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btrfs: check for btrfs in on_add_hook and activate

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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller
2021-06-24 10:45:55 +02:00
committed by Thomas Lamprecht
parent 5d65bf5f12
commit f6abd82a6d
1 changed files with 23 additions and 1 deletions
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24
PVE/Storage/BTRFSPlugin.pm
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@ -20,6 +20,7 @@ use constant {
FS_NOCOW_FL => 0x00800000,
FS_IOC_GETFLAGS => 0x40086602,
FS_IOC_SETFLAGS => 0x80086601,
BTRFS_MAGIC => 0x9123683e,
};
# Configuration (similar to DirPlugin)
@ -89,9 +90,30 @@ sub check_config {
return PVE::Storage::DirPlugin::check_config($self, $sectionId, $config, $create, $skipSchemaCheck);
}
my sub getfsmagic($) {
my ($path) = @_;
# The field type sizes in `struct statfs` are defined in a rather annoying way, and we only
# need the first field, which is a `long` for our supported platforms.
# Should be moved to pve-rs, so this can be the problem of the `libc` crate ;-)
# Just round up and extract what we need:
my $buf = pack('x160');
if (0 != syscall(&PVE::Syscall::SYS_statfs, $path, $buf)) {
die "statfs on '$path' failed - $!\n";
}
return unpack('L!', $buf);
}
my sub assert_btrfs($) {
my ($path) = @_;
die "'$path' is not a btrfs file system\n"
if getfsmagic($path) != BTRFS_MAGIC;
}
sub activate_storage {
my ($class, $storeid, $scfg, $cache) = @_;
return PVE::Storage::DirPlugin::activate_storage($class, $storeid, $scfg, $cache);
PVE::Storage::DirPlugin::activate_storage($class, $storeid, $scfg, $cache);
assert_btrfs($scfg->{path});
}
sub status {