Re: [PATCH] fs/ntfs3: check for shutdown in fsync

Re: [PATCH] fs/ntfs3: check for shutdown in fsync

[kernel test robot]

Hi Konstantin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on brauner-vfs/vfs.all]
[also build test WARNING on linus/master v6.18-rc6 next-20251118]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Konstantin-Komarov/fs-ntfs3-check-for-shutdown-in-fsync/20251118-210835
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all
patch link:    https://lore.kernel.org/r/20251118130705.411336-1-almaz.alexandrovich%40paragon-software.com
patch subject: [PATCH] fs/ntfs3: check for shutdown in fsync
config: i386-buildonly-randconfig-004-20251119 (https://download.01.org/0day-ci/archive/20251119/202511191004.GdiCxONs-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511191004.GdiCxONs-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511191004.GdiCxONs-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/ntfs3/file.c:1381:5: warning: no previous prototype for function 'ntfs_file_fsync' [-Wmissing-prototypes]
    1381 | int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
         |     ^
   fs/ntfs3/file.c:1381:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1381 | int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
         | ^
         | static 
   fs/ntfs3/file.c:1415:12: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
    1415 |         .fsync          = ntfs_file_fsync,
         |                           ^~~~~~~~~~~~~~~
   fs/ntfs3/file.c:1412:12: note: previous initialization is here
    1412 |         .fsync          = generic_file_fsync,
         |                           ^~~~~~~~~~~~~~~~~~
   2 warnings generated.


vim +/ntfs_file_fsync +1381 fs/ntfs3/file.c

  1377	
  1378	/*
  1379	 * ntfs_file_fsync - file_operations::fsync
  1380	 */
> 1381	int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
  1382	{
  1383		struct inode *inode = file_inode(file);
  1384		if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
  1385			return -EIO;
  1386	
  1387		return generic_file_fsync(file, start, end, datasync);
  1388	}
  1389	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

[PATCH v2] fs/ntfs3: check for shutdown in fsync

[Konstantin Komarov]

Ensure fsync() returns -EIO when the ntfs3 filesystem is in forced
shutdown, instead of silently succeeding via generic_file_fsync().

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
---
 fs/ntfs3/file.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 3b22c7375616..5016bccc2ac5 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -1440,6 +1440,18 @@ static ssize_t ntfs_file_splice_write(struct pipe_inode_info *pipe,
 	return iter_file_splice_write(pipe, file, ppos, len, flags);
 }
 
+/*
+ * ntfs_file_fsync - file_operations::fsync
+ */
+static int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+	struct inode *inode = file_inode(file);
+	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+		return -EIO;
+
+	return generic_file_fsync(file, start, end, datasync);
+}
+
 // clang-format off
 const struct inode_operations ntfs_file_inode_operations = {
 	.getattr	= ntfs_getattr,
@@ -1462,7 +1474,7 @@ const struct file_operations ntfs_file_operations = {
 	.splice_write	= ntfs_file_splice_write,
 	.mmap_prepare	= ntfs_file_mmap_prepare,
 	.open		= ntfs_file_open,
-	.fsync		= generic_file_fsync,
+	.fsync		= ntfs_file_fsync,
 	.fallocate	= ntfs_fallocate,
 	.release	= ntfs_file_release,
 };
-- 
2.43.0