadv_gw_get_selected_gw_node(bat_priv); - hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, - NLM_F_MULTI, BATADV_CMD_GET_GATEWAYS); + hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq, + &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_GATEWAYS); if (!hdr) { ret = -ENOBUFS; goto out; } + genl_dump_check_consistent(cb, hdr); + ret = -EMSGSIZE; if (curr_gw == gw_node) { @@ -1018,13 +1024,15 @@ static void batadv_v_gw_dump(struct sk_buff *msg, struct netlink_callback *cb, int idx_skip = cb->args[0]; int idx = 0; - rcu_read_lock(); - hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) { + spin_lock_bh(&bat_priv->gw.list_lock); + cb->seq = bat_priv->gw.generation << 1 | 1; + + hlist_for_each_entry(gw_node, &bat_priv->gw.gateway_list, list) { if (idx++ < idx_skip) continue; - if (batadv_v_gw_dump_entry(msg, portid, cb->nlh->nlmsg_seq, - bat_priv, gw_node)) { + if (batadv_v_gw_dump_entry(msg, portid, cb, bat_priv, + gw_node)) { idx_skip = idx - 1; goto unlock; } @@ -1032,7 +1040,7 @@ static void batadv_v_gw_dump(struct sk_buff *msg, struct netlink_callback *cb, idx_skip = idx; unlock: - rcu_read_unlock(); + spin_unlock_bh(&bat_priv->gw.list_lock); cb->args[0] = idx_skip; } |