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[client/idd] input: synchronize keyboard LEDs

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Report guest HID keyboard LED state from LGInput to LGIdd and
publish it with the LGMP input endpoint status.

Forward SPICE modifier updates through the same provider state so evdev
can synchronize physical keyboard LEDs across transport changes and
reconnects.

Bump the versioned pipe and KVMFR input status contracts for the new
feedback state.

Accept earlier LGMP input status versions without LED feedback so the
client retains input while the guest driver is being upgraded.
This commit is contained in:
Geoffrey McRae
2026-08-21 05:06:59 +10:00
parent 1a5bdc14aa
commit 71733433ed
20 changed files with 425 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

87
client/transports/LGMP/input.c
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@@ -52,6 +52,18 @@
#define INPUT_MOUSE_DELTA_MIN (INT16_MIN * INPUT_MAX_SPLIT_REPORTS)
#define INPUT_MOUSE_DELTA_MAX (INT16_MAX * INPUT_MAX_SPLIT_REPORTS)
_Static_assert(
(int)LG_KEYBOARD_LED_NUM_LOCK ==
(int)KVMFR_INPUT_KEYBOARD_LED_NUM_LOCK &&
(int)LG_KEYBOARD_LED_CAPS_LOCK ==
(int)KVMFR_INPUT_KEYBOARD_LED_CAPS_LOCK &&
(int)LG_KEYBOARD_LED_SCROLL_LOCK ==
(int)KVMFR_INPUT_KEYBOARD_LED_SCROLL_LOCK &&
(int)LG_KEYBOARD_LED_COMPOSE ==
(int)KVMFR_INPUT_KEYBOARD_LED_COMPOSE &&
(int)LG_KEYBOARD_LED_KANA == (int)KVMFR_INPUT_KEYBOARD_LED_KANA,
"Client and KVMFR keyboard LED bits differ");
enum LGMPInputMouseMode
{
LGMP_INPUT_MOUSE_NONE,
@@ -104,6 +116,8 @@ struct LGMPInput
bool claimed;
bool available;
bool ownerBlocked;
bool keyboardLEDsValid;
uint8_t keyboardLEDs;
uint32_t generation;
uint32_t sequence;
@@ -159,8 +173,10 @@ static LG_InputStatus inputStatus(const LGMPInput * input)
{
return (LG_InputStatus)
{
.available = input->available,
.generation = input->endpointGeneration,
.available = input->available,
.generation = input->endpointGeneration,
.keyboardLEDsValid = input->available && input->keyboardLEDsValid,
.keyboardLEDs = input->keyboardLEDs,
};
}
@@ -227,12 +243,15 @@ static void connectionFailed(LGMPInput * input, LGMP_STATUS status)
++input->stats.counters.terminalFailures;
}
if (input->available || input->endpointGeneration)
if (input->available || input->endpointGeneration ||
input->keyboardLEDsValid)
input->notifyStatus = true;
input->connected = false;
input->claimed = false;
input->available = false;
input->ownerBlocked = false;
input->keyboardLEDsValid = false;
input->keyboardLEDs = 0;
input->pendingHead = 0;
input->pendingCount = 0;
input->mouseMode = LGMP_INPUT_MOUSE_NONE;
@@ -551,11 +570,25 @@ static bool validInputStatus(const KVMFRInputStatus * status)
KVMFR_INPUT_CAP_MOUSE_RELATIVE |
KVMFR_INPUT_CAP_MOUSE_ABSOLUTE |
KVMFR_INPUT_CAP_KEYBOARD;
static const uint32_t flags =
static const uint32_t commonFlags =
KVMFR_INPUT_STATUS_AVAILABLE |
KVMFR_INPUT_STATUS_HAS_OWNER;
static const uint8_t keyboardLEDs =
KVMFR_INPUT_KEYBOARD_LED_NUM_LOCK |
KVMFR_INPUT_KEYBOARD_LED_CAPS_LOCK |
KVMFR_INPUT_KEYBOARD_LED_SCROLL_LOCK |
KVMFR_INPUT_KEYBOARD_LED_COMPOSE |
KVMFR_INPUT_KEYBOARD_LED_KANA;
if (status->version != KVMFR_INPUT_VERSION ||
const bool supportedVersion = status->version > 0 &&
status->version <= KVMFR_INPUT_VERSION;
const bool keyboardLEDsVersion =
status->version >= KVMFR_INPUT_KEYBOARD_LEDS_VERSION;
const uint32_t flags = commonFlags |
(keyboardLEDsVersion ?
KVMFR_INPUT_STATUS_KEYBOARD_LEDS_VALID : 0);
if (!supportedVersion ||
status->capabilities & ~capabilities ||
status->flags & ~flags ||
!status->generation ||
@@ -567,6 +600,12 @@ static bool validInputStatus(const KVMFRInputStatus * status)
!status->streamGeneration)
return false;
if (status->keyboardLEDs & ~keyboardLEDs)
