udf: Support splicing to file

Add explicit support for splicing from pipe to file through
iter_file_splice_write(). Commit 36e2c7421f02 ("fs: don't allow splice
read/write without explicit ops") removed the default .splice_write
operation which effectively removed UDF support for splicing from pipe.

Fixes: 36e2c7421f02 ("fs: don't allow splice read/write without explicit ops")
Reported-by: kernel test robot <yujie.liu@intel.com>
Link: https://lore.kernel.org/r/202209081443.593ab12-yujie.liu@intel.com
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/udf/file.c b/fs/udf/file.c
index 09aef77..5c659e2 100644 (file)
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -252,6 +252,7 @@ const struct file_operations udf_file_operations = {
        .release                = udf_release_file,
        .fsync                  = generic_file_fsync,
        .splice_read            = generic_file_splice_read,
+       .splice_write           = iter_file_splice_write,
        .llseek                 = generic_file_llseek,
 };