* [B.A.T.M.A.N.] [PATCH 01/12] batman-adv: Move compare_orig to originator.c
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
@ 2011-06-20 10:16 ` Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 02/12] batman-adv: Keep interface_tx as local function Sven Eckelmann
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:16 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n
compare_orig is only used in context of orig_node which is managed
inside originator.c. It is not necessary to keep that function inside
the header originator.h.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/originator.c | 8 ++++++++
net/batman-adv/originator.h | 8 --------
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index a6c35d4..991a6e7 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -37,6 +37,14 @@ static void start_purge_timer(struct bat_priv *bat_priv)
queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
}
+/* returns 1 if they are the same originator */
+static int compare_orig(const struct hlist_node *node, const void *data2)
+{
+ const void *data1 = container_of(node, struct orig_node, hash_entry);
+
+ return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
+}
+
int originator_init(struct bat_priv *bat_priv)
{
if (bat_priv->orig_hash)
diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h
index 8e307af..cfc1f60 100644
--- a/net/batman-adv/originator.h
+++ b/net/batman-adv/originator.h
@@ -40,14 +40,6 @@ int orig_hash_add_if(struct hard_iface *hard_iface, int max_if_num);
int orig_hash_del_if(struct hard_iface *hard_iface, int max_if_num);
-/* returns 1 if they are the same originator */
-static inline int compare_orig(const struct hlist_node *node, const void *data2)
-{
- const void *data1 = container_of(node, struct orig_node, hash_entry);
-
- return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
-}
-
/* hashfunction to choose an entry in a hash table of given size */
/* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
static inline int choose_orig(const void *data, int32_t size)
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 02/12] batman-adv: Keep interface_tx as local function
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 01/12] batman-adv: Move compare_orig to originator.c Sven Eckelmann
@ 2011-06-20 10:16 ` Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 03/12] batman-adv: count_real_packets() in batman-adv assumes char is signed Sven Eckelmann
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:16 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n
interface_tx is not used outside of soft-interface.c and thus doesn't
need to be declared inside soft-interface.h
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/soft-interface.c | 2 +-
net/batman-adv/soft-interface.h | 1 -
2 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index b8d3f248..0fc997e 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -553,7 +553,7 @@ static int interface_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
-int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
+static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct bat_priv *bat_priv = netdev_priv(soft_iface);
diff --git a/net/batman-adv/soft-interface.h b/net/batman-adv/soft-interface.h
index c24906d..001546f 100644
--- a/net/batman-adv/soft-interface.h
+++ b/net/batman-adv/soft-interface.h
@@ -25,7 +25,6 @@
int my_skb_head_push(struct sk_buff *skb, unsigned int len);
int softif_neigh_seq_print_text(struct seq_file *seq, void *offset);
void softif_neigh_purge(struct bat_priv *bat_priv);
-int interface_tx(struct sk_buff *skb, struct net_device *soft_iface);
void interface_rx(struct net_device *soft_iface,
struct sk_buff *skb, struct hard_iface *recv_if,
int hdr_size);
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 03/12] batman-adv: count_real_packets() in batman-adv assumes char is signed
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 01/12] batman-adv: Move compare_orig to originator.c Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 02/12] batman-adv: Keep interface_tx as local function Sven Eckelmann
@ 2011-06-20 10:16 ` Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 04/12] batman-adv: Reduce usage of char Sven Eckelmann
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:16 UTC (permalink / raw)
To: davem; +Cc: David Howells, netdev, b.a.t.m.a.n
From: David Howells <dhowells@redhat.com>
count_real_packets() in batman-adv assumes char is signed, and returns -1
through it:
net/batman-adv/routing.c: In function 'receive_bat_packet':
net/batman-adv/routing.c:739: warning: comparison is always false due to limited range of data type
Use int instead.
Signed-off-by: David Howells <dhowells@redhat.com>
[sven@narfation.org: Rebase on top of current version]
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/bitarray.c | 4 ++--
net/batman-adv/bitarray.h | 4 ++--
net/batman-adv/routing.c | 8 ++++----
3 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c
index 700ee4f..3659a25 100644
--- a/net/batman-adv/bitarray.c
+++ b/net/batman-adv/bitarray.c
@@ -26,8 +26,8 @@
/* returns true if the corresponding bit in the given seq_bits indicates true
* and curr_seqno is within range of last_seqno */
-uint8_t get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
- uint32_t curr_seqno)
+int get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
+ uint32_t curr_seqno)
{
int32_t diff, word_offset, word_num;
diff --git a/net/batman-adv/bitarray.h b/net/batman-adv/bitarray.h
index e32eb2d..277c037 100644
--- a/net/batman-adv/bitarray.h
+++ b/net/batman-adv/bitarray.h
@@ -26,8 +26,8 @@
/* returns true if the corresponding bit in the given seq_bits indicates true
* and curr_seqno is within range of last_seqno */
-uint8_t get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
- uint32_t curr_seqno);
+int get_bit_status(const unsigned long *seq_bits, uint32_t last_seqno,
+ uint32_t curr_seqno);
/* turn corresponding bit on, so we can remember that we got the packet */
void bit_mark(unsigned long *seq_bits, int32_t n);
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 934f1f2..d5ce644 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -361,7 +361,7 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
const struct batman_packet *batman_packet,
struct hard_iface *if_incoming,
const unsigned char *tt_buff, int tt_buff_len,
- char is_duplicate)
+ int is_duplicate)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
struct neigh_node *router = NULL;
@@ -528,7 +528,7 @@ static int window_protected(struct bat_priv *bat_priv,
* -1 the packet is old and has been received while the seqno window
* was protected. Caller should drop it.
*/
-static char count_real_packets(const struct ethhdr *ethhdr,
+static int count_real_packets(const struct ethhdr *ethhdr,
const struct batman_packet *batman_packet,
const struct hard_iface *if_incoming)
{
@@ -536,7 +536,7 @@ static char count_real_packets(const struct ethhdr *ethhdr,
struct orig_node *orig_node;
struct neigh_node *tmp_neigh_node;
struct hlist_node *node;
- char is_duplicate = 0;
+ int is_duplicate = 0;
int32_t seq_diff;
int need_update = 0;
int set_mark, ret = -1;
@@ -605,7 +605,7 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
char has_directlink_flag;
char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
char is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
- char is_duplicate;
+ int is_duplicate;
uint32_t if_incoming_seqno;
/* Silently drop when the batman packet is actually not a
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 04/12] batman-adv: Reduce usage of char
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (2 preceding siblings ...)
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 03/12] batman-adv: count_real_packets() in batman-adv assumes char is signed Sven Eckelmann
@ 2011-06-20 10:16 ` Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 05/12] batman-adv: Unify the first 3 bytes in each packet Sven Eckelmann
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:16 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n
char was used in different places to store information without really
using the characteristics of that data type or by ignoring the fact that
char has not a well defined signedness.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/aggregation.c | 2 +-
net/batman-adv/aggregation.h | 2 +-
net/batman-adv/bitarray.c | 4 ++--
net/batman-adv/bitarray.h | 4 ++--
net/batman-adv/gateway_client.c | 2 +-
net/batman-adv/gateway_common.c | 6 +++---
net/batman-adv/main.h | 2 +-
net/batman-adv/routing.c | 8 ++++----
net/batman-adv/send.c | 6 +++---
net/batman-adv/send.h | 2 +-
net/batman-adv/soft-interface.c | 2 +-
11 files changed, 20 insertions(+), 20 deletions(-)
diff --git a/net/batman-adv/aggregation.c b/net/batman-adv/aggregation.c
index 4080970..29c6740 100644
--- a/net/batman-adv/aggregation.c
+++ b/net/batman-adv/aggregation.c
@@ -195,7 +195,7 @@ static void aggregate(struct forw_packet *forw_packet_aggr,
void add_bat_packet_to_list(struct bat_priv *bat_priv,
unsigned char *packet_buff, int packet_len,
- struct hard_iface *if_incoming, char own_packet,
+ struct hard_iface *if_incoming, int own_packet,
unsigned long send_time)
{
/**
diff --git a/net/batman-adv/aggregation.h b/net/batman-adv/aggregation.h
index fedeb8d..0547fd8 100644
--- a/net/batman-adv/aggregation.h
+++ b/net/batman-adv/aggregation.h
@@ -35,7 +35,7 @@ static inline int aggregated_packet(int buff_pos, int packet_len, int num_tt)
void add_bat_packet_to_list(struct bat_priv *bat_priv,
unsigned char *packet_buff, int packet_len,
- struct hard_iface *if_incoming, char own_packet,
+ struct hard_iface *if_incoming, int own_packet,
unsigned long send_time);
void receive_aggr_bat_packet(const struct ethhdr *ethhdr,
unsigned char *packet_buff, int packet_len,
diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c
index 3659a25..c1f4bfc 100644
--- a/net/batman-adv/bitarray.c
+++ b/net/batman-adv/bitarray.c
@@ -127,8 +127,8 @@ static void bit_reset_window(unsigned long *seq_bits)
* 1 if the window was moved (either new or very old)
* 0 if the window was not moved/shifted.
*/
-char bit_get_packet(void *priv, unsigned long *seq_bits,
- int32_t seq_num_diff, int8_t set_mark)
+int bit_get_packet(void *priv, unsigned long *seq_bits,
+ int32_t seq_num_diff, int set_mark)
{
struct bat_priv *bat_priv = priv;
diff --git a/net/batman-adv/bitarray.h b/net/batman-adv/bitarray.h
index 277c037..9c04422 100644
--- a/net/batman-adv/bitarray.h
+++ b/net/batman-adv/bitarray.h
@@ -35,8 +35,8 @@ void bit_mark(unsigned long *seq_bits, int32_t n);
/* receive and process one packet, returns 1 if received seq_num is considered
* new, 0 if old */
-char bit_get_packet(void *priv, unsigned long *seq_bits,
- int32_t seq_num_diff, int8_t set_mark);
+int bit_get_packet(void *priv, unsigned long *seq_bits,
+ int32_t seq_num_diff, int set_mark);
/* count the hamming weight, how many good packets did we receive? */
int bit_packet_count(const unsigned long *seq_bits);
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 24aee56..7248de2 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -360,7 +360,7 @@ void gw_node_purge(struct bat_priv *bat_priv)
struct gw_node *gw_node, *curr_gw;
struct hlist_node *node, *node_tmp;
unsigned long timeout = 2 * PURGE_TIMEOUT * HZ;
- char do_deselect = 0;
+ int do_deselect = 0;
curr_gw = gw_get_selected_gw_node(bat_priv);
diff --git a/net/batman-adv/gateway_common.c b/net/batman-adv/gateway_common.c
index e74307b..18661af 100644
--- a/net/batman-adv/gateway_common.c
+++ b/net/batman-adv/gateway_common.c
@@ -61,9 +61,9 @@ static void kbit_to_gw_bandwidth(int down, int up, long *gw_srv_class)
/* returns the up and downspeeds in kbit, calculated from the class */
void gw_bandwidth_to_kbit(uint8_t gw_srv_class, int *down, int *up)
{
- char sbit = (gw_srv_class & 0x80) >> 7;
- char dpart = (gw_srv_class & 0x78) >> 3;
- char upart = (gw_srv_class & 0x07);
+ int sbit = (gw_srv_class & 0x80) >> 7;
+ int dpart = (gw_srv_class & 0x78) >> 3;
+ int upart = (gw_srv_class & 0x07);
if (!gw_srv_class) {
*down = 0;
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index ed488cb..714a241 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -151,7 +151,7 @@ int debug_log(struct bat_priv *bat_priv, const char *fmt, ...) __printf(2, 3);
while (0)
#else /* !CONFIG_BATMAN_ADV_DEBUG */
__printf(3, 4)
-static inline void bat_dbg(char type __always_unused,
+static inline void bat_dbg(int type __always_unused,
struct bat_priv *bat_priv __always_unused,
const char *fmt __always_unused, ...)
{
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index d5ce644..eb6fb7d 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -163,7 +163,7 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
struct hlist_node *node;
- unsigned char total_count;
+ uint8_t total_count;
uint8_t orig_eq_count, neigh_rq_count, tq_own;
int tq_asym_penalty, ret = 0;
@@ -602,9 +602,9 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
struct orig_node *orig_neigh_node, *orig_node;
struct neigh_node *router = NULL, *router_router = NULL;
struct neigh_node *orig_neigh_router = NULL;
- char has_directlink_flag;
- char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
- char is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
+ int has_directlink_flag;
+ int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
+ int is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
int is_duplicate;
uint32_t if_incoming_seqno;
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index a1b8c31..be0d581 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -165,7 +165,7 @@ static void send_packet(struct forw_packet *forw_packet)
struct bat_priv *bat_priv;
struct batman_packet *batman_packet =
(struct batman_packet *)(forw_packet->skb->data);
- unsigned char directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
+ int directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
if (!forw_packet->if_incoming) {
pr_err("Error - can't forward packet: incoming iface not "
@@ -307,12 +307,12 @@ void schedule_own_packet(struct hard_iface *hard_iface)
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
- uint8_t directlink, int tt_buff_len,
+ int directlink, int tt_buff_len,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *router;
- unsigned char in_tq, in_ttl, tq_avg = 0;
+ uint8_t in_tq, in_ttl, tq_avg = 0;
unsigned long send_time;
if (batman_packet->ttl <= 1) {
diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h
index eceab87..6d9c14d 100644
--- a/net/batman-adv/send.h
+++ b/net/batman-adv/send.h
@@ -28,7 +28,7 @@ void schedule_own_packet(struct hard_iface *hard_iface);
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
- uint8_t directlink, int tt_buff_len,
+ int directlink, int tt_buff_len,
struct hard_iface *if_outgoing);
int add_bcast_packet_to_list(struct bat_priv *bat_priv,
const struct sk_buff *skb);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 0fc997e..69c0022 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -380,7 +380,7 @@ void softif_neigh_purge(struct bat_priv *bat_priv)
struct softif_neigh *softif_neigh, *curr_softif_neigh;
struct softif_neigh_vid *softif_neigh_vid;
struct hlist_node *node, *node_tmp, *node_tmp2;
- char do_deselect;
+ int do_deselect;
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh_vid, node,
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 05/12] batman-adv: Unify the first 3 bytes in each packet
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (3 preceding siblings ...)
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 04/12] batman-adv: Reduce usage of char Sven Eckelmann
@ 2011-06-20 10:16 ` Sven Eckelmann
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 06/12] batman-adv: improved client announcement mechanism Sven Eckelmann
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:16 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n
From: Antonio Quartulli <ordex@autistici.org>
The amount of duplicated code in the receive and routing code can be
reduced when all headers provide the packet type, version and ttl in the
same first bytes.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/packet.h | 30 ++++++++++++++++++------------
1 files changed, 18 insertions(+), 12 deletions(-)
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 9f77086..6ddbfd8 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -34,7 +34,7 @@ enum bat_packettype {
};
/* this file is included by batctl which needs these defines */
-#define COMPAT_VERSION 12
+#define COMPAT_VERSION 14
enum batman_flags {
PRIMARIES_FIRST_HOP = 1 << 4,
@@ -66,15 +66,15 @@ enum unicast_frag_flags {
struct batman_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
+ uint8_t ttl;
uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
- uint8_t tq;
uint32_t seqno;
uint8_t orig[6];
uint8_t prev_sender[6];
- uint8_t ttl;
- uint8_t num_tt;
uint8_t gw_flags; /* flags related to gateway class */
- uint8_t align;
+ uint8_t tq;
+ uint8_t num_tt;
+ uint8_t reserved;
} __packed;
#define BAT_PACKET_LEN sizeof(struct batman_packet)
@@ -82,12 +82,13 @@ struct batman_packet {
struct icmp_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t msg_type; /* see ICMP message types above */
uint8_t ttl;
+ uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[6];
uint8_t orig[6];
uint16_t seqno;
uint8_t uid;
+ uint8_t reserved;
} __packed;
#define BAT_RR_LEN 16
@@ -97,8 +98,8 @@ struct icmp_packet {
struct icmp_packet_rr {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t msg_type; /* see ICMP message types above */
uint8_t ttl;
+ uint8_t msg_type; /* see ICMP message types above */
uint8_t dst[6];
uint8_t orig[6];
uint16_t seqno;
@@ -110,16 +111,19 @@ struct icmp_packet_rr {
struct unicast_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t dest[6];
uint8_t ttl;
+ uint8_t reserved;
+ uint8_t dest[6];
} __packed;
struct unicast_frag_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t dest[6];
uint8_t ttl;
+ uint8_t reserved;
+ uint8_t dest[6];
uint8_t flags;
+ uint8_t align;
uint8_t orig[6];
uint16_t seqno;
} __packed;
@@ -127,18 +131,20 @@ struct unicast_frag_packet {
struct bcast_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
- uint8_t orig[6];
uint8_t ttl;
+ uint8_t reserved;
uint32_t seqno;
+ uint8_t orig[6];
} __packed;
struct vis_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
+ uint8_t ttl; /* TTL */
uint8_t vis_type; /* which type of vis-participant sent this? */
- uint8_t entries; /* number of entries behind this struct */
uint32_t seqno; /* sequence number */
- uint8_t ttl; /* TTL */
+ uint8_t entries; /* number of entries behind this struct */
+ uint8_t reserved;
uint8_t vis_orig[6]; /* originator that announces its neighbors */
uint8_t target_orig[6]; /* who should receive this packet */
uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 06/12] batman-adv: improved client announcement mechanism
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (4 preceding siblings ...)
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 05/12] batman-adv: Unify the first 3 bytes in each packet Sven Eckelmann
@ 2011-06-20 10:16 ` Sven Eckelmann
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 07/12] batman-adv: improved roaming mechanism Sven Eckelmann
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:16 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n, Marek Lindner
From: Antonio Quartulli <ordex@autistici.org>
The client announcement mechanism informs every mesh node in the network
of any connected non-mesh client, in order to find the path towards that
client from any given point in the mesh.
The old implementation was based on the simple idea of appending a data
buffer to each OGM containing all the client MAC addresses the node is
serving. All other nodes can populate their global translation tables
(table which links client MAC addresses to node addresses) using this
MAC address buffer and linking it to the node's address contained in the
OGM. A node that wants to contact a client has to lookup the node the
client is connected to and its address in the global translation table.
It is easy to understand that this implementation suffers from several
issues:
- big overhead (each and every OGM contains the entire list of
connected clients)
- high latencies for client route updates due to long OGM trip time and
OGM losses
The new implementation addresses these issues by appending client
changes (new client joined or a client left) to the OGM instead of
filling it with all the client addresses each time. In this way nodes
can modify their global tables by means of "updates", thus reducing the
overhead within the OGMs.
To keep the entire network in sync each node maintains a translation
table version number (ttvn) and a translation table checksum. These
values are spread with the OGM to allow all the network participants to
determine whether or not they need to update their translation table
information.
