linux-kernel - [PATCH v2] fs/ntfs3: Keep prealloc for all types of files

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Message-ID: <bb2782a2-d6af-ef7e-2e35-3b1d87a11ff7@paragon-software.com>
Date:   Tue, 5 Oct 2021 18:55:44 +0300
From:   Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To:     <ntfs3@...ts.linux.dev>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
        <kari.argillander@...il.com>
Subject: [PATCH v2] fs/ntfs3: Keep prealloc for all types of files

Before we haven't kept prealloc for sparse files because we thought that
it will speed up create / write operations.
It lead to situation, when user reserved some space for sparse file,
filled volume, and wasn't able to write in reserved file.
With this commit we keep prealloc.
Now xfstest generic/274 pass.
Fixes: be71b5cba2e6 ("fs/ntfs3: Add attrib operations")

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
v2:
  Expanded commit message.

 fs/ntfs3/attrib.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
index 8a00fa978f5f..e8c00dda42ad 100644
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -447,11 +447,8 @@ int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
 again_1:
 	align = sbi->cluster_size;
 
-	if (is_ext) {
+	if (is_ext)
 		align <<= attr_b->nres.c_unit;
-		if (is_attr_sparsed(attr_b))
-			keep_prealloc = false;
-	}
 
 	old_valid = le64_to_cpu(attr_b->nres.valid_size);
 	old_size = le64_to_cpu(attr_b->nres.data_size);
@@ -461,9 +458,6 @@ int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
 	new_alloc = (new_size + align - 1) & ~(u64)(align - 1);
 	new_alen = new_alloc >> cluster_bits;
 
-	if (keep_prealloc && is_ext)
-		keep_prealloc = false;
-
 	if (keep_prealloc && new_size < old_size) {
 		attr_b->nres.data_size = cpu_to_le64(new_size);
 		mi_b->dirty = true;
-- 
2.33.0