[Xen-devel] [PATCH] blkfront: add uevent for size change

[Marc Olson <marcolso@xxxxxxxxxx>]

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.

Signed-off-by: Marc Olson <marcolso@xxxxxxxxxx>
---
 drivers/block/xen-blkfront.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 2fee2ee..66abf9c 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1996,6 +1996,7 @@ 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;
 
        switch (info->connected) {
@@ -2012,6 +2013,8 @@ 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:
-- 
2.7.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel