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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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53
sys/victoriafalls/fs/ext2/ext2_block_reader.cpp
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@ -3,12 +3,22 @@
#include "mammoth/debug.h"
glcr::ErrorOr<glcr::SharedPtr<Ext2BlockReader>> Ext2BlockReader::Init(
ScopedDenaliClient&& denali) {
const DenaliInfo& denali_info) {
// Read 1024 bytes from 1024 offset.
// FIXME: Don't assume 512 byte sectors somehow.
ASSIGN_OR_RETURN(MappedMemoryRegion superblock, denali.ReadSectors(2, 2));
DenaliClient client(denali_info.denali_endpoint());
ReadRequest req;
req.set_device_id(denali_info.device_id());
req.set_lba(denali_info.lba_offset() + 2);
req.set_size(2);
ReadResponse resp;
RET_ERR(client.Read(req, resp));
MappedMemoryRegion superblock =
MappedMemoryRegion::FromCapability(resp.memory());
return glcr::SharedPtr<Ext2BlockReader>(
new Ext2BlockReader(glcr::Move(denali), superblock));
new Ext2BlockReader(glcr::Move(client), denali_info.device_id(),
denali_info.lba_offset(), superblock));
}
Superblock* Ext2BlockReader::GetSuperblock() {
@ -51,15 +61,40 @@ uint64_t Ext2BlockReader::InodeTableBlockSize() {
glcr::ErrorOr<MappedMemoryRegion> Ext2BlockReader::ReadBlock(
uint64_t block_number) {
return denali_.ReadSectors(block_number * SectorsPerBlock(),
SectorsPerBlock());
return ReadBlocks(block_number, 1);
}
glcr::ErrorOr<MappedMemoryRegion> Ext2BlockReader::ReadBlocks(
uint64_t block_number, uint64_t num_blocks) {
return denali_.ReadSectors(block_number * SectorsPerBlock(),
num_blocks * SectorsPerBlock());
ReadRequest req;
req.set_device_id(device_id_);
req.set_lba(lba_offset_ + block_number * SectorsPerBlock());
req.set_size(num_blocks * SectorsPerBlock());
ReadResponse resp;
RET_ERR(denali_.Read(req, resp));
return MappedMemoryRegion::FromCapability(resp.memory());
}
Ext2BlockReader::Ext2BlockReader(ScopedDenaliClient&& denali,
glcr::ErrorOr<MappedMemoryRegion> Ext2BlockReader::ReadBlocks(
const glcr::Vector<uint64_t>& block_list) {
ReadManyRequest req;
req.set_device_id(device_id_);
// FIXME: We should have better ergonomics for setting a repeated field in
// Yunq.
for (uint64_t i = 0; i < block_list.size(); i++) {
uint64_t sector = lba_offset_ + block_list.at(i) * SectorsPerBlock();
for (uint64_t j = 0; j < SectorsPerBlock(); j++) {
req.add_lba(sector + j);
}
}
ReadResponse resp;
RET_ERR(denali_.ReadMany(req, resp));
return MappedMemoryRegion::FromCapability(resp.memory());
}
Ext2BlockReader::Ext2BlockReader(DenaliClient&& denali, uint64_t device_id,
uint64_t lba_offset,
MappedMemoryRegion super_block)
: denali_(glcr::Move(denali)), super_block_region_(super_block) {}
: denali_(glcr::Move(denali)),
device_id_(device_id),
lba_offset_(lba_offset),
super_block_region_(super_block) {}