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refact: remove linux headless (#15866)

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* refact: remove linux headless

Signed-off-by: fufesou <linlong1266@gmail.com>

* fix(linux): probe DRM availability asynchronously on login

Signed-off-by: fufesou <linlong1266@gmail.com>

* revert changes in drm_capturer.rs

Signed-off-by: fufesou <linlong1266@gmail.com>

* Update submodule hbb_common

Signed-off-by: fufesou <linlong1266@gmail.com>

* docs(linux): clarify DRM availability comments

Remove stale headless and unauthenticated-request
wording, and document the Available-only login-screen gate.

Signed-off-by: fufesou <linlong1266@gmail.com>

* fix(linux): remove unreachable session cleanup branch

Remove the obsolete empty-session path and
clarify the intended use of cached DRM availability.

Signed-off-by: fufesou <linlong1266@gmail.com>

---------

Signed-off-by: fufesou <linlong1266@gmail.com>
This commit is contained in:
fufesou
2026-08-18 15:02:50 +08:00
committed by GitHub
parent 0c00d576dd
commit b0008edcb5
99 changed files with 133 additions and 2944 deletions
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20
src/server/drm_capturer.rs
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@@ -821,15 +821,14 @@ impl Drop for UinputRefreshGuard {
}
}
/// Never probes, never blocks: the form the ROUTING gates must use. Seconds of IPC inside
/// `wayland::clear()`, `is_inited()` or the display enumeration trips "deadline has elapsed".
/// Never probes or blocks. Use in hot paths such as `wayland::clear()`, `is_inited()`, and display
/// enumeration, where seconds of IPC would trip "deadline has elapsed".
pub(crate) fn is_available_cached() -> bool {
matches!(&*DRM_STATE.lock().unwrap(), ProbeState::Available(..))
}
/// The three honest answers the availability machinery can give. `Unsettled` — another probe in
/// flight, or a failure still below the disable threshold — is not a verdict, and the
/// login-screen headless decision must not read it as one.
/// A tri-state assessment of DRM capture availability.
/// `Unsettled` means a probe is in flight or failures have not reached the disable threshold.
#[derive(Clone, Copy, PartialEq, Eq)]
pub(crate) enum Availability {
Available,
@@ -843,9 +842,8 @@ pub(crate) enum Availability {
fn availability() -> Availability {
let (verdict, stale_no) = {
let st = DRM_STATE.lock().unwrap();
// A settled "no" STAYS the answer while an off-thread re-probe re-verifies it; going
// Unknown at expiry would reopen an Unsettled window every TTL on a helper-less box, and
// the login decision reads Unsettled as a possible greeter.
// Keep a settled "no" while an off-thread probe re-verifies it, avoiding a transient
// Unsettled result whenever the negative cache expires.
let stale_no =
matches!(&*st, ProbeState::Unavailable(since) if since.elapsed() >= NEGATIVE_TTL);
let verdict = match &*st {
@@ -878,10 +876,8 @@ fn availability() -> Availability {
probe_and_publish()
}
/// The non-blocking tri-state, for decisions on the LOGIN REQUEST path that must never wait: an
/// unauthenticated peer reaches that path, so a probe there would let it park a worker for the
/// probe deadline. Unknown kicks the probe off-thread and answers Unsettled, which the login
/// decision treats as a possibly servable greeter (no Xorg) until the state settles.
/// Non-blocking login-path assessment.
/// Unknown starts a probe off-thread; callers require `Available` before admitting a session.
pub(crate) fn availability_cached() -> Availability {
let (verdict, stale_no) = {
let st = DRM_STATE.lock().unwrap();