nilfs2: make splice write available again

commit a35d8f016e0b68634035217d06d1c53863456b50 upstream.

Since 5.10, splice() or sendfile() to NILFS2 return EINVAL.  This was
caused by commit 36e2c7421f02 ("fs: don't allow splice read/write
without explicit ops").

This patch initializes the splice_write field in file_operations, like
most file systems do, to restore the functionality.

Link: https://lkml.kernel.org/r/1612784101-14353-1-git-send-email-konishi.ryusuke@gmail.com
Signed-off-by: Joachim Henke <joachim.henke@t-systems.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: <stable@vger.kernel.org>	[5.10+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 64bc813..e1bd592 100644 (file)
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -141,6 +141,7 @@ const struct file_operations nilfs_file_operations = {
        /* .release     = nilfs_release_file, */
        .fsync          = nilfs_sync_file,
        .splice_read    = generic_file_splice_read,
+       .splice_write   = iter_file_splice_write,
 };
 
 const struct inode_operations nilfs_file_inode_operations = {