When a translation table lookup is performed in order to send a packet
to a client attached to another node, the destination's ttvn is added to
the payload packet. Forwarding nodes can compare the packet's ttvn with
their destination's ttvn (this node could have a fresher information
than the source) and re-route the packet if necessary. This greatly
reduces the packet loss of clients roaming from one AP to the next.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/Kconfig | 1 +
net/batman-adv/aggregation.c | 23 +-
net/batman-adv/aggregation.h | 6 +-
net/batman-adv/bat_sysfs.c | 2 +-
net/batman-adv/hard-interface.c | 13 +-
net/batman-adv/main.c | 13 +-
net/batman-adv/main.h | 7 +-
net/batman-adv/originator.c | 8 +-
net/batman-adv/packet.h | 59 ++-
net/batman-adv/routing.c | 248 +++++++--
net/batman-adv/routing.h | 6 +-
net/batman-adv/send.c | 87 +++-
net/batman-adv/send.h | 2 +-
net/batman-adv/soft-interface.c | 11 +-
net/batman-adv/translation-table.c | 1134 ++++++++++++++++++++++++++++++------
net/batman-adv/translation-table.h | 34 +-
net/batman-adv/types.h | 33 +-
net/batman-adv/unicast.c | 3 +
18 files changed, 1383 insertions(+), 307 deletions(-)
diff --git a/net/batman-adv/Kconfig b/net/batman-adv/Kconfig
index 6c051ad..2b68d06 100644
--- a/net/batman-adv/Kconfig
+++ b/net/batman-adv/Kconfig
@@ -5,6 +5,7 @@
config BATMAN_ADV
tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
depends on NET
+ select CRC16
default n
---help---
diff --git a/net/batman-adv/aggregation.c b/net/batman-adv/aggregation.c
index 29c6740..c583e04 100644
--- a/net/batman-adv/aggregation.c
+++ b/net/batman-adv/aggregation.c
@@ -20,17 +20,12 @@
*/
#include "main.h"
+#include "translation-table.h"
#include "aggregation.h"
#include "send.h"
#include "routing.h"
#include "hard-interface.h"
-/* calculate the size of the tt information for a given packet */
-static int tt_len(const struct batman_packet *batman_packet)
-{
- return batman_packet->num_tt * ETH_ALEN;
-}
-
/* return true if new_packet can be aggregated with forw_packet */
static bool can_aggregate_with(const struct batman_packet *new_batman_packet,
int packet_len,
@@ -264,18 +259,20 @@ void receive_aggr_bat_packet(const struct ethhdr *ethhdr,
batman_packet = (struct batman_packet *)packet_buff;
do {
- /* network to host order for our 32bit seqno, and the
- orig_interval. */
+ /* network to host order for our 32bit seqno and the
+ orig_interval */
batman_packet->seqno = ntohl(batman_packet->seqno);
+ batman_packet->tt_crc = ntohs(batman_packet->tt_crc);
tt_buff = packet_buff + buff_pos + BAT_PACKET_LEN;
- receive_bat_packet(ethhdr, batman_packet,
- tt_buff, tt_len(batman_packet),
- if_incoming);
- buff_pos += BAT_PACKET_LEN + tt_len(batman_packet);
+ receive_bat_packet(ethhdr, batman_packet, tt_buff, if_incoming);
+
+ buff_pos += BAT_PACKET_LEN +
+ tt_len(batman_packet->tt_num_changes);
+
batman_packet = (struct batman_packet *)
(packet_buff + buff_pos);
} while (aggregated_packet(buff_pos, packet_len,
- batman_packet->num_tt));
+ batman_packet->tt_num_changes));
}
diff --git a/net/batman-adv/aggregation.h b/net/batman-adv/aggregation.h
index 0547fd8..216337b 100644
--- a/net/batman-adv/aggregation.h
+++ b/net/batman-adv/aggregation.h
@@ -25,9 +25,11 @@
#include "main.h"
/* is there another aggregated packet here? */
-static inline int aggregated_packet(int buff_pos, int packet_len, int num_tt)
+static inline int aggregated_packet(int buff_pos, int packet_len,
+ int tt_num_changes)
{
- int next_buff_pos = buff_pos + BAT_PACKET_LEN + (num_tt * ETH_ALEN);
+ int next_buff_pos = buff_pos + BAT_PACKET_LEN + (tt_num_changes *
+ sizeof(struct tt_change));
return (next_buff_pos <= packet_len) &&
(next_buff_pos <= MAX_AGGREGATION_BYTES);
diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index 924d577..63738ec 100644
--- a/net/batman-adv/bat_sysfs.c
+++ b/net/batman-adv/bat_sysfs.c
@@ -375,7 +375,7 @@ BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
store_gw_bwidth);
#ifdef CONFIG_BATMAN_ADV_DEBUG
-BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 3, NULL);
+BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 7, NULL);
#endif
static struct bat_attribute *mesh_attrs[] = {
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index b55e861..d40426c 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -152,12 +152,6 @@ static void primary_if_select(struct bat_priv *bat_priv,
batman_packet->ttl = TTL;
primary_if_update_addr(bat_priv);
-
- /***
- * hacky trick to make sure that we send the TT information via
- * our new primary interface
- */
- atomic_set(&bat_priv->tt_local_changed, 1);
}
static bool hardif_is_iface_up(const struct hard_iface *hard_iface)
@@ -340,7 +334,8 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
batman_packet->flags = NO_FLAGS;
batman_packet->ttl = 2;
batman_packet->tq = TQ_MAX_VALUE;
- batman_packet->num_tt = 0;
+ batman_packet->tt_num_changes = 0;
+ batman_packet->ttvn = 0;
hard_iface->if_num = bat_priv->num_ifaces;
bat_priv->num_ifaces++;
@@ -659,6 +654,10 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
case BAT_VIS:
ret = recv_vis_packet(skb, hard_iface);
break;
+ /* Translation table query (request or response) */
+ case BAT_TT_QUERY:
+ ret = recv_tt_query(skb, hard_iface);
+ break;
default:
ret = NET_RX_DROP;
}
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 2d6445e..49a5e64 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -86,6 +86,9 @@ int mesh_init(struct net_device *soft_iface)
spin_lock_init(&bat_priv->forw_bcast_list_lock);
spin_lock_init(&bat_priv->tt_lhash_lock);
spin_lock_init(&bat_priv->tt_ghash_lock);
+ spin_lock_init(&bat_priv->tt_changes_list_lock);
+ spin_lock_init(&bat_priv->tt_req_list_lock);
+ spin_lock_init(&bat_priv->tt_buff_lock);
spin_lock_init(&bat_priv->gw_list_lock);
spin_lock_init(&bat_priv->vis_hash_lock);
spin_lock_init(&bat_priv->vis_list_lock);
@@ -96,14 +99,13 @@ int mesh_init(struct net_device *soft_iface)
INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
INIT_HLIST_HEAD(&bat_priv->gw_list);
INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
+ INIT_LIST_HEAD(&bat_priv->tt_changes_list);
+ INIT_LIST_HEAD(&bat_priv->tt_req_list);
if (originator_init(bat_priv) < 1)
goto err;
- if (tt_local_init(bat_priv) < 1)
- goto err;
-
- if (tt_global_init(bat_priv) < 1)
+ if (tt_init(bat_priv) < 1)
goto err;
tt_local_add(soft_iface, soft_iface->dev_addr);
@@ -137,8 +139,7 @@ void mesh_free(struct net_device *soft_iface)
gw_node_purge(bat_priv);
originator_free(bat_priv);
- tt_local_free(bat_priv);
- tt_global_free(bat_priv);
+ tt_free(bat_priv);
softif_neigh_purge(bat_priv);
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 714a241..6f53a1d 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -46,11 +46,15 @@
/* sliding packet range of received originator messages in squence numbers
* (should be a multiple of our word size) */
#define TQ_LOCAL_WINDOW_SIZE 64
+#define TT_REQUEST_TIMEOUT 3 /* seconds we have to keep pending tt_req */
+
#define TQ_GLOBAL_WINDOW_SIZE 5
#define TQ_LOCAL_BIDRECT_SEND_MINIMUM 1
#define TQ_LOCAL_BIDRECT_RECV_MINIMUM 1
#define TQ_TOTAL_BIDRECT_LIMIT 1
+#define TT_OGM_APPEND_MAX 3 /* number of OGMs sent with the last tt diff */
+
#define NO_FLAGS 0
#define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE)
@@ -96,7 +100,8 @@ enum mesh_state {
enum dbg_level {
DBG_BATMAN = 1 << 0,
DBG_ROUTES = 1 << 1, /* route added / changed / deleted */
- DBG_ALL = 3
+ DBG_TT = 1 << 2, /* translation table operations */
+ DBG_ALL = 7
};
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 991a6e7..25e7e50 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -145,6 +145,7 @@ static void orig_node_free_rcu(struct rcu_head *rcu)
tt_global_del_orig(orig_node->bat_priv, orig_node,
"originator timed out");
+ kfree(orig_node->tt_buff);
kfree(orig_node->bcast_own);
kfree(orig_node->bcast_own_sum);
kfree(orig_node);
@@ -213,6 +214,7 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr)
spin_lock_init(&orig_node->ogm_cnt_lock);
spin_lock_init(&orig_node->bcast_seqno_lock);
spin_lock_init(&orig_node->neigh_list_lock);
+ spin_lock_init(&orig_node->tt_buff_lock);
/* extra reference for return */
atomic_set(&orig_node->refcount, 2);
@@ -221,6 +223,8 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr)
memcpy(orig_node->orig, addr, ETH_ALEN);
orig_node->router = NULL;
orig_node->tt_buff = NULL;
+ orig_node->tt_buff_len = 0;
+ atomic_set(&orig_node->tt_size, 0);
orig_node->bcast_seqno_reset = jiffies - 1
- msecs_to_jiffies(RESET_PROTECTION_MS);
orig_node->batman_seqno_reset = jiffies - 1
@@ -330,9 +334,7 @@ static bool purge_orig_node(struct bat_priv *bat_priv,
if (purge_orig_neighbors(bat_priv, orig_node,
&best_neigh_node)) {
update_routes(bat_priv, orig_node,
- best_neigh_node,
- orig_node->tt_buff,
- orig_node->tt_buff_len);
+ best_neigh_node);
}
}
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 6ddbfd8..407dd2e 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -30,7 +30,8 @@ enum bat_packettype {
BAT_UNICAST = 0x03,
BAT_BCAST = 0x04,
BAT_VIS = 0x05,
- BAT_UNICAST_FRAG = 0x06
+ BAT_UNICAST_FRAG = 0x06,
+ BAT_TT_QUERY = 0x07
};
/* this file is included by batctl which needs these defines */
@@ -63,6 +64,25 @@ enum unicast_frag_flags {
UNI_FRAG_LARGETAIL = 1 << 1
};
+/* TT_QUERY subtypes */
+#define TT_QUERY_TYPE_MASK 0x3
+
+enum tt_query_packettype {
+ TT_REQUEST = 0,
+ TT_RESPONSE = 1
+};
+
+/* TT_QUERY flags */
+enum tt_query_flags {
+ TT_FULL_TABLE = 1 << 2
+};
+
+/* TT_CHANGE flags */
+enum tt_change_flags {
+ TT_CHANGE_DEL = 0x01,
+ TT_CLIENT_ROAM = 0x02
+};
+
struct batman_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
@@ -73,8 +93,9 @@ struct batman_packet {
uint8_t prev_sender[6];
uint8_t gw_flags; /* flags related to gateway class */
uint8_t tq;
- uint8_t num_tt;
- uint8_t reserved;
+ uint8_t tt_num_changes;
+ uint8_t ttvn; /* translation table version number */
+ uint16_t tt_crc;
} __packed;
#define BAT_PACKET_LEN sizeof(struct batman_packet)
@@ -112,7 +133,7 @@ struct unicast_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
- uint8_t reserved;
+ uint8_t ttvn; /* destination translation table version number */
uint8_t dest[6];
} __packed;
@@ -120,7 +141,7 @@ struct unicast_frag_packet {
uint8_t packet_type;
uint8_t version; /* batman version field */
uint8_t ttl;
- uint8_t reserved;
+ uint8_t ttvn; /* destination translation table version number */
uint8_t dest[6];
uint8_t flags;
uint8_t align;
@@ -150,4 +171,32 @@ struct vis_packet {
uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
} __packed;
+struct tt_query_packet {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t ttl;
+ /* the flag field is a combination of:
+ * - TT_REQUEST or TT_RESPONSE
+ * - TT_FULL_TABLE */
+ uint8_t flags;
+ uint8_t dst[ETH_ALEN];
+ uint8_t src[ETH_ALEN];
+ /* the ttvn field is:
+ * if TT_REQUEST: ttvn that triggered the
+ * request
+ * if TT_RESPONSE: new ttvn for the src
+ * orig_node */
+ uint8_t ttvn;
+ /* tt_data field is:
+ * if TT_REQUEST: crc associated with the
+ * ttvn
+ * if TT_RESPONSE: table_size */
+ uint16_t tt_data;
+} __packed;
+
+struct tt_change {
+ uint8_t flags;
+ uint8_t addr[ETH_ALEN];
+} __packed;
+
#endif /* _NET_BATMAN_ADV_PACKET_H_ */
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index eb6fb7d..8b0f833 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -64,27 +64,56 @@ void slide_own_bcast_window(struct hard_iface *hard_iface)
}
}
-static void update_TT(struct bat_priv *bat_priv, struct orig_node *orig_node,
- const unsigned char *tt_buff, int tt_buff_len)
+static void update_transtable(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ const unsigned char *tt_buff,
+ uint8_t tt_num_changes, uint8_t ttvn,
+ uint16_t tt_crc)
{
- if ((tt_buff_len != orig_node->tt_buff_len) ||
- ((tt_buff_len > 0) &&
- (orig_node->tt_buff_len > 0) &&
- (memcmp(orig_node->tt_buff, tt_buff, tt_buff_len) != 0))) {
+ uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
+ bool full_table = true;
- if (orig_node->tt_buff_len > 0)
- tt_global_del_orig(bat_priv, orig_node,
- "originator changed tt");
+ /* the ttvn increased by one -> we can apply the attached changes */
+ if (ttvn - orig_ttvn == 1) {
+ /* the OGM could not contain the changes because they were too
+ * many to fit in one frame or because they have already been
+ * sent TT_OGM_APPEND_MAX times. In this case send a tt
+ * request */
+ if (!tt_num_changes) {
+ full_table = false;
+ goto request_table;
+ }
- if ((tt_buff_len > 0) && (tt_buff))
- tt_global_add_orig(bat_priv, orig_node,
- tt_buff, tt_buff_len);
+ tt_update_changes(bat_priv, orig_node, tt_num_changes, ttvn,
+ (struct tt_change *)tt_buff);
+
+ /* Even if we received the crc into the OGM, we prefer
+ * to recompute it to spot any possible inconsistency
+ * in the global table */
+ spin_lock_bh(&bat_priv->tt_ghash_lock);
+ orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
+ } else {
+ /* if we missed more than one change or our tables are not
+ * in sync anymore -> request fresh tt data */
+ if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
+request_table:
+ bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
+ "Need to retrieve the correct information "
+ "(ttvn: %u last_ttvn: %u crc: %u last_crc: "
+ "%u num_changes: %u)\n", orig_node->orig, ttvn,
+ orig_ttvn, tt_crc, orig_node->tt_crc,
+ tt_num_changes);
+ send_tt_request(bat_priv, orig_node, ttvn, tt_crc,
+ full_table);
+ return;
+ }
}
}
-static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
- struct neigh_node *neigh_node,
- const unsigned char *tt_buff, int tt_buff_len)
+static void update_route(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ struct neigh_node *neigh_node)
{
struct neigh_node *curr_router;
@@ -92,11 +121,10 @@ static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
/* route deleted */
if ((curr_router) && (!neigh_node)) {
-
bat_dbg(DBG_ROUTES, bat_priv, "Deleting route towards: %pM\n",
orig_node->orig);
tt_global_del_orig(bat_priv, orig_node,
- "originator timed out");
+ "Deleted route towards originator");
/* route added */
} else if ((!curr_router) && (neigh_node)) {
@@ -104,9 +132,6 @@ static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
bat_dbg(DBG_ROUTES, bat_priv,
"Adding route towards: %pM (via %pM)\n",
orig_node->orig, neigh_node->addr);
- tt_global_add_orig(bat_priv, orig_node,
- tt_buff, tt_buff_len);
-
/* route changed */
} else if (neigh_node && curr_router) {
bat_dbg(DBG_ROUTES, bat_priv,
@@ -133,8 +158,7 @@ static void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
}
void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
- struct neigh_node *neigh_node, const unsigned char *tt_buff,
- int tt_buff_len)
+ struct neigh_node *neigh_node)
{
struct neigh_node *router = NULL;
@@ -144,11 +168,7 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
router = orig_node_get_router(orig_node);
if (router != neigh_node)
- update_route(bat_priv, orig_node, neigh_node,
- tt_buff, tt_buff_len);
- /* may be just TT changed */
- else
- update_TT(bat_priv, orig_node, tt_buff, tt_buff_len);
+ update_route(bat_priv, orig_node, neigh_node);
out:
if (router)
@@ -360,14 +380,12 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
const struct ethhdr *ethhdr,
const struct batman_packet *batman_packet,
struct hard_iface *if_incoming,
- const unsigned char *tt_buff, int tt_buff_len,
- int is_duplicate)
+ const unsigned char *tt_buff, int is_duplicate)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
struct neigh_node *router = NULL;
struct orig_node *orig_node_tmp;
struct hlist_node *node;
- int tmp_tt_buff_len;
uint8_t bcast_own_sum_orig, bcast_own_sum_neigh;
bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
@@ -432,9 +450,6 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
bonding_candidate_add(orig_node, neigh_node);
- tmp_tt_buff_len = (tt_buff_len > batman_packet->num_tt * ETH_ALEN ?
- batman_packet->num_tt * ETH_ALEN : tt_buff_len);
-
/* if this neighbor already is our next hop there is nothing
* to change */
router = orig_node_get_router(orig_node);
@@ -464,15 +479,19 @@ static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
goto update_tt;
}
- update_routes(bat_priv, orig_node, neigh_node,
- tt_buff, tmp_tt_buff_len);
- goto update_gw;
+ update_routes(bat_priv, orig_node, neigh_node);
update_tt:
- update_routes(bat_priv, orig_node, router,
- tt_buff, tmp_tt_buff_len);
+ /* I have to check for transtable changes only if the OGM has been
+ * sent through a primary interface */
+ if (((batman_packet->orig != ethhdr->h_source) &&
+ (batman_packet->ttl > 2)) ||
+ (batman_packet->flags & PRIMARIES_FIRST_HOP))
+ update_transtable(bat_priv, orig_node, tt_buff,
+ batman_packet->tt_num_changes,
+ batman_packet->ttvn,
+ batman_packet->tt_crc);
-update_gw:
if (orig_node->gw_flags != batman_packet->gw_flags)
gw_node_update(bat_priv, orig_node, batman_packet->gw_flags);
@@ -594,7 +613,7 @@ out:
void receive_bat_packet(const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
- const unsigned char *tt_buff, int tt_buff_len,
+ const unsigned char *tt_buff,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
@@ -633,12 +652,14 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
bat_dbg(DBG_BATMAN, bat_priv,
"Received BATMAN packet via NB: %pM, IF: %s [%pM] "
- "(from OG: %pM, via prev OG: %pM, seqno %d, tq %d, "
- "TTL %d, V %d, IDF %d)\n",
+ "(from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, "
+ "crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
ethhdr->h_source, if_incoming->net_dev->name,
if_incoming->net_dev->dev_addr, batman_packet->orig,
batman_packet->prev_sender, batman_packet->seqno,
- batman_packet->tq, batman_packet->ttl, batman_packet->version,
+ batman_packet->ttvn, batman_packet->tt_crc,
+ batman_packet->tt_num_changes, batman_packet->tq,
+ batman_packet->ttl, batman_packet->version,
has_directlink_flag);
rcu_read_lock();
@@ -790,14 +811,14 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
((orig_node->last_real_seqno == batman_packet->seqno) &&
(orig_node->last_ttl - 3 <= batman_packet->ttl))))
update_orig(bat_priv, orig_node, ethhdr, batman_packet,
- if_incoming, tt_buff, tt_buff_len, is_duplicate);
+ if_incoming, tt_buff, is_duplicate);
/* is single hop (direct) neighbor */
if (is_single_hop_neigh) {
/* mark direct link on incoming interface */
schedule_forward_packet(orig_node, ethhdr, batman_packet,
- 1, tt_buff_len, if_incoming);
+ 1, if_incoming);
bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
"rebroadcast neighbor packet with direct link flag\n");
@@ -820,7 +841,7 @@ void receive_bat_packet(const struct ethhdr *ethhdr,
bat_dbg(DBG_BATMAN, bat_priv,
"Forwarding packet: rebroadcast originator packet\n");
schedule_forward_packet(orig_node, ethhdr, batman_packet,
- 0, tt_buff_len, if_incoming);
+ 0, if_incoming);
out_neigh:
if ((orig_neigh_node) && (!is_single_hop_neigh))
@@ -1167,6 +1188,70 @@ static struct neigh_node *find_ifalter_router(struct orig_node *primary_orig,
return router;
}
+int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
+ struct tt_query_packet *tt_query;
+ struct ethhdr *ethhdr;
+
+ /* drop packet if it has not necessary minimum size */
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct tt_query_packet))))
+ goto out;
+
+ /* I could need to modify it */
+ if (skb_cow(skb, sizeof(struct tt_query_packet)) < 0)
+ goto out;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with unicast indication but broadcast recipient */
+ if (is_broadcast_ether_addr(ethhdr->h_dest))
+ goto out;
+
+ /* packet with broadcast sender address */
+ if (is_broadcast_ether_addr(ethhdr->h_source))
+ goto out;
+
+ tt_query = (struct tt_query_packet *)skb->data;
+
+ tt_query->tt_data = ntohs(tt_query->tt_data);
+
+ switch (tt_query->flags & TT_QUERY_TYPE_MASK) {
+ case TT_REQUEST:
+ /* If we cannot provide an answer the tt_request is
+ * forwarded */
+ if (!send_tt_response(bat_priv, tt_query)) {
+ bat_dbg(DBG_TT, bat_priv,
+ "Routing TT_REQUEST to %pM [%c]\n",
+ tt_query->dst,
+ (tt_query->flags & TT_FULL_TABLE ? 'F' : '.'));
+ tt_query->tt_data = htons(tt_query->tt_data);
+ return route_unicast_packet(skb, recv_if);
+ }
+ break;
+ case TT_RESPONSE:
+ /* packet needs to be linearised to access the TT changes */
+ if (skb_linearize(skb) < 0)
+ goto out;
+
+ if (is_my_mac(tt_query->dst))
+ handle_tt_response(bat_priv, tt_query);
+ else {
+ bat_dbg(DBG_TT, bat_priv,
+ "Routing TT_RESPONSE to %pM [%c]\n",
+ tt_query->dst,
+ (tt_query->flags & TT_FULL_TABLE ? 'F' : '.'));
+ tt_query->tt_data = htons(tt_query->tt_data);
+ return route_unicast_packet(skb, recv_if);
+ }
+ break;
+ }
+
+out:
+ /* returning NET_RX_DROP will make the caller function kfree the skb */
+ return NET_RX_DROP;
+}
+
/* find a suitable router for this originator, and use
* bonding if possible. increases the found neighbors
* refcount.*/
@@ -1353,14 +1438,82 @@ out:
return ret;
}
+static int check_unicast_ttvn(struct bat_priv *bat_priv,
+ struct sk_buff *skb) {
+ uint8_t curr_ttvn;
+ struct orig_node *orig_node;
+ struct ethhdr *ethhdr;
+ struct hard_iface *primary_if;
+ struct unicast_packet *unicast_packet;
+
+ /* I could need to modify it */
+ if (skb_cow(skb, sizeof(struct unicast_packet)) < 0)
+ return 0;
+
+ unicast_packet = (struct unicast_packet *)skb->data;
+
+ if (is_my_mac(unicast_packet->dest))
+ curr_ttvn = (uint8_t)atomic_read(&bat_priv->ttvn);
+ else {
+ orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
+
+ if (!orig_node)
+ return 0;
+
+ curr_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
+ orig_node_free_ref(orig_node);
+ }
+
+ /* Check whether I have to reroute the packet */
+ if (seq_before(unicast_packet->ttvn, curr_ttvn)) {
+ /* Linearize the skb before accessing it */
+ if (skb_linearize(skb) < 0)
+ return 0;
+
+ ethhdr = (struct ethhdr *)(skb->data +
+ sizeof(struct unicast_packet));
+
+ orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+
+ if (!orig_node) {
+ if (!is_my_client(bat_priv, ethhdr->h_dest))
+ return 0;
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ return 0;
+ memcpy(unicast_packet->dest,
+ primary_if->net_dev->dev_addr, ETH_ALEN);
+ hardif_free_ref(primary_if);
+ } else {
+ memcpy(unicast_packet->dest, orig_node->orig,
+ ETH_ALEN);
+ curr_ttvn = (uint8_t)
+ atomic_read(&orig_node->last_ttvn);
+ orig_node_free_ref(orig_node);
+ }
+
+ bat_dbg(DBG_ROUTES, bat_priv, "TTVN mismatch (old_ttvn %u "
+ "new_ttvn %u)! Rerouting unicast packet (for %pM) to "
+ "%pM\n", unicast_packet->ttvn, curr_ttvn,
+ ethhdr->h_dest, unicast_packet->dest);
+
+ unicast_packet->ttvn = curr_ttvn;
+ }
+ return 1;
+}
+
int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
{
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
struct unicast_packet *unicast_packet;
int hdr_size = sizeof(*unicast_packet);
if (check_unicast_packet(skb, hdr_size) < 0)
return NET_RX_DROP;
+ if (!check_unicast_ttvn(bat_priv, skb))
+ return NET_RX_DROP;
+
unicast_packet = (struct unicast_packet *)skb->data;
/* packet for me */
@@ -1383,6 +1536,9 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if)
if (check_unicast_packet(skb, hdr_size) < 0)
return NET_RX_DROP;
+ if (!check_unicast_ttvn(bat_priv, skb))
+ return NET_RX_DROP;
+
unicast_packet = (struct unicast_frag_packet *)skb->data;
/* packet for me */
diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h
index 0ce0392..e77d464 100644
--- a/net/batman-adv/routing.h
+++ b/net/batman-adv/routing.h
@@ -25,11 +25,10 @@
void slide_own_bcast_window(struct hard_iface *hard_iface);
void receive_bat_packet(const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
- const unsigned char *tt_buff, int tt_buff_len,
+ const unsigned char *tt_buff,
struct hard_iface *if_incoming);
void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
- struct neigh_node *neigh_node, const unsigned char *tt_buff,
- int tt_buff_len);
+ struct neigh_node *neigh_node);
int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
@@ -37,6 +36,7 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_bat_packet(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if);
struct neigh_node *find_router(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const struct hard_iface *recv_if);
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index be0d581..6b14075 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -120,7 +120,7 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
/* adjust all flags and log packets */
while (aggregated_packet(buff_pos,
forw_packet->packet_len,
- batman_packet->num_tt)) {
+ batman_packet->tt_num_changes)) {
/* we might have aggregated direct link packets with an
* ordinary base packet */
@@ -135,17 +135,17 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
"Forwarding"));
bat_dbg(DBG_BATMAN, bat_priv,
"%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d,"
- " IDF %s) on interface %s [%pM]\n",
+ " IDF %s, hvn %d) on interface %s [%pM]\n",
fwd_str, (packet_num > 0 ? "aggregated " : ""),
batman_packet->orig, ntohl(batman_packet->seqno),
batman_packet->tq, batman_packet->ttl,
(batman_packet->flags & DIRECTLINK ?
