static int
unparse_media_hard_drive_path(char *buffer, EFI_DEVICE_PATH *path)
{
HARDDRIVE_DEVICE_PATH *hd = (HARDDRIVE_DEVICE_PATH *)path;
char text_uuid[40], *sig=text_uuid;
char a[16], b[16], c[16];
switch (hd->signature_type) {
case 0x00:
sprintf(sig, "None");
break;
case 0x01:
sprintf(sig, "%08x", *(uint32_t *)memcpy(a, &hd->signature,
sizeof(hd->signature)));
break;
case 0x02: /* GPT */
efi_guid_unparse((efi_guid_t *)hd->signature, sig);
break;
default:
break;
}
return sprintf(buffer, "HD(%x,%" PRIx64 ",%" PRIx64 ",%s)",
get(a, hd->part_num),
get(b, hd->start),
get(c, hd->size),
sig);
}
/**
* efi_partition(struct parsed_partitions *state)
* @state
*
* Description: called from check.c, if the disk contains GPT
* partitions, sets up partition entries in the kernel.
*
* If the first block on the disk is a legacy MBR,
* it will get handled by msdos_partition().
* If it's a Protective MBR, we'll handle it here.
*
* We do not create a Linux partition for GPT, but
* only for the actual data partitions.
* Returns:
* -1 if unable to read the partition table
* 0 if this isn't our partition table
* 1 if successful
*
*/
int efi_partition(struct parsed_partitions *state)
{
gpt_header *gpt = NULL;
gpt_entry *ptes = NULL;
u32 i;
unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
u8 unparsed_guid[37];
if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
kfree(ptes);
return 0;
}
pr_debug("GUID Partition Table is valid! Yea!\n");
for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
struct partition_meta_info *info;
unsigned label_count = 0;
unsigned label_max;
u64 start = le64_to_cpu(ptes[i].starting_lba);
u64 size = le64_to_cpu(ptes[i].ending_lba) -
le64_to_cpu(ptes[i].starting_lba) + 1ULL;
if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
continue;
put_partition(state, i+1, start * ssz, size * ssz);
/* If this is a RAID volume, tell md */
if (!efi_guidcmp(ptes[i].partition_type_guid,
PARTITION_LINUX_RAID_GUID))
state->parts[i + 1].flags = ADDPART_FLAG_RAID;
info = &state->parts[i + 1].info;
/* Instead of doing a manual swap to big endian, reuse the
* common ASCII hex format as the interim.
*/
efi_guid_unparse(&ptes[i].unique_partition_guid, unparsed_guid);
part_pack_uuid(unparsed_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(sizeof(info->volname) - 1,
sizeof(ptes[i].partition_name));
info->volname[label_max] = 0;
while (label_count < label_max) {
u8 c = ptes[i].partition_name[label_count] & 0xff;
if (c && !isprint(c))
c = '!';
info->volname[label_count] = c;
label_count++;
}
state->parts[i + 1].has_info = true;
}
kfree(ptes);
kfree(gpt);
strlcat(state->pp_buf, "\n", PAGE_SIZE);
return 1;
}
static void
fill_bootvar_name(char *dest, size_t len, const char *name)
{
efi_guid_t guid = EFI_GLOBAL_VARIABLE;
char text_uuid[40];
efi_guid_unparse(&guid, text_uuid);
snprintf(dest, len, "%s-%s", name, text_uuid);
}
static int
unparse_vendor_path(char *buffer, VENDOR_DEVICE_PATH *path)
{
char text_guid[40], *p = buffer;
unsigned char *q = (uint8_t *)path + 20;
efi_guid_unparse(&path->vendor_guid, text_guid);
p += sprintf(p, "Vendor(%s,", text_guid);
p += unparse_raw(p, q, path->length - 20);
p += sprintf(p, ")");
return p - buffer;
}
static ssize_t
efivar_guid_read(struct efivar_entry *entry, char *buf)
{
struct efi_variable *var = &entry->var;
char *str = buf;
if (!entry || !buf)
return 0;
efi_guid_unparse(&var->VendorGuid, str);
str += strlen(str);
str += sprintf(str, "\n");
return str - buf;
}
/**
* efivar_create_sysfs_entry - create a new entry in sysfs
* @new_var: efivar entry to create
*
* Returns 1 on failure, 0 on success
*/
static int
efivar_create_sysfs_entry(struct efivar_entry *new_var)
{
int i, short_name_size;
char *short_name;
unsigned long variable_name_size;
efi_char16_t *variable_name;
variable_name = new_var->var.VariableName;
variable_name_size = ucs2_strlen(variable_name) * sizeof(efi_char16_t);
/*
* Length of the variable bytes in ASCII, plus the '-' separator,
* plus the GUID, plus trailing NUL
*/
short_name_size = variable_name_size / sizeof(efi_char16_t)
+ 1 + EFI_VARIABLE_GUID_LEN + 1;
short_name = kzalloc(short_name_size, GFP_KERNEL);
if (!short_name)
return 1;
/* Convert Unicode to normal chars (assume top bits are 0),
ala UTF-8 */
for (i=0; i < (int)(variable_name_size / sizeof(efi_char16_t)); i++) {
short_name[i] = variable_name[i] & 0xFF;
}
/* This is ugly, but necessary to separate one vendor's
private variables from another's. */
*(short_name + strlen(short_name)) = '-';
efi_guid_unparse(&new_var->var.VendorGuid,
short_name + strlen(short_name));
new_var->kobj.kset = efivars_kset;
i = kobject_init_and_add(&new_var->kobj, &efivar_ktype,
NULL, "%s", short_name);
kfree(short_name);
if (i)
return 1;
kobject_uevent(&new_var->kobj, KOBJ_ADD);
efivar_entry_add(new_var, &efivar_sysfs_list);
return 0;
}
static int
unparse_media_path(char *buffer, EFI_DEVICE_PATH *path)
{
CDROM_DEVICE_PATH *cdrom = (CDROM_DEVICE_PATH *)path;
MEDIA_PROTOCOL_DEVICE_PATH *media = (MEDIA_PROTOCOL_DEVICE_PATH *)path;
FILE_PATH_DEVICE_PATH *file = (FILE_PATH_DEVICE_PATH *)path;
char text_guid[40], *p = buffer;
char file_name[80];
memset(file_name, 0, sizeof(file_name));
char a[16], b[16], c[16];
switch (path->subtype) {
case 1:
return unparse_media_hard_drive_path(buffer, path);
break;
case 2:
return sprintf(buffer, "CD-ROM(%x,%" PRIx64 ",%" PRIx64 ")",
get(a, cdrom->boot_entry), get(b, cdrom->start), get(c, cdrom->size));
break;
case 3:
return unparse_vendor_path(buffer, (VENDOR_DEVICE_PATH *)path);
break;
case 4:
efichar_to_char(file_name, file->path_name, 80);
return sprintf(p, "File(%s)", file_name);
break;
case 5:
efi_guid_unparse(&media->guid, text_guid);
return sprintf(buffer, "Media(%s)", text_guid);
break;
default:
break;
}
return 0;
}
/**
* find_valid_gpt() - Search disk for valid GPT headers and PTEs
* @state
* @gpt is a GPT header ptr, filled on return.
* @ptes is a PTEs ptr, filled on return.
* Description: Returns 1 if valid, 0 on error.
* If valid, returns pointers to newly allocated GPT header and PTEs.
* Validity depends on PMBR being valid (or being overridden by the
* 'gpt' kernel command line option) and finding either the Primary
* GPT header and PTEs valid, or the Alternate GPT header and PTEs
* valid. If the Primary GPT header is not valid, the Alternate GPT header
* is not checked unless the 'gpt' kernel command line option is passed.
* This protects against devices which misreport their size, and forces
* the user to decide to use the Alternate GPT.
