loader: efipart should check disk size from partition table
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Authored by tsoome on Mar 30 2017, 11:38 AM.

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allanjude
imp

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rS316279: loader: efipart should check disk size from partition table

Summary

While testing 32bit UEFI OVMF (which has bug about how the disk size
is presented), I did witness the errors from blkio->ReadBlocks().

It became apparent we can not entirely trust UEFI interfaces either,
so additional checks are needed.

So we use disk_ioctl(DIOCGMEDIASIZE) for disks, with fallback of
Media->LastBlock for other media.

In addition, we need to check if there is media present.

+ small fixes for error printout, and avoiding multiple blk * 512.

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rS FreeBSD src repository - subversion

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Event Timeline

tsoome created this revision.Mar 30 2017, 11:38 AM

Harbormaster completed remote builds in B8388: Diff 26816.Mar 30 2017, 11:38 AM

Approved By: allanjude

This revision is now accepted and ready to land.Mar 30 2017, 3:47 PM

Closed by commit rS316279: loader: efipart should check disk size from partition table (authored by tsoome). · Explain WhyMar 30 2017, 4:23 PM

This revision was automatically updated to reflect the committed changes.

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Path

Size

head/

sys/

boot/

efi/

libefi/

efipart.c

37 lines

Diff 26832

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head/sys/boot/efi/libefi/efipart.c

loader: efipart should check disk size from partition tableClosedPublicActions