"on" : "off"),
- hard_iface->net_dev->name,
+ batman_packet->ttvn, hard_iface->net_dev->name,
hard_iface->net_dev->dev_addr);
buff_pos += sizeof(*batman_packet) +
- (batman_packet->num_tt * ETH_ALEN);
+ tt_len(batman_packet->tt_num_changes);
packet_num++;
batman_packet = (struct batman_packet *)
(forw_packet->skb->data + buff_pos);
@@ -213,25 +213,18 @@ static void send_packet(struct forw_packet *forw_packet)
rcu_read_unlock();
}
-static void rebuild_batman_packet(struct bat_priv *bat_priv,
- struct hard_iface *hard_iface)
+static void realloc_packet_buffer(struct hard_iface *hard_iface,
+ int new_len)
{
- int new_len;
unsigned char *new_buff;
struct batman_packet *batman_packet;
- new_len = sizeof(*batman_packet) + (bat_priv->num_local_tt * ETH_ALEN);
new_buff = kmalloc(new_len, GFP_ATOMIC);
/* keep old buffer if kmalloc should fail */
if (new_buff) {
memcpy(new_buff, hard_iface->packet_buff,
sizeof(*batman_packet));
- batman_packet = (struct batman_packet *)new_buff;
-
- batman_packet->num_tt = tt_local_fill_buffer(bat_priv,
- new_buff + sizeof(*batman_packet),
- new_len - sizeof(*batman_packet));
kfree(hard_iface->packet_buff);
hard_iface->packet_buff = new_buff;
@@ -239,6 +232,46 @@ static void rebuild_batman_packet(struct bat_priv *bat_priv,
}
}
+/* when calling this function (hard_iface == primary_if) has to be true */
+static void prepare_packet_buffer(struct bat_priv *bat_priv,
+ struct hard_iface *hard_iface)
+{
+ int new_len;
+ struct batman_packet *batman_packet;
+
+ new_len = BAT_PACKET_LEN +
+ tt_len((uint8_t)atomic_read(&bat_priv->tt_local_changes));
+
+ /* if we have too many changes for one packet don't send any
+ * and wait for the tt table request which will be fragmented */
+ if (new_len > hard_iface->soft_iface->mtu)
+ new_len = BAT_PACKET_LEN;
+
+ realloc_packet_buffer(hard_iface, new_len);
+ batman_packet = (struct batman_packet *)hard_iface->packet_buff;
+
+ atomic_set(&bat_priv->tt_crc, tt_local_crc(bat_priv));
+
+ /* reset the sending counter */
+ atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX);
+
+ batman_packet->tt_num_changes = tt_changes_fill_buffer(bat_priv,
+ hard_iface->packet_buff + BAT_PACKET_LEN,
+ hard_iface->packet_len - BAT_PACKET_LEN);
+
+}
+
+static void reset_packet_buffer(struct bat_priv *bat_priv,
+ struct hard_iface *hard_iface)
+{
+ struct batman_packet *batman_packet;
+
+ realloc_packet_buffer(hard_iface, BAT_PACKET_LEN);
+
+ batman_packet = (struct batman_packet *)hard_iface->packet_buff;
+ batman_packet->tt_num_changes = 0;
+}
+
void schedule_own_packet(struct hard_iface *hard_iface)
{
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
@@ -264,14 +297,22 @@ void schedule_own_packet(struct hard_iface *hard_iface)
if (hard_iface->if_status == IF_TO_BE_ACTIVATED)
hard_iface->if_status = IF_ACTIVE;
- /* if local tt has changed and interface is a primary interface */
- if ((atomic_read(&bat_priv->tt_local_changed)) &&
- (hard_iface == primary_if))
- rebuild_batman_packet(bat_priv, hard_iface);
+ if (hard_iface == primary_if) {
+ /* if at least one change happened */
+ if (atomic_read(&bat_priv->tt_local_changes) > 0) {
+ prepare_packet_buffer(bat_priv, hard_iface);
+ /* Increment the TTVN only once per OGM interval */
+ atomic_inc(&bat_priv->ttvn);
+ }
+
+ /* if the changes have been sent enough times */
+ if (!atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt))
+ reset_packet_buffer(bat_priv, hard_iface);
+ }
/**
* NOTE: packet_buff might just have been re-allocated in
- * rebuild_batman_packet()
+ * prepare_packet_buffer() or in reset_packet_buffer()
*/
batman_packet = (struct batman_packet *)hard_iface->packet_buff;
@@ -279,6 +320,9 @@ void schedule_own_packet(struct hard_iface *hard_iface)
batman_packet->seqno =
htonl((uint32_t)atomic_read(&hard_iface->seqno));
+ batman_packet->ttvn = atomic_read(&bat_priv->ttvn);
+ batman_packet->tt_crc = htons((uint16_t)atomic_read(&bat_priv->tt_crc));
+
if (vis_server == VIS_TYPE_SERVER_SYNC)
batman_packet->flags |= VIS_SERVER;
else
@@ -307,13 +351,14 @@ void schedule_own_packet(struct hard_iface *hard_iface)
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
- int directlink, int tt_buff_len,
+ int directlink,
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *router;
uint8_t in_tq, in_ttl, tq_avg = 0;
unsigned long send_time;
+ uint8_t tt_num_changes;
if (batman_packet->ttl <= 1) {
bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n");
@@ -324,6 +369,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
in_tq = batman_packet->tq;
in_ttl = batman_packet->ttl;
+ tt_num_changes = batman_packet->tt_num_changes;
batman_packet->ttl--;
memcpy(batman_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
@@ -356,6 +402,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
batman_packet->ttl);
batman_packet->seqno = htonl(batman_packet->seqno);
+ batman_packet->tt_crc = htons(batman_packet->tt_crc);
/* switch of primaries first hop flag when forwarding */
batman_packet->flags &= ~PRIMARIES_FIRST_HOP;
@@ -367,7 +414,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
send_time = forward_send_time();
add_bat_packet_to_list(bat_priv,
(unsigned char *)batman_packet,
- sizeof(*batman_packet) + tt_buff_len,
+ sizeof(*batman_packet) + tt_len(tt_num_changes),
if_incoming, 0, send_time);
}
diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h
index 6d9c14d..633224a 100644
--- a/net/batman-adv/send.h
+++ b/net/batman-adv/send.h
@@ -28,7 +28,7 @@ void schedule_own_packet(struct hard_iface *hard_iface);
void schedule_forward_packet(struct orig_node *orig_node,
const struct ethhdr *ethhdr,
struct batman_packet *batman_packet,
- int directlink, int tt_buff_len,
+ int directlink,
struct hard_iface *if_outgoing);
int add_bcast_packet_to_list(struct bat_priv *bat_priv,
const struct sk_buff *skb);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 69c0022..c288d93 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -534,7 +534,7 @@ static int interface_set_mac_addr(struct net_device *dev, void *p)
/* only modify transtable if it has been initialised before */
if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
tt_local_remove(bat_priv, dev->dev_addr,
- "mac address changed");
+ "mac address changed");
tt_local_add(dev, addr->sa_data);
}
@@ -592,7 +592,7 @@ static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
if (curr_softif_neigh)
goto dropped;
- /* TODO: check this for locks */
+ /* Register the client MAC in the transtable */
tt_local_add(soft_iface, ethhdr->h_source);
if (is_multicast_ether_addr(ethhdr->h_dest)) {
@@ -830,7 +830,12 @@ struct net_device *softif_create(const char *name)
atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
atomic_set(&bat_priv->bcast_seqno, 1);
- atomic_set(&bat_priv->tt_local_changed, 0);
+ atomic_set(&bat_priv->ttvn, 0);
+ atomic_set(&bat_priv->tt_local_changes, 0);
+ atomic_set(&bat_priv->tt_ogm_append_cnt, 0);
+
+ bat_priv->tt_buff = NULL;
+ bat_priv->tt_buff_len = 0;
bat_priv->primary_if = NULL;
bat_priv->num_ifaces = 0;
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 561f769..597cd1a 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -23,13 +23,17 @@
#include "translation-table.h"
#include "soft-interface.h"
#include "hard-interface.h"
+#include "send.h"
#include "hash.h"
#include "originator.h"
+#include "routing.h"
-static void tt_local_purge(struct work_struct *work);
-static void _tt_global_del_orig(struct bat_priv *bat_priv,
- struct tt_global_entry *tt_global_entry,
- const char *message);
+#include <linux/crc16.h>
+
+static void _tt_global_del(struct bat_priv *bat_priv,
+ struct tt_global_entry *tt_global_entry,
+ const char *message);
+static void tt_purge(struct work_struct *work);
/* returns 1 if they are the same mac addr */
static int compare_ltt(const struct hlist_node *node, const void *data2)
@@ -49,10 +53,11 @@ static int compare_gtt(const struct hlist_node *node, const void *data2)
return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
}
-static void tt_local_start_timer(struct bat_priv *bat_priv)
+static void tt_start_timer(struct bat_priv *bat_priv)
{
- INIT_DELAYED_WORK(&bat_priv->tt_work, tt_local_purge);
- queue_delayed_work(bat_event_workqueue, &bat_priv->tt_work, 10 * HZ);
+ INIT_DELAYED_WORK(&bat_priv->tt_work, tt_purge);
+ queue_delayed_work(bat_event_workqueue, &bat_priv->tt_work,
+ msecs_to_jiffies(5000));
}
static struct tt_local_entry *tt_local_hash_find(struct bat_priv *bat_priv,
@@ -112,7 +117,42 @@ static struct tt_global_entry *tt_global_hash_find(struct bat_priv *bat_priv,
return tt_global_entry_tmp;
}
-int tt_local_init(struct bat_priv *bat_priv)
+static bool is_out_of_time(unsigned long starting_time, unsigned long timeout)
+{
+ unsigned long deadline;
+ deadline = starting_time + msecs_to_jiffies(timeout);
+
+ return time_after(jiffies, deadline);
+}
+
+static void tt_local_event(struct bat_priv *bat_priv, uint8_t op,
+ const uint8_t *addr)
+{
+ struct tt_change_node *tt_change_node;
+
+ tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC);
+
+ if (!tt_change_node)
+ return;
+
+ tt_change_node->change.flags = op;
+ memcpy(tt_change_node->change.addr, addr, ETH_ALEN);
+
+ spin_lock_bh(&bat_priv->tt_changes_list_lock);
+ /* track the change in the OGMinterval list */
+ list_add_tail(&tt_change_node->list, &bat_priv->tt_changes_list);
+ atomic_inc(&bat_priv->tt_local_changes);
+ spin_unlock_bh(&bat_priv->tt_changes_list_lock);
+
+ atomic_set(&bat_priv->tt_ogm_append_cnt, 0);
+}
+
+int tt_len(int changes_num)
+{
+ return changes_num * sizeof(struct tt_change);
+}
+
+static int tt_local_init(struct bat_priv *bat_priv)
{
if (bat_priv->tt_local_hash)
return 1;
@@ -122,9 +162,6 @@ int tt_local_init(struct bat_priv *bat_priv)
if (!bat_priv->tt_local_hash)
return 0;
- atomic_set(&bat_priv->tt_local_changed, 0);
- tt_local_start_timer(bat_priv);
-
return 1;
}
@@ -133,40 +170,24 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
struct bat_priv *bat_priv = netdev_priv(soft_iface);
struct tt_local_entry *tt_local_entry;
struct tt_global_entry *tt_global_entry;
- int required_bytes;
spin_lock_bh(&bat_priv->tt_lhash_lock);
tt_local_entry = tt_local_hash_find(bat_priv, addr);
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
if (tt_local_entry) {
tt_local_entry->last_seen = jiffies;
- return;
+ goto unlock;
}
- /* only announce as many hosts as possible in the batman-packet and
- space in batman_packet->num_tt That also should give a limit to
- MAC-flooding. */
- required_bytes = (bat_priv->num_local_tt + 1) * ETH_ALEN;
- required_bytes += BAT_PACKET_LEN;
-
- if ((required_bytes > ETH_DATA_LEN) ||
- (atomic_read(&bat_priv->aggregated_ogms) &&
- required_bytes > MAX_AGGREGATION_BYTES) ||
- (bat_priv->num_local_tt + 1 > 255)) {
- bat_dbg(DBG_ROUTES, bat_priv,
- "Can't add new local tt entry (%pM): "
- "number of local tt entries exceeds packet size\n",
- addr);
- return;
- }
-
- bat_dbg(DBG_ROUTES, bat_priv,
- "Creating new local tt entry: %pM\n", addr);
-
tt_local_entry = kmalloc(sizeof(*tt_local_entry), GFP_ATOMIC);
if (!tt_local_entry)
- return;
+ goto unlock;
+
+ tt_local_event(bat_priv, NO_FLAGS, addr);
+
+ bat_dbg(DBG_TT, bat_priv,
+ "Creating new local tt entry: %pM (ttvn: %d)\n", addr,
+ (uint8_t)atomic_read(&bat_priv->ttvn));
memcpy(tt_local_entry->addr, addr, ETH_ALEN);
tt_local_entry->last_seen = jiffies;
@@ -177,13 +198,9 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
else
tt_local_entry->never_purge = 0;
- spin_lock_bh(&bat_priv->tt_lhash_lock);
-
hash_add(bat_priv->tt_local_hash, compare_ltt, choose_orig,
tt_local_entry, &tt_local_entry->hash_entry);
- bat_priv->num_local_tt++;
- atomic_set(&bat_priv->tt_local_changed, 1);
-
+ atomic_inc(&bat_priv->num_local_tt);
spin_unlock_bh(&bat_priv->tt_lhash_lock);
/* remove address from global hash if present */
@@ -192,46 +209,60 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
tt_global_entry = tt_global_hash_find(bat_priv, addr);
if (tt_global_entry)
- _tt_global_del_orig(bat_priv, tt_global_entry,
- "local tt received");
+ _tt_global_del(bat_priv, tt_global_entry,
+ "local tt received");
spin_unlock_bh(&bat_priv->tt_ghash_lock);
+ return;
+unlock:
+ spin_unlock_bh(&bat_priv->tt_lhash_lock);
}
-int tt_local_fill_buffer(struct bat_priv *bat_priv,
- unsigned char *buff, int buff_len)
+int tt_changes_fill_buffer(struct bat_priv *bat_priv,
+ unsigned char *buff, int buff_len)
{
- struct hashtable_t *hash = bat_priv->tt_local_hash;
- struct tt_local_entry *tt_local_entry;
- struct hlist_node *node;
- struct hlist_head *head;
- int i, count = 0;
+ int count = 0, tot_changes = 0;
+ struct tt_change_node *entry, *safe;
- spin_lock_bh(&bat_priv->tt_lhash_lock);
+ if (buff_len > 0)
+ tot_changes = buff_len / tt_len(1);
- for (i = 0; i < hash->size; i++) {
- head = &hash->table[i];
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(tt_local_entry, node,
- head, hash_entry) {
- if (buff_len < (count + 1) * ETH_ALEN)
- break;
-
- memcpy(buff + (count * ETH_ALEN), tt_local_entry->addr,
- ETH_ALEN);
+ spin_lock_bh(&bat_priv->tt_changes_list_lock);
+ atomic_set(&bat_priv->tt_local_changes, 0);
+ list_for_each_entry_safe(entry, safe, &bat_priv->tt_changes_list,
+ list) {
+ if (count < tot_changes) {
+ memcpy(buff + tt_len(count),
+ &entry->change, sizeof(struct tt_change));
count++;
}
- rcu_read_unlock();
+ list_del(&entry->list);
+ kfree(entry);
}
+ spin_unlock_bh(&bat_priv->tt_changes_list_lock);
- /* if we did not get all new local tts see you next time ;-) */
- if (count == bat_priv->num_local_tt)
- atomic_set(&bat_priv->tt_local_changed, 0);
+ /* Keep the buffer for possible tt_request */
+ spin_lock_bh(&bat_priv->tt_buff_lock);
+ kfree(bat_priv->tt_buff);
+ bat_priv->tt_buff_len = 0;
+ bat_priv->tt_buff = NULL;
+ /* We check whether this new OGM has no changes due to size
+ * problems */
+ if (buff_len > 0) {
+ /**
+ * if kmalloc() fails we will reply with the full table
+ * instead of providing the diff
+ */
+ bat_priv->tt_buff = kmalloc(buff_len, GFP_ATOMIC);
+ if (bat_priv->tt_buff) {
+ memcpy(bat_priv->tt_buff, buff, buff_len);
+ bat_priv->tt_buff_len = buff_len;
+ }
+ }
+ spin_unlock_bh(&bat_priv->tt_buff_lock);
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
- return count;
+ return tot_changes;
}
int tt_local_seq_print_text(struct seq_file *seq, void *offset)
@@ -263,8 +294,8 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
}
seq_printf(seq, "Locally retrieved addresses (from %s) "
- "announced via TT:\n",
- net_dev->name);
+ "announced via TT (TTVN: %u):\n",
+ net_dev->name, (uint8_t)atomic_read(&bat_priv->ttvn));
spin_lock_bh(&bat_priv->tt_lhash_lock);
@@ -311,54 +342,51 @@ out:
return ret;
}
-static void _tt_local_del(struct hlist_node *node, void *arg)
+static void tt_local_entry_free(struct hlist_node *node, void *arg)
{
struct bat_priv *bat_priv = arg;
void *data = container_of(node, struct tt_local_entry, hash_entry);
kfree(data);
- bat_priv->num_local_tt--;
- atomic_set(&bat_priv->tt_local_changed, 1);
+ atomic_dec(&bat_priv->num_local_tt);
}
static void tt_local_del(struct bat_priv *bat_priv,
struct tt_local_entry *tt_local_entry,
const char *message)
{
- bat_dbg(DBG_ROUTES, bat_priv, "Deleting local tt entry (%pM): %s\n",
+ bat_dbg(DBG_TT, bat_priv, "Deleting local tt entry (%pM): %s\n",
tt_local_entry->addr, message);
+ atomic_dec(&bat_priv->num_local_tt);
+
hash_remove(bat_priv->tt_local_hash, compare_ltt, choose_orig,
tt_local_entry->addr);
- _tt_local_del(&tt_local_entry->hash_entry, bat_priv);
+
+ tt_local_entry_free(&tt_local_entry->hash_entry, bat_priv);
}
-void tt_local_remove(struct bat_priv *bat_priv,
- const uint8_t *addr, const char *message)
+void tt_local_remove(struct bat_priv *bat_priv, const uint8_t *addr,
+ const char *message)
{
struct tt_local_entry *tt_local_entry;
spin_lock_bh(&bat_priv->tt_lhash_lock);
-
tt_local_entry = tt_local_hash_find(bat_priv, addr);
- if (tt_local_entry)
+ if (tt_local_entry) {
+ tt_local_event(bat_priv, TT_CHANGE_DEL, tt_local_entry->addr);
tt_local_del(bat_priv, tt_local_entry, message);
-
+ }
spin_unlock_bh(&bat_priv->tt_lhash_lock);
}
-static void tt_local_purge(struct work_struct *work)
+static void tt_local_purge(struct bat_priv *bat_priv)
{
- struct delayed_work *delayed_work =
- container_of(work, struct delayed_work, work);
- struct bat_priv *bat_priv =
- container_of(delayed_work, struct bat_priv, tt_work);
struct hashtable_t *hash = bat_priv->tt_local_hash;
struct tt_local_entry *tt_local_entry;
struct hlist_node *node, *node_tmp;
struct hlist_head *head;
- unsigned long timeout;
int i;
spin_lock_bh(&bat_priv->tt_lhash_lock);
@@ -371,32 +399,53 @@ static void tt_local_purge(struct work_struct *work)
if (tt_local_entry->never_purge)
continue;
- timeout = tt_local_entry->last_seen;
- timeout += TT_LOCAL_TIMEOUT * HZ;
-
- if (time_before(jiffies, timeout))
+ if (!is_out_of_time(tt_local_entry->last_seen,
+ TT_LOCAL_TIMEOUT * 1000))
continue;
+ tt_local_event(bat_priv, TT_CHANGE_DEL,
+ tt_local_entry->addr);
tt_local_del(bat_priv, tt_local_entry,
- "address timed out");
+ "address timed out");
}
}
spin_unlock_bh(&bat_priv->tt_lhash_lock);
- tt_local_start_timer(bat_priv);
}
-void tt_local_free(struct bat_priv *bat_priv)
