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Commit ebd82b39 authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: make station hash table max_size configurable 



Allow debug builds to configure the station hash table maximum
size in order to run with hash collisions in limited scenarios
such as hwsim testing. The default remains 0 which effectively
means no limit.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 80616c0d

net/mac80211/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -305,3 +305,13 @@ config MAC80211_DEBUG_COUNTERS 
	  and show them in debugfs.



	  If unsure, say N.



config MAC80211_STA_HASH_MAX_SIZE

	int "Station hash table maximum size" if MAC80211_DEBUG_MENU

	default 0

	---help---

	  Setting this option to a low value (e.g. 4) allows testing the

	  hash table with collisions relatively deterministically (just

	  connect more stations than the number selected here.)



	  If unsure, leave the default of 0.

net/mac80211/sta_info.c

+1 −0
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ static const struct rhashtable_params sta_rht_params = { 
	.key_offset = offsetof(struct sta_info, sta.addr),

	.key_len = ETH_ALEN,

	.hashfn = sta_addr_hash,

	.max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,

};



/* Caller must hold local->sta_mtx */