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mac80211: allow drivers to set max MTU 

Make it possibly for drivers to adjust the default max_mtu
by storing it in the hardware struct and using that value
for all interfaces.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
Link: https://lore.kernel.org/r/1567738137-31748-1-git-send-email-wgong@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Wen Gong 2019-09-06 10:48:57 +08:00 committed by Johannes Berg
parent 24f6d765c8
commit 06354665f9
3 changed files with 5 additions and 1 deletions
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3
include/net/mac80211.h
View File

@ -2463,6 +2463,8 @@ enum ieee80211_hw_flags {
*
* @weight_multiplier: Driver specific airtime weight multiplier used while
* refilling deficit of each TXQ.
*
* @max_mtu: the max mtu could be set.
*/
struct ieee80211_hw {
struct ieee80211_conf conf;
@ -2500,6 +2502,7 @@ struct ieee80211_hw {
u8 max_nan_de_entries;
u8 tx_sk_pacing_shift;
u8 weight_multiplier;
u32 max_mtu;
};
static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw,

2
net/mac80211/iface.c
View File

@ -1876,7 +1876,7 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
/* MTU range: 256 - 2304 */
ndev->min_mtu = 256;
ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
ndev->max_mtu = local->hw.max_mtu;
ret = register_netdevice(ndev);
if (ret) {

1
net/mac80211/main.c
View File

@ -639,6 +639,7 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;