*/
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;
gpt_header *pgpt = NULL, *agpt = NULL;
gpt_entry *pptes = NULL, *aptes = NULL;
legacy_mbr *legacymbr;
u64 lastlba;
if (!ptes)
return 0;
lastlba = last_lba(state->bdev);
#if 0 // merged from msm8960-gb by ZTE_BOOT_JIA_20120105 jia.jia
if (!force_gpt) {
#else
if (force_gpt) {
#endif
/* This will be added to the EFI Spec. per Intel after v1.02. */
legacymbr = kzalloc(sizeof (*legacymbr), GFP_KERNEL);
if (legacymbr) {
read_lba(state, 0, (u8 *) legacymbr,
sizeof (*legacymbr));
good_pmbr = is_pmbr_valid(legacymbr);
kfree(legacymbr);
}
if (!good_pmbr)
goto fail;
}
good_pgpt = is_gpt_valid(state, GPT_PRIMARY_PARTITION_TABLE_LBA,
&pgpt, &pptes);
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);
/* The obviously unsuccessful case */
if (!good_pgpt && !good_agpt)
goto fail;
compare_gpts(pgpt, agpt, lastlba);
/* The good cases */
if (good_pgpt) {
*gpt = pgpt;
*ptes = pptes;
kfree(agpt);
kfree(aptes);
if (!good_agpt) {
printk(KERN_WARNING
"Alternate GPT is invalid, "
"using primary GPT.\n");
}
return 1;
}
else if (good_agpt) {
*gpt = agpt;
*ptes = aptes;
kfree(pgpt);
kfree(pptes);
printk(KERN_WARNING
"Primary GPT is invalid, using alternate GPT.\n");
return 1;
}
fail:
kfree(pgpt);
kfree(agpt);
kfree(pptes);
kfree(aptes);
*gpt = NULL;
*ptes = NULL;
return 0;
}
/**
* efi_partition(struct parsed_partitions *state)
* @state
*
* Description: called from check.c, if the disk contains GPT
* partitions, sets up partition entries in the kernel.
*
* If the first block on the disk is a legacy MBR,
* it will get handled by msdos_partition().
* If it's a Protective MBR, we'll handle it here.
*
* We do not create a Linux partition for GPT, but
* only for the actual data partitions.
* Returns:
* -1 if unable to read the partition table
* 0 if this isn't our partition table
* 1 if successful
*
*/
int efi_partition(struct parsed_partitions *state)
{
gpt_header *gpt = NULL;
gpt_entry *ptes = NULL;
u32 i;
unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
u8 unparsed_guid[37];
if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
kfree(ptes);
return 0;
}
pr_debug("GUID Partition Table is valid! Yea!\n");
for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
struct partition_meta_info *info;
unsigned label_count = 0;
unsigned label_max;
u64 start = le64_to_cpu(ptes[i].starting_lba);
u64 size = le64_to_cpu(ptes[i].ending_lba) -
le64_to_cpu(ptes[i].starting_lba) + 1ULL;
if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
continue;
put_partition(state, i+1, start * ssz, size * ssz);
/* If this is a RAID volume, tell md */
if (!efi_guidcmp(ptes[i].partition_type_guid,
PARTITION_LINUX_RAID_GUID))
state->parts[i + 1].flags = ADDPART_FLAG_RAID;
info = &state->parts[i + 1].info;
/* Instead of doing a manual swap to big endian, reuse the
* common ASCII hex format as the interim.
