On Tuesday 19 June 2012 20:26:30 Sven Eckelmann wrote:

Signed-off-by: Sven Eckelmann sven@narfation.org

ordex: This one is important for you. Please check whether patches in batman-adv/next touch these code parts. They may be the reason that these problems were introduced and must be fixed. Therefore, I would suggest to put this patch directly (after reviewing of course) in next.

bat_iv_ogm.c | 2 +- compat.h | 4 ++-- debugfs.c | 18 +++++++++++------- gateway_client.c | 4 ++-- hard-interface.c | 10 +++++----- originator.c | 9 +++++---- routing.c | 3 +-- sysfs.c | 2 +- unicast.c | 5 +++-- 9 files changed, 31 insertions(+), 26 deletions(-)

diff --git a/bat_iv_ogm.c b/bat_iv_ogm.c index 1dfe0e4..e877af8 100644 --- a/bat_iv_ogm.c +++ b/bat_iv_ogm.c @@ -145,7 +145,7 @@ static uint8_t batadv_hop_penalty(uint8_t tq,

/* is there another aggregated packet here? */ static int batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len,

• 		  int tt_num_changes)
  

• 		     int tt_num_changes)
  

{ int next_buff_pos = 0;

This is a regression in 126772e16e6f337a1ae626fba5cdaf8dfd12f46b (rename patches)

diff --git a/compat.h b/compat.h index d58ba17..13253dd 100644 --- a/compat.h +++ b/compat.h @@ -72,8 +72,8 @@

#define __hlist_for_each_rcu(pos, head) \ for (pos = rcu_dereference(hlist_first_rcu(head)); \

• pos && ({ prefetch(pos->next); 1; }); \
• pos = rcu_dereference(hlist_next_rcu(pos)))

•     pos && ({ prefetch(pos->next); 1; }); \
  

•     pos = rcu_dereference(hlist_next_rcu(pos)))
  
  

#define rcu_dereference_protected(p, c) (p)

There since 4c4236064501e85915087f00a370df8d9f43028d (there since ages)

diff --git a/debugfs.c b/debugfs.c index e45cf0e..34fbb16 100644 --- a/debugfs.c +++ b/debugfs.c @@ -111,6 +111,11 @@ static int batadv_log_release(struct inode *inode, struct file *file) return 0; }

+static int batadv_log_empty(struct batadv_debug_log *debug_log) +{

• return !(debug_log->log_start - debug_log->log_end);

+}

static ssize_t batadv_log_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { @@ -120,8 +125,7 @@ static ssize_t batadv_log_read(struct file *file, char __user *buf, char *char_addr; char c;

• if ((file->f_flags & O_NONBLOCK) &&

•    !(debug_log->log_end - debug_log->log_start))
  

• if ((file->f_flags & O_NONBLOCK) && batadv_log_empty(debug_log)) return -EAGAIN;

  if (!buf)

@@ -134,7 +138,7 @@ static ssize_t batadv_log_read(struct file *file, char __user *buf, return -EFAULT;

error = wait_event_interruptible(debug_log->queue_wait,

• 		(debug_log->log_start - debug_log->log_end));
  

• 			 (!batadv_log_empty(debug_log)));
  
  

  if (error) return error;

@@ -175,7 +179,7 @@ static unsigned int batadv_log_poll(struct file *file, poll_table *wait)

poll_wait(file, &debug_log->queue_wait, wait);

• if (debug_log->log_end - debug_log->log_start)

• if (!batadv_log_empty(debug_log)) return POLLIN | POLLRDNORM;

  return 0;

@@ -370,9 +374,9 @@ int batadv_debugfs_add_meshif(struct net_device *dev)

for (bat_debug = batadv_mesh_debuginfos; *bat_debug; ++bat_debug) { file = debugfs_create_file(((*bat_debug)->attr).name,

• 			  S_IFREG | ((*bat_debug)->attr).mode,
  

• 			  bat_priv->debug_dir,
  

• 			  dev, &(*bat_debug)->fops);
  

• 			   S_IFREG | ((*bat_debug)->attr).mode,
  

• 			   bat_priv->debug_dir,
  

• 			   dev, &(*bat_debug)->fops);
  

  if (!file) { batadv_err(dev, "Can't add debugfs file: %s/%s\n", dev->name, ((*bat_debug)->attr).name);

Problem been there since 24571be14371a3750ab04bddee85fa53c57a9b34 (the beginning of the debug log code)

diff --git a/gateway_client.c b/gateway_client.c index 6fe5cc8..b421cc4 100644 --- a/gateway_client.c +++ b/gateway_client.c @@ -228,8 +228,8 @@ void batadv_gw_election(struct batadv_priv *bat_priv) } else if ((!curr_gw) && (next_gw)) { batadv_dbg(BATADV_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);
  

• 	   next_gw->orig_node->orig,
  

• 	   next_gw->orig_node->gw_flags, router->tq_avg);
  

  batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_ADD, gw_addr); } else {

Regression in 033ae41f1ef4eac0ae20efe1b9d0017cc76815a8 (rename patches).

diff --git a/hard-interface.c b/hard-interface.c index 14e17ea..282bf6e 100644 --- a/hard-interface.c +++ b/hard-interface.c @@ -324,15 +324,15 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, batadv_info(hard_iface->soft_iface, "Adding interface: %s\n", hard_iface->net_dev->name);

• if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu <

• ETH_DATA_LEN + BATADV_HEADER_LEN)
  

• if (atomic_read(&bat_priv->fragmentation) &&

•    hard_iface->net_dev->mtu < ETH_DATA_LEN + BATADV_HEADER_LEN)
  

  batadv_info(hard_iface->soft_iface, "The MTU of interface %s is too small (%i) to handle the

transport

of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to %zi would solve the problem.\n", hard_iface->net_dev->name, hard_iface->net_dev->mtu, ETH_DATA_LEN + BATADV_HEADER_LEN);

• if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu <

• ETH_DATA_LEN + BATADV_HEADER_LEN)
  

• if (!atomic_read(&bat_priv->fragmentation) &&

•    hard_iface->net_dev->mtu < ETH_DATA_LEN + BATADV_HEADER_LEN)
  

  batadv_info(hard_iface->soft_iface, "The MTU of interface %s is too small (%i) to handle the

transport

of batman-adv packets. If you experience problems getting traffic through try increasing the MTU to %zi.\n", hard_iface->net_dev->name, hard_iface->net_dev->mtu, @@ -486,7 +486,7 @@ void batadv_hardif_remove_interfaces(void) }

Regression in 9de347143505f27ef096d883aa0fcf540ffffe5a (from the stone age of unicast fragmentation)

static int batadv_hard_if_event(struct notifier_block *this,

• 	 unsigned long event, void *ptr)
  

• 		unsigned long event, void *ptr)
  

{ struct net_device *net_dev = ptr; struct batadv_hard_iface *hard_iface;

Regression 5615c4685c88730627a8bea8988d2f8bfe0403be (renaming patches)

diff --git a/originator.c b/originator.c index fc1ce26..ac9bdf8 100644 --- a/originator.c +++ b/originator.c @@ -413,6 +413,7 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) int batman_count = 0; int last_seen_secs; int last_seen_msecs;

• unsigned long last_seen_jiffies; uint32_t i; int ret = 0;

@@ -451,10 +452,10 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) if (neigh_node->tq_avg == 0) goto next;

• 	last_seen_secs = jiffies_to_msecs(jiffies -
  

• 				orig_node->last_seen) / 1000;
  

• 	last_seen_msecs = jiffies_to_msecs(jiffies -
  

• 				orig_node->last_seen) % 1000;
  

• 	last_seen_jiffies = jiffies - orig_node->last_seen;
  

• 	last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
  

• 	last_seen_secs = last_seen_msecs / 1000;
  

• 	last_seen_msecs = last_seen_msecs % 1000;
  
  seq_printf(seq, "%pM %4i.%03is   (%3i) %pM [%10s]:",
  	   orig_node->orig, last_seen_secs,
  

Regression in 60dc71980e40e5ee8ee2c67523aaf8f3479dec55 (so old that we have to invent a name for this period of time)

diff --git a/routing.c b/routing.c index b79e42e..bc2b88b 100644 --- a/routing.c +++ b/routing.c @@ -969,8 +969,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv, ETH_HLEN) < 0) return 0;

• ethhdr = (struct ethhdr *)(skb->data +
  

• 	sizeof(struct batadv_unicast_packet));
  

• ethhdr = (struct ethhdr *)(skb->data + sizeof(*unicast_packet));
  
  

  /* we don't have an updated route for this client, so we should

  • not try to reroute the packet!!

Regression in cea194d90b11aff7fc289149e4c7f305fad3535a (when tt was introduced)

diff --git a/sysfs.c b/sysfs.c index 6d519ee..66518c7 100644 --- a/sysfs.c +++ b/sysfs.c @@ -119,7 +119,7 @@ ssize_t batadv_show_##_name(struct kobject *kobj, \ static BATADV_ATTR_SIF_STORE_UINT(_name, _min, _max, _post_func)\ static BATADV_ATTR_SIF_SHOW_UINT(_name) \ static BATADV_ATTR(_name, _mode, batadv_show_##_name, \

• 	batadv_store_##_name)
  

• 	   batadv_store_##_name)
  
  
  

#define BATADV_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func) \

Regression in 44e4434de21340e5a973f850ddfc90bd67800b34 (rename patches)

diff --git a/unicast.c b/unicast.c index c42b81d..0016464 100644 --- a/unicast.c +++ b/unicast.c @@ -296,6 +296,7 @@ int batadv_unicast_send_skb(struct sk_buff *skb, struct batadv_priv *bat_priv) struct batadv_neigh_node *neigh_node; int data_len = skb->len; int ret = 1;

• unsigned int dev_mtu;

  /* get routing information */ if (is_multicast_ether_addr(ethhdr->h_dest)) {

@@ -344,9 +345,9 @@ find_router: if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest)) unicast_packet->ttvn = unicast_packet->ttvn - 1;

• dev_mtu = neigh_node->if_incoming->net_dev->mtu; if (atomic_read(&bat_priv->fragmentation) &&

•    data_len + sizeof(*unicast_packet) >
  

• 		neigh_node->if_incoming->net_dev->mtu) {
  

•    data_len + sizeof(*unicast_packet) > dev_mtu) {
  

  /* send frag skb decreases ttl */ unicast_packet->header.ttl++; ret = batadv_frag_send_skb(skb, bat_priv,

Regression introduced in a10b9aa90937448096b509504afe4feed289c25a (fragmentation patches)

Please let me know which part should be placed in a separate patch.

Kind regards, Sven