|
| 1 | +#include "fd_hfork.h" |
| 2 | +#include "fd_hfork_private.h" |
| 3 | + |
| 4 | +static void |
| 5 | +check( fd_hfork_t * hfork, |
| 6 | + ulong total_stake, |
| 7 | + candidate_t * candidate, |
| 8 | + int invalid, |
| 9 | + fd_hash_t * our_bank_hash ) { |
| 10 | + |
| 11 | + if( FD_LIKELY( candidate->checked ) ) return; /* already checked this bank hash against our own */ |
| 12 | + if( FD_LIKELY( candidate->stake * 100UL / total_stake < 52UL ) ) return; /* not enough stake to compare */ |
| 13 | + |
| 14 | + if( FD_UNLIKELY( invalid ) ) { |
| 15 | + char msg[ 4096UL ]; |
| 16 | + FD_BASE58_ENCODE_32_BYTES( candidate->key.block_id.uc, _block_id ); |
| 17 | + FD_TEST( fd_cstr_printf_check( msg, sizeof( msg ), NULL, |
| 18 | + "HARD FORK DETECTED: our validator has marked slot %lu with block ID `%s` dead, but %lu validators with %.1f of stake have voted on it", |
| 19 | + candidate->slot, |
| 20 | + _block_id, |
| 21 | + candidate->cnt, |
| 22 | + 100.0*(double)candidate->stake/(double)total_stake ) ); |
| 23 | + |
| 24 | + if( FD_UNLIKELY( hfork->fatal ) ) FD_LOG_ERR (( "%s", msg )); |
| 25 | + else FD_LOG_WARNING(( "%s", msg )); |
| 26 | + } else if( FD_UNLIKELY( 0!=memcmp( our_bank_hash, &candidate->key.bank_hash, 32UL ) ) ) { |
| 27 | + char msg[ 4096UL ]; |
| 28 | + FD_BASE58_ENCODE_32_BYTES( our_bank_hash->uc, _our_bank_hash ); |
| 29 | + FD_BASE58_ENCODE_32_BYTES( candidate->key.block_id.uc, _block_id ); |
| 30 | + FD_BASE58_ENCODE_32_BYTES( candidate->key.bank_hash.uc, _bank_hash ); |
| 31 | + FD_TEST( fd_cstr_printf_check( msg, sizeof( msg ), NULL, |
| 32 | + "HARD FORK DETECTED: our validator has produced bank hash `%s` for slot %lu with block ID `%s`, but %lu validators with %.1f of stake have voted on a different bank hash `%s` for the same slot", |
| 33 | + _our_bank_hash, |
| 34 | + candidate->slot, |
| 35 | + _block_id, |
| 36 | + candidate->cnt, |
| 37 | + 100.0*(double)candidate->stake/(double)total_stake, |
| 38 | + _bank_hash ) ); |
| 39 | + |
| 40 | + if( FD_UNLIKELY( hfork->fatal ) ) FD_LOG_ERR (( "%s", msg )); |
| 41 | + else FD_LOG_WARNING(( "%s", msg )); |
| 42 | + } |
| 43 | + candidate->checked = 1; |
| 44 | +} |
| 45 | + |
| 46 | +ulong |
| 47 | +fd_hfork_align( void ) { |
| 48 | + return 128UL; |
| 49 | +} |
| 50 | + |
| 51 | +ulong |
| 52 | +fd_hfork_footprint( ulong max_live_slots, |
| 53 | + ulong max_vote_accounts ) { |
| 54 | + int lg_blk_max = fd_ulong_find_msb( fd_ulong_pow2_up( max_live_slots * max_vote_accounts ) ) + 1; |
| 55 | + int lg_vtr_max = fd_ulong_find_msb( fd_ulong_pow2_up( max_vote_accounts ) ) + 1; |
| 56 | + |
| 57 | + ulong l = FD_LAYOUT_INIT; |
| 58 | + l = FD_LAYOUT_APPEND( l, alignof(fd_hfork_t), sizeof(fd_hfork_t) ); |
| 59 | + l = FD_LAYOUT_APPEND( l, blk_map_align(), blk_map_footprint( lg_blk_max ) ); |
| 60 | + l = FD_LAYOUT_APPEND( l, vtr_map_align(), vtr_map_footprint( lg_vtr_max ) ); |
| 61 | + l = FD_LAYOUT_APPEND( l, candidate_map_align(), candidate_map_footprint( lg_blk_max ) ); |
| 62 | + for( ulong i = 0UL; i < fd_ulong_pow2( lg_vtr_max ); i++ ) { |
