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authorMarc Olson <marcolso@amazon.com>2017-04-11 22:24:09 +0300
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2017-04-18 18:10:55 +0300
commit89515d0255c918e08aa4085956c79bf17615fda5 (patch)
tree65d4ebcda8ac1811ed7517db7feff02aac009380 /drivers/block/xen-blkfront.c
parenta2c97909f97ef32b76e856572fba4f77e1885fe6 (diff)
downloadlinux-89515d0255c918e08aa4085956c79bf17615fda5.tar.xz
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: Marc Olson <marcolso@amazon.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block/xen-blkfront.c')
-rw-r--r--drivers/block/xen-blkfront.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d137ef8a72be..abed296ce605 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -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: