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Remove existing VHD code.

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This commit is contained in:
Stephen McKinney
2020-11-17 00:42:52 -06:00
parent 18db2af1eb
commit 3085b1579f
3 changed files with 18 additions and 383 deletions
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338
src/disk/hdd_image.c
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@@ -49,27 +49,6 @@ hdd_image_t hdd_images[HDD_NUM];
static char empty_sector[512];
static char *empty_sector_1mb;
#define VHD_OFFSET_COOKIE 0
#define VHD_OFFSET_FEATURES 8
#define VHD_OFFSET_VERSION 12
#define VHD_OFFSET_DATA_OFFSET 16
#define VHD_OFFSET_TIMESTAMP 24
#define VHD_OFFSET_CREATOR 28
#define VHD_OFFSET_CREATOR_VERS 32
#define VHD_OFFSET_CREATOR_HOST 36
#define VHD_OFFSET_ORIG_SIZE 40
#define VHD_OFFSET_CURR_SIZE 48
#define VHD_OFFSET_GEOM_CYL 56
#define VHD_OFFSET_GEOM_HEAD 58
#define VHD_OFFSET_GEOM_SPT 59
#define VHD_OFFSET_TYPE 60
#define VHD_OFFSET_CHECKSUM 64
#define VHD_OFFSET_UUID 68
#define VHD_OFFSET_SAVED_STATE 84
#define VHD_OFFSET_RESERVED 85
#ifdef ENABLE_HDD_IMAGE_LOG
int hdd_image_do_log = ENABLE_HDD_IMAGE_LOG;
@@ -152,10 +131,7 @@ image_is_hdx(const wchar_t *s, int check_signature)
int
image_is_vhd(const wchar_t *s, int check_signature)
{
int len;
FILE *f;
uint64_t filelen;
uint64_t signature;
int len;
char *ws = (char *) s;
wchar_t ext[5] = { 0, 0, 0, 0, 0 };
len = wcslen(s);
@@ -164,257 +140,16 @@ image_is_vhd(const wchar_t *s, int check_signature)
memcpy(ext, ws + ((len - 4) << 1), 8);
if (wcscasecmp(ext, L".VHD") == 0) {
if (check_signature) {
f = plat_fopen((wchar_t *)s, L"rb");
if (!f)
return 0;
fseeko64(f, 0, SEEK_END);
filelen = ftello64(f);
if (fseeko64(f, -512, SEEK_END) == -1) {
fclose(f);
fatal("image_is_vhd(): Error seeking\n");
}
if (filelen < 512) {
if (f != NULL)
fclose(f);
return 0;
}
if (fread(&signature, 1, 8, f) != 8)
fatal("image_is_vhd(): Error reading signature\n");
fclose(f);
if (signature == 0x78697463656E6F63ll)
// if is VHD
return 1;
else
return 0;
// else
// return 0;
} else
return 1;
} else
return 0;
}
static uint64_t
be_to_u64(uint8_t *bytes, int start)
{
uint64_t n = ((uint64_t) bytes[start + 7] << 0) |
((uint64_t) bytes[start + 6] << 8) |
((uint64_t) bytes[start + 5] << 16) |
((uint64_t) bytes[start + 4] << 24) |
((uint64_t) bytes[start + 3] << 32) |
((uint64_t) bytes[start + 2] << 40) |
((uint64_t) bytes[start + 1] << 48) |
((uint64_t) bytes[start ] << 56);
return n;
}
static uint32_t
be_to_u32(uint8_t *bytes, int start)
{
uint32_t n = ((uint32_t) bytes[start + 3] << 0) |
((uint32_t) bytes[start + 2] << 8) |
((uint32_t) bytes[start + 1] << 16) |
((uint32_t) bytes[start ] << 24);
return n;
}
