Line data    Source code

       1             : #include "../../disco/topo/fd_topo.h"
       2             : #include "../../disco/metrics/fd_metrics.h"
       3             : #include "../../ballet/lthash/fd_lthash.h"
       4             : #include "../../flamenco/runtime/fd_hashes.h"
       5             : 
       6             : #include "utils/fd_ssctrl.h"
       7             : 
       8             : #include "generated/fd_snapls_tile_seccomp.h"
       9             : 
      10             : #define NAME "snapls"
      11             : 
      12           0 : #define IN_KIND_SNAPIN (0)
      13           0 : #define IN_KIND_SNAPLA (1)
      14             : #define MAX_IN_LINKS   (1 + FD_SNAPSHOT_MAX_SNAPLA_TILES)
      15             : 
      16             : struct fd_snapls_tile {
      17             :   int state;
      18             :   int full;
      19             : 
      20             :   fd_lthash_value_t running_lthash;
      21             : 
      22             :   fd_blake3_t b3[1];
      23             :   ulong       acc_data_sz;
      24             :   int         hash_account;
      25             :   ulong       num_hash_tiles;
      26             : 
      27             :   uchar in_kind[ MAX_IN_LINKS ];
      28             :   ulong adder_in_offset;
      29             : 
      30             :   ulong num_acks;
      31             :   uchar acks[ 1 + FD_SNAPSHOT_MAX_SNAPLA_TILES ];
      32             : 
      33             :   struct {
      34             :     fd_lthash_value_t expected_lthash;
      35             :     fd_lthash_value_t calculated_lthash;
      36             :     ulong received_lthashes;
      37             :     ulong ack_sig;
      38             :     int   awaiting_ack;
      39             :     int   hash_check_done;
      40             :   } hash_accum;
      41             : 
      42             :   struct {
      43             :     uchar pubkey[ FD_HASH_FOOTPRINT ];
      44             :     uchar owner[ FD_HASH_FOOTPRINT ];
      45             :     ulong data_len;
      46             :     int   executable;
      47             :   } account_hdr;
      48             : 
      49             :   struct {
      50             :     struct {
      51             :       ulong accounts_hashed;
      52             :     } full;
      53             : 
      54             :     struct {
      55             :       ulong accounts_hashed;
      56             :     } incremental;
      57             :   } metrics;
      58             : 
      59             :   struct {
      60             :     fd_wksp_t * wksp;
      61             :     ulong       chunk0;
      62             :     ulong       wmark;
      63             :     ulong       mtu;
      64             :     ulong       pos;
      65             :   } in;
      66             : 
      67             :   struct {
      68             :     fd_wksp_t * wksp;
      69             :     ulong       chunk0;
      70             :     ulong       wmark;
      71             :     ulong       mtu;
      72             :   } adder_in[ FD_SNAPSHOT_MAX_SNAPLA_TILES ];
      73             : };
      74             : 
      75             : typedef struct fd_snapls_tile fd_snapls_tile_t;
      76             : 
      77             : static inline int
      78           0 : should_shutdown( fd_snapls_tile_t * ctx ) {
      79           0 :   return ctx->state==FD_SNAPSHOT_STATE_SHUTDOWN;
      80           0 : }
      81             : 
      82             : static ulong
      83           0 : scratch_align( void ) {
      84           0 :   return alignof(fd_snapls_tile_t);
      85           0 : }
      86             : 
      87             : static ulong
      88           0 : scratch_footprint( fd_topo_tile_t const * tile ) {
      89           0 :   (void)tile;
      90           0 :   ulong l = FD_LAYOUT_INIT;
      91           0 :   l = FD_LAYOUT_APPEND( l, alignof(fd_snapls_tile_t), sizeof(fd_snapls_tile_t) );
      92           0 :   return FD_LAYOUT_FINI( l, alignof(fd_snapls_tile_t) );
      93           0 : }
      94             : 
      95             : static void
      96           0 : metrics_write( fd_snapls_tile_t * ctx ) {
      97           0 :   FD_MGAUGE_SET( SNAPLS, FULL_ACCOUNTS_HASHED,        ctx->metrics.full.accounts_hashed );
      98           0 :   FD_MGAUGE_SET( SNAPLS, INCREMENTAL_ACCOUNTS_HASHED, ctx->metrics.incremental.accounts_hashed );
      99           0 :   FD_MGAUGE_SET( SNAPLS, STATE,                       (ulong)(ctx->state) );
     100           0 : }
     101             : 
     102             : static void
     103             : transition_malformed( fd_snapls_tile_t *  ctx,
     104           0 :                       fd_stem_context_t * stem ) {
     105           0 :   ctx->state = FD_SNAPSHOT_STATE_ERROR;
     106           0 :   fd_stem_publish( stem, 0UL, FD_SNAPSHOT_MSG_CTRL_ERROR, 0UL, 0UL, 0UL, 0UL, 0UL );
     107           0 : }
     108             : 
     109             : static void
     110             : handle_data_frag( fd_snapls_tile_t *  ctx,
     111             :                   ulong               sig,
     112             :                   ulong               chunk,
     113           0 :                   ulong               sz ) {
     114           0 :   FD_TEST( ctx->state==FD_SNAPSHOT_STATE_PROCESSING );
