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authorDavid S. Miller <davem@davemloft.net>2016-05-10 23:36:14 -0400
committerDavid S. Miller <davem@davemloft.net>2016-05-10 23:36:14 -0400
commitcf88585b1d5ce49515aabb381812976e2840a967 (patch)
treee878f445261d1d28c53660c580d3d6d47aac565e /net
parent953abb3823633385b1235add9c30c3e775dee0bc (diff)
parent676970e55b1033af7f0a03d4037b4d9b76327ded (diff)
Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge
Antonio Quartulli says: ==================== Included changes: - remove useless skb size check in batadv_interface_rx - basic netns support introduced by Andrew Lunn: - prevent virtual interface from changing netns by setting NETIF_F_NETNS_LOCAL - create virtual interface within the netns of the first hard-interface - introduce detection of complex bridge loops and report event to the user (via udev) when the Bridge Loop Avoidance mechanism can't prevent them - minor reference counting bugfixes for the hard_iface object that couldn't make it via the net tree - use kref_get() instead of kref_get_unless_zero() to make reference counting bug more visible - use batadv_compare_eth() all over the code when possible instead of plain memcmp() - minor code cleanup and style adjustments ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/batman-adv/bat_iv_ogm.c48
-rw-r--r--net/batman-adv/bat_v_ogm.c14
-rw-r--r--net/batman-adv/bitarray.c16
-rw-r--r--net/batman-adv/bitarray.h15
-rw-r--r--net/batman-adv/bridge_loop_avoidance.c314
-rw-r--r--net/batman-adv/bridge_loop_avoidance.h43
-rw-r--r--net/batman-adv/debugfs.c2
-rw-r--r--net/batman-adv/distributed-arp-table.c6
-rw-r--r--net/batman-adv/gateway_client.c12
-rw-r--r--net/batman-adv/hard-interface.c34
-rw-r--r--net/batman-adv/hard-interface.h3
-rw-r--r--net/batman-adv/hash.h6
-rw-r--r--net/batman-adv/main.c18
-rw-r--r--net/batman-adv/main.h6
-rw-r--r--net/batman-adv/network-coding.c25
-rw-r--r--net/batman-adv/originator.c39
-rw-r--r--net/batman-adv/originator.h2
-rw-r--r--net/batman-adv/packet.h1
-rw-r--r--net/batman-adv/routing.c50
-rw-r--r--net/batman-adv/routing.h6
-rw-r--r--net/batman-adv/send.c6
-rw-r--r--net/batman-adv/soft-interface.c32
-rw-r--r--net/batman-adv/soft-interface.h10
-rw-r--r--net/batman-adv/sysfs.c9
-rw-r--r--net/batman-adv/translation-table.c35
-rw-r--r--net/batman-adv/types.h8
26 files changed, 465 insertions, 295 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 8c1710bba803..7f98a9d39883 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -681,18 +681,12 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
unsigned char *skb_buff;
unsigned int skb_size;
- if (!kref_get_unless_zero(&if_incoming->refcount))
- return;
-
- if (!kref_get_unless_zero(&if_outgoing->refcount))
- goto out_free_incoming;
-
/* own packet should always be scheduled */
if (!own_packet) {
if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"batman packet queue full\n");
- goto out_free_outgoing;
+ return;
}
}
@@ -718,6 +712,8 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
forw_packet_aggr->packet_len = packet_len;
memcpy(skb_buff, packet_buff, packet_len);
+ kref_get(&if_incoming->refcount);
+ kref_get(&if_outgoing->refcount);
forw_packet_aggr->own = own_packet;
forw_packet_aggr->if_incoming = if_incoming;
forw_packet_aggr->if_outgoing = if_outgoing;
@@ -747,10 +743,6 @@ out_free_forw_packet:
out_nomem:
if (!own_packet)
atomic_inc(&bat_priv->batman_queue_left);
-out_free_outgoing:
- batadv_hardif_put(if_outgoing);
-out_free_incoming:
- batadv_hardif_put(if_incoming);
}
/* aggregate a new packet into the existing ogm packet */
@@ -987,9 +979,15 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface)
list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) {
if (tmp_hard_iface->soft_iface != hard_iface->soft_iface)
continue;
+
+ if (!kref_get_unless_zero(&tmp_hard_iface->refcount))
+ continue;
+
batadv_iv_ogm_queue_add(bat_priv, *ogm_buff,
*ogm_buff_len, hard_iface,
tmp_hard_iface, 1, send_time);
+
+ batadv_hardif_put(tmp_hard_iface);
}
rcu_read_unlock();
@@ -1170,13 +1168,13 @@ out:
* @if_incoming: interface where the packet was received
* @if_outgoing: interface for which the retransmission should be considered
*
- * Return: 1 if the link can be considered bidirectional, 0 otherwise
+ * Return: true if the link can be considered bidirectional, false otherwise
*/
-static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node,
- struct batadv_orig_node *orig_neigh_node,
- struct batadv_ogm_packet *batadv_ogm_packet,
- struct batadv_hard_iface *if_incoming,
- struct batadv_hard_iface *if_outgoing)
+static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node,
+ struct batadv_orig_node *orig_neigh_node,
+ struct batadv_ogm_packet *batadv_ogm_packet,
+ struct batadv_hard_iface *if_incoming,
+ struct batadv_hard_iface *if_outgoing)
{
struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node;
@@ -1184,9 +1182,10 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node,
u8 total_count;
u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own;
unsigned int neigh_rq_inv_cube, neigh_rq_max_cube;
- int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0;
+ int tq_asym_penalty, inv_asym_penalty, if_num;
unsigned int combined_tq;
int tq_iface_penalty;
+ bool ret = false;
/* find corresponding one hop neighbor */
rcu_read_lock();
@@ -1298,7 +1297,7 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node,
* consider it bidirectional
*/
if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT)
- ret = 1;
+ ret = true;
out:
if (neigh_node)
@@ -1327,9 +1326,9 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
struct batadv_orig_ifinfo *orig_ifinfo = NULL;
struct batadv_neigh_node *neigh_node;
struct batadv_neigh_ifinfo *neigh_ifinfo;
- int is_dup;
+ bool is_dup;
s32 seq_diff;
- int need_update = 0;
+ bool need_update = false;
int set_mark;
enum batadv_dup_status ret = BATADV_NO_DUP;
u32 seqno = ntohl(batadv_ogm_packet->seqno);
@@ -1439,7 +1438,7 @@ batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset,
struct sk_buff *skb_priv;
struct ethhdr *ethhdr;
u8 *prev_sender;
- int is_bidirect;
+ bool is_bidirect;
/* create a private copy of the skb, as some functions change tq value
* and/or flags.
@@ -1767,8 +1766,13 @@ static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset,
if (hard_iface->soft_iface != bat_priv->soft_iface)
continue;
+ if (!kref_get_unless_zero(&hard_iface->refcount))
+ continue;
+
batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node,
if_incoming, hard_iface);
+
+ batadv_hardif_put(hard_iface);
}
rcu_read_unlock();
diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c
index 4155fa57cf6d..473ebb9a0e73 100644
--- a/net/batman-adv/bat_v_ogm.c
+++ b/net/batman-adv/bat_v_ogm.c
@@ -26,6 +26,7 @@
#include <linux/if_ether.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
+#include <linux/kref.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/random.h>
@@ -176,6 +177,9 @@ static void batadv_v_ogm_send(struct work_struct *work)
if (hard_iface->soft_iface != bat_priv->soft_iface)
continue;
+ if (!kref_get_unless_zero(&hard_iface->refcount))
+ continue;
+
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Sending own OGM2 packet (originator %pM, seqno %u, throughput %u, TTL %d) on interface %s [%pM]\n",
ogm_packet->orig, ntohl(ogm_packet->seqno),
@@ -185,10 +189,13 @@ static void batadv_v_ogm_send(struct work_struct *work)
/* this skb gets consumed by batadv_v_ogm_send_to_if() */
skb_tmp = skb_clone(skb, GFP_ATOMIC);
- if (!skb_tmp)
+ if (!skb_tmp) {
+ batadv_hardif_put(hard_iface);
break;
+ }
batadv_v_ogm_send_to_if(skb_tmp, hard_iface);
+ batadv_hardif_put(hard_iface);
}
rcu_read_unlock();
@@ -704,9 +711,14 @@ static void batadv_v_ogm_process(const struct sk_buff *skb, int ogm_offset,
if (hard_iface->soft_iface != bat_priv->soft_iface)
continue;
+ if (!kref_get_unless_zero(&hard_iface->refcount))
+ continue;
+
batadv_v_ogm_process_per_outif(bat_priv, ethhdr, ogm_packet,
orig_node, neigh_node,
if_incoming, hard_iface);
+
+ batadv_hardif_put(hard_iface);
}
rcu_read_unlock();
out:
diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c
index b56bb000a0ab..a0c7913837a5 100644
--- a/net/batman-adv/bitarray.c
+++ b/net/batman-adv/bitarray.c
@@ -38,11 +38,11 @@ static void batadv_bitmap_shift_left(unsigned long *seq_bits, s32 n)
* the last sequence number
* @set_mark: whether this packet should be marked in seq_bits
*
- * Return: 1 if the window was moved (either new or very old),
- * 0 if the window was not moved/shifted.
