[PATCH v2 5/6] block: increment sequence number

From: Matteo Croce
Date: Thu May 20 2021 - 10:00:46 EST


From: Matteo Croce <mcroce@xxxxxxxxxxxxx>

Increment the disk sequence number when the media has changed,
i.e. on DISK_EVENT_MEDIA_CHANGE event.

$ cat /sys/class/block/sr0/diskseq
12
$ eject
$ cat /sys/class/block/sr0/diskseq
22

Signed-off-by: Matteo Croce <mcroce@xxxxxxxxxxxxx>
---
block/genhd.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/block/genhd.c b/block/genhd.c
index 67519c034f9f..5bc6b6c248c4 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1666,6 +1666,9 @@ static void disk_check_events(struct disk_events *ev,

spin_unlock_irq(&ev->lock);

+ if (events & DISK_EVENT_MEDIA_CHANGE)
+ inc_diskseq(disk);
+
/*
* Tell userland about new events. Only the events listed in
* @disk->events are reported, and only if DISK_EVENT_FLAG_UEVENT
--
2.31.1