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Message-Id: <20210712230530.29323-3-mcroce@linux.microsoft.com>
Date: Tue, 13 Jul 2021 01:05:26 +0200
From: Matteo Croce <mcroce@...ux.microsoft.com>
To: linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
Jens Axboe <axboe@...nel.dk>,
Christoph Hellwig <hch@...radead.org>
Cc: linux-kernel@...r.kernel.org,
Lennart Poettering <lennart@...ttering.net>,
Luca Boccassi <bluca@...ian.org>,
Alexander Viro <viro@...iv.linux.org.uk>,
Damien Le Moal <damien.lemoal@....com>,
Tejun Heo <tj@...nel.org>,
Javier González <javier@...igon.com>,
Niklas Cassel <niklas.cassel@....com>,
Johannes Thumshirn <johannes.thumshirn@....com>,
Hannes Reinecke <hare@...e.de>,
Matthew Wilcox <willy@...radead.org>,
JeffleXu <jefflexu@...ux.alibaba.com>
Subject: [PATCH v5 2/6] block: export the diskseq in uevents
From: Matteo Croce <mcroce@...rosoft.com>
Export the newly introduced diskseq in uevents:
$ udevadm info /sys/class/block/* |grep -e DEVNAME -e DISKSEQ
E: DEVNAME=/dev/loop0
E: DISKSEQ=1
E: DEVNAME=/dev/loop1
E: DISKSEQ=2
E: DEVNAME=/dev/loop2
E: DISKSEQ=3
E: DEVNAME=/dev/loop3
E: DISKSEQ=4
E: DEVNAME=/dev/loop4
E: DISKSEQ=5
E: DEVNAME=/dev/loop5
E: DISKSEQ=6
E: DEVNAME=/dev/loop6
E: DISKSEQ=7
E: DEVNAME=/dev/loop7
E: DISKSEQ=8
E: DEVNAME=/dev/nvme0n1
E: DISKSEQ=9
E: DEVNAME=/dev/nvme0n1p1
E: DISKSEQ=9
E: DEVNAME=/dev/nvme0n1p2
E: DISKSEQ=9
E: DEVNAME=/dev/nvme0n1p3
E: DISKSEQ=9
E: DEVNAME=/dev/nvme0n1p4
E: DISKSEQ=9
E: DEVNAME=/dev/nvme0n1p5
E: DISKSEQ=9
E: DEVNAME=/dev/sda
E: DISKSEQ=10
E: DEVNAME=/dev/sda1
E: DISKSEQ=10
E: DEVNAME=/dev/sda2
E: DISKSEQ=10
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Matteo Croce <mcroce@...rosoft.com>
---
block/genhd.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/block/genhd.c b/block/genhd.c
index 0be32dbe97bb..3126f8afe3b8 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1101,8 +1101,17 @@ static void disk_release(struct device *dev)
blk_put_queue(disk->queue);
kfree(disk);
}
+
+static int block_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct gendisk *disk = dev_to_disk(dev);
+
+ return add_uevent_var(env, "DISKSEQ=%llu", disk->diskseq);
+}
+
struct class block_class = {
.name = "block",
+ .dev_uevent = block_uevent,
};
static char *block_devnode(struct device *dev, umode_t *mode,
--
2.31.1
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