From 508c423d9444a5eeeebd66fcff19ebe346a05150 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 28 Feb 2024 09:48:13 +0100 Subject: wifi: mac80211: simplify multi-link element parsing We shouldn't assign elems->ml_basic{,len} before defragmentation, and we don't need elems->ml_reconf{,len} at all since we don't do defragmentation. Clean that up a bit. This does require always defragmention even when it may not be needed, but that's easier to reason about. Reviewed-by: Ilan Peer Reviewed-by: Miriam Rachel Korenblit Link: https://msgid.link/20240228094902.e0115da4d2a6.I89a80f7387eabef8df3955485d4a583ed024c5b1@changeid Signed-off-by: Johannes Berg --- net/mac80211/ieee80211_i.h | 6 ++---- net/mac80211/mlme.c | 6 ++---- net/mac80211/parse.c | 12 ++++-------- 3 files changed, 8 insertions(+), 16 deletions(-) (limited to 'net/mac80211') diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 32b5ac8947bd..26cf24a31583 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1736,7 +1736,6 @@ struct ieee802_11_elems { const struct ieee80211_eht_cap_elem *eht_cap; const struct ieee80211_eht_operation *eht_operation; const struct ieee80211_multi_link_elem *ml_basic; - const struct ieee80211_multi_link_elem *ml_reconf; const struct ieee80211_bandwidth_indication *bandwidth_indication; const struct ieee80211_ttlm_elem *ttlm[IEEE80211_TTLM_MAX_CNT]; @@ -1764,12 +1763,11 @@ struct ieee802_11_elems { /* mult-link element can be de-fragmented and thus u8 is not sufficient */ size_t ml_basic_len; - size_t ml_reconf_len; - /* The basic Multi-Link element in the original IEs */ + /* The basic Multi-Link element in the original elements */ const struct element *ml_basic_elem; - /* The reconfiguration Multi-Link element in the original IEs */ + /* The reconfiguration Multi-Link element in the original elements */ const struct element *ml_reconf_elem; u8 ttlm_num; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 2c72d4d0fc25..3be4f4cf12c3 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -5760,7 +5760,7 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, u8 link_id; u32 delay; - if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) + if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf_elem) return; ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, @@ -5773,9 +5773,7 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, if (ml_len < 0) return; - elems->ml_reconf = (const void *)elems->scratch_pos; - elems->ml_reconf_len = ml_len; - ml = elems->ml_reconf; + ml = (const void *)elems->scratch_pos; /* Directly parse the sub elements as the common information doesn't * hold any useful information. diff --git a/net/mac80211/parse.c b/net/mac80211/parse.c index d231aaecc219..8bdf6e7efa58 100644 --- a/net/mac80211/parse.c +++ b/net/mac80211/parse.c @@ -129,19 +129,15 @@ ieee80211_parse_extension_element(u32 *crc, switch (le16_get_bits(mle->control, IEEE80211_ML_CONTROL_TYPE)) { case IEEE80211_ML_CONTROL_TYPE_BASIC: - if (elems->ml_basic) { + if (elems->ml_basic_elem) { elems->parse_error |= IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC; break; } elems->ml_basic_elem = (void *)elem; - elems->ml_basic = data; - elems->ml_basic_len = len; break; case IEEE80211_ML_CONTROL_TYPE_RECONF: elems->ml_reconf_elem = (void *)elem; - elems->ml_reconf = data; - elems->ml_reconf_len = len; break; default: break; @@ -776,9 +772,6 @@ static void ieee80211_mle_parse_link(struct ieee802_11_elems *elems, const struct element *non_inherit = NULL; const u8 *end; - if (params->link_id == -1) - return; - ml_len = cfg80211_defragment_element(elems->ml_basic_elem, elems->ie_start, elems->total_len, @@ -795,6 +788,9 @@ static void ieee80211_mle_parse_link(struct ieee802_11_elems *elems, elems->ml_basic_len = ml_len; elems->scratch_pos += ml_len; + if (params->link_id == -1) + return; + ieee80211_mle_get_sta_prof(elems, params->link_id); prof = elems->prof; -- cgit