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Message-ID: <1328719440.33661.YahooMailClassic@web29013.mail.ird.yahoo.com> Date: Wed, 8 Feb 2012 16:44:00 +0000 (GMT) From: Paul Parsons <lost.distance@...oo.com> To: Kay Sievers <kay.sievers@...y.org>, Kirill Smelkov <kirr@....spb.ru> Cc: linux-kernel@...r.kernel.org Subject: Re: No /dev/root with devtmpfs? --- On Wed, 8/2/12, Kirill Smelkov <kirr@....spb.ru> wrote: > "On what disk/partition was / mounted?" is a well-defined > question for > cases when backing store is local hdd, so there should be > well-defined > answer. > > Previously it was /dev/root, but if /dev/root is not good > there should be > some other way for getting the answer. With ext2 I've > switched to > `mountpoint -d /` and then grepping major/minor in > /proc/partitions, but > with major=0 case I suspect this won't work. > > > My use case is to check md5 sum of mbr + bootloader area + > root-partition early right after the boot, to verify whether > software is > not corrupt, and for doing so it was useful to know / -> > root-partition > -> whole block device. It's not tivo, just checking for > medium damage. (I > understand this would be better done in the early bootloader > but that > part is out of my control) Could you simply use /etc/fstab to identify the root partition? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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