Hi Luiz, I think spec writers' idea is to have a list of previously connected devices which is ordered by most recently connected. The size of this list may be limited to a number, meaning that the least recently connected device will be removed from the list. The devices in this list may or may not be bonded. This list is accessible to users, so they can easily reconnect to the most recently used device. I don't suppose we currently have this list, so I'm happy with just removing the virtually unplugged device. Thanks, Archie On Thu, 16 Jul 2020 at 01:31, Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx> wrote: > > Hi Archie, > > On Wed, Jul 15, 2020 at 7:15 AM Archie Pusaka <apusaka@xxxxxxxxxx> wrote: > > > > Hi Luiz, > > > > If we mark it as temporary, then the device will immediately get > > deleted upon disconnection. > > https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/src/adapter.c#n6875 > > This is the same situation as directly calling device_remove. > > > > May I know the reason why we want to put the device as temporary? > > > > If we currently don't have a way to keep a "previously connected but > > no longer bonded" device, then removing the device perhaps is the next > > best option. It still makes the user scan for the virtually > > disconnected device though. > > We keep a cache of previously known devices, but we only display them > once they are actually found otherwise it may grow too big which is > inconvenient, I wonder where this concept of "previously connected but > no longer bonded" comes from though, we had the temporary to map > devices that would not be persisted on the storage which I guess this > is what it is about, that said we could perhaps have a timeout before > setting it as temporary but we might want to integrate with the logic > of detecting devices disappearing. > > > Thanks, > > Archie > > > > On Wed, 15 Jul 2020 at 01:10, Luiz Augusto von Dentz > > <luiz.dentz@xxxxxxxxx> wrote: > > > > > > Hi Archie, > > > > > > On Tue, Jul 7, 2020 at 9:30 PM Archie Pusaka <apusaka@xxxxxxxxxx> wrote: > > > > > > > > Hi Luiz, > > > > > > > > As far as the spec is concerned, we can also remove the device by > > > > calling device_remove. However, I suppose it would be confusing for > > > > end users if they can no longer find their HID device on the device > > > > list just because the device previously sent a virtual cable > > > > disconnection. > > > > The HID 1.0 spec part 6.4.2 also gives an example of a possible > > > > scenario when a virtually cabled device is removed: "Unplugged devices > > > > shall be marked as known and put into a “most recently used list” of > > > > known devices to facilitate future re-connecting". > > > > > > Then perhaps we shall have it marked as temporary as well, that said > > > we do want to introduce disappearing logic so temporary devices are > > > not left dangling for too long. > > > > > > > Thanks, > > > > Archie > > > > > > > > > > > > On Wed, 8 Jul 2020 at 02:03, Luiz Augusto von Dentz > > > > <luiz.dentz@xxxxxxxxx> wrote: > > > > > > > > > > Hi Archie, > > > > > > > > > > On Sat, Jun 27, 2020 at 8:54 AM Archie Pusaka <apusaka@xxxxxxxxxx> wrote: > > > > > > > > > > > > From: Archie Pusaka <apusaka@xxxxxxxxxxxx> > > > > > > > > > > > > This patch splits the "bonding removal" function in device.c, > > > > > > because we need to remove bonding information when receiving > > > > > > "virtual cable unplug" in HID profile. > > > > > > > > > > > > Reviewed-by: Alain Michaud <alainm@xxxxxxxxxxxx> > > > > > > --- > > > > > > > > > > > > Changes in v2: None > > > > > > > > > > > > src/device.c | 25 +++++++++++++++---------- > > > > > > src/device.h | 1 + > > > > > > 2 files changed, 16 insertions(+), 10 deletions(-) > > > > > > > > > > > > diff --git a/src/device.c b/src/device.c > > > > > > index 7b0eb256e..9fb0e018c 100644 > > > > > > --- a/src/device.c > > > > > > +++ b/src/device.c > > > > > > @@ -4162,6 +4162,17 @@ static void delete_folder_tree(const char *dirname) > > > > > > rmdir(dirname); > > > > > > } > > > > > > > > > > > > +void device_remove_bonding(struct btd_device *device, uint8_t bdaddr_type) > > > > > > +{ > > > > > > + if (bdaddr_type == BDADDR_BREDR) > > > > > > + device->bredr_state.bonded = false; > > > > > > + else > > > > > > + device->le_state.bonded = false; > > > > > > + > > > > > > + btd_adapter_remove_bonding(device->adapter, &device->bdaddr, > > > > > > + bdaddr_type); > > > > > > +} > > > > > > + > > > > > > static void device_remove_stored(struct btd_device *device) > > > > > > { > > > > > > char device_addr[18]; > > > > > > @@ -4170,17 +4181,11 @@ static void device_remove_stored(struct btd_device *device) > > > > > > char *data; > > > > > > gsize length = 0; > > > > > > > > > > > > - if (device->bredr_state.bonded) { > > > > > > - device->bredr_state.bonded = false; > > > > > > - btd_adapter_remove_bonding(device->adapter, &device->bdaddr, > > > > > > - BDADDR_BREDR); > > > > > > - } > > > > > > + if (device->bredr_state.bonded) > > > > > > + device_remove_bonding(device, BDADDR_BREDR); > > > > > > > > > > > > - if (device->le_state.bonded) { > > > > > > - device->le_state.bonded = false; > > > > > > - btd_adapter_remove_bonding(device->adapter, &device->bdaddr, > > > > > > - device->bdaddr_type); > > > > > > - } > > > > > > + if (device->le_state.bonded) > > > > > > + device_remove_bonding(device, device->bdaddr_type); > > > > > > > > > > > > device->bredr_state.paired = false; > > > > > > device->le_state.paired = false; > > > > > > diff --git a/src/device.h b/src/device.h > > > > > > index 06b100499..907c7c5c4 100644 > > > > > > --- a/src/device.h > > > > > > +++ b/src/device.h > > > > > > @@ -49,6 +49,7 @@ uint16_t btd_device_get_vendor(struct btd_device *device); > > > > > > uint16_t btd_device_get_vendor_src(struct btd_device *device); > > > > > > uint16_t btd_device_get_product(struct btd_device *device); > > > > > > uint16_t btd_device_get_version(struct btd_device *device); > > > > > > +void device_remove_bonding(struct btd_device *device, uint8_t bdaddr_type); > > > > > > void device_remove(struct btd_device *device, gboolean remove_stored); > > > > > > > > > > Is there any particular reason why device_remove is not enough here? I > > > > > don't see any reason to leave the device object around after removing > > > > > its bonding. > > > > > > > > > > > int device_address_cmp(gconstpointer a, gconstpointer b); > > > > > > int device_bdaddr_cmp(gconstpointer a, gconstpointer b); > > > > > > -- > > > > > > 2.27.0.212.ge8ba1cc988-goog > > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz
