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db5df60f22
'btrfs filesystem show' only used to report rounded human readable size
figures. Therefore the actual figure could have been anywhere within
the rounding limit. GParted also applied a heuristic to snap the file
system size figure to the partition size if the partition size was
within the rounding limit of the reported file system size [1].
btrfs-progs v4.1 added the --raw option to print the figures in bytes
[2][3][4].
# btrfs filesystem show --raw /dev/sdb1
Label: none uuid: 003a619e-856f-4b9c-bd29-4d0ae0296d66
Total devices 2 FS bytes used 178765824
devid 1 size 2147483648 used 239861760 path /dev/sdb1
devid 2 size 2147483648 used 436207616 path /dev/sdc1
Since the oldest supported distributions now use btrfs-progs v4.5.3 and
later (see the distribution End-of-Life table in the previous commit
message), unconditionally use this to get accurate figures.
[1] 7fc16a1b69
Handle btrfs tools rounding of figures (#499202)
[2] btrfs-progs: Allow "filesystem show" command to handle different units
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git/commit/?id=15379fa2257bf937cf7830c0b1b79f2daf5df72c
[3] btrfs-progs: docs: new size options for fi show
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git/commit/?id=81225f11d9ea58590476612e69211113ddb9b943
[4] Btrfs progs release 4.1
https://lore.kernel.org/linux-btrfs/20150622150023.GX6761@twin.jikos.cz/
Closes !105 - Update used btrfs file system commands, new minimum is
btrfs-progs 4.5
61 lines
2 KiB
C++
61 lines
2 KiB
C++
/* Copyright (C) 2009,2010 Luca Bruno <lucab@debian.org>
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* Copyright (C) 2010 Curtis Gedak
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GPARTED_BTRFS_H
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#define GPARTED_BTRFS_H
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#include "FileSystem.h"
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#include "BlockSpecial.h"
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#include "Partition.h"
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namespace GParted
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{
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struct BTRFS_Device
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{
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int devid;
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std::vector<BlockSpecial> members;
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} ;
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class btrfs : public FileSystem
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{
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public:
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FS get_filesystem_support() ;
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void set_used_sectors( Partition & partition ) ;
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bool is_busy( const Glib::ustring & path ) ;
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void read_label( Partition & partition ) ;
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bool write_label( const Partition & partition, OperationDetail & operationdetail ) ;
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void read_uuid( Partition & partition ) ;
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bool write_uuid( const Partition & partition, OperationDetail & operationdetail );
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bool create( const Partition & new_partition, OperationDetail & operationdetail ) ;
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bool resize( const Partition & partition_new, OperationDetail & operationdetail, bool fill_partition );
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bool check_repair( const Partition & partition, OperationDetail & operationdetail ) ;
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static void clear_cache() ;
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static Glib::ustring get_mount_device( const Glib::ustring & path ) ;
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static std::vector<Glib::ustring> get_members( const Glib::ustring & path ) ;
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private:
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static const BTRFS_Device & get_cache_entry( const Glib::ustring & path ) ;
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};
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} //GParted
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#endif /* GPARTED_BTRFS_H */
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