87b3197d81
The option "--clear-space-cache" is not really that suitable for "btrfs check" group, as there are some concerns: - Allowing transid mismatch - No leaf item checks Thoe behaviour are inherited from the default open ctree flags for "btrfs check", which can be unsafe if the end user just wants to clear the cache. - Unclear if the cache clearing would happen along with repair Thankfully the clearing of space cache is done without any repair Thus there is a proposal to move space cache removal to rescue group, and this patch would do that exactly. However this would lead to some behavior changes: - Transid mismatch would be treated as error - Leaf items size/offset would still be checked If we hit any above error, we should just abort without doing any write. These change would increase the safety of the space cache removal, thus I believe it's worthy to introduce such behavior change. Since we're here, also add a small explanation on why we need this dedicated tool to clear space cache (especially for v1 cache). Issue: #698 Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
173 lines
3.5 KiB
Plaintext
173 lines
3.5 KiB
Plaintext
# original by Alfredo Esteban <aedelatorre at xxxxxxxxx>
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# (http://www.spinics.net/lists/linux-btrfs/msg15899.html)
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# edited by Joseph Wang <joequant at gmail.com>
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# (http://lists.alioth.debian.org/pipermail/bash-completion-devel/2013-June/004868.html)
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# edited by John C F <john.ch.fr at gmail.com> on 2015-02-02
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_btrfs_mnts()
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{
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local MNTS
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MNTS=''
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while read mnt; do MNTS+="$mnt "
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done < <(mount -t btrfs | awk '{print $3}')
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COMPREPLY+=( $( compgen -W "$MNTS" -- "$cur" ) )
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}
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_btrfs()
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{
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local cur prev words cword
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_init_completion || return
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COMPREPLY=()
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local cmd=${words[1]}
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commands='subvolume filesystem balance device scrub check rescue restore inspect-internal property send receive quota qgroup replace help version'
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commands_subvolume='create delete list snapshot find-new get-default set-default show sync'
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commands_filesystem='defragment sync resize show df du label usage mkswapfile'
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commands_balance='start pause cancel resume status'
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commands_device='scan add delete remove ready stats usage'
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commands_scrub='start cancel resume status'
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commands_rescue='chunk-recover super-recover zero-log fix-device-size create-control-device clear-uuid-tree clear-ino-cache clear-space-cache'
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commands_inspect_internal='inode-resolve logical-resolve subvolid-resolve rootid min-dev-size dump-tree dump-super tree-stats map-swapfile'
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commands_property='get set list'
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commands_quota='enable disable rescan'
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commands_qgroup='assign remove create destroy show limit clear-stale'
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commands_replace='start status cancel'
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if [[ "$cur" == -* && $cword -le 3 && "$cmd" != "help" ]]; then
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COMPREPLY=( $( compgen -W '--help' -- "$cur" ) )
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return 0
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fi
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if [[ $cword -eq 1 ]]; then
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COMPREPLY=( $( compgen -W "$commands" -- "$cur" ) )
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return 0
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elif [[ $cword -eq 2 ]]; then
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case $cmd in
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subvolume)
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opts="$commands_subvolume"
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;;
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filesystem)
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opts="$commands_filesystem"
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;;
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balance)
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opts="$commands_balance"
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;;
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device)
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opts="$commands_device"
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;;
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scrub)
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opts="$commands_scrub"
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;;
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check)
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_filedir
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return 0
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;;
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rescue)
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opts="$commands_rescue"
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;;
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restore)
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_filedir
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return 0
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;;
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inspect-internal)
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opts="$commands_inspect_internal"
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;;
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property)
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opts="$commands_property"
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;;
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send|receive)
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_filedir -d
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return 0
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;;
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quota)
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opts="$commands_quota"
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;;
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qgroup)
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opts="$commands_qgroup"
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;;
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replace)
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opts="$commands_replace"
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;;
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help)
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opts="--full"
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;;
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version)
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return 0
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;;
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esac
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COMPREPLY=( $( compgen -W "$opts" -- "$cur" ) )
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return 0
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elif [[ $cword -eq 3 ]]; then
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case $cmd in
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filesystem)
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case $prev in
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du|defragment)
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_filedir
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return 0
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;;
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df|usage)
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_btrfs_mnts
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return 0
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;;
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label)
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_btrfs_mnts
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_filedir
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return 0
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;;
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esac
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;;
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device|rescue)
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_filedir
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return 0
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;;
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inspect-internal)
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case $prev in
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min-dev-size)
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_btrfs_mnts
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return 0
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;;
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dump-tree|dump-super|rootid|inode-resolve)
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_filedir
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return 0
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;;
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esac
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;;
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receive)
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case $prev in
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-f)
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_filedir
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return 0
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;;
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esac
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;;
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replace)
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case $prev in
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status|cancel)
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_btrfs_mnts
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return 0
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;;
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start)
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_filedir
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return 0
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;;
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esac
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;;
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subvolume)
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case $prev in
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list)
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_btrfs_mnts
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return 0
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;;
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esac
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;;
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esac
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fi
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_filedir -d
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return 0
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}
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complete -F _btrfs btrfs
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