PrawnOS-nonfree/patches-tested/add-support-for-IGNOREME-GPT-signature.patch
SolidHal cad1891021 Address mmc issue
Added three patches to fix the mmc issue as described here:
https://github.com/SolidHal/Librean/issues/17
Source for the patches is the chrome os kernel. Links to
the commits can be found in the issue.

Locking into version 4.17.2 for the time being.

Better organized patches.
Added logic to only apply tested patches on fresh kernel.

Moved some debian build improvements in from my devsus
master branch, including switching from xfce to lxqt.

May be able to add option between the two in the future,
as the issue that led to switching DEs may have been with
the xorg video drivers that are now skipped by the script
and not xfce itself.

Cleaned up uneeded old configs
2018-08-23 14:43:20 -05:00

99 lines
3.3 KiB
Diff

diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index 4bf0f97..b33671d 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -348,23 +348,32 @@
* @lba is the logical block address of the GPT header to test
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
+ * @ignored is filled on return with 1 if this is an IGNOREME GPT,
+ * 0 otherwise. May be NULL.
*
* Description: returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
*/
static int is_gpt_valid(struct parsed_partitions *state, u64 lba,
- gpt_header **gpt, gpt_entry **ptes)
+ gpt_header **gpt, gpt_entry **ptes, int *ignored)
{
u32 crc, origcrc;
u64 lastlba;
+ if (ignored)
+ *ignored = 0;
if (!ptes)
return 0;
if (!(*gpt = alloc_read_gpt_header(state, lba)))
return 0;
/* Check the GUID Partition Table signature */
- if (le64_to_cpu((*gpt)->signature) != GPT_HEADER_SIGNATURE) {
+ if (le64_to_cpu((*gpt)->signature) == GPT_HEADER_SIGNATURE_IGNORED) {
+ pr_debug("GUID Partition Table at LBA %llu marked IGNOREME\n");
+ if (ignored)
+ *ignored = 1;
+ goto fail;
+ } else if (le64_to_cpu((*gpt)->signature) != GPT_HEADER_SIGNATURE) {
pr_debug("GUID Partition Table Header signature is wrong:"
"%lld != %lld\n",
(unsigned long long)le64_to_cpu((*gpt)->signature),
@@ -592,7 +601,7 @@
static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt,
gpt_entry **ptes)
{
- int good_pgpt = 0, good_agpt = 0, good_pmbr = 0;
+ int good_pgpt = 0, good_agpt = 0, good_pmbr = 0, pgpt_ignored = 0;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr;
@@ -622,19 +631,20 @@
}
good_pgpt = is_gpt_valid(state, GPT_PRIMARY_PARTITION_TABLE_LBA,
- &pgpt, &pptes);
+ &pgpt, &pptes, &pgpt_ignored);
if (good_pgpt)
good_agpt = is_gpt_valid(state,
le64_to_cpu(pgpt->alternate_lba),
- &agpt, &aptes);
- if (!good_agpt && force_gpt)
- good_agpt = is_gpt_valid(state, lastlba, &agpt, &aptes);
+ &agpt, &aptes, NULL);
+ if (!good_agpt && (force_gpt || pgpt_ignored))
+ good_agpt = is_gpt_valid(state, lastlba, &agpt, &aptes, NULL);
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt)
goto fail;
- compare_gpts(pgpt, agpt, lastlba);
+ if (!pgpt_ignored)
+ compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt) {
@@ -651,7 +661,8 @@
*ptes = aptes;
kfree(pgpt);
kfree(pptes);
- pr_warn("Primary GPT is invalid, using alternate GPT.\n");
+ pr_warn("Primary GPT is %s, using alternate GPT.\n",
+ pgpt_ignored ? "being ignored" : "invalid");
return 1;
}
diff --git a/block/partitions/efi.h b/block/partitions/efi.h
index 4efcafb..3a13ef9 100644
--- a/block/partitions/efi.h
+++ b/block/partitions/efi.h
@@ -40,7 +40,8 @@
#define GPT_MBR_PROTECTIVE 1
#define GPT_MBR_HYBRID 2
-#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
+#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL /* 'EFI PART' */
+#define GPT_HEADER_SIGNATURE_IGNORED 0x454d45524f4e4749ULL /* 'IGNOREME' */
#define GPT_HEADER_REVISION_V1 0x00010000
#define GPT_PRIMARY_PARTITION_TABLE_LBA 1