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authorAntonio Quartulli <antonio@open-mesh.com>2013-05-28 13:14:27 +0200
committerAntonio Quartulli <antonio@meshcoding.com>2013-10-12 17:17:11 +0200
commit298e6e685bbdacc781b64a94e0d215f78db5dc13 (patch)
tree7703698a0a2d72b09a358d07a9014a8d906a3602 /net
parent56a5ca8409072d9d982d0904f60a4a6096d2dec0 (diff)
downloadop-kernel-dev-298e6e685bbdacc781b64a94e0d215f78db5dc13.zip
op-kernel-dev-298e6e685bbdacc781b64a94e0d215f78db5dc13.tar.gz
batman-adv: implement batadv_tt_entries
Implement batadv_tt_entries() to get the number of entries fitting in a given amount of bytes. This computation is done several times in the code and therefore it is useful to have an helper function. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Diffstat (limited to 'net')
-rw-r--r--net/batman-adv/translation-table.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 34fa6cc..58636a7 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -232,6 +232,17 @@ static int batadv_tt_len(int changes_num)
return changes_num * sizeof(struct batadv_tvlv_tt_change);
}
+/**
+ * batadv_tt_entries - compute the number of entries fitting in tt_len bytes
+ * @tt_len: available space
+ *
+ * Returns the number of entries.
+ */
+static uint16_t batadv_tt_entries(uint16_t tt_len)
+{
+ return tt_len / batadv_tt_len(1);
+}
+
static int batadv_tt_local_init(struct batadv_priv *bat_priv)
{
if (bat_priv->tt.local_hash)
@@ -406,7 +417,7 @@ static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv)
if (tt_diff_len == 0)
goto container_register;
- tt_diff_entries_num = tt_diff_len / batadv_tt_len(1);
+ tt_diff_entries_num = batadv_tt_entries(tt_diff_len);
spin_lock_bh(&bat_priv->tt.changes_list_lock);
atomic_set(&bat_priv->tt.local_changes, 0);
@@ -1616,7 +1627,7 @@ batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
tt_len -= tt_len % sizeof(struct batadv_tvlv_tt_change);
}
- tt_tot = tt_len / sizeof(struct batadv_tvlv_tt_change);
+ tt_tot = batadv_tt_entries(tt_len);
tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len,
GFP_ATOMIC);
@@ -2567,7 +2578,7 @@ static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
tvlv_value_len -= sizeof(*tt_data);
- num_entries = tvlv_value_len / batadv_tt_len(1);
+ num_entries = batadv_tt_entries(tvlv_value_len);
batadv_tt_update_orig(bat_priv, orig,
(unsigned char *)(tt_data + 1),
@@ -2602,7 +2613,7 @@ static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
tvlv_value_len -= sizeof(*tt_data);
- num_entries = tvlv_value_len / batadv_tt_len(1);
+ num_entries = batadv_tt_entries(tvlv_value_len);
switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) {
case BATADV_TT_REQUEST:
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