[Bluez-devel] Reboot notifier

[Bluez-devel] Reboot notifier

[Milind Dumbare]

Hi all,
	I think bluetooth stack for linux needs reboot notifier. I am thinking
of writing it. Shall I?
-- 
-Milind
"There is no place like 127.0.0.1"


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Re: [Bluez-devel] Reboot notifier

[Ulisses Furquim]

Hi Milind,

On 8/1/06, Milind Dumbare <milind@linsyssoft.com> wrote:
>         I think bluetooth stack for linux needs reboot notifier. I am thinking
> of writing it. Shall I?

Sorry, but I don't know what this "reboot notifier" feature really is.
Do you mind explaining it, please?

-- Ulisses

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Re: [Bluez-devel] Reboot notifier

[Milind Dumbare]

Hi,
	 Reboot notifier will register bluetooth driver to reboot notification
list of kernel. Whenever machine will get rebooted bluetooth drvier will
get notified by type of reboot(Halt/reboot/poweroff). We can do
interesting things after we get notified that reboot will be there.
	

On Tue, 2006-08-01 at 14:15 -0300, Ulisses Furquim wrote:
> Hi Milind,
> 
> On 8/1/06, Milind Dumbare <milind@linsyssoft.com> wrote:
> >         I think bluetooth stack for linux needs reboot notifier. I am thinking
> > of writing it. Shall I?
> 
> Sorry, but I don't know what this "reboot notifier" feature really is.
> Do you mind explaining it, please?
> 
> -- Ulisses
> 
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> 
-- 
-Milind
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Re: [Bluez-devel] Reboot notifier

[Milind Dumbare]

The first most useful think is doing module cleanup while rebooting.
About other things, you will know them more deeply. May be like keeping
informing user level utilities to do some interesting stuff like.
Keeping connection settings live post reboot or other.


On Wed, 2006-08-02 at 12:34 +0200, Marcel Holtmann wrote:
> Hi Milind,
> 
> > 	 Reboot notifier will register bluetooth driver to reboot notification
> > list of kernel. Whenever machine will get rebooted bluetooth drvier will
> > get notified by type of reboot(Halt/reboot/poweroff). We can do
> > interesting things after we get notified that reboot will be there.
> 
> you must be more specific, because I don't see any need for such a
> notifier. What do we get from knowing such events.
> 
> Regards
> 
> Marcel
> 
> 
> 
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> 
-- 
-Milind
"There is no place like 127.0.0.1"


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Re: [Bluez-devel] Reboot notifier

[Marcel Holtmann]

Hi Milind,

> 	 Reboot notifier will register bluetooth driver to reboot notification
> list of kernel. Whenever machine will get rebooted bluetooth drvier will
> get notified by type of reboot(Halt/reboot/poweroff). We can do
> interesting things after we get notified that reboot will be there.

you must be more specific, because I don't see any need for such a
notifier. What do we get from knowing such events.

Regards

Marcel



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Re: [Bluez-devel] Reboot notifier

[Milind Dumbare]

On Wed, 2006-08-02 at 15:32 +0200, Marcel Holtmann wrote:
> Hi Milind,
> 
> > The first most useful think is doing module cleanup while rebooting.
> > About other things, you will know them more deeply. May be like keeping
> > informing user level utilities to do some interesting stuff like.
> > Keeping connection settings live post reboot or other.
> 
> there is no need for a module cleanup. And unloading of kernel modules
> still has to be considered as a race condition.
> 
> Once you reset the USB bus for example all USB Bluetooth dongles will
> disconnect and be powered off and all connections will go away anyway.
> There is no real chance to keep connections over reboot.
> So I don't see any need for this, but feel free to send in patches for
> it and convince me otherwise.
> 
I will definitly. Give me some time. :-)
> Regards
> 
> Marcel
> 
> 
> 
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> 
-- 
-Milind
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Re: [Bluez-devel] Reboot notifier

[Marcel Holtmann]

Hi Milind,

> The first most useful think is doing module cleanup while rebooting.
> About other things, you will know them more deeply. May be like keeping
> informing user level utilities to do some interesting stuff like.
> Keeping connection settings live post reboot or other.

there is no need for a module cleanup. And unloading of kernel modules
still has to be considered as a race condition.

Once you reset the USB bus for example all USB Bluetooth dongles will
disconnect and be powered off and all connections will go away anyway.
There is no real chance to keep connections over reboot.

So I don't see any need for this, but feel free to send in patches for
it and convince me otherwise.

Regards

Marcel



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Re: [Bluez-devel] Reboot notifier

[Milind Dumbare]

[-- Attachment #1: Type: text/plain, Size: 1508 bytes --]

Hi Marcel,
	I have attached patch for reboot notifier. Any suggestions are
appreciated.

