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@@ -37,20 +37,27 @@
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#include <linux/list.h>
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#include <linux/lockdep.h>
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#include <linux/netdevice.h>
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+#include <linux/netlink.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/seq_file.h>
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+#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/stddef.h>
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#include <linux/string.h>
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#include <linux/workqueue.h>
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+#include <net/genetlink.h>
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+#include <net/netlink.h>
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+#include <net/sock.h>
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+#include <uapi/linux/batman_adv.h>
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#include "bridge_loop_avoidance.h"
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#include "hard-interface.h"
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#include "hash.h"
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#include "log.h"
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#include "multicast.h"
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+#include "netlink.h"
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#include "originator.h"
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#include "packet.h"
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#include "soft-interface.h"
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@@ -1108,6 +1115,164 @@ out:
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return 0;
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}
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+/**
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+ * batadv_tt_local_dump_entry - Dump one TT local entry into a message
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+ * @msg :Netlink message to dump into
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+ * @portid: Port making netlink request
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+ * @seq: Sequence number of netlink message
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+ * @bat_priv: The bat priv with all the soft interface information
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+ * @common: tt local & tt global common data
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+ *
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+ * Return: Error code, or 0 on success
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+ */
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+static int
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+batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
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+ struct batadv_priv *bat_priv,
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+ struct batadv_tt_common_entry *common)
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+{
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+ void *hdr;
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+ struct batadv_softif_vlan *vlan;
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+ struct batadv_tt_local_entry *local;
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+ unsigned int last_seen_msecs;
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+ u32 crc;
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+
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+ local = container_of(common, struct batadv_tt_local_entry, common);
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+ last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen);
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+
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+ vlan = batadv_softif_vlan_get(bat_priv, common->vid);
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+ if (!vlan)
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+ return 0;
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+
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+ crc = vlan->tt.crc;
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+
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+ batadv_softif_vlan_put(vlan);
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+
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+ hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
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+ NLM_F_MULTI,
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+ BATADV_CMD_GET_TRANSTABLE_LOCAL);
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+ if (!hdr)
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+ return -ENOBUFS;
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+
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+ if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
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+ nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
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+ nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
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+ nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags))
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+ goto nla_put_failure;
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+
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+ if (!(common->flags & BATADV_TT_CLIENT_NOPURGE) &&
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+ nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, last_seen_msecs))
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+ goto nla_put_failure;
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+
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+ genlmsg_end(msg, hdr);
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+ return 0;
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+
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+ nla_put_failure:
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+ genlmsg_cancel(msg, hdr);
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+ return -EMSGSIZE;
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+}
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+
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+/**
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+ * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message
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+ * @msg: Netlink message to dump into
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+ * @portid: Port making netlink request
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+ * @seq: Sequence number of netlink message
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+ * @bat_priv: The bat priv with all the soft interface information
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+ * @head: Pointer to the list containing the local tt entries
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+ * @idx_s: Number of entries to skip
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+ *
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+ * Return: Error code, or 0 on success
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+ */
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+static int
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+batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
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+ struct batadv_priv *bat_priv,
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+ struct hlist_head *head, int *idx_s)
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+{
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+ struct batadv_tt_common_entry *common;
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+ int idx = 0;
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+
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+ rcu_read_lock();
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+ hlist_for_each_entry_rcu(common, head, hash_entry) {
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+ if (idx++ < *idx_s)
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+ continue;
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+
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+ if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv,
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+ common)) {
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+ rcu_read_unlock();
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+ *idx_s = idx - 1;
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+ return -EMSGSIZE;
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+ }
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+ }
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+ rcu_read_unlock();
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+
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+ *idx_s = 0;
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+ return 0;
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+}
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+
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+/**
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+ * batadv_tt_local_dump - Dump TT local entries into a message
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+ * @msg: Netlink message to dump into
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+ * @cb: Parameters from query
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+ *
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+ * Return: Error code, or 0 on success
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+ */
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+int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb)
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+{
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+ struct net *net = sock_net(cb->skb->sk);
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+ struct net_device *soft_iface;
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+ struct batadv_priv *bat_priv;
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+ struct batadv_hard_iface *primary_if = NULL;
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+ struct batadv_hashtable *hash;
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+ struct hlist_head *head;
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+ int ret;
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+ int ifindex;
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+ int bucket = cb->args[0];
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+ int idx = cb->args[1];
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+ int portid = NETLINK_CB(cb->skb).portid;
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+
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+ ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
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+ if (!ifindex)
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+ return -EINVAL;
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+
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+ soft_iface = dev_get_by_index(net, ifindex);
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+ if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
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+ ret = -ENODEV;
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+ goto out;
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+ }
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+
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+ bat_priv = netdev_priv(soft_iface);
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+
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+ primary_if = batadv_primary_if_get_selected(bat_priv);
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+ if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
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+ ret = -ENOENT;
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+ goto out;
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+ }
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+
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+ hash = bat_priv->tt.local_hash;
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+
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+ while (bucket < hash->size) {
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+ head = &hash->table[bucket];
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+
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+ if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq,
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+ bat_priv, head, &idx))
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+ break;
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+
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+ bucket++;
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+ }
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+
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+ ret = msg->len;
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+
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+ out:
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+ if (primary_if)
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+ batadv_hardif_put(primary_if);
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+ if (soft_iface)
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+ dev_put(soft_iface);
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+
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+ cb->args[0] = bucket;
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+ cb->args[1] = idx;
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+
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+ return ret;
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+}
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+
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static void
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batadv_tt_local_set_pending(struct batadv_priv *bat_priv,
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struct batadv_tt_local_entry *tt_local_entry,
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@@ -1755,6 +1920,218 @@ out:
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return 0;
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}
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+/**
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+ * batadv_tt_global_dump_subentry - Dump all TT local entries into a message
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+ * @msg: Netlink message to dump into
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+ * @portid: Port making netlink request
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+ * @seq: Sequence number of netlink message
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+ * @common: tt local & tt global common data
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+ * @orig: Originator node announcing a non-mesh client
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+ * @best: Is the best originator for the TT entry
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+ *
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+ * Return: Error code, or 0 on success
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+ */
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+static int
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+batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
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+ struct batadv_tt_common_entry *common,
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+ struct batadv_tt_orig_list_entry *orig,
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+ bool best)
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+{
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+ void *hdr;
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+ struct batadv_orig_node_vlan *vlan;
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+ u8 last_ttvn;
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+ u32 crc;
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+
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+ vlan = batadv_orig_node_vlan_get(orig->orig_node,
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+ common->vid);
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+ if (!vlan)
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+ return 0;
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+
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+ crc = vlan->tt.crc;
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+
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+ batadv_orig_node_vlan_put(vlan);
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+
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+ hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family,
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+ NLM_F_MULTI,
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+ BATADV_CMD_GET_TRANSTABLE_GLOBAL);
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+ if (!hdr)
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+ return -ENOBUFS;
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+
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+ last_ttvn = atomic_read(&orig->orig_node->last_ttvn);
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+
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+ if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) ||
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+ nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
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+ orig->orig_node->orig) ||
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+ nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) ||
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+ nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) ||
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+ nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) ||
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+ nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) ||
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+ nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags))
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+ goto nla_put_failure;
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+
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+ if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
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+ goto nla_put_failure;
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+
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+ genlmsg_end(msg, hdr);
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+ return 0;
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+
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+ nla_put_failure:
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+ genlmsg_cancel(msg, hdr);
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+ return -EMSGSIZE;
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+}
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+
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+/**
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+ * batadv_tt_global_dump_entry - Dump one TT global entry into a message
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+ * @msg: Netlink message to dump into
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+ * @portid: Port making netlink request
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+ * @seq: Sequence number of netlink message
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+ * @bat_priv: The bat priv with all the soft interface information
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+ * @common: tt local & tt global common data
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+ * @sub_s: Number of entries to skip
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+ *
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+ * This function assumes the caller holds rcu_read_lock().
