vorteil/vorteil

package imagetools

/**
 * SPDX-License-Identifier: Apache-2.0
 * Copyright 2020 vorteil.io Pty Ltd
 */

import (
    "time"

    "github.com/vorteil/vorteil/pkg/vdecompiler"
    "github.com/vorteil/vorteil/pkg/vimg"
)

// FSFileReport : Contains information that summarizes a file-systems metadata
type FSFileReport struct {
    FirstLBA        int
    LastLBA         int
    Type            string
    BlockSize       int
    BlocksAllocated int
    BlocksAvaliable int
    BlockGroups     int
    MaxBlock        int
    InodesAllocated int
    InodesAvaliable int
    MaxInodes       int
    LastMountTime   time.Time
    LastWriteTime   time.Time
}

// FSImageFile Returns a summary of a vorteil image's file-system's metadata
func FSImageFile(vorteilImage *vdecompiler.IO) (FSFileReport, error) {
    var fsOut FSFileReport

    entry, err := vorteilImage.GPTEntry(vdecompiler.UTF16toString(vimg.RootPartitionName))
    if err != nil {
        return fsOut, err
    }

    sb, err := vorteilImage.Superblock(0)
    if err != nil {
        return fsOut, err
    }

    fsOut.FirstLBA = int(entry.FirstLBA)
    fsOut.LastLBA = int(entry.LastLBA)
    fsOut.Type = "ext2"
    fsOut.BlockSize = 1024 << int(sb.BlockSize)
    fsOut.BlocksAllocated = int(sb.TotalBlocks - sb.UnallocatedBlocks)
    fsOut.BlocksAvaliable = int(sb.TotalBlocks)
    fsOut.BlockGroups = int((sb.TotalBlocks + sb.BlocksPerGroup - 1) / sb.BlocksPerGroup)
    fsOut.MaxBlock = int(sb.BlocksPerGroup)
    fsOut.InodesAllocated = int(sb.TotalInodes - sb.UnallocatedInodes)
    fsOut.InodesAvaliable = int(sb.TotalInodes)
    fsOut.MaxInodes = int(sb.InodesPerGroup)
    fsOut.LastMountTime = time.Unix(int64(sb.LastMountTime), 0)
    fsOut.LastWriteTime = time.Unix(int64(sb.LastWrittenTime), 0)

    return fsOut, nil
}