This is a revamp of a my previous patches set[1]. After more than year of attempts these patches were never merged, so I tried to simplify them and to change a bit the focus. The previous patches set had the focus to the disk usage. The aim of these patches now is to show the chunks distribution among the disks. So a new command 'btrfs chunk list' is added:
$ sudo ./btrfs chunk list /mnt/btrfs1/ Data,RAID6: Size:3.00GiB, Used:1.02MiB /dev/vdb 1.00GiB /dev/vdd 1.00GiB /dev/vde 1.00GiB /dev/vdf 1.00GiB /dev/vdg 1.00GiB Metadata,RAID5: Size:1.00GiB, Used:112.00KiB /dev/vdb 256.00MiB /dev/vdd 256.00MiB /dev/vde 256.00MiB /dev/vdf 256.00MiB /dev/vdg 256.00MiB System,RAID1: Size:32.00MiB, Used:16.00KiB /dev/vde 32.00MiB /dev/vdg 32.00MiB Unallocated: /dev/vdb 48.75GiB /dev/vdd 48.75GiB /dev/vde 48.72GiB /dev/vdf 48.75GiB /dev/vdg 48.72GiB This command is smart enough to highlight that a disk is not preset (this happens when a mount -o degraded is used). In case /dev/vdb disappears: $ sudo ./btrfs chunk list /mnt/btrfs1/ Data,RAID6: Size:3.00GiB, Used:1.02MiB /dev/vdb 1.00GiB /dev/vde 1.00GiB /dev/vdf 1.00GiB /dev/vdg 1.00GiB [Missing: /dev/vdd] 1.00GiB Metadata,RAID5: Size:1.00GiB, Used:112.00KiB /dev/vdb 256.00MiB /dev/vde 256.00MiB /dev/vdf 256.00MiB /dev/vdg 256.00MiB [Missing: /dev/vdd] 256.00MiB System,RAID1: Size:32.00MiB, Used:16.00KiB /dev/vde 32.00MiB /dev/vdg 32.00MiB Unallocated: /dev/vdb 48.75GiB /dev/vde 48.72GiB /dev/vdf 48.75GiB /dev/vdg 48.72GiB [Missing: /dev/vdd] 48.75GiB It is interesting to see what happens after a 'btrfs balance': $ sudo ./btrfs chunk list /mnt/btrfs1/ Data,RAID6: Size:2.00GiB, Used:792.00KiB /dev/vdb 1.00GiB /dev/vde 1.00GiB /dev/vdf 1.00GiB /dev/vdg 1.00GiB Metadata,RAID5: Size:1.03GiB, Used:112.00KiB /dev/vdb 352.00MiB /dev/vde 352.00MiB /dev/vdf 352.00MiB /dev/vdg 352.00MiB System,RAID1: Size:32.00MiB, Used:16.00KiB /dev/vdb 32.00MiB /dev/vdf 32.00MiB Unallocated: /dev/vdb 48.63GiB /dev/vde 48.66GiB /dev/vdf 48.63GiB /dev/vdg 48.66GiB [Missing: /dev/vdd] 50.00GiB And what happens after a 'btrfs device delete missing': $ sudo ./btrfs chunk list /mnt/btrfs1/ Data,RAID6: Size:2.00GiB, Used:792.00KiB /dev/vdb 1.00GiB /dev/vde 1.00GiB /dev/vdf 1.00GiB /dev/vdg 1.00GiB Metadata,RAID5: Size:1.03GiB, Used:112.00KiB /dev/vdb 352.00MiB /dev/vde 352.00MiB /dev/vdf 352.00MiB /dev/vdg 352.00MiB System,RAID1: Size:32.00MiB, Used:16.00KiB /dev/vdb 32.00MiB /dev/vdf 32.00MiB Unallocated: /dev/vdb 48.63GiB /dev/vde 48.66GiB /dev/vdf 48.63GiB /dev/vdg 48.66GiB Comments are welcome. BR G.Baroncelli [1] My last attempt was done in http://comments.gmane.org/gmane.comp.file-systems.btrfs/32647, then David resent the patches in http://www.spinics.net/lists/linux-btrfs/msg33630.html -- gpg @keyserver.linux.it: Goffredo Baroncelli <kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