+static void tt_local_table_free(struct bat_priv *bat_priv)
{
+ struct hashtable_t *hash;
+ int i;
+ spinlock_t *list_lock; /* protects write access to the hash lists */
+ struct hlist_head *head;
+ struct hlist_node *node, *node_tmp;
+ struct tt_local_entry *tt_local_entry;
+
if (!bat_priv->tt_local_hash)
return;
- cancel_delayed_work_sync(&bat_priv->tt_work);
- hash_delete(bat_priv->tt_local_hash, _tt_local_del, bat_priv);
+ hash = bat_priv->tt_local_hash;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+ list_lock = &hash->list_locks[i];
+
+ spin_lock_bh(list_lock);
+ hlist_for_each_entry_safe(tt_local_entry, node, node_tmp,
+ head, hash_entry) {
+ hlist_del_rcu(node);
+ kfree(tt_local_entry);
+ }
+ spin_unlock_bh(list_lock);
+ }
+
+ hash_destroy(hash);
+
bat_priv->tt_local_hash = NULL;
}
-int tt_global_init(struct bat_priv *bat_priv)
+static int tt_global_init(struct bat_priv *bat_priv)
{
if (bat_priv->tt_global_hash)
return 1;
@@ -409,73 +458,78 @@ int tt_global_init(struct bat_priv *bat_priv)
return 1;
}
-void tt_global_add_orig(struct bat_priv *bat_priv,
- struct orig_node *orig_node,
- const unsigned char *tt_buff, int tt_buff_len)
+static void tt_changes_list_free(struct bat_priv *bat_priv)
+{
+ struct tt_change_node *entry, *safe;
+
+ spin_lock_bh(&bat_priv->tt_changes_list_lock);
+
+ list_for_each_entry_safe(entry, safe, &bat_priv->tt_changes_list,
+ list) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
+
+ atomic_set(&bat_priv->tt_local_changes, 0);
+ spin_unlock_bh(&bat_priv->tt_changes_list_lock);
+}
+
+/* caller must hold orig_node refcount */
+int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ const unsigned char *tt_addr, uint8_t ttvn)
{
struct tt_global_entry *tt_global_entry;
struct tt_local_entry *tt_local_entry;
- int tt_buff_count = 0;
- const unsigned char *tt_ptr;
-
- while ((tt_buff_count + 1) * ETH_ALEN <= tt_buff_len) {
- spin_lock_bh(&bat_priv->tt_ghash_lock);
-
- tt_ptr = tt_buff + (tt_buff_count * ETH_ALEN);
- tt_global_entry = tt_global_hash_find(bat_priv, tt_ptr);
-
- if (!tt_global_entry) {
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
-
- tt_global_entry = kmalloc(sizeof(*tt_global_entry),
- GFP_ATOMIC);
-
- if (!tt_global_entry)
- break;
-
- memcpy(tt_global_entry->addr, tt_ptr, ETH_ALEN);
-
- bat_dbg(DBG_ROUTES, bat_priv,
- "Creating new global tt entry: "
- "%pM (via %pM)\n",
- tt_global_entry->addr, orig_node->orig);
-
- spin_lock_bh(&bat_priv->tt_ghash_lock);
- hash_add(bat_priv->tt_global_hash, compare_gtt,
- choose_orig, tt_global_entry,
- &tt_global_entry->hash_entry);
-
- }
-
+ struct orig_node *orig_node_tmp;
+
+ spin_lock_bh(&bat_priv->tt_ghash_lock);
+ tt_global_entry = tt_global_hash_find(bat_priv, tt_addr);
+
+ if (!tt_global_entry) {
+ tt_global_entry =
+ kmalloc(sizeof(*tt_global_entry),
+ GFP_ATOMIC);
+ if (!tt_global_entry)
+ goto unlock;
+ memcpy(tt_global_entry->addr, tt_addr, ETH_ALEN);
+ /* Assign the new orig_node */
+ atomic_inc(&orig_node->refcount);
tt_global_entry->orig_node = orig_node;
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
-
- /* remove address from local hash if present */
- spin_lock_bh(&bat_priv->tt_lhash_lock);
-
- tt_ptr = tt_buff + (tt_buff_count * ETH_ALEN);
- tt_local_entry = tt_local_hash_find(bat_priv, tt_ptr);
-
- if (tt_local_entry)
- tt_local_del(bat_priv, tt_local_entry,
- "global tt received");
-
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
-
- tt_buff_count++;
- }
-
- /* initialize, and overwrite if malloc succeeds */
- orig_node->tt_buff = NULL;
- orig_node->tt_buff_len = 0;
-
- if (tt_buff_len > 0) {
- orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC);
- if (orig_node->tt_buff) {
- memcpy(orig_node->tt_buff, tt_buff, tt_buff_len);
- orig_node->tt_buff_len = tt_buff_len;
+ tt_global_entry->ttvn = ttvn;
+ atomic_inc(&orig_node->tt_size);
+ hash_add(bat_priv->tt_global_hash, compare_gtt,
+ choose_orig, tt_global_entry,
+ &tt_global_entry->hash_entry);
+ } else {
+ if (tt_global_entry->orig_node != orig_node) {
+ atomic_dec(&tt_global_entry->orig_node->tt_size);
+ orig_node_tmp = tt_global_entry->orig_node;
+ atomic_inc(&orig_node->refcount);
+ tt_global_entry->orig_node = orig_node;
+ tt_global_entry->ttvn = ttvn;
+ orig_node_free_ref(orig_node_tmp);
+ atomic_inc(&orig_node->tt_size);
}
}
+
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
+
+ bat_dbg(DBG_TT, bat_priv,
+ "Creating new global tt entry: %pM (via %pM)\n",
+ tt_global_entry->addr, orig_node->orig);
+
+ /* remove address from local hash if present */
+ spin_lock_bh(&bat_priv->tt_lhash_lock);
+ tt_local_entry = tt_local_hash_find(bat_priv, tt_addr);
+
+ if (tt_local_entry)
+ tt_local_del(bat_priv, tt_local_entry,
+ "global tt received");
+ spin_unlock_bh(&bat_priv->tt_lhash_lock);
+ return 1;
+unlock:
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
+ return 0;
}
int tt_global_seq_print_text(struct seq_file *seq, void *offset)
@@ -509,17 +563,20 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
seq_printf(seq,
"Globally announced TT entries received via the mesh %s\n",
net_dev->name);
+ seq_printf(seq, " %-13s %s %-15s %s\n",
+ "Client", "(TTVN)", "Originator", "(Curr TTVN)");
spin_lock_bh(&bat_priv->tt_ghash_lock);
buf_size = 1;
- /* Estimate length for: " * xx:xx:xx:xx:xx:xx via xx:xx:xx:xx:xx:xx\n"*/
+ /* Estimate length for: " * xx:xx:xx:xx:xx:xx (ttvn) via
+ * xx:xx:xx:xx:xx:xx (cur_ttvn)\n"*/
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
rcu_read_lock();
__hlist_for_each_rcu(node, head)
- buf_size += 43;
+ buf_size += 59;
rcu_read_unlock();
}
@@ -538,10 +595,14 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
rcu_read_lock();
hlist_for_each_entry_rcu(tt_global_entry, node,
head, hash_entry) {
- pos += snprintf(buff + pos, 44,
- " * %pM via %pM\n",
+ pos += snprintf(buff + pos, 61,
+ " * %pM (%3u) via %pM (%3u)\n",
tt_global_entry->addr,
- tt_global_entry->orig_node->orig);
+ tt_global_entry->ttvn,
+ tt_global_entry->orig_node->orig,
+ (uint8_t) atomic_read(
+ &tt_global_entry->orig_node->
+ last_ttvn));
}
rcu_read_unlock();
}
@@ -556,64 +617,80 @@ out:
return ret;
}
-static void _tt_global_del_orig(struct bat_priv *bat_priv,
- struct tt_global_entry *tt_global_entry,
- const char *message)
+static void _tt_global_del(struct bat_priv *bat_priv,
+ struct tt_global_entry *tt_global_entry,
+ const char *message)
{
- bat_dbg(DBG_ROUTES, bat_priv,
+ if (!tt_global_entry)
+ return;
+
+ bat_dbg(DBG_TT, bat_priv,
"Deleting global tt entry %pM (via %pM): %s\n",
tt_global_entry->addr, tt_global_entry->orig_node->orig,
message);
+ atomic_dec(&tt_global_entry->orig_node->tt_size);
hash_remove(bat_priv->tt_global_hash, compare_gtt, choose_orig,
tt_global_entry->addr);
kfree(tt_global_entry);
}
+void tt_global_del(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, const unsigned char *addr,
+ const char *message)
+{
+ struct tt_global_entry *tt_global_entry;
+
+ spin_lock_bh(&bat_priv->tt_ghash_lock);
+ tt_global_entry = tt_global_hash_find(bat_priv, addr);
+
+ if (tt_global_entry && tt_global_entry->orig_node == orig_node) {
+ atomic_dec(&orig_node->tt_size);
+ _tt_global_del(bat_priv, tt_global_entry, message);
+ }
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
+}
+
void tt_global_del_orig(struct bat_priv *bat_priv,
- struct orig_node *orig_node, const char *message)
+ struct orig_node *orig_node, const char *message)
{
struct tt_global_entry *tt_global_entry;
- int tt_buff_count = 0;
- unsigned char *tt_ptr;
+ int i;
+ struct hashtable_t *hash = bat_priv->tt_global_hash;
+ struct hlist_node *node, *safe;
+ struct hlist_head *head;
- if (orig_node->tt_buff_len == 0)
+ if (!bat_priv->tt_global_hash)
return;
spin_lock_bh(&bat_priv->tt_ghash_lock);
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
- while ((tt_buff_count + 1) * ETH_ALEN <= orig_node->tt_buff_len) {
- tt_ptr = orig_node->tt_buff + (tt_buff_count * ETH_ALEN);
- tt_global_entry = tt_global_hash_find(bat_priv, tt_ptr);
-
- if ((tt_global_entry) &&
- (tt_global_entry->orig_node == orig_node))
- _tt_global_del_orig(bat_priv, tt_global_entry,
- message);
-
- tt_buff_count++;
+ hlist_for_each_entry_safe(tt_global_entry, node, safe,
+ head, hash_entry) {
+ if (tt_global_entry->orig_node == orig_node)
+ _tt_global_del(bat_priv, tt_global_entry,
+ message);
+ }
}
+ atomic_set(&orig_node->tt_size, 0);
spin_unlock_bh(&bat_priv->tt_ghash_lock);
-
- orig_node->tt_buff_len = 0;
- kfree(orig_node->tt_buff);
- orig_node->tt_buff = NULL;
}
-static void tt_global_del(struct hlist_node *node, void *arg)
+static void tt_global_entry_free(struct hlist_node *node, void *arg)
{
void *data = container_of(node, struct tt_global_entry, hash_entry);
-
kfree(data);
}
-void tt_global_free(struct bat_priv *bat_priv)
+static void tt_global_table_free(struct bat_priv *bat_priv)
{
if (!bat_priv->tt_global_hash)
return;
- hash_delete(bat_priv->tt_global_hash, tt_global_del, NULL);
+ hash_delete(bat_priv->tt_global_hash, tt_global_entry_free, NULL);
bat_priv->tt_global_hash = NULL;
}
@@ -638,3 +715,686 @@ out:
spin_unlock_bh(&bat_priv->tt_ghash_lock);
return orig_node;
}
+
+/* Calculates the checksum of the local table of a given orig_node */
+uint16_t tt_global_crc(struct bat_priv *bat_priv, struct orig_node *orig_node)
+{
+ uint16_t total = 0, total_one;
+ struct hashtable_t *hash = bat_priv->tt_global_hash;
+ struct tt_global_entry *tt_global_entry;
+ struct hlist_node *node;
+ struct hlist_head *head;
+ int i, j;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(tt_global_entry, node,
+ head, hash_entry) {
+ if (compare_eth(tt_global_entry->orig_node,
+ orig_node)) {
+ total_one = 0;
+ for (j = 0; j < ETH_ALEN; j++)
+ total_one = crc16_byte(total_one,
+ tt_global_entry->addr[j]);
+ total ^= total_one;
+ }
+ }
+ rcu_read_unlock();
+ }
+
+ return total;
+}
+
+/* Calculates the checksum of the local table */
+uint16_t tt_local_crc(struct bat_priv *bat_priv)
+{
+ uint16_t total = 0, total_one;
+ struct hashtable_t *hash = bat_priv->tt_local_hash;
+ struct tt_local_entry *tt_local_entry;
+ struct hlist_node *node;
+ struct hlist_head *head;
+ int i, j;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(tt_local_entry, node,
+ head, hash_entry) {
+ total_one = 0;
+ for (j = 0; j < ETH_ALEN; j++)
+ total_one = crc16_byte(total_one,
+ tt_local_entry->addr[j]);
+ total ^= total_one;
+ }
+
+ rcu_read_unlock();
+ }
+
+ return total;
+}
+
+static void tt_req_list_free(struct bat_priv *bat_priv)
+{
+ struct tt_req_node *node, *safe;
+
+ spin_lock_bh(&bat_priv->tt_req_list_lock);
+
+ list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) {
+ list_del(&node->list);
+ kfree(node);
+ }
+
+ spin_unlock_bh(&bat_priv->tt_req_list_lock);
+}
+
+void tt_save_orig_buffer(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ const unsigned char *tt_buff, uint8_t tt_num_changes)
+{
+ uint16_t tt_buff_len = tt_len(tt_num_changes);
+
+ /* Replace the old buffer only if I received something in the
+ * last OGM (the OGM could carry no changes) */
+ spin_lock_bh(&orig_node->tt_buff_lock);
+ if (tt_buff_len > 0) {
+ kfree(orig_node->tt_buff);
+ orig_node->tt_buff_len = 0;
+ orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC);
+ if (orig_node->tt_buff) {
+ memcpy(orig_node->tt_buff, tt_buff, tt_buff_len);
+ orig_node->tt_buff_len = tt_buff_len;
+ }
+ }
+ spin_unlock_bh(&orig_node->tt_buff_lock);
+}
+
+static void tt_req_purge(struct bat_priv *bat_priv)
+{
+ struct tt_req_node *node, *safe;
+
+ spin_lock_bh(&bat_priv->tt_req_list_lock);
+ list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) {
+ if (is_out_of_time(node->issued_at,
+ TT_REQUEST_TIMEOUT * 1000)) {
+ list_del(&node->list);
+ kfree(node);
+ }
+ }
+ spin_unlock_bh(&bat_priv->tt_req_list_lock);
+}
+
+/* returns the pointer to the new tt_req_node struct if no request
+ * has already been issued for this orig_node, NULL otherwise */
+static struct tt_req_node *new_tt_req_node(struct bat_priv *bat_priv,
+ struct orig_node *orig_node)
+{
+ struct tt_req_node *tt_req_node_tmp, *tt_req_node = NULL;
+
+ spin_lock_bh(&bat_priv->tt_req_list_lock);
+ list_for_each_entry(tt_req_node_tmp, &bat_priv->tt_req_list, list) {
+ if (compare_eth(tt_req_node_tmp, orig_node) &&
+ !is_out_of_time(tt_req_node_tmp->issued_at,
+ TT_REQUEST_TIMEOUT * 1000))
+ goto unlock;
+ }
+
+ tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC);
+ if (!tt_req_node)
+ goto unlock;
+
+ memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN);
+ tt_req_node->issued_at = jiffies;
+
+ list_add(&tt_req_node->list, &bat_priv->tt_req_list);
+unlock:
+ spin_unlock_bh(&bat_priv->tt_req_list_lock);
+ return tt_req_node;
+}
+
+static int tt_global_valid_entry(const void *entry_ptr, const void *data_ptr)
+{
+ const struct tt_global_entry *tt_global_entry = entry_ptr;
+ const struct orig_node *orig_node = data_ptr;
+
+ return (tt_global_entry->orig_node == orig_node);
+}
+
+static struct sk_buff *tt_response_fill_table(uint16_t tt_len, uint8_t ttvn,
+ struct hashtable_t *hash,
+ struct hard_iface *primary_if,
+ int (*valid_cb)(const void *,
+ const void *),
+ void *cb_data)
+{
+ struct tt_local_entry *tt_local_entry;
+ struct tt_query_packet *tt_response;
+ struct tt_change *tt_change;
+ struct hlist_node *node;
+ struct hlist_head *head;
+ struct sk_buff *skb = NULL;
+ uint16_t tt_tot, tt_count;
+ ssize_t tt_query_size = sizeof(struct tt_query_packet);
+ int i;
+
+ if (tt_query_size + tt_len > primary_if->soft_iface->mtu) {
+ tt_len = primary_if->soft_iface->mtu - tt_query_size;
+ tt_len -= tt_len % sizeof(struct tt_change);
+ }
+ tt_tot = tt_len / sizeof(struct tt_change);
+
+ skb = dev_alloc_skb(tt_query_size + tt_len + ETH_HLEN);
+ if (!skb)
+ goto out;
+
+ skb_reserve(skb, ETH_HLEN);
+ tt_response = (struct tt_query_packet *)skb_put(skb,
+ tt_query_size + tt_len);
+ tt_response->ttvn = ttvn;
+ tt_response->tt_data = htons(tt_tot);
+
+ tt_change = (struct tt_change *)(skb->data + tt_query_size);
+ tt_count = 0;
+
+ rcu_read_lock();
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry_rcu(tt_local_entry, node,
+ head, hash_entry) {
+ if (tt_count == tt_tot)
+ break;
+
+ if ((valid_cb) && (!valid_cb(tt_local_entry, cb_data)))
+ continue;
+
+ memcpy(tt_change->addr, tt_local_entry->addr, ETH_ALEN);
+ tt_change->flags = NO_FLAGS;
+
+ tt_count++;
+ tt_change++;
+ }
+ }
+ rcu_read_unlock();
+
+out:
+ return skb;
+}
+
+int send_tt_request(struct bat_priv *bat_priv, struct orig_node *dst_orig_node,
+ uint8_t ttvn, uint16_t tt_crc, bool full_table)
+{
+ struct sk_buff *skb = NULL;
+ struct tt_query_packet *tt_request;
+ struct neigh_node *neigh_node = NULL;
+ struct hard_iface *primary_if;
+ struct tt_req_node *tt_req_node = NULL;
+ int ret = 1;
+
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
+ /* The new tt_req will be issued only if I'm not waiting for a
+ * reply from the same orig_node yet */
+ tt_req_node = new_tt_req_node(bat_priv, dst_orig_node);
+ if (!tt_req_node)
+ goto out;
+
+ skb = dev_alloc_skb(sizeof(struct tt_query_packet) + ETH_HLEN);
+ if (!skb)
+ goto out;
+
+ skb_reserve(skb, ETH_HLEN);
+
+ tt_request = (struct tt_query_packet *)skb_put(skb,
+ sizeof(struct tt_query_packet));
+
+ tt_request->packet_type = BAT_TT_QUERY;
+ tt_request->version = COMPAT_VERSION;
+ memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN);
+ tt_request->ttl = TTL;
+ tt_request->ttvn = ttvn;
+ tt_request->tt_data = tt_crc;
+ tt_request->flags = TT_REQUEST;
+
+ if (full_table)
+ tt_request->flags |= TT_FULL_TABLE;
+
+ neigh_node = orig_node_get_router(dst_orig_node);
+ if (!neigh_node)
+ goto out;
+
+ bat_dbg(DBG_TT, bat_priv, "Sending TT_REQUEST to %pM via %pM "
+ "[%c]\n", dst_orig_node->orig, neigh_node->addr,
+ (full_table ? 'F' : '.'));
+
+ send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ ret = 0;
+
+out:
+ if (neigh_node)
+ neigh_node_free_ref(neigh_node);
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ if (ret)
+ kfree_skb(skb);
+ if (ret && tt_req_node) {
+ spin_lock_bh(&bat_priv->tt_req_list_lock);
+ list_del(&tt_req_node->list);
+ spin_unlock_bh(&bat_priv->tt_req_list_lock);
+ kfree(tt_req_node);
+ }
+ return ret;
+}
+
+static bool send_other_tt_response(struct bat_priv *bat_priv,
+ struct tt_query_packet *tt_request)
+{
+ struct orig_node *req_dst_orig_node = NULL, *res_dst_orig_node = NULL;
+ struct neigh_node *neigh_node = NULL;
+ struct hard_iface *primary_if = NULL;
+ uint8_t orig_ttvn, req_ttvn, ttvn;
+ int ret = false;
+ unsigned char *tt_buff;
+ bool full_table;
+ uint16_t tt_len, tt_tot;
+ struct sk_buff *skb = NULL;
+ struct tt_query_packet *tt_response;
+
+ bat_dbg(DBG_TT, bat_priv,
+ "Received TT_REQUEST from %pM for "
+ "ttvn: %u (%pM) [%c]\n", tt_request->src,
+ tt_request->ttvn, tt_request->dst,
+ (tt_request->flags & TT_FULL_TABLE ? 'F' : '.'));
+
+ /* Let's get the orig node of the REAL destination */
+ req_dst_orig_node = get_orig_node(bat_priv, tt_request->dst);
+ if (!req_dst_orig_node)
+ goto out;
+
+ res_dst_orig_node = get_orig_node(bat_priv, tt_request->src);
+ if (!res_dst_orig_node)
+ goto out;
+
+ neigh_node = orig_node_get_router(res_dst_orig_node);
+ if (!neigh_node)
+ goto out;
+
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
+ orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
+ req_ttvn = tt_request->ttvn;
+
+ /* I have not the requested data */
+ if (orig_ttvn != req_ttvn ||
+ tt_request->tt_data != req_dst_orig_node->tt_crc)
+ goto out;
+
+ /* If it has explicitly been requested the full table */
+ if (tt_request->flags & TT_FULL_TABLE ||
+ !req_dst_orig_node->tt_buff)
+ full_table = true;
+ else
+ full_table = false;
+
+ /* In this version, fragmentation is not implemented, then
+ * I'll send only one packet with as much TT entries as I can */
+ if (!full_table) {
+ spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
+ tt_len = req_dst_orig_node->tt_buff_len;
+ tt_tot = tt_len / sizeof(struct tt_change);
+
+ skb = dev_alloc_skb(sizeof(struct tt_query_packet) +
+ tt_len + ETH_HLEN);
+ if (!skb)
+ goto unlock;
+
+ skb_reserve(skb, ETH_HLEN);
+ tt_response = (struct tt_query_packet *)skb_put(skb,
+ sizeof(struct tt_query_packet) + tt_len);
+ tt_response->ttvn = req_ttvn;
+ tt_response->tt_data = htons(tt_tot);
+
+ tt_buff = skb->data + sizeof(struct tt_query_packet);
+ /* Copy the last orig_node's OGM buffer */
+ memcpy(tt_buff, req_dst_orig_node->tt_buff,
+ req_dst_orig_node->tt_buff_len);
+
+ spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
+ } else {
+ tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size) *
+ sizeof(struct tt_change);
+ ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
+
+ skb = tt_response_fill_table(tt_len, ttvn,
+ bat_priv->tt_global_hash,
+ primary_if, tt_global_valid_entry,
+ req_dst_orig_node);
+ if (!skb)
+ goto out;
+
+ tt_response = (struct tt_query_packet *)skb->data;
+ }
+
+ tt_response->packet_type = BAT_TT_QUERY;
+ tt_response->version = COMPAT_VERSION;
+ tt_response->ttl = TTL;
+ memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN);
+ memcpy(tt_response->dst, tt_request->src, ETH_ALEN);
+ tt_response->flags = TT_RESPONSE;
+
+ if (full_table)
+ tt_response->flags |= TT_FULL_TABLE;
+
+ bat_dbg(DBG_TT, bat_priv,
+ "Sending TT_RESPONSE %pM via %pM for %pM (ttvn: %u)\n",
+ res_dst_orig_node->orig, neigh_node->addr,
+ req_dst_orig_node->orig, req_ttvn);
+
+ send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ ret = true;
+ goto out;
+
+unlock:
+ spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
+
+out:
+ if (res_dst_orig_node)
+ orig_node_free_ref(res_dst_orig_node);
+ if (req_dst_orig_node)
+ orig_node_free_ref(req_dst_orig_node);
+ if (neigh_node)
+ neigh_node_free_ref(neigh_node);
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ if (!ret)
+ kfree_skb(skb);
+ return ret;
+
+}
+static bool send_my_tt_response(struct bat_priv *bat_priv,
+ struct tt_query_packet *tt_request)
+{
+ struct orig_node *orig_node = NULL;
+ struct neigh_node *neigh_node = NULL;
+ struct hard_iface *primary_if = NULL;
+ uint8_t my_ttvn, req_ttvn, ttvn;
+ int ret = false;
+ unsigned char *tt_buff;
+ bool full_table;
+ uint16_t tt_len, tt_tot;
+ struct sk_buff *skb = NULL;
+ struct tt_query_packet *tt_response;
+
+ bat_dbg(DBG_TT, bat_priv,
+ "Received TT_REQUEST from %pM for "
+ "ttvn: %u (me) [%c]\n", tt_request->src,
+ tt_request->ttvn,
+ (tt_request->flags & TT_FULL_TABLE ? 'F' : '.'));
+
+
+ my_ttvn = (uint8_t)atomic_read(&bat_priv->ttvn);
+ req_ttvn = tt_request->ttvn;
+
+ orig_node = get_orig_node(bat_priv, tt_request->src);
+ if (!orig_node)
+ goto out;
+
+ neigh_node = orig_node_get_router(orig_node);
+ if (!neigh_node)
+ goto out;
+
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
+ /* If the full table has been explicitly requested or the gap
+ * is too big send the whole local translation table */
+ if (tt_request->flags & TT_FULL_TABLE || my_ttvn != req_ttvn ||
+ !bat_priv->tt_buff)
+ full_table = true;
+ else
+ full_table = false;
+
+ /* In this version, fragmentation is not implemented, then
+ * I'll send only one packet with as much TT entries as I can */
+ if (!full_table) {
+ spin_lock_bh(&bat_priv->tt_buff_lock);
+ tt_len = bat_priv->tt_buff_len;
+ tt_tot = tt_len / sizeof(struct tt_change);
+
+ skb = dev_alloc_skb(sizeof(struct tt_query_packet) +
+ tt_len + ETH_HLEN);
+ if (!skb)
+ goto unlock;
+
+ skb_reserve(skb, ETH_HLEN);
+ tt_response = (struct tt_query_packet *)skb_put(skb,
+ sizeof(struct tt_query_packet) + tt_len);
+ tt_response->ttvn = req_ttvn;
+ tt_response->tt_data = htons(tt_tot);
+
+ tt_buff = skb->data + sizeof(struct tt_query_packet);
+ memcpy(tt_buff, bat_priv->tt_buff,
+ bat_priv->tt_buff_len);
+ spin_unlock_bh(&bat_priv->tt_buff_lock);
+ } else {
+ tt_len = (uint16_t)atomic_read(&bat_priv->num_local_tt) *
+ sizeof(struct tt_change);
+ ttvn = (uint8_t)atomic_read(&bat_priv->ttvn);
+
+ skb = tt_response_fill_table(tt_len, ttvn,
+ bat_priv->tt_local_hash,
+ primary_if, NULL, NULL);
+ if (!skb)
+ goto out;
+
+ tt_response = (struct tt_query_packet *)skb->data;
+ }
+
+ tt_response->packet_type = BAT_TT_QUERY;
+ tt_response->version = COMPAT_VERSION;
+ tt_response->ttl = TTL;
+ memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(tt_response->dst, tt_request->src, ETH_ALEN);
+ tt_response->flags = TT_RESPONSE;
+
+ if (full_table)
+ tt_response->flags |= TT_FULL_TABLE;
+
+ bat_dbg(DBG_TT, bat_priv,
+ "Sending TT_RESPONSE to %pM via %pM [%c]\n",
+ orig_node->orig, neigh_node->addr,
+ (tt_response->flags & TT_FULL_TABLE ? 'F' : '.'));
+
+ send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ ret = true;
+ goto out;
+
+unlock:
+ spin_unlock_bh(&bat_priv->tt_buff_lock);
+out:
+ if (orig_node)
+ orig_node_free_ref(orig_node);
+ if (neigh_node)
+ neigh_node_free_ref(neigh_node);
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ if (!ret)
+ kfree_skb(skb);
+ /* This packet was for me, so it doesn't need to be re-routed */
+ return true;
+}
+
+bool send_tt_response(struct bat_priv *bat_priv,
+ struct tt_query_packet *tt_request)
+{
+ if (is_my_mac(tt_request->dst))
+ return send_my_tt_response(bat_priv, tt_request);
+ else
+ return send_other_tt_response(bat_priv, tt_request);
+}
+
+static void _tt_update_changes(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ struct tt_change *tt_change,
+ uint16_t tt_num_changes, uint8_t ttvn)
+{
+ int i;
+
+ for (i = 0; i < tt_num_changes; i++) {
+ if ((tt_change + i)->flags & TT_CHANGE_DEL)
+ tt_global_del(bat_priv, orig_node,
+ (tt_change + i)->addr,
+ "tt removed by changes");
+ else
+ if (!tt_global_add(bat_priv, orig_node,
+ (tt_change + i)->addr, ttvn))
+ /* In case of problem while storing a
+ * global_entry, we stop the updating
+ * procedure without committing the
+ * ttvn change. This will avoid to send
+ * corrupted data on tt_request
+ */
+ return;
+ }
+}
+
+static void tt_fill_gtable(struct bat_priv *bat_priv,
+ struct tt_query_packet *tt_response)
+{
+ struct orig_node *orig_node = NULL;
+
+ orig_node = orig_hash_find(bat_priv, tt_response->src);
+ if (!orig_node)
+ goto out;
+
+ /* Purge the old table first.. */
+ tt_global_del_orig(bat_priv, orig_node, "Received full table");
+
+ _tt_update_changes(bat_priv, orig_node,
+ (struct tt_change *)(tt_response + 1),
+ tt_response->tt_data, tt_response->ttvn);
+
+ spin_lock_bh(&orig_node->tt_buff_lock);
+ kfree(orig_node->tt_buff);
+ orig_node->tt_buff_len = 0;
+ orig_node->tt_buff = NULL;
+ spin_unlock_bh(&orig_node->tt_buff_lock);
+
+ atomic_set(&orig_node->last_ttvn, tt_response->ttvn);
+
+out:
+ if (orig_node)
+ orig_node_free_ref(orig_node);
+}
+
+void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ uint16_t tt_num_changes, uint8_t ttvn,
+ struct tt_change *tt_change)
+{
+ _tt_update_changes(bat_priv, orig_node, tt_change, tt_num_changes,
+ ttvn);
+
+ tt_save_orig_buffer(bat_priv, orig_node, (unsigned char *)tt_change,
+ tt_num_changes);
+ atomic_set(&orig_node->last_ttvn, ttvn);
+}
+
+bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr)
+{
+ struct tt_local_entry *tt_local_entry;
+
+ spin_lock_bh(&bat_priv->tt_lhash_lock);
+ tt_local_entry = tt_local_hash_find(bat_priv, addr);
+ spin_unlock_bh(&bat_priv->tt_lhash_lock);
+
+ if (tt_local_entry)
+ return true;
+ return false;
+}
+
+void handle_tt_response(struct bat_priv *bat_priv,
+ struct tt_query_packet *tt_response)
+{
+ struct tt_req_node *node, *safe;
+ struct orig_node *orig_node = NULL;
+
+ bat_dbg(DBG_TT, bat_priv, "Received TT_RESPONSE from %pM for "
+ "ttvn %d t_size: %d [%c]\n",
+ tt_response->src, tt_response->ttvn,
+ tt_response->tt_data,
+ (tt_response->flags & TT_FULL_TABLE ? 'F' : '.'));
+
+ orig_node = orig_hash_find(bat_priv, tt_response->src);
+ if (!orig_node)
+ goto out;
+
+ if (tt_response->flags & TT_FULL_TABLE)
+ tt_fill_gtable(bat_priv, tt_response);
+ else
+ tt_update_changes(bat_priv, orig_node, tt_response->tt_data,
+ tt_response->ttvn,
+ (struct tt_change *)(tt_response + 1));
+
+ /* Delete the tt_req_node from pending tt_requests list */
+ spin_lock_bh(&bat_priv->tt_req_list_lock);
+ list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) {
+ if (!compare_eth(node->addr, tt_response->src))
+ continue;
+ list_del(&node->list);
+ kfree(node);
+ }
+ spin_unlock_bh(&bat_priv->tt_req_list_lock);
+
+ /* Recalculate the CRC for this orig_node and store it */
+ spin_lock_bh(&bat_priv->tt_ghash_lock);
+ orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
+out:
+ if (orig_node)
+ orig_node_free_ref(orig_node);
+}
+
+int tt_init(struct bat_priv *bat_priv)
+{
+ if (!tt_local_init(bat_priv))
+ return 0;
+
+ if (!tt_global_init(bat_priv))
+ return 0;
+
+ tt_start_timer(bat_priv);
+
+ return 1;
+}
+
+void tt_free(struct bat_priv *bat_priv)
+{
+ cancel_delayed_work_sync(&bat_priv->tt_work);
+
+ tt_local_table_free(bat_priv);
+ tt_global_table_free(bat_priv);
+ tt_req_list_free(bat_priv);
+ tt_changes_list_free(bat_priv);
+
+ kfree(bat_priv->tt_buff);
+}
+
+static void tt_purge(struct work_struct *work)
+{
+ struct delayed_work *delayed_work =
+ container_of(work, struct delayed_work, work);
+ struct bat_priv *bat_priv =
+ container_of(delayed_work, struct bat_priv, tt_work);
+
+ tt_local_purge(bat_priv);
+ tt_req_purge(bat_priv);
+
+ tt_start_timer(bat_priv);
+}
diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h
index 0f2b990..51f7e30 100644
--- a/net/batman-adv/translation-table.h
+++ b/net/batman-adv/translation-table.h
@@ -22,23 +22,43 @@
#ifndef _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
#define _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
-int tt_local_init(struct bat_priv *bat_priv);
+int tt_len(int changes_num);
+int tt_changes_fill_buffer(struct bat_priv *bat_priv,
+ unsigned char *buff, int buff_len);
+int tt_init(struct bat_priv *bat_priv);
void tt_local_add(struct net_device *soft_iface, const uint8_t *addr);
void tt_local_remove(struct bat_priv *bat_priv,
const uint8_t *addr, const char *message);
-int tt_local_fill_buffer(struct bat_priv *bat_priv,
- unsigned char *buff, int buff_len);
int tt_local_seq_print_text(struct seq_file *seq, void *offset);
-void tt_local_free(struct bat_priv *bat_priv);
-int tt_global_init(struct bat_priv *bat_priv);
void tt_global_add_orig(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const unsigned char *tt_buff, int tt_buff_len);
+int tt_global_add(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, const unsigned char *addr,
+ uint8_t ttvn);
int tt_global_seq_print_text(struct seq_file *seq, void *offset);
void tt_global_del_orig(struct bat_priv *bat_priv,
- struct orig_node *orig_node, const char *message);
-void tt_global_free(struct bat_priv *bat_priv);
+ struct orig_node *orig_node, const char *message);
+void tt_global_del(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, const unsigned char *addr,
+ const char *message);
struct orig_node *transtable_search(struct bat_priv *bat_priv,
const uint8_t *addr);
+void tt_save_orig_buffer(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ const unsigned char *tt_buff, uint8_t tt_num_changes);
+uint16_t tt_local_crc(struct bat_priv *bat_priv);
+uint16_t tt_global_crc(struct bat_priv *bat_priv, struct orig_node *orig_node);
+void tt_free(struct bat_priv *bat_priv);
+int send_tt_request(struct bat_priv *bat_priv,
+ struct orig_node *dst_orig_node, uint8_t hvn,
+ uint16_t tt_crc, bool full_table);
+bool send_tt_response(struct bat_priv *bat_priv,
+ struct tt_query_packet *tt_request);
+void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ uint16_t tt_num_changes, uint8_t ttvn,
+ struct tt_change *tt_change);
+bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr);
+void handle_tt_response(struct bat_priv *bat_priv,
+ struct tt_query_packet *tt_response);
#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 65b3222..3b642a9 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -75,8 +75,12 @@ struct orig_node {
unsigned long batman_seqno_reset;
uint8_t gw_flags;
uint8_t flags;
+ atomic_t last_ttvn; /* last seen translation table version number */
+ uint16_t tt_crc;
unsigned char *tt_buff;
int16_t tt_buff_len;
+ spinlock_t tt_buff_lock; /* protects tt_buff */
+ atomic_t tt_size;
uint32_t last_real_seqno;
uint8_t last_ttl;
unsigned long bcast_bits[NUM_WORDS];
@@ -94,6 +98,7 @@ struct orig_node {
spinlock_t ogm_cnt_lock;
/* bcast_seqno_lock protects bcast_bits, last_bcast_seqno */
spinlock_t bcast_seqno_lock;
+ spinlock_t tt_list_lock; /* protects tt_list */
atomic_t bond_candidates;
struct list_head bond_list;
};
@@ -145,6 +150,9 @@ struct bat_priv {
atomic_t bcast_seqno;
atomic_t bcast_queue_left;
atomic_t batman_queue_left;
+ atomic_t ttvn; /* tranlation table version number */
+ atomic_t tt_ogm_append_cnt;
+ atomic_t tt_local_changes; /* changes registered in a OGM interval */
char num_ifaces;
struct debug_log *debug_log;
struct kobject *mesh_obj;
@@ -153,22 +161,30 @@ struct bat_priv {
struct hlist_head forw_bcast_list;
struct hlist_head gw_list;
struct hlist_head softif_neigh_vids;
+ struct list_head tt_changes_list; /* tracks changes in a OGM int */
struct list_head vis_send_list;
struct hashtable_t *orig_hash;
struct hashtable_t *tt_local_hash;
struct hashtable_t *tt_global_hash;
+ struct list_head tt_req_list; /* list of pending tt_requests */
struct hashtable_t *vis_hash;
spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
spinlock_t forw_bcast_list_lock; /* protects */
+ spinlock_t tt_changes_list_lock; /* protects tt_changes */
spinlock_t tt_lhash_lock; /* protects tt_local_hash */
spinlock_t tt_ghash_lock; /* protects tt_global_hash */
+ spinlock_t tt_req_list_lock; /* protects tt_req_list */
spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
spinlock_t vis_hash_lock; /* protects vis_hash */
spinlock_t vis_list_lock; /* protects vis_info::recv_list */
spinlock_t softif_neigh_lock; /* protects soft-interface neigh list */
spinlock_t softif_neigh_vid_lock; /* protects soft-interface vid list */
- int16_t num_local_tt;
- atomic_t tt_local_changed;
+ atomic_t num_local_tt;
+ /* Checksum of the local table, recomputed before sending a new OGM */
+ atomic_t tt_crc;
+ unsigned char *tt_buff;
+ int16_t tt_buff_len;
+ spinlock_t tt_buff_lock; /* protects tt_buff */
struct delayed_work tt_work;
struct delayed_work orig_work;
struct delayed_work vis_work;
@@ -202,9 +218,22 @@ struct tt_local_entry {
struct tt_global_entry {
uint8_t addr[ETH_ALEN];
struct orig_node *orig_node;
+ uint8_t ttvn;
+ /* entry in the global table */
struct hlist_node hash_entry;
};
+struct tt_change_node {
+ struct list_head list;
+ struct tt_change change;
+};
+
+struct tt_req_node {
+ uint8_t addr[ETH_ALEN];
+ unsigned long issued_at;
+ struct list_head list;
+};
+
/**
* forw_packet - structure for forw_list maintaining packets to be
* send/forwarded
diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
index 6eabf42..32b125f 100644
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@ -325,6 +325,9 @@ find_router:
unicast_packet->ttl = TTL;
/* copy the destination for faster routing */
memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
+ /* set the destination tt version number */
+ unicast_packet->ttvn =
+ (uint8_t)atomic_read(&orig_node->last_ttvn);
if (atomic_read(&bat_priv->fragmentation) &&
data_len + sizeof(*unicast_packet) >
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 07/12] batman-adv: improved roaming mechanism
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (5 preceding siblings ...)
2011-06-20 10:16 ` [B.A.T.M.A.N.] [PATCH 06/12] batman-adv: improved client announcement mechanism Sven Eckelmann
@ 2011-06-20 10:17 ` Sven Eckelmann
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 08/12] batman-adv: protect the local and the global trans-tables with rcu Sven Eckelmann
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:17 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n
From: Antonio Quartulli <ordex@autistici.org>
With the current client announcement implementation, in case of roaming,
an update is triggered on the new AP serving the client. At that point
the new information is spread around by means of the OGM broadcasting
mechanism. Until this operations is not executed, no node is able to
correctly route traffic towards the client. This obviously causes packet
drops and introduces a delay in the time needed by the client to recover
its connections.
A new packet type called ROAMING_ADVERTISEMENT is added to account this
issue.
