| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 25 Jun 2008 20:56:35 +0200 From: "Julius Volz" <juliusv@...gle.com> To: "Thomas Graf" <tgraf@...g.ch> Cc: "Patrick McHardy" <kaber@...sh.net>, netdev@...r.kernel.org, "Vince Busam" <vbusam@...gle.com> Subject: Re: Sending big Netlink messages to userspace On Wed, Jun 25, 2008, Thomas Graf wrote: > libnl initializes the buffer size to the size of a page. The value > can be overwritten by calling nl_set_buffer_size(socket, rx, tx) Thanks, I missed that. Though now I won't need that anymore as I got the dump working! > Yes, that's how it's intended to work. You can fill until one of the > nla_put variantes aborts and starting trimming off what you've added > already using the nla_nest_cancel() methods until you reach a point > where you can safely cut your stream of attributes. So far we typically > made sure that this barrier is on netlink message level but is no > requirement. You may split a list into several messages you just > have to make sure that you call nla_nest_end() and nlmsg_end() properly > before you send the message. Ok, I did exactly that! Took me a while to figure out all of the necessary quirks (including userland), but now it works! :) So userspace now gets one callback invocation per part of a multipart message. I guess it's not possible to aggregate the data into just one callback invocation? Thanks again! Julius -- Google Switzerland GmbH -- 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
Powered by blists - more mailing lists