Ports: Add `fio` port

fio allows you to test various different IO subsystems and patterns.
It can help us test and benchmark the I/O subsystems of Serenity.

This port gets the fio bootstrapped and working, using the included
.fio file, I have been able to test the file I/O performance already.

Ports/AvailablePorts.md

@@ -36,6 +36,7 @@ Please make sure to keep this list up to date when adding and updating ports. :^
 | [`emu2`](emu2/)                        | emu2 DOS emulator                                               | 2021.01                  | https://github.com/dmsc/emu2                                                   |
 | [`epsilon`](epsilon/)                  | graphical calculator simulator                                  | 15.5.0                   | https://github.com/numworks/epsilon                                            |
 | [`figlet`](figlet/)                    | FIGlet                                                          | 2.2.5                    | http://www.figlet.org/                                                         |
+| [`fio`](fio/)                          | fio - Flexible I/O tester                                       | 3.29                     | https://fio.readthedocs.io/en/latest/                                          |
 | [`flatbuffers`](flatbuffers/)          | Flatbuffers                                                     | 1.12.0                   | https://github.com/google/flatbuffers                                          |
 | [`flex`](flex/)                        | flex                                                            | 2.6.4                    | https://github.com/westes/flex                                                 |
 | [`fotaq`](fotaq/)                      | Flight of the Amazon Queen                                      | 1.0                      | https://www.scummvm.org/games/#games-queen                                     |

Ports/fio/basic-verify.fio

@@ -0,0 +1,6 @@
+[write-and-verify]
+rw=readwrite
+bs=4k
+iodepth=16
+verify=crc32c
+size=100MB

Ports/fio/package.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+port=fio
+version=3.29
+files="https://brick.kernel.dk/snaps/${port}-${version}.tar.gz ${port}-${version}.tar.gz bea42d6f9d6c009f951135591e99787ff5fa9bc1425596d3d3b19339afc7bb0e"
+auth_type=sha256
+depends=("zlib")
+
+export LDFLAGS=-ldl

Ports/fio/patches/0001-fio-remove-non-existent-header-sys-ipc.patch

@@ -0,0 +1,27 @@
+From d59316cb9bc616b4b44d432d1ad363afa69f67eb Mon Sep 17 00:00:00 2001
+From: Brian Gianforcaro <b.gianfo@gmail.com>
+Date: Tue, 21 Dec 2021 23:41:47 -0800
+Subject: [PATCH 1/4] Port: fio, remove non existent header sys/ipc.h
+
+Serenity doesn't currently have this header, and
+it doesn't appear to be needed on our platform so
+remove it for the port.
+---
+ init.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/init.c b/init.c
+index 5f069d9..81c4771 100644
+--- a/init.c
++++ b/init.c
+@@ -7,7 +7,6 @@
+ #include <ctype.h>
+ #include <string.h>
+ #include <errno.h>
+-#include <sys/ipc.h>
+ #include <sys/types.h>
+ #include <dlfcn.h>
+ #ifdef CONFIG_VALGRIND_DEV
+-- 
+2.32.0
+

Ports/fio/patches/0002-fio-add-serenityos-platform-support.patch

@@ -0,0 +1,128 @@
+From 50d3ac3b6faa9d117ec26296067aecee988dbd8c Mon Sep 17 00:00:00 2001
+From: Brian Gianforcaro <b.gianfo@gmail.com>
+Date: Tue, 21 Dec 2021 23:47:36 -0800
+Subject: [PATCH 2/4] Port: fio - Add SerenityOS platform support
+
+---
+ os/os-serenity.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
+ os/os.h          |  3 ++
+ 2 files changed, 90 insertions(+)
+ create mode 100644 os/os-serenity.h
+
+diff --git a/os/os-serenity.h b/os/os-serenity.h
+new file mode 100644
+index 0000000..941bf09
+--- /dev/null
++++ b/os/os-serenity.h
+@@ -0,0 +1,87 @@
++#ifndef FIO_OS_SERENITY_H
++#define FIO_OS_SERENITY_H
++
++#define	FIO_OS	os_serenity
++
++#include <sys/param.h>
++#include <sys/statvfs.h>
++#include <sys/utsname.h>
++#include <sys/mman.h>
++#include <sys/select.h>
++#include <netinet/in.h>
++
++#include "../file.h"
++
++#define FIO_NO_HAVE_SHM_H
++#define FIO_USE_GENERIC_INIT_RANDOM_STATE
++#define FIO_HAVE_FS_STAT
++#define FIO_HAVE_GETTID
++
++#define OS_MAP_ANON		MAP_ANON
++
++/* Serenity doesn't support:
++ *  - MADV_RANDOM
++ *  - MADV_SEQUENTIAL
++ *
++ * So any values will work for these defines.
++ */
++#ifndef POSIX_MADV_RANDOM
++#define POSIX_MADV_RANDOM 0
++#endif
++
++#ifndef POSIX_MADV_SEQUENTIAL
++#define POSIX_MADV_SEQUENTIAL 0
++#endif
++
++/*
++ * Serenity doesn't have O_SYNC, so define it here so it can be
++ * rejected at runtime instead.
++ */
++#define O_SYNC		0x2000000
++
++static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
++{
++	// TODO: Implement
++	return ENOTSUP;
++}
++
++static inline int blockdev_invalidate_cache(struct fio_file *f)
++{
++	// TODO: Implement
++	return ENOTSUP;
++}
++
++static inline unsigned long long os_phys_mem(void)
++{
++	// TODO: Implement
++	return 0; 
++}
++
++static inline int nice(int incr)
++{
++	// TODO: Implement
++	return 0;
++}
++
++static inline unsigned long long get_fs_free_size(const char *path)
++{
++	unsigned long long ret;
++	struct statvfs s;
++
++	if (statvfs(path, &s) < 0)
++		return -1ULL;
++
++	ret = s.f_frsize;
++	ret *= (unsigned long long) s.f_bfree;
++	return ret;
++}
++
++static inline in_addr_t inet_network(const char *cp)
++{
++	in_addr_t hbo;
++	in_addr_t nbo = inet_addr(cp);
++	hbo = ((nbo & 0xFF) << 24) + ((nbo & 0xFF00) << 8) + ((nbo & 0xFF0000) >> 8) + ((nbo & 0xFF000000) >> 24);
++	return hbo;
++}
++
++#endif
+diff --git a/os/os.h b/os/os.h
+index 5965d7b..46604f7 100644
+--- a/os/os.h
++++ b/os/os.h
+@@ -24,6 +24,7 @@ enum {
+ 	os_windows,
+ 	os_android,
+ 	os_dragonfly,
++	os_serenity,
+ 
+ 	os_nr,
+ };
+@@ -55,6 +56,8 @@ typedef enum {
+ #include "os-windows.h"
+ #elif defined (__DragonFly__)
+ #include "os-dragonfly.h"
++#elif defined (__serenity__)
++#include "os-serenity.h"
+ #else
+ #error "unsupported os"
+ #endif
+-- 
+2.32.0
+

Ports/fio/patches/0003-fio-add-serenityos-support-to-configure.patch

@@ -0,0 +1,26 @@
+From 99f1cf657e539078c7347c3ddc4a1537d5332e15 Mon Sep 17 00:00:00 2001
+From: Brian Gianforcaro <b.gianfo@gmail.com>
+Date: Tue, 21 Dec 2021 23:48:09 -0800
+Subject: [PATCH 3/4] Port: Add SerenityOS support to configure
+
+---
+ configure | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/configure b/configure
+index 84ccce0..04bac14 100755
+--- a/configure
++++ b/configure
+@@ -323,6 +323,9 @@ elif check_define __NetBSD__ ; then
+ elif check_define __sun__ ; then
+   targetos='SunOS'
+   CFLAGS="$CFLAGS -D_REENTRANT"
++elif check_define __serenity__ ; then
++  targetos='SerenityOS'
++  no_shm="yes"
+ elif check_define _WIN32 ; then
+   targetos='CYGWIN'
+ else
+-- 
+2.32.0
+

Ports/fio/patches/0004-fio-disable-rdtsc-support-for-serenityos.patch

@@ -0,0 +1,25 @@
+From fdf16439ed5ecb36f762dc2b66102424920e26c1 Mon Sep 17 00:00:00 2001
+From: Brian Gianforcaro <b.gianfo@gmail.com>
+Date: Tue, 21 Dec 2021 23:48:46 -0800
+Subject: [PATCH 4/4] Port: fio - Disable rdtsc support for serenity
+
+---
+ arch/arch-x86.h | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/arch/arch-x86.h b/arch/arch-x86.h
+index c6bcb54..c1005b1 100644
+--- a/arch/arch-x86.h
++++ b/arch/arch-x86.h
+@@ -35,6 +35,7 @@ static inline unsigned long long get_cpu_clock(void)
+ }
+ 
+ #define ARCH_HAVE_FFZ
+-#define ARCH_HAVE_CPU_CLOCK
++// Serenity OS doesn't allow you to read rdtsc.
++// #define ARCH_HAVE_CPU_CLOCK
+ 
+ #endif
+-- 
+2.32.0
+

Ports/fio/patches/ReadMe.md

@@ -0,0 +1,25 @@
+# Patches for fio 3.29 on SerenityOS
+
+## `0001-fio-remove-non-existent-header-sys-ipc.patch`
+
+Serenity currently doesn't have a <sys/ipc.h> header, so we have to patch the include out.
+
+## `0002-fio-add-serenityos-platform-support.patch`
+
+`fio` abstracts individual operating system support out into to an `os/os-<name>.h` header
+where you can select which platform features are available and implement missing function
+stubs for our operating system. 
+
+This patch implements basic OS support for Serenity just to get fio up and running.
+
+## `0003-fio-add-serenityos-support-to-configure.patch`
+
+This patch implements targetos detection for serenity, and also disables shared memory
+support automatically for serenity, as it's not currently supported.
+
+## `0004-fio-disable-rdtsc-support-for-serenityos.patch`
+ 
+This patch disables the function which uses `rdtsc` to get the current clock time,
+as that instruction isn't allowed to be called from user space by serenity.
+
+If you did attempt to call it you would trip a segfault.