static uint16_t
be_to_u16(uint8_t *bytes, int start)
{
uint16_t n = ((uint16_t) bytes[start + 1] << 0) |
((uint16_t) bytes[start ] << 8);
return n;
}
static uint64_t
u64_to_be(uint64_t value, int is_be)
{
uint64_t res = 0;
if (is_be)
res = value;
else {
uint64_t mask = 0xff00000000000000;
res = ((value & (mask >> 0)) >> 56) |
((value & (mask >> 8)) >> 40) |
((value & (mask >> 16)) >> 24) |
((value & (mask >> 24)) >> 8) |
((value & (mask >> 32)) << 8) |
((value & (mask >> 40)) << 24) |
((value & (mask >> 48)) << 40) |
((value & (mask >> 56)) << 56);
}
return res;
}
static uint32_t
u32_to_be(uint32_t value, int is_be)
{
uint32_t res = 0;
if (is_be)
res = value;
else {
uint32_t mask = 0xff000000;
res = ((value & (mask >> 0)) >> 24) |
((value & (mask >> 8)) >> 8) |
((value & (mask >> 16)) << 8) |
((value & (mask >> 24)) << 24);
}
return res;
}
static uint16_t
u16_to_be(uint16_t value, int is_be)
{
uint16_t res = 0;
if (is_be)
res = value;
else
res = (value >> 8) | (value << 8);
return res;
}
static void
mk_guid(uint8_t *guid)
{
int n;
for (n = 0; n < 16; n++)
guid[n] = random_generate();
guid[6] &= 0x0F;
guid[6] |= 0x40; /* Type 4 */
guid[8] &= 0x3F;
guid[8] |= 0x80; /* Variant 1 */
}
static uint32_t
calc_vhd_timestamp()
{
time_t start_time;
time_t curr_time;
double vhd_time;
start_time = 946684800; /* 1 Jan 2000 00:00 */
curr_time = time(NULL);
vhd_time = difftime(curr_time, start_time);
return (uint32_t)vhd_time;
}
void
vhd_footer_from_bytes(vhd_footer_t *vhd, uint8_t *bytes)
{
memcpy(vhd->cookie, bytes + VHD_OFFSET_COOKIE, sizeof(vhd->cookie));
vhd->features = be_to_u32(bytes, VHD_OFFSET_FEATURES);
vhd->version = be_to_u32(bytes, VHD_OFFSET_VERSION);
vhd->offset = be_to_u64(bytes, VHD_OFFSET_DATA_OFFSET);
vhd->timestamp = be_to_u32(bytes, VHD_OFFSET_TIMESTAMP);
memcpy(vhd->creator, bytes + VHD_OFFSET_CREATOR, sizeof(vhd->creator));
vhd->creator_vers = be_to_u32(bytes, VHD_OFFSET_CREATOR_VERS);
memcpy(vhd->creator_host_os, bytes + VHD_OFFSET_CREATOR_HOST, sizeof(vhd->creator_host_os));
vhd->orig_size = be_to_u64(bytes, VHD_OFFSET_ORIG_SIZE);
vhd->curr_size = be_to_u64(bytes, VHD_OFFSET_CURR_SIZE);
vhd->geom.cyl = be_to_u16(bytes, VHD_OFFSET_GEOM_CYL);
vhd->geom.heads = bytes[VHD_OFFSET_GEOM_HEAD];
vhd->geom.spt = bytes[VHD_OFFSET_GEOM_SPT];
vhd->type = be_to_u32(bytes, VHD_OFFSET_TYPE);
vhd->checksum = be_to_u32(bytes, VHD_OFFSET_CHECKSUM);
memcpy(vhd->uuid, bytes + VHD_OFFSET_UUID, sizeof(vhd->uuid)); /* TODO: handle UUID's properly */
vhd->saved_state = bytes[VHD_OFFSET_SAVED_STATE];
memcpy(vhd->reserved, bytes + VHD_OFFSET_RESERVED, sizeof(vhd->reserved));
}
void
vhd_footer_to_bytes(uint8_t *bytes, vhd_footer_t *vhd)
{
/* Quick endian check */
int is_be = 0;
uint8_t e = 1;