+ * Return: true if the window was moved (either new or very old),
+ * false if the window was not moved/shifted.
*/
-int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, s32 seq_num_diff,
- int set_mark)
+bool batadv_bit_get_packet(void *priv, unsigned long *seq_bits,
+ s32 seq_num_diff, int set_mark)
{
struct batadv_priv *bat_priv = priv;
@@ -52,7 +52,7 @@ int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, s32 seq_num_diff,
if (seq_num_diff <= 0 && seq_num_diff > -BATADV_TQ_LOCAL_WINDOW_SIZE) {
if (set_mark)
batadv_set_bit(seq_bits, -seq_num_diff);
- return 0;
+ return false;
}
/* sequence number is slightly newer, so we shift the window and
@@ -63,7 +63,7 @@ int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, s32 seq_num_diff,
if (set_mark)
batadv_set_bit(seq_bits, 0);
- return 1;
+ return true;
}
/* sequence number is much newer, probably missed a lot of packets */
@@ -75,7 +75,7 @@ int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, s32 seq_num_diff,
bitmap_zero(seq_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
if (set_mark)
batadv_set_bit(seq_bits, 0);
- return 1;
+ return true;
}
/* received a much older packet. The other host either restarted
@@ -94,5 +94,5 @@ int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, s32 seq_num_diff,
if (set_mark)
batadv_set_bit(seq_bits, 0);
- return 1;
+ return true;
}
diff --git a/net/batman-adv/bitarray.h b/net/batman-adv/bitarray.h
index 3e41bb80eb81..0e6e9d09078c 100644
--- a/net/batman-adv/bitarray.h
+++ b/net/batman-adv/bitarray.h
@@ -22,6 +22,7 @@
#include <linux/bitops.h>
#include <linux/compiler.h>
+#include <linux/stddef.h>
#include <linux/types.h>
/**
@@ -31,17 +32,17 @@
* @last_seqno: latest sequence number in seq_bits
* @curr_seqno: sequence number to test for
*
- * Return: 1 if the corresponding bit in the given seq_bits indicates true
- * and curr_seqno is within range of last_seqno. Otherwise returns 0.
+ * Return: true if the corresponding bit in the given seq_bits indicates true
+ * and curr_seqno is within range of last_seqno. Otherwise returns false.
*/
-static inline int batadv_test_bit(const unsigned long *seq_bits,
- u32 last_seqno, u32 curr_seqno)
+static inline bool batadv_test_bit(const unsigned long *seq_bits,
+ u32 last_seqno, u32 curr_seqno)
{
s32 diff;
diff = last_seqno - curr_seqno;
if (diff < 0 || diff >= BATADV_TQ_LOCAL_WINDOW_SIZE)
- return 0;
+ return false;
return test_bit(diff, seq_bits) != 0;
}
@@ -55,7 +56,7 @@ static inline void batadv_set_bit(unsigned long *seq_bits, s32 n)
set_bit(n, seq_bits); /* turn the position on */
}
-int batadv_bit_get_packet(void *priv, unsigned long *seq_bits, s32 seq_num_diff,
- int set_mark);
+bool batadv_bit_get_packet(void *priv, unsigned long *seq_bits,
+ s32 seq_num_diff, int set_mark);
#endif /* _NET_BATMAN_ADV_BITARRAY_H_ */
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 2c9aa671a49b..748a9ead7ce5 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -50,6 +50,7 @@
#include "hash.h"
#include "originator.h"
#include "packet.h"
+#include "sysfs.h"
#include "translation-table.h"
static const u8 batadv_announce_mac[4] = {0x43, 0x05, 0x43, 0x05};
@@ -100,10 +101,10 @@ static inline u32 batadv_choose_backbone_gw(const void *data, u32 size)
* @node: list node of the first entry to compare
* @data2: pointer to the second backbone gateway
*
- * Return: 1 if the backbones have the same data, 0 otherwise
+ * Return: true if the backbones have the same data, false otherwise
*/
-static int batadv_compare_backbone_gw(const struct hlist_node *node,
- const void *data2)
+static bool batadv_compare_backbone_gw(const struct hlist_node *node,
+ const void *data2)
{
const void *data1 = container_of(node, struct batadv_bla_backbone_gw,
hash_entry);
@@ -111,12 +112,12 @@ static int batadv_compare_backbone_gw(const struct hlist_node *node,
const struct batadv_bla_backbone_gw *gw2 = data2;
if (!batadv_compare_eth(gw1->orig, gw2->orig))
- return 0;
+ return false;
if (gw1->vid != gw2->vid)
- return 0;
+ return false;
- return 1;
+ return true;
}
/**
@@ -124,10 +125,10 @@ static int batadv_compare_backbone_gw(const struct hlist_node *node,
* @node: list node of the first entry to compare
* @data2: pointer to the second claims
*
- * Return: 1 if the claim have the same data, 0 otherwise
+ * Return: true if the claim have the same data, 0 otherwise
*/
-static int batadv_compare_claim(const struct hlist_node *node,
- const void *data2)
+static bool batadv_compare_claim(const struct hlist_node *node,
+ const void *data2)
{
const void *data1 = container_of(node, struct batadv_bla_claim,
hash_entry);
@@ -135,12 +136,12 @@ static int batadv_compare_claim(const struct hlist_node *node,
const struct batadv_bla_claim *cl2 = data2;
if (!batadv_compare_eth(cl1->addr, cl2->addr))
- return 0;
+ return false;
if (cl1->vid != cl2->vid)
- return 0;
+ return false;
- return 1;
+ return true;
}
/**
@@ -407,6 +408,14 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac,
ethhdr->h_source, ethhdr->h_dest,
BATADV_PRINT_VID(vid));
break;
+ case BATADV_CLAIM_TYPE_LOOPDETECT:
+ ether_addr_copy(ethhdr->h_source, mac);
+ batadv_dbg(BATADV_DBG_BLA, bat_priv,
+ "bla_send_claim(): LOOPDETECT of %pM to %pM on vid %d\n",
+ ethhdr->h_source, ethhdr->h_dest,
+ BATADV_PRINT_VID(vid));
+
+ break;
}
if (vid & BATADV_VLAN_HAS_TAG)
@@ -427,6 +436,36 @@ out:
}
/**
+ * batadv_bla_loopdetect_report - worker for reporting the loop
+ * @work: work queue item
+ *
+ * Throws an uevent, as the loopdetect check function can't do that itself
+ * since the kernel may sleep while throwing uevents.
+ */
+static void batadv_bla_loopdetect_report(struct work_struct *work)
+{
+ struct batadv_bla_backbone_gw *backbone_gw;
+ struct batadv_priv *bat_priv;
+ char vid_str[6] = { '\0' };
+
+ backbone_gw = container_of(work, struct batadv_bla_backbone_gw,
+ report_work);
+ bat_priv = backbone_gw->bat_priv;
+
+ batadv_info(bat_priv->soft_iface,
+ "Possible loop on VLAN %d detected which can't be handled by BLA - please check your network setup!\n",
+ BATADV_PRINT_VID(backbone_gw->vid));
+ snprintf(vid_str, sizeof(vid_str), "%d",
+ BATADV_PRINT_VID(backbone_gw->vid));
+ vid_str[sizeof(vid_str) - 1] = 0;
+
+ batadv_throw_uevent(bat_priv, BATADV_UEV_BLA, BATADV_UEV_LOOPDETECT,
+ vid_str);
+
+ batadv_backbone_gw_put(backbone_gw);
+}
+
+/**
* batadv_bla_get_backbone_gw - finds or creates a backbone gateway
* @bat_priv: the bat priv with all the soft interface information
* @orig: the mac address of the originator
@@ -464,6 +503,7 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, u8 *orig,
atomic_set(&entry->request_sent, 0);
atomic_set(&entry->wait_periods, 0);
ether_addr_copy(entry->orig, orig);
+ INIT_WORK(&entry->report_work, batadv_bla_loopdetect_report);
/* one for the hash, one for returning */
kref_init(&entry->refcount);
@@ -735,22 +775,22 @@ static void batadv_bla_del_claim(struct batadv_priv *bat_priv,
* @backbone_addr: originator address of the sender (Ethernet source MAC)
* @vid: the VLAN ID of the frame
*
- * Return: 1 if handled
+ * Return: true if handled
*/
-static int batadv_handle_announce(struct batadv_priv *bat_priv, u8 *an_addr,
- u8 *backbone_addr, unsigned short vid)
+static bool batadv_handle_announce(struct batadv_priv *bat_priv, u8 *an_addr,
+ u8 *backbone_addr, unsigned short vid)
{
struct batadv_bla_backbone_gw *backbone_gw;
u16 backbone_crc, crc;
if (memcmp(an_addr, batadv_announce_mac, 4) != 0)
- return 0;
+ return false;
backbone_gw = batadv_bla_get_backbone_gw(bat_priv, backbone_addr, vid,
false);
if (unlikely(!backbone_gw))
- return 1;
+ return true;
/* handle as ANNOUNCE frame */
backbone_gw->lasttime = jiffies;
@@ -783,7 +823,7 @@ static int batadv_handle_announce(struct batadv_priv *bat_priv, u8 *an_addr,
}
batadv_backbone_gw_put(backbone_gw);
- return 1;
+ return true;
}
/**
@@ -794,29 +834,29 @@ static int batadv_handle_announce(struct batadv_priv *bat_priv, u8 *an_addr,
* @ethhdr: ethernet header of a packet
* @vid: the VLAN ID of the frame
*
- * Return: 1 if handled
+ * Return: true if handled
*/
-static int batadv_handle_request(struct batadv_priv *bat_priv,
- struct batadv_hard_iface *primary_if,
- u8 *backbone_addr, struct ethhdr *ethhdr,
- unsigned short vid)
+static bool batadv_handle_request(struct batadv_priv *bat_priv,
+ struct batadv_hard_iface *primary_if,
+ u8 *backbone_addr, struct ethhdr *ethhdr,
+ unsigned short vid)
{
/* check for REQUEST frame */
if (!batadv_compare_eth(backbone_addr, ethhdr->h_dest))
- return 0;
+ return false;
/* sanity check, this should not happen on a normal switch,
* we ignore it in this case.
