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[Sys] Successfully spin up a new process from disk.

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This commit is contained in:
Drew Galbraith 2023-11-15 09:47:32 -08:00
parent e5568450c2
commit 7c105c8a31
22 changed files with 415 additions and 191 deletions
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31
sys/victoriafalls/fs/ext2/ext2_driver.cpp
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@ -3,9 +3,9 @@
#include <glacier/string/string.h>
#include <mammoth/debug.h>
glcr::ErrorOr<Ext2Driver> Ext2Driver::Init(ScopedDenaliClient&& denali) {
glcr::ErrorOr<Ext2Driver> Ext2Driver::Init(const DenaliInfo& denali_info) {
ASSIGN_OR_RETURN(glcr::SharedPtr<Ext2BlockReader> reader,
Ext2BlockReader::Init(glcr::Move(denali)));
Ext2BlockReader::Init(glcr::Move(denali_info)));
ASSIGN_OR_RETURN(
MappedMemoryRegion bgdt,
@ -99,10 +99,31 @@ glcr::ErrorOr<MappedMemoryRegion> Ext2Driver::ReadFile(uint64_t inode_number) {
uint64_t real_block_cnt =
(inode->blocks - 1) / (ext2_reader_->BlockSize() / 512) + 1;
if (real_block_cnt > 1) {
dbgln("Can't handle scatter-gather yet.");
if (inode->block[14]) {
dbgln("Can't handle triply-indirect blocks yet.");
return glcr::UNIMPLEMENTED;
}
return ext2_reader_->ReadBlock(inode->block[0]);
if (inode->block[13]) {
dbgln("Can't handle doubly-indirect blocks yet.");
return glcr::UNIMPLEMENTED;
}
MappedMemoryRegion indirect_block;
if (inode->block[12]) {
ASSIGN_OR_RETURN(indirect_block, ext2_reader_->ReadBlock(inode->block[12]));
}
glcr::Vector<uint64_t> blocks_to_read;
for (uint64_t i = 0; i < 12 && i < real_block_cnt; i++) {
blocks_to_read.PushBack(inode->block[i]);
}
for (uint64_t i = 12; i < 268 && i < real_block_cnt; i++) {
uint32_t* block_array = reinterpret_cast<uint32_t*>(indirect_block.vaddr());
uint64_t offset = i - 12;
blocks_to_read.PushBack(block_array[offset]);
}
return ext2_reader_->ReadBlocks(blocks_to_read);
}