From 80d34810815b1d708e3e59901a2afcdbd90c2a6f Mon Sep 17 00:00:00 2001 From: Amir Goldstein Date: Mon, 27 Aug 2018 15:55:59 +0300 Subject: ovl: respect FIEMAP_FLAG_SYNC flag Stacked overlayfs fiemap operation broke xfstests that test delayed allocation (with "_test_generic_punch -d"), because ovl_fiemap() failed to write dirty pages when requested. Fixes: 9e142c4102db ("ovl: add ovl_fiemap()") Signed-off-by: Amir Goldstein Signed-off-by: Miklos Szeredi --- fs/overlayfs/inode.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'fs/overlayfs/inode.c') diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index e0bb217c01e2..5014749fd4b4 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -467,6 +467,10 @@ static int ovl_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, return -EOPNOTSUPP; old_cred = ovl_override_creds(inode->i_sb); + + if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC) + filemap_write_and_wait(realinode->i_mapping); + err = realinode->i_op->fiemap(realinode, fieinfo, start, len); revert_creds(old_cred); -- cgit v1.2.1