*/
if (!batadv_compare_eth(ethhdr->h_dest, primary_if->net_dev->dev_addr))
- return 1;
+ return true;
batadv_dbg(BATADV_DBG_BLA, bat_priv,
"handle_request(): REQUEST vid %d (sent by %pM)...\n",
BATADV_PRINT_VID(vid), ethhdr->h_source);
batadv_bla_answer_request(bat_priv, primary_if, vid);
- return 1;
+ return true;
}
/**
@@ -827,12 +867,12 @@ static int batadv_handle_request(struct batadv_priv *bat_priv,
* @claim_addr: Client to be unclaimed (ARP sender HW MAC)
* @vid: the VLAN ID of the frame
*
- * Return: 1 if handled
+ * Return: true if handled
*/
-static int batadv_handle_unclaim(struct batadv_priv *bat_priv,
- struct batadv_hard_iface *primary_if,
- u8 *backbone_addr, u8 *claim_addr,
- unsigned short vid)
+static bool batadv_handle_unclaim(struct batadv_priv *bat_priv,
+ struct batadv_hard_iface *primary_if,
+ u8 *backbone_addr, u8 *claim_addr,
+ unsigned short vid)
{
struct batadv_bla_backbone_gw *backbone_gw;
@@ -845,7 +885,7 @@ static int batadv_handle_unclaim(struct batadv_priv *bat_priv,
backbone_gw = batadv_backbone_hash_find(bat_priv, backbone_addr, vid);
if (!backbone_gw)
- return 1;
+ return true;
/* this must be an UNCLAIM frame */
batadv_dbg(BATADV_DBG_BLA, bat_priv,
@@ -854,7 +894,7 @@ static int batadv_handle_unclaim(struct batadv_priv *bat_priv,
batadv_bla_del_claim(bat_priv, claim_addr, vid);
batadv_backbone_gw_put(backbone_gw);
- return 1;
+ return true;
}
/**
@@ -865,12 +905,12 @@ static int batadv_handle_unclaim(struct batadv_priv *bat_priv,
* @claim_addr: client mac address to be claimed (ARP sender HW MAC)
* @vid: the VLAN ID of the frame
*
- * Return: 1 if handled
+ * Return: true if handled
*/
-static int batadv_handle_claim(struct batadv_priv *bat_priv,
- struct batadv_hard_iface *primary_if,
- u8 *backbone_addr, u8 *claim_addr,
- unsigned short vid)
+static bool batadv_handle_claim(struct batadv_priv *bat_priv,
+ struct batadv_hard_iface *primary_if,
+ u8 *backbone_addr, u8 *claim_addr,
+ unsigned short vid)
{
struct batadv_bla_backbone_gw *backbone_gw;
@@ -880,7 +920,7 @@ static int batadv_handle_claim(struct batadv_priv *bat_priv,
false);
if (unlikely(!backbone_gw))
- return 1;
+ return true;
/* this must be a CLAIM frame */
batadv_bla_add_claim(bat_priv, claim_addr, vid, backbone_gw);
@@ -891,7 +931,7 @@ static int batadv_handle_claim(struct batadv_priv *bat_priv,
/* TODO: we could call something like tt_local_del() here. */
batadv_backbone_gw_put(backbone_gw);
- return 1;
+ return true;
}
/**
@@ -975,12 +1015,12 @@ static int batadv_check_claim_group(struct batadv_priv *bat_priv,
* @primary_if: the primary hard interface of this batman soft interface
* @skb: the frame to be checked
*
- * Return: 1 if it was a claim frame, otherwise return 0 to
+ * Return: true if it was a claim frame, otherwise return false to
* tell the callee that it can use the frame on its own.
*/
-static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
- struct batadv_hard_iface *primary_if,
- struct sk_buff *skb)
+static bool batadv_bla_process_claim(struct batadv_priv *bat_priv,
+ struct batadv_hard_iface *primary_if,
+ struct sk_buff *skb)
{
struct batadv_bla_claim_dst *bla_dst, *bla_dst_own;
u8 *hw_src, *hw_dst;
@@ -1011,7 +1051,7 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
vhdr = skb_header_pointer(skb, headlen, VLAN_HLEN,
&vhdr_buf);
if (!vhdr)
- return 0;
+ return false;
proto = vhdr->h_vlan_encapsulated_proto;
headlen += VLAN_HLEN;
@@ -1020,12 +1060,12 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
}
if (proto != htons(ETH_P_ARP))
- return 0; /* not a claim frame */
+ return false; /* not a claim frame */
/* this must be a ARP frame. check if it is a claim. */
if (unlikely(!pskb_may_pull(skb, headlen + arp_hdr_len(skb->dev))))
- return 0;
+ return false;
/* pskb_may_pull() may have modified the pointers, get ethhdr again */
ethhdr = eth_hdr(skb);
@@ -1035,13 +1075,13 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
* IP information
*/
if (arphdr->ar_hrd != htons(ARPHRD_ETHER))
- return 0;
+ return false;
if (arphdr->ar_pro != htons(ETH_P_IP))
- return 0;
+ return false;
if (arphdr->ar_hln != ETH_ALEN)
- return 0;
+ return false;
if (arphdr->ar_pln != 4)
- return 0;
+ return false;
hw_src = (u8 *)arphdr + sizeof(struct arphdr);
hw_dst = hw_src + ETH_ALEN + 4;
@@ -1051,14 +1091,18 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
/* check if it is a claim frame in general */
if (memcmp(bla_dst->magic, bla_dst_own->magic,
sizeof(bla_dst->magic)) != 0)
- return 0;
+ return false;
/* check if there is a claim frame encapsulated deeper in (QinQ) and
* drop that, as this is not supported by BLA but should also not be
* sent via the mesh.
*/
if (vlan_depth > 1)
- return 1;
+ return true;
+
+ /* Let the loopdetect frames on the mesh in any case. */
+ if (bla_dst->type == BATADV_CLAIM_TYPE_LOOPDETECT)
+ return 0;
/* check if it is a claim frame. */
ret = batadv_check_claim_group(bat_priv, primary_if, hw_src, hw_dst,
@@ -1070,7 +1114,7 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
hw_dst);
if (ret < 2)
- return ret;
+ return !!ret;
/* become a backbone gw ourselves on this vlan if not happened yet */
batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
@@ -1080,30 +1124,30 @@ static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
case BATADV_CLAIM_TYPE_CLAIM:
if (batadv_handle_claim(bat_priv, primary_if, hw_src,
ethhdr->h_source, vid))
- return 1;
+ return true;
break;
case BATADV_CLAIM_TYPE_UNCLAIM:
if (batadv_handle_unclaim(bat_priv, primary_if,
ethhdr->h_source, hw_src, vid))
- return 1;
+ return true;
break;
case BATADV_CLAIM_TYPE_ANNOUNCE:
if (batadv_handle_announce(bat_priv, hw_src, ethhdr->h_source,
vid))
- return 1;
+ return true;
break;
case BATADV_CLAIM_TYPE_REQUEST:
if (batadv_handle_request(bat_priv, primary_if, hw_src, ethhdr,
vid))
- return 1;
+ return true;
break;
}
batadv_dbg(BATADV_DBG_BLA, bat_priv,
"bla_process_claim(): ERROR - this looks like a claim frame, but is useless. eth src %pM on vid %d ...(hw_src %pM, hw_dst %pM)\n",
ethhdr->h_source, BATADV_PRINT_VID(vid), hw_src, hw_dst);
- return 1;
+ return true;
}
/**
@@ -1265,6 +1309,26 @@ void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
}
/**
+ * batadv_bla_send_loopdetect - send a loopdetect frame
+ * @bat_priv: the bat priv with all the soft interface information
+ * @backbone_gw: the backbone gateway for which a loop should be detected
+ *
+ * To detect loops that the bridge loop avoidance can't handle, send a loop
+ * detection packet on the backbone. Unlike other BLA frames, this frame will
+ * be allowed on the mesh by other nodes. If it is received on the mesh, this
+ * indicates that there is a loop.
