f2fs: open code allocate_segment_by_default

allocate_segment_by_default has just two callers, which use very
different code pathes inside it based on the force paramter.  Just
open code the logic in the two callers using a new helper to decided
if a new segment should be allocated.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/segment.c

@@ -2849,31 +2849,20 @@ static int get_ssr_segment(struct f2fs_sb_info *sbi, int type,
 	return 0;
 }
 
-/*
- * flush out current segment and replace it with new segment
- * This function should be returned with success, otherwise BUG
- */
-static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
-						int type, bool force)
+static bool need_new_seg(struct f2fs_sb_info *sbi, int type)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, type);
 
-	if (force)
-		new_curseg(sbi, type, true);
-	else if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
-					curseg->seg_type == CURSEG_WARM_NODE)
-		new_curseg(sbi, type, false);
-	else if (curseg->alloc_type == LFS &&
-			is_next_segment_free(sbi, curseg, type) &&
-			likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
-		new_curseg(sbi, type, false);
-	else if (f2fs_need_SSR(sbi) &&
-			get_ssr_segment(sbi, type, SSR, 0))
-		change_curseg(sbi, type, true);
-	else
-		new_curseg(sbi, type, false);
-
-	stat_inc_seg_type(sbi, curseg);
+	if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
+	    curseg->seg_type == CURSEG_WARM_NODE)
+		return true;
+	if (curseg->alloc_type == LFS &&
+	    is_next_segment_free(sbi, curseg, type) &&
+	    likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
+		return true;
+	if (!f2fs_need_SSR(sbi) || !get_ssr_segment(sbi, type, SSR, 0))
+		return true;
+	return false;
 }
 
 void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
@@ -2926,7 +2915,8 @@ static void __allocate_new_segment(struct f2fs_sb_info *sbi, int type,
 		return;
 alloc:
 	old_segno = curseg->segno;
-	allocate_segment_by_default(sbi, type, true);
+	new_curseg(sbi, type, true);
+	stat_inc_seg_type(sbi, curseg);
 	locate_dirty_segment(sbi, old_segno);
 }
 
@@ -3276,11 +3266,19 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
 		update_sit_entry(sbi, old_blkaddr, -1);
 
 	if (!__has_curseg_space(sbi, curseg)) {
-		if (from_gc)
+		/*
+		 * Flush out current segment and replace it with new segment.
+		 */
+		if (from_gc) {
 			get_atssr_segment(sbi, type, se->type,
 						AT_SSR, se->mtime);
-		else
-			allocate_segment_by_default(sbi, type, false);
+		} else {
+			if (need_new_seg(sbi, type))
+				new_curseg(sbi, type, false);
+			else
+				change_curseg(sbi, type, true);
+			stat_inc_seg_type(sbi, curseg);
+		}
 	}
 	/*
 	 * segment dirty status should be updated after segment allocation,