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efidisk: prevent errors from diskfilter scan of removable drives 

Map EFI_NO_MEDIA to GRUB_ERR_OUT_OF_RANGE that is ignored by diskfilter. This
actually matches pretty close (we obviously attempt to read outside of media)
and avoids adding more error codes.

This affects only internally initiated scans. If read/write from removable is
explicitly requested, we still return an error and text explanation is more
clear for user than generic error.

Reported and tested by Andreas Loew <Andreas.Loew@gmx.net>
This commit is contained in:
Andrei Borzenkov 2016-02-26 21:44:37 +03:00
parent 06a3b0b214
commit b00e4c2bd9
1 changed files with 6 additions and 2 deletions
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8
grub-core/disk/efi/efidisk.c
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@ -547,7 +547,9 @@ grub_efidisk_read (struct grub_disk *disk, grub_disk_addr_t sector,
status = grub_efidisk_readwrite (disk, sector, size, buf, 0);
if (status != GRUB_EFI_SUCCESS)
if (status == GRUB_EFI_NO_MEDIA)
return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("no media in `%s'", disk->name));
else if (status != GRUB_EFI_SUCCESS)
return grub_error (GRUB_ERR_READ_ERROR,
N_("failure reading sector 0x%llx from `%s'"),
(unsigned long long) sector,
@ -568,7 +570,9 @@ grub_efidisk_write (struct grub_disk *disk, grub_disk_addr_t sector,
status = grub_efidisk_readwrite (disk, sector, size, (char *) buf, 1);
if (status != GRUB_EFI_SUCCESS)
if (status == GRUB_EFI_NO_MEDIA)
return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("no media in `%s'", disk->name));
else if (status != GRUB_EFI_SUCCESS)
return grub_error (GRUB_ERR_WRITE_ERROR,
N_("failure writing sector 0x%llx to `%s'"),
(unsigned long long) sector, disk->name);