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// vim: tw=80
// Copyright (C) 2020 Axcient
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
use lazy_static::lazy_static;
use mockall::mock;
use std::{
cell::RefCell,
ffi::{CString, CStr},
os::raw::{c_char, c_int, c_void},
sync::Mutex
};
use nbdkit::*;
thread_local!(pub static ERRMSG: RefCell<String> =
const { RefCell::new(String::new()) });
thread_local!(pub static ERRNO: RefCell<i32> =
const { RefCell::new(0) });
lazy_static! {
/// Mediates access to MockServer's global expectations
/// Any test that sets an expectation on a static method (like `open`) must
/// grab this mutex
pub static ref MOCK_SERVER_MTX: Mutex<()> = Mutex::new(());
}
mock!{
pub Server {}
#[allow(dead_code)]
impl Server for Server {
fn after_fork() -> Result<()> where Self: Sized;
fn block_size(&self) -> Result<(u32,u32,u32)>;
fn cache(&self, count: u32, offset: u64) -> Result<()>;
fn can_cache(&self) -> Result<CacheFlags>;
fn can_extents(&self) -> Result<bool>;
fn can_fast_zero(&self) -> Result<bool>;
fn can_flush(&self) -> Result<bool>;
fn can_fua(&self) -> Result<FuaFlags>;
fn can_multi_conn(&self) -> Result<bool>;
fn can_trim(&self) -> Result<bool>;
fn can_write(&self) -> Result<bool>;
fn can_zero(&self) -> Result<bool>;
fn config(k: &str, v: &str) -> Result<()> where Self: Sized;
fn config_complete() -> Result<()> where Self: Sized;
fn config_help() -> Option<&'static CStr> where Self: Sized;
fn description() -> Option<&'static CStr> where Self: Sized;
fn dump_plugin() where Self: Sized;
fn extents(&self, c: u32, o: u64, f: Flags, e: &mut ExtentHandle)
-> Result<()>;
fn flush(&self) -> Result<()>;
fn get_ready() -> Result<()> where Self: Sized;
fn get_size(&self) -> Result<i64>;
fn is_rotational(&self) -> Result<bool>;
fn load() where Self: Sized;
fn longname() -> Option<&'static CStr> where Self: Sized;
fn magic_config_key() -> Option<&'static CStr> where Self: Sized;
fn name() -> &'static CStr where Self: Sized;
fn open(readonly: bool) -> Result<Box<dyn Server>> where Self: Sized;
fn preconnect(readonly: bool) -> Result<()> where Self: Sized;
fn read_at(&self, buf: &mut [u8], offset: u64) -> Result<()>;
fn thread_model() -> Result<ThreadModel> where Self: Sized;
fn trim(&self, count: u32, offset: u64, flags: Flags) -> Result<()>;
fn unload() where Self: Sized;
fn version() -> Option<&'static CStr> where Self: Sized;
fn write_at(&self, _buf: &[u8], _offset: u64, _flags: Flags) -> Result<()>;
fn zero(&self, count: u32, offset: u64, flags: Flags) -> Result<()>;
}
}
mock! {
pub NbdkitAddExtent {
pub fn add(extents: *mut c_void, offset: u64, len: u64, ty: u32) -> c_int;
}
}
#[no_mangle]
extern "C" fn nbdkit_add_extent(extents: *mut c_void,
offset: u64, len: u64, ty: u32) -> c_int
{
MockNbdkitAddExtent::add(extents, offset, len, ty)
}
// XXX The actual C function is variadic, but stable Rust can't create variadic
// extern functions yet. So we pretend that it has two arguments.
// https://github.com/rust-lang/rust/issues/44930
// extern fn nbdkit_error(fmt: *const c_char, ...);
#[no_mangle]
extern "C" fn nbdkit_error(fmt: *const c_char, msg: *const c_char) {
assert_eq!(
unsafe {CStr::from_ptr(fmt) },
CString::new("%s").unwrap().as_c_str()
);
ERRMSG.with(|m| unsafe {
CStr::from_ptr(msg)
}.to_str()
.unwrap()
.clone_into(&mut m.borrow_mut())
);
}
#[no_mangle]
extern "C" fn nbdkit_set_error(errno: c_int) {
ERRNO.with(|e| *e.borrow_mut() = errno);
}
/// Holds common setup stuff needed by most test cases
pub struct Fixture<'a> {
pub mockp: *mut Box<MockServer>,
pub plugin: &'a Plugin,
pub handle: *mut c_void
}
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