tree a9fb3e5b47d09bba0d1c4c565709231fd7906b24
parent 71193c97afbb4dc1bff5c64bd6258d9c51dd1777
author Rob Clark <robdclark@gmail.com> 1504977355 -0400
committer Tom Rini <trini@konsulko.com> 1505480591 -0400

fs: add fs_readdir()

Needed to support efi file protocol.  The fallback.efi loader wants
to be able to read the contents of the /EFI directory to find an OS
to boot.

Modelled after POSIX opendir()/readdir()/closedir().  Unlike the other
fs APIs, this is stateful (ie. state is held in the FS_DIR "directory
stream"), to avoid re-traversing of the directory structure at each
step.  The directory stream must be released with closedir() when it
is no longer needed.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Łukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>