In a lot of places, we use this kind of comparison to detect if a
device has a lower link:
dev->ifindex != dev_get_iflink(dev)
This seems to be a leftover of the pre-netns days, when the ifindex
was unique over the whole system. Nowadays, with network namespaces,
it's very easy to create a device with the same ifindex as its lower
link:
ip netns add main
ip netns add peer
ip -net main link add dummy0 type dummy
ip -net main link add link dummy0 macvlan0 netns peer type macvlan
ip -net main link show type dummy
9: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop ...
ip -net peer link show type macvlan
9: macvlan0@if9: <BROADCAST,MULTICAST> mtu 1500 qdisc noop ...
To detect if a device has a lower link, we can simply check the
existence of the dev->netdev_ops->ndo_get_iflink operation, instead of
checking its return value. In particular, I attempted to fix one of
these checks in commit feadc4b6cf42 ("rtnetlink: always put IFLA_LINK
for links with a link-netnsid"), but this patch isn't correct, since
tunnel devices can export IFLA_LINK_NETNSID without IFLA_LINK. That
patch needs to be reverted.
This series will fix all those bogus comparisons, and export missing
IFLA_LINK_NETNSID attributes in bridge and ipv6 dumps.
ipvlan and geneve are also missing the get_link_net operation, so
userspace can't know when those device are cross-netns. There are a
couple of other device types that have an ndo_get_iflink op but no
get_link_net (virt_wifi, ipoib), and should probably also have a
get_link_net.
Sabrina Dubroca (12):
ipvlan: add get_link_net
geneve: add get_link_net
Revert "rtnetlink: always put IFLA_LINK for links with a link-netnsid"
rtnetlink: always put IFLA_LINK for links with ndo_get_iflink
bridge: always put IFLA_LINK for ports with ndo_get_iflink
bridge: advertise IFLA_LINK_NETNSID when dumping bridge ports
ipv6: always put IFLA_LINK for devices with ndo_get_iflink
ipv6: advertise IFLA_LINK_NETNSID when dumping ipv6 addresses
net: link_watch: fix operstate when the link has the same index as the
device
net: link_watch: fix detection of urgent events
batman-adv: fix iflink detection in batadv_is_on_batman_iface
batman-adv: fix detection of lower link in batadv_get_real_netdevice
drivers/net/can/vxcan.c | 2 +-
drivers/net/geneve.c | 8 ++++++++
drivers/net/ipvlan/ipvlan_main.c | 9 +++++++++
drivers/net/veth.c | 2 +-
include/net/rtnetlink.h | 4 ++++
net/batman-adv/hard-interface.c | 4 ++--
net/bridge/br_netlink.c | 4 +++-
net/core/link_watch.c | 4 ++--
net/core/rtnetlink.c | 25 ++++++++++++-------------
net/ipv6/addrconf.c | 11 ++++++++++-
10 files changed, 52 insertions(+), 21 deletions(-)
--
2.28.0
Currently we schedule a broadcast packet like:
3x: [ [(re-)queue] --> for(hard-if): maybe-transmit ]
The intention of queueing a broadcast packet multiple times is to
increase robustness for wireless interfaces. However on interfaces
which we only broadcast on once the queueing induces an unnecessary
penalty. This patch restructures the queueing to be performed on a per
interface basis:
for(hard-if):
- transmit
- if wireless: [queue] --> transmit --> [requeue] --> transmit
Next to the performance benefits on non-wireless interfaces this
should also make it easier to apply alternative strategies for
transmissions on wireless interfaces in the future (for instance sending
via unicast transmissions on wireless interfaces, without queueing in
batman-adv, if appropriate).
