From: Matteo Croce <mcroce@linux.microsoft.com>
To: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
"Lennart Poettering" <lennart@poettering.net>,
"Luca Boccassi" <bluca@debian.org>,
"Jens Axboe" <axboe@kernel.dk>,
"Alexander Viro" <viro@zeniv.linux.org.uk>,
"Damien Le Moal" <damien.lemoal@wdc.com>,
"Tejun Heo" <tj@kernel.org>,
"Javier González" <javier@javigon.com>,
"Niklas Cassel" <niklas.cassel@wdc.com>,
"Johannes Thumshirn" <johannes.thumshirn@wdc.com>,
"Hannes Reinecke" <hare@suse.de>,
"Matthew Wilcox" <willy@infradead.org>,
"Christoph Hellwig" <hch@infradead.org>,
JeffleXu <jefflexu@linux.alibaba.com>
Subject: [PATCH v2 5/6] block: increment sequence number
Date: Thu, 20 May 2021 15:56:21 +0200 [thread overview]
Message-ID: <20210520135622.44625-6-mcroce@linux.microsoft.com> (raw)
In-Reply-To: <20210520135622.44625-1-mcroce@linux.microsoft.com>
From: Matteo Croce <mcroce@microsoft.com>
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@microsoft.com>
---
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
next prev parent reply other threads:[~2021-05-20 13:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-20 13:56 [PATCH v2 0/6] block: add a sequence number to disks Matteo Croce
2021-05-20 13:56 ` [PATCH v2 1/6] block: add disk sequence number Matteo Croce
2021-05-20 13:56 ` [PATCH v2 2/6] block: add ioctl to read the " Matteo Croce
2021-05-20 13:56 ` [PATCH v2 3/6] block: refactor sysfs code Matteo Croce
2021-05-20 13:56 ` [PATCH v2 4/6] block: export diskseq in sysfs Matteo Croce
2021-05-20 13:56 ` Matteo Croce [this message]
2021-05-20 13:56 ` [PATCH v2 6/6] loop: increment sequence number Matteo Croce
2021-06-08 14:31 ` [PATCH v2 0/6] block: add a sequence number to disks Matteo Croce
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