From e227300c8395dffaa7614ce7c7666a82180ebc60 Mon Sep 17 00:00:00 2001 From: Purushottam Kushwaha Date: Wed, 12 Oct 2016 18:25:35 +0530 Subject: [PATCH] cfg80211: pass struct to interface combination check/iter Move the growing parameter list to a structure for the interface combination check and iteration functions in cfg80211 and mac80211 to make the code easier to understand. Signed-off-by: Purushottam Kushwaha [edit commit message] Signed-off-by: Johannes Berg --- .../broadcom/brcm80211/brcmfmac/cfg80211.c | 22 ++++++----- include/net/cfg80211.h | 46 +++++++++++----------- net/mac80211/util.c | 44 ++++++++++----------- net/wireless/util.c | 28 ++++++------- 4 files changed, 68 insertions(+), 72 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c index b777e1b..2295336 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c @@ -414,23 +414,24 @@ static int brcmf_vif_change_validate(struct brcmf_cfg80211_info *cfg, struct brcmf_cfg80211_vif *vif, enum nl80211_iftype new_type) { - int iftype_num[NUM_NL80211_IFTYPES]; struct brcmf_cfg80211_vif *pos; bool check_combos = false; int ret = 0; + struct iface_combination_params params = { + .num_different_channels = 1, + }; - memset(&iftype_num[0], 0, sizeof(iftype_num)); list_for_each_entry(pos, &cfg->vif_list, list) if (pos == vif) { - iftype_num[new_type]++; + params.iftype_num[new_type]++; } else { /* concurrent interfaces so need check combinations */ check_combos = true; - iftype_num[pos->wdev.iftype]++; + params.iftype_num[pos->wdev.iftype]++; } if (check_combos) - ret = cfg80211_check_combinations(cfg->wiphy, 1, 0, iftype_num); + ret = cfg80211_check_combinations(cfg->wiphy, ¶ms); return ret; } @@ -438,15 +439,16 @@ static int brcmf_vif_change_validate(struct brcmf_cfg80211_info *cfg, static int brcmf_vif_add_validate(struct brcmf_cfg80211_info *cfg, enum nl80211_iftype new_type) { - int iftype_num[NUM_NL80211_IFTYPES]; struct brcmf_cfg80211_vif *pos; + struct iface_combination_params params = { + .num_different_channels = 1, + }; - memset(&iftype_num[0], 0, sizeof(iftype_num)); list_for_each_entry(pos, &cfg->vif_list, list) - iftype_num[pos->wdev.iftype]++; + params.iftype_num[pos->wdev.iftype]++; - iftype_num[new_type]++; - return cfg80211_check_combinations(cfg->wiphy, 1, 0, iftype_num); + params.iftype_num[new_type]++; + return cfg80211_check_combinations(cfg->wiphy, ¶ms); } static void convert_key_from_CPU(struct brcmf_wsec_key *key, diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index fe78f02..ea10854 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -772,6 +772,26 @@ struct cfg80211_csa_settings { }; /** + * struct iface_combination_params - input parameters for interface combinations + * + * Used to pass interface combination parameters + * + * @num_different_channels: the number of different channels we want + * to use for verification + * @radar_detect: a bitmap where each bit corresponds to a channel + * width where radar detection is needed, as in the definition of + * &struct ieee80211_iface_combination.@radar_detect_widths + * @iftype_num: array with the number of interfaces of each interface + * type. The index is the interface type as specified in &enum + * nl80211_iftype. + */ +struct iface_combination_params { + int num_different_channels; + u8 radar_detect; + int iftype_num[NUM_NL80211_IFTYPES]; +}; + +/** * enum station_parameters_apply_mask - station parameter values to apply * @STATION_PARAM_APPLY_UAPSD: apply new uAPSD parameters (uapsd_queues, max_sp) * @STATION_PARAM_APPLY_CAPABILITY: apply new capability @@ -5575,36 +5595,20 @@ unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy); * cfg80211_check_combinations - check interface combinations * * @wiphy: the wiphy - * @num_different_channels: the number of different channels we want - * to use for verification - * @radar_detect: a bitmap where each bit corresponds to a channel - * width where radar detection is needed, as in the definition of - * &struct ieee80211_iface_combination.@radar_detect_widths - * @iftype_num: array with the numbers of interfaces of each interface - * type. The index is the interface type as specified in &enum - * nl80211_iftype. + * @params: the interface combinations parameter * * This function can be called by the driver to check whether a * combination of interfaces and their types are allowed according to * the interface combinations. */ int cfg80211_check_combinations(struct wiphy *wiphy, - const int num_different_channels, - const u8 radar_detect, - const int iftype_num[NUM_NL80211_IFTYPES]); + struct iface_combination_params *params); /** * cfg80211_iter_combinations - iterate over matching combinations * * @wiphy: the wiphy - * @num_different_channels: the number of different channels we want - * to use for verification - * @radar_detect: a bitmap where each bit corresponds to a channel - * width where radar detection is needed, as in the definition of - * &struct ieee80211_iface_combination.