bread will get you the block in the buffer head and returns the same. If you want to understand the whole operation follow do_generic_read_file()->generic_read_file()-> filesystem specific getblk -> getblk()-> bread I hope this helps Thanks, Sumit ----- Original Message ----- From: Charles Johnson <cjnaj1@attbi.com> Date: Friday, April 19, 2002 0:48 am Subject: VFS Question > I'm attempting to design a file system which in reality is just a > filter on > top of ext2 or whatever is below it. It is somewhat similar to > when you use > the loop device to mount a DOS or CD file system which encapulated > within a > normal file. > > So I've go it so that I can use the loop device to be the block > device to the > file. So my question is, what is the proper APIs to use to read > the data out > of the file ?? The sb_read(), bread(), brelse() APIs ?? (The > block cache > APIs) > > Thanks. > > Charlie Johnson > cjnaj1@attbi.com > > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > >
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