f2fs: check if inode state is dirty at fsync

If inode state is dirty, go straight to write.

Suggested-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 19 insertions, 6 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b6f3fbf2a376..0b9700216303 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -138,6 +138,17 @@ static inline bool need_do_checkpoint(struct inode *inode)
         return need_cp;
 }
 
+static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
+{
+        struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
+        bool ret = false;
+        /* But we need to avoid that there are some inode updates */
+        if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
+                ret = true;
+        f2fs_put_page(i, 0);
+        return ret;
+}
+
 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = file->f_mapping->host;
@@ -168,19 +179,21 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
                 return ret;
         }
 
+        /* if the inode is dirty, let's recover all the time */
+        if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) {
+                update_inode_page(inode);
+                goto go_write;
+        }
+
         /*
          * if there is no written data, don't waste time to write recovery info.
          */
         if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
                         !exist_written_data(sbi, ino, APPEND_INO)) {
-                struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
 
-                /* But we need to avoid that there are some inode updates */
-                if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) {
-                        f2fs_put_page(i, 0);
+                /* it may call write_inode just prior to fsync */
+                if (need_inode_page_update(sbi, ino))
                         goto go_write;
-                }
-                f2fs_put_page(i, 0);
 
                 if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
                                 exist_written_data(sbi, ino, UPDATE_INO))