def3ae83da
A backing file struct stores two path's, one "real" path that is referring to f_inode and one "fake" path, which should be displayed to users in /proc/<pid>/maps. There is a lot more potential code that needs to know the "real" path, then code that needs to know the "fake" path. Instead of code having to request the "real" path with file_real_path(), store the "real" path in f_path and require code that needs to know the "fake" path request it with file_user_path(). Replace the file_real_path() helper with a simple const accessor f_path(). After this change, file_dentry() is not expected to observe any files with overlayfs f_path and real f_inode, so the call to ->d_real() should not be needed. Leave the ->d_real() call for now and add an assertion in ovl_d_real() to catch if we made wrong assumptions. Suggested-by: Miklos Szeredi <miklos@szeredi.hu> Link: https://lore.kernel.org/r/CAJfpegtt48eXhhjDFA1ojcHPNKj3Go6joryCPtEFAKpocyBsnw@mail.gmail.com/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Link: https://lore.kernel.org/r/20231009153712.1566422-4-amir73il@gmail.com Signed-off-by: Christian Brauner <brauner@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.