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+ *
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+ * Return: Error code, or 0 on success
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+ */
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+static int
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+batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
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+ struct batadv_priv *bat_priv,
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+ struct batadv_tt_common_entry *common, int *sub_s)
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+{
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+ struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
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+ struct batadv_tt_global_entry *global;
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+ struct hlist_head *head;
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+ int sub = 0;
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+ bool best;
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+
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+ global = container_of(common, struct batadv_tt_global_entry, common);
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+ best_entry = batadv_transtable_best_orig(bat_priv, global);
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+ head = &global->orig_list;
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+
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+ hlist_for_each_entry_rcu(orig_entry, head, list) {
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+ if (sub++ < *sub_s)
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+ continue;
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+
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+ best = (orig_entry == best_entry);
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+
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+ if (batadv_tt_global_dump_subentry(msg, portid, seq, common,
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+ orig_entry, best)) {
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+ *sub_s = sub - 1;
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+ return -EMSGSIZE;
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+ }
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+ }
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+
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+ *sub_s = 0;
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+ return 0;
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+}
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+
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+/**
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+ * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message
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+ * @msg: Netlink message to dump into
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+ * @portid: Port making netlink request
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+ * @seq: Sequence number of netlink message
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+ * @bat_priv: The bat priv with all the soft interface information
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+ * @head: Pointer to the list containing the global tt entries
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+ * @idx_s: Number of entries to skip
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+ * @sub: Number of entries to skip
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+ *
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+ * Return: Error code, or 0 on success
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+ */
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+static int
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+batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
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+ struct batadv_priv *bat_priv,
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+ struct hlist_head *head, int *idx_s, int *sub)
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+{
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+ struct batadv_tt_common_entry *common;
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+ int idx = 0;
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+
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+ rcu_read_lock();
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+ hlist_for_each_entry_rcu(common, head, hash_entry) {
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+ if (idx++ < *idx_s)
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+ continue;
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+
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+ if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv,
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+ common, sub)) {
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+ rcu_read_unlock();
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+ *idx_s = idx - 1;
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+ return -EMSGSIZE;
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+ }
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+ }
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+ rcu_read_unlock();
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+
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+ *idx_s = 0;
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+ *sub = 0;
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+ return 0;
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+}
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+
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+/**
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+ * batadv_tt_global_dump - Dump TT global entries into a message
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+ * @msg: Netlink message to dump into
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+ * @cb: Parameters from query
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+ *
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+ * Return: Error code, or length of message on success
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+ */
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+int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb)
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+{
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+ struct net *net = sock_net(cb->skb->sk);
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+ struct net_device *soft_iface;
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+ struct batadv_priv *bat_priv;
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+ struct batadv_hard_iface *primary_if = NULL;
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+ struct batadv_hashtable *hash;
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+ struct hlist_head *head;
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+ int ret;
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+ int ifindex;
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+ int bucket = cb->args[0];
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+ int idx = cb->args[1];
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+ int sub = cb->args[2];
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+ int portid = NETLINK_CB(cb->skb).portid;
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+
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+ ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
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+ if (!ifindex)
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+ return -EINVAL;
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+
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+ soft_iface = dev_get_by_index(net, ifindex);
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+ if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
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+ ret = -ENODEV;
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+ goto out;
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+ }
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+
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+ bat_priv = netdev_priv(soft_iface);
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+
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+ primary_if = batadv_primary_if_get_selected(bat_priv);
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+ if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
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+ ret = -ENOENT;
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+ goto out;
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+ }
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+
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+ hash = bat_priv->tt.global_hash;
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+
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+ while (bucket < hash->size) {
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+ head = &hash->table[bucket];
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+
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+ if (batadv_tt_global_dump_bucket(msg, portid,
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+ cb->nlh->nlmsg_seq, bat_priv,
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+ head, &idx, &sub))
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+ break;
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+
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+ bucket++;
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+ }
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+
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+ ret = msg->len;
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+
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+ out:
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+ if (primary_if)
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+ batadv_hardif_put(primary_if);
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+ if (soft_iface)
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+ dev_put(soft_iface);
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+
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|
+ cb->args[0] = bucket;
|
|
|
+ cb->args[1] = idx;
|
|
|
+ cb->args[2] = sub;
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
/**
|
|
|
* _batadv_tt_global_del_orig_entry - remove and free an orig_entry
|
|
|
* @tt_global_entry: the global entry to remove the orig_entry from
|
Matthias Schiffer