+ */
+static void
+batadv_bla_send_loopdetect(struct batadv_priv *bat_priv,
+ struct batadv_bla_backbone_gw *backbone_gw)
+{
+ batadv_dbg(BATADV_DBG_BLA, bat_priv, "Send loopdetect frame for vid %d\n",
+ backbone_gw->vid);
+ batadv_bla_send_claim(bat_priv, bat_priv->bla.loopdetect_addr,
+ backbone_gw->vid, BATADV_CLAIM_TYPE_LOOPDETECT);
+}
+
+/**
* batadv_bla_status_update - purge bla interfaces if necessary
* @net_dev: the soft interface net device
*/
@@ -1301,6 +1365,7 @@ static void batadv_bla_periodic_work(struct work_struct *work)
struct batadv_bla_backbone_gw *backbone_gw;
struct batadv_hashtable *hash;
struct batadv_hard_iface *primary_if;
+ bool send_loopdetect = false;
int i;
delayed_work = to_delayed_work(work);
@@ -1316,6 +1381,22 @@ static void batadv_bla_periodic_work(struct work_struct *work)
if (!atomic_read(&bat_priv->bridge_loop_avoidance))
goto out;
+ if (atomic_dec_and_test(&bat_priv->bla.loopdetect_next)) {
+ /* set a new random mac address for the next bridge loop
+ * detection frames. Set the locally administered bit to avoid
+ * collisions with users mac addresses.
+ */
+ random_ether_addr(bat_priv->bla.loopdetect_addr);
+ bat_priv->bla.loopdetect_addr[0] = 0xba;
+ bat_priv->bla.loopdetect_addr[1] = 0xbe;
+ bat_priv->bla.loopdetect_lasttime = jiffies;
+ atomic_set(&bat_priv->bla.loopdetect_next,
+ BATADV_BLA_LOOPDETECT_PERIODS);
+
+ /* mark for sending loop detect on all VLANs */
+ send_loopdetect = true;
+ }
+
hash = bat_priv->bla.backbone_hash;
if (!hash)
goto out;
@@ -1332,6 +1413,9 @@ static void batadv_bla_periodic_work(struct work_struct *work)
backbone_gw->lasttime = jiffies;
batadv_bla_send_announce(bat_priv, backbone_gw);
+ if (send_loopdetect)
+ batadv_bla_send_loopdetect(bat_priv,
+ backbone_gw);
/* request_sent is only set after creation to avoid
* problems when we are not yet known as backbone gw
@@ -1405,6 +1489,9 @@ int batadv_bla_init(struct batadv_priv *bat_priv)
bat_priv->bla.bcast_duplist[i].entrytime = entrytime;
bat_priv->bla.bcast_duplist_curr = 0;
+ atomic_set(&bat_priv->bla.loopdetect_next,
+ BATADV_BLA_LOOPDETECT_PERIODS);
+
if (bat_priv->bla.claim_hash)
return 0;
@@ -1442,15 +1529,16 @@ int batadv_bla_init(struct batadv_priv *bat_priv)
* sent by another host, drop it. We allow equal packets from
* the same host however as this might be intended.
*
- * Return: 1 if a packet is in the duplicate list, 0 otherwise.
+ * Return: true if a packet is in the duplicate list, false otherwise.
*/
-int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
- struct sk_buff *skb)
+bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
+ struct sk_buff *skb)
{
- int i, curr, ret = 0;
+ int i, curr;
__be32 crc;
struct batadv_bcast_packet *bcast_packet;
struct batadv_bcast_duplist_entry *entry;
+ bool ret = false;
bcast_packet = (struct batadv_bcast_packet *)skb->data;
@@ -1478,9 +1566,9 @@ int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
continue;
/* this entry seems to match: same crc, not too old,
- * and from another gw. therefore return 1 to forbid it.
+ * and from another gw. therefore return true to forbid it.
*/
- ret = 1;
+ ret = true;
goto out;
}
/* not found, add a new entry (overwrite the oldest entry)
@@ -1546,21 +1634,21 @@ bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
* @orig_node: the orig_node of the frame
* @hdr_size: maximum length of the frame
*
- * Return: 1 if the orig_node is also a gateway on the soft interface, otherwise
- * it returns 0.
+ * Return: true if the orig_node is also a gateway on the soft interface,
+ * otherwise it returns false.
*/
-int batadv_bla_is_backbone_gw(struct sk_buff *skb,
- struct batadv_orig_node *orig_node, int hdr_size)
+bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
+ struct batadv_orig_node *orig_node, int hdr_size)
{
struct batadv_bla_backbone_gw *backbone_gw;
unsigned short vid;
if (!atomic_read(&orig_node->bat_priv->bridge_loop_avoidance))
- return 0;
+ return false;
/* first, find out the vid. */
if (!pskb_may_pull(skb, hdr_size + ETH_HLEN))
- return 0;
+ return false;
vid = batadv_get_vid(skb, hdr_size);
@@ -1568,10 +1656,10 @@ int batadv_bla_is_backbone_gw(struct sk_buff *skb,
backbone_gw = batadv_backbone_hash_find(orig_node->bat_priv,
orig_node->orig, vid);
if (!backbone_gw)
- return 0;
+ return false;
batadv_backbone_gw_put(backbone_gw);
- return 1;
+ return true;
}
/**
@@ -1602,6 +1690,55 @@ void batadv_bla_free(struct batadv_priv *bat_priv)
}
/**
+ * batadv_bla_loopdetect_check - check and handle a detected loop
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: the packet to check
+ * @primary_if: interface where the request came on
+ * @vid: the VLAN ID of the frame
+ *
+ * Checks if this packet is a loop detect frame which has been sent by us,
+ * throw an uevent and log the event if that is the case.
+ *
+ * Return: true if it is a loop detect frame which is to be dropped, false
+ * otherwise.
+ */
+static bool
+batadv_bla_loopdetect_check(struct batadv_priv *bat_priv, struct sk_buff *skb,
+ struct batadv_hard_iface *primary_if,
+ unsigned short vid)
+{
+ struct batadv_bla_backbone_gw *backbone_gw;
+ struct ethhdr *ethhdr;
+
+ ethhdr = eth_hdr(skb);
+
+ /* Only check for the MAC address and skip more checks here for
+ * performance reasons - this function is on the hotpath, after all.
+ */
+ if (!batadv_compare_eth(ethhdr->h_source,
+ bat_priv->bla.loopdetect_addr))
+ return false;
+
+ /* If the packet came too late, don't forward it on the mesh
+ * but don't consider that as loop. It might be a coincidence.
+ */
+ if (batadv_has_timed_out(bat_priv->bla.loopdetect_lasttime,
+ BATADV_BLA_LOOPDETECT_TIMEOUT))
+ return true;
+
+ backbone_gw = batadv_bla_get_backbone_gw(bat_priv,
+ primary_if->net_dev->dev_addr,
+ vid, true);
+ if (unlikely(!backbone_gw))
+ return true;
+
+ queue_work(batadv_event_workqueue, &backbone_gw->report_work);
+ /* backbone_gw is unreferenced in the report work function function */
+
+ return true;
+}
+
+/**
* batadv_bla_rx - check packets coming from the mesh.
* @bat_priv: the bat priv with all the soft interface information
* @skb: the frame to be checked
@@ -1614,16 +1751,16 @@ void batadv_bla_free(struct batadv_priv *bat_priv)
*
* in these cases, the skb is further handled by this function
*
- * Return: 1 if handled, otherwise it returns 0 and the caller shall further
- * process the skb.
+ * Return: true if handled, otherwise it returns false and the caller shall
+ * further process the skb.
*/
-int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid, bool is_bcast)
+bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
+ unsigned short vid, bool is_bcast)
{
struct ethhdr *ethhdr;
struct batadv_bla_claim search_claim, *claim = NULL;
struct batadv_hard_iface *primary_if;
- int ret;
+ bool ret;
ethhdr = eth_hdr(skb);
@@ -1634,6 +1771,9 @@ int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
if (!atomic_read(&bat_priv->bridge_loop_avoidance))
goto allow;
+ if (batadv_bla_loopdetect_check(bat_priv, skb, primary_if, vid))
+ goto handled;
+
if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
/* don't allow broadcasts while requests are in flight */
if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast)
@@ -1682,12 +1822,12 @@ int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
}
allow:
batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
- ret = 0;
+ ret = false;
goto out;
handled:
kfree_skb(skb);
- ret = 1;
+ ret = true;
out:
if (primary_if)
@@ -1711,16 +1851,16 @@ out:
*
* This call might reallocate skb data.
*
- * Return: 1 if handled, otherwise it returns 0 and the caller shall further
- * process the skb.
+ * Return: true if handled, otherwise it returns false and the caller shall
+ * further process the skb.
