Date: Wed, 22 Oct 2008 08:24:07 -0700 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Eduardo Meyer <dudu.meyer@gmail.com> Cc: stable@freebsd.org, pluknet <pluknet@gmail.com> Subject: Re: Check if interface supports Device Polling Message-ID: <20081022152407.GA61546@icarus.home.lan> In-Reply-To: <20081022151228.GA60664@icarus.home.lan> References: <d3ea75b30810211154kae89e00j57798a34bda78299@mail.gmail.com> <a31046fc0810211429o145395efxbcf80904f1fb90ec@mail.gmail.com> <d3ea75b30810220709i489525fbgf6a83eca1ff594c9@mail.gmail.com> <20081022151228.GA60664@icarus.home.lan>
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On Wed, Oct 22, 2008 at 08:12:28AM -0700, Jeremy Chadwick wrote: > > # ifconfig -v rl0 caps > > Capabilities: 48 > > The above patch is completely unnecessary. The -m flag in ifconfig > will do what you want. > > However, the existing ifconfig code does not print POLLING as a > capability, which is where the bug truly lies. > > I'll provide a patch that extends the capability list properly, and will > allow you to determine a full capability list. I'm both correct and incorrect. Correct: ifconfig -m will show you want. No need for the patch. Incorrect: I missed the "POLLING" part of #define IFCAPBITS in ifconfig.c -- it is in fact listed there. Maybe the polling bit is only made available if you've built a kernel with "option DEVICE_POLLING"? For example, I can do "ifconfig em1 polling", which returns no error, but "ifconfig -m em1" does not show POLLING. (My kernel does NOT have DEVICE_POLLING defined.) In your above output, capabilities is 0x48, which means POLLING is available, and VLAN_MTU is available. You did not provide us output of "ifconfig -m rl0", but I'd be inclined to believe "POLLING" is shown there... I hope. :-) Also, it appears ifconfig does not print TOE4 or TOE6 capability bits; that's probably a missing feature. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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