30 lines
962 B
C++
30 lines
962 B
C++
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#include "fs/MBR.h"
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#include "Log.h"
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namespace MBR
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{
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Result<bool> identify(SharedPtr<VFS::Inode> inode)
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{
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// Cannot read a partition table from a pipe/socket/character device! Who is even coming up with this silliness?
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if (!VFS::is_seekable(inode)) return false;
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DiskHeader hdr;
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usize nread = TRY(inode->read((u8*)&hdr, 0, sizeof(hdr)));
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check(nread == 512);
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if (hdr.signature[0] != MBR_SIGNATURE_1 || hdr.signature[1] != MBR_SIGNATURE_2) return false;
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for (int i = 0; i < 4; i++)
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{
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const auto& part = hdr.partitions[i];
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if (part.partition_type == 0) continue; // Not active.
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bool bootable = part.attributes & MBR_BOOTABLE;
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kinfoln("mbr: Partition #%d is active: bootable=%d, type=%x, start=%d, sectors=%d", i, bootable,
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part.partition_type, part.start_lba, part.num_sectors);
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}
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return true;
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}
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}
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