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Differential D33260

ifnet: use ck_pr(3) store & load setting ifnet pointer in ifindex
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Authored by glebius on Dec 4 2021, 9:15 PM.
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bz
kp
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network
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rG450394af27bc: ifnet: use ck_pr(3) store & load setting ifnet pointer in ifindex
Summary

The lockless access to the array is protected by the network epoch.

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rS FreeBSD src repository - subversion
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Buildable 43139
Build 40027: arc lint + arc unit

Event Timeline

glebius created this revision.Dec 4 2021, 9:15 PM
Herald added subscribers: melifaro, ae, imp. · View Herald TranscriptDec 4 2021, 9:15 PM
glebius requested review of this revision.Dec 4 2021, 9:15 PM
Harbormaster completed remote builds in B43139: Diff 99448.Dec 4 2021, 9:15 PM
glebius added a parent revision: D33259: ifnet: allocate index at the end of if_alloc_domain().Dec 4 2021, 9:15 PM
glebius added a child revision: D33261: ifnet: initial if_grow() shall always succeed.
bz added a comment.Dec 5 2021, 5:52 PM

I think there should only be one function for "store" pointer which is ifnet_setbyindex(); that'll be possible if you consider my comment from D33259; though in the longer term it probably won't matter to have the other one for ifindex_free() as we'd still guarantee that all accesses go through wrapper functions so we can keep changing the internals.

If you can explain the added WASSERT I am fine with this.

sys/net/if.c
416

Contrary to your description, why do you need to add this suddenly here?

glebius added inline comments.Dec 5 2021, 5:57 PM
sys/net/if.c
416

Can be removed, but it still removed when all index allocation bits are merged into one in D33262

kp accepted this revision as: kp.Dec 6 2021, 10:48 AM
This revision is now accepted and ready to land.Dec 6 2021, 10:48 AM
Closed by commit rG450394af27bc: ifnet: use ck_pr(3) store & load setting ifnet pointer in ifindex (authored by glebius). · Explain WhyDec 6 2021, 5:33 PM
This revision was automatically updated to reflect the committed changes.
glebius added a commit: rG450394af27bc: ifnet: use ck_pr(3) store & load setting ifnet pointer in ifindex.

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sys/
net/
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Diff 99448

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sys/net/if.c

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