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Date: Mon, 01 Apr 2013 14:32:44 -0700 From: Ben Greear <greearb@...delatech.com> To: David Miller <davem@...emloft.net> CC: stephen@...workplumber.org, netdev@...r.kernel.org Subject: Re: [PATCH] net-sysfs: make flags symmetrical On 04/01/2013 02:18 PM, David Miller wrote: > From: Ben Greear <greearb@...delatech.com> > Date: Mon, 01 Apr 2013 13:16:43 -0700 > >> I am depending on this feature. There is no other way I know >> of to determine if an interface is actually currently acting >> PROMISC or not. > > Netlink interface dump, SIOGIFCONF, etc. should provide this > information in one form or another. From looking elsewhere in my code, I think you are right, at least about netlink. The IFLA_PROMISCUITY field seems to give good results, but if you try to parse the ifinfomsg->ifi_flags method, it may lie to you and tell you the netdev is not PROMISSC when it really is PROMISC. I haven't tried SIOGIFCONF... Either way, I'd prefer the sysfs flags stay as is...while I have the netlink interface coded up in my app, it is not exactly light programming and other tools may find it much easier to use the sysfs flags. And, since I've been using the sysfs flags to double-check netlink in some cases, I'll have to add yet more hacks if this compatibility is broken in newer kernels... Thanks, Ben -- Ben Greear <greearb@...delatech.com> Candela Technologies Inc http://www.candelatech.com -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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