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part_blk: probe whole disk if no valid MBR found

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Report the whole disk as partition 0 and probe file system. The
partitions type is set to 'disk'.

Issue #2803.
This commit is contained in:
Josef Söntgen 2018-05-04 10:49:11 +02:00 committed by Christian Helmuth
parent 90360674ed
commit 45743ce884
1 changed files with 49 additions and 23 deletions
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40
repos/os/src/server/part_blk/mbr.h
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@ -145,10 +145,11 @@ struct Mbr_partition_table : public Block::Partition_table
Mbr *mbr = s.addr<Mbr *>(); Mbr *mbr = s.addr<Mbr *>();
/* no partition table, use whole disc as partition 0 */ /* no partition table, use whole disc as partition 0 */
if (!(mbr->valid())) bool const mbr_valid = mbr->valid();
if (!mbr_valid) {
_part_list[0] = new (&heap) _part_list[0] = new (&heap)
Block::Partition(0, driver.blk_cnt() - 1); Block::Partition(0, driver.blk_cnt() - 1);
} else {
_parse_mbr(mbr, [&] (int i, Partition_record *r, unsigned offset) { _parse_mbr(mbr, [&] (int i, Partition_record *r, unsigned offset) {
Genode::log("Partition ", i, ": LBA ", Genode::log("Partition ", i, ": LBA ",
(unsigned int) r->_lba + offset, " (", (unsigned int) r->_lba + offset, " (",
@ -158,18 +159,23 @@ struct Mbr_partition_table : public Block::Partition_table
_part_list[i] = new (&heap) _part_list[i] = new (&heap)
Block::Partition(r->_lba + offset, r->_sectors); Block::Partition(r->_lba + offset, r->_sectors);
}); });
}
/* Report the partitions */ /* Report the partitions */
if (reporter.enabled()) if (reporter.enabled()) {
{
enum { PROBE_BYTES = 4096, };
Genode::size_t const block_size = driver.blk_size();
Genode::Reporter::Xml_generator xml(reporter, [&] () { Genode::Reporter::Xml_generator xml(reporter, [&] () {
if (mbr_valid) {
xml.attribute("type", "mbr"); xml.attribute("type", "mbr");
_parse_mbr(mbr, [&] (int i, Partition_record *r, unsigned offset) { _parse_mbr(mbr, [&] (int i, Partition_record *r, unsigned offset) {
enum { BYTES = 4096, }; Sector fs(driver, r->_lba + offset, PROBE_BYTES / block_size);
Sector fs(driver, r->_lba + offset, BYTES / driver.blk_size()); Fs::Type fs_type = Fs::probe(fs.addr<Genode::uint8_t*>(), PROBE_BYTES);
Fs::Type fs_type = Fs::probe(fs.addr<Genode::uint8_t*>(), BYTES);
xml.node("partition", [&] { xml.node("partition", [&] {
xml.attribute("number", i); xml.attribute("number", i);
@ -183,6 +189,26 @@ struct Mbr_partition_table : public Block::Partition_table
} }
}); });
}); });
} else {
xml.attribute("type", "disk");
enum { PART_NUM = 0, };
Block::Partition const &disk = *_part_list[PART_NUM];
Sector fs(driver, disk.lba, PROBE_BYTES / block_size);
Fs::Type fs_type = Fs::probe(fs.addr<Genode::uint8_t*>(), PROBE_BYTES);
xml.node("partition", [&] {
xml.attribute("number", PART_NUM);
xml.attribute("start", disk.lba);
xml.attribute("length", disk.sectors + 1);
xml.attribute("block_size", driver.blk_size());
if (fs_type.valid()) {
xml.attribute("file_system", fs_type);
}
});
}
}); });
} }