From: Matteo Croce <mcroce@linux.microsoft.com>
To: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Jens Axboe <axboe@kernel.dk>
Cc: linux-kernel@vger.kernel.org,
"Lennart Poettering" <lennart@poettering.net>,
"Luca Boccassi" <bluca@debian.org>,
"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 v3 2/6] block: add ioctl to read the disk sequence number
Date: Wed, 23 Jun 2021 12:58:54 +0200 [thread overview]
Message-ID: <20210623105858.6978-3-mcroce@linux.microsoft.com> (raw)
In-Reply-To: <20210623105858.6978-1-mcroce@linux.microsoft.com>
From: Matteo Croce <mcroce@microsoft.com>
Add a new BLKGETDISKSEQ ioctl which retrieves the disk sequence number
from the genhd structure.
# ./getdiskseq /dev/loop*
/dev/loop0: 13
/dev/loop0p1: 13
/dev/loop0p2: 13
/dev/loop0p3: 13
/dev/loop1: 14
/dev/loop1p1: 14
/dev/loop1p2: 14
/dev/loop2: 5
/dev/loop3: 6
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
---
block/ioctl.c | 2 ++
include/uapi/linux/fs.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/block/ioctl.c b/block/ioctl.c
index 8ba1ed8defd0..32b339bbaf95 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -469,6 +469,8 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
BLKDEV_DISCARD_SECURE);
case BLKZEROOUT:
return blk_ioctl_zeroout(bdev, mode, arg);
+ case BLKGETDISKSEQ:
+ return put_u64(argp, bdev->bd_disk->diskseq);
case BLKREPORTZONE:
return blkdev_report_zones_ioctl(bdev, mode, cmd, arg);
case BLKRESETZONE:
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 4c32e97dcdf0..bdf7b404b3e7 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -184,6 +184,7 @@ struct fsxattr {
#define BLKSECDISCARD _IO(0x12,125)
#define BLKROTATIONAL _IO(0x12,126)
#define BLKZEROOUT _IO(0x12,127)
+#define BLKGETDISKSEQ _IOR(0x12,128,__u64)
/*
* A jump here: 130-136 are reserved for zoned block devices
* (see uapi/linux/blkzoned.h)
--
2.31.1
next prev parent reply other threads:[~2021-06-23 10:59 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-23 10:58 [PATCH v3 0/6] block: add a sequence number to disks Matteo Croce
2021-06-23 10:58 ` [PATCH v3 1/6] block: add disk sequence number Matteo Croce
2021-06-23 11:48 ` Christoph Hellwig
2021-06-23 13:10 ` Matteo Croce
2021-06-23 13:51 ` Lennart Poettering
2021-06-23 14:01 ` Hannes Reinecke
2021-06-23 14:07 ` Luca Boccassi
2021-06-23 14:21 ` Hannes Reinecke
2021-06-23 14:34 ` Luca Boccassi
2021-06-23 14:55 ` Lennart Poettering
2021-06-23 14:12 ` Lennart Poettering
2021-06-23 15:02 ` Hannes Reinecke
2021-06-23 15:34 ` Luca Boccassi
2021-06-23 15:48 ` Lennart Poettering
2021-06-23 14:28 ` Christoph Hellwig
2021-06-23 10:58 ` Matteo Croce [this message]
2021-06-23 10:58 ` [PATCH v3 3/6] block: refactor sysfs code Matteo Croce
2021-06-23 11:52 ` Christoph Hellwig
2021-06-23 19:03 ` Matteo Croce
2021-06-24 6:12 ` Christoph Hellwig
2021-06-23 10:58 ` [PATCH v3 4/6] block: export diskseq in sysfs Matteo Croce
2021-06-23 10:58 ` [PATCH v3 5/6] block: increment sequence number Matteo Croce
2021-06-23 10:58 ` [PATCH v3 6/6] loop: " Matteo Croce
2021-06-23 11:57 ` Christoph Hellwig
2021-06-23 13:13 ` Luca Boccassi
2021-06-23 14:25 ` Christoph Hellwig
2021-06-23 15:29 ` Lennart Poettering
2021-06-24 6:11 ` Christoph Hellwig
2021-06-23 12:03 ` [PATCH v3 0/6] block: add a sequence number to disks Hannes Reinecke
2021-06-23 12:46 ` Luca Boccassi
2021-06-23 14:07 ` Lennart Poettering
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