*/
-int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid)
+bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
+ unsigned short vid)
{
struct ethhdr *ethhdr;
struct batadv_bla_claim search_claim, *claim = NULL;
struct batadv_hard_iface *primary_if;
- int ret = 0;
+ bool ret = false;
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
@@ -1774,10 +1914,10 @@ int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
}
allow:
batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
- ret = 0;
+ ret = false;
goto out;
handled:
- ret = 1;
+ ret = true;
out:
if (primary_if)
batadv_hardif_put(primary_if);
diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h
index 579f0fa6fe6a..0f01daeb359e 100644
--- a/net/batman-adv/bridge_loop_avoidance.h
+++ b/net/batman-adv/bridge_loop_avoidance.h
@@ -27,19 +27,20 @@ struct seq_file;
struct sk_buff;
#ifdef CONFIG_BATMAN_ADV_BLA
-int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid, bool is_bcast);
-int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid);
-int batadv_bla_is_backbone_gw(struct sk_buff *skb,
- struct batadv_orig_node *orig_node, int hdr_size);
+bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
+ unsigned short vid, bool is_bcast);
+bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
+ unsigned short vid);
+bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
+ struct batadv_orig_node *orig_node,
+ int hdr_size);
int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
void *offset);
bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
unsigned short vid);
-int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
- struct sk_buff *skb);
+bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
+ struct sk_buff *skb);
void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
struct batadv_hard_iface *primary_if,
struct batadv_hard_iface *oldif);
@@ -50,24 +51,24 @@ void batadv_bla_free(struct batadv_priv *bat_priv);
#define BATADV_BLA_CRC_INIT 0
#else /* ifdef CONFIG_BATMAN_ADV_BLA */
-static inline int batadv_bla_rx(struct batadv_priv *bat_priv,
- struct sk_buff *skb, unsigned short vid,
- bool is_bcast)
+static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
+ struct sk_buff *skb, unsigned short vid,
+ bool is_bcast)
{
- return 0;
+ return false;
}
-static inline int batadv_bla_tx(struct batadv_priv *bat_priv,
- struct sk_buff *skb, unsigned short vid)
+static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
+ struct sk_buff *skb, unsigned short vid)
{
- return 0;
+ return false;
}
-static inline int batadv_bla_is_backbone_gw(struct sk_buff *skb,
- struct batadv_orig_node *orig_node,
- int hdr_size)
+static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
+ struct batadv_orig_node *orig_node,
+ int hdr_size)
{
- return 0;
+ return false;
}
static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
@@ -88,11 +89,11 @@ static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
return false;
}
-static inline int
+static inline bool
batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
struct sk_buff *skb)
{
- return 0;
+ return false;
}
static inline void
diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c
index aa315da83429..952900466d88 100644
--- a/net/batman-adv/debugfs.c
+++ b/net/batman-adv/debugfs.c
@@ -134,7 +134,7 @@ static int batadv_log_release(struct inode *inode, struct file *file)
return 0;
}
-static int batadv_log_empty(struct batadv_priv_debug_log *debug_log)
+static bool batadv_log_empty(struct batadv_priv_debug_log *debug_log)
{
return !(debug_log->log_start - debug_log->log_end);
}
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index 67f44f5d630b..278800a99c69 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -165,14 +165,14 @@ static void batadv_dat_purge(struct work_struct *work)
* @node: node in the local table
* @data2: second object to compare the node to
*
- * Return: 1 if the two entries are the same, 0 otherwise.
+ * Return: true if the two entries are the same, false otherwise.
*/
-static int batadv_compare_dat(const struct hlist_node *node, const void *data2)
+static bool batadv_compare_dat(const struct hlist_node *node, const void *data2)
{
const void *data1 = container_of(node, struct batadv_dat_entry,
hash_entry);
- return memcmp(data1, data2, sizeof(__be32)) == 0 ? 1 : 0;
+ return memcmp(data1, data2, sizeof(__be32)) == 0;
}
/**
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index c59aff5ccac8..5839c569f769 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -135,8 +135,8 @@ static void batadv_gw_select(struct batadv_priv *bat_priv,
spin_lock_bh(&bat_priv->gw.list_lock);
- if (new_gw_node && !kref_get_unless_zero(&new_gw_node->refcount))
- new_gw_node = NULL;
+ if (new_gw_node)
+ kref_get(&new_gw_node->refcount);
curr_gw_node = rcu_dereference_protected(bat_priv->gw.curr_gw, 1);
rcu_assign_pointer(bat_priv->gw.curr_gw, new_gw_node);
@@ -440,15 +440,11 @@ static void batadv_gw_node_add(struct batadv_priv *bat_priv,
if (gateway->bandwidth_down == 0)
return;
- if (!kref_get_unless_zero(&orig_node->refcount))
- return;
-
gw_node = kzalloc(sizeof(*gw_node), GFP_ATOMIC);
- if (!gw_node) {
- batadv_orig_node_put(orig_node);
+ if (!gw_node)
return;
- }
+ kref_get(&orig_node->refcount);
INIT_HLIST_NODE(&gw_node->list);
gw_node->orig_node = orig_node;
gw_node->bandwidth_down = ntohl(gateway->bandwidth_down);
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 0a7deaf2670a..8c2f39962fa5 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -36,7 +36,6 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
-#include <net/net_namespace.h>
#include "bridge_loop_avoidance.h"
#include "debugfs.h"
@@ -121,6 +120,7 @@ static bool batadv_mutual_parents(const struct net_device *dev1,
static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
{
struct net_device *parent_dev;
+ struct net *net = dev_net(net_dev);
bool ret;
/* check if this is a batman-adv mesh interface */
@@ -133,7 +133,7 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
return false;
/* recurse over the parent device */
- parent_dev = __dev_get_by_index(&init_net, dev_get_iflink(net_dev));
+ parent_dev = __dev_get_by_index(net, dev_get_iflink(net_dev));
/* if we got a NULL parent_dev there is something broken.. */
if (WARN(!parent_dev, "Cannot find parent device"))
return false;
@@ -146,22 +146,22 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
return ret;
}
-static int batadv_is_valid_iface(const struct net_device *net_dev)
+static bool batadv_is_valid_iface(const struct net_device *net_dev)
{
if (net_dev->flags & IFF_LOOPBACK)
- return 0;
+ return false;
if (net_dev->type != ARPHRD_ETHER)
- return 0;
+ return false;
if (net_dev->addr_len != ETH_ALEN)
- return 0;
+ return false;
/* no batman over batman */
if (batadv_is_on_batman_iface(net_dev))
- return 0;
+ return false;
- return 1;
+ return true;
}
/**
@@ -236,8 +236,8 @@ static void batadv_primary_if_select(struct batadv_priv *bat_priv,
ASSERT_RTNL();
- if (new_hard_iface && !kref_get_unless_zero(&new_hard_iface->refcount))
- new_hard_iface = NULL;
+ if (new_hard_iface)
+ kref_get(&new_hard_iface->refcount);
curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1);
rcu_assign_pointer(bat_priv->primary_if, new_hard_iface);
@@ -456,7 +456,7 @@ static int batadv_master_del_slave(struct batadv_hard_iface *slave,
}
int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
- const char *iface_name)
+ struct net *net, const char *iface_name)
{
struct batadv_priv *bat_priv;
struct net_device *soft_iface, *master;
@@ -467,13 +467,12 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
goto out;
- if (!kref_get_unless_zero(&hard_iface->refcount))
- goto out;
+ kref_get(&hard_iface->refcount);
- soft_iface = dev_get_by_name(&init_net, iface_name);
+ soft_iface = dev_get_by_name(net, iface_name);
if (!soft_iface) {
- soft_iface = batadv_softif_create(iface_name);
+ soft_iface = batadv_softif_create(net, iface_name);
if (!soft_iface) {
ret = -ENOMEM;
@@ -522,6 +521,7 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
goto err_upper;
}
+ kref_get(&hard_iface->refcount);
hard_iface->batman_adv_ptype.type = ethertype;
hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv;
hard_iface->batman_adv_ptype.dev = hard_iface->net_dev;
@@ -583,6 +583,7 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
batadv_info(hard_iface->soft_iface, "Removing interface: %s\n",
hard_iface->net_dev->name);
dev_remove_pack(&hard_iface->batman_adv_ptype);
+ batadv_hardif_put(hard_iface);
bat_priv->num_ifaces--;
batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces);
@@ -652,8 +653,7 @@ batadv_hardif_add_interface(struct net_device *net_dev)
ASSERT_RTNL();
- ret = batadv_is_valid_iface(net_dev);
- if (ret != 1)
+ if (!batadv_is_valid_iface(net_dev))
goto out;
dev_hold(net_dev);
diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h
index d74f1983f33e..a76724d369bf 100644
--- a/net/batman-adv/hard-interface.h
+++ b/net/batman-adv/hard-interface.h
@@ -28,6 +28,7 @@
#include <linux/types.h>
struct net_device;
+struct net;
enum batadv_hard_if_state {
BATADV_IF_NOT_IN_USE,
@@ -55,7 +56,7 @@ bool batadv_is_wifi_iface(int ifindex);
struct batadv_hard_iface*
batadv_hardif_get_by_netdev(const struct net_device *net_dev);
int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
- const char *iface_name);
+ struct net *net, const char *iface_name);
void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
enum batadv_hard_if_cleanup autodel);
void batadv_hardif_remove_interfaces(void);
diff --git a/net/batman-adv/hash.h b/net/batman-adv/hash.h
index 9bb57b87447c..cbbf87075f06 100644
--- a/net/batman-adv/hash.h
+++ b/net/batman-adv/hash.h
@@ -32,10 +32,10 @@ struct lock_class_key;
/* callback to a compare function. should compare 2 element datas for their
* keys
*
- * Return: 0 if same and not 0 if not same
+ * Return: true if same and false if not same
*/
-typedef int (*batadv_hashdata_compare_cb)(const struct hlist_node *,
- const void *);
+typedef bool (*batadv_hashdata_compare_cb)(const struct hlist_node *,
+ const void *);
/* the hashfunction
*
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 78c05a91ae6f..5f2974bd1227 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -401,11 +401,19 @@ int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
hard_iface = container_of(ptype, struct batadv_hard_iface,
batman_adv_ptype);
+
+ /* Prevent processing a packet received on an interface which is getting
+ * shut down otherwise the packet may trigger de-reference errors
+ * further down in the receive path.
