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nixos/generate-config: Support detecting nested subvolumes

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This commit is contained in:
William A. Kennington III 2014-08-30 15:33:44 -07:00
parent 0b66483c9a
commit 7fae423522
1 changed files with 16 additions and 6 deletions
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22
nixos/modules/installer/tools/nixos-generate-config.pl
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@ -346,15 +346,25 @@ EOF
# Is this a btrfs filesystem?
if ($fsType eq "btrfs") {
my ($status, @info) = runCommand("btrfs subvol show $rootDir$mountPoint");
my ($status, @id_info) = runCommand("btrfs subvol show $rootDir$mountPoint");
if ($status != 0) {
die "Failed to retreive subvolume info for $mountPoint";
die "Failed to retreive subvolume info for $mountPoint\n";
}
my @subvols = join("", @info) =~ m/Name:[ \t\n]*([^ \t\n]*)/;
if ($#subvols > 0) {
my @ids = join("", @id_info) =~ m/Object ID:[ \t\n]*([^ \t\n]*)/;
if ($#ids > 0) {
die "Btrfs subvol name for $mountPoint listed multiple times in mount\n"
} elsif ($#subvols == 0) {
push @extraOptions, "subvol=$subvols[0]";
} elsif ($#ids == 0) {
my ($status, @path_info) = runCommand("btrfs subvol list $rootDir$mountPoint");
if ($status != 0) {
die "Failed to find $mountPoint subvolume id from btrfs\n";
}
my @paths = join("", @path_info) =~ m/ID $ids[0] [^\n]* path ([^\n]*)/;
if ($#paths > 0) {
die "Btrfs returned multiple paths for a single subvolume id, mountpoint $mountPoint\n";
} elsif ($#paths != 0) {
die "Btrfs did not return a path for the subvolume at $mountPoint\n";
}
push @extraOptions, "subvol=$paths[0]";
}
}