f2fs: fix max orphan inodes calculation

cp_payload is introduced for sit bitmap to support large volume, and it is
just after the block of f2fs_checkpoint + nat bitmap, so the first segment
should include F2FS_CP_PACKS + NR_CURSEG_TYPE + cp_payload + orphan blocks.
However, current max orphan inodes calculation don't consider cp_payload,
this patch fix it by reducing the number of cp_payload from total blocks of
the first segment when calculate max orphan inodes.

Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 7 insertions, 5 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index e9f30abbb6fe..81d6d2f0e8ed 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1104,13 +1104,15 @@ void init_ino_entry_info(struct f2fs_sb_info *sbi)
         }
 
         /*
-         * considering 512 blocks in a segment 8 blocks are needed for cp
-         * and log segment summaries. Remaining blocks are used to keep
-         * orphan entries with the limitation one reserved segment
-         * for cp pack we can have max 1020*504 orphan entries
+         * considering 512 blocks in a segment 8+cp_payload blocks are
+         * needed for cp and log segment summaries. Remaining blocks are
+         * used to keep orphan entries with the limitation one reserved
+         * segment for cp pack we can have max 1020*(504-cp_payload)
+         * orphan entries
          */
         sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
-                        NR_CURSEG_TYPE) * F2FS_ORPHANS_PER_BLOCK;
+                        NR_CURSEG_TYPE - __cp_payload(sbi)) *
+                                F2FS_ORPHANS_PER_BLOCK;
 }
 
 int __init create_checkpoint_caches(void)