Signed-off-by: Linus Lüssing <linus.luessing(a)c0d3.blue>
---
Changelog v3:
* changed all skb_clone() calls to skb_copy(), to move the
skb_copy()->skb_clone() changes to extra commits with their own
explanation
Changelog v2:
* fixed spelling of "unnecessary" in commit message (thanks Sven)
* removed now superflous kerneldoc for hard_iface in
batadv_forw_packet_bcasts_left() (thanks Sven)
* removed delay check for queued (re)broadcasts in
batadv_forw_bcast_packet_if(): the only case where a delay is set
for this function is for a delayed, DAT fallback ARP Request from
this node, then however num_bcasts will be >=1, too, and the fallback
ARP Request will be scheduled anyway
---
net/batman-adv/main.h | 1 -
net/batman-adv/routing.c | 9 +-
net/batman-adv/send.c | 374 +++++++++++++++++++++-----------
net/batman-adv/send.h | 12 +-
net/batman-adv/soft-interface.c | 12 +-
5 files changed, 270 insertions(+), 138 deletions(-)
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 8f0102b7..baa9fcbe 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -88,7 +88,6 @@
/* number of packets to send for broadcasts on different interface types */
#define BATADV_NUM_BCASTS_DEFAULT 1
#define BATADV_NUM_BCASTS_WIRELESS 3
-#define BATADV_NUM_BCASTS_MAX 3
/* length of the single packet used by the TP meter */
#define BATADV_TP_PACKET_LEN ETH_DATA_LEN
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 40f5cffd..bb9e93e3 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -1182,9 +1182,9 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
struct batadv_bcast_packet *bcast_packet;
struct ethhdr *ethhdr;
int hdr_size = sizeof(*bcast_packet);
- int ret = NET_RX_DROP;
s32 seq_diff;
u32 seqno;
+ int ret;
/* drop packet if it has not necessary minimum size */
if (unlikely(!pskb_may_pull(skb, hdr_size)))
@@ -1210,7 +1210,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
if (batadv_is_my_mac(bat_priv, bcast_packet->orig))
goto free_skb;
- if (bcast_packet->ttl < 2)
+ if (bcast_packet->ttl-- < 2)
goto free_skb;
orig_node = batadv_orig_hash_find(bat_priv, bcast_packet->orig);
@@ -1249,7 +1249,9 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
batadv_skb_set_priority(skb, sizeof(struct batadv_bcast_packet));
/* rebroadcast packet */
- batadv_add_bcast_packet_to_list(bat_priv, skb, 1, false);
+ ret = batadv_forw_bcast_packet(bat_priv, skb, 0, false);
+ if (ret == NETDEV_TX_BUSY)
+ goto free_skb;
/* don't hand the broadcast up if it is from an originator
* from the same backbone.
@@ -1275,6 +1277,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
spin_unlock_bh(&orig_node->bcast_seqno_lock);
free_skb:
kfree_skb(skb);
+ ret = NET_RX_DROP;
out:
if (orig_node)
batadv_orig_node_put(orig_node);
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 157abe92..07b0ba26 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -737,57 +737,48 @@ void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv,
}
/**
- * batadv_add_bcast_packet_to_list() - queue broadcast packet for multiple sends
+ * batadv_forw_bcast_packet_to_list() - queue broadcast packet for transmissions
* @bat_priv: the bat priv with all the soft interface information
* @skb: broadcast packet to add
* @delay: number of jiffies to wait before sending
* @own_packet: true if it is a self-generated broadcast packet
+ * @if_in: the interface where the packet was received on
+ * @if_out: the outgoing interface to queue on
*
- * add a broadcast packet to the queue and setup timers. broadcast packets
+ * Adds a broadcast packet to the queue and sets up timers. Broadcast packets
* are sent multiple times to increase probability for being received.
*
- * The skb is not consumed, so the caller should make sure that the
- * skb is freed.
- *
* Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY on errors.
*/
-int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
- const struct sk_buff *skb,
- unsigned long delay,
- bool own_packet)
+static int batadv_forw_bcast_packet_to_list(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned long delay,
+ bool own_packet,
+ struct batadv_hard_iface *if_in,
+ struct batadv_hard_iface *if_out)
{
- struct batadv_hard_iface *primary_if;
struct batadv_forw_packet *forw_packet;
- struct batadv_bcast_packet *bcast_packet;
+ unsigned long send_time = jiffies;
struct sk_buff *newskb;
- primary_if = batadv_primary_if_get_selected(bat_priv);
- if (!primary_if)
- goto err;
-
newskb = skb_copy(skb, GFP_ATOMIC);
- if (!newskb) {
- batadv_hardif_put(primary_if);
+ if (!newskb)
goto err;
- }
- forw_packet = batadv_forw_packet_alloc(primary_if, NULL,
+ forw_packet = batadv_forw_packet_alloc(if_in, if_out,
&bat_priv->bcast_queue_left,
bat_priv, newskb);
- batadv_hardif_put(primary_if);
if (!forw_packet)
goto err_packet_free;
- /* as we have a copy now, it is safe to decrease the TTL */
- bcast_packet = (struct batadv_bcast_packet *)newskb->data;
- bcast_packet->ttl--;
-
forw_packet->own = own_packet;
INIT_DELAYED_WORK(&forw_packet->delayed_work,
batadv_send_outstanding_bcast_packet);
- batadv_forw_packet_bcast_queue(bat_priv, forw_packet, jiffies + delay);
+ send_time += delay ? delay : msecs_to_jiffies(5);
+
+ batadv_forw_packet_bcast_queue(bat_priv, forw_packet, send_time);
return NETDEV_TX_OK;
err_packet_free:
@@ -796,10 +787,220 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
return NETDEV_TX_BUSY;
}
+/**
+ * batadv_forw_bcast_packet_if() - forward and queue a broadcast packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: broadcast packet to add
+ * @delay: number of jiffies to wait before sending
+ * @own_packet: true if it is a self-generated broadcast packet
+ * @if_in: the interface where the packet was received on
+ * @if_out: the outgoing interface to forward to
+ *
+ * Transmits a broadcast packet on the specified interface either immediately
+ * or if a delay is given after that. Furthermore, queues additional
+ * retransmissions if this interface is a wireless one.
