What is my readl device id - BTRFS? Post: 302991679

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Special Forums Hardware What is my readl device id - BTRFS? Post 302991679 by hookedatwalla on Thursday 16th of February 2017 07:58:51 AM

02-16-2017

Registered User

This is an appliance that has its own "kernel".

Code:

Linux nas-B9-43-AA 4.1.21.x86_64.1

but under the hood it's:

Code:

root@nas-B9-43-AA:/# cat /etc/*release
PRETTY_NAME="ReadyNASOS 6.5.1"
NAME="Debian GNU/Linux"
VERSION_ID="7"
VERSION="7 (wheezy)"

---------- Post updated 02-16-17 at 07:58 AM ---------- Previous update was 02-15-17 at 09:58 AM ----------

Hi,
Instead of going to the dentry - inode - superblock - device id.
I get the device Id using the getattr(..) on the dentry.

My solution is taken from the Suse patch in the subject (after alot of google digging).

btrfs: stat(2) and /proc/pid/maps returns different devices - Patchwork

Last edited by rbatte1; 02-15-2017 at 11:06 AM.. Reason: Added CODE tags and corrected spelling

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btrfs-debug-tree

BTRFS-DEBUG-TREE(8)					      System Manager's Manual					       BTRFS-DEBUG-TREE(8)

NAME

       btrfs-debug-tree - dump Btrfs filesystem metadata into stdout.

SYNOPSIS

       btrfs-debug-tree [options] <device>

DESCRIPTION

       btrfs-debug-tree  is used to dump the whole tree of the given device.  This is maybe useful for analyzing filesystem state or inconsistence
       and has a positive educational effect on understanding the internal structure.  device is the device file where the filesystem is stored.

       Options

       -e   print detailed extents info.

       -d   print info of btrfs device and root tree dirs only.

       -r   print info of roots only.

       -b <block_num>
	    print info of the specified block only.

EXIT CODE

       btrfs-debug-tree will return 0 if no error happened.  If any problems happened, 1 will be returned.

AUTHOR

       Written by Shilong Wang and Wenruo Qu.

COPYRIGHT

       Copyright (C) 2013 Fujitsu, Inc.  License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free  to	change	and  redistribute  it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       mkfs.btrfs(8)

															       BTRFS-DEBUG-TREE(8)