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ipn/ipnlocal: add basic support for netmap caching (#18530)

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This commit is based on ff0978ab, and extends #18497 to connect network map
caching to the LocalBackend. As implemented, only "whole" netmap values are
stored, and we do not yet handle incremental updates. As-written, the feature must
be explicitly enabled via the TS_USE_CACHED_NETMAP envknob, and must be
considered experimental.

Updates #12639

Co-Authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Change-Id: I48a1e92facfbf7fb3a8e67cff7f2c9ab4ed62c83
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
This commit is contained in:
M. J. Fromberger
2026-02-17 14:51:54 -08:00
committed by GitHub
parent fbbf0d6669
commit f4aea70f7a
9 changed files with 192 additions and 8 deletions
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tsnet/depaware.txt
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@@ -236,6 +236,7 @@ tailscale.com/tsnet dependencies: (generated by github.com/tailscale/depaware)
💣 tailscale.com/ipn/ipnauth from tailscale.com/ipn/ipnext+
tailscale.com/ipn/ipnext from tailscale.com/ipn/ipnlocal
tailscale.com/ipn/ipnlocal from tailscale.com/ipn/localapi+
tailscale.com/ipn/ipnlocal/netmapcache from tailscale.com/ipn/ipnlocal
tailscale.com/ipn/ipnstate from tailscale.com/client/local+
tailscale.com/ipn/localapi from tailscale.com/tsnet
tailscale.com/ipn/store from tailscale.com/ipn/ipnlocal+