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block/rnbd-clt: Generate kobject_uevent when the rnbd device state changes

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When an RTRS session state changes, the transport layer generates an event
to RNBD. Then RNBD will change the state of the RNBD client device
accordingly.

This commit add kobject_uevent when the RNBD device state changes. With
this udev rules can be configured to react accordingly.

Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Link: https://lore.kernel.org/r/20210419073722.15351-17-gi-oh.kim@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Md Haris Iqbal 2021-04-19 09:37:19 +02:00 committed by Jens Axboe
parent c81cba8551
commit 3ba1c6935c
2 changed files with 9 additions and 1 deletions
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1
drivers/block/rnbd/rnbd-clt-sysfs.c
View File

@ -490,6 +490,7 @@ static int rnbd_clt_add_dev_kobj(struct rnbd_clt_dev *dev)
ret);
kobject_put(&dev->kobj);
}
kobject_uevent(gd_kobj, KOBJ_ONLINE);
return ret;
}

9
drivers/block/rnbd/rnbd-clt.c
View File

@ -110,6 +110,7 @@ static int rnbd_clt_change_capacity(struct rnbd_clt_dev *dev,
static int process_msg_open_rsp(struct rnbd_clt_dev *dev,
struct rnbd_msg_open_rsp *rsp)
{
struct kobject *gd_kobj;
int err = 0;
mutex_lock(&dev->lock);
@ -128,6 +129,8 @@ static int process_msg_open_rsp(struct rnbd_clt_dev *dev,
*/
if (dev->nsectors != nsectors)
rnbd_clt_change_capacity(dev, nsectors);
gd_kobj = &disk_to_dev(dev->gd)->kobj;
kobject_uevent(gd_kobj, KOBJ_ONLINE);
rnbd_clt_info(dev, "Device online, device remapped successfully\n");
}
err = rnbd_clt_set_dev_attr(dev, rsp);
@ -649,14 +652,18 @@ put_iu:
static void set_dev_states_to_disconnected(struct rnbd_clt_session *sess)
{
struct rnbd_clt_dev *dev;
struct kobject *gd_kobj;
mutex_lock(&sess->lock);
list_for_each_entry(dev, &sess->devs_list, list) {
rnbd_clt_err(dev, "Device disconnected.\n");
mutex_lock(&dev->lock);
if (dev->dev_state == DEV_STATE_MAPPED)
if (dev->dev_state == DEV_STATE_MAPPED) {
dev->dev_state = DEV_STATE_MAPPED_DISCONNECTED;
gd_kobj = &disk_to_dev(dev->gd)->kobj;
kobject_uevent(gd_kobj, KOBJ_OFFLINE);
}
mutex_unlock(&dev->lock);
}
mutex_unlock(&sess->lock);