This message is sent in case of roaming from the new AP serving the
client to the old one and will contain the client MAC address. In this
way an out-of-OGM update is immediately committed, so that the old node
can update its global translation table. Traffic reaching this node will
then be redirected to the correct destination utilising the fresher
information. Thus reducing the packet drops and the connection recovery
delay.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/hard-interface.c | 4 +
net/batman-adv/main.c | 2 +
net/batman-adv/main.h | 6 +-
net/batman-adv/originator.c | 1 +
net/batman-adv/packet.h | 13 ++-
net/batman-adv/routing.c | 61 +++++++++-
net/batman-adv/routing.h | 1 +
net/batman-adv/send.c | 1 +
net/batman-adv/soft-interface.c | 3 +-
net/batman-adv/translation-table.c | 241 ++++++++++++++++++++++++++++++++---
net/batman-adv/translation-table.h | 8 +-
net/batman-adv/types.h | 26 ++++-
12 files changed, 334 insertions(+), 33 deletions(-)
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index d40426c..55b5def 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -658,6 +658,10 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
case BAT_TT_QUERY:
ret = recv_tt_query(skb, hard_iface);
break;
+ /* Roaming advertisement */
+ case BAT_ROAM_ADV:
+ ret = recv_roam_adv(skb, hard_iface);
+ break;
default:
ret = NET_RX_DROP;
}
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 49a5e64..3318ee2 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -88,6 +88,7 @@ int mesh_init(struct net_device *soft_iface)
spin_lock_init(&bat_priv->tt_ghash_lock);
spin_lock_init(&bat_priv->tt_changes_list_lock);
spin_lock_init(&bat_priv->tt_req_list_lock);
+ spin_lock_init(&bat_priv->tt_roam_list_lock);
spin_lock_init(&bat_priv->tt_buff_lock);
spin_lock_init(&bat_priv->gw_list_lock);
spin_lock_init(&bat_priv->vis_hash_lock);
@@ -101,6 +102,7 @@ int mesh_init(struct net_device *soft_iface)
INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
INIT_LIST_HEAD(&bat_priv->tt_changes_list);
INIT_LIST_HEAD(&bat_priv->tt_req_list);
+ INIT_LIST_HEAD(&bat_priv->tt_roam_list);
if (originator_init(bat_priv) < 1)
goto err;
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 6f53a1d..8eae05e 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -42,7 +42,7 @@
* -> TODO: check influence on TQ_LOCAL_WINDOW_SIZE */
#define PURGE_TIMEOUT 200
#define TT_LOCAL_TIMEOUT 3600 /* in seconds */
-
+#define TT_CLIENT_ROAM_TIMEOUT 600
/* sliding packet range of received originator messages in squence numbers
* (should be a multiple of our word size) */
#define TQ_LOCAL_WINDOW_SIZE 64
@@ -55,6 +55,10 @@
#define TT_OGM_APPEND_MAX 3 /* number of OGMs sent with the last tt diff */
+#define ROAMING_MAX_TIME 20 /* Time in which a client can roam at most
+ * ROAMING_MAX_COUNT times */
+#define ROAMING_MAX_COUNT 5
+
#define NO_FLAGS 0
#define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE)
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 25e7e50..338b3c5 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -219,6 +219,7 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr)
/* extra reference for return */
atomic_set(&orig_node->refcount, 2);
+ orig_node->tt_poss_change = false;
orig_node->bat_priv = bat_priv;
memcpy(orig_node->orig, addr, ETH_ALEN);
orig_node->router = NULL;
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 407dd2e..c5f081d 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -31,7 +31,8 @@ enum bat_packettype {
BAT_BCAST = 0x04,
BAT_VIS = 0x05,
BAT_UNICAST_FRAG = 0x06,
- BAT_TT_QUERY = 0x07
+ BAT_TT_QUERY = 0x07,
+ BAT_ROAM_ADV = 0x08
};
/* this file is included by batctl which needs these defines */
@@ -194,6 +195,16 @@ struct tt_query_packet {
uint16_t tt_data;
} __packed;
+struct roam_adv_packet {
+ uint8_t packet_type;
+ uint8_t version;
+ uint8_t ttl;
+ uint8_t reserved;
+ uint8_t dst[ETH_ALEN];
+ uint8_t src[ETH_ALEN];
+ uint8_t client[ETH_ALEN];
+} __packed;
+
struct tt_change {
uint8_t flags;
uint8_t addr[ETH_ALEN];
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 8b0f833..05d50ca 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -93,6 +93,9 @@ static void update_transtable(struct bat_priv *bat_priv,
spin_lock_bh(&bat_priv->tt_ghash_lock);
orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
spin_unlock_bh(&bat_priv->tt_ghash_lock);
+ /* Roaming phase is over: tables are in sync again. I can
+ * unset the flag */
+ orig_node->tt_poss_change = false;
} else {
/* if we missed more than one change or our tables are not
* in sync anymore -> request fresh tt data */
@@ -1252,6 +1255,54 @@ out:
return NET_RX_DROP;
}
+int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
+ struct roam_adv_packet *roam_adv_packet;
+ struct orig_node *orig_node;
+ struct ethhdr *ethhdr;
+
+ /* drop packet if it has not necessary minimum size */
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct roam_adv_packet))))
+ goto out;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with unicast indication but broadcast recipient */
+ if (is_broadcast_ether_addr(ethhdr->h_dest))
+ goto out;
+
+ /* packet with broadcast sender address */
+ if (is_broadcast_ether_addr(ethhdr->h_source))
+ goto out;
+
+ roam_adv_packet = (struct roam_adv_packet *)skb->data;
+
+ if (!is_my_mac(roam_adv_packet->dst))
+ return route_unicast_packet(skb, recv_if);
+
+ orig_node = orig_hash_find(bat_priv, roam_adv_packet->src);
+ if (!orig_node)
+ goto out;
+
+ bat_dbg(DBG_TT, bat_priv, "Received ROAMING_ADV from %pM "
+ "(client %pM)\n", roam_adv_packet->src,
+ roam_adv_packet->client);
+
+ tt_global_add(bat_priv, orig_node, roam_adv_packet->client,
+ atomic_read(&orig_node->last_ttvn) + 1, true);
+
+ /* Roaming phase starts: I have new information but the ttvn has not
+ * been incremented yet. This flag will make me check all the incoming
+ * packets for the correct destination. */
+ bat_priv->tt_poss_change = true;
+
+ orig_node_free_ref(orig_node);
+out:
+ /* returning NET_RX_DROP will make the caller function kfree the skb */
+ return NET_RX_DROP;
+}
+
/* find a suitable router for this originator, and use
* bonding if possible. increases the found neighbors
* refcount.*/
@@ -1445,6 +1496,7 @@ static int check_unicast_ttvn(struct bat_priv *bat_priv,
struct ethhdr *ethhdr;
struct hard_iface *primary_if;
struct unicast_packet *unicast_packet;
+ bool tt_poss_change;
/* I could need to modify it */
if (skb_cow(skb, sizeof(struct unicast_packet)) < 0)
@@ -1452,27 +1504,28 @@ static int check_unicast_ttvn(struct bat_priv *bat_priv,
unicast_packet = (struct unicast_packet *)skb->data;
- if (is_my_mac(unicast_packet->dest))
+ if (is_my_mac(unicast_packet->dest)) {
+ tt_poss_change = bat_priv->tt_poss_change;
curr_ttvn = (uint8_t)atomic_read(&bat_priv->ttvn);
- else {
+ } else {
orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
if (!orig_node)
return 0;
curr_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
+ tt_poss_change = orig_node->tt_poss_change;
orig_node_free_ref(orig_node);
}
/* Check whether I have to reroute the packet */
- if (seq_before(unicast_packet->ttvn, curr_ttvn)) {
+ if (seq_before(unicast_packet->ttvn, curr_ttvn) || tt_poss_change) {
/* Linearize the skb before accessing it */
if (skb_linearize(skb) < 0)
return 0;
ethhdr = (struct ethhdr *)(skb->data +
sizeof(struct unicast_packet));
-
orig_node = transtable_search(bat_priv, ethhdr->h_dest);
if (!orig_node) {
diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h
index e77d464..fb14e95 100644
--- a/net/batman-adv/routing.h
+++ b/net/batman-adv/routing.h
@@ -37,6 +37,7 @@ int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_bat_packet(struct sk_buff *skb, struct hard_iface *recv_if);
int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if);
struct neigh_node *find_router(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const struct hard_iface *recv_if);
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 6b14075..7a2f082 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -303,6 +303,7 @@ void schedule_own_packet(struct hard_iface *hard_iface)
prepare_packet_buffer(bat_priv, hard_iface);
/* Increment the TTVN only once per OGM interval */
atomic_inc(&bat_priv->ttvn);
+ bat_priv->tt_poss_change = false;
}
/* if the changes have been sent enough times */
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index c288d93..3371ece 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -534,7 +534,7 @@ static int interface_set_mac_addr(struct net_device *dev, void *p)
/* only modify transtable if it has been initialised before */
if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
tt_local_remove(bat_priv, dev->dev_addr,
- "mac address changed");
+ "mac address changed", false);
tt_local_add(dev, addr->sa_data);
}
@@ -836,6 +836,7 @@ struct net_device *softif_create(const char *name)
bat_priv->tt_buff = NULL;
bat_priv->tt_buff_len = 0;
+ bat_priv->tt_poss_change = false;
bat_priv->primary_if = NULL;
bat_priv->num_ifaces = 0;
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 597cd1a..d516d85 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -126,7 +126,7 @@ static bool is_out_of_time(unsigned long starting_time, unsigned long timeout)
}
static void tt_local_event(struct bat_priv *bat_priv, uint8_t op,
- const uint8_t *addr)
+ const uint8_t *addr, uint8_t roaming)
{
struct tt_change_node *tt_change_node;
@@ -136,6 +136,9 @@ static void tt_local_event(struct bat_priv *bat_priv, uint8_t op,
return;
tt_change_node->change.flags = op;
+ if (roaming)
+ tt_change_node->change.flags |= TT_CLIENT_ROAM;
+
memcpy(tt_change_node->change.addr, addr, ETH_ALEN);
spin_lock_bh(&bat_priv->tt_changes_list_lock);
@@ -170,6 +173,7 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
struct bat_priv *bat_priv = netdev_priv(soft_iface);
struct tt_local_entry *tt_local_entry;
struct tt_global_entry *tt_global_entry;
+ uint8_t roam_addr[ETH_ALEN];
spin_lock_bh(&bat_priv->tt_lhash_lock);
tt_local_entry = tt_local_hash_find(bat_priv, addr);
@@ -183,7 +187,7 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
if (!tt_local_entry)
goto unlock;
- tt_local_event(bat_priv, NO_FLAGS, addr);
+ tt_local_event(bat_priv, NO_FLAGS, addr, false);
bat_dbg(DBG_TT, bat_priv,
"Creating new local tt entry: %pM (ttvn: %d)\n", addr,
@@ -208,11 +212,19 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
tt_global_entry = tt_global_hash_find(bat_priv, addr);
- if (tt_global_entry)
+ /* Check whether it is a roaming! */
+ if (tt_global_entry) {
+ memcpy(roam_addr, tt_global_entry->addr, ETH_ALEN);
+ /* This node is probably going to update its tt table */
+ tt_global_entry->orig_node->tt_poss_change = true;
_tt_global_del(bat_priv, tt_global_entry,
"local tt received");
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
+ send_roam_adv(bat_priv, tt_global_entry->addr,
+ tt_global_entry->orig_node);
+ } else
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
return;
unlock:
spin_unlock_bh(&bat_priv->tt_lhash_lock);
@@ -367,7 +379,7 @@ static void tt_local_del(struct bat_priv *bat_priv,
}
void tt_local_remove(struct bat_priv *bat_priv, const uint8_t *addr,
- const char *message)
+ const char *message, bool roaming)
{
struct tt_local_entry *tt_local_entry;
@@ -375,7 +387,8 @@ void tt_local_remove(struct bat_priv *bat_priv, const uint8_t *addr,
tt_local_entry = tt_local_hash_find(bat_priv, addr);
if (tt_local_entry) {
- tt_local_event(bat_priv, TT_CHANGE_DEL, tt_local_entry->addr);
+ tt_local_event(bat_priv, TT_CHANGE_DEL, tt_local_entry->addr,
+ roaming);
tt_local_del(bat_priv, tt_local_entry, message);
}
spin_unlock_bh(&bat_priv->tt_lhash_lock);
@@ -404,7 +417,7 @@ static void tt_local_purge(struct bat_priv *bat_priv)
continue;
tt_local_event(bat_priv, TT_CHANGE_DEL,
- tt_local_entry->addr);
+ tt_local_entry->addr, false);
tt_local_del(bat_priv, tt_local_entry,
"address timed out");
}
@@ -476,7 +489,7 @@ static void tt_changes_list_free(struct bat_priv *bat_priv)
/* caller must hold orig_node refcount */
int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
- const unsigned char *tt_addr, uint8_t ttvn)
+ const unsigned char *tt_addr, uint8_t ttvn, bool roaming)
{
struct tt_global_entry *tt_global_entry;
struct tt_local_entry *tt_local_entry;
@@ -496,6 +509,8 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
atomic_inc(&orig_node->refcount);
tt_global_entry->orig_node = orig_node;
tt_global_entry->ttvn = ttvn;
+ tt_global_entry->flags = NO_FLAGS;
+ tt_global_entry->roam_at = 0;
atomic_inc(&orig_node->tt_size);
hash_add(bat_priv->tt_global_hash, compare_gtt,
choose_orig, tt_global_entry,
@@ -506,10 +521,12 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
orig_node_tmp = tt_global_entry->orig_node;
atomic_inc(&orig_node->refcount);
tt_global_entry->orig_node = orig_node;
- tt_global_entry->ttvn = ttvn;
orig_node_free_ref(orig_node_tmp);
atomic_inc(&orig_node->tt_size);
}
+ tt_global_entry->ttvn = ttvn;
+ tt_global_entry->flags = NO_FLAGS;
+ tt_global_entry->roam_at = 0;
}
spin_unlock_bh(&bat_priv->tt_ghash_lock);
@@ -523,8 +540,9 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
tt_local_entry = tt_local_hash_find(bat_priv, tt_addr);
if (tt_local_entry)
- tt_local_del(bat_priv, tt_local_entry,
- "global tt received");
+ tt_local_remove(bat_priv, tt_global_entry->addr,
+ "global tt received", roaming);
+
spin_unlock_bh(&bat_priv->tt_lhash_lock);
return 1;
unlock:
@@ -637,7 +655,7 @@ static void _tt_global_del(struct bat_priv *bat_priv,
void tt_global_del(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
- const char *message)
+ const char *message, bool roaming)
{
struct tt_global_entry *tt_global_entry;
@@ -645,9 +663,15 @@ void tt_global_del(struct bat_priv *bat_priv,
tt_global_entry = tt_global_hash_find(bat_priv, addr);
if (tt_global_entry && tt_global_entry->orig_node == orig_node) {
+ if (roaming) {
+ tt_global_entry->flags |= TT_CLIENT_ROAM;
+ tt_global_entry->roam_at = jiffies;
+ goto out;
+ }
atomic_dec(&orig_node->tt_size);
_tt_global_del(bat_priv, tt_global_entry, message);
}
+out:
spin_unlock_bh(&bat_priv->tt_ghash_lock);
}
@@ -685,6 +709,35 @@ static void tt_global_entry_free(struct hlist_node *node, void *arg)
kfree(data);
}
+static void tt_global_roam_purge(struct bat_priv *bat_priv)
+{
+ struct hashtable_t *hash = bat_priv->tt_global_hash;
+ struct tt_global_entry *tt_global_entry;
+ struct hlist_node *node, *node_tmp;
+ struct hlist_head *head;
+ int i;
+
+ spin_lock_bh(&bat_priv->tt_ghash_lock);
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry_safe(tt_global_entry, node, node_tmp,
+ head, hash_entry) {
+ if (!(tt_global_entry->flags & TT_CLIENT_ROAM))
+ continue;
+ if (!is_out_of_time(tt_global_entry->roam_at,
+ TT_CLIENT_ROAM_TIMEOUT * 1000))
+ continue;
+
+ _tt_global_del(bat_priv, tt_global_entry,
+ "Roaming timeout");
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->tt_ghash_lock);
+}
+
static void tt_global_table_free(struct bat_priv *bat_priv)
{
if (!bat_priv->tt_global_hash)
@@ -734,6 +787,12 @@ uint16_t tt_global_crc(struct bat_priv *bat_priv, struct orig_node *orig_node)
head, hash_entry) {
if (compare_eth(tt_global_entry->orig_node,
orig_node)) {
+ /* Roaming clients are in the global table for
+ * consistency only. They don't have to be
+ * taken into account while computing the
+ * global crc */
+ if (tt_global_entry->flags & TT_CLIENT_ROAM)
+ continue;
total_one = 0;
for (j = 0; j < ETH_ALEN; j++)
total_one = crc16_byte(total_one,
@@ -858,6 +917,9 @@ static int tt_global_valid_entry(const void *entry_ptr, const void *data_ptr)
const struct tt_global_entry *tt_global_entry = entry_ptr;
const struct orig_node *orig_node = data_ptr;
+ if (tt_global_entry->flags & TT_CLIENT_ROAM)
+ return 0;
+
return (tt_global_entry->orig_node == orig_node);
}
@@ -1251,10 +1313,11 @@ static void _tt_update_changes(struct bat_priv *bat_priv,
if ((tt_change + i)->flags & TT_CHANGE_DEL)
tt_global_del(bat_priv, orig_node,
(tt_change + i)->addr,
- "tt removed by changes");
+ "tt removed by changes",
+ (tt_change + i)->flags & TT_CLIENT_ROAM);
else
if (!tt_global_add(bat_priv, orig_node,
- (tt_change + i)->addr, ttvn))
+ (tt_change + i)->addr, ttvn, false))
/* In case of problem while storing a
* global_entry, we stop the updating
* procedure without committing the
@@ -1356,6 +1419,9 @@ void handle_tt_response(struct bat_priv *bat_priv,
spin_lock_bh(&bat_priv->tt_ghash_lock);
orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
spin_unlock_bh(&bat_priv->tt_ghash_lock);
+ /* Roaming phase is over: tables are in sync again. I can
+ * unset the flag */
+ orig_node->tt_poss_change = false;
out:
if (orig_node)
orig_node_free_ref(orig_node);
@@ -1374,16 +1440,134 @@ int tt_init(struct bat_priv *bat_priv)
return 1;
}
-void tt_free(struct bat_priv *bat_priv)
+static void tt_roam_list_free(struct bat_priv *bat_priv)
{
- cancel_delayed_work_sync(&bat_priv->tt_work);
+ struct tt_roam_node *node, *safe;
- tt_local_table_free(bat_priv);
- tt_global_table_free(bat_priv);
- tt_req_list_free(bat_priv);
- tt_changes_list_free(bat_priv);
+ spin_lock_bh(&bat_priv->tt_roam_list_lock);
- kfree(bat_priv->tt_buff);
+ list_for_each_entry_safe(node, safe, &bat_priv->tt_roam_list, list) {
+ list_del(&node->list);
+ kfree(node);
+ }
+
+ spin_unlock_bh(&bat_priv->tt_roam_list_lock);
+}
+
+static void tt_roam_purge(struct bat_priv *bat_priv)
+{
+ struct tt_roam_node *node, *safe;
+
+ spin_lock_bh(&bat_priv->tt_roam_list_lock);
+ list_for_each_entry_safe(node, safe, &bat_priv->tt_roam_list, list) {
+ if (!is_out_of_time(node->first_time,
+ ROAMING_MAX_TIME * 1000))
+ continue;
+
+ list_del(&node->list);
+ kfree(node);
+ }
+ spin_unlock_bh(&bat_priv->tt_roam_list_lock);
+}
+
+/* This function checks whether the client already reached the
+ * maximum number of possible roaming phases. In this case the ROAMING_ADV
+ * will not be sent.
+ *
+ * returns true if the ROAMING_ADV can be sent, false otherwise */
+static bool tt_check_roam_count(struct bat_priv *bat_priv,
+ uint8_t *client)
+{
+ struct tt_roam_node *tt_roam_node;
+ bool ret = false;
+
+ spin_lock_bh(&bat_priv->tt_roam_list_lock);
+ /* The new tt_req will be issued only if I'm not waiting for a
+ * reply from the same orig_node yet */
+ list_for_each_entry(tt_roam_node, &bat_priv->tt_roam_list, list) {
+ if (!compare_eth(tt_roam_node->addr, client))
+ continue;
+
+ if (is_out_of_time(tt_roam_node->first_time,
+ ROAMING_MAX_TIME * 1000))
+ continue;
+
+ if (!atomic_dec_not_zero(&tt_roam_node->counter))
+ /* Sorry, you roamed too many times! */
+ goto unlock;
+ ret = true;
+ break;
+ }
+
+ if (!ret) {
+ tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC);
+ if (!tt_roam_node)
+ goto unlock;
+
+ tt_roam_node->first_time = jiffies;
+ atomic_set(&tt_roam_node->counter, ROAMING_MAX_COUNT - 1);
+ memcpy(tt_roam_node->addr, client, ETH_ALEN);
+
+ list_add(&tt_roam_node->list, &bat_priv->tt_roam_list);
+ ret = true;
+ }
+
+unlock:
+ spin_unlock_bh(&bat_priv->tt_roam_list_lock);
+ return ret;
+}
+
+void send_roam_adv(struct bat_priv *bat_priv, uint8_t *client,
+ struct orig_node *orig_node)
+{
+ struct neigh_node *neigh_node = NULL;
+ struct sk_buff *skb = NULL;
+ struct roam_adv_packet *roam_adv_packet;
+ int ret = 1;
+ struct hard_iface *primary_if;
+
+ /* before going on we have to check whether the client has
+ * already roamed to us too many times */
+ if (!tt_check_roam_count(bat_priv, client))
+ goto out;
+
+ skb = dev_alloc_skb(sizeof(struct roam_adv_packet) + ETH_HLEN);
+ if (!skb)
+ goto out;
+
+ skb_reserve(skb, ETH_HLEN);
+
+ roam_adv_packet = (struct roam_adv_packet *)skb_put(skb,
+ sizeof(struct roam_adv_packet));
+
+ roam_adv_packet->packet_type = BAT_ROAM_ADV;
+ roam_adv_packet->version = COMPAT_VERSION;
+ roam_adv_packet->ttl = TTL;
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+ memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN);
+ hardif_free_ref(primary_if);
+ memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN);
+ memcpy(roam_adv_packet->client, client, ETH_ALEN);
+
+ neigh_node = orig_node_get_router(orig_node);
+ if (!neigh_node)
+ goto out;
+
+ bat_dbg(DBG_TT, bat_priv,
+ "Sending ROAMING_ADV to %pM (client %pM) via %pM\n",
+ orig_node->orig, client, neigh_node->addr);
+
+ send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ ret = 0;
+
+out:
+ if (neigh_node)
+ neigh_node_free_ref(neigh_node);
+ if (ret)
+ kfree_skb(skb);
+ return;
}
static void tt_purge(struct work_struct *work)
@@ -1394,7 +1578,22 @@ static void tt_purge(struct work_struct *work)
container_of(delayed_work, struct bat_priv, tt_work);
tt_local_purge(bat_priv);
+ tt_global_roam_purge(bat_priv);
tt_req_purge(bat_priv);
+ tt_roam_purge(bat_priv);
tt_start_timer(bat_priv);
}
+
+void tt_free(struct bat_priv *bat_priv)
+{
+ cancel_delayed_work_sync(&bat_priv->tt_work);
+
+ tt_local_table_free(bat_priv);
+ tt_global_table_free(bat_priv);
+ tt_req_list_free(bat_priv);
+ tt_changes_list_free(bat_priv);
+ tt_roam_list_free(bat_priv);
+
+ kfree(bat_priv->tt_buff);
+}
diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h
index 51f7e30..1cd2d39 100644
--- a/net/batman-adv/translation-table.h
+++ b/net/batman-adv/translation-table.h
@@ -28,20 +28,20 @@ int tt_changes_fill_buffer(struct bat_priv *bat_priv,
int tt_init(struct bat_priv *bat_priv);
void tt_local_add(struct net_device *soft_iface, const uint8_t *addr);
void tt_local_remove(struct bat_priv *bat_priv,
- const uint8_t *addr, const char *message);
+ const uint8_t *addr, const char *message, bool roaming);
int tt_local_seq_print_text(struct seq_file *seq, void *offset);
void tt_global_add_orig(struct bat_priv *bat_priv,
struct orig_node *orig_node,
const unsigned char *tt_buff, int tt_buff_len);
int tt_global_add(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
- uint8_t ttvn);
+ uint8_t ttvn, bool roaming);
int tt_global_seq_print_text(struct seq_file *seq, void *offset);
void tt_global_del_orig(struct bat_priv *bat_priv,
struct orig_node *orig_node, const char *message);
void tt_global_del(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
- const char *message);
+ const char *message, bool roaming);
struct orig_node *transtable_search(struct bat_priv *bat_priv,
const uint8_t *addr);
void tt_save_orig_buffer(struct bat_priv *bat_priv, struct orig_node *orig_node,
@@ -60,5 +60,7 @@ void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr);
void handle_tt_response(struct bat_priv *bat_priv,
struct tt_query_packet *tt_response);
+void send_roam_adv(struct bat_priv *bat_priv, uint8_t *client,
+ struct orig_node *orig_node);
#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 3b642a9..9c84fa9 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -81,6 +81,12 @@ struct orig_node {
int16_t tt_buff_len;
spinlock_t tt_buff_lock; /* protects tt_buff */
atomic_t tt_size;
+ /* The tt_poss_change flag is used to detect an ongoing roaming phase.
+ * If true, then I sent a Roaming_adv to this orig_node and I have to
+ * inspect every packet directed to it to check whether it is still
+ * the true destination or not. This flag will be reset to false as
+ * soon as I receive a new TTVN from this orig_node */
+ bool tt_poss_change;
uint32_t last_real_seqno;
uint8_t last_ttl;
unsigned long bcast_bits[NUM_WORDS];
@@ -153,6 +159,12 @@ struct bat_priv {
atomic_t ttvn; /* tranlation table version number */
atomic_t tt_ogm_append_cnt;
atomic_t tt_local_changes; /* changes registered in a OGM interval */
+ /* The tt_poss_change flag is used to detect an ongoing roaming phase.
+ * If true, then I received a Roaming_adv and I have to inspect every
+ * packet directed to me to check whether I am still the true
+ * destination or not. This flag will be reset to false as soon as I
+ * increase my TTVN */
+ bool tt_poss_change;
char num_ifaces;
struct debug_log *debug_log;
struct kobject *mesh_obj;
@@ -167,6 +179,7 @@ struct bat_priv {
struct hashtable_t *tt_local_hash;
struct hashtable_t *tt_global_hash;
struct list_head tt_req_list; /* list of pending tt_requests */
+ struct list_head tt_roam_list;
struct hashtable_t *vis_hash;
spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
spinlock_t forw_bcast_list_lock; /* protects */
@@ -174,6 +187,7 @@ struct bat_priv {
spinlock_t tt_lhash_lock; /* protects tt_local_hash */
spinlock_t tt_ghash_lock; /* protects tt_global_hash */
spinlock_t tt_req_list_lock; /* protects tt_req_list */
+ spinlock_t tt_roam_list_lock; /* protects tt_roam_list */
spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
spinlock_t vis_hash_lock; /* protects vis_hash */
spinlock_t vis_list_lock; /* protects vis_info::recv_list */
@@ -219,8 +233,9 @@ struct tt_global_entry {
uint8_t addr[ETH_ALEN];
struct orig_node *orig_node;
uint8_t ttvn;
- /* entry in the global table */
- struct hlist_node hash_entry;
+ uint8_t flags; /* only TT_GLOBAL_ROAM is used */
+ unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
+ struct hlist_node hash_entry; /* entry in the global table */
};
struct tt_change_node {
@@ -234,6 +249,13 @@ struct tt_req_node {
struct list_head list;
};
+struct tt_roam_node {
+ uint8_t addr[ETH_ALEN];
+ atomic_t counter;
+ unsigned long first_time;
+ struct list_head list;
+};
+
/**
* forw_packet - structure for forw_list maintaining packets to be
* send/forwarded
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 08/12] batman-adv: protect the local and the global trans-tables with rcu
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (6 preceding siblings ...)
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 07/12] batman-adv: improved roaming mechanism Sven Eckelmann
@ 2011-06-20 10:17 ` Sven Eckelmann
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 09/12] batman-adv: add wrapper function to throw uevent in userspace Sven Eckelmann
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:17 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n
From: Antonio Quartulli <ordex@autistici.org>
The local and the global translation-tables are now lock free and rcu
protected.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Acked-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/main.c | 2 -
net/batman-adv/routing.c | 2 -
net/batman-adv/translation-table.c | 255 ++++++++++++++++++++----------------
net/batman-adv/types.h | 6 +-
net/batman-adv/vis.c | 13 +-
5 files changed, 150 insertions(+), 128 deletions(-)
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 3318ee2..c2b06b7 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -84,8 +84,6 @@ int mesh_init(struct net_device *soft_iface)
spin_lock_init(&bat_priv->forw_bat_list_lock);
spin_lock_init(&bat_priv->forw_bcast_list_lock);
- spin_lock_init(&bat_priv->tt_lhash_lock);
- spin_lock_init(&bat_priv->tt_ghash_lock);
spin_lock_init(&bat_priv->tt_changes_list_lock);
spin_lock_init(&bat_priv->tt_req_list_lock);
spin_lock_init(&bat_priv->tt_roam_list_lock);
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 05d50ca..0ce090c 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -90,9 +90,7 @@ static void update_transtable(struct bat_priv *bat_priv,
/* Even if we received the crc into the OGM, we prefer
* to recompute it to spot any possible inconsistency
* in the global table */
- spin_lock_bh(&bat_priv->tt_ghash_lock);
orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
/* Roaming phase is over: tables are in sync again. I can
* unset the flag */
orig_node->tt_poss_change = false;
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index d516d85..5f1fcd5 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -80,6 +80,9 @@ static struct tt_local_entry *tt_local_hash_find(struct bat_priv *bat_priv,
if (!compare_eth(tt_local_entry, data))
continue;
+ if (!atomic_inc_not_zero(&tt_local_entry->refcount))
+ continue;
+
tt_local_entry_tmp = tt_local_entry;
break;
}
@@ -109,6 +112,9 @@ static struct tt_global_entry *tt_global_hash_find(struct bat_priv *bat_priv,
if (!compare_eth(tt_global_entry, data))
continue;
+ if (!atomic_inc_not_zero(&tt_global_entry->refcount))
+ continue;
+
tt_global_entry_tmp = tt_global_entry;
break;
}
@@ -125,8 +131,20 @@ static bool is_out_of_time(unsigned long starting_time, unsigned long timeout)
return time_after(jiffies, deadline);
}
+static void tt_local_entry_free_ref(struct tt_local_entry *tt_local_entry)
+{
+ if (atomic_dec_and_test(&tt_local_entry->refcount))
+ kfree_rcu(tt_local_entry, rcu);
+}
+
+static void tt_global_entry_free_ref(struct tt_global_entry *tt_global_entry)
+{
+ if (atomic_dec_and_test(&tt_global_entry->refcount))
+ kfree_rcu(tt_global_entry, rcu);
+}
+
static void tt_local_event(struct bat_priv *bat_priv, uint8_t op,
- const uint8_t *addr, uint8_t roaming)
+ const uint8_t *addr, bool roaming)
{
struct tt_change_node *tt_change_node;
@@ -171,21 +189,19 @@ static int tt_local_init(struct bat_priv *bat_priv)
void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
{
struct bat_priv *bat_priv = netdev_priv(soft_iface);
- struct tt_local_entry *tt_local_entry;
- struct tt_global_entry *tt_global_entry;
- uint8_t roam_addr[ETH_ALEN];
+ struct tt_local_entry *tt_local_entry = NULL;
+ struct tt_global_entry *tt_global_entry = NULL;
- spin_lock_bh(&bat_priv->tt_lhash_lock);
tt_local_entry = tt_local_hash_find(bat_priv, addr);
if (tt_local_entry) {
tt_local_entry->last_seen = jiffies;
- goto unlock;
+ goto out;
}
tt_local_entry = kmalloc(sizeof(*tt_local_entry), GFP_ATOMIC);
if (!tt_local_entry)
- goto unlock;
+ goto out;
tt_local_event(bat_priv, NO_FLAGS, addr, false);
@@ -195,6 +211,7 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
memcpy(tt_local_entry->addr, addr, ETH_ALEN);
tt_local_entry->last_seen = jiffies;
+ atomic_set(&tt_local_entry->refcount, 2);
/* the batman interface mac address should never be purged */
if (compare_eth(addr, soft_iface->dev_addr))
@@ -204,30 +221,26 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr)
hash_add(bat_priv->tt_local_hash, compare_ltt, choose_orig,
tt_local_entry, &tt_local_entry->hash_entry);
+
atomic_inc(&bat_priv->num_local_tt);
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
/* remove address from global hash if present */
- spin_lock_bh(&bat_priv->tt_ghash_lock);
-
tt_global_entry = tt_global_hash_find(bat_priv, addr);
/* Check whether it is a roaming! */
if (tt_global_entry) {
- memcpy(roam_addr, tt_global_entry->addr, ETH_ALEN);
/* This node is probably going to update its tt table */
tt_global_entry->orig_node->tt_poss_change = true;
_tt_global_del(bat_priv, tt_global_entry,
"local tt received");
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
send_roam_adv(bat_priv, tt_global_entry->addr,
- tt_global_entry->orig_node);
- } else
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
-
- return;
-unlock:
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
+ tt_global_entry->orig_node);
+ }
+out:
+ if (tt_local_entry)
+ tt_local_entry_free_ref(tt_local_entry);
+ if (tt_global_entry)
+ tt_global_entry_free_ref(tt_global_entry);
}
int tt_changes_fill_buffer(struct bat_priv *bat_priv,
@@ -309,8 +322,6 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
"announced via TT (TTVN: %u):\n",
net_dev->name, (uint8_t)atomic_read(&bat_priv->ttvn));
- spin_lock_bh(&bat_priv->tt_lhash_lock);
-
buf_size = 1;
/* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */
for (i = 0; i < hash->size; i++) {
@@ -324,7 +335,6 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
buff = kmalloc(buf_size, GFP_ATOMIC);
if (!buff) {
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
ret = -ENOMEM;
goto out;
}
@@ -344,8 +354,6 @@ int tt_local_seq_print_text(struct seq_file *seq, void *offset)
rcu_read_unlock();
}
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
-
seq_printf(seq, "%s", buff);
kfree(buff);
out:
@@ -354,15 +362,6 @@ out:
return ret;
}
-static void tt_local_entry_free(struct hlist_node *node, void *arg)
-{
- struct bat_priv *bat_priv = arg;
- void *data = container_of(node, struct tt_local_entry, hash_entry);
-
- kfree(data);
- atomic_dec(&bat_priv->num_local_tt);
-}
-
static void tt_local_del(struct bat_priv *bat_priv,
struct tt_local_entry *tt_local_entry,
const char *message)
@@ -375,23 +374,24 @@ static void tt_local_del(struct bat_priv *bat_priv,
hash_remove(bat_priv->tt_local_hash, compare_ltt, choose_orig,
tt_local_entry->addr);
- tt_local_entry_free(&tt_local_entry->hash_entry, bat_priv);
+ tt_local_entry_free_ref(tt_local_entry);
}
void tt_local_remove(struct bat_priv *bat_priv, const uint8_t *addr,
const char *message, bool roaming)
{
- struct tt_local_entry *tt_local_entry;
+ struct tt_local_entry *tt_local_entry = NULL;
- spin_lock_bh(&bat_priv->tt_lhash_lock);
tt_local_entry = tt_local_hash_find(bat_priv, addr);
- if (tt_local_entry) {
- tt_local_event(bat_priv, TT_CHANGE_DEL, tt_local_entry->addr,
- roaming);
- tt_local_del(bat_priv, tt_local_entry, message);
- }
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
+ if (!tt_local_entry)
+ goto out;
+
+ tt_local_event(bat_priv, TT_CHANGE_DEL, tt_local_entry->addr, roaming);
+ tt_local_del(bat_priv, tt_local_entry, message);
+out:
+ if (tt_local_entry)
+ tt_local_entry_free_ref(tt_local_entry);
}
static void tt_local_purge(struct bat_priv *bat_priv)
@@ -400,40 +400,45 @@ static void tt_local_purge(struct bat_priv *bat_priv)
struct tt_local_entry *tt_local_entry;
struct hlist_node *node, *node_tmp;
struct hlist_head *head;
+ spinlock_t *list_lock; /* protects write access to the hash lists */
int i;
- spin_lock_bh(&bat_priv->tt_lhash_lock);
-
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
+ list_lock = &hash->list_locks[i];
+ spin_lock_bh(list_lock);
hlist_for_each_entry_safe(tt_local_entry, node, node_tmp,
head, hash_entry) {
if (tt_local_entry->never_purge)
continue;
if (!is_out_of_time(tt_local_entry->last_seen,
- TT_LOCAL_TIMEOUT * 1000))
+ TT_LOCAL_TIMEOUT * 1000))
continue;
tt_local_event(bat_priv, TT_CHANGE_DEL,
tt_local_entry->addr, false);
- tt_local_del(bat_priv, tt_local_entry,
- "address timed out");
+ atomic_dec(&bat_priv->num_local_tt);
+ bat_dbg(DBG_TT, bat_priv, "Deleting local "
+ "tt entry (%pM): timed out\n",
+ tt_local_entry->addr);
+ hlist_del_rcu(node);
+ tt_local_entry_free_ref(tt_local_entry);
}
+ spin_unlock_bh(list_lock);
}
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
}
static void tt_local_table_free(struct bat_priv *bat_priv)
{
struct hashtable_t *hash;
- int i;
spinlock_t *list_lock; /* protects write access to the hash lists */
- struct hlist_head *head;
- struct hlist_node *node, *node_tmp;
struct tt_local_entry *tt_local_entry;
+ struct hlist_node *node, *node_tmp;
+ struct hlist_head *head;
+ int i;
if (!bat_priv->tt_local_hash)
return;
@@ -448,7 +453,7 @@ static void tt_local_table_free(struct bat_priv *bat_priv)
hlist_for_each_entry_safe(tt_local_entry, node, node_tmp,
head, hash_entry) {
hlist_del_rcu(node);
- kfree(tt_local_entry);
+ tt_local_entry_free_ref(tt_local_entry);
}
spin_unlock_bh(list_lock);
}
@@ -492,10 +497,9 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
const unsigned char *tt_addr, uint8_t ttvn, bool roaming)
{
struct tt_global_entry *tt_global_entry;
- struct tt_local_entry *tt_local_entry;
struct orig_node *orig_node_tmp;
+ int ret = 0;
- spin_lock_bh(&bat_priv->tt_ghash_lock);
tt_global_entry = tt_global_hash_find(bat_priv, tt_addr);
if (!tt_global_entry) {
@@ -503,7 +507,8 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
kmalloc(sizeof(*tt_global_entry),
GFP_ATOMIC);
if (!tt_global_entry)
- goto unlock;
+ goto out;
+
memcpy(tt_global_entry->addr, tt_addr, ETH_ALEN);
/* Assign the new orig_node */
atomic_inc(&orig_node->refcount);
@@ -511,10 +516,12 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
tt_global_entry->ttvn = ttvn;
tt_global_entry->flags = NO_FLAGS;
tt_global_entry->roam_at = 0;
- atomic_inc(&orig_node->tt_size);
+ atomic_set(&tt_global_entry->refcount, 2);
+
hash_add(bat_priv->tt_global_hash, compare_gtt,
choose_orig, tt_global_entry,
&tt_global_entry->hash_entry);
+ atomic_inc(&orig_node->tt_size);
} else {
if (tt_global_entry->orig_node != orig_node) {
atomic_dec(&tt_global_entry->orig_node->tt_size);
@@ -529,25 +536,18 @@ int tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node,
tt_global_entry->roam_at = 0;
}
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
-
bat_dbg(DBG_TT, bat_priv,
"Creating new global tt entry: %pM (via %pM)\n",
tt_global_entry->addr, orig_node->orig);
/* remove address from local hash if present */
- spin_lock_bh(&bat_priv->tt_lhash_lock);
- tt_local_entry = tt_local_hash_find(bat_priv, tt_addr);
-
- if (tt_local_entry)
- tt_local_remove(bat_priv, tt_global_entry->addr,
- "global tt received", roaming);
-
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
- return 1;
-unlock:
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
- return 0;
+ tt_local_remove(bat_priv, tt_global_entry->addr,
+ "global tt received", roaming);
+ ret = 1;
+out:
+ if (tt_global_entry)
+ tt_global_entry_free_ref(tt_global_entry);
+ return ret;
}
int tt_global_seq_print_text(struct seq_file *seq, void *offset)
@@ -584,8 +584,6 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
seq_printf(seq, " %-13s %s %-15s %s\n",
"Client", "(TTVN)", "Originator", "(Curr TTVN)");
- spin_lock_bh(&bat_priv->tt_ghash_lock);
-
buf_size = 1;
/* Estimate length for: " * xx:xx:xx:xx:xx:xx (ttvn) via
* xx:xx:xx:xx:xx:xx (cur_ttvn)\n"*/
@@ -600,10 +598,10 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
buff = kmalloc(buf_size, GFP_ATOMIC);
if (!buff) {
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
ret = -ENOMEM;
goto out;
}
+
buff[0] = '\0';
pos = 0;
@@ -625,8 +623,6 @@ int tt_global_seq_print_text(struct seq_file *seq, void *offset)
rcu_read_unlock();
}
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
-
seq_printf(seq, "%s", buff);
kfree(buff);
out:
@@ -640,7 +636,7 @@ static void _tt_global_del(struct bat_priv *bat_priv,
const char *message)
{
if (!tt_global_entry)
- return;
+ goto out;
bat_dbg(DBG_TT, bat_priv,
"Deleting global tt entry %pM (via %pM): %s\n",
@@ -648,31 +644,35 @@ static void _tt_global_del(struct bat_priv *bat_priv,
message);
atomic_dec(&tt_global_entry->orig_node->tt_size);
+
hash_remove(bat_priv->tt_global_hash, compare_gtt, choose_orig,
tt_global_entry->addr);
- kfree(tt_global_entry);
+out:
+ if (tt_global_entry)
+ tt_global_entry_free_ref(tt_global_entry);
}
void tt_global_del(struct bat_priv *bat_priv,
struct orig_node *orig_node, const unsigned char *addr,
const char *message, bool roaming)
{
- struct tt_global_entry *tt_global_entry;
+ struct tt_global_entry *tt_global_entry = NULL;
- spin_lock_bh(&bat_priv->tt_ghash_lock);
tt_global_entry = tt_global_hash_find(bat_priv, addr);
+ if (!tt_global_entry)
+ goto out;
- if (tt_global_entry && tt_global_entry->orig_node == orig_node) {
+ if (tt_global_entry->orig_node == orig_node) {
if (roaming) {
tt_global_entry->flags |= TT_CLIENT_ROAM;
tt_global_entry->roam_at = jiffies;
goto out;
}
- atomic_dec(&orig_node->tt_size);
_tt_global_del(bat_priv, tt_global_entry, message);
}
out:
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
+ if (tt_global_entry)
+ tt_global_entry_free_ref(tt_global_entry);
}
void tt_global_del_orig(struct bat_priv *bat_priv,
@@ -683,30 +683,28 @@ void tt_global_del_orig(struct bat_priv *bat_priv,
struct hashtable_t *hash = bat_priv->tt_global_hash;
struct hlist_node *node, *safe;
struct hlist_head *head;
+ spinlock_t *list_lock; /* protects write access to the hash lists */
- if (!bat_priv->tt_global_hash)
- return;
-
- spin_lock_bh(&bat_priv->tt_ghash_lock);
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
+ list_lock = &hash->list_locks[i];
+ spin_lock_bh(list_lock);
hlist_for_each_entry_safe(tt_global_entry, node, safe,
head, hash_entry) {
- if (tt_global_entry->orig_node == orig_node)
- _tt_global_del(bat_priv, tt_global_entry,
- message);
+ if (tt_global_entry->orig_node == orig_node) {
+ bat_dbg(DBG_TT, bat_priv,
+ "Deleting global tt entry %pM "
+ "(via %pM): originator time out\n",
+ tt_global_entry->addr,
+ tt_global_entry->orig_node->orig);
+ hlist_del_rcu(node);
+ tt_global_entry_free_ref(tt_global_entry);
+ }
}
+ spin_unlock_bh(list_lock);
}
atomic_set(&orig_node->tt_size, 0);
-
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
-}
-
-static void tt_global_entry_free(struct hlist_node *node, void *arg)
-{
- void *data = container_of(node, struct tt_global_entry, hash_entry);
- kfree(data);
}
static void tt_global_roam_purge(struct bat_priv *bat_priv)
@@ -715,13 +713,14 @@ static void tt_global_roam_purge(struct bat_priv *bat_priv)
struct tt_global_entry *tt_global_entry;
struct hlist_node *node, *node_tmp;
struct hlist_head *head;
+ spinlock_t *list_lock; /* protects write access to the hash lists */
int i;
- spin_lock_bh(&bat_priv->tt_ghash_lock);
-
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
+ list_lock = &hash->list_locks[i];
+ spin_lock_bh(list_lock);
hlist_for_each_entry_safe(tt_global_entry, node, node_tmp,
head, hash_entry) {
if (!(tt_global_entry->flags & TT_CLIENT_ROAM))
@@ -730,20 +729,47 @@ static void tt_global_roam_purge(struct bat_priv *bat_priv)
TT_CLIENT_ROAM_TIMEOUT * 1000))
continue;
- _tt_global_del(bat_priv, tt_global_entry,
- "Roaming timeout");
+ bat_dbg(DBG_TT, bat_priv, "Deleting global "
+ "tt entry (%pM): Roaming timeout\n",
+ tt_global_entry->addr);
+ atomic_dec(&tt_global_entry->orig_node->tt_size);
+ hlist_del_rcu(node);
+ tt_global_entry_free_ref(tt_global_entry);
}
+ spin_unlock_bh(list_lock);
}
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
}
static void tt_global_table_free(struct bat_priv *bat_priv)
{
+ struct hashtable_t *hash;
+ spinlock_t *list_lock; /* protects write access to the hash lists */
+ struct tt_global_entry *tt_global_entry;
+ struct hlist_node *node, *node_tmp;
+ struct hlist_head *head;
+ int i;
+
if (!bat_priv->tt_global_hash)
return;
- hash_delete(bat_priv->tt_global_hash, tt_global_entry_free, NULL);
+ hash = bat_priv->tt_global_hash;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+ list_lock = &hash->list_locks[i];
+
+ spin_lock_bh(list_lock);
+ hlist_for_each_entry_safe(tt_global_entry, node, node_tmp,
+ head, hash_entry) {
+ hlist_del_rcu(node);
+ tt_global_entry_free_ref(tt_global_entry);
+ }
+ spin_unlock_bh(list_lock);
+ }
+
+ hash_destroy(hash);
+
bat_priv->tt_global_hash = NULL;
}
@@ -753,19 +779,19 @@ struct orig_node *transtable_search(struct bat_priv *bat_priv,
struct tt_global_entry *tt_global_entry;
struct orig_node *orig_node = NULL;
- spin_lock_bh(&bat_priv->tt_ghash_lock);
tt_global_entry = tt_global_hash_find(bat_priv, addr);
if (!tt_global_entry)
goto out;
if (!atomic_inc_not_zero(&tt_global_entry->orig_node->refcount))
- goto out;
+ goto free_tt;
orig_node = tt_global_entry->orig_node;
+free_tt:
+ tt_global_entry_free_ref(tt_global_entry);
out:
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
return orig_node;
}
@@ -828,7 +854,6 @@ uint16_t tt_local_crc(struct bat_priv *bat_priv)
tt_local_entry->addr[j]);
total ^= total_one;
}
-
rcu_read_unlock();
}
@@ -1371,15 +1396,17 @@ void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr)
{
- struct tt_local_entry *tt_local_entry;
+ struct tt_local_entry *tt_local_entry = NULL;
+ bool ret = false;
- spin_lock_bh(&bat_priv->tt_lhash_lock);
tt_local_entry = tt_local_hash_find(bat_priv, addr);
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
-
+ if (!tt_local_entry)
+ goto out;
+ ret = true;
+out:
if (tt_local_entry)
- return true;
- return false;
+ tt_local_entry_free_ref(tt_local_entry);
+ return ret;
}
void handle_tt_response(struct bat_priv *bat_priv,
@@ -1416,9 +1443,7 @@ void handle_tt_response(struct bat_priv *bat_priv,
spin_unlock_bh(&bat_priv->tt_req_list_lock);
/* Recalculate the CRC for this orig_node and store it */
- spin_lock_bh(&bat_priv->tt_ghash_lock);
orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
- spin_unlock_bh(&bat_priv->tt_ghash_lock);
/* Roaming phase is over: tables are in sync again. I can
* unset the flag */
orig_node->tt_poss_change = false;
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 9c84fa9..11e8569 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -184,8 +184,6 @@ struct bat_priv {
spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
spinlock_t forw_bcast_list_lock; /* protects */
spinlock_t tt_changes_list_lock; /* protects tt_changes */
- spinlock_t tt_lhash_lock; /* protects tt_local_hash */
- spinlock_t tt_ghash_lock; /* protects tt_global_hash */
spinlock_t tt_req_list_lock; /* protects tt_req_list */
spinlock_t tt_roam_list_lock; /* protects tt_roam_list */
spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
@@ -226,6 +224,8 @@ struct tt_local_entry {
uint8_t addr[ETH_ALEN];
unsigned long last_seen;
char never_purge;
+ atomic_t refcount;
+ struct rcu_head rcu;
struct hlist_node hash_entry;
};
@@ -235,6 +235,8 @@ struct tt_global_entry {
uint8_t ttvn;
uint8_t flags; /* only TT_GLOBAL_ROAM is used */
unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */
+ atomic_t refcount;
+ struct rcu_head rcu;
struct hlist_node hash_entry; /* entry in the global table */
};
diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
index 355c6e5..8a1b985 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -665,11 +665,12 @@ next:
hash = bat_priv->tt_local_hash;
- spin_lock_bh(&bat_priv->tt_lhash_lock);
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
- hlist_for_each_entry(tt_local_entry, node, head, hash_entry) {
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(tt_local_entry, node, head,
+ hash_entry) {
entry = (struct vis_info_entry *)
skb_put(info->skb_packet,
sizeof(*entry));
@@ -678,14 +679,12 @@ next:
entry->quality = 0; /* 0 means TT */
packet->entries++;
- if (vis_packet_full(info)) {
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
- return 0;
- }
+ if (vis_packet_full(info))
+ goto unlock;
}
+ rcu_read_unlock();
}
- spin_unlock_bh(&bat_priv->tt_lhash_lock);
return 0;
unlock:
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 09/12] batman-adv: add wrapper function to throw uevent in userspace
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (7 preceding siblings ...)
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 08/12] batman-adv: protect the local and the global trans-tables with rcu Sven Eckelmann
@ 2011-06-20 10:17 ` Sven Eckelmann
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 10/12] batman-adv: gateway election code refactoring Sven Eckelmann
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:17 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n
From: Antonio Quartulli <ordex@autistici.org>
Using throw_uevent() is now possible to trigger uevent signal that can
be recognised in userspace. Uevents will be triggered through the
/devices/virtual/net/{MESH_IFACE} kobject.
A triggered uevent has three properties:
- type: the event class. Who generates the event (only 'gw' is currently
defined). Corresponds to the BATTYPE uevent variable.
- action: the associated action with the event ('add'/'change'/'del' are
currently defined). Corresponds to the BATACTION uevent variable.
