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Commit 80d34810 authored by Amir Goldstein's avatar Amir Goldstein Committed by Miklos Szeredi
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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: 9e142c41 ("ovl: add ovl_fiemap()")
Signed-off-by: default avatarAmir Goldstein <amir73il@gmail.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 5b394b2d

fs/overlayfs/inode.c

+4 −0
Original line number Diff line number Diff line
@@ -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);