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>
Subject: [PATCH -next 2/5] block: add ioctl to read the disk sequence number
Date: Mon, 15 Mar 2021 21:02:39 +0100 [thread overview]
Message-ID: <20210315200242.67355-3-mcroce@linux.microsoft.com> (raw)
In-Reply-To: <20210315200242.67355-1-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.
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 ff241e663c01..266315d00942 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -467,6 +467,8 @@ 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 f44eb0a04afd..5dc72bbdd9b7 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: 130-131 are reserved for zoned block devices
* (see uapi/linux/blkzoned.h)
--
2.30.2
next prev parent reply other threads:[~2021-03-15 20:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 20:02 [PATCH -next 0/5] block: add a sequence number to disks Matteo Croce
2021-03-15 20:02 ` [PATCH -next 1/5] block: add disk sequence number Matteo Croce
2021-03-15 20:18 ` Matthew Wilcox
2021-03-15 21:04 ` Matthew Wilcox
2021-03-15 21:32 ` Lennart Poettering
2021-03-25 17:29 ` Matteo Croce
2021-03-26 8:00 ` Hannes Reinecke
2021-03-25 20:58 ` Lennart Poettering
2021-03-16 14:13 ` Christoph Hellwig
2021-04-20 20:12 ` Lennart Poettering
2021-03-25 20:52 ` Lennart Poettering
2021-03-16 1:44 ` JeffleXu
2021-03-23 17:43 ` Matteo Croce
2021-03-15 20:02 ` Matteo Croce [this message]
2021-03-15 20:13 ` [PATCH -next 2/5] block: add ioctl to read the " Matthew Wilcox
2021-03-15 20:17 ` Damien Le Moal
2021-03-15 20:34 ` Matteo Croce
2021-03-15 20:02 ` [PATCH -next 3/5] block: refactor sysfs code Matteo Croce
2021-03-15 20:02 ` [PATCH -next 4/5] block: export diskseq in sysfs Matteo Croce
2021-03-15 20:02 ` [PATCH -next 5/5] loop: increment sequence number Matteo Croce
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