On Sat, Jun 04, 2016 at 07:53:21PM +0100, Salah Triki wrote: > As VFS expects, i_count field is incremented when the named inode is found.
VFS expects no such thing. Incidentally, you have neither bothered to check other filesystems nor cared to look at fs/inode.c. OK, suppose you have found a huge multi-filesystem bug - such things happen from time to time. But you have not even bothered to test your conjecture; this "fix" had never been tried or even compiled. What actually happens is that iget_locked() acquires a reference to inode. That reference is either dropped by iget_failed() (called by befs_iget() in case of failure to read and initialized the sucker) or used up by d_add() as a reference to hold dentry->d_inode. Similar situation holds for other filesystems; they do not need to manipulate i_count at all.
