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authorAmir Goldstein <amir73il@gmail.com>2018-08-27 15:55:59 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2018-08-30 17:08:35 +0200
commit80d34810815b1d708e3e59901a2afcdbd90c2a6f (patch)
tree8d20ff41f27c2b86666654cb8cb1b0721ab794fe /fs/overlayfs
parent5b394b2ddf0347bef56e50c69a58773c94343ff3 (diff)
downloadlinux-80d34810815b1d708e3e59901a2afcdbd90c2a6f.tar.bz2
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 <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs')
-rw-r--r--fs/overlayfs/inode.c4
1 files changed, 4 insertions, 0 deletions
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);