2021-09-29 16:40:25

by Konstantin Komarov

[permalink] [raw]
Subject: [PATCH v2] fs/ntfs3: Forbid FALLOC_FL_PUNCH_HOLE for normal files

FALLOC_FL_PUNCH_HOLE isn't allowed with normal files.
Filesystem must remember info about hole, but for normal file
we can only zero it and forget.

Fixes: 4342306f0f0d ("fs/ntfs3: Add file operations and implementation")
Now xfstests generic/016 generic/021 generic/022 pass.

Signed-off-by: Konstantin Komarov <[email protected]>
---
fs/ntfs3/file.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 5fb3508e5422..43b1451bff53 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -587,8 +587,11 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
truncate_pagecache(inode, vbo_down);

if (!is_sparsed(ni) && !is_compressed(ni)) {
- /* Normal file. */
- err = ntfs_zero_range(inode, vbo, end);
+ /*
+ * Normal file, can't make hole.
+ * TODO: Try to find way to save info about hole.
+ */
+ err = -EOPNOTSUPP;
goto out;
}

--
2.33.0