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cgpt supports GptNextKernelEntry() and GptUpdateKernelEntry()

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Review URL: http://codereview.chromium.org/1922004
This commit is contained in:
Louis Yung-Chieh Lo
2010-05-05 11:21:08 -07:00
parent 49fa8e51ad
commit b17db3c4b9
4 changed files with 527 additions and 35 deletions
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247
cgptlib/tests/cgpt_test.c
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@@ -15,17 +15,23 @@
/* Testing partition layout (sector_bytes=512)
*
* LBA Size Usage
* ---------------------------------------------------------
* 0 1 PMBR
* 1 1 primary partition header
* 2 32 primary partition entries (128B * 128)
* 34 100 kernel A
* 134 100 kernel B
* 234 100 root A
* 334 100 root B
* 34 100 kernel A (index: 0)
* 134 100 root A (index: 1)
* 234 100 root B (index: 2)
* 334 100 kernel B (index: 3)
* 434 32 secondary partition entries
* 466 1 secondary partition header
* 467
*/
#define KERNEL_A 0
#define ROOTFS_A 1
#define ROOTFS_B 2
#define KERNEL_B 3
#define DEFAULT_SECTOR_SIZE 512
#define MAX_SECTOR_SIZE 4096
#define DEFAULT_DRIVE_SECTORS 467
@@ -87,6 +93,9 @@ GptData* GetEmptyGptData() {
gpt.secondary_entries = secondary_entries;
ZeroHeadersEntries(&gpt);
/* Initialize GptData internal states. */
gpt.current_kernel = CGPT_KERNEL_ENTRY_NOT_FOUND;
return &gpt;
}
@@ -99,9 +108,11 @@ void BuildTestGptData(GptData *gpt) {
GptHeader *header, *header2;
GptEntry *entries, *entries2;
Guid chromeos_kernel = GPT_ENT_TYPE_CHROMEOS_KERNEL;
Guid chromeos_rootfs = GPT_ENT_TYPE_CHROMEOS_ROOTFS;
gpt->sector_bytes = DEFAULT_SECTOR_SIZE;
gpt->drive_sectors = DEFAULT_DRIVE_SECTORS;
gpt->current_kernel = CGPT_KERNEL_ENTRY_NOT_FOUND;
/* build primary */
header = (GptHeader*)gpt->primary_header;
@@ -119,10 +130,10 @@ void BuildTestGptData(GptData *gpt) {
Memcpy(&entries[0].type, &chromeos_kernel, sizeof(chromeos_kernel));
entries[0].starting_lba = 34;
entries[0].ending_lba = 133;
Memcpy(&entries[1].type, &chromeos_kernel, sizeof(chromeos_kernel));
Memcpy(&entries[1].type, &chromeos_rootfs, sizeof(chromeos_rootfs));
entries[1].starting_lba = 134;
entries[1].ending_lba = 233;
Memcpy(&entries[2].type, &chromeos_kernel, sizeof(chromeos_kernel));
Memcpy(&entries[2].type, &chromeos_rootfs, sizeof(chromeos_rootfs));
entries[2].starting_lba = 234;
entries[2].ending_lba = 333;
Memcpy(&entries[3].type, &chromeos_kernel, sizeof(chromeos_kernel));
@@ -888,6 +899,223 @@ int CorruptCombinationTest() {
return TEST_OK;
}
/* Invalidate all kernel entries and expect GptNextKernelEntry() cannot find
* any usable kernel entry.