+ */
+ if (!kref_get_unless_zero(&hard_iface->refcount))
+ goto err_out;
+
skb = skb_share_check(skb, GFP_ATOMIC);
/* skb was released by skb_share_check() */
if (!skb)
- goto err_out;
+ goto err_put;
/* packet should hold at least type and version */
if (unlikely(!pskb_may_pull(skb, 2)))
@@ -448,6 +456,8 @@ int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
if (ret == NET_RX_DROP)
kfree_skb(skb);
+ batadv_hardif_put(hard_iface);
+
/* return NET_RX_SUCCESS in any case as we
* most probably dropped the packet for
* routing-logical reasons.
@@ -456,6 +466,8 @@ int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
err_free:
kfree_skb(skb);
+err_put:
+ batadv_hardif_put(hard_iface);
err_out:
return NET_RX_DROP;
}
@@ -736,9 +748,7 @@ batadv_tvlv_container_get(struct batadv_priv *bat_priv, u8 type, u8 version)
if (tvlv_tmp->tvlv_hdr.version != version)
continue;
- if (!kref_get_unless_zero(&tvlv_tmp->refcount))
- continue;
-
+ kref_get(&tvlv_tmp->refcount);
tvlv = tvlv_tmp;
break;
}
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 07a6042d0ad6..76925266deed 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -120,6 +120,8 @@
#define BATADV_BLA_BACKBONE_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 6)
#define BATADV_BLA_CLAIM_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 10)
#define BATADV_BLA_WAIT_PERIODS 3
+#define BATADV_BLA_LOOPDETECT_PERIODS 6
+#define BATADV_BLA_LOOPDETECT_TIMEOUT 3000 /* 3 seconds */
#define BATADV_DUPLIST_SIZE 16
#define BATADV_DUPLIST_TIMEOUT 500 /* 500 ms */
@@ -142,10 +144,12 @@ enum batadv_uev_action {
BATADV_UEV_ADD = 0,
BATADV_UEV_DEL,
BATADV_UEV_CHANGE,
+ BATADV_UEV_LOOPDETECT,
};
enum batadv_uev_type {
BATADV_UEV_GW = 0,
+ BATADV_UEV_BLA,
};
#define BATADV_GW_THRESHOLD 50
@@ -288,7 +292,7 @@ static inline void _batadv_dbg(int type __always_unused,
*
* note: can't use ether_addr_equal() as it requires aligned memory
*
- * Return: 1 if they are the same ethernet addr
+ * Return: true if they are the same ethernet addr
*/
static inline bool batadv_compare_eth(const void *data1, const void *data2)
{
diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c
index 1da8e0e1b18f..678f06865312 100644
--- a/net/batman-adv/network-coding.c
+++ b/net/batman-adv/network-coding.c
@@ -510,10 +510,10 @@ static u32 batadv_nc_hash_choose(const void *data, u32 size)
* @node: node in the local table
* @data2: second object to compare the node to
*
- * Return: 1 if the two entry are the same, 0 otherwise
+ * Return: true if the two entry are the same, false otherwise
*/
-static int batadv_nc_hash_compare(const struct hlist_node *node,
- const void *data2)
+static bool batadv_nc_hash_compare(const struct hlist_node *node,
+ const void *data2)
{
const struct batadv_nc_path *nc_path1, *nc_path2;
@@ -521,15 +521,13 @@ static int batadv_nc_hash_compare(const struct hlist_node *node,
nc_path2 = data2;
/* Return 1 if the two keys are identical */
- if (memcmp(nc_path1->prev_hop, nc_path2->prev_hop,
- sizeof(nc_path1->prev_hop)) != 0)
- return 0;
+ if (!batadv_compare_eth(nc_path1->prev_hop, nc_path2->prev_hop))
+ return false;
- if (memcmp(nc_path1->next_hop, nc_path2->next_hop,
- sizeof(nc_path1->next_hop)) != 0)
- return 0;
+ if (!batadv_compare_eth(nc_path1->next_hop, nc_path2->next_hop))
+ return false;
- return 1;
+ return true;
}
/**
@@ -856,8 +854,7 @@ batadv_nc_get_nc_node(struct batadv_priv *bat_priv,
if (!nc_node)
return NULL;
- if (!kref_get_unless_zero(&orig_neigh_node->refcount))
- goto free;
+ kref_get(&orig_neigh_node->refcount);
/* Initialize nc_node */
INIT_LIST_HEAD(&nc_node->list);
@@ -884,10 +881,6 @@ batadv_nc_get_nc_node(struct batadv_priv *bat_priv,
spin_unlock_bh(lock);
return nc_node;
-
-free:
- kfree(nc_node);
- return NULL;
}
/**
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index f885a41d06d5..1ff4ee473966 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -54,9 +54,9 @@ static void batadv_purge_orig(struct work_struct *work);
* @node: node in the local table
* @data2: second object to compare the node to
*
- * Return: 1 if they are the same originator
+ * Return: true if they are the same originator
*/
-int batadv_compare_orig(const struct hlist_node *node, const void *data2)
+bool batadv_compare_orig(const struct hlist_node *node, const void *data2)
{
const void *data1 = container_of(node, struct batadv_orig_node,
hash_entry);
@@ -374,12 +374,8 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
if (!orig_ifinfo)
goto out;
- if (if_outgoing != BATADV_IF_DEFAULT &&
- !kref_get_unless_zero(&if_outgoing->refcount)) {
- kfree(orig_ifinfo);
- orig_ifinfo = NULL;
- goto out;
- }
+ if (if_outgoing != BATADV_IF_DEFAULT)
+ kref_get(&if_outgoing->refcount);
reset_time = jiffies - 1;
reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
@@ -455,11 +451,8 @@ batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
if (!neigh_ifinfo)
goto out;
- if (if_outgoing && !kref_get_unless_zero(&if_outgoing->refcount)) {
- kfree(neigh_ifinfo);
- neigh_ifinfo = NULL;
- goto out;
- }
+ if (if_outgoing)
+ kref_get(&if_outgoing->refcount);
INIT_HLIST_NODE(&neigh_ifinfo->list);
kref_init(&neigh_ifinfo->refcount);
@@ -532,15 +525,11 @@ batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface,
if (hardif_neigh)
goto out;
- if (!kref_get_unless_zero(&hard_iface->refcount))
- goto out;
-
hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC);
- if (!hardif_neigh) {
- batadv_hardif_put(hard_iface);
+ if (!hardif_neigh)
goto out;
- }
+ kref_get(&hard_iface->refcount);
INIT_HLIST_NODE(&hardif_neigh->list);
ether_addr_copy(hardif_neigh->addr, neigh_addr);
hardif_neigh->if_incoming = hard_iface;
@@ -643,16 +632,11 @@ batadv_neigh_node_new(struct batadv_orig_node *orig_node,
if (!neigh_node)
goto out;
- if (!kref_get_unless_zero(&hard_iface->refcount)) {
- kfree(neigh_node);
- neigh_node = NULL;
- goto out;
- }
-
INIT_HLIST_NODE(&neigh_node->list);
INIT_HLIST_HEAD(&neigh_node->ifinfo_list);
spin_lock_init(&neigh_node->ifinfo_lock);
+ kref_get(&hard_iface->refcount);
ether_addr_copy(neigh_node->addr, neigh_addr);
neigh_node->if_incoming = hard_iface;
neigh_node->orig_node = orig_node;
@@ -1160,6 +1144,9 @@ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
if (hard_iface->soft_iface != bat_priv->soft_iface)
continue;
+ if (!kref_get_unless_zero(&hard_iface->refcount))
+ continue;
+
best_neigh_node = batadv_find_best_neighbor(bat_priv,
orig_node,
hard_iface);
@@ -1167,6 +1154,8 @@ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
best_neigh_node);
if (best_neigh_node)
batadv_neigh_node_put(best_neigh_node);
+
+ batadv_hardif_put(hard_iface);
}
rcu_read_unlock();
diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h
index 4e8b67f11051..64a8951e5844 100644
--- a/net/batman-adv/originator.h
+++ b/net/batman-adv/originator.h
@@ -33,7 +33,7 @@
struct seq_file;
-int batadv_compare_orig(const struct hlist_node *node, const void *data2);
+bool batadv_compare_orig(const struct hlist_node *node, const void *data2);
int batadv_originator_init(struct batadv_priv *bat_priv);
void batadv_originator_free(struct batadv_priv *bat_priv);
void batadv_purge_orig_ref(struct batadv_priv *bat_priv);
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 0796dfdfbb60..372128ddb474 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -175,6 +175,7 @@ enum batadv_bla_claimframe {
BATADV_CLAIM_TYPE_UNCLAIM = 0x01,
BATADV_CLAIM_TYPE_ANNOUNCE = 0x02,
BATADV_CLAIM_TYPE_REQUEST = 0x03,
+ BATADV_CLAIM_TYPE_LOOPDETECT = 0x04,
};
/**
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index b781bf753250..ae850f2d11cb 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -100,10 +100,6 @@ static void _batadv_update_route(struct batadv_priv *bat_priv,
if (curr_router)
batadv_neigh_node_put(curr_router);
- /* increase refcount of new best neighbor */
- if (neigh_node && !kref_get_unless_zero(&neigh_node->refcount))
- neigh_node = NULL;
-
spin_lock_bh(&orig_node->neigh_list_lock);
/* curr_router used earlier may not be the current orig_ifinfo->router
* anymore because it was dereferenced outside of the neigh_list_lock
@@ -114,6 +110,10 @@ static void _batadv_update_route(struct batadv_priv *bat_priv,
*/
curr_router = rcu_dereference_protected(orig_ifinfo->router, true);
+ /* increase refcount of new best neighbor */
+ if (neigh_node)
+ kref_get(&neigh_node->refcount);
+
rcu_assign_pointer(orig_ifinfo->router, neigh_node);
spin_unlock_bh(&orig_node->neigh_list_lock);
batadv_orig_ifinfo_put(orig_ifinfo);
@@ -163,18 +163,18 @@ out:
* doesn't change otherwise.
