/**
* Based on fs/ext3/super.c:1630. Can't use bread, however.
*/
extern int ljx_ext3_fill_super(
struct xen_vbd *vbd,
struct ext3_super_block *sb,
int silent
) {
struct ljx_ext3_superblock *lsb;
struct ljx_ext3_superblock **pp_lsb;
struct label *label;
unsigned int blocksize, db_count, i, block, groups_left;
lsb = kzalloc(sizeof(struct ljx_ext3_superblock), GFP_KERNEL);
if (! lsb)
return -ENOMEM;
pp_lsb = &vbd->superblock;
*pp_lsb = lsb;
/* compute blocksize
minsize = bdev_logical_block_size(vbd->bdev);
size = EXT3_MIN_BLOCK_SIZE;
if (size < minsize)
size = minsize;
*/
blocksize = vbd->bdev->bd_block_size;
lsb->inodes_count = le32_to_cpu(sb->s_inodes_count);
lsb->blocks_count = le32_to_cpu(sb->s_blocks_count);
lsb->inode_size = le32_to_cpu(sb->s_inode_size);
lsb->first_data_block = le32_to_cpu(sb->s_first_data_block);
lsb->log_block_size = le32_to_cpu(sb->s_log_block_size);
lsb->log_frag_size = le32_to_cpu(sb->s_log_frag_size);
lsb->blocks_per_group = le32_to_cpu(sb->s_blocks_per_group);
lsb->frags_per_group = le32_to_cpu(sb->s_frags_per_group);
lsb->inodes_per_group = le32_to_cpu(sb->s_inodes_per_group);
lsb->first_inode = le32_to_cpu(sb->s_first_ino);
lsb->journal_inum = le32_to_cpu(sb->s_journal_inum);
lsb->inodes_per_block = blocksize / le32_to_cpu(sb->s_inode_size);
lsb->desc_per_block = blocksize / sizeof(struct ext3_group_desc);
lsb->groups_count = ((le32_to_cpu(sb->s_blocks_count) -
le32_to_cpu(sb->s_first_data_block) - 1)
/ lsb->blocks_per_group) + 1;
lsb->first_meta_bg = le32_to_cpu(sb->s_first_meta_bg);
lsb->feature_incompat = le32_to_cpu(sb->s_feature_incompat);
lsb->feature_ro_compat = le32_to_cpu(sb->s_feature_ro_compat);
lsb->block_size = EXT3_MIN_BLOCK_SIZE << lsb->log_block_size;
db_count = DIV_ROUND_UP(lsb->groups_count, lsb->desc_per_block);
lsb->group_desc = kzalloc(db_count * sizeof(struct ljx_ext3_group_desc *),
GFP_KERNEL);
if (lsb->group_desc == NULL)
return -ENOMEM;
lsb->group_desc = kzalloc(db_count * sizeof(*lsb->group_desc), GFP_KERNEL);
groups_left = lsb->groups_count;
for (i = 0; i < db_count; i++) {
block = descriptor_loc(lsb, i);
lsb->group_desc[i].init = false;
lsb->group_desc[i].location = block;
JPRINTK("group desc at %u", block);
label = insert_label(
&vbd->label_list,
block,
8,
GROUP_DESC
);
label->processor = &process_group_desc;
}
JPRINTK("Total number of groups: %u", lsb->groups_count);
print_label_list(&vbd->label_list);
return 0;
}
/*
* interactively select a kernel image and options.
* The kernel can be an actual filename or a label in the config file
* Return:
* -1: if unsucessful
* 0: otherwise
*/
static INTN
select_kernel(CHAR16 *buffer, INTN size)
{
#define CHAR_CTRL_C L'\003' /* Unicode CTRL-C */
#define CHAR_CTRL_D L'\004' /* Unicode CTRL-D */
#define CHAR_CTRL_U L'\025' /* Unicode CTRL-U */
//#define CHAR_TAB L'\t'
SIMPLE_INPUT_INTERFACE *ip = systab->ConIn;
EFI_INPUT_KEY key;
EFI_STATUS status;
INTN pos = 0, ret;
INT8 first_time = 1;
/*
* let's give some help first
*/
print_help(0);
print_infos(0);
reprint:
buffer[pos] = CHAR_NULL;
Print(L"\nELILO boot: %s", buffer);
/*
* autoboot with default choice after timeout expires
*/
if (first_time && (ret=wait_timeout(elilo_opt.timeout)) != 1) {
return ret == -1 ? -1: 0;
}
first_time = 0;
for (;;) {
while ((status = uefi_call_wrapper(ip->ReadKeyStroke, 2, ip, &key))
== EFI_NOT_READY);
if (EFI_ERROR(status)) {
ERR_PRT((L"select_kernel readkey: %r", status));
return -1;
}
switch (key.UnicodeChar) {
case CHAR_TAB:
Print(L"\n");
if (pos == 0) {
print_label_list();
Print(L"(or a kernel file name: [[dev_name:/]path/]kernel_image cmdline options)\n");
} else {
buffer[pos] = CHAR_NULL;
display_label_info(buffer);
}
goto reprint;
case L'%':
if (pos>0) goto normal_char;
Print(L"\n");
print_vars();
goto reprint;
case L'?':
if (pos>0) goto normal_char;
Print(L"\n");
print_help(1);
goto reprint;
case L'&':
if (pos>0) goto normal_char;
Print(L"\n");
print_infos(1);
goto reprint;
case L'=':
if (pos>0) goto normal_char;
Print(L"\n");
print_devices();
goto reprint;
case CHAR_BACKSPACE:
if (pos == 0) break;
pos--;
Print(L"\b \b");
break;
case CHAR_CTRL_U: /* clear line */
while (pos) {
Print(L"\b \b");
pos--;
}
break;
case CHAR_CTRL_C: /* kill line */
pos = 0;
goto reprint;
case CHAR_LINEFEED:
case CHAR_CARRIAGE_RETURN:
buffer[pos] = CHAR_NULL;
Print(L"\n");
return 0;
default:
normal_char:
if (key.UnicodeChar == CHAR_CTRL_D || key.ScanCode == 0x17 ) {
Print(L"\nGiving up then...\n");
return -1;
}
if (key.UnicodeChar == CHAR_NULL) break;
if (pos > size-1) break;
buffer[pos++] = key.UnicodeChar;
/* Write the character out */
Print(L"%c", key.UnicodeChar);
}
}
return 0;
}