f2fs: introduce FITRIM in f2fs_ioctl

This patch introduces FITRIM in f2fs_ioctl.
In this case, f2fs will issue small discards and prefree discards as many as
possible for the given area.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index efc530cb74a9..4abf0ba01525 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -997,7 +997,7 @@ void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 
         mutex_lock(&sbi->cp_mutex);
 
-        if (!sbi->s_dirty)
+        if (!sbi->s_dirty && cpc->reason != CP_DISCARD)
                 goto out;
         if (unlikely(f2fs_cp_error(sbi)))
                 goto out;
@@ -1020,7 +1020,7 @@ void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 
         /* write cached NAT/SIT entries to NAT/SIT area */
         flush_nat_entries(sbi);
-        flush_sit_entries(sbi);
+        flush_sit_entries(sbi, cpc);
 
         /* unlock all the fs_lock[] in do_checkpoint() */
         do_checkpoint(sbi, cpc);