From: Matteo Croce <mcroce@microsoft.com>
Date: Tue, 13 Jul 2021 01:05:26 +0200
Subject: [PATCH] block: export the diskseq in uevents
Git-commit: 87eb710747126ca6606f064deef93d045486ebbe
Patch-mainline: v5.15-rc1
References: jsc#PED-1183
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@lst.de>
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Tested-by: Luca Boccassi <bluca@debian.org>
Link: https://lore.kernel.org/r/20210712230530.29323-3-mcroce@linux.microsoft.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/genhd.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/block/genhd.c b/block/genhd.c
index ceb08af72c1a..e1b2f898d790 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1092,8 +1092,17 @@ static void disk_release(struct device *dev)
blk_put_queue(disk->queue);
iput(disk->part0->bd_inode); /* frees the 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,
--
2.35.3