SquashFS格式的RootFS重打包

使用unsquashfs -stat命令查看现有RootFS的参数信息:

root@csersoft-vm-ubuntu:/home/csersoft/r18s115# unsquashfs -stat rootfs.bin
Found a valid SQUASHFS 4:0 superblock on rootfs.bin.
Creation or last append time Tue Nov 13 20:25:40 2018
Filesystem size 18340.23 Kbytes (17.91 Mbytes)
Compression lzma
Block size 131072
Filesystem is exportable via NFS
Inodes are compressed
Data is compressed
Fragments are compressed
Always-use-fragments option is not specified
Xattrs are compressed
Duplicates are removed
Number of fragments 166
Number of inodes 2353
Number of ids 1

解包并编辑后,根据上方列出的参数信息(主要是压缩算法、块大小),重新打包RootFS:

root@csersoft-vm-ubuntu:/home/csersoft/r18s115# mksquashfs squashfs-root/ new_rootfs.bin -comp lzma -b 131072
Parallel mksquashfs: Using 4 processors
Creating 4.0 filesystem on new_rootfs.bin, block size 131072.
[===================================================================================================================================================================================|] 1907/1907 100%

Exportable Squashfs 4.0 filesystem, lzma compressed, data block size 131072
	compressed data, compressed metadata, compressed fragments, compressed xattrs
	duplicates are removed
Filesystem size 18339.69 Kbytes (17.91 Mbytes)
	29.82% of uncompressed filesystem size (61496.49 Kbytes)
Inode table size 20621 bytes (20.14 Kbytes)
	22.63% of uncompressed inode table size (91124 bytes)
Directory table size 21824 bytes (21.31 Kbytes)
	40.95% of uncompressed directory table size (53295 bytes)
Xattr table size 65 bytes (0.06 Kbytes)
	81.25% of uncompressed xattr table size (80 bytes)
Number of duplicate files found 33
Number of inodes 2355
Number of files 1607
Number of fragments 166
Number of symbolic links  529
Number of device nodes 5
Number of fifo nodes 0
Number of socket nodes 0
Number of directories 214
Number of ids (unique uids + gids) 1
Number of uids 1
	root (0)
Number of gids 1
	root (0)

 

Print Friendly, PDF & Email

《SquashFS格式的RootFS重打包》有3条留言

留下评论

4 − 1 =

*

此站点使用Akismet来减少垃圾评论。了解我们如何处理您的评论数据

%d 博主赞过: