[PATCH v2] erofs-utils: lib: add erofs_get_configure

[Hongzhen Luo]

This introduces erofs_get_configure() to get the global
configuration `cfg`.  This allows external entities to change
the global configuration through this helper, thereby controlling
the EROFS mkfs process.

It is just a temporary helper for liberofs and it will be
deprecated in the future.

Signed-off-by: Hongzhen Luo <hongzhen at linux.alibaba.com>
---
v2: Update the commit message.
v1: https://lore.kernel.org/all/20240627021005.3896379-1-hongzhen@linux.alibaba.com/
---
 include/erofs/config.h | 3 +++
 lib/config.c           | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/include/erofs/config.h b/include/erofs/config.h
index 3ce8c59..111f5b0 100644
--- a/include/erofs/config.h
+++ b/include/erofs/config.h
@@ -100,6 +100,9 @@ void erofs_init_configure(void);
 void erofs_show_config(void);
 void erofs_exit_configure(void);
 
+/* a temporary helper for updating global configuration */
+struct erofs_configure *erofs_get_configure();
+
 void erofs_set_fs_root(const char *rootdir);
 const char *erofs_fspath(const char *fullpath);
 
diff --git a/lib/config.c b/lib/config.c
index 26f1c35..44f0606 100644
--- a/lib/config.c
+++ b/lib/config.c
@@ -66,6 +66,11 @@ void erofs_exit_configure(void)
 		free(cfg.c_compr_opts[i].alg);
 }
 
+struct erofs_configure *erofs_get_configure()
+{
+	return &cfg;
+}
+
 static unsigned int fullpath_prefix;	/* root directory prefix length */
 
 void erofs_set_fs_root(const char *rootdir)
-- 
2.39.3