Date: Thu, 17 Jan 2008 09:46:00 -0500 From: Adam <urbansnap@gmail.com> To: freebsd-current@freebsd.org Subject: Reading and Writing to Block from di_spare Message-ID: <485228D5-8D0B-4CD5-9FB7-B0D551B172DA@gmail.com>
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Hi, I am working on a project for where I want to take the standard UFS/FFS file system that BSD ships with and add several blocks of information to the dinode. The simplest way of doing it seemed to be to allocate blocks to di_spare. I believe that I have figured out how to do that: ffs_alloc(inode, 0 , 0, (int)(inode->i_fs->fs_bsize), td->td_ucred, &addr); dinode->di_spare[1]=(int64_t)addr; I'm having problems taking that block address and reading/writing to it. As far as I can tell most of the buffer read routines (getblk, bread) seem to be geared toward reading and writing direct and indirect blocks in an inode. How do I read and write a block that is neither a direct nor an indirect block? I apologize in advance if this is has been posted before. I have spent a considerable amount of time searching past posts for the solution. Thanks, Adam
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