From 59ae1d127ac0ae404baf414c434ba2651b793f46 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 16 Jun 2017 14:29:20 +0200 Subject: networking: introduce and use skb_put_data() A common pattern with skb_put() is to just want to memcpy() some data into the new space, introduce skb_put_data() for this. An spatch similar to the one for skb_put_zero() converts many of the places using it: @@ identifier p, p2; expression len, skb, data; type t, t2; @@ ( -p = skb_put(skb, len); +p = skb_put_data(skb, data, len); | -p = (t)skb_put(skb, len); +p = skb_put_data(skb, data, len); ) ( p2 = (t2)p; -memcpy(p2, data, len); | -memcpy(p, data, len); ) @@ type t, t2; identifier p, p2; expression skb, data; @@ t *p; ... ( -p = skb_put(skb, sizeof(t)); +p = skb_put_data(skb, data, sizeof(t)); | -p = (t *)skb_put(skb, sizeof(t)); +p = skb_put_data(skb, data, sizeof(t)); ) ( p2 = (t2)p; -memcpy(p2, data, sizeof(*p)); | -memcpy(p, data, sizeof(*p)); ) @@ expression skb, len, data; @@ -memcpy(skb_put(skb, len), data, len); +skb_put_data(skb, data, len); (again, manually post-processed to retain some comments) Reviewed-by: Stephen Hemminger Signed-off-by: Johannes Berg Signed-off-by: David S. Miller --- net/mac80211/tdls.c | 32 +++++++++++--------------------- 1 file changed, 11 insertions(+), 21 deletions(-) (limited to 'net/mac80211/tdls.c') diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c index c379c99cd1d8..86740670102d 100644 --- a/net/mac80211/tdls.c +++ b/net/mac80211/tdls.c @@ -388,8 +388,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, before_ext_cap, ARRAY_SIZE(before_ext_cap), offset); - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); offset = noffset; } @@ -418,8 +417,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, before_ht_cap, ARRAY_SIZE(before_ht_cap), offset); - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); offset = noffset; } @@ -490,8 +488,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, before_vht_cap, ARRAY_SIZE(before_vht_cap), offset); - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); offset = noffset; } @@ -532,8 +529,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, /* add any remaining IEs */ if (extra_ies_len) { noffset = extra_ies_len; - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); } } @@ -575,8 +571,7 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, before_qos, ARRAY_SIZE(before_qos), offset); - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); offset = noffset; } @@ -596,8 +591,7 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, before_ht_op, ARRAY_SIZE(before_ht_op), offset); - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); offset = noffset; } @@ -638,8 +632,7 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, /* add any remaining IEs */ if (extra_ies_len) { noffset = extra_ies_len; - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); } } @@ -670,8 +663,7 @@ ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata, before_lnkie, ARRAY_SIZE(before_lnkie), offset); - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); offset = noffset; } @@ -680,8 +672,7 @@ ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata, /* add any remaining IEs */ if (extra_ies_len) { noffset = extra_ies_len; - pos = skb_put(skb, noffset - offset); - memcpy(pos, extra_ies + offset, noffset - offset); + pos = skb_put_data(skb, extra_ies + offset, noffset - offset); } } @@ -696,7 +687,7 @@ ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata, ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); if (extra_ies_len) - memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len); + skb_put_data(skb, extra_ies, extra_ies_len); } static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, @@ -726,8 +717,7 @@ static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, case WLAN_TDLS_TEARDOWN: case WLAN_TDLS_DISCOVERY_REQUEST: if (extra_ies_len) - memcpy(skb_put(skb, extra_ies_len), extra_ies, - extra_ies_len); + skb_put_data(skb, extra_ies, extra_ies_len); if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); break; -- cgit v1.2.3