+ *
+ * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY on errors.
+ */
+static int batadv_forw_bcast_packet_if(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned long delay,
+ bool own_packet,
+ struct batadv_hard_iface *if_in,
+ struct batadv_hard_iface *if_out)
+{
+ unsigned int num_bcasts = if_out->num_bcasts;
+ struct sk_buff *newskb;
+ int ret = NETDEV_TX_OK;
+
+ if (!delay) {
+ newskb = skb_copy(skb, GFP_ATOMIC);
+ if (!newskb)
+ return NETDEV_TX_BUSY;
+
+ batadv_send_broadcast_skb(newskb, if_out);
+ num_bcasts--;
+ }
+
+ /* delayed broadcast or rebroadcasts? */
+ if (num_bcasts >= 1) {
+ BATADV_SKB_CB(skb)->num_bcasts = num_bcasts;
+
+ ret = batadv_forw_bcast_packet_to_list(bat_priv, skb, delay,
+ own_packet, if_in,
+ if_out);
+ }
+
+ return ret;
+}
+
+/**
+ * batadv_send_no_broadcast() - check whether (re)broadcast is necessary
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: broadcast packet to check
+ * @own_packet: true if it is a self-generated broadcast packet
+ * @if_out: the outgoing interface checked and considered for (re)broadcast
+ *
+ * Return: False if a packet needs to be (re)broadcasted on the given interface,
+ * true otherwise.
+ */
+static bool batadv_send_no_broadcast(struct batadv_priv *bat_priv,
+ struct sk_buff *skb, bool own_packet,
+ struct batadv_hard_iface *if_out)
+{
+ struct batadv_hardif_neigh_node *neigh_node = NULL;
+ struct batadv_bcast_packet *bcast_packet;
+ u8 *orig_neigh;
+ u8 *neigh_addr;
+ char *type;
+ int ret;
+
+ if (!own_packet) {
+ neigh_addr = eth_hdr(skb)->h_source;
+ neigh_node = batadv_hardif_neigh_get(if_out,
+ neigh_addr);
+ }
+
+ bcast_packet = (struct batadv_bcast_packet *)skb->data;
+ orig_neigh = neigh_node ? neigh_node->orig : NULL;
+
+ ret = batadv_hardif_no_broadcast(if_out, bcast_packet->orig,
+ orig_neigh);
+
+ if (neigh_node)
+ batadv_hardif_neigh_put(neigh_node);
+
+ /* ok, may broadcast */
+ if (!ret)
+ return false;
+
+ /* no broadcast */
+ switch (ret) {
+ case BATADV_HARDIF_BCAST_NORECIPIENT:
+ type = "no neighbor";
+ break;
+ case BATADV_HARDIF_BCAST_DUPFWD:
+ type = "single neighbor is source";
+ break;
+ case BATADV_HARDIF_BCAST_DUPORIG:
+ type = "single neighbor is originator";
+ break;
+ default:
+ type = "unknown";
+ }
+
+ batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
+ "BCAST packet from orig %pM on %s suppressed: %s\n",
+ bcast_packet->orig,
+ if_out->net_dev->name, type);
+
+ return true;
+}
+
+/**
+ * __batadv_forw_bcast_packet() - forward and queue a broadcast packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: broadcast packet to add
+ * @delay: number of jiffies to wait before sending
+ * @own_packet: true if it is a self-generated broadcast packet
+ *
+ * Transmits a broadcast packet either immediately or if a delay is given
+ * after that. Furthermore, queues additional retransmissions on wireless
+ * interfaces.
