diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2012-12-10 14:57:42 +0400 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-01-03 16:01:15 +0400 |
| commit | a357d7f9855e3002d6aaaea5c40dd1ac02b78de7 (patch) | |
| tree | 8e292e42105d5837acf61d1808e3e2d3974972ec /drivers | |
| parent | f4eabc918c3b88763bc20dd9e2b248aa6c757005 (diff) | |
| download | linux-a357d7f9855e3002d6aaaea5c40dd1ac02b78de7.tar.xz | |
mac80211_hwsim: allow testing paged RX
Paged RX, i.e. SKBs with (some of) the data in pages instead
of the SKB header data (skb->data) can behave differently in
the stack and cause other bugs. To make debugging easier add
an option to hwsim to test with such SKBs.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/mac80211_hwsim.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index ff9085502bea..145498f8411f 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -48,6 +48,10 @@ static int channels = 1; module_param(channels, int, 0444); MODULE_PARM_DESC(channels, "Number of concurrent channels"); +static bool paged_rx = false; +module_param(paged_rx, bool, 0644); +MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones"); + /** * enum hwsim_regtest - the type of regulatory tests we offer * @@ -755,9 +759,25 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw, * reserve some space for our vendor and the normal * radiotap header, since we're copying anyway */ - nskb = skb_copy_expand(skb, 64, 0, GFP_ATOMIC); - if (nskb == NULL) - continue; + if (skb->len < PAGE_SIZE && paged_rx) { + struct page *page = alloc_page(GFP_ATOMIC); + + if (!page) + continue; + + nskb = dev_alloc_skb(128); + if (!nskb) { + __free_page(page); + continue; + } + + memcpy(page_address(page), skb->data, skb->len); + skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len); + } else { + nskb = skb_copy(skb, GFP_ATOMIC); + if (!nskb) + continue; + } if (mac80211_hwsim_addr_match(data2, hdr->addr1)) ack = true; |