/usr/bin/mkfs.erofs

Usage: /usr/bin/mkfs.erofs [OPTIONS] FILE SOURCE(s)
Generate EROFS image (FILE) from SOURCE(s).

General options:
 -V, --version         print the version number of mkfs.erofs and exit
 -h, --help            display this help and exit

 -b#                   set block size to # (# = page size by default)
 -d<0-9>               set output verbosity; 0=quiet, 9=verbose (default=2)
 -x#                   set xattr tolerance to # (< 0, disable xattrs; default 2)
 -zX[,level=Y]         X=compressor (Y=compression level, Z=dictionary size, optional)
    [,dictsize=Z]      alternative compressors can be separated by colons(:)
    [:...]             supported compressors and their option ranges are:
                         lz4
                         lz4hc
                           [,level=<0-12>]		(default=9)
                         deflate
                           [,level=<0-9>]		(default=1)
                           [,dictsize=<dictsize>]	(default=32768, max=32768)
                         zstd
                           [,level=<0-22>]		(default=3)
                           [,dictsize=<dictsize>]	(default=<auto>, max=1048576)
 -C#                    specify the size of compress physical cluster in bytes
 -EX[,...]              X=extended options
 -L volume-label        set the volume label (maximum 15 bytes)
 -m#[:X]                enable metadata compression (# = physical cluster size in bytes;
                                                     X = another compression algorithm for metadata)
 -T#                    specify a fixed UNIX timestamp # as build time
    --all-time          the timestamp is also applied to all files (default)
    --mkfs-time         the timestamp is applied as build time only
 -UX                    use a given filesystem UUID
 --zD[=<0|1>]           specify directory compression: 0=disable [default], 1=enable
 --MZ[=<0|[id]>]        put inode metadata ('i') and/or directory data ('d') into the separate metadata zone.
 --all-root             make all files owned by root
 --async-queue-limit=#  specify the maximum number of entries in the multi-threaded job queue
 --blobdev=X            specify an extra device X to store chunked data
 --chunksize=#          generate chunk-based files with #-byte chunks
 --clean=X              run full clean build (default) or:
 --incremental=X        run incremental build
                        X = data|rvsp|0 (data: full data, rvsp: space fallocated
                                         0: inodes zeroed)
 --compress-hints=X     specify a file to configure per-file compression strategy
 --dsunit=#             align all data block addresses to multiples of #
 --exclude-path=X       avoid including file X (X = exact literal path)
 --exclude-regex=X      avoid including files that match X (X = regular expression)
 --force-uid=#          set all file uids to # (# = UID)
 --force-gid=#          set all file gids to # (# = GID)
 --fsalignblks=#        specify the alignment of the primary device size in blocks
 --uid-offset=#         add offset # to all file uids (# = id offset)
 --gid-offset=#         add offset # to all file gids (# = id offset)
 --hard-dereference     dereference hardlinks, add links as separate inodes
 --ignore-mtime         use build time instead of strict per-file modification time
 --max-extent-bytes=#   set maximum decompressed extent size # in bytes
 --mount-point=X        X=prefix of target fs path (default: /)
 --preserve-mtime       keep per-file modification time strictly
 --offset=#             skip # bytes at the beginning of IMAGE.
 --root-xattr-isize=#   ensure the inline xattr size of the root directory is # bytes at least
 --aufs                 replace aufs special files with overlayfs metadata
 --sort=<path,none>     data sorting order for tarballs as input (default: path)
 --tar=X                generate a full or index-only image from a tarball(-ish) source
                        (X = f|i|headerball; f=full mode, i=index mode,
                                             headerball=file data is omitted in the source stream)
 --ovlfs-strip=<0,1>    strip overlayfs metadata in the target image (e.g. whiteouts)
 --quiet                quiet execution (do not write anything to standard output.)
 --ungzip[=X]           try to filter the tarball stream through gzip
                        (and optionally dump the raw stream to X together)
 --gzinfo[=X]           generate AWS SOCI-compatible zinfo in order to support random gzip access
 --vmdk-desc=X          generate a VMDK descriptor file to merge sub-filesystems
 --workers=#            set the number of worker threads to # (default: 64)
 --xattr-inode-digest=X specify extended attribute name X ("erofs.fingerprint.v1" if omitted) to record inode digests
 --xattr-prefix=X       X=extra xattr name prefix
 --zfeature-bits=#      toggle filesystem compression features according to given bits #