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mac80211: split sta_info_add

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sta_info_add() has two functions: allocating a station info
structure and inserting it into the hash table/list. Splitting
these two functions allows allocating with GFP_KERNEL in many
places instead of GFP_ATOMIC which is now required by the RCU
protection. Additionally, in many places RCU protection is now
no longer needed at all because between sta_info_alloc() and
sta_info_insert() the caller owns the structure.

This fixes a few race conditions with setting initial flags
and similar, but not all (see comments in ieee80211_sta.c and
cfg.c). More documentation on the existing races will be in
a follow-up patch.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2008-02-25 16:27:47 +01:00
committed by John W. Linville
parent d0709a6518
commit 73651ee639
7 changed files with 166 additions and 74 deletions
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4
net/mac80211/mesh.h
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@@ -232,8 +232,8 @@ void mesh_neighbour_update(u8 *hw_addr, u64 rates, struct net_device *dev,
bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie,
struct net_device *dev);
void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
struct sta_info *mesh_plink_add(u8 *hw_addr, u64 rates,
struct ieee80211_sub_if_data *sdata);
struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
u8 *hw_addr, u64 rates, gfp_t gfp);
void mesh_plink_broken(struct sta_info *sta);
void mesh_plink_deactivate(struct sta_info *sta);
int mesh_plink_open(struct sta_info *sta);