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libink: let a handler park its call and reply later

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The park machinery was welded to broker uid resolution; a handler
that cannot answer yet, like a device-settle call waiting for the
event queue to drain, had no way to defer.  link_call_park() holds
the request, link_call_resume() re-runs the handler with
link_call_resumed() reading true, and the expire sweep remains the
backstop for a resume that never comes.

Resume also no longer drops a local caller's kernel group set in the
privileged re-check: group source now keys on broker-ness.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
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Joachim Wiberg committed 2026-08-16 22:03:42 +02:00
1 parent 2b861ea0af
commit 1bb7d508a4
4 files changed
+88 -11
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libink/marshal.h
+1 -1
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@@ -21,8 +21,8 @@ ssize_t __w_finish(struct link_writer *w);
void __w_byte (struct link_writer *w, uint8_t v);
void __w_bool (struct link_writer *w, int v);
void __w_u64 (struct link_writer *w, uint64_t v);
void __w_u32 (struct link_writer *w, uint32_t v);
void __w_u64 (struct link_writer *w, uint64_t v);
void __w_string (struct link_writer *w, const char *s); /* "s" */
void __w_path (struct link_writer *w, const char *s); /* "o" */
void __w_sig (struct link_writer *w, const char *s); /* "g" */