新增 squashfs 内核模块, 将 rootfs 挂载置换成 squashfs.

Author: xiaoyi1212

CMakeLists.txt

@@ -39,6 +39,7 @@ include(tools/bootloader.cmake)
 add_subdirectory(module/e1000)
 add_subdirectory(module/fatfs)
 add_subdirectory(module/iso9660)
+add_subdirectory(module/squashfs)
 
 add_executable(kernel)
 
@@ -113,6 +114,7 @@ if (CPPCHECK)
             -DSIZE_MAX=0xFFFFFFFFFFFFFFFFUL
             ${CPPCHECK_ARCH_DEFS}
             --suppress=missingIncludeSystem
+            --suppress=*:${CMAKE_SOURCE_DIR}/module/squashfs/*
             --suppress=*:${CMAKE_SOURCE_DIR}/module/fatfs/*
             --suppress=*:${CMAKE_SOURCE_DIR}/module/iso9660/*
             --suppress=*:${CMAKE_SOURCE_DIR}/src/term/flanterm/*

README.md

@@ -14,9 +14,6 @@
 
 ---
 
-I'm working on [flavortown](https://flavortown.hackclub.com/projects/10683)! And
-[www18845340923](https://flavortown.hackclub.com/users/6782) is xiaoyi1212!
-
 Languages
 : *English*
 | [简体中文](readme/README-zh-CN.md)
@@ -50,6 +47,7 @@ You need to install them on your computer:
 - lld (for linking LTO objects)
 - openssl (kernel module key)
 - python3 `cryptography` (sign kernel module)
+- squashfs-tools
 
 ### Options
 

assets/cp_rootfs.sfs

@@ -8,12 +8,12 @@ wallpaper: boot():/background.jpg
     protocol: limine
     kernel_path: boot():/cpkrnl_x64.elf
     module_path: boot():/readme.txt
-    #module_path: boot():/e1000.km
+    module_path: boot():/cp_rootfs.sfs
     module_path: boot():/fatfs.km
-    #module_path: boot():/extfs.km
+    module_path: boot():/squashfs.km
     module_path: boot():/iso9660.km
     module_path: boot():/initramfs.img
-    module_path: boot():/minirootfs_x86_64.tar.zst
+    #module_path: boot():/minirootfs_x86_64.tar.zst
     kernel_cmdline: console=tty0 mem=default init=/bin/sh
     kaslr: no
 

assets/initramfs.img

@@ -1,5 +1,7 @@
 #pragma once
 
+#define assert(expr)
+
 #include "types/stdbool.h"
 #include "types/stdint.h"
 #include "types/stddef.h"

assets/limine.conf

@@ -26,6 +26,8 @@
 #define S_ISGID  0002000
 #define S_ISVTX  0001000
 
+#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
+
 #include "cp_kernel.h"
 #include "list.h"
 #include "llist.h"

module/all_include/cp_kernel.h

@@ -0,0 +1,47 @@
+set(SQUASHFS_SOURCES
+    squashfs.c
+    src/data_reader.c
+    src/dir_reader.c
+    src/frag_table.c
+    src/id_table.c
+    src/inode.c
+    src/meta_reader.c
+    src/misc.c
+    src/read_inode.c
+    src/read_super.c
+    src/read_table.c
+    src/readdir.c
+    src/write_table_stub.c
+    src/util/alloc.c
+    src/util/array.c
+    src/util/rbtree.c
+)
+
+add_library(squashfs SHARED ${SQUASHFS_SOURCES})
+
+set_target_properties(squashfs PROPERTIES
+    LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/kmod
+)
+
+target_include_directories(squashfs PUBLIC
+    ${CMAKE_SOURCE_DIR}/module/all_include
+    ${CMAKE_CURRENT_SOURCE_DIR}/include
+    ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+target_compile_definitions(squashfs PRIVATE
+    NO_CUSTOM_ALLOC
+)
+
+target_compile_options(squashfs PRIVATE
+    -fPIC
+    -fvisibility=hidden
+    -fno-stack-protector
+    -Wno-incompatible-library-redeclaration
+)
+
+target_link_options(squashfs PRIVATE
+    -nostdlib
+    -Wl,-Bsymbolic
+    -Wl,-e,dlmain
+)

module/all_include/fs_subsystem.h

@@ -0,0 +1,122 @@
+/* config.h.  Generated from config.h.in by configure.  */
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if you have the <alloca.h> header file. */
+#define HAVE_ALLOCA_H 1
+
+/* Define to 1 if you have the <bzlib.h> header file. */
+#define HAVE_BZLIB_H 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the 'fnmatch' function. */
+#define HAVE_FNMATCH 1
+
+/* Define to 1 if you have the 'getopt' function. */
+#define HAVE_GETOPT 1
+
+/* Define to 1 if you have the 'getopt_long' function. */
+#define HAVE_GETOPT_LONG 1
+
+/* Define to 1 if you have the 'getsubopt' function. */
+#define HAVE_GETSUBOPT 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Have PTHREAD_PRIO_INHERIT. */
+#define HAVE_PTHREAD_PRIO_INHERIT 1
+
+/* Define to 1 if you have the 'sched_getaffinity' function. */
+#define HAVE_SCHED_GETAFFINITY 1
+
+/* Define to 1 if you have the <selinux/label.h> header file. */
+/* #undef HAVE_SELINUX_LABEL_H */
+
+/* Define to 1 if you have the <selinux/selinux.h> header file. */
+/* #undef HAVE_SELINUX_SELINUX_H */
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 0
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#define HAVE_STDIO_H 0
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 0
+
+/* Define to 1 if you have the 'strchrnul' function. */
+#define HAVE_STRCHRNUL 0
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 0
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 0
+
+/* Define to 1 if you have the 'strndup' function. */
+#define HAVE_STRNDUP 0
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <sys/xattr.h> header file. */
+#define HAVE_SYS_XATTR_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Does zstd support stream compression? */
+#define HAVE_ZSTD_STREAM 1
+
+/* Define to the sub-directory where libtool stores uninstalled libraries. */
+#define LT_OBJDIR ".libs/"
+
+/* Name of package */
+#define PACKAGE "squashfs-tools-ng"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "goliath@infraroot.at"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "squashfs-tools-ng"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "squashfs-tools-ng 1.2.0"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "squashfs-tools-ng"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "1.2.0"
+
+/* Define to necessary symbol if this constant uses a non-standard name on
+   your system. */
+/* #undef PTHREAD_CREATE_JOINABLE */
+
+/* Define to 1 if all of the C89 standard headers exist (not just the ones
+   required in a freestanding environment). This macro is provided for
+   backward compatibility; new code need not use it. */
+#define STDC_HEADERS 1
+
+/* Version number of package */
+#define VERSION "1.2.0"
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+/* #undef _FILE_OFFSET_BITS */
+
+/* Define to 1 on platforms where this makes off_t a 64-bit type. */
+/* #undef _LARGE_FILES */
+
+/* Number of bits in time_t, on hosts where this is settable. */
+/* #undef _TIME_BITS */
+
+/* Define to 1 on platforms where this makes time_t a 64-bit type. */
+/* #undef __MINGW_USE_VC2005_COMPAT */

module/squashfs/CMakeLists.txt

@@ -0,0 +1,3 @@
+#pragma once
+
+#include "cp_kernel.h"