07.07.2016 12:43, Wang Shilong пишет: > 'btrfs file du' is a very useful tool to watch my system > file usage information with snapshot aware. > > when trying to run following commands: > [root@localhost btrfs-progs]# btrfs file du / > Total Exclusive Set shared Filename > ERROR: Failed to lookup root id - Inappropriate ioctl for device > ERROR: cannot check space of '/': Unknown error -1 > > and My Filesystem looks like this: > [root@localhost btrfs-progs]# df -Th > Filesystem Type Size Used Avail Use% Mounted on > devtmpfs devtmpfs 16G 0 16G 0% /dev > tmpfs tmpfs 16G 368K 16G 1% /dev/shm > tmpfs tmpfs 16G 1.4M 16G 1% /run > tmpfs tmpfs 16G 0 16G 0% /sys/fs/cgroup > /dev/sda3 btrfs 60G 19G 40G 33% / > tmpfs tmpfs 16G 332K 16G 1% /tmp > /dev/sdc btrfs 2.8T 166G 1.7T 9% /data > /dev/sda2 xfs 2.0G 452M 1.6G 23% /boot > /dev/sda1 vfat 1.9G 11M 1.9G 1% /boot/efi > tmpfs tmpfs 3.2G 24K 3.2G 1% /run/user/1000 > > So I installed Btrfs as my root partition, but boot partition > can be other fs. > > We can Let btrfs tool aware of this is not a btrfs file or > directory and skip those files, so that someone like me > could just run 'btrfs file du /' to scan all btrfs filesystems. > > After patch, it will look like: > Total Exclusive Set shared Filename > 0.00B 0.00B - //root/.bash_logout > 0.00B 0.00B - //root/.bash_profile > 0.00B 0.00B - //root/.bashrc > 0.00B 0.00B - //root/.cshrc > 0.00B 0.00B - //root/.tcshrc >
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