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Initial TAR filesystem support

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This commit is contained in:
Furkan Mudanyali 2022-07-27 05:49:06 +03:00
parent e732850791
commit 40d670386a
8 changed files with 164 additions and 23 deletions
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22
fs/rock.txt Normal file
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@ -0,0 +1,22 @@
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3
iso.sh
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@ -7,9 +7,12 @@ mkdir -p isodir/boot
mkdir -p isodir/boot/grub
cp sysroot/boot/rockos.kernel isodir/boot/rockos.kernel
tar -cvf sysroot/boot/rockos.initrd fs/*
cp sysroot/boot/rockos.initrd isodir/boot/rockos.initrd
cat > isodir/boot/grub/grub.cfg << EOF
menuentry "rockOS" {
multiboot /boot/rockos.kernel
module /boot/rockos.initrd
}
EOF
"${GRUB_MKRESCUE}" -o rockos.iso isodir

1
kernel/Makefile
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@ -35,6 +35,7 @@ rockos/kheap.o \
rockos/paging.o \
rockos/keyboard.o \
rockos/timer.o \
rockos/vfs.o \
OBJS=\
$(ARCHDIR)/boot/crti.o \

6
kernel/include/rockos/rockos.h
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@ -24,8 +24,4 @@ static inline void panic(char* str) {
asm("cli;hlt");
}
static inline void assert(uint32_t val) {
if(!val) {
panic("ASSERTION FAILED!");
}
}
#define assert(val) ((val) ? (void)0: (printf("ASSERTION FAILED, " __FILE__ ":%d: " #val "\n", __LINE__), panic("")))

64
kernel/include/rockos/vfs.h Normal file
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@ -0,0 +1,64 @@
/**
* VFS section header of rockOS
* Copyright (C) 2022 Furkan Mudanyali
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, _either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef _ROCKOS_VFS_H
#define _ROCKOS_VFS_H
#define FS_FILE 1
#define FS_DIR 2
#define FS_CHARDEV 3
#define FS_BLOCKDEV 4
#define FS_PIPE 5
#define FS_SYMLINK 6
#define FS_MOUNTPOINT 8
#include <stdint.h>
#define F_REGULAR 0
#define F_NORMAL '0'
#define F_HLINK '1'
#define F_SYMLINK '2'
#define F_CHARDEV '3'
#define F_BLKDEV '4'
#define F_DIR '5'
#define F_FIFO '6'
#define F_CONT '7'
typedef struct {
char filename[100]; // Filename
char mode[8]; // File mode
char uid[8]; // User ID
char gid[8]; // Group ID
char size[12]; // File size in bytes in octal string
char mtime[12]; // Modified time in UNIX Timestamp in octal string
char chksum[8]; // Checksum
char typeflag[1]; // File type
char linkname[100]; // Name of linked file
char magic[8]; // "ustar\000"
} TarHeader;
typedef struct {
TarHeader* header;
uint32_t* data;
} Tar;
uint32_t TarGetSize(const char*);
uint32_t TarParse(uint32_t);
#endif

32
kernel/rockos/kernel.c
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@ -25,12 +25,13 @@
#include <rockos/paging.h>
#include <rockos/kheap.h>
#include <rockos/multiboot.h>
#include <rockos/vfs.h>
#include <rockos/rockos.h>
#include <string.h>
extern char _rockos_start, _rockos_end;
static multiboot_info_t* multiboot_info;
multiboot_info_t* multiboot_info;
Tar* files;
void bootloader_init(multiboot_info_t* mbd, unsigned int magic) {
/* Make sure the magic number matches for memory mapping*/
@ -46,12 +47,6 @@ void bootloader_init(multiboot_info_t* mbd, unsigned int magic) {
}
void kernel_main() {
printf("Hello, kernel World!\n");
printf("String test: %s\n", "HELLOOOOO");
printf("Float test: %.10f\n", 0.123456789);
printf("Int test: %d\n", 747474);
printf("Hex test: 0x%x\n", 0xDEADBEEF);
printf("And now for 0.1 + 0.2...... which is: %.17f\n", 0.1 + 0.2);
initialize_keyset();
outb(0x70, 0x0); // Seconds
@ -66,8 +61,6 @@ void kernel_main() {
hour = ((hour & 0x0F) + (((hour & 0x70) / 16) * 10)) | (hour & 0x80);
printf("Time: %02d:%02d:%02d UTC+3\n", (hour + 3) % 24, min, sec);
printf("RockOS Start: %#08X, RockOS End: %#08X\n", &_rockos_start, &_rockos_end);
for(multiboot_uint32_t i = 0; i < multiboot_info->mmap_length; i += sizeof(multiboot_memory_map_t)) {
multiboot_memory_map_t* mmmt =
(multiboot_memory_map_t*) (multiboot_info->mmap_addr + i);
@ -80,14 +73,17 @@ void kernel_main() {
}
}
uint32_t a = kmalloc(8);
uint32_t b = kmalloc(8);
uint32_t c = kmalloc(8);
printf("A: %#08X B: %#08X C: %#08X\n",a,b,c);
kfree(c);
kfree(b);
uint32_t d = kmalloc(8);
printf("D: %#08X\n", d);
files = kmalloc(256 * sizeof(Tar));
uint32_t initrd_location = *((uint32_t*)multiboot_info->mods_addr);
printf("Initrd location: %#08X\n", initrd_location);
uint32_t fileCount = TarParse(initrd_location);
printf("Found files: %d\n", fileCount);
for(uint32_t i = 0; i < fileCount; ++i) {
printf("Filename: %s\n", files[i].header->filename);
printf("%s\n", files[i].data);
}
unsigned char key;
for(;;) {

3
kernel/rockos/paging.c
View File

@ -18,6 +18,7 @@
#include <rockos/paging.h>
#include <rockos/kheap.h>
#include <rockos/multiboot.h>
#include <rockos/rockos.h>
#include <string.h>
@ -31,6 +32,7 @@ uint32_t* frames;
uint32_t nframes;
extern uint32_t start_addr;
extern multiboot_info_t* multiboot_info;
extern Heap* kheap;
void FrameSet(uint32_t frame_addr) {
@ -114,6 +116,7 @@ void paging_switch_dir(PageDirectory* dir) {
}
void paging_init() {
start_addr = *(uint32_t*)(multiboot_info->mods_addr + 4);
printf("Initializing paging.\n");
uint32_t page_end_mem = 0x1000000;
nframes = page_end_mem / 0x1000;

56
kernel/rockos/vfs.c Normal file
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@ -0,0 +1,56 @@
/**
* VFS section of rockOS
* Copyright (C) 2022 Furkan Mudanyali
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, _either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <rockos/vfs.h>
#include <rockos/kheap.h>
#include <string.h>
#include <stdio.h>
extern Tar* files;
uint32_t TarGetSize(const char* in) {
uint32_t size = 0;
uint32_t count = 1;
for(uint32_t i = 11; i > 0; i--, count *= 8) {
size += ((in[i - 1] - '0') * count);
}
return size;
}
uint32_t TarParse(uint32_t addr) {
uint32_t i;
for(i = 0;; i++) {
TarHeader* header = (TarHeader*)addr;
if(memcmp("ustar", header->magic, 5) &&
memcmp("ustar\0", header->magic, 6) &&
memcmp("ustar\000", header->magic, 8)) {
break;
}
uint32_t size = TarGetSize(header->size);
files[i].header = addr;
files[i].data = addr + 512;
addr += ((size / 512) + 1) * 512;
if(size % 512) {
addr += 512;
}
}
return i;
}