+ *
+ * This call clones the given skb, hence the caller needs to take into
+ * account that the data segment of the given skb might not be
+ * modifiable anymore.
+ *
+ * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY on errors.
+ */
+static int __batadv_forw_bcast_packet(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned long delay,
+ bool own_packet)
+{
+ struct batadv_hard_iface *hard_iface;
+ struct batadv_hard_iface *primary_if;
+ int ret = NETDEV_TX_OK;
+
+ primary_if = batadv_primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ return NETDEV_TX_BUSY;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
+ if (hard_iface->soft_iface != bat_priv->soft_iface)
+ continue;
+
+ if (!kref_get_unless_zero(&hard_iface->refcount))
+ continue;
+
+ if (batadv_send_no_broadcast(bat_priv, skb, own_packet,
+ hard_iface)) {
+ batadv_hardif_put(hard_iface);
+ continue;
+ }
+
+ ret = batadv_forw_bcast_packet_if(bat_priv, skb, delay,
+ own_packet, primary_if,
+ hard_iface);
+ batadv_hardif_put(hard_iface);
+
+ if (ret == NETDEV_TX_BUSY)
+ break;
+ }
+ rcu_read_unlock();
+
+ batadv_hardif_put(primary_if);
+ return ret;
+}
+
+/**
+ * batadv_forw_bcast_packet() - forward and queue a broadcast packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: broadcast packet to add
+ * @delay: number of jiffies to wait before sending
+ * @own_packet: true if it is a self-generated broadcast packet
+ *
+ * Transmits a broadcast packet either immediately or if a delay is given
+ * after that. Furthermore, queues additional retransmissions on wireless
+ * interfaces.
+ *
+ * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY on errors.
+ */
+int batadv_forw_bcast_packet(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned long delay,
+ bool own_packet)
+{
+ return __batadv_forw_bcast_packet(bat_priv, skb, delay, own_packet);
+}
+
+/**
+ * batadv_send_bcast_packet() - send and queue a broadcast packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: broadcast packet to add
+ * @delay: number of jiffies to wait before sending
+ * @own_packet: true if it is a self-generated broadcast packet
+ *
+ * Transmits a broadcast packet either immediately or if a delay is given
+ * after that. Furthermore, queues additional retransmissions on wireless
+ * interfaces.
+ *
+ * Consumes the provided skb.
+ */
+void batadv_send_bcast_packet(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned long delay,
+ bool own_packet)
+{
+ __batadv_forw_bcast_packet(bat_priv, skb, delay, own_packet);
+ consume_skb(skb);
+}
+
/**
* batadv_forw_packet_bcasts_left() - check if a retransmission is necessary
* @forw_packet: the forwarding packet to check
- * @hard_iface: the interface to check on
*
* Checks whether a given packet has any (re)transmissions left on the provided
* interface.
@@ -811,28 +1012,20 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
* Return: True if (re)transmissions are left, false otherwise.
*/
static bool
-batadv_forw_packet_bcasts_left(struct batadv_forw_packet *forw_packet,
- struct batadv_hard_iface *hard_iface)
+batadv_forw_packet_bcasts_left(struct batadv_forw_packet *forw_packet)
{
- unsigned int max;
-
- if (hard_iface)
- max = hard_iface->num_bcasts;
- else
- max = BATADV_NUM_BCASTS_MAX;
-
- return BATADV_SKB_CB(forw_packet->skb)->num_bcasts < max;
+ return BATADV_SKB_CB(forw_packet->skb)->num_bcasts;
}
/**
- * batadv_forw_packet_bcasts_inc() - increment retransmission counter of a
+ * batadv_forw_packet_bcasts_dec() - decrement retransmission counter of a
* packet
- * @forw_packet: the packet to increase the counter for
+ * @forw_packet: the packet to decrease the counter for
*/
static void
-batadv_forw_packet_bcasts_inc(struct batadv_forw_packet *forw_packet)
+batadv_forw_packet_bcasts_dec(struct batadv_forw_packet *forw_packet)
{
- BATADV_SKB_CB(forw_packet->skb)->num_bcasts++;
+ BATADV_SKB_CB(forw_packet->skb)->num_bcasts--;
}
/**
@@ -843,30 +1036,30 @@ batadv_forw_packet_bcasts_inc(struct batadv_forw_packet *forw_packet)
*/
bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet)
{
- return BATADV_SKB_CB(forw_packet->skb)->num_bcasts > 0;
+ unsigned char num_bcasts = BATADV_SKB_CB(forw_packet->skb)->num_bcasts;
+
+ return num_bcasts != forw_packet->if_outgoing->num_bcasts;
}
+/**
+ * batadv_send_outstanding_bcast_packet() - transmit a queued broadcast packet
+ * @work: work queue item
+ *
+ * Transmits a queued broadcast packet and if necessary reschedules it.
