The batman-adv codebase is using "list" for the list node (prev/next) and
<list content descriptor>+"_list" for the head of a list. Not using this
naming scheme can up in confusions because list_head is used for both the
head of the list and the list node (prev/next) in each item of the list.
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
---
net/batman-adv/fragmentation.c | 14 +++++++-------
net/batman-adv/fragmentation.h | 2 +-
net/batman-adv/originator.c | 2 +-
net/batman-adv/types.h | 6 +++---
4 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index 0934730..f725918 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -73,7 +73,7 @@ void batadv_frag_purge_orig(struct batadv_orig_node *orig_node,
spin_lock_bh(&chain->lock);
if (!check_cb || check_cb(chain)) {
- batadv_frag_clear_chain(&chain->head);
+ batadv_frag_clear_chain(&chain->fragment_list);
chain->size = 0;
}
@@ -117,8 +117,8 @@ static bool batadv_frag_init_chain(struct batadv_frag_table_entry *chain,
if (chain->seqno == seqno)
return false;
- if (!hlist_empty(&chain->head))
- batadv_frag_clear_chain(&chain->head);
+ if (!hlist_empty(&chain->fragment_list))
+ batadv_frag_clear_chain(&chain->fragment_list);
chain->size = 0;
chain->seqno = seqno;
@@ -176,7 +176,7 @@ static bool batadv_frag_insert_packet(struct batadv_orig_node *orig_node,
chain = &orig_node->fragments[bucket];
spin_lock_bh(&chain->lock);
if (batadv_frag_init_chain(chain, seqno)) {
- hlist_add_head(&frag_entry_new->list, &chain->head);
+ hlist_add_head(&frag_entry_new->list, &chain->fragment_list);
chain->size = skb->len - hdr_size;
chain->timestamp = jiffies;
chain->total_size = ntohs(frag_packet->total_size);
@@ -185,7 +185,7 @@ static bool batadv_frag_insert_packet(struct batadv_orig_node *orig_node,
}
/* Find the position for the new fragment. */
- hlist_for_each_entry(frag_entry_curr, &chain->head, list) {
+ hlist_for_each_entry(frag_entry_curr, &chain->fragment_list, list) {
/* Drop packet if fragment already exists. */
if (frag_entry_curr->no == frag_entry_new->no)
goto err_unlock;
@@ -220,11 +220,11 @@ out:
* exceeds the maximum size of one merged packet. Don't allow
* packets to have different total_size.
*/
- batadv_frag_clear_chain(&chain->head);
+ batadv_frag_clear_chain(&chain->fragment_list);
chain->size = 0;
} else if (ntohs(frag_packet->total_size) == chain->size) {
/* All fragments received. Hand over chain to caller. */
- hlist_move_list(&chain->head, chain_out);
+ hlist_move_list(&chain->fragment_list, chain_out);
chain->size = 0;
}
diff --git a/net/batman-adv/fragmentation.h b/net/batman-adv/fragmentation.h
index 3202fe3..b95f619 100644
--- a/net/batman-adv/fragmentation.h
+++ b/net/batman-adv/fragmentation.h
@@ -47,7 +47,7 @@ int batadv_frag_send_packet(struct sk_buff *skb,
static inline bool
batadv_frag_check_entry(struct batadv_frag_table_entry *frags_entry)
{
- if (!hlist_empty(&frags_entry->head) &&
+ if (!hlist_empty(&frags_entry->fragment_list) &&
batadv_has_timed_out(frags_entry->timestamp, BATADV_FRAG_TIMEOUT))
return true;
return false;
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 5f3bfc4..c6e07d6 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -1021,7 +1021,7 @@ struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
batadv_orig_node_vlan_put(vlan);
for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) {
- INIT_HLIST_HEAD(&orig_node->fragments[i].head);
+ INIT_HLIST_HEAD(&orig_node->fragments[i].fragment_list);
spin_lock_init(&orig_node->fragments[i].lock);
orig_node->fragments[i].size = 0;
}
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index b3dd1a3..02d1d32 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -184,7 +184,7 @@ struct batadv_orig_ifinfo {
/**
* struct batadv_frag_table_entry - head in the fragment buffer table
- * @head: head of list with fragments
+ * @fragment_list: head of list with fragments
* @lock: lock to protect the list of fragments
* @timestamp: time (jiffie) of last received fragment
* @seqno: sequence number of the fragments in the list
@@ -192,8 +192,8 @@ struct batadv_orig_ifinfo {
* @total_size: expected size of the assembled packet
*/
struct batadv_frag_table_entry {
- struct hlist_head head;
- spinlock_t lock; /* protects head */
+ struct hlist_head fragment_list;
+ spinlock_t lock; /* protects fragment_list */
unsigned long timestamp;
u16 seqno;
u16 size;
--
2.8.1
From: Markus Elfring <elfring(a)users.sourceforge.net>
Date: Tue, 3 Nov 2015 21:34:29 +0100
Further update suggestions were taken into account after a patch
was applied from static source code analysis.
Markus Elfring (3):
Delete an unnecessary check before the function call "batadv_softif_vlan_free_ref"
Split a condition check
Less function calls in batadv_is_ap_isolated() after error detection
net/batman-adv/translation-table.c | 29 ++++++++++++++---------------
1 file changed, 14 insertions(+), 15 deletions(-)
--
2.6.2
Hi,
The current endpoint for batadv_icmp* is implemented in the kernel module and
can be accessed via debugfs. But the debugfs cannot be accessed from non-
default netns or when debugfs is disabled. Thus it has be possible to use it
via the netlink infrastructure to make it compatible with future
setups.
