On 09/29/2008 12:25 PM, Johannes Berg wrote:
> Jiri, can you tell me what happens with iw? iw phy phy0 info or
> something.
Well, with this patch:
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 1221d72..98fd93a 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -246,16 +246,26 @@ static int nl80211_get_wiphy(struct sk_buff *skb, struct
genl_info *info)
{
struct sk_buff *msg;
struct cfg80211_registered_device *dev;
+ size_t bufsize = NLMSG_GOODSIZE;
+ unsigned int tries = 0;
+ int ret;
dev = cfg80211_get_dev_from_info(info);
if (IS_ERR(dev))
return PTR_ERR(dev);
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+retry:
+ msg = nlmsg_new(bufsize, GFP_KERNEL);
if (!msg)
goto out_err;
- if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
+ ret = nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev);
+ if (ret == -EMSGSIZE && ++tries < 2) {
+ bufsize *= 2;
+ nlmsg_free(msg);
+ goto retry;
+ }
+ if (ret < 0)
goto out_free;
cfg80211_put_dev(dev);
-----8<----------------8<----------------8<----------------8<-----
I get:
Wiphy phy0
Band 1:
Frequencies:
* 2412 MHz (passive scanning, no IBSS)
* 2417 MHz (passive scanning, no IBSS)
* 2422 MHz (passive scanning, no IBSS)
* 2427 MHz (passive scanning, no IBSS)
* 2432 MHz (passive scanning, no IBSS)
* 2437 MHz (passive scanning, no IBSS)
* 2442 MHz (passive scanning, no IBSS)
* 2447 MHz (passive scanning, no IBSS)
* 2452 MHz (passive scanning, no IBSS)
* 2457 MHz (passive scanning, no IBSS)
* 2462 MHz (passive scanning, no IBSS)
* 2467 MHz (disabled)
* 2472 MHz (disabled)
* 2484 MHz (disabled)
* 2512 MHz (disabled)
* 2532 MHz (disabled)
* 2552 MHz (disabled)
* 2572 MHz (disabled)
* 2592 MHz (disabled)
* 2612 MHz (disabled)
* 2632 MHz (disabled)
* 2652 MHz (disabled)
* 2672 MHz (disabled)
* 2692 MHz (disabled)
* 2712 MHz (disabled)
* 2732 MHz (disabled)
Bitrates:
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Band 2:
Frequencies:
* 5135 MHz (disabled)
* 5140 MHz (disabled)
* 5145 MHz (disabled)
* 5150 MHz (disabled)
* 5155 MHz (disabled)
* 5160 MHz (disabled)
* 5165 MHz (disabled)
* 5170 MHz (disabled)
* 5175 MHz (disabled)
* 5180 MHz (disabled)
* 5185 MHz (disabled)
* 5190 MHz (disabled)
* 5195 MHz (disabled)
* 5200 MHz (disabled)
* 5205 MHz (disabled)
* 5210 MHz (disabled)
* 5215 MHz (disabled)
* 5220 MHz (disabled)
* 5225 MHz (disabled)
* 5230 MHz (disabled)
* 5235 MHz (disabled)
* 5240 MHz (disabled)
* 5245 MHz (disabled)
* 5250 MHz (disabled)
* 5255 MHz (disabled)
* 5260 MHz (disabled)
* 5265 MHz (disabled)
* 5270 MHz (disabled)
* 5275 MHz (disabled)
* 5280 MHz (disabled)
* 5285 MHz (disabled)
* 5290 MHz (disabled)
* 5295 MHz (disabled)
* 5300 MHz (disabled)
* 5305 MHz (disabled)
* 5310 MHz (disabled)
* 5315 MHz (disabled)
* 5320 MHz (disabled)
* 5325 MHz (disabled)
* 5330 MHz (disabled)
* 5335 MHz (disabled)
* 5340 MHz (disabled)
* 5345 MHz (disabled)
* 5350 MHz (disabled)
* 5355 MHz (disabled)
* 5360 MHz (disabled)
* 5365 MHz (disabled)
* 5370 MHz (disabled)
* 5375 MHz (disabled)
* 5380 MHz (disabled)
* 5385 MHz (disabled)
* 5390 MHz (disabled)
* 5395 MHz (disabled)
* 5400 MHz (disabled)
* 5405 MHz (disabled)
* 5410 MHz (disabled)
* 5415 MHz (disabled)
* 5420 MHz (disabled)