@radar_detect_widths - * @iftype_num: array with the numbers of interfaces of each interface - * type. The index is the interface type as specified in &enum - * nl80211_iftype. + * @params: the interface combinations parameter * @iter: function to call for each matching combination * @data: pointer to pass to iter function * @@ -5613,9 +5617,7 @@ int cfg80211_check_combinations(struct wiphy *wiphy, * purposes. */ int cfg80211_iter_combinations(struct wiphy *wiphy, - const int num_different_channels, - const u8 radar_detect, - const int iftype_num[NUM_NL80211_IFTYPES], + struct iface_combination_params *params, void (*iter)(const struct ieee80211_iface_combination *c, void *data), void *data); diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 545c79a..031273a 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -3308,10 +3308,11 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, struct ieee80211_local *local = sdata->local; struct ieee80211_sub_if_data *sdata_iter; enum nl80211_iftype iftype = sdata->wdev.iftype; - int num[NUM_NL80211_IFTYPES]; struct ieee80211_chanctx *ctx; - int num_different_channels = 0; int total = 1; + struct iface_combination_params params = { + .radar_detect = radar_detect, + }; lockdep_assert_held(&local->chanctx_mtx); @@ -3322,9 +3323,6 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, !chandef->chan)) return -EINVAL; - if (chandef) - num_different_channels = 1; - if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) return -EINVAL; @@ -3335,24 +3333,26 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, return 0; } - memset(num, 0, sizeof(num)); + if (chandef) + params.num_different_channels = 1; if (iftype != NL80211_IFTYPE_UNSPECIFIED) - num[iftype] = 1; + params.iftype_num[iftype] = 1; list_for_each_entry(ctx, &local->chanctx_list, list) { if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) continue; - radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); + params.radar_detect |= + ieee80211_chanctx_radar_detect(local, ctx); if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { - num_different_channels++; + params.num_different_channels++; continue; } if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && cfg80211_chandef_compatible(chandef, &ctx->conf.def)) continue; - num_different_channels++; + params.num_different_channels++; } list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { @@ -3365,16 +3365,14 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) continue; - num[wdev_iter->iftype]++; + params.iftype_num[wdev_iter->iftype]++; total++; } - if (total == 1 && !radar_detect) + if (total == 1 && !params.radar_detect) return 0; - return cfg80211_check_combinations(local->hw.wiphy, - num_different_channels, - radar_detect, num); + return cfg80211_check_combinations(local->hw.wiphy, ¶ms); } static void @@ -3390,12 +3388,10 @@ ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, int ieee80211_max_num_channels(struct ieee80211_local *local) { struct ieee80211_sub_if_data *sdata; - int num[NUM_NL80211_IFTYPES] = {}; struct ieee80211_chanctx *ctx; - int num_different_channels = 0; - u8 radar_detect = 0; u32 max_num_different_channels = 1; int err; + struct iface_combination_params params = {0}; lockdep_assert_held(&local->chanctx_mtx); @@ -3403,17 +3399,17 @@ int ieee80211_max_num_channels(struct ieee80211_local *local) if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) continue; - num_different_channels++; + params.num_different_channels++; - radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); + params.radar_detect |= + ieee80211_chanctx_radar_detect(local, ctx); } list_for_each_entry_rcu(sdata, &local->interfaces, list) - num[sdata->wdev.iftype]++; + params.iftype_num[sdata->wdev.iftype]++; - err = cfg80211_iter_combinations(local->hw.wiphy, - num_different_channels, radar_detect, - num, ieee80211_iter_max_chans, + err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, + ieee80211_iter_max_chans, &max_num_different_channels); if (err < 0) return err; diff --git a/net/wireless/util.c b/net/wireless/util.c index 8edce22..0d69b25 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1580,9 +1580,7 @@ int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, } int cfg80211_iter_combinations(struct wiphy *wiphy, - const int num_different_channels, - const u8 radar_detect, - const int iftype_num[NUM_NL80211_IFTYPES], + struct iface_combination_params *params, void (*iter)(const struct ieee80211_iface_combination *c, void *data), void *data) @@ -1593,7 +1591,7 @@ int cfg80211_iter_combinations(struct wiphy *wiphy, int num_interfaces = 0; u32 used_iftypes = 0; - if (radar_detect) { + if (params->radar_detect) { rcu_read_lock(); regdom = rcu_dereference(cfg80211_regdomain); if (regdom) @@ -1602,8 +1600,8 @@ int cfg80211_iter_combinations(struct wiphy *wiphy, } for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { - num_interfaces += iftype_num[iftype]; - if (iftype_num[iftype] > 0 && + num_interfaces += params->iftype_num[iftype]; + if (params->iftype_num[iftype] > 0 && !(wiphy->software_iftypes & BIT(iftype))) used_iftypes |= BIT(iftype); } @@ -1617,7 +1615,7 @@ int cfg80211_iter_combinations(struct wiphy *wiphy, if (num_interfaces > c->max_interfaces) continue; - if (num_different_channels > c->num_different_channels) + if (params->num_different_channels > c->num_different_channels) continue; limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, @@ -1632,16 +1630,17 @@ int cfg80211_iter_combinations(struct wiphy *wiphy, all_iftypes |= limits[j].types; if (!(limits[j].types & BIT(iftype))) continue; - if (limits[j].max < iftype_num[iftype]) + if (limits[j].max < params->iftype_num[iftype]) goto cont; - limits[j].max -= iftype_num[iftype]; + limits[j].max -= params->iftype_num[iftype]; } } - if (radar_detect != (c->radar_detect_widths & radar_detect)) + if (params->radar_detect != + (c->radar_detect_widths & params->radar_detect)) goto cont; - if (radar_detect && c->radar_detect_regions && + if (params->radar_detect && c->radar_detect_regions && !(c->radar_detect_regions & BIT(region))) goto cont; @@ -1675,14 +1674,11 @@ cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, } int cfg80211_check_combinations(struct wiphy *wiphy, - const int num_different_channels, - const u8 radar_detect, - const int iftype_num[NUM_NL80211_IFTYPES]) + struct iface_combination_params *params) { int err, num = 0; - err = cfg80211_iter_combinations(wiphy, num_different_channels, - radar_detect, iftype_num, + err = cfg80211_iter_combinations(wiphy, params, cfg80211_iter_sum_ifcombs, &num); if (err) return err; -- 2.7.4