+ */
static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
{
- struct batadv_hard_iface *hard_iface;
- struct batadv_hardif_neigh_node *neigh_node;
+ unsigned long send_time = jiffies + msecs_to_jiffies(5);
+ struct batadv_forw_packet *forw_packet;
struct delayed_work *delayed_work;
- struct batadv_forw_packet *forw_packet;
- struct batadv_bcast_packet *bcast_packet;
+ struct batadv_priv *bat_priv;
struct sk_buff *skb1;
- struct net_device *soft_iface;
- struct batadv_priv *bat_priv;
- unsigned long send_time = jiffies + msecs_to_jiffies(5);
bool dropped = false;
- u8 *neigh_addr;
- u8 *orig_neigh;
- int ret = 0;
delayed_work = to_delayed_work(work);
forw_packet = container_of(delayed_work, struct batadv_forw_packet,
delayed_work);
- soft_iface = forw_packet->if_incoming->soft_iface;
- bat_priv = netdev_priv(soft_iface);
+ bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface);
if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) {
dropped = true;
@@ -878,76 +1071,15 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
goto out;
}
- bcast_packet = (struct batadv_bcast_packet *)forw_packet->skb->data;
+ /* send a copy of the saved skb */
+ skb1 = skb_copy(forw_packet->skb, GFP_ATOMIC);
+ if (!skb1)
+ goto out;
- /* rebroadcast packet */
- rcu_read_lock();
- list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
- if (hard_iface->soft_iface != soft_iface)
- continue;
+ batadv_send_broadcast_skb(skb1, forw_packet->if_outgoing);
+ batadv_forw_packet_bcasts_dec(forw_packet);
- if (!batadv_forw_packet_bcasts_left(forw_packet, hard_iface))
- continue;
-
- if (forw_packet->own) {
- neigh_node = NULL;
- } else {
- neigh_addr = eth_hdr(forw_packet->skb)->h_source;
- neigh_node = batadv_hardif_neigh_get(hard_iface,
- neigh_addr);
- }
-
- orig_neigh = neigh_node ? neigh_node->orig : NULL;
-
- ret = batadv_hardif_no_broadcast(hard_iface, bcast_packet->orig,
- orig_neigh);
-
- if (ret) {
- char *type;
-
- switch (ret) {
- case BATADV_HARDIF_BCAST_NORECIPIENT:
- type = "no neighbor";
- break;
- case BATADV_HARDIF_BCAST_DUPFWD:
- type = "single neighbor is source";
- break;
- case BATADV_HARDIF_BCAST_DUPORIG:
- type = "single neighbor is originator";
- break;
- default:
- type = "unknown";
- }
-
- batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "BCAST packet from orig %pM on %s suppressed: %s\n",
- bcast_packet->orig,
- hard_iface->net_dev->name, type);
-
- if (neigh_node)
- batadv_hardif_neigh_put(neigh_node);
-
- continue;
- }
-
- if (neigh_node)
- batadv_hardif_neigh_put(neigh_node);
-
- if (!kref_get_unless_zero(&hard_iface->refcount))
- continue;
-
- /* send a copy of the saved skb */
- skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC);
- if (skb1)
- batadv_send_broadcast_skb(skb1, hard_iface);
-
- batadv_hardif_put(hard_iface);
- }
- rcu_read_unlock();
-
- batadv_forw_packet_bcasts_inc(forw_packet);
-
- /* if we still have some more bcasts to send */
- if (batadv_forw_packet_bcasts_left(forw_packet, NULL)) {
+ if (batadv_forw_packet_bcasts_left(forw_packet)) {
batadv_forw_packet_bcast_queue(bat_priv, forw_packet,
send_time);
return;
diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h
index 2b0daf8b..08af251b 100644
--- a/net/batman-adv/send.h
+++ b/net/batman-adv/send.h
@@ -39,10 +39,14 @@ int batadv_send_broadcast_skb(struct sk_buff *skb,
struct batadv_hard_iface *hard_iface);
int batadv_send_unicast_skb(struct sk_buff *skb,
struct batadv_neigh_node *neigh_node);
-int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
- const struct sk_buff *skb,
- unsigned long delay,
- bool own_packet);
+int batadv_forw_bcast_packet(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned long delay,
+ bool own_packet);
+void batadv_send_bcast_packet(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned long delay,
+ bool own_packet);
void
batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
