Module Name: src
Committed By: riastradh
Date: Mon Aug 31 20:33:58 UTC 2020
Modified Files:
src/sys/net: if_wg.c
Log Message:
wg: Simplify locking.
Summary: Access to a stable established session is still allowed via
psref; all other access to peer and session state is now serialized
by struct wg_peer::wgp_lock, with no dancing around a per-session
lock. This way, the handshake paths are locked, while the data
transmission paths are pserialized.
- Eliminate struct wg_session::wgs_lock.
- Eliminate wg_get_unstable_session -- access to the unstable session
is allowed only with struct wgp_peer::wgp_lock held.
- Push INIT_PASSIVE->ESTABLISHED transition down into a thread task.
- Push rekey down into a thread task.
- Allocate session indices only on transition from UNKNOWN and free
them only on transition back to UNKNOWN.
- Be a little more explicit about allowed state transitions, and
reject some nonsensical ones.
- Sprinkle assertions and comments.
- Reduce atomic r/m/w swap operations that can just as well be
store-release.
To generate a diff of this commit:
cvs rdiff -u -r1.48 -r1.49 src/sys/net/if_wg.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
