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Commit 89515d02 authored by Marc Olson's avatar Marc Olson Committed by Konrad Rzeszutek Wilk
Browse files

blkfront: add uevent for size change 



When a blkfront device is resized from dom0, emit a KOBJ_CHANGE uevent to
notify the guest about the change. This allows for custom udev rules, such
as automatically resizing a filesystem, when an event occurs.

With this patch you get these udev

KERNEL[577.206230] change   /devices/vbd-51728/block/xvdb (block)
UDEV  [577.226218] change   /devices/vbd-51728/block/xvdb (block)

Signed-off-by: default avatarMarc Olson <marcolso@amazon.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent a2c97909

drivers/block/xen-blkfront.c

+3 −0
Original line number Diff line number Diff line
@@ -2345,6 +2345,7 @@ static void blkfront_connect(struct blkfront_info *info) 
	unsigned long sector_size;

	unsigned int physical_sector_size;

	unsigned int binfo;

	char *envp[] = { "RESIZE=1", NULL };

	int err, i;



	switch (info->connected) {
@@ -2361,6 +2362,8 @@ static void blkfront_connect(struct blkfront_info *info) 
		       sectors);

		set_capacity(info->gd, sectors);

		revalidate_disk(info->gd);

		kobject_uevent_env(&disk_to_dev(info->gd)->kobj,

				   KOBJ_CHANGE, envp);



		return;

	case BLKIF_STATE_SUSPENDED: