Add support for LogFS Fillesystem

I'm not sure how to mount it, but since only mkfs.logfs was successful, I'm sharing it just in case. logfs.zip

Apparently, 7a3a8e5cb9d5bf67 is the signature.

LogFS Header (https://android.googlesource.com/kernel/msm/+/android-msm-marlin-3.18-nougat-dr1/fs/logfs/logfs_abi.h)

/**
 * struct logfs_disk_super - on-medium superblock
 *
 * @ds_magic:           magic number, must equal LOGFS_MAGIC

struct logfs_disk_super {
    struct logfs_segment_header ds_sh;
    __be64  ds_magic;

/**
 * struct logfs_segment_header - per-segment header in the ostore
 *
 * @crc:            crc32 of header (there is no data)
 * @pad:            unused, must be 0
 * @type:           segment type, see above
 * @level:          GC level for all objects in this segment
 * @segno:          segment number
 * @ec:             erase count for this segment
 * @gec:            global erase count at time of writing
 */

struct logfs_segment_header {
    __be32  crc;
    __be16  pad;
    __u8    type;
    __u8    level;
    __be32  segno;
    __be32  ec;
    __be64  gec;
};

#define LOGFS_MAGIC     0x7a3a8e5cb9d5bf67ull /* =ds_magic */

ReFirmLabs / binwalk

Add support for LogFS Fillesystem #715