* 5425 MHz (disabled)
* 5430 MHz (disabled)
* 5435 MHz (disabled)
* 5440 MHz (disabled)
* 5445 MHz (disabled)
* 5450 MHz (disabled)
* 5455 MHz (disabled)
* 5460 MHz (disabled)
* 5465 MHz (disabled)
* 5470 MHz (disabled)
* 5475 MHz (disabled)
* 5480 MHz (disabled)
* 5485 MHz (disabled)
* 5490 MHz (disabled)
* 5495 MHz (disabled)
* 5500 MHz (disabled)
* 5505 MHz (disabled)
* 5510 MHz (disabled)
* 5515 MHz (disabled)
* 5520 MHz (disabled)
* 5525 MHz (disabled)
* 5530 MHz (disabled)
* 5535 MHz (disabled)
* 5540 MHz (disabled)
* 5545 MHz (disabled)
* 5550 MHz (disabled)
* 5555 MHz (disabled)
* 5560 MHz (disabled)
* 5565 MHz (disabled)
* 5570 MHz (disabled)
* 5575 MHz (disabled)
* 5580 MHz (disabled)
* 5585 MHz (disabled)
* 5590 MHz (disabled)
* 5595 MHz (disabled)
* 5600 MHz (disabled)
* 5605 MHz (disabled)
* 5610 MHz (disabled)
* 5615 MHz (disabled)
* 5620 MHz (disabled)
* 5625 MHz (disabled)
* 5630 MHz (disabled)
* 5635 MHz (disabled)
* 5640 MHz (disabled)
* 5645 MHz (disabled)
* 5650 MHz (disabled)
* 5655 MHz (disabled)
* 5660 MHz (disabled)
* 5665 MHz (disabled)
* 5670 MHz (disabled)
* 5675 MHz (disabled)
* 5680 MHz (disabled)
* 5685 MHz (disabled)
* 5690 MHz (disabled)
* 5695 MHz (disabled)
* 5700 MHz (disabled)
* 5705 MHz (disabled)
* 5710 MHz (disabled)
* 5715 MHz (disabled)
* 5720 MHz (disabled)
* 5725 MHz (disabled)
* 5730 MHz (disabled)
* 5735 MHz (disabled)
* 5740 MHz (disabled)
* 5745 MHz (disabled)
* 5750 MHz (disabled)
* 5755 MHz (disabled)
* 5760 MHz (disabled)
* 5765 MHz (disabled)
* 5770 MHz (disabled)
* 5775 MHz (disabled)
* 5780 MHz (disabled)
* 5785 MHz (disabled)
* 5790 MHz (disabled)
* 5795 MHz (disabled)
* 5800 MHz (disabled)
* 5805 MHz (disabled)
* 5810 MHz (disabled)
* 5815 MHz (disabled)
* 5820 MHz (disabled)
* 5825 MHz (disabled)
* 5830 MHz (disabled)
* 5835 MHz (disabled)
* 5840 MHz (disabled)
* 5845 MHz (disabled)
* 5850 MHz (disabled)
* 5855 MHz (disabled)
* 5860 MHz (disabled)
* 5865 MHz (disabled)
* 5870 MHz (disabled)
* 5875 MHz (disabled)
* 5880 MHz (disabled)
* 5885 MHz (disabled)
* 5890 MHz (disabled)
* 5895 MHz (disabled)
* 5900 MHz (disabled)
* 5905 MHz (disabled)
* 5910 MHz (disabled)
* 5915 MHz (disabled)
* 5920 MHz (disabled)
* 5925 MHz (disabled)
* 5930 MHz (disabled)
* 5935 MHz (disabled)
* 5940 MHz (disabled)
* 5945 MHz (disabled)
* 5950 MHz (disabled)
* 5955 MHz (disabled)
* 5960 MHz (disabled)
* 5965 MHz (disabled)
* 5970 MHz (disabled)
* 5975 MHz (disabled)
* 5980 MHz (disabled)
* 5985 MHz (disabled)
* 5990 MHz (disabled)
* 5995 MHz (disabled)
* 6000 MHz (disabled)
* 6005 MHz (disabled)
* 6010 MHz (disabled)
* 6015 MHz (disabled)
* 6020 MHz (disabled)
* 6025 MHz (disabled)
* 6030 MHz (disabled)
* 6035 MHz (disabled)
* 6040 MHz (disabled)
* 6045 MHz (disabled)
* 6050 MHz (disabled)
* 6055 MHz (disabled)
* 6060 MHz (disabled)
* 6065 MHz (disabled)
* 6070 MHz (disabled)
* 6075 MHz (disabled)
* 6080 MHz (disabled)
* 6085 MHz (disabled)
* 6090 MHz (disabled)
* 6095 MHz (disabled)
* 6100 MHz (disabled)
Bitrates:
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Supported interface modes:
* IBSS
* Station
* AP
* AP(VLAN)
* Monitor
* mesh point
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