*/
int NoValidKernelEntryTest() {
GptData *gpt;
GptEntry *entries, *entries2;
gpt = GetEmptyGptData();
entries = (GptEntry*)gpt->primary_entries;
entries2 = (GptEntry*)gpt->secondary_entries;
BuildTestGptData(gpt);
entries[KERNEL_A].attributes |= CGPT_ATTRIBUTE_BAD_MASK;
Memset(&entries[KERNEL_B].type, 0, sizeof(Guid));
RefreshCrc32(gpt);
EXPECT(GPT_ERROR_NO_VALID_KERNEL == GptNextKernelEntry(gpt, NULL, NULL));
return TEST_OK;
}
/* This is the combination test. Both kernel A and B could be either inactive
* or invalid. We expect GptNextKetnelEntry() returns good kernel or
* GPT_ERROR_NO_VALID_KERNEL if no kernel is available. */
enum FAILURE_MASK {
MASK_INACTIVE = 1,
MASK_BAD_ENTRY = 2,
MASK_FAILURE_BOTH = 3,
};
void BreakAnEntry(GptEntry *entry, enum FAILURE_MASK failure) {
if (failure & MASK_INACTIVE)
Memset(&entry->type, 0, sizeof(Guid));
if (failure & MASK_BAD_ENTRY)
entry->attributes |= CGPT_ATTRIBUTE_BAD_MASK;
}
int CombinationalNextKernelEntryTest() {
GptData *gpt;
enum {
MASK_KERNEL_A = 1,
MASK_KERNEL_B = 2,
MASK_KERNEL_BOTH = 3,
} kernel;
enum FAILURE_MASK failure;
uint64_t start_sector, size;
int retval;
for (kernel = MASK_KERNEL_A; kernel <= MASK_KERNEL_BOTH; ++kernel) {
for (failure = MASK_INACTIVE; failure < MASK_FAILURE_BOTH; ++failure) {
gpt = GetEmptyGptData();
BuildTestGptData(gpt);
if (kernel & MASK_KERNEL_A)
BreakAnEntry(GetEntry(gpt, PRIMARY, KERNEL_A), failure);
if (kernel & MASK_KERNEL_B)
BreakAnEntry(GetEntry(gpt, PRIMARY, KERNEL_B), failure);
retval = GptNextKernelEntry(gpt, &start_sector, &size);
if (kernel == MASK_KERNEL_A) {
EXPECT(retval == GPT_SUCCESS);
EXPECT(start_sector == 334);
} else if (kernel == MASK_KERNEL_B) {
EXPECT(retval == GPT_SUCCESS);
EXPECT(start_sector == 34);
} else { /* MASK_KERNEL_BOTH */
EXPECT(retval == GPT_ERROR_NO_VALID_KERNEL);
}
}
}
return TEST_OK;
}
/* Increase tries value from zero, expect it won't explode/overflow after
* CGPT_ATTRIBUTE_TRIES_MASK.
*/
/* Tries would not count up after CGPT_ATTRIBUTE_MAX_TRIES. */
#define EXPECTED_TRIES(tries) \
((tries >= CGPT_ATTRIBUTE_MAX_TRIES) ? CGPT_ATTRIBUTE_MAX_TRIES \
: tries)
int IncreaseTriesTest() {
GptData *gpt;
int kernel_index[] = {
KERNEL_B,
KERNEL_A,
};
int i, tries, j;
gpt = GetEmptyGptData();
for (i = 0; i < ARRAY_SIZE(kernel_index); ++i) {
GptEntry *entries[2] = {
(GptEntry*)gpt->primary_entries,
(GptEntry*)gpt->secondary_entries,
};
int current;
BuildTestGptData(gpt);
current = gpt->current_kernel = kernel_index[i];
for (tries = 0; tries < 2 * CGPT_ATTRIBUTE_MAX_TRIES; ++tries) {
for (j = 0; j < ARRAY_SIZE(entries); ++j) {
EXPECT(EXPECTED_TRIES(tries) ==
((entries[j][current].attributes & CGPT_ATTRIBUTE_TRIES_MASK) >>
CGPT_ATTRIBUTE_TRIES_OFFSET));
}
EXPECT(GPT_SUCCESS == GptUpdateKernelEntry(gpt, GPT_UPDATE_ENTRY_TRY));
/* The expected tries value will be checked in next iteration. */
if (tries < CGPT_ATTRIBUTE_MAX_TRIES)
EXPECT((GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
GPT_MODIFIED_HEADER2 | GPT_MODIFIED_ENTRIES2) == gpt->modified);
gpt->modified = 0; /* reset before next test */
EXPECT(0 ==
Memcmp(entries[PRIMARY], entries[SECONDARY], TOTAL_ENTRIES_SIZE));
}
}
return TEST_OK;
}
/* Mark a kernel as bad. Expect:
* 1. the both bad bits of kernel A in primary and secondary entries are set.
* 2. headers and entries are marked as modified.
* 3. primary and secondary entries are identical.
*/
int MarkBadKernelEntryTest() {
GptData *gpt;
GptEntry *entries, *entries2;
gpt = GetEmptyGptData();
entries = (GptEntry*)gpt->primary_entries;
entries2 = (GptEntry*)gpt->secondary_entries;
BuildTestGptData(gpt);
gpt->current_kernel = KERNEL_A;
EXPECT(GPT_SUCCESS == GptUpdateKernelEntry(gpt, GPT_UPDATE_ENTRY_BAD));
EXPECT((GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
GPT_MODIFIED_HEADER2 | GPT_MODIFIED_ENTRIES2) == gpt->modified);
EXPECT(entries[KERNEL_A].attributes & CGPT_ATTRIBUTE_BAD_MASK);
EXPECT(entries2[KERNEL_A].attributes & CGPT_ATTRIBUTE_BAD_MASK);
EXPECT(0 == Memcmp(entries, entries2, TOTAL_ENTRIES_SIZE));
return TEST_OK;
}
/* Given an invalid kernel type, and expect GptUpdateKernelEntry() returns
* GPT_ERROR_INVALID_UPDATE_TYPE. */
int UpdateInvalidKernelTypeTest() {
GptData *gpt;
gpt = GetEmptyGptData();
BuildTestGptData(gpt);
gpt->current_kernel = 0; /* anything, but not CGPT_KERNEL_ENTRY_NOT_FOUND */
EXPECT(GPT_ERROR_INVALID_UPDATE_TYPE ==
GptUpdateKernelEntry(gpt, 99)); /* any invalid update_type value */
return TEST_OK;
}
/* A normal boot case:
* GptInit()
* GptNextKernelEntry()
* GptUpdateKernelEntry()
*/
int NormalBootCase() {
GptData *gpt;
GptEntry *entries;
uint64_t start_sector, size;
gpt = GetEmptyGptData();
entries = (GptEntry*)gpt->primary_entries;
BuildTestGptData(gpt);
EXPECT(GPT_SUCCESS == GptInit(gpt));
EXPECT(GPT_SUCCESS == GptNextKernelEntry(gpt, &start_sector, &size));
EXPECT(start_sector == 34); /* Kernel A, see top of this file. */
EXPECT(size == 100);
EXPECT(GPT_SUCCESS == GptUpdateKernelEntry(gpt, GPT_UPDATE_ENTRY_TRY));
EXPECT(((entries[KERNEL_A].attributes & CGPT_ATTRIBUTE_TRIES_MASK) >>
CGPT_ATTRIBUTE_TRIES_OFFSET) == 1);
return TEST_OK;
}
/* Higher priority kernel should boot first.
* KERNEL_A is low priority
* KERNEL_B is high priority.
* We expect KERNEL_B is selected in first run, and then KERNEL_A.
* We also expect the GptNextKernelEntry() wraps back to KERNEL_B if it's called
* after twice.
*/
int HigherPriorityTest() {
GptData *gpt;
GptEntry *entries;
gpt = GetEmptyGptData();
entries = (GptEntry*)gpt->primary_entries;
BuildTestGptData(gpt);
SetPriority(gpt, PRIMARY, KERNEL_A, 0);
SetPriority(gpt, PRIMARY, KERNEL_B, 1);
RefreshCrc32(gpt);
EXPECT(GPT_SUCCESS == GptInit(gpt));
EXPECT(GPT_SUCCESS == GptNextKernelEntry(gpt, NULL, NULL));
EXPECT(KERNEL_B == gpt->current_kernel);
EXPECT(GPT_SUCCESS == GptNextKernelEntry(gpt, NULL, NULL));
EXPECT(KERNEL_A == gpt->current_kernel);
EXPECT(GPT_SUCCESS == GptNextKernelEntry(gpt, NULL, NULL));
EXPECT(KERNEL_B == gpt->current_kernel);
return TEST_OK;
}
int main(int argc, char *argv[]) {
int i;
int error_count = 0;
@@ -916,6 +1144,13 @@ int main(int argc, char *argv[]) {
{ TEST_CASE(CorruptCombinationTest), },
{ TEST_CASE(TestQuickSortFixed), },
{ TEST_CASE(TestQuickSortRandom), },
{ TEST_CASE(NoValidKernelEntryTest), },
{ TEST_CASE(CombinationalNextKernelEntryTest), },
{ TEST_CASE(IncreaseTriesTest), },
{ TEST_CASE(MarkBadKernelEntryTest), },
{ TEST_CASE(UpdateInvalidKernelTypeTest), },
{ TEST_CASE(NormalBootCase), },
{ TEST_CASE(HigherPriorityTest), },
};
for (i = 0; i < sizeof(test_cases)/sizeof(test_cases[0]); ++i) {