| 63 | + l = FD_LAYOUT_APPEND( l, votes_align(), votes_footprint( max_live_slots ) ); |
| 64 | + } |
| 65 | + return FD_LAYOUT_FINI( l, fd_hfork_align() ); |
| 66 | +} |
| 67 | + |
| 68 | +void * |
| 69 | +fd_hfork_new( void * shmem, |
| 70 | + ulong max_live_slots, |
| 71 | + ulong max_vote_accounts, |
| 72 | + ulong seed, |
| 73 | + int fatal ) { |
| 74 | + (void)seed; /* TODO map seed */ |
| 75 | + |
| 76 | + if( FD_UNLIKELY( !shmem ) ) { |
| 77 | + FD_LOG_WARNING(( "NULL mem" )); |
| 78 | + return NULL; |
| 79 | + } |
| 80 | + |
| 81 | + if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shmem, fd_hfork_align() ) ) ) { |
| 82 | + FD_LOG_WARNING(( "misaligned mem" )); |
| 83 | + return NULL; |
| 84 | + } |
| 85 | + |
| 86 | + ulong footprint = fd_hfork_footprint( max_live_slots, max_vote_accounts ); |
| 87 | + if( FD_UNLIKELY( !footprint ) ) { |
| 88 | + FD_LOG_WARNING(( "bad max_live_slots (%lu) or max_vote_accounts (%lu)", max_live_slots, max_vote_accounts )); |
| 89 | + return NULL; |
| 90 | + } |
| 91 | + |
| 92 | + fd_memset( shmem, 0, footprint ); |
| 93 | + |
| 94 | + int lg_blk_max = fd_ulong_find_msb( fd_ulong_pow2_up( max_live_slots * max_vote_accounts ) ) + 1; |
| 95 | + int lg_vtr_max = fd_ulong_find_msb( fd_ulong_pow2_up( max_vote_accounts ) ) + 1; |
| 96 | + |
| 97 | + FD_SCRATCH_ALLOC_INIT( l, shmem ); |
| 98 | + fd_hfork_t * hfork = FD_SCRATCH_ALLOC_APPEND( l, fd_hfork_align(), sizeof( fd_hfork_t ) ); |
| 99 | + void * blk_map = FD_SCRATCH_ALLOC_APPEND( l, blk_map_align(), blk_map_footprint( lg_blk_max ) ); |
| 100 | + void * vtr_map = FD_SCRATCH_ALLOC_APPEND( l, vtr_map_align(), vtr_map_footprint( lg_vtr_max ) ); |
| 101 | + void * candidate_map = FD_SCRATCH_ALLOC_APPEND( l, candidate_map_align(), candidate_map_footprint( lg_blk_max ) ); |
| 102 | + |
| 103 | + hfork->blk_map = blk_map_new( blk_map, lg_blk_max ); |
| 104 | + hfork->vtr_map = vtr_map_new( vtr_map, lg_vtr_max ); |
| 105 | + hfork->candidate_map = candidate_map_new( candidate_map, lg_blk_max ); |
| 106 | + for( ulong i = 0UL; i < fd_ulong_pow2( lg_vtr_max ); i++ ) { |
| 107 | + void * votes = FD_SCRATCH_ALLOC_APPEND( l, votes_align(), votes_footprint( max_live_slots ) ); |
| 108 | + vtr_t * join = vtr_map_join( hfork->vtr_map ); |
| 109 | + join[i].votes = votes_new( votes, max_live_slots ); |
| 110 | + } |
| 111 | + FD_TEST( FD_SCRATCH_ALLOC_FINI( l, fd_hfork_align() ) == (ulong)shmem + footprint ); |
| 112 | + hfork->fatal = fatal; |
| 113 | + return shmem; |
| 114 | +} |
| 115 | + |
| 116 | +fd_hfork_t * |
| 117 | +fd_hfork_join( void * shhfork ) { |
| 118 | + fd_hfork_t * hfork = (fd_hfork_t *)shhfork; |
| 119 | + |
| 120 | + if( FD_UNLIKELY( !hfork ) ) { |
| 121 | + FD_LOG_WARNING(( "NULL hfork" )); |
| 122 | + return NULL; |
| 123 | + } |
| 124 | + |
| 125 | + if( FD_UNLIKELY( !fd_ulong_is_aligned((ulong)hfork, fd_hfork_align() ) ) ) { |
| 126 | + FD_LOG_WARNING(( "misaligned hfork" )); |
| 127 | + return NULL; |
| 128 | + } |
| 129 | + |
| 130 | + hfork->blk_map = blk_map_join( hfork->blk_map ); |
| 131 | + hfork->vtr_map = vtr_map_join( hfork->vtr_map ); |
