//================================================================================================================================
// NWEB
//================================================================================================================================
int WEB_LISTENSOCKET(int weblisten)
{
//return values:
//TODO
int len, websocket;
struct sockaddr_in cli_addr;
len = sizeof(cli_addr);
if ((websocket = accept(weblisten, (struct sockaddr *)&cli_addr, &len)) < 0)
{
libc_printf(HEADER" error system call accept\n");
return -1;
}
apply_block(websocket, SOCKETBLOCK);
webcheck(websocket);
apply_block(websocket, SOCKNONBLOCK);
return 0;
}
int alloc_disk_blockno(INODE *pinode, uint32_t file_blockst, uint32_t nr_block)
{
int i, count = 0;
int level[128] = {0};
uint32_t addr[128] = {0}, stno[128] = {0};
uint32_t p = 0, q = 0;
uint32_t ll[4] = {L1_ST, L2_ST, L3_ST, L4_ST};
uint32_t lp[4] = {1, L2_ST - L1_ST, L3_ST - L2_ST, L4_ST - L3_ST};
uint32_t tbuf[BLOCKSZ / sizeof(uint32_t)];
if(nr_block > 64)
return 0;
for(i = 0; i < 10; i++)
if(i >= file_blockst && i < file_blockst + nr_block)
{
level[q] = 0;
stno[q] = i;
if(pinode->nr_block[i] == INVALID_BLOCKNO)
pinode->nr_block[i] = apply_block();
addr[q++] = pinode->nr_block[i];
}
for(i = 0; i < 3; i++)
if(max(ll[i], file_blockst) < min(ll[i + 1], file_blockst + nr_block))
{
level[q] = i + 1;
stno[q] = ll[i];
if(pinode->nr_block[10 + i] == INVALID_BLOCKNO)
{
pinode->nr_block[10 + i] = apply_block();
clear_block(pinode->nr_block[10 + i]);
}
addr[q++] = pinode->nr_block[10 + i];
}
if(q == 0)
return 0;
while(p < q)
{
if(level[p] > 0)
{
uint32_t disk_off = FILE_ST + addr[p] * BLOCKSZ;
read_disk(tbuf, disk_off, sizeof(tbuf));
for(i = 0; i < sizeof(tbuf)/sizeof(uint32_t); i++)
{
level[q] = level[p] - 1;
stno[q] = stno[p] + i * lp[level[q]];
stno[q + 1] = stno[p] + (i + 1) * lp[level[q]];
if(max(stno[q], file_blockst) < min(stno[q + 1], file_blockst + nr_block))
{
if(tbuf[i] == INVALID_BLOCKNO)
{
tbuf[i] = apply_block();
if(level[q] > 0)
clear_block(tbuf[i]);
}
addr[q] = tbuf[i];
q++;
}
}
p ++;
write_disk(tbuf, disk_off, sizeof(tbuf));
assert(p < 128 && q < 128);
}
else
{
assert(p < 128 && q < 128);
count ++;
if(count >= nr_block)
{
return count;
}
p++;
}
}
printk("%d, %d, %d\n", file_blockst, nr_block, count);
return count;
}
bool database::_push_block(const signed_block& new_block)
{ try {
uint32_t skip = get_node_properties().skip_flags;
if( !(skip&skip_fork_db) )
{
/// TODO: if the block is greater than the head block and before the next maitenance interval
// verify that the block signer is in the current set of active witnesses.
shared_ptr<fork_item> new_head = _fork_db.push_block(new_block);
//If the head block from the longest chain does not build off of the current head, we need to switch forks.
if( new_head->data.previous != head_block_id() )
{
//If the newly pushed block is the same height as head, we get head back in new_head
//Only switch forks if new_head is actually higher than head
if( new_head->data.block_num() > head_block_num() )
{
wlog( "Switching to fork: ${id}", ("id",new_head->data.id()) );
auto branches = _fork_db.fetch_branch_from(new_head->data.id(), head_block_id());
// pop blocks until we hit the forked block
while( head_block_id() != branches.second.back()->data.previous )
pop_block();
// push all blocks on the new fork
for( auto ritr = branches.first.rbegin(); ritr != branches.first.rend(); ++ritr )
{
ilog( "pushing blocks from fork ${n} ${id}", ("n",(*ritr)->data.block_num())("id",(*ritr)->data.id()) );
optional<fc::exception> except;
try {
undo_database::session session = _undo_db.start_undo_session();
apply_block( (*ritr)->data, skip );
_block_id_to_block.store( (*ritr)->id, (*ritr)->data );
session.commit();
}
catch ( const fc::exception& e ) { except = e; }
if( except )
{
wlog( "exception thrown while switching forks ${e}", ("e",except->to_detail_string() ) );
// remove the rest of branches.first from the fork_db, those blocks are invalid
while( ritr != branches.first.rend() )
{
_fork_db.remove( (*ritr)->data.id() );
++ritr;
}
_fork_db.set_head( branches.second.front() );
// pop all blocks from the bad fork
while( head_block_id() != branches.second.back()->data.previous )
pop_block();
// restore all blocks from the good fork
for( auto ritr = branches.second.rbegin(); ritr != branches.second.rend(); ++ritr )
{
auto session = _undo_db.start_undo_session();
apply_block( (*ritr)->data, skip );
_block_id_to_block.store( new_block.id(), (*ritr)->data );
session.commit();
}
throw *except;
}
}
return true;
}
else return false;
}
}
try {
auto session = _undo_db.start_undo_session();
apply_block(new_block, skip);
_block_id_to_block.store(new_block.id(), new_block);
session.commit();
} catch ( const fc::exception& e ) {
elog("Failed to push new block:\n${e}", ("e", e.to_detail_string()));
_fork_db.remove(new_block.id());
throw;
}
return false;
} FC_CAPTURE_AND_RETHROW( (new_block) ) }