*
* Return:
- * 0 if the packet is to be accepted.
- * 1 if the packet is to be ignored.
+ * false if the packet is to be accepted.
+ * true if the packet is to be ignored.
*/
-int batadv_window_protected(struct batadv_priv *bat_priv, s32 seq_num_diff,
- s32 seq_old_max_diff, unsigned long *last_reset,
- bool *protection_started)
+bool batadv_window_protected(struct batadv_priv *bat_priv, s32 seq_num_diff,
+ s32 seq_old_max_diff, unsigned long *last_reset,
+ bool *protection_started)
{
if (seq_num_diff <= -seq_old_max_diff ||
seq_num_diff >= BATADV_EXPECTED_SEQNO_RANGE) {
if (!batadv_has_timed_out(*last_reset,
BATADV_RESET_PROTECTION_MS))
- return 1;
+ return true;
*last_reset = jiffies;
if (protection_started)
@@ -183,7 +183,7 @@ int batadv_window_protected(struct batadv_priv *bat_priv, s32 seq_num_diff,
"old packet received, start protection\n");
}
- return 0;
+ return false;
}
bool batadv_check_management_packet(struct sk_buff *skb,
@@ -718,8 +718,9 @@ out:
return ret;
}
-static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
- struct sk_buff *skb, int hdr_len) {
+static bool batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
+ struct sk_buff *skb, int hdr_len)
+{
struct batadv_unicast_packet *unicast_packet;
struct batadv_hard_iface *primary_if;
struct batadv_orig_node *orig_node;
@@ -730,11 +731,11 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
/* check if there is enough data before accessing it */
if (!pskb_may_pull(skb, hdr_len + ETH_HLEN))
- return 0;
+ return false;
/* create a copy of the skb (in case of for re-routing) to modify it. */
if (skb_cow(skb, sizeof(*unicast_packet)) < 0)
- return 0;
+ return false;
unicast_packet = (struct batadv_unicast_packet *)skb->data;
vid = batadv_get_vid(skb, hdr_len);
@@ -758,7 +759,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
* table. If not, let the packet go untouched anyway because
* there is nothing the node can do
*/
- return 1;
+ return true;
}
/* retrieve the TTVN known by this node for the packet destination. This
@@ -774,7 +775,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
* not be possible to deliver it
*/
if (!orig_node)
- return 0;
+ return false;
curr_ttvn = (u8)atomic_read(&orig_node->last_ttvn);
batadv_orig_node_put(orig_node);
@@ -785,7 +786,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
*/
is_old_ttvn = batadv_seq_before(unicast_packet->ttvn, curr_ttvn);
if (!is_old_ttvn)
- return 1;
+ return true;
old_ttvn = unicast_packet->ttvn;
/* the packet was forged based on outdated network information. Its
@@ -798,7 +799,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
"Rerouting unicast packet to %pM (dst=%pM): TTVN mismatch old_ttvn=%u new_ttvn=%u\n",
unicast_packet->dest, ethhdr->h_dest,
old_ttvn, curr_ttvn);
- return 1;
+ return true;
}
/* the packet has not been re-routed: either the destination is
@@ -806,14 +807,14 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
* it is possible to drop the packet
*/
if (!batadv_is_my_client(bat_priv, ethhdr->h_dest, vid))
- return 0;
+ return false;
/* update the header in order to let the packet be delivered to this
* node's soft interface
*/
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
- return 0;
+ return false;
ether_addr_copy(unicast_packet->dest, primary_if->net_dev->dev_addr);
@@ -821,7 +822,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
unicast_packet->ttvn = curr_ttvn;
- return 1;
+ return true;
}
/**
@@ -912,7 +913,7 @@ int batadv_recv_unicast_packet(struct sk_buff *skb,
hdr_size))
goto rx_success;
- batadv_interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size,
+ batadv_interface_rx(recv_if->soft_iface, skb, hdr_size,
orig_node);
rx_success:
@@ -1122,8 +1123,7 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
goto rx_success;
/* broadcast for me */
- batadv_interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size,
- orig_node);
+ batadv_interface_rx(recv_if->soft_iface, skb, hdr_size, orig_node);
rx_success:
ret = NET_RX_SUCCESS;
diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h
index 02a5caa84127..05c3ff42e181 100644
--- a/net/batman-adv/routing.h
+++ b/net/batman-adv/routing.h
@@ -51,8 +51,8 @@ struct batadv_neigh_node *
batadv_find_router(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
struct batadv_hard_iface *recv_if);
-int batadv_window_protected(struct batadv_priv *bat_priv, s32 seq_num_diff,
- s32 seq_old_max_diff, unsigned long *last_reset,
- bool *protection_started);
+bool batadv_window_protected(struct batadv_priv *bat_priv, s32 seq_num_diff,
+ s32 seq_old_max_diff, unsigned long *last_reset,
+ bool *protection_started);
#endif /* _NET_BATMAN_ADV_ROUTING_H_ */
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 99ea9001cf8a..f2f125684ed9 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -26,6 +26,7 @@
#include <linux/if.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
+#include <linux/kref.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/printk.h>
@@ -577,10 +578,15 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work)
if (forw_packet->num_packets >= hard_iface->num_bcasts)
continue;
+ 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();
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index dfb4d56120b6..343d2c904399 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -186,7 +186,6 @@ static int batadv_interface_tx(struct sk_buff *skb,
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
struct batadv_hard_iface *primary_if = NULL;
struct batadv_bcast_packet *bcast_packet;
- __be16 ethertype = htons(ETH_P_BATMAN);
static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
0x00, 0x00};
static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
@@ -216,7 +215,8 @@ static int batadv_interface_tx(struct sk_buff *skb,
case ETH_P_8021Q:
vhdr = vlan_eth_hdr(skb);
- if (vhdr->h_vlan_encapsulated_proto != ethertype) {
+ /* drop batman-in-batman packets to prevent loops */
+ if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) {
network_offset += VLAN_HLEN;
break;
}
@@ -385,7 +385,6 @@ end:
* batadv_interface_rx - receive ethernet frame on local batman-adv interface
* @soft_iface: local interface which will receive the ethernet frame
* @skb: ethernet frame for @soft_iface
- * @recv_if: interface on which the batman-adv packet was received
* @hdr_size: size of already parsed batman-adv header
* @orig_node: originator from which the batman-adv packet was sent
*
@@ -400,12 +399,11 @@ end:
* isolated clients.
