Commit e3ffec48 authored by David S. Miller's avatar David S. Miller
Browse files

Merge tag 'batadv-net-for-davem-20180524' of git://git.open-mesh.org/linux-merge



Simon Wunderlich says:

====================
Here are some batman-adv bugfixes:

 - prevent hardif_put call with NULL parameter, by Colin Ian King

 - Avoid race in Translation Table allocator, by Sven Eckelmann

 - Fix Translation Table sync flags for intermediate Responses,
   by Linus Luessing

 - prevent sending inconsistent Translation Table TVLVs,
   by Marek Lindner
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 1383cb81 16116dac
......@@ -1536,7 +1536,7 @@ out:
if (!ret && primary_if)
*primary_if = hard_iface;
else
else if (hard_iface)
batadv_hardif_put(hard_iface);
return ret;
......
......@@ -862,7 +862,7 @@ batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
struct batadv_orig_node_vlan *vlan;
u8 *tt_change_ptr;
rcu_read_lock();
spin_lock_bh(&orig_node->vlan_list_lock);
hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
num_vlan++;
num_entries += atomic_read(&vlan->tt.num_entries);
......@@ -900,7 +900,7 @@ batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
*tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
out:
rcu_read_unlock();
spin_unlock_bh(&orig_node->vlan_list_lock);
return tvlv_len;
}
......@@ -931,15 +931,20 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
struct batadv_tvlv_tt_vlan_data *tt_vlan;
struct batadv_softif_vlan *vlan;
u16 num_vlan = 0;
u16 num_entries = 0;
u16 vlan_entries = 0;
u16 total_entries = 0;
u16 tvlv_len;
u8 *tt_change_ptr;
int change_offset;
rcu_read_lock();
spin_lock_bh(&bat_priv->softif_vlan_list_lock);
hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
vlan_entries = atomic_read(&vlan->tt.num_entries);
if (vlan_entries < 1)
continue;
num_vlan++;
num_entries += atomic_read(&vlan->tt.num_entries);
total_entries += vlan_entries;
}
change_offset = sizeof(**tt_data);
......@@ -947,7 +952,7 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
/* if tt_len is negative, allocate the space needed by the full table */
if (*tt_len < 0)
*tt_len = batadv_tt_len(num_entries);
*tt_len = batadv_tt_len(total_entries);
tvlv_len = *tt_len;
tvlv_len += change_offset;
......@@ -964,6 +969,10 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
vlan_entries = atomic_read(&vlan->tt.num_entries);
if (vlan_entries < 1)
continue;
tt_vlan->vid = htons(vlan->vid);
tt_vlan->crc = htonl(vlan->tt.crc);
......@@ -974,7 +983,7 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
*tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
out:
rcu_read_unlock();
spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
return tvlv_len;
}
......@@ -1538,6 +1547,8 @@ batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
* handled by a given originator
* @entry: the TT global entry to check
* @orig_node: the originator to search in the list
* @flags: a pointer to store TT flags for the given @entry received
* from @orig_node
*
* find out if an orig_node is already in the list of a tt_global_entry.
*
......@@ -1545,7 +1556,8 @@ batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
*/
static bool
batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
const struct batadv_orig_node *orig_node)
const struct batadv_orig_node *orig_node,
u8 *flags)
{
struct batadv_tt_orig_list_entry *orig_entry;
bool found = false;
......@@ -1553,6 +1565,10 @@ batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
if (orig_entry) {
found = true;
if (flags)
*flags = orig_entry->flags;
batadv_tt_orig_list_entry_put(orig_entry);
}
......@@ -1731,7 +1747,7 @@ static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
if (!(common->flags & BATADV_TT_CLIENT_TEMP))
goto out;
if (batadv_tt_global_entry_has_orig(tt_global_entry,
orig_node))
orig_node, NULL))
goto out_remove;
batadv_tt_global_del_orig_list(tt_global_entry);
goto add_orig_entry;
......@@ -2880,23 +2896,46 @@ unlock:
}
/**
* batadv_tt_local_valid() - verify that given tt entry is a valid one
* batadv_tt_local_valid() - verify local tt entry and get flags
* @entry_ptr: to be checked local tt entry
* @data_ptr: not used but definition required to satisfy the callback prototype
* @flags: a pointer to store TT flags for this client to
*
* Checks the validity of the given local TT entry. If it is, then the provided
* flags pointer is updated.
*
* Return: true if the entry is a valid, false otherwise.
*/
static bool batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr)
static bool batadv_tt_local_valid(const void *entry_ptr,
const void *data_ptr,
u8 *flags)
{
const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
return false;
if (flags)
*flags = tt_common_entry->flags;
return true;
}
/**
* batadv_tt_global_valid() - verify global tt entry and get flags
* @entry_ptr: to be checked global tt entry
* @data_ptr: an orig_node object (may be NULL)
* @flags: a pointer to store TT flags for this client to
*
* Checks the validity of the given global TT entry. If it is, then the provided
* flags pointer is updated either with the common (summed) TT flags if data_ptr
* is NULL or the specific, per originator TT flags otherwise.
*
* Return: true if the entry is a valid, false otherwise.
*/
static bool batadv_tt_global_valid(const void *entry_ptr,
const void *data_ptr)
const void *data_ptr,
u8 *flags)
{
const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
const struct batadv_tt_global_entry *tt_global_entry;
......@@ -2910,7 +2949,8 @@ static bool batadv_tt_global_valid(const void *entry_ptr,
struct batadv_tt_global_entry,
common);
return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node);
return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node,
flags);
}
/**
......@@ -2920,25 +2960,34 @@ static bool batadv_tt_global_valid(const void *entry_ptr,
* @hash: hash table containing the tt entries
* @tt_len: expected tvlv tt data buffer length in number of bytes
* @tvlv_buff: pointer to the buffer to fill with the TT data
* @valid_cb: function to filter tt change entries
* @valid_cb: function to filter tt change entries and to return TT flags
* @cb_data: data passed to the filter function as argument
*
* Fills the tvlv buff with the tt entries from the specified hash. If valid_cb
* is not provided then this becomes a no-op.
*/
static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
struct batadv_hashtable *hash,
void *tvlv_buff, u16 tt_len,
bool (*valid_cb)(const void *,
const void *),
const void *,
u8 *flags),
void *cb_data)
{
struct batadv_tt_common_entry *tt_common_entry;
struct batadv_tvlv_tt_change *tt_change;
struct hlist_head *head;
u16 tt_tot, tt_num_entries = 0;
u8 flags;
bool ret;
u32 i;
tt_tot = batadv_tt_entries(tt_len);
tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
if (!valid_cb)
return;
rcu_read_lock();
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
......@@ -2948,11 +2997,12 @@ static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
if (tt_tot == tt_num_entries)
break;
if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data)))
ret = valid_cb(tt_common_entry, cb_data, &flags);
if (!ret)
continue;
ether_addr_copy(tt_change->addr, tt_common_entry->addr);
tt_change->flags = tt_common_entry->flags;
tt_change->flags = flags;
tt_change->vid = htons(tt_common_entry->vid);
memset(tt_change->reserved, 0,
sizeof(tt_change->reserved));
......
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