| 132 | + hfork->candidate_map = candidate_map_join( hfork->candidate_map ); |
| 133 | + for( ulong i = 0UL; i < vtr_map_slot_cnt( hfork->vtr_map ); i++ ) { |
| 134 | + hfork->vtr_map[i].votes = votes_join( hfork->vtr_map[i].votes ); |
| 135 | + } |
| 136 | + |
| 137 | + return hfork; |
| 138 | +} |
| 139 | + |
| 140 | +void * |
| 141 | +fd_hfork_leave( fd_hfork_t const * hfork ) { |
| 142 | + |
| 143 | + if( FD_UNLIKELY( !hfork ) ) { |
| 144 | + FD_LOG_WARNING(( "NULL hfork" )); |
| 145 | + return NULL; |
| 146 | + } |
| 147 | + |
| 148 | + return (void *)hfork; |
| 149 | +} |
| 150 | + |
| 151 | +void * |
| 152 | +fd_hfork_delete( void * hfork ) { |
| 153 | + |
| 154 | + if( FD_UNLIKELY( !hfork ) ) { |
| 155 | + FD_LOG_WARNING(( "NULL hfork" )); |
| 156 | + return NULL; |
| 157 | + } |
| 158 | + |
| 159 | + if( FD_UNLIKELY( !fd_ulong_is_aligned((ulong)hfork, fd_hfork_align() ) ) ) { |
| 160 | + FD_LOG_WARNING(( "misaligned hfork" )); |
| 161 | + return NULL; |
| 162 | + } |
| 163 | + |
| 164 | + return hfork; |
| 165 | +} |
| 166 | + |
| 167 | +void |
| 168 | +fd_hfork_count_vote( fd_hfork_t * hfork, |
| 169 | + fd_hash_t const * vote_acc, |
| 170 | + fd_hash_t const * block_id, |
| 171 | + fd_hash_t const * bank_hash, |
| 172 | + ulong slot, |
| 173 | + ulong stake, |
| 174 | + ulong total_stake, |
| 175 | + fd_hfork_metrics_t * metrics ) { |
| 176 | + |
| 177 | + /* Get the vtr. */ |
| 178 | + |
| 179 | + vtr_t * vtr = vtr_map_query( hfork->vtr_map, *vote_acc, NULL ); |
| 180 | + if( FD_UNLIKELY( !vtr ) ) vtr = vtr_map_insert( hfork->vtr_map, *vote_acc ); |
| 181 | + |
| 182 | + /* Ignore out of order or duplicate votes. */ |
| 183 | + |
| 184 | + if( FD_UNLIKELY( !votes_empty( vtr->votes ) ) ) { |
| 185 | + vote_t const * tail = votes_peek_tail_const( vtr->votes ); |
| 186 | + if( FD_UNLIKELY( tail && tail->slot >= slot ) ) return; |
| 187 | + } |
| 188 | + |
| 189 | + /* Evict the candidate's oldest vote (by vote slot). */ |
| 190 | + |
| 191 | + if( FD_UNLIKELY( votes_full( vtr->votes ) ) ) { |
| 192 | + vote_t vote = votes_pop_head( vtr->votes ); |
| 193 | + candidate_key_t key = { .block_id = vote.block_id, .bank_hash = vote.bank_hash }; |
| 194 | + candidate_t * candidate = candidate_map_query( hfork->candidate_map, key, NULL ); |
| 195 | + candidate->stake -= vote.stake; |
| 196 | + candidate->cnt--; |
| 197 | + if( FD_UNLIKELY( candidate->cnt==0 ) ) { |
| 198 | + candidate_map_remove( hfork->candidate_map, candidate ); |
| 199 | + blk_t * blk = blk_map_query( hfork->blk_map, vote.block_id, NULL ); |
| 200 | + blk->bank_hashes_cnt--; |
| 201 | + if( FD_UNLIKELY( blk->bank_hashes_cnt == 0 ) ) { |
| 202 | + blk_map_remove( hfork->blk_map, blk ); |
| 203 | + if( FD_UNLIKELY( blk->forked ) ) { |
| 204 | + metrics->active--; |
| 205 | + metrics->pruned++; |
| 206 | + } |
| 207 | + } |
| 208 | + } |
| 209 | + } |
| 210 | + |
| 211 | + /* Push the vote onto the vtr. */ |
| 212 | + |
| 213 | + vote_t vote = { .block_id = *block_id, .bank_hash = *bank_hash, .slot = slot, .stake = stake }; |
