From: Chao Yu <yuchao0@huawei.com>
Date: Fri, 24 Jul 2020 10:21:36 +0000 (+0800)
Subject: f2fs: compress: fix to update isize when overwriting compressed file
X-Git-Tag: v5.9-rc1~69^2~10
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=944dd22ea4475bd11180fd2f431a4a547ca4d8f5;p=thirdparty%2Fkernel%2Flinux.git

f2fs: compress: fix to update isize when overwriting compressed file

We missed to update isize of compressed file in write_end() with
below case:

cluster size is 16KB

- write 14KB data from offset 0
- overwrite 16KB data from offset 0

Fixes: 4c8ff7095bef ("f2fs: support data compression")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 3b8409ce24f25..bc89bc987513e 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3470,6 +3470,10 @@ static int f2fs_write_end(struct file *file,
 	if (f2fs_compressed_file(inode) && fsdata) {
 		f2fs_compress_write_end(inode, fsdata, page->index, copied);
 		f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+
+		if (pos + copied > i_size_read(inode) &&
+				!f2fs_verity_in_progress(inode))
+			f2fs_i_size_write(inode, pos + copied);
 		return copied;
 	}
 #endif