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wifi: mac80211: simplify multi-link element parsing

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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 <ilan.peer@intel.com>
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240228094902.e0115da4d2a6.I89a80f7387eabef8df3955485d4a583ed024c5b1@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2024-02-28 09:48:13 +01:00
parent 2015d2d639
commit 508c423d94
3 changed files with 8 additions and 16 deletions
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6
net/mac80211/ieee80211_i.h
View file

@ -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;

6
net/mac80211/mlme.c
View file

@ -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.

12
net/mac80211/parse.c
View file

@ -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;