The ioctl SIOCGIWAP is important for getting socket informations. For example, /sbin/iwgetid from net-wireless/wireless-tools, which I heavily depend on, is not able to get accesspoint or other informations from the network anymore. Reproducible: Always Steps to Reproduce: 1. strace iwgetid wlan0 --scheme --ap Actual Results: +++ exited with 255 +++ Expected Results: Should give the accesspoint informations and exit 0 The former kernel, 6.6.74, was working great. Unfortunable it is not botable anymore as the systemd rott, linking all to /usr has happened even that I have a split-user profile!
(In reply to Klaus Ethgen from comment #0) > The ioctl SIOCGIWAP is important for getting socket informations. For > example, /sbin/iwgetid from net-wireless/wireless-tools, which I heavily > depend on, is not able to get accesspoint or other informations from the > network anymore. > I can't immediately see what would've caused this (can't spot any relevant commits). I guess some default config option may have changed. > > > Reproducible: Always > > Steps to Reproduce: > 1. strace iwgetid wlan0 --scheme --ap > > Actual Results: > +++ exited with 255 +++ Showing the actual bad strace line may be helpful. > > Expected Results: > Should give the accesspoint informations and exit 0 > > The former kernel, 6.6.74, was working great. Unfortunable it is not botable > anymore as the systemd rott, linking all to /usr has happened even that I > have a split-user profile! See https://www.gentoo.org/support/news-items/2024-01-05-usr-initramfs.html. Not really anything to do with merged-usr or split-usr.
Well, sorry about not posting the full strace. Now I am unable to reproduce as I had to block that kernel altogether. But the return of that ioctl was -ENOIOCTLCMD.
I was wrong about the returned error. Today, I removed the masks and installed the broken kernel again. Here is the relevant part of the strace: socket(AF_INET, SOCK_DGRAM, IPPROTO_IP) = 3 ioctl(3, SIOCGIWAP, 0x7fff6660bb70) = -1 EOPNOTSUPP (Die Operation wird nicht unterstützt) close(3) = 0 exit_group(-1) = ? +++ exited with 255 +++ Please note that the EOPNOTSUPP is undokumented in the manual of that system call!
I believe that ioctl is part of the WEXT legacy interface. You would need to rebuild the kernel with CONFIG_CFG80211_WEXT enabled to use it with modern kernels. Alternatively, migrate to more modern userspace tools.
I have no problem with migrating to other tool, given that I can extract the same information with them. But unfortunately, iwgetid is the only one I found, that can extract ssid or accesspoint from a wireless interface. The question might be, why this config is disabled between 6.6 and 6.12?
In 6.6, CFG80211_WEXT requires the RTL8723BS driver. In 6.12, the RTL8723BS driver no longer requires it, so the option defaults to disabled. Upstream kernel change: https://web.git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=71cea1fe415681ad00a9550c2ed107b8da16d5b6
(In reply to Klaus Ethgen from comment #5) > I have no problem with migrating to other tool, given that I can extract the > same information with them. I assume you should be able to get the information using some invocation of the "iw" tool. If not, you could request it be added as a feature.
(In reply to Mike Gilbert from comment #6) > In 6.6, CFG80211_WEXT requires the RTL8723BS driver. This should say that RTL8723BS requires CFG80211_WEXT.