The use of the socket file is completely removed and instead raw sockets with
BPF filters are used to send/receive batadv_icmp_packet* directly. All
information about interfaces and available originators are received via
rtnetlink and the batman-adv netlink.
The originators debugfs file is used when the batman-adv netlink commands are
not available. The routing of batadv_icmp_packets is still done inside the
kernel module.
The patchset is based on the netlink and rtnl patchset for batctl.
Kind regards,
Sven
Sven Eckelmann (4):
batctl: Replace list implementation with linux-like-list
batctl: Use monotonic time source for icmp timing
batctl: Add helper to generate instant random bytes
batctl: Implement non-routing batadv_icmp in userspace
Makefile | 4 +-
bisect_iv.c | 40 ++-
bisect_iv.h | 10 +-
functions.c | 82 +++++-
functions.h | 2 +
icmp_helper.c | 633 ++++++++++++++++++++++++++++++++++++++++++++
icmp_helper.h | 58 ++++
list-batman.c | 123 ---------
list-batman.h | 120 ---------
list.h | 834 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
netlink.c | 178 ++++++++++++-
netlink.h | 3 +
ping.c | 42 +--
tcpdump.c | 7 +-
tcpdump.h | 2 +-
traceroute.c | 42 +--
16 files changed, 1832 insertions(+), 348 deletions(-)
create mode 100644 icmp_helper.c
create mode 100644 icmp_helper.h
delete mode 100644 list-batman.c
delete mode 100644 list-batman.h
create mode 100644 list.h
The ELP protocol requires cfg80211 to auto-detect the WiFi througput
to a given neighbor. Use batadv_is_cfg80211_netdev() to determine
whether or not an interface is eligible.
Signed-off-by: Marek Lindner <mareklindner(a)neomailbox.ch>
---
net/batman-adv/bat_v_elp.c | 29 ++++++++++++++---------------
net/batman-adv/hard-interface.c | 26 +++++++++++++++++++++-----
net/batman-adv/hard-interface.h | 1 +
3 files changed, 36 insertions(+), 20 deletions(-)
diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c
index 7d17001..51fc08d 100644
--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -90,22 +90,21 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh)
* cfg80211 API
*/
if (batadv_is_wifi_netdev(hard_iface->net_dev)) {
- if (hard_iface->net_dev->ieee80211_ptr) {
- ret = cfg80211_get_station(hard_iface->net_dev,
- neigh->addr, &sinfo);
- if (ret == -ENOENT) {
- /* Node is not associated anymore! It would be
- * possible to delete this neighbor. For now set
- * the throughput metric to 0.
- */
- return 0;
- }
- if (!ret)
- return sinfo.expected_throughput / 100;
+ if (!batadv_is_cfg80211_netdev(hard_iface->net_dev))
+ /* unsupported WiFi driver version */
+ goto default_throughput;
+
+ ret = cfg80211_get_station(hard_iface->net_dev,
+ neigh->addr, &sinfo);
+ if (ret == -ENOENT) {
+ /* Node is not associated anymore! It would be
+ * possible to delete this neighbor. For now set
+ * the throughput metric to 0.
+ */
+ return 0;
}
-
- /* unsupported WiFi driver version */
- goto default_throughput;
+ if (!ret)
+ return sinfo.expected_throughput / 100;
}
/* if not a wifi interface, check if this device provides data via
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 714af8e..478977b 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -166,6 +166,26 @@ static bool batadv_is_valid_iface(const struct net_device *net_dev)
}
/**
+ * batadv_is_cfg80211_netdev - check if the given net_device struct is a
+ * cfg80211 wifi interface
+ * @net_device: the device to check
+ *
+ * Return: true if the net device is a cfg80211 wireless device, false
+ * otherwise.
+ */
+bool batadv_is_cfg80211_netdev(struct net_device *net_device)
+{
+ if (!net_device)
+ return false;
+
+ /* cfg80211 drivers have to set ieee80211_ptr */
+ if (net_device->ieee80211_ptr)
+ return true;
+
+ return false;
+}
+
+/**
* batadv_is_wifi_netdev - check if the given net_device struct is a wifi
* interface
* @net_device: the device to check
@@ -185,11 +205,7 @@ bool batadv_is_wifi_netdev(struct net_device *net_device)
return true;
#endif
- /* cfg80211 drivers have to set ieee80211_ptr */
- if (net_device->ieee80211_ptr)
- return true;
-
- return false;
+ return batadv_is_cfg80211_netdev(net_device);
}
static struct batadv_hard_iface *
diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h
index a76724d..e0893de 100644
--- a/net/batman-adv/hard-interface.h
+++ b/net/batman-adv/hard-interface.h
@@ -51,6 +51,7 @@ enum batadv_hard_if_cleanup {
extern struct notifier_block batadv_hard_if_notifier;
+bool batadv_is_cfg80211_netdev(struct net_device *net_device);
bool batadv_is_wifi_netdev(struct net_device *net_device);
bool batadv_is_wifi_iface(int ifindex);
struct batadv_hard_iface*
--
2.8.0.rc3