return false;
for (size_t i = 0; i < sizeof(status->statusReserved); ++i)
if (status->statusReserved[i])
return false;
for (size_t i = 0; i < sizeof(status->streamReserved) /
sizeof(status->streamReserved[0]); ++i)
if (status->streamReserved[i])
@@ -617,8 +656,14 @@ static bool validInputStatus(const KVMFRInputStatus * status)
(status->flags & KVMFR_INPUT_STATUS_AVAILABLE) != 0;
const bool hasOwner =
(status->flags & KVMFR_INPUT_STATUS_HAS_OWNER) != 0;
const bool keyboardLEDsValid = keyboardLEDsVersion &&
(status->flags & KVMFR_INPUT_STATUS_KEYBOARD_LEDS_VALID) != 0;
if (!available && (status->capabilities || hasOwner))
return false;
if (!keyboardLEDsValid && status->keyboardLEDs)
return false;
if (!available && keyboardLEDsValid)
return false;
if (available &&
(status->capabilities &
(KVMFR_INPUT_CAP_MOUSE_RELATIVE | KVMFR_INPUT_CAP_KEYBOARD)) !=
@@ -714,10 +759,12 @@ static bool reconcileInputStream(LGMPInput * input,
static void applyInputStatus(LGMPInput * input,
const KVMFRInputStatus * status, uint32_t serial, bool * wake)
{
const bool wasValid = input->statusValid;
const bool wasAvailable = input->available;
const uint32_t oldCapabilities = input->capabilities;
const uint32_t oldGeneration = input->endpointGeneration;
const bool wasValid = input->statusValid;
const bool wasAvailable = input->available;
const uint32_t oldCapabilities = input->capabilities;
const uint32_t oldGeneration = input->endpointGeneration;
const bool oldKeyboardLEDsValid = input->keyboardLEDsValid;
const uint8_t oldKeyboardLEDs = input->keyboardLEDs;
const bool targetAvailable =
(status->flags & KVMFR_INPUT_STATUS_AVAILABLE) != 0;
const bool endpointChanged = wasValid &&
@@ -730,6 +777,9 @@ static void applyInputStatus(LGMPInput * input,
input->endpointGeneration = status->generation;
input->statusOwnerClientID = status->ownerClientID;
input->statusOwnerGeneration = status->ownerGeneration;
input->keyboardLEDsValid =
(status->flags & KVMFR_INPUT_STATUS_KEYBOARD_LEDS_VALID) != 0;
input->keyboardLEDs = status->keyboardLEDs;
const bool streamChanged = reconcileInputStream(input, status);
const bool available = targetAvailable &&
input->streamEndpointBound;
@@ -773,7 +823,9 @@ static void applyInputStatus(LGMPInput * input,
if (!wasValid || wasAvailable != available ||
oldCapabilities != status->capabilities ||
oldGeneration != status->generation)
oldGeneration != status->generation ||
oldKeyboardLEDsValid != input->keyboardLEDsValid ||
oldKeyboardLEDs != input->keyboardLEDs)
input->notifyStatus = true;
}
@@ -1112,6 +1164,8 @@ bool lgmpInput_connect(LGMPInput * input, uint32_t clientID)
input->claimed = false;
input->available = false;
input->ownerBlocked = false;
input->keyboardLEDsValid = false;
input->keyboardLEDs = 0;
input->pendingHead = 0;
input->pendingCount = 0;
input->clientID = clientID;
@@ -1170,11 +1224,14 @@ void lgmpInput_disconnect(LGMPInput * input)
input->pendingCount = 0;
input->connected = false;
input->claimed = false;
if (input->available || input->endpointGeneration)
if (input->available || input->endpointGeneration ||
input->keyboardLEDsValid)
input->notifyStatus = true;
input->available = false;
input->ownerBlocked = false;
input->capabilities = 0;
input->available = false;
input->ownerBlocked = false;
input->keyboardLEDsValid = false;
input->keyboardLEDs = 0;
input->capabilities = 0;
input->streamEndpointBound = false;
memset(&input->streamEndpoint, 0,
sizeof(input->streamEndpoint));
@@ -1196,6 +1253,8 @@ void lgmpInput_disconnect(LGMPInput * input)
detachInputStream(input);
input->available = false;
input->ownerBlocked = false;
input->keyboardLEDsValid = false;
input->keyboardLEDs = 0;
input->statusValid = false;
input->ownerConfirmed = false;
input->notifyStatus = false;