const struct batadv_hard_iface *hard_iface);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 6b8181bc..a21884c0 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -191,7 +191,7 @@ static netdev_tx_t batadv_interface_tx(struct sk_buff *skb,
struct vlan_ethhdr *vhdr;
unsigned int header_len = 0;
int data_len = skb->len, ret;
- unsigned long brd_delay = 1;
+ unsigned long brd_delay = 0;
bool do_bcast = false, client_added;
unsigned short vid;
u32 seqno;
@@ -330,7 +330,7 @@ static netdev_tx_t batadv_interface_tx(struct sk_buff *skb,
bcast_packet = (struct batadv_bcast_packet *)skb->data;
bcast_packet->version = BATADV_COMPAT_VERSION;
- bcast_packet->ttl = BATADV_TTL;
+ bcast_packet->ttl = BATADV_TTL - 1;
/* batman packet type: broadcast */
bcast_packet->packet_type = BATADV_BCAST;
@@ -346,13 +346,7 @@ static netdev_tx_t batadv_interface_tx(struct sk_buff *skb,
seqno = atomic_inc_return(&bat_priv->bcast_seqno);
bcast_packet->seqno = htonl(seqno);
- batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay, true);
-
- /* a copy is stored in the bcast list, therefore removing
- * the original skb.
- */
- consume_skb(skb);
-
+ batadv_send_bcast_packet(bat_priv, skb, brd_delay, true);
/* unicast packet */
} else {
/* DHCP packets going to a server will use the GW feature */
--
2.31.0
Sparse will try to check casting of simple integer types which are marked
as __bitwise. This for example "disallows" simple casting of __be{16,32,64}
or __le{16,32,64} to other types. This is also true for pointers to
variables with this type.
But the new generic {get,put}_unaligned is doing that by (reinterpret)
casting the original pointer to a new (anonymous) struct pointer. This will
then create warnings like:
net/batman-adv/distributed-arp-table.c:1461:19: warning: cast from restricted __be32 *
net/batman-adv/distributed-arp-table.c:1510:23: warning: cast from restricted __be32 [usertype] *[assigned] magic
net/batman-adv/distributed-arp-table.c:1588:24: warning: cast from restricted __be32 [usertype] *[assigned] yiaddr
The special attribute force must be used in such statements when the cast
is known to be safe to avoid these warnings.
Fixes: 803f4e1eab7a ("asm-generic: simplify asm/unaligned.h")
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
---
include/asm-generic/unaligned.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
index 1c4242416c9f..e2b23e5bf945 100644
--- a/include/asm-generic/unaligned.h
+++ b/include/asm-generic/unaligned.h
@@ -10,12 +10,13 @@
#include <asm/byteorder.h>
#define __get_unaligned_t(type, ptr) ({ \
- const struct { type x; } __packed *__pptr = (typeof(__pptr))(ptr); \
+ const struct { type x; } __packed *__pptr; \
+ __pptr = (__force typeof(__pptr))(ptr); \
__pptr->x; \
})
#define __put_unaligned_t(type, val, ptr) do { \
- struct { type x; } __packed *__pptr = (typeof(__pptr))(ptr); \
+ struct { type x; } __packed *__pptr = (__force typeof(__pptr))(ptr); \
__pptr->x = (val); \
} while (0)
--
2.30.2
Hi,
I went through the manpage and tried to clean up the structure of the manpage.
This should make it easier for add new entries to the manpage when subcommands
are added. But also to have a slightly better impression when trying to look
something up in the manpage.
As said, this is mostly about the the structure and not about the texts. So
if anyone wants to improve them too: feel free to submit patches.
Kind regards,
Sven
Sven Eckelmann (9):
batctl: man: Fix alignment after json list
batctl: man: Move commands to own section
batctl: man: Convert lists to indented paragraph
batctl: man: Use native list support
batctl: man: Use tbl groff preprocessor for tables
batctl: man: Switch to manpage font convention
batctl: man: Add example section
batctl: man: Reorder and restructure sections
batctl: man: Rewrite SEE ALSO list
man/batctl.8 | 619 ++++++++++++++++++++++++++++-----------------------
1 file changed, 337 insertions(+), 282 deletions(-)
--
2.30.2