filesystem inside a file using loop device.

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Hi All,
         I created a file of 10 MB from /dev/zero using dd command.
Then i associated /dev/loop0 to that file using losetup command. Then
i created an ext2 filesystem above /dev/loop0 using mke2fs command.
Then i mounted the that loop device in a mount point. I entered the
monted directiry and created on file and entered some contents to that
file. Then i came out of the directory. Then i deleted the file i
associated. Then If i go inside the mounted directory, i was able
change the directory and the file was there with the contents i put.

how is that possible when deleted the file itself inside which i
created the ext2 filesystem..?  I was previously thinking that the VFS
reads from the file itself for files and directory info. is it not
like that..? I have even cleared the buffers after i deleted the
file(using sync).

Thanks in advance,
Paraneetharan C

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