uint8_t *ep = &e;
uint16_t u16;
uint32_t u32;
uint64_t u64;
if (ep[0] == 0)
is_be = 1;
memcpy(bytes + VHD_OFFSET_COOKIE, vhd->cookie, sizeof(vhd->cookie));
u32 = u32_to_be(vhd->features, is_be);
memcpy(bytes + VHD_OFFSET_FEATURES, &u32, sizeof(vhd->features));
u32 = u32_to_be(vhd->version, is_be);
memcpy(bytes + VHD_OFFSET_VERSION, &u32, sizeof(vhd->version));
u64 = u64_to_be(vhd->offset, is_be);
memcpy(bytes + VHD_OFFSET_DATA_OFFSET, &u64, sizeof(vhd->offset));
u32 = u32_to_be(vhd->timestamp, is_be);
memcpy(bytes + VHD_OFFSET_TIMESTAMP, &u32, sizeof(vhd->timestamp));
memcpy(bytes + VHD_OFFSET_CREATOR, vhd->creator, sizeof(vhd->creator));
u32 = u32_to_be(vhd->creator_vers, is_be);
memcpy(bytes + VHD_OFFSET_CREATOR_VERS, &u32, sizeof(vhd->creator_vers));
memcpy(bytes + VHD_OFFSET_CREATOR_HOST, vhd->creator_host_os, sizeof(vhd->creator_host_os));
u64 = u64_to_be(vhd->orig_size, is_be);
memcpy(bytes + VHD_OFFSET_ORIG_SIZE, &u64, sizeof(vhd->orig_size));
u64 = u64_to_be(vhd->curr_size, is_be);
memcpy(bytes + VHD_OFFSET_CURR_SIZE, &u64, sizeof(vhd->curr_size));
u16 = u16_to_be(vhd->geom.cyl, is_be);
memcpy(bytes + VHD_OFFSET_GEOM_CYL, &u16, sizeof(vhd->geom.cyl));
memcpy(bytes + VHD_OFFSET_GEOM_HEAD, &(vhd->geom.heads), sizeof(vhd->geom.heads));
memcpy(bytes + VHD_OFFSET_GEOM_SPT, &(vhd->geom.spt), sizeof(vhd->geom.spt));
u32 = u32_to_be(vhd->type, is_be);
memcpy(bytes + VHD_OFFSET_TYPE, &u32, sizeof(vhd->type));
u32 = u32_to_be(vhd->checksum, is_be);
memcpy(bytes + VHD_OFFSET_CHECKSUM, &u32, sizeof(vhd->checksum));
memcpy(bytes + VHD_OFFSET_UUID, vhd->uuid, sizeof(vhd->uuid));
memcpy(bytes + VHD_OFFSET_SAVED_STATE, &(vhd->saved_state), sizeof(vhd->saved_state));
memcpy(bytes + VHD_OFFSET_RESERVED, vhd->reserved, sizeof(vhd->reserved));
}
void
new_vhd_footer(vhd_footer_t **vhd)
{
uint8_t cookie[8] = {'c', 'o', 'n', 'e', 'c', 't', 'i', 'x'};
uint8_t creator[4] = {'8', '6', 'b', 'x'};
uint8_t cr_host_os[4] = {'W', 'i', '2', 'k'};
if (*vhd == NULL)
*vhd = (vhd_footer_t *) malloc(sizeof(vhd_footer_t));
memcpy((*vhd)->cookie, cookie, 8);
(*vhd)->features = 0x00000002;
(*vhd)->version = 0x00010000;
(*vhd)->offset = 0xffffffffffffffff; /* fixed disk */
(*vhd)->timestamp = calc_vhd_timestamp();
memcpy((*vhd)->creator, creator, 4);
(*vhd)->creator_vers = 0x00010000;
memcpy((*vhd)->creator_host_os, cr_host_os, 4);
(*vhd)->type = 2; /* fixed disk */
mk_guid((*vhd)->uuid);
(*vhd)->saved_state = 0;
memset((*vhd)->reserved, 0, 427);
}
void
generate_vhd_checksum(vhd_footer_t *vhd)
{
uint32_t chk = 0;
int i;
for (i = 0; i < sizeof(vhd_footer_t); i++) {
/* We don't include the checksum field in the checksum */
if ((i < VHD_OFFSET_CHECKSUM) || (i >= VHD_OFFSET_UUID))
chk += ((uint8_t*)vhd)[i];
