From: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Date: Fri, 12 Dec 2025 11:27:48 +0000 (+0300)
Subject: fs/ntfs3: drop preallocated clusters for sparse and compressed files
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3a6aba7f3cf2b46816e08548c254d98de9c74eba;p=thirdparty%2Fkernel%2Flinux.git

fs/ntfs3: drop preallocated clusters for sparse and compressed files

Do not keep preallocated clusters for sparsed and compressed files.
Preserving preallocation in these cases causes fsx failures when running
with sparse files and preallocation enabled.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
---

diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
index c45880ab2391..0cd15a0983fe 100644
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -448,8 +448,10 @@ again:
 
 	is_ext = is_attr_ext(attr_b);
 	align = sbi->cluster_size;
-	if (is_ext)
+	if (is_ext) {
 		align <<= attr_b->nres.c_unit;
+		keep_prealloc = false;
+	}
 
 	old_valid = le64_to_cpu(attr_b->nres.valid_size);
 	old_size = le64_to_cpu(attr_b->nres.data_size);