*/
void batadv_interface_rx(struct net_device *soft_iface,
- struct sk_buff *skb, struct batadv_hard_iface *recv_if,
- int hdr_size, struct batadv_orig_node *orig_node)
+ struct sk_buff *skb, int hdr_size,
+ struct batadv_orig_node *orig_node)
{
struct batadv_bcast_packet *batadv_bcast_packet;
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
- __be16 ethertype = htons(ETH_P_BATMAN);
struct vlan_ethhdr *vhdr;
struct ethhdr *ethhdr;
unsigned short vid;
@@ -414,10 +412,6 @@ void batadv_interface_rx(struct net_device *soft_iface,
batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
- /* check if enough space is available for pulling, and pull */
- if (!pskb_may_pull(skb, hdr_size))
- goto dropped;
-
skb_pull_rcsum(skb, hdr_size);
skb_reset_mac_header(skb);
@@ -439,7 +433,8 @@ void batadv_interface_rx(struct net_device *soft_iface,
vhdr = (struct vlan_ethhdr *)skb->data;
- if (vhdr->h_vlan_encapsulated_proto != ethertype)
+ /* drop batman-in-batman packets to prevent loops */
+ if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))
break;
/* fall through */
@@ -890,13 +885,14 @@ static int batadv_softif_slave_add(struct net_device *dev,
struct net_device *slave_dev)
{
struct batadv_hard_iface *hard_iface;
+ struct net *net = dev_net(dev);
int ret = -EINVAL;
hard_iface = batadv_hardif_get_by_netdev(slave_dev);
if (!hard_iface || hard_iface->soft_iface)
goto out;
- ret = batadv_hardif_enable_interface(hard_iface, dev->name);
+ ret = batadv_hardif_enable_interface(hard_iface, net, dev->name);
out:
if (hard_iface)
@@ -977,7 +973,7 @@ static void batadv_softif_init_early(struct net_device *dev)
dev->netdev_ops = &batadv_netdev_ops;
dev->destructor = batadv_softif_free;
- dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+ dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
dev->priv_flags |= IFF_NO_QUEUE;
/* can't call min_mtu, because the needed variables
@@ -993,7 +989,7 @@ static void batadv_softif_init_early(struct net_device *dev)
memset(priv, 0, sizeof(*priv));
}
-struct net_device *batadv_softif_create(const char *name)
+struct net_device *batadv_softif_create(struct net *net, const char *name)
{
struct net_device *soft_iface;
int ret;
@@ -1003,6 +999,8 @@ struct net_device *batadv_softif_create(const char *name)
if (!soft_iface)
return NULL;
+ dev_net_set(soft_iface, net);
+
soft_iface->rtnl_link_ops = &batadv_link_ops;
ret = register_netdevice(soft_iface);
@@ -1047,12 +1045,12 @@ static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
unregister_netdevice_queue(soft_iface, head);
}
-int batadv_softif_is_valid(const struct net_device *net_dev)
+bool batadv_softif_is_valid(const struct net_device *net_dev)
{
if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
- return 1;
+ return true;
- return 0;
+ return false;
}
struct rtnl_link_ops batadv_link_ops __read_mostly = {
diff --git a/net/batman-adv/soft-interface.h b/net/batman-adv/soft-interface.h
index 9ae265703d23..ec303ddbf647 100644
--- a/net/batman-adv/soft-interface.h
+++ b/net/batman-adv/soft-interface.h
@@ -20,18 +20,20 @@
#include "main.h"
+#include <linux/types.h>
#include <net/rtnetlink.h>
struct net_device;
+struct net;
struct sk_buff;
int batadv_skb_head_push(struct sk_buff *skb, unsigned int len);
void batadv_interface_rx(struct net_device *soft_iface,
- struct sk_buff *skb, struct batadv_hard_iface *recv_if,
- int hdr_size, struct batadv_orig_node *orig_node);
-struct net_device *batadv_softif_create(const char *name);
+ struct sk_buff *skb, int hdr_size,
+ struct batadv_orig_node *orig_node);
+struct net_device *batadv_softif_create(struct net *net, const char *name);
void batadv_softif_destroy_sysfs(struct net_device *soft_iface);
-int batadv_softif_is_valid(const struct net_device *net_dev);
+bool batadv_softif_is_valid(const struct net_device *net_dev);
extern struct rtnl_link_ops batadv_link_ops;
int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid);
void batadv_softif_vlan_put(struct batadv_softif_vlan *softif_vlan);
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index e7cf51333a36..414b2074165f 100644
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -116,11 +116,13 @@ batadv_kobj_to_vlan(struct batadv_priv *bat_priv, struct kobject *obj)
static char *batadv_uev_action_str[] = {
"add",
"del",
- "change"
+ "change",
+ "loopdetect",
};
static char *batadv_uev_type_str[] = {
- "gw"
+ "gw",
+ "bla",
};
/* Use this, if you have customized show and store functions for vlan attrs */
@@ -830,6 +832,7 @@ static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
size_t count)
{
struct net_device *net_dev = batadv_kobj_to_netdev(kobj);
+ struct net *net = dev_net(net_dev);
struct batadv_hard_iface *hard_iface;
int status_tmp = -1;
int ret = count;
@@ -873,7 +876,7 @@ static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
batadv_hardif_disable_interface(hard_iface,
BATADV_IF_CLEANUP_AUTO);
- ret = batadv_hardif_enable_interface(hard_iface, buff);
+ ret = batadv_hardif_enable_interface(hard_iface, net, buff);
unlock:
rtnl_unlock();
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 942b3aa00bed..feaf492b01ca 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -43,7 +43,6 @@
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/workqueue.h>
-#include <net/net_namespace.h>
#include "bridge_loop_avoidance.h"
#include "hard-interface.h"
@@ -76,9 +75,9 @@ static void batadv_tt_global_del(struct batadv_priv *bat_priv,
*
* Compare the MAC address and the VLAN ID of the two TT entries and check if
* they are the same TT client.
- * Return: 1 if the two TT clients are the same, 0 otherwise
+ * Return: true if the two TT clients are the same, false otherwise
*/
-static int batadv_compare_tt(const struct hlist_node *node, const void *data2)
+static bool batadv_compare_tt(const struct hlist_node *node, const void *data2)
{
const void *data1 = container_of(node, struct batadv_tt_common_entry,
hash_entry);
@@ -585,6 +584,7 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
struct batadv_tt_local_entry *tt_local;
struct batadv_tt_global_entry *tt_global = NULL;
+ struct net *net = dev_net(soft_iface);
struct batadv_softif_vlan *vlan;
struct net_device *in_dev = NULL;
struct hlist_head *head;
@@ -596,7 +596,7 @@ bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr,
u32 match_mark;
if (ifindex != BATADV_NULL_IFINDEX)
- in_dev = dev_get_by_index(&init_net, ifindex);
+ in_dev = dev_get_by_index(net, ifindex);
tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid);
@@ -2361,19 +2361,19 @@ unlock:
* @entry_ptr: to be checked local tt entry
* @data_ptr: not used but definition required to satisfy the callback prototype
*
- * Return: 1 if the entry is a valid, 0 otherwise.
+ * Return: true if the entry is a valid, false otherwise.
*/
-static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr)
+static bool batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr)
{
const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
- return 0;
- return 1;
+ return false;
+ return true;
}
-static int batadv_tt_global_valid(const void *entry_ptr,
- const void *data_ptr)
+static bool batadv_tt_global_valid(const void *entry_ptr,
+ const void *data_ptr)
{
const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
const struct batadv_tt_global_entry *tt_global_entry;
@@ -2381,7 +2381,7 @@ static int batadv_tt_global_valid(const void *entry_ptr,
if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM ||
tt_common_entry->flags & BATADV_TT_CLIENT_TEMP)
- return 0;
+ return false;
tt_global_entry = container_of(tt_common_entry,
struct batadv_tt_global_entry,
@@ -2403,7 +2403,8 @@ static int batadv_tt_global_valid(const void *entry_ptr,
static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
struct batadv_hashtable *hash,
void *tvlv_buff, u16 tt_len,
- int (*valid_cb)(const void *, const void *),
+ bool (*valid_cb)(const void *,
+ const void *),
void *cb_data)
{
struct batadv_tt_common_entry *tt_common_entry;
@@ -2552,11 +2553,11 @@ static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv,
*
* Return: true if the TT Request was sent, false otherwise
*/
-static int batadv_send_tt_request(struct batadv_priv *bat_priv,
- struct batadv_orig_node *dst_orig_node,
- u8 ttvn,
- struct batadv_tvlv_tt_vlan_data *tt_vlan,
- u16 num_vlan, bool full_table)
+static bool batadv_send_tt_request(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *dst_orig_node,
+ u8 ttvn,
+ struct batadv_tvlv_tt_vlan_data *tt_vlan,
+ u16 num_vlan, bool full_table)
{
struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
struct batadv_tt_req_node *tt_req_node = NULL;
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 1e47fbe8bb7b..6a577f4f8ba7 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -657,6 +657,9 @@ struct batadv_priv_tt {
* @num_requests: number of bla requests in flight
* @claim_hash: hash table containing mesh nodes this host has claimed
* @backbone_hash: hash table containing all detected backbone gateways
+ * @loopdetect_addr: MAC address used for own loopdetection frames
+ * @loopdetect_lasttime: time when the loopdetection frames were sent
+ * @loopdetect_next: how many periods to wait for the next loopdetect process
* @bcast_duplist: recently received broadcast packets array (for broadcast
* duplicate suppression)
* @bcast_duplist_curr: index of last broadcast packet added to bcast_duplist
@@ -668,6 +671,9 @@ struct batadv_priv_bla {
atomic_t num_requests;
struct batadv_hashtable *claim_hash;
struct batadv_hashtable *backbone_hash;
+ u8 loopdetect_addr[ETH_ALEN];
+ unsigned long loopdetect_lasttime;
+ atomic_t loopdetect_next;
struct batadv_bcast_duplist_entry bcast_duplist[BATADV_DUPLIST_SIZE];
int bcast_duplist_curr;
/* protects bcast_duplist & bcast_duplist_curr */
@@ -1012,6 +1018,7 @@ struct batadv_socket_packet {
* resolved
* @crc: crc16 checksum over all claims
* @crc_lock: lock protecting crc
+ * @report_work: work struct for reporting detected loops
* @refcount: number of contexts the object is used
* @rcu: struct used for freeing in an RCU-safe manner
*/
@@ -1025,6 +1032,7 @@ struct batadv_bla_backbone_gw {
atomic_t request_sent;
u16 crc;
spinlock_t crc_lock; /* protects crc */
+ struct work_struct report_work;
struct kref refcount;
struct rcu_head rcu;
};