util: Introduce md_get_array_info()

Remove most direct ioctl calls for GET_ARRAY_INFO, except for one,
which will be addressed in the next patch.

This is the start of the effort to clean up the use of ioctl calls and
introduce a more structured API, which will use sysfs and fall back to
ioctl for backup.

Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/mdadm.h b/mdadm.h
index dbf1f92..7770585 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1405,6 +1405,7 @@ extern int Restore_metadata(char *dev, char *dir, struct context *c,
 			    struct supertype *st, int only);
 
 extern int md_get_version(int fd);
+int md_get_array_info(int fd, struct mdu_array_info_s *array);
 extern int get_linux_version(void);
 extern int mdadm_version(char *version);
 extern unsigned long long parse_size(char *size);