*/
efi_guid_unparse(&ptes[i].unique_partition_guid, unparsed_guid);
part_pack_uuid(unparsed_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(sizeof(info->volname) - 1,
sizeof(ptes[i].partition_name));
info->volname[label_max] = 0;
while (label_count < label_max) {
u8 c = ptes[i].partition_name[label_count] & 0xff;
if (c && !isprint(c))
c = '!';
info->volname[label_count] = c;
label_count++;
}
state->parts[i + 1].has_info = true;
}
kfree(ptes);
kfree(gpt);
strlcat(state->pp_buf, "\n", PAGE_SIZE);
return 1;
}
static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor,
unsigned long name_size, void *data)
{
struct super_block *sb = (struct super_block *)data;
struct efivar_entry *entry;
struct inode *inode = NULL;
struct dentry *dentry, *root = sb->s_root;
unsigned long size = 0;
char *name;
int len;
int err = -ENOMEM;
bool is_removable = false;
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return err;
memcpy(entry->var.VariableName, name16, name_size);
memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t));
len = ucs2_utf8size(entry->var.VariableName);
/* name, plus '-', plus GUID, plus NUL*/
name = kmalloc(len + 1 + EFI_VARIABLE_GUID_LEN + 1, GFP_KERNEL);
if (!name)
goto fail;
ucs2_as_utf8(name, entry->var.VariableName, len);
if (efivar_variable_is_removable(entry->var.VendorGuid, name, len))
is_removable = true;
name[len] = '-';
efi_guid_unparse(&entry->var.VendorGuid, name + len + 1);
name[len + EFI_VARIABLE_GUID_LEN+1] = '\0';
inode = efivarfs_get_inode(sb, root->d_inode, S_IFREG | 0644, 0,
is_removable);
if (!inode)
goto fail_name;
dentry = efivarfs_alloc_dentry(root, name);
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
goto fail_inode;
}
/* copied by the above to local storage in the dentry. */
kfree(name);
efivar_entry_size(entry, &size);
efivar_entry_add(entry, &efivarfs_list);
mutex_lock(&inode->i_mutex);
inode->i_private = entry;
i_size_write(inode, size + sizeof(entry->var.Attributes));
mutex_unlock(&inode->i_mutex);
d_add(dentry, inode);
return 0;
fail_inode:
iput(inode);
fail_name:
kfree(name);
fail:
kfree(entry);
return err;
}
/**
* efi_partition(struct parsed_partitions *state)
* @state
*
* Description: called from check.c, if the disk contains GPT
* partitions, sets up partition entries in the kernel.
*
* If the first block on the disk is a legacy MBR,
* it will get handled by msdos_partition().
* If it's a Protective MBR, we'll handle it here.
*
* We do not create a Linux partition for GPT, but
* only for the actual data partitions.
* Returns:
* -1 if unable to read the partition table
* 0 if this isn't our partition table
* 1 if successful
*
*/
int efi_partition(struct parsed_partitions *state)
{
char* partition_name = NULL;
gpt_header *gpt = NULL;
gpt_entry *ptes = NULL;
u32 i;
unsigned ssz = bdev_logical_block_size(state->bdev) / 512;
partition_name = kzalloc(sizeof(ptes->partition_name), GFP_KERNEL);
if (!partition_name)
return 0;
if (!find_valid_gpt(state, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
kfree(ptes);
kfree(partition_name);
return 0;
}
pr_debug("GUID Partition Table is valid! Yea!\n");
proc_create("emmc", 0666, NULL, &emmc_partition_fops);
gpt_info.num_of_partitions = le32_to_cpu(gpt->num_partition_entries);
gpt_info.erase_size = bdev_erase_size(state->bdev) * ssz;
/*
* Not certain if there is a chance this function is called again with
* a different GPT. In case there is, free previously allocated memory
*/
kfree(gpt_info.partitions);
gpt_info.partitions = kzalloc(gpt_info.num_of_partitions
* sizeof(*gpt_info.partitions), GFP_KERNEL);
for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
int partition_name_len;
struct partition_meta_info *info;
unsigned label_count = 0;
unsigned label_max;
u64 start = le64_to_cpu(ptes[i].starting_lba);
u64 size = le64_to_cpu(ptes[i].ending_lba) -
le64_to_cpu(ptes[i].starting_lba) + 1ULL;
gpt_info.partitions[i].size = size * ssz;
