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block: export the diskseq in uevents 

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>
This commit is contained in:
Matteo Croce 2021-07-13 01:05:26 +02:00 committed by Jens Axboe
parent cf17994855
commit 87eb710747
1 changed files with 9 additions and 0 deletions
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9
block/genhd.c
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@ -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,