vfs: no mnt_want_write_file() in vfs_{copy,clone}_file_range()
We've checked for file_out being opened for write. This ensures that we
already have mnt_want_write() on target.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
diff --git a/fs/read_write.c b/fs/read_write.c
index 190e0d36..3d810a1 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1538,9 +1538,7 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
if (len == 0)
return 0;
- ret = mnt_want_write_file(file_out);
- if (ret)
- return ret;
+ sb_start_write(inode_out->i_sb);
ret = -EOPNOTSUPP;
if (file_out->f_op->copy_file_range)
@@ -1559,7 +1557,7 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
inc_syscr(current);
inc_syscw(current);
- mnt_drop_write_file(file_out);
+ sb_end_write(inode_out->i_sb);
return ret;
}
@@ -1685,9 +1683,7 @@ int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
if (pos_in + len > i_size_read(inode_in))
return -EINVAL;
- ret = mnt_want_write_file(file_out);
- if (ret)
- return ret;
+ sb_start_write(inode_out->i_sb);
ret = file_in->f_op->clone_file_range(file_in, pos_in,
file_out, pos_out, len);
@@ -1696,7 +1692,7 @@ int vfs_clone_file_range(struct file *file_in, loff_t pos_in,
fsnotify_modify(file_out);
}
- mnt_drop_write_file(file_out);
+ sb_end_write(inode_out->i_sb);
return ret;
}
EXPORT_SYMBOL(vfs_clone_file_range);