if (!is_pte_valid(&ptes[i], last_lba(state->bdev)))
continue;
partition_name_len = utf16s_to_utf8s(ptes[i].partition_name,
sizeof(ptes[i].partition_name),
UTF16_LITTLE_ENDIAN,
partition_name,
sizeof(ptes[i].partition_name));
#ifdef CONFIG_APANIC_ON_MMC
if(strncmp(partition_name,CONFIG_APANIC_PLABEL,partition_name_len) == 0) {
apanic_partition_start = start * ssz;
apanic_partition_size = size * ssz;
pr_debug("apanic partition found starts at %lu \r\n",
apanic_partition_start);
pr_debug("apanic partition size = %lu\n",
apanic_partition_size);
}
#endif
put_partition(state, i+1, start * ssz, size * ssz);
/* If this is a RAID volume, tell md */
if (!efi_guidcmp(ptes[i].partition_type_guid,
PARTITION_LINUX_RAID_GUID))
state->parts[i + 1].flags = ADDPART_FLAG_RAID;
info = &state->parts[i + 1].info;
efi_guid_unparse(&ptes[i].unique_partition_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(sizeof(info->volname) - 1,
sizeof(ptes[i].partition_name));
info->volname[label_max] = 0;
while (label_count < label_max) {
u8 c = ptes[i].partition_name[label_count] & 0xff;
if (c && !isprint(c))
c = '!';
info->volname[label_count] = c;
if (label_count <= partition_name_len)
gpt_info.partitions[i].volname[label_count] = c;
label_count++;
}
state->parts[i + 1].has_info = true;
#ifdef CONFIG_APANIC_ON_MMC
if(strncmp(info->volname,CONFIG_APANIC_PLABEL,label_count) == 0) {
apanic_partition_start = start * ssz;
pr_debug("apanic partition found starts at %lu \r\n", apanic_partition_start);
}
#endif
}
kfree(ptes);
kfree(gpt);
kfree(partition_name);
strlcat(state->pp_buf, "\n", PAGE_SIZE);
return 1;
}
/**
* efi_partition(struct parsed_partitions *state, struct block_device *bdev)
* @state
* @bdev
*
* Description: called from check.c, if the disk contains GPT
* partitions, sets up partition entries in the kernel.
*
* If the first block on the disk is a legacy MBR,
* it will get handled by msdos_partition().
* If it's a Protective MBR, we'll handle it here.
*
* We do not create a Linux partition for GPT, but
* only for the actual data partitions.
* Returns:
* -1 if unable to read the partition table
* 0 if this isn't our partition table
* 1 if successful
*
*/
int
efi_partition(struct parsed_partitions *state, struct block_device *bdev)
{
gpt_header *gpt = NULL;
gpt_entry *ptes = NULL;
u32 i;
unsigned ssz = bdev_logical_block_size(bdev) / 512;
u8 unparsed_guid[37];
if (!find_valid_gpt(bdev, &gpt, &ptes) || !gpt || !ptes) {
kfree(gpt);
kfree(ptes);
return 0;
}
pr_debug("GUID Partition Table is valid! Yea!\n");
for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
struct partition_meta_info *info;
unsigned label_count = 0;
unsigned label_max;
u64 start = le64_to_cpu(ptes[i].starting_lba);
u64 size = le64_to_cpu(ptes[i].ending_lba) -
le64_to_cpu(ptes[i].starting_lba) + 1ULL;
if (!is_pte_valid(&ptes[i], last_lba(bdev)))
continue;
put_partition(state, i+1, start * ssz, size * ssz);
/* If this is a RAID volume, tell md */
if (!efi_guidcmp(ptes[i].partition_type_guid,
PARTITION_LINUX_RAID_GUID))
state->parts[i+1].flags = 1;
info = &state->parts[i + 1].info;
/* The EFI specification diverges from RFC 4122 with respect to
* the packed storage of its UUIDs. efi_guid_unparse unpacks to
* a common ASCII representation, which allows part_pack_uuid to
* pack it in the standard big endian layout for use by the rest
* of the kernel.
*/
efi_guid_unparse(&ptes[i].unique_partition_guid, unparsed_guid);
part_pack_uuid(unparsed_guid, info->uuid);
/* Naively convert UTF16-LE to 7 bits. */
label_max = min(sizeof(info->volname) - 1,
sizeof(ptes[i].partition_name));
info->volname[label_max] = 0;
while (label_count < label_max) {
u8 c = ptes[i].partition_name[label_count] & 0xff;
if (c && !isprint(c))
c = '!';
info->volname[label_count] = c;
label_count++;
}
state->parts[i + 1].has_info = true;
}
kfree(ptes);
kfree(gpt);
printk("\n");
return 1;
}
