1 files changed, 37 insertions, 8 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 7d8b96275092..208f1a9bd569 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -127,12 +127,30 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 		return 0;
 
 	trace_f2fs_sync_file_enter(inode);
+
+	/* if fdatasync is triggered, let's do in-place-update */
+	if (datasync)
+		set_inode_flag(fi, FI_NEED_IPU);
+
 	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	if (datasync)
+		clear_inode_flag(fi, FI_NEED_IPU);
 	if (ret) {
 		trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
 		return ret;
 	}
 
+	/*
+	 * 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, inode->i_ino, APPEND_INO)) {
+		if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
+			exist_written_data(sbi, inode->i_ino, UPDATE_INO))
+			goto flush_out;
+		goto out;
+	}
+
 	/* guarantee free sections for fsync */
 	f2fs_balance_fs(sbi);
 
@@ -188,6 +206,13 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 		ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
 		if (ret)
 			goto out;
+
+		/* once recovery info is written, don't need to tack this */
+		remove_dirty_inode(sbi, inode->i_ino, APPEND_INO);
+		clear_inode_flag(fi, FI_APPEND_WRITE);
+flush_out:
+		remove_dirty_inode(sbi, inode->i_ino, UPDATE_INO);
+		clear_inode_flag(fi, FI_UPDATE_WRITE);
 		ret = f2fs_issue_flush(F2FS_SB(inode->i_sb));
 	}
 out:
@@ -206,8 +231,9 @@ static pgoff_t __get_first_dirty_index(struct address_space *mapping,
 
 	/* find first dirty page index */
 	pagevec_init(&pvec, 0);
-	nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, PAGECACHE_TAG_DIRTY, 1);
-	pgofs = nr_pages ? pvec.pages[0]->index: LONG_MAX;
+	nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
+					PAGECACHE_TAG_DIRTY, 1);
+	pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
 	pagevec_release(&pvec);
 	return pgofs;
 }
@@ -272,8 +298,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
 			}
 		}
 
-		end_offset = IS_INODE(dn.node_page) ?
-			ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK;
+		end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
 
 		/* find data/hole in dnode block */
 		for (; dn.ofs_in_node < end_offset;
@@ -380,13 +405,15 @@ static void truncate_partial_data_page(struct inode *inode, u64 from)
 		return;
 
 	lock_page(page);
-	if (unlikely(page->mapping != inode->i_mapping)) {
-		f2fs_put_page(page, 1);
-		return;
-	}
+	if (unlikely(!PageUptodate(page) ||
+			page->mapping != inode->i_mapping))
+		goto out;
+
 	f2fs_wait_on_page_writeback(page, DATA);
 	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
 	set_page_dirty(page);
+
+out:
 	f2fs_put_page(page, 1);
 }
 
@@ -645,6 +672,8 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
 	loff_t off_start, off_end;
 	int ret = 0;
 
+	f2fs_balance_fs(sbi);
+
 	ret = inode_newsize_ok(inode, (len + offset));
 	if (ret)
 		return ret;