Thanks 
On Wed, 2006-08-02 at 15:32 +0200, Marcel Holtmann wrote:
> Hi Milind,
> 
> > The first most useful think is doing module cleanup while rebooting.
> > About other things, you will know them more deeply. May be like keeping
> > informing user level utilities to do some interesting stuff like.
> > Keeping connection settings live post reboot or other.
> 
> there is no need for a module cleanup. And unloading of kernel modules
> still has to be considered as a race condition.
> 
> Once you reset the USB bus for example all USB Bluetooth dongles will
> disconnect and be powered off and all connections will go away anyway.
> There is no real chance to keep connections over reboot.
> 
> So I don't see any need for this, but feel free to send in patches for
> it and convince me otherwise.
> 
> Regards
> 
> Marcel
> 
> 
> 
> -------------------------------------------------------------------------
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> 
-- 
-Milind
"There is no place like 127.0.0.1"

[-- Attachment #2: blue_reboot.patch --]
[-- Type: text/x-patch, Size: 1779 bytes --]

Singed Off: Milind Dumbare <milind@linsyssoft.com>

 hci_usb.c |   32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

Index: linux-2.6.15-pre3/drivers/bluetooth/hci_usb.c
===================================================================
--- linux-2.6.15-pre3.orig/drivers/bluetooth/hci_usb.c	2006-08-02 08:44:42.000000000 -0500
+++ linux-2.6.15-pre3/drivers/bluetooth/hci_usb.c	2006-08-02 09:15:22.000000000 -0500
@@ -46,6 +46,9 @@
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/skbuff.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+
 
 #include <linux/usb.h>
 
@@ -133,6 +136,13 @@
 	{ }	/* Terminating entry */
 };
 
+static int hci_usb_notify_reboot(struct notifier_block *this,
+		unsigned long code ,void *x);
+
+static struct notifier_block hci_usb_reboot_notifier = {
+		.notifier_call  = hci_usb_notify_reboot,
+	};
+
 static struct _urb *_urb_alloc(int isoc, gfp_t gfp)
 {
 	struct _urb *_urb = kmalloc(sizeof(struct _urb) +
@@ -1053,10 +1063,15 @@
 
 static int __init hci_usb_init(void)
 {
-	int err;
+	int err, ret;
 
 	BT_INFO("HCI USB driver ver %s", VERSION);
 
+	ret = register_reboot_notifier(&hci_usb_reboot_notifier);
+	if(ret) 
+		BT_ERR("Could not register to reboot notifier list");
+	
+		
 	if ((err = usb_register(&hci_usb_driver)) < 0)
 		BT_ERR("Failed to register HCI USB driver");
 
@@ -1068,6 +1083,21 @@
 	usb_deregister(&hci_usb_driver);
 }
 
+static int hci_usb_notify_reboot(struct notifier_block *this,
+		unsigned long event ,void *unused)
+{
+		switch(event) {
+			/*FIXME*/
+		case SYS_RESTART:
+		case SYS_HALT:
+		case SYS_POWER_OFF:
+		default:
+			hci_usb_exit();
+		break;
+		}
+
+		return NOTIFY_DONE;
+}
 module_init(hci_usb_init);
 module_exit(hci_usb_exit);
 

[-- Attachment #3: Type: text/plain, Size: 348 bytes --]

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[-- Attachment #4: Type: text/plain, Size: 164 bytes --]

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Re: [Bluez-devel] Reboot notifier

[Milind Dumbare]

Marcel, 
	I didn't get any reply.

On Wed, 2006-08-02 at 19:51 +0530, Milind Dumbare wrote:
> Hi Marcel,
> 	I have attached patch for reboot notifier. Any suggestions are
> appreciated.
> 
> Thanks 
> On Wed, 2006-08-02 at 15:32 +0200, Marcel Holtmann wrote:
> > Hi Milind,
> > 
> > > The first most useful think is doing module cleanup while rebooting.
> > > About other things, you will know them more deeply. May be like keeping
> > > informing user level utilities to do some interesting stuff like.
> > > Keeping connection settings live post reboot or other.
> > 
> > there is no need for a module cleanup. And unloading of kernel modules
> > still has to be considered as a race condition.
> > 
> > Once you reset the USB bus for example all USB Bluetooth dongles will
> > disconnect and be powered off and all connections will go away anyway.
> > There is no real chance to keep connections over reboot.
> > 
> > So I don't see any need for this, but feel free to send in patches for
> > it and convince me otherwise.
> > 
> > Regards
> > 
> > Marcel
> > 
> > 
> > 
> > -------------------------------------------------------------------------
> > Take Surveys. Earn Cash. Influence the Future of IT
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> > https://lists.sourceforge.net/lists/listinfo/bluez-devel
> > 
> > 
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-- 
-Milind
"There is no place like 127.0.0.1"


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