| 214 | + vtr->votes = votes_push_tail( vtr->votes, vote ); |
| 215 | + |
| 216 | + /* Update the hard fork candidate for this block id. */ |
| 217 | + |
| 218 | + candidate_key_t key = { .block_id = *block_id, .bank_hash = *bank_hash }; |
| 219 | + candidate_t * candidate = candidate_map_query( hfork->candidate_map, key, NULL ); |
| 220 | + if( FD_UNLIKELY( !candidate ) ) { |
| 221 | + candidate = candidate_map_insert( hfork->candidate_map, key ); |
| 222 | + candidate->slot = slot; |
| 223 | + candidate->stake = 0UL; |
| 224 | + candidate->cnt = 0UL; |
| 225 | + } |
| 226 | + candidate->cnt++; |
| 227 | + candidate->stake += stake; |
| 228 | + |
| 229 | + /* Update the list of bank hashes for this block_id. */ |
| 230 | + |
| 231 | + blk_t * blk = blk_map_query( hfork->blk_map, *block_id, NULL ); |
| 232 | + if( FD_UNLIKELY( !blk ) ) { |
| 233 | + FD_TEST( blk_map_key_cnt( hfork->blk_map ) < blk_map_key_max( hfork->blk_map ) ); /* invariant violation: blk_map full */ |
| 234 | + blk = blk_map_insert( hfork->blk_map, *block_id ); |
| 235 | + FD_TEST( blk ); |
| 236 | + blk->bank_hashes_cnt = 0; |
| 237 | + blk->replayed = 0; |
| 238 | + blk->invalid = 0; |
| 239 | + } |
| 240 | + int found = 0; |
| 241 | + for( ulong i=0UL; i<blk->bank_hashes_cnt; i++ ) { |
| 242 | + if( FD_LIKELY( 0==memcmp( &blk->bank_hashes[i], bank_hash, 32UL ) ) ) found = 1; |
| 243 | + } |
| 244 | + if( FD_UNLIKELY( !found ) ) { |
| 245 | + blk->bank_hashes[ blk->bank_hashes_cnt++ ] = *bank_hash; |
| 246 | + |
| 247 | + /* Found a hard fork. */ |
| 248 | + |
| 249 | + if( FD_UNLIKELY( !blk->forked && blk->bank_hashes_cnt > 1 ) ) { |
| 250 | + blk->forked = 1; |
| 251 | + metrics->seen++; |
| 252 | + metrics->active++; |
| 253 | + } |
| 254 | + } |
| 255 | + metrics->max_width = fd_ulong_max( metrics->max_width, blk->bank_hashes_cnt ); |
| 256 | + |
| 257 | + /* Check for hard forks. */ |
| 258 | + |
| 259 | + if( FD_LIKELY( blk->replayed ) ) check( hfork, total_stake, candidate, blk->invalid, &blk->our_bank_hash ); |
| 260 | +} |
| 261 | + |
| 262 | +void |
| 263 | +fd_hfork_record_our_bank_hash( fd_hfork_t * hfork, |
| 264 | + fd_hash_t * block_id, |
| 265 | + fd_hash_t * bank_hash, |
| 266 | + ulong total_stake ) { |
| 267 | + blk_t * blk = blk_map_query( hfork->blk_map, *block_id, NULL ); |
| 268 | + if( FD_UNLIKELY( !blk ) ) { |
| 269 | + blk = blk_map_insert( hfork->blk_map, *block_id ); |
| 270 | + FD_TEST( blk ); |
| 271 | + blk->bank_hashes_cnt = 0UL; |
| 272 | + blk->replayed = 1; |
| 273 | + } |
| 274 | + if( FD_LIKELY( bank_hash ) ) { blk->invalid = 0; blk->our_bank_hash = *bank_hash; } |
| 275 | + else blk->invalid = 1; |
| 276 | + |
| 277 | + for( ulong i=0UL; i<blk->bank_hashes_cnt; i++ ) { |
| 278 | + candidate_key_t key = { .block_id = *block_id, .bank_hash = blk->bank_hashes[i] }; |
| 279 | + candidate_t * candidate = candidate_map_query( hfork->candidate_map, key, NULL ); |
| 280 | + if( FD_LIKELY( candidate ) ) check( hfork, total_stake, candidate, blk->invalid, &blk->our_bank_hash ); |
| 281 | + } |
| 282 | +} |
0 commit comments