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Differential D38283

netlink: return optional metadata with the operation result.
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Authored by melifaro on Jan 30 2023, 6:40 PM.

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network
manpages

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rG72467b39f1db: netlink: return optional metadata with the operation result.
rG25c2dd2f2c6c: netlink: return optional metadata with the operation result.

Summary

Some operations like interface creation may need to return metadata - in this case, interface name - back to the caller if the operation is successful.

This change implements attaching an NLMSGERR_ATTR_COOKIE nla to the operation reply message via nlmsg_report_cookie().
Additionally, on successful interface creation, interface index and interface name are returned in the IFLA_NEW_IFINDEX and IFLA_IFNAME TLVs, encapsulated in the NLMSGERR_ATTR_COOKIE`.

MFC after: 1 week

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rG FreeBSD src repository

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Event Timeline

melifaro created this revision.Jan 30 2023, 6:40 PM

Herald added subscribers: glebius, ae, imp. · View Herald TranscriptJan 30 2023, 6:40 PM

melifaro requested review of this revision.Jan 30 2023, 6:40 PM

Harbormaster completed remote builds in B49334: Diff 116061.Jan 30 2023, 6:40 PM

melifaro edited the summary of this revision. (Show Details)Jan 30 2023, 6:41 PM

melifaro added a reviewer: network.

melifaro added a reviewer: manpages.

Fix python code formatting.

Harbormaster completed remote builds in B49352: Diff 116102.Jan 31 2023, 1:40 PM

Manual page change LGTM. Can't speak to consistency with source code.

This revision is now accepted and ready to land.Jan 31 2023, 6:01 PM

This revision was landed with ongoing or failed builds.Feb 9 2023, 3:30 PM

Closed by commit rG25c2dd2f2c6c: netlink: return optional metadata with the operation result. (authored by melifaro). · Explain Why

This revision was automatically updated to reflect the committed changes.

melifaro added a commit: rG25c2dd2f2c6c: netlink: return optional metadata with the operation result..

melifaro added a commit: rG72467b39f1db: netlink: return optional metadata with the operation result..Feb 20 2023, 2:34 PM

Revision Contents
Changeset List

Path

Size

share/

man/

man4/

4 lines

7 lines

sys/

netlink/

netlink_message_parser.h

4 lines

netlink_message_parser.c

19 lines

netlink_message_writer.h

31 lines

netlink_message_writer.c

6 lines

route/

iface_drivers.c

37 lines

tests/

atf_python/

sys/

net/

134 lines

sys/

netlink/

test_rtnl_iface.py

35 lines

Diff 116846

share/man/man4/netlink.4

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share/man/man4/rtnetlink.4

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sys/netlink/netlink_message_parser.h

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sys/netlink/netlink_message_parser.c

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sys/netlink/netlink_message_writer.h

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sys/netlink/netlink_message_writer.c

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sys/netlink/route/iface_drivers.c

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tests/atf_python/sys/net/netlink.py

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tests/sys/netlink/test_rtnl_iface.py

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