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Differential D55174

ifconfig: Add netlink helper to create interface
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Authored by pouria on Sun, Feb 8, 9:41 AM.

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Details

Reviewers

glebius
zlei
markj

Group Reviewers

Summary

Add a helper function for netlink to
be easier to create interfaces directly using netlink.
While here, fix style issue of a line above it.

Test Plan

will be used in ifconfig_geneve and
future netlink implementations in ifconfig.

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Passed

Unit

No Test Coverage

Build Status

Buildable 70637
Build 67520: arc lint + arc unit

Event Timeline

pouria created this revision.Sun, Feb 8, 9:41 AM

Herald added a subscriber: imp. · View Herald TranscriptSun, Feb 8, 9:41 AM

pouria requested review of this revision.Sun, Feb 8, 9:41 AM

Harbormaster completed remote builds in B70512: Diff 171439.Sun, Feb 8, 9:41 AM

pouria mentioned this in D54172: Add Support for Geneve (RFC8926).Sun, Feb 8, 4:23 PM

pouria added a child revision: D55184: ifconfig: Add support for geneve (netlink).Sun, Feb 8, 4:29 PM

glebius accepted this revision as: glebius.Thu, Feb 12, 12:01 AM

glebius added inline comments.

sbin/ifconfig/ifconfig_netlink.c
507–510	IMHO, we should errx() even if error_str is NULL.

This revision is now accepted and ready to land.Thu, Feb 12, 12:01 AM

Also (NETLINK) isn't a great error message at all. Please try grep errx sbin/ifconfig/*.c to check other error messages. Maybe just only contents of errmsg.error_str in the case it was provided and unknown error from netlink(4) in case it was not?

@glebius done.
Can I commit it?

This revision now requires review to proceed.Thu, Feb 12, 9:36 AM

Harbormaster completed remote builds in B70637: Diff 171813.Thu, Feb 12, 9:36 AM

After running my tests for this change, I remembered that
the netlink can reply with an NLMSG_ERROR containing error = 0.
That's why I didn't call errx() when error_str==NULL.

However, I've fixed the error message as you recommendeded. @glebius

Harbormaster completed remote builds in B70641: Diff 171819.Thu, Feb 12, 1:39 PM

In D55174#1263726, @pouria wrote:

After running my tests for this change, I remembered that
the netlink can reply with an NLMSG_ERROR containing error = 0.

That's real strange. Do you know how to reproduce that?

Revision Contents
Changeset List

Path

Size

sbin/

ifconfig/

ifconfig_netlink.h

3 lines

ifconfig_netlink.c

18 lines

Diff 171813

sbin/ifconfig/ifconfig_netlink.h

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sbin/ifconfig/ifconfig_netlink.c

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