}
vhd->checksum = ~chk;
}
void
hdd_image_calc_chs(uint32_t *c, uint32_t *h, uint32_t *s, uint32_t size)
{
@@ -510,26 +245,6 @@ hdd_image_init(void)
memset(&hdd_images[i], 0, sizeof(hdd_image_t));
}
static void
hdd_image_gen_vft(int id, vhd_footer_t **vft, uint64_t full_size)
{
/* Generate new footer. */
new_vhd_footer(vft);
(*vft)->orig_size = (*vft)->curr_size = full_size;
(*vft)->geom.cyl = hdd[id].tracks;
(*vft)->geom.heads = hdd[id].hpc;
(*vft)->geom.spt = hdd[id].spt;
generate_vhd_checksum(*vft);
vhd_footer_to_bytes((uint8_t *) empty_sector, *vft);
fseeko64(hdd_images[id].file, 0, SEEK_END);
fwrite(empty_sector, 1, 512, hdd_images[id].file);
free(*vft);
*vft = NULL;
hdd_images[id].type = 3;
}
int
hdd_image_load(int id)
{
@@ -542,8 +257,7 @@ hdd_image_load(int id)
uint64_t s = 0;
wchar_t *fn = hdd[id].fn;
int is_hdx[2] = { 0, 0 };
int is_vhd[2] = { 0, 0 };
vhd_footer_t *vft = NULL;
int is_vhd[2] = { 0, 0 };
memset(empty_sector, 0, sizeof(empty_sector));
@@ -633,7 +347,7 @@ hdd_image_load(int id)
if (is_vhd[0]) {
/* VHD image. */
hdd_image_gen_vft(id, &vft, full_size);
hdd_images[id].type = 3;
}
return ret;
@@ -704,29 +418,11 @@ hdd_image_load(int id)
hdd[id].hpc = hpc;
hdd[id].tracks = tracks;
hdd_images[id].type = 2;
} else if (is_vhd[1]) {
if (fseeko64(hdd_images[id].file, -512, SEEK_END) == -1)
fatal("hdd_image_load(): VHD: Error seeking to 512 bytes before the end of file\n");
if (fread(empty_sector, 1, 512, hdd_images[id].file) != 512)
fatal("hdd_image_load(): HDX: Error reading the footer\n");
new_vhd_footer(&vft);
vhd_footer_from_bytes(vft, (uint8_t *) empty_sector);
if (vft->type != 2) {
/* VHD is not fixed size */
hdd_image_log("VHD: Image is not fixed size\n");
free(vft);
vft = NULL;
fclose(hdd_images[id].file);
hdd_images[id].file = NULL;
memset(hdd[id].fn, 0, sizeof(hdd[id].fn));
return 0;
}
full_size = vft->orig_size;
hdd[id].tracks = vft->geom.cyl;
hdd[id].hpc = vft->geom.heads;
hdd[id].spt = vft->geom.spt;
free(vft);
vft = NULL;
} else if (is_vhd[1]) {
// full_size = VHD size in bytes
// hdd[id].tracks = VHD cylinders
// hdd[id].hpc = VHD heads
// hdd[id].spt = VHD spt
hdd_images[id].type = 3;
/* If we're here, this means there is a valid VHD footer in the
image, which means that by definition, all valid sectors
@@ -751,17 +447,7 @@ hdd_image_load(int id)
hdd_images[id].last_sector = (uint32_t) (full_size >> 9) - 1;
hdd_images[id].loaded = 1;
ret = 1;
}
if (is_vhd[0]) {
if (fseeko64(hdd_images[id].file, 0, SEEK_END) == -1)
fatal("hdd_image_load(): VHD: Error seeking to the end of file\n");
s = ftello64(hdd_images[id].file);
if (s == (full_size + hdd_images[id].base)) {
/* VHD image. */
hdd_image_gen_vft(id, &vft, full_size);
}
}
}
return ret;
}