- data: any useful data for the userspace. Corresponds to the BATDATA
uevent variable.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/bat_sysfs.c | 71 ++++++++++++++++++++++++++++++++++++++++++++
net/batman-adv/bat_sysfs.h | 2 +
net/batman-adv/main.h | 11 +++++++
3 files changed, 84 insertions(+), 0 deletions(-)
diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index 63738ec..cd15deb 100644
--- a/net/batman-adv/bat_sysfs.c
+++ b/net/batman-adv/bat_sysfs.c
@@ -40,6 +40,20 @@ static struct bat_priv *kobj_to_batpriv(struct kobject *obj)
return netdev_priv(net_dev);
}
+#define UEV_TYPE_VAR "BATTYPE="
+#define UEV_ACTION_VAR "BATACTION="
+#define UEV_DATA_VAR "BATDATA="
+
+static char *uev_action_str[] = {
+ "add",
+ "del",
+ "change"
+};
+
+static char *uev_type_str[] = {
+ "gw"
+};
+
/* Use this, if you have customized show and store functions */
#define BAT_ATTR(_name, _mode, _show, _store) \
struct bat_attribute bat_attr_##_name = { \
@@ -601,3 +615,60 @@ void sysfs_del_hardif(struct kobject **hardif_obj)
kobject_put(*hardif_obj);
*hardif_obj = NULL;
}
+
+int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
+ enum uev_action action, const char *data)
+{
+ int ret = -1;
+ struct hard_iface *primary_if = NULL;
+ struct kobject *bat_kobj;
+ char *uevent_env[4] = { NULL, NULL, NULL, NULL };
+
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
+ bat_kobj = &primary_if->soft_iface->dev.kobj;
+
+ uevent_env[0] = kmalloc(strlen(UEV_TYPE_VAR) +
+ strlen(uev_type_str[type]) + 1,
+ GFP_ATOMIC);
+ if (!uevent_env[0])
+ goto out;
+
+ sprintf(uevent_env[0], "%s%s", UEV_TYPE_VAR, uev_type_str[type]);
+
+ uevent_env[1] = kmalloc(strlen(UEV_ACTION_VAR) +
+ strlen(uev_action_str[action]) + 1,
+ GFP_ATOMIC);
+ if (!uevent_env[1])
+ goto out;
+
+ sprintf(uevent_env[1], "%s%s", UEV_ACTION_VAR, uev_action_str[action]);
+
+ /* If the event is DEL, ignore the data field */
+ if (action != UEV_DEL) {
+ uevent_env[2] = kmalloc(strlen(UEV_DATA_VAR) +
+ strlen(data) + 1, GFP_ATOMIC);
+ if (!uevent_env[2])
+ goto out;
+
+ sprintf(uevent_env[2], "%s%s", UEV_DATA_VAR, data);
+ }
+
+ ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);
+out:
+ kfree(uevent_env[0]);
+ kfree(uevent_env[1]);
+ kfree(uevent_env[2]);
+
+ if (primary_if)
+ hardif_free_ref(primary_if);
+
+ if (ret)
+ bat_dbg(DBG_BATMAN, bat_priv, "Impossible to send "
+ "uevent for (%s,%s,%s) event (err: %d)\n",
+ uev_type_str[type], uev_action_str[action],
+ (action == UEV_DEL ? "NULL" : data), ret);
+ return ret;
+}
diff --git a/net/batman-adv/bat_sysfs.h b/net/batman-adv/bat_sysfs.h
index 02f1fa7..a3f75a7 100644
--- a/net/batman-adv/bat_sysfs.h
+++ b/net/batman-adv/bat_sysfs.h
@@ -38,5 +38,7 @@ int sysfs_add_meshif(struct net_device *dev);
void sysfs_del_meshif(struct net_device *dev);
int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev);
void sysfs_del_hardif(struct kobject **hardif_obj);
+int throw_uevent(struct bat_priv *bat_priv, enum uev_type type,
+ enum uev_action action, const char *data);
#endif /* _NET_BATMAN_ADV_SYSFS_H_ */
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 8eae05e..f9e0e17 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -91,6 +91,17 @@ enum mesh_state {
#define BCAST_QUEUE_LEN 256
#define BATMAN_QUEUE_LEN 256
+
+enum uev_action {
+ UEV_ADD = 0,
+ UEV_DEL,
+ UEV_CHANGE
+};
+
+enum uev_type {
+ UEV_GW = 0
+};
+
/*
* Debug Messages
*/
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 10/12] batman-adv: gateway election code refactoring
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (8 preceding siblings ...)
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 09/12] batman-adv: add wrapper function to throw uevent in userspace Sven Eckelmann
@ 2011-06-20 10:17 ` Sven Eckelmann
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 11/12] batman-adv: throw uevent in userspace on gateway add/change/del event Sven Eckelmann
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:17 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n, Marek Lindner
From: Antonio Quartulli <ordex@autistici.org>
The gateway election mechanism has been a little revised. Now the
gw_election is trigered by an atomic_t flag (gw_reselect) which is set
to 1 in case of election needed, avoding to set curr_gw to NULL.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/gateway_client.c | 142 +++++++++++++++++++++++----------------
net/batman-adv/main.c | 1 +
net/batman-adv/types.h | 1 +
3 files changed, 85 insertions(+), 59 deletions(-)
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 7248de2..0350c0c 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -20,6 +20,7 @@
*/
#include "main.h"
+#include "bat_sysfs.h"
#include "gateway_client.h"
#include "gateway_common.h"
#include "hard-interface.h"
@@ -97,40 +98,19 @@ static void gw_select(struct bat_priv *bat_priv, struct gw_node *new_gw_node)
void gw_deselect(struct bat_priv *bat_priv)
{
- gw_select(bat_priv, NULL);
+ atomic_set(&bat_priv->gw_reselect, 1);
}
-void gw_election(struct bat_priv *bat_priv)
+static struct gw_node *gw_get_best_gw_node(struct bat_priv *bat_priv)
{
- struct hlist_node *node;
- struct gw_node *gw_node, *curr_gw = NULL, *curr_gw_tmp = NULL;
struct neigh_node *router;
- uint8_t max_tq = 0;
+ struct hlist_node *node;
+ struct gw_node *gw_node, *curr_gw = NULL;
uint32_t max_gw_factor = 0, tmp_gw_factor = 0;
+ uint8_t max_tq = 0;
int down, up;
- /**
- * The batman daemon checks here if we already passed a full originator
- * cycle in order to make sure we don't choose the first gateway we
- * hear about. This check is based on the daemon's uptime which we
- * don't have.
- **/
- if (atomic_read(&bat_priv->gw_mode) != GW_MODE_CLIENT)
- return;
-
- curr_gw = gw_get_selected_gw_node(bat_priv);
- if (curr_gw)
- goto out;
-
rcu_read_lock();
- if (hlist_empty(&bat_priv->gw_list)) {
- bat_dbg(DBG_BATMAN, bat_priv,
- "Removing selected gateway - "
- "no gateway in range\n");
- gw_deselect(bat_priv);
- goto unlock;
- }
-
hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
if (gw_node->deleted)
continue;
@@ -139,6 +119,9 @@ void gw_election(struct bat_priv *bat_priv)
if (!router)
continue;
+ if (!atomic_inc_not_zero(&gw_node->refcount))
+ goto next;
+
switch (atomic_read(&bat_priv->gw_sel_class)) {
case 1: /* fast connection */
gw_bandwidth_to_kbit(gw_node->orig_node->gw_flags,
@@ -151,8 +134,12 @@ void gw_election(struct bat_priv *bat_priv)
if ((tmp_gw_factor > max_gw_factor) ||
((tmp_gw_factor == max_gw_factor) &&
- (router->tq_avg > max_tq)))
- curr_gw_tmp = gw_node;
+ (router->tq_avg > max_tq))) {
+ if (curr_gw)
+ gw_node_free_ref(curr_gw);
+ curr_gw = gw_node;
+ atomic_inc(&curr_gw->refcount);
+ }
break;
default: /**
@@ -163,8 +150,12 @@ void gw_election(struct bat_priv *bat_priv)
* soon as a better gateway appears which has
* $routing_class more tq points)
**/
- if (router->tq_avg > max_tq)
- curr_gw_tmp = gw_node;
+ if (router->tq_avg > max_tq) {
+ if (curr_gw)
+ gw_node_free_ref(curr_gw);
+ curr_gw = gw_node;
+ atomic_inc(&curr_gw->refcount);
+ }
break;
}
@@ -174,42 +165,75 @@ void gw_election(struct bat_priv *bat_priv)
if (tmp_gw_factor > max_gw_factor)
max_gw_factor = tmp_gw_factor;
- neigh_node_free_ref(router);
- }
-
- if (curr_gw != curr_gw_tmp) {
- router = orig_node_get_router(curr_gw_tmp->orig_node);
- if (!router)
- goto unlock;
-
- if ((curr_gw) && (!curr_gw_tmp))
- bat_dbg(DBG_BATMAN, bat_priv,
- "Removing selected gateway - "
- "no gateway in range\n");
- else if ((!curr_gw) && (curr_gw_tmp))
- bat_dbg(DBG_BATMAN, bat_priv,
- "Adding route to gateway %pM "
- "(gw_flags: %i, tq: %i)\n",
- curr_gw_tmp->orig_node->orig,
- curr_gw_tmp->orig_node->gw_flags,
- router->tq_avg);
- else
- bat_dbg(DBG_BATMAN, bat_priv,
- "Changing route to gateway %pM "
- "(gw_flags: %i, tq: %i)\n",
- curr_gw_tmp->orig_node->orig,
- curr_gw_tmp->orig_node->gw_flags,
- router->tq_avg);
+ gw_node_free_ref(gw_node);
+next:
neigh_node_free_ref(router);
- gw_select(bat_priv, curr_gw_tmp);
}
-
-unlock:
rcu_read_unlock();
+
+ return curr_gw;
+}
+
+void gw_election(struct bat_priv *bat_priv)
+{
+ struct gw_node *curr_gw = NULL, *next_gw = NULL;
+ struct neigh_node *router = NULL;
+
+ /**
+ * The batman daemon checks here if we already passed a full originator
+ * cycle in order to make sure we don't choose the first gateway we
+ * hear about. This check is based on the daemon's uptime which we
+ * don't have.
+ **/
+ if (atomic_read(&bat_priv->gw_mode) != GW_MODE_CLIENT)
+ goto out;
+
+ if (!atomic_dec_not_zero(&bat_priv->gw_reselect))
+ goto out;
+
+ curr_gw = gw_get_selected_gw_node(bat_priv);
+
+ next_gw = gw_get_best_gw_node(bat_priv);
+
+ if (curr_gw == next_gw)
+ goto out;
+
+ if (next_gw) {
+ router = orig_node_get_router(next_gw->orig_node);
+ if (!router) {
+ gw_deselect(bat_priv);
+ goto out;
+ }
+ }
+
+ if ((curr_gw) && (!next_gw)) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Removing selected gateway - no gateway in range\n");
+ } else if ((!curr_gw) && (next_gw)) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Adding route to gateway %pM (gw_flags: %i, tq: %i)\n",
+ next_gw->orig_node->orig,
+ next_gw->orig_node->gw_flags,
+ router->tq_avg);
+ } else {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Changing route to gateway %pM "
+ "(gw_flags: %i, tq: %i)\n",
+ next_gw->orig_node->orig,
+ next_gw->orig_node->gw_flags,
+ router->tq_avg);
+ }
+
+ gw_select(bat_priv, next_gw);
+
out:
if (curr_gw)
gw_node_free_ref(curr_gw);
+ if (next_gw)
+ gw_node_free_ref(next_gw);
+ if (router)
+ neigh_node_free_ref(router);
}
void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node)
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index c2b06b7..e367e69 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -113,6 +113,7 @@ int mesh_init(struct net_device *soft_iface)
if (vis_init(bat_priv) < 1)
goto err;
+ atomic_set(&bat_priv->gw_reselect, 0);
atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
goto end;
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 11e8569..85cf122 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -201,6 +201,7 @@ struct bat_priv {
struct delayed_work orig_work;
struct delayed_work vis_work;
struct gw_node __rcu *curr_gw; /* rcu protected pointer */
+ atomic_t gw_reselect;
struct hard_iface __rcu *primary_if; /* rcu protected pointer */
struct vis_info *my_vis_info;
};
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 11/12] batman-adv: throw uevent in userspace on gateway add/change/del event
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (9 preceding siblings ...)
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 10/12] batman-adv: gateway election code refactoring Sven Eckelmann
@ 2011-06-20 10:17 ` Sven Eckelmann
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 12/12] batman-adv: improved gateway tq-based selection Sven Eckelmann
2011-06-20 20:01 ` [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 David Miller
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:17 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n, Marek Lindner
From: Antonio Quartulli <ordex@autistici.org>
In case of new default gw, changing the default gw or deleting the default gw a
uevent is triggered with type=gw, action=add/change/del and
data={GW_ORIG_ADDRESS} (if any).
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/gateway_client.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 0350c0c..6381864 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -179,6 +179,7 @@ void gw_election(struct bat_priv *bat_priv)
{
struct gw_node *curr_gw = NULL, *next_gw = NULL;
struct neigh_node *router = NULL;
+ char gw_addr[18] = { '\0' };
/**
* The batman daemon checks here if we already passed a full originator
@@ -200,6 +201,8 @@ void gw_election(struct bat_priv *bat_priv)
goto out;
if (next_gw) {
+ sprintf(gw_addr, "%pM", next_gw->orig_node->orig);
+
router = orig_node_get_router(next_gw->orig_node);
if (!router) {
gw_deselect(bat_priv);
@@ -210,12 +213,14 @@ void gw_election(struct bat_priv *bat_priv)
if ((curr_gw) && (!next_gw)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Removing selected gateway - no gateway in range\n");
+ throw_uevent(bat_priv, UEV_GW, UEV_DEL, NULL);
} else if ((!curr_gw) && (next_gw)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Adding route to gateway %pM (gw_flags: %i, tq: %i)\n",
next_gw->orig_node->orig,
next_gw->orig_node->gw_flags,
router->tq_avg);
+ throw_uevent(bat_priv, UEV_GW, UEV_ADD, gw_addr);
} else {
bat_dbg(DBG_BATMAN, bat_priv,
"Changing route to gateway %pM "
@@ -223,6 +228,7 @@ void gw_election(struct bat_priv *bat_priv)
next_gw->orig_node->orig,
next_gw->orig_node->gw_flags,
router->tq_avg);
+ throw_uevent(bat_priv, UEV_GW, UEV_CHANGE, gw_addr);
}
gw_select(bat_priv, next_gw);
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* [B.A.T.M.A.N.] [PATCH 12/12] batman-adv: improved gateway tq-based selection
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (10 preceding siblings ...)
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 11/12] batman-adv: throw uevent in userspace on gateway add/change/del event Sven Eckelmann
@ 2011-06-20 10:17 ` Sven Eckelmann
2011-06-20 20:01 ` [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 David Miller
12 siblings, 0 replies; 14+ messages in thread
From: Sven Eckelmann @ 2011-06-20 10:17 UTC (permalink / raw)
To: davem; +Cc: netdev, b.a.t.m.a.n, Marek Lindner
From: Antonio Quartulli <ordex@autistici.org>
If a client issues a DHCPREQUEST for renewal, the packet is dropped
if the old destination (the old gateway for the client) TQ is smaller
than the current best gateway TQ less GW_THRESHOLD
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
net/batman-adv/gateway_client.c | 94 ++++++++++++++++++++++++++++++++++++++-
net/batman-adv/gateway_client.h | 3 +-
net/batman-adv/main.h | 3 +-
net/batman-adv/soft-interface.c | 10 +++-
4 files changed, 104 insertions(+), 6 deletions(-)
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 6381864..8b25b52 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -25,11 +25,17 @@
#include "gateway_common.h"
#include "hard-interface.h"
#include "originator.h"
+#include "routing.h"
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <linux/if_vlan.h>
+/* This is the offset of the options field in a dhcp packet starting at
+ * the beginning of the dhcp header */
+#define DHCP_OPTIONS_OFFSET 240
+#define DHCP_REQUEST 3
+
static void gw_node_free_ref(struct gw_node *gw_node)
{
if (atomic_dec_and_test(&gw_node->refcount))
@@ -509,14 +515,75 @@ out:
return ret;
}
-int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
+static bool is_type_dhcprequest(struct sk_buff *skb, int header_len)
+{
+ int ret = false;
+ unsigned char *p;
+ int pkt_len;
+
+ if (skb_linearize(skb) < 0)
+ goto out;
+
+ pkt_len = skb_headlen(skb);
+
+ if (pkt_len < header_len + DHCP_OPTIONS_OFFSET + 1)
+ goto out;
+
+ p = skb->data + header_len + DHCP_OPTIONS_OFFSET;
+ pkt_len -= header_len + DHCP_OPTIONS_OFFSET + 1;
+
+ /* Access the dhcp option lists. Each entry is made up by:
+ * - octect 1: option type
+ * - octect 2: option data len (only if type != 255 and 0)
+ * - octect 3: option data */
+ while (*p != 255 && !ret) {
+ /* p now points to the first octect: option type */
+ if (*p == 53) {
+ /* type 53 is the message type option.
+ * Jump the len octect and go to the data octect */
+ if (pkt_len < 2)
+ goto out;
+ p += 2;
+
+ /* check if the message type is what we need */
+ if (*p == DHCP_REQUEST)
+ ret = true;
+ break;
+ } else if (*p == 0) {
+ /* option type 0 (padding), just go forward */
+ if (pkt_len < 1)
+ goto out;
+ pkt_len--;
+ p++;
+ } else {
+ /* This is any other option. So we get the length... */
+ if (pkt_len < 1)
+ goto out;
+ pkt_len--;
+ p++;
+
+ /* ...and then we jump over the data */
+ if (pkt_len < *p)
+ goto out;
+ pkt_len -= *p;
+ p += (*p);
+ }
+ }
+out:
+ return ret;
+}
+
+int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb,
+ struct orig_node *old_gw)
{
struct ethhdr *ethhdr;
struct iphdr *iphdr;
struct ipv6hdr *ipv6hdr;
struct udphdr *udphdr;
struct gw_node *curr_gw;
+ struct neigh_node *neigh_curr = NULL, *neigh_old = NULL;
unsigned int header_len = 0;
+ int ret = 1;
if (atomic_read(&bat_priv->gw_mode) == GW_MODE_OFF)
return 0;
@@ -584,7 +651,30 @@ int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
if (!curr_gw)
return 0;
+ /* If old_gw != NULL then this packet is unicast.
+ * So, at this point we have to check the message type: if it is a
+ * DHCPREQUEST we have to decide whether to drop it or not */
+ if (old_gw && curr_gw->orig_node != old_gw) {
+ if (is_type_dhcprequest(skb, header_len)) {
+ /* If the dhcp packet has been sent to a different gw,
+ * we have to evaluate whether the old gw is still
+ * reliable enough */
+ neigh_curr = find_router(bat_priv, curr_gw->orig_node,
+ NULL);
+ neigh_old = find_router(bat_priv, old_gw, NULL);
+ if (!neigh_curr || !neigh_old)
+ goto free_neigh;
+ if (neigh_curr->tq_avg - neigh_old->tq_avg <
+ GW_THRESHOLD)
+ ret = -1;
+ }
+ }
+free_neigh:
+ if (neigh_old)
+ neigh_node_free_ref(neigh_old);
+ if (neigh_curr)
+ neigh_node_free_ref(neigh_curr);
if (curr_gw)
gw_node_free_ref(curr_gw);
- return 1;
+ return ret;
}
diff --git a/net/batman-adv/gateway_client.h b/net/batman-adv/gateway_client.h
index 1ce8c60..b9b983c 100644
--- a/net/batman-adv/gateway_client.h
+++ b/net/batman-adv/gateway_client.h
@@ -31,6 +31,7 @@ void gw_node_update(struct bat_priv *bat_priv,
void gw_node_delete(struct bat_priv *bat_priv, struct orig_node *orig_node);
void gw_node_purge(struct bat_priv *bat_priv);
int gw_client_seq_print_text(struct seq_file *seq, void *offset);
-int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb);
+int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb,
+ struct orig_node *old_gw);
#endif /* _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ */
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index f9e0e17..4f293b5 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -91,7 +91,6 @@ enum mesh_state {
#define BCAST_QUEUE_LEN 256
#define BATMAN_QUEUE_LEN 256
-
enum uev_action {
UEV_ADD = 0,
UEV_DEL,
@@ -102,6 +101,8 @@ enum uev_type {
UEV_GW = 0
};
+#define GW_THRESHOLD 50
+
/*
* Debug Messages
*/
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 3371ece..2dcdbb7 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -30,6 +30,7 @@
#include "gateway_common.h"
#include "gateway_client.h"
#include "bat_sysfs.h"
+#include "originator.h"
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
@@ -561,6 +562,7 @@ static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
struct bcast_packet *bcast_packet;
struct vlan_ethhdr *vhdr;
struct softif_neigh *curr_softif_neigh = NULL;
+ struct orig_node *orig_node = NULL;
int data_len = skb->len, ret;
short vid = -1;
bool do_bcast = false;
@@ -595,8 +597,10 @@ static int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
/* Register the client MAC in the transtable */
tt_local_add(soft_iface, ethhdr->h_source);
- if (is_multicast_ether_addr(ethhdr->h_dest)) {
- ret = gw_is_target(bat_priv, skb);
+ orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+ if (is_multicast_ether_addr(ethhdr->h_dest) ||
+ (orig_node && orig_node->gw_flags)) {
+ ret = gw_is_target(bat_priv, skb, orig_node);
if (ret < 0)
goto dropped;
@@ -656,6 +660,8 @@ end:
softif_neigh_free_ref(curr_softif_neigh);
if (primary_if)
hardif_free_ref(primary_if);
+ if (orig_node)
+ orig_node_free_ref(orig_node);
return NETDEV_TX_OK;
}
--
1.7.5.3
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20
2011-06-20 10:16 [B.A.T.M.A.N.] pull request: batman-adv 2011-06-20 Sven Eckelmann
` (11 preceding siblings ...)
2011-06-20 10:17 ` [B.A.T.M.A.N.] [PATCH 12/12] batman-adv: improved gateway tq-based selection Sven Eckelmann
@ 2011-06-20 20:01 ` David Miller
12 siblings, 0 replies; 14+ messages in thread
From: David Miller @ 2011-06-20 20:01 UTC (permalink / raw)
To: sven; +Cc: netdev, b.a.t.m.a.n
From: Sven Eckelmann <sven@narfation.org>
Date: Mon, 20 Jun 2011 12:16:53 +0200
> I would like to propose following changes for net-next-2.6/3.1. The
> first part (1-4) are only only small cleanup patches. The last 8 patches
> are related to Antonio Quartulli's research "Client announcement and
> Fast roaming in a Layer-2 mesh network". The technical report isn't
> published yet, but will hopefully follow soon. He tried to document all
> important parts in some (unofficial) documents [1,2,3].
Pulled, but you should seriously consider locking down the on-the-wire
protocol at some point and only make backward compatible changes to it
from that point forward.
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