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From: Gioh Kim <gi-oh.kim@ionos.com>
To: linux-block@vger.kernel.org, linux-doc@vger.kernel.org
Cc: axboe@kernel.dk, akinobu.mita@gmail.com, corbet@lwn.net,
	hch@infradead.org, sagi@grimberg.me, bvanassche@acm.org,
	haris.iqbal@ionos.com, jinpu.wang@ionos.com,
	Md Haris Iqbal <haris.iqbal@cloud.ionos.com>,
	Gioh Kim <gi-oh.kim@ionos.com>
Subject: [PATCHv5 for-next 16/19] block/rnbd-clt: Generate kobject_uevent when the rnbd device state changes
Date: Mon, 19 Apr 2021 09:37:19 +0200
Message-ID: <20210419073722.15351-17-gi-oh.kim@ionos.com> (raw)
In-Reply-To: <20210419073722.15351-1-gi-oh.kim@ionos.com>

From: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>

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>
---
 drivers/block/rnbd/rnbd-clt-sysfs.c | 1 +
 drivers/block/rnbd/rnbd-clt.c       | 9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/block/rnbd/rnbd-clt-sysfs.c b/drivers/block/rnbd/rnbd-clt-sysfs.c
index 2b6305ecfd5f..f3a5a62b2062 100644
--- a/drivers/block/rnbd/rnbd-clt-sysfs.c
+++ b/drivers/block/rnbd/rnbd-clt-sysfs.c
@@ -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;
 }
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index ea98124e8ce9..01f67e08afc3 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -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 @@ static int send_msg_sess_info(struct rnbd_clt_session *sess, enum wait_type wait
 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);
-- 
2.25.1


  parent reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-19  7:37 [PATCHv5 for-next 00/19] Misc update for rnbd Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 01/19] MAINTAINERS: Change maintainer for rnbd module Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 02/19] Documentation/sysfs-block-rnbd: Add descriptions for remap_device and resize Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 03/19] block/rnbd-clt: Remove some arguments from insert_dev_if_not_exists_devpath Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 04/19] block/rnbd-clt: Remove some arguments from rnbd_client_setup_device Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 05/19] block/rnbd-clt: Move add_disk(dev->gd) to rnbd_clt_setup_gen_disk Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 06/19] block/rnbd: Kill rnbd_clt_destroy_default_group Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 07/19] block/rnbd: Kill destroy_device_cb Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 08/19] block/rnbd-clt: Replace {NO_WAIT,WAIT} with RTRS_PERMIT_{WAIT,NOWAIT} Gioh Kim
2021-04-19  7:46   ` Leon Romanovsky
2021-04-19  7:37 ` [PATCHv5 for-next 09/19] block/rnbd-srv: Prevent a deadlock generated by accessing sysfs in parallel Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 10/19] block/rnbd-srv: Remove force_close file after holding a lock Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 11/19] block/rnbd-clt: Improve find_or_create_sess() return check Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 12/19] block/rnbd-clt: Fix missing a memory free when unloading the module Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 13/19] block/rnbd-clt: Support polling mode for IO latency optimization Gioh Kim
2021-04-19  7:47   ` Leon Romanovsky
2021-04-19  7:37 ` [PATCHv5 for-next 14/19] Documentation/ABI/rnbd-clt: Add description for nr_poll_queues Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 15/19] block/rnbd-srv: Remove unused arguments of rnbd_srv_rdma_ev Gioh Kim
2021-04-19  7:47   ` Leon Romanovsky
2021-04-19  7:37 ` Gioh Kim [this message]
2021-04-19  7:37 ` [PATCHv5 for-next 17/19] block/rnbd-clt: Remove max_segment_size Gioh Kim
2021-04-19  7:47   ` Leon Romanovsky
2021-04-19  7:37 ` [PATCHv5 for-next 18/19] block/rnbd-clt-sysfs: Remove copy buffer overlap in rnbd_clt_get_path_name Gioh Kim
2021-04-19  7:37 ` [PATCHv5 for-next 19/19] block/rnbd: Use strscpy instead of strlcpy Gioh Kim
2021-04-19 17:54 ` [PATCHv5 for-next 00/19] Misc update for rnbd Jens Axboe

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