51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
#include "fs/ext2/ext2_driver.h"
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#include <mammoth/debug.h>
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glcr::ErrorOr<Ext2Driver> Ext2Driver::Init(ScopedDenaliClient&& denali) {
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ASSIGN_OR_RETURN(Ext2BlockReader reader,
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Ext2BlockReader::Init(glcr::Move(denali)));
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return Ext2Driver(glcr::Move(reader));
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}
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glcr::ErrorCode Ext2Driver::ProbePartition() {
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Superblock* superblock = ext2_reader_.GetSuperblock();
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if (superblock->magic != 0xEF53) {
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dbgln("Invalid EXT2 magic code: %x");
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return glcr::INVALID_ARGUMENT;
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}
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dbgln("Block size: 0x%x", 1024 << superblock->log_block_size);
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dbgln("Blocks: 0x%x (0x%x per group)", superblock->blocks_count,
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superblock->blocks_per_group);
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dbgln("Inodes: 0x%x (0x%x per group)", superblock->inodes_count,
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superblock->inodes_per_group);
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dbgln("Mounts: 0x%x out of 0x%x", superblock->mnt_count,
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superblock->max_mnt_count);
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dbgln("State: %x", superblock->state);
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dbgln("Created by: %x", superblock->creator_os);
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uint64_t num_block_groups =
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superblock->blocks_count / superblock->blocks_per_group;
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dbgln("\nReading %u blocks groups", num_block_groups);
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uint64_t bgdt_bytes = sizeof(BlockGroupDescriptor) * num_block_groups;
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uint64_t bgdt_block = (superblock->log_block_size == 0) ? 2 : 1;
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ASSIGN_OR_RETURN(MappedMemoryRegion bgdt,
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ext2_reader_.ReadBlocks(bgdt_block, bgdt_bytes))
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BlockGroupDescriptor* bgds =
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reinterpret_cast<BlockGroupDescriptor*>(bgdt.vaddr());
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for (uint64_t i = 0; i < num_block_groups; i++) {
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dbgln("BGD %x", i);
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dbgln("Block Bitmap: %x", bgds[i].block_bitmap);
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dbgln("Inode Bitmap: %x", bgds[i].inode_bitmap);
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dbgln("Inode Table: %x", bgds[i].inode_table);
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dbgln("Free blocks: %x", bgds[i].free_blocks_count);
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dbgln("Free inodes: %x", bgds[i].free_inodes_count);
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}
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return glcr::OK;
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}
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