Kernel hacking - problem with getting the inode of file.

[apacz]

Hello,
I've got a problem with getting the inode struct which is in file->dentry struct. One way to get the file struct is :

struct file *filep;
filep=filp_open(filename, 0, 0);
        if (IS_ERR(filep))
                return -EIO;

and when i try to play with file with permission like /bin/su (includeing it)
-rws--x--x 1 root bin 35780 Jun 21 21:20 /bin/su*
the i got I/O error.
How to solve it? Maybe there is other way to get the inode struct in kernel when we know only the name of a file?

[apacz]

Ok, i solved like (hope it ll be helpful for others)

        struct nameidata nd;
        int err=0;

        if (path_init([b]filename[/b], LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd))
                err = path_walk(name, &nd);
        if (!err)
                printk(KERN_ALERT "Feel free to use nd.dentry->d_inode :)\n");
        path_release(&nd);