diff options
| author | Antonio Quartulli <antonio@open-mesh.com> | 2013-05-28 13:14:27 +0200 |
|---|---|---|
| committer | Antonio Quartulli <antonio@meshcoding.com> | 2013-10-12 17:17:11 +0200 |
| commit | 298e6e685bbdacc781b64a94e0d215f78db5dc13 (patch) | |
| tree | 7703698a0a2d72b09a358d07a9014a8d906a3602 /net/batman-adv/translation-table.c | |
| parent | 56a5ca8409072d9d982d0904f60a4a6096d2dec0 (diff) | |
| download | lwn-298e6e685bbdacc781b64a94e0d215f78db5dc13.tar.gz lwn-298e6e685bbdacc781b64a94e0d215f78db5dc13.zip | |
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/batman-adv/translation-table.c')
| -rw-r--r-- | net/batman-adv/translation-table.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 34fa6cc381c9..58636a77de79 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: |