mkfs.f2fs: export get_best_overprovision
This patch exports get_best_overprovision() function.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
index 6fd4c80..bbdeb51 100644
--- a/include/f2fs_fs.h
+++ b/include/f2fs_fs.h
@@ -886,4 +886,32 @@
#define ZONE_ALIGN(blks) ALIGN(blks, config.blks_per_seg * \
config.segs_per_zone)
+static inline double get_best_overprovision(struct f2fs_super_block *sb)
+{
+ double reserved, ovp, candidate, end, diff, space;
+ double max_ovp = 0, max_space = 0;
+
+ if (get_sb(segment_count_main) < 256) {
+ candidate = 10;
+ end = 95;
+ diff = 5;
+ } else {
+ candidate = 0.01;
+ end = 10;
+ diff = 0.01;
+ }
+
+ for (; candidate <= end; candidate += diff) {
+ reserved = (2 * (100 / candidate + 1) + 6) *
+ get_sb(segs_per_sec);
+ ovp = (get_sb(segment_count_main) - reserved) * candidate / 100;
+ space = get_sb(segment_count_main) - reserved - ovp;
+ if (max_space < space) {
+ max_space = space;
+ max_ovp = candidate;
+ }
+ }
+ return max_ovp;
+}
+
#endif /*__F2FS_FS_H */
diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
index b0c12f2..c4b17de 100644
--- a/mkfs/f2fs_format.c
+++ b/mkfs/f2fs_format.c
@@ -117,34 +117,6 @@
free(config.extension_list);
}
-static double get_best_overprovision(void)
-{
- double reserved, ovp, candidate, end, diff, space;
- double max_ovp = 0, max_space = 0;
-
- if (get_sb(segment_count_main) < 256) {
- candidate = 10;
- end = 95;
- diff = 5;
- } else {
- candidate = 0.01;
- end = 10;
- diff = 0.01;
- }
-
- for (; candidate <= end; candidate += diff) {
- reserved = (2 * (100 / candidate + 1) + 6) *
- get_sb(segs_per_sec);
- ovp = (get_sb(segment_count_main) - reserved) * candidate / 100;
- space = get_sb(segment_count_main) - reserved - ovp;
- if (max_space < space) {
- max_space = space;
- max_ovp = candidate;
- }
- }
- return max_ovp;
-}
-
static int f2fs_prepare_super_block(void)
{
u_int32_t blk_size_bytes;
@@ -302,7 +274,7 @@
/* Let's determine the best reserved and overprovisioned space */
if (config.overprovision == 0)
- config.overprovision = get_best_overprovision();
+ config.overprovision = get_best_overprovision(sb);
config.reserved_segments =
(2 * (100 / config.overprovision + 1) + 6)
