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From: Loic Dachary <loic@dachary.org>
To: Ceph Development <ceph-devel@vger.kernel.org>
Subject: /sys/block and /dev and partitions
Date: Sat, 15 Aug 2015 13:16:41 +0200	[thread overview]
Message-ID: <55CF1F99.5050807@dachary.org> (raw)

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Hi,

Is there a portable and consistent way to figure out if a given /dev/XXX path (for instance /dev/dm-1) is a partition of a whole device ? Although checking /sys/block/dm-1/dm/name for a number at the end (like mpatha1 or mpatha2) would probably work, it feels like a fragile hack. Looking into /sys/block/dm-1/slaves will lead to /sys/block/dm-1/slaves/dm-0 and we can check that /sys/block/dm-*/subsystem is class/block. But that does not necessarily mean dm-1 is a partition of dm-0, just that it's a slave of dm-0. 

Any idea ?

Cheers
-- 
Loïc Dachary, Artisan Logiciel Libre


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             reply	other threads:[~2015-08-15 11:16 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-15 11:16 Loic Dachary [this message]
2015-08-15 14:28 ` /sys/block and /dev and partitions Sage Weil
2015-08-15 15:35   ` Loic Dachary
2015-08-15 17:42     ` Ilya Dryomov
2015-08-15 20:56       ` Loic Dachary
2015-08-15 22:00         ` Ilya Dryomov
2015-08-15 22:10           ` Loic Dachary
2015-08-17 21:46             ` Loic Dachary
2015-08-18  9:53               ` Ilya Dryomov
2015-08-18 10:13                 ` Loic Dachary

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