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btrbk
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WIP btrbk: run btrfs commands with ionice 

Add `ionice` command in front of all btrfs commands if either
`ionice_class` or `ionice_level` is set.

KNOWN BUGS:

 - puts `ionice` in front of sudo if backend=btrbk-progs-sudo is set.

 - probably makes only sense for `btrfs send` and `btrfs receive`
   operations.

Example:

    target send-receive /tmp/btrbk/mnt_target/
      ionice_class 1
      ionice_level 0
ionice
Axel Burri 2022-10-19 13:04:35 +02:00
parent dcee6222be
commit bf36028967
1 changed files with 15 additions and 1 deletions
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@ -140,6 +140,13 @@ my %config_options = (
backend_remote => { default => undef, accept => [qw( no btrfs-progs btrfs-progs-btrbk btrfs-progs-sudo btrfs-progs-doas )] }, backend_remote => { default => undef, accept => [qw( no btrfs-progs btrfs-progs-btrbk btrfs-progs-sudo btrfs-progs-doas )] },
backend_local_user => { default => undef, accept => [qw( no btrfs-progs btrfs-progs-btrbk btrfs-progs-sudo btrfs-progs-doas )] }, backend_local_user => { default => undef, accept => [qw( no btrfs-progs btrfs-progs-btrbk btrfs-progs-sudo btrfs-progs-doas )] },
ionice_class => { default => undef, accept => [ qw( no ), (0..3) ] },
ionice_class_local => { default => undef, accept => [ qw( no ), (0..3) ] },
ionice_class_remote => { default => undef, accept => [ qw( no ), (0..3) ] },
ionice_level => { default => undef, accept => [ qw( no ), (0..7) ] },
ionice_level_local => { default => undef, accept => [ qw( no ), (0..7) ] },
ionice_level_remote => { default => undef, accept => [ qw( no ), (0..7) ] },
compat => { default => undef, accept => [qw( no busybox ignore_receive_errors )], split => 1 }, compat => { default => undef, accept => [qw( no busybox ignore_receive_errors )], split => 1 },
compat_local => { default => undef, accept => [qw( no busybox ignore_receive_errors )], split => 1 }, compat_local => { default => undef, accept => [qw( no busybox ignore_receive_errors )], split => 1 },
compat_remote => { default => undef, accept => [qw( no busybox ignore_receive_errors )], split => 1 }, compat_remote => { default => undef, accept => [qw( no busybox ignore_receive_errors )], split => 1 },
@ -2758,7 +2765,14 @@ sub vinfo_cmd($$@)
my @cmd_args = @_; my @cmd_args = @_;
my $backend = config_key_lru($vinfo, "backend") // die; my $backend = config_key_lru($vinfo, "backend") // die;
my $cmd_mapped = $backend_cmd_map{$backend}{$cmd} // [ split(" ", $cmd) ]; my $cmd_mapped = $backend_cmd_map{$backend}{$cmd} // [ split(" ", $cmd) ];
return [ @$cmd_mapped, @cmd_args ]; my @ionice;
my $ionice_class = config_key_lru($vinfo, "ionice_class");
my $ionice_level = config_key_lru($vinfo, "ionice_level");
push @ionice, "-c", $ionice_class if $ionice_class;
push @ionice, "-n", $ionice_level if $ionice_level;
unshift @ionice, "ionice" if @ionice;
return [ @ionice, @$cmd_mapped, @cmd_args ];
} }
sub _get_btrbk_date(@) sub _get_btrbk_date(@)