     115             : 
     116           0 :   switch( sig ) {
     117           0 :     case FD_SNAPSHOT_HASH_MSG_SUB: {
     118           0 :       fd_snapshot_full_account_t const * prev_acc = fd_chunk_to_laddr_const( ctx->in.wksp, chunk );
     119             : 
     120           0 :       fd_lthash_value_t prev_lthash[1];
     121           0 :       fd_hashes_account_lthash_simple( prev_acc->hdr.pubkey,
     122           0 :                                        prev_acc->hdr.owner,
     123           0 :                                        prev_acc->hdr.lamports,
     124           0 :                                        prev_acc->hdr.executable,
     125           0 :                                        prev_acc->data,
     126           0 :                                        prev_acc->hdr.data_len,
     127           0 :                                        prev_lthash );
     128           0 :       fd_lthash_add( &ctx->running_lthash, prev_lthash );
     129             : 
     130           0 :       if( FD_LIKELY( ctx->full ) ) ctx->metrics.full.accounts_hashed++;
     131           0 :       else                         ctx->metrics.incremental.accounts_hashed++;
     132           0 :       break;
     133           0 :     }
     134           0 :     case FD_SNAPSHOT_HASH_MSG_SUB_HDR: {
     135           0 :       fd_snapshot_account_hdr_t const * acc = fd_chunk_to_laddr_const( ctx->in.wksp, chunk );
     136             : 
     137           0 :       if( acc->lamports!=0UL ) {
     138           0 :         ctx->hash_account = 1;
     139           0 :         fd_blake3_init( ctx->b3 );
     140           0 :         fd_blake3_append( ctx->b3, &acc->lamports, sizeof(ulong) );
     141           0 :         ctx->account_hdr.data_len = acc->data_len;
     142           0 :         ctx->account_hdr.executable = acc->executable;
     143           0 :         memcpy( ctx->account_hdr.owner, acc->owner, FD_HASH_FOOTPRINT );
     144           0 :         memcpy( ctx->account_hdr.pubkey, acc->pubkey, FD_HASH_FOOTPRINT );
     145           0 :       }
     146           0 :       break;
     147           0 :     }
     148           0 :     case FD_SNAPSHOT_HASH_MSG_SUB_DATA: {
     149           0 :       if( FD_LIKELY( !ctx->hash_account ) ) break;
     150             : 
     151           0 :       uchar const * acc_data = fd_chunk_to_laddr_const( ctx->in.wksp, chunk );
     152           0 :       fd_blake3_append( ctx->b3, acc_data, sz );
     153           0 :       ctx->acc_data_sz += sz;
     154           0 :       break;
     155           0 :     }
     156           0 :     default:
     157           0 :       FD_LOG_ERR(( "unexpected sig %lu in handle_data_frag", sig ));
     158           0 :       return;
     159           0 :   }
     160             : 
     161           0 :   if( FD_LIKELY( ctx->hash_account && ctx->acc_data_sz==ctx->account_hdr.data_len ) ) {
     162           0 :     fd_lthash_value_t account_lthash[1];
     163           0 :     fd_lthash_zero( account_lthash );
     164             : 
     165           0 :     uchar executable_flag = ctx->account_hdr.executable & 0x1;
     166           0 :     fd_blake3_append( ctx->b3, &executable_flag, sizeof(uchar) );
     167           0 :     fd_blake3_append( ctx->b3, ctx->account_hdr.owner, FD_HASH_FOOTPRINT );
     168           0 :     fd_blake3_append( ctx->b3, ctx->account_hdr.pubkey,  FD_HASH_FOOTPRINT );
     169           0 :     fd_blake3_fini_2048( ctx->b3, account_lthash->bytes );
     170           0 :     fd_lthash_add( &ctx->running_lthash, account_lthash );
     171             : 
     172           0 :     ctx->acc_data_sz  = 0UL;
     173           0 :     ctx->hash_account = 0;
     174             : 
     175           0 :     if( FD_LIKELY( ctx->full ) ) ctx->metrics.full.accounts_hashed++;
     176           0 :     else                         ctx->metrics.incremental.accounts_hashed++;
     177           0 :   }
     178           0 : }
     179             : 
     180             : static int
     181             : recv_acks( fd_snapls_tile_t * ctx,
     182           0 :            ulong              in_idx ) {
     183           0 :   FD_TEST( ctx->acks[ in_idx ]==0 );
     184             : 
     185           0 :   ctx->acks[ in_idx ] = 1;
     186           0 :   ctx->num_acks++;
     187             : 
     188           0 :   if( FD_UNLIKELY( ctx->num_acks!=1UL+ctx->num_hash_tiles ) ) return 0;
     189             : 
     190           0 :   fd_memset( ctx->acks, 0, sizeof(ctx->acks) );
     191           0 :   ctx->num_acks = 0UL;
     192           0 :   return 1;
     193           0 : }
     194             : 
     195             : static void
     196             : handle_control_frag( fd_snapls_tile_t *  ctx,
     197             :                      fd_stem_context_t * stem,
     198             :                      ulong               sig,
     199           0 :                      ulong               in_idx ) {
     200           0 :   switch( sig ) {
     201           0 :     case FD_SNAPSHOT_MSG_CTRL_INIT_FULL:
     202           0 :     case FD_SNAPSHOT_MSG_CTRL_INIT_INCR: {
     203           0 :       int done = recv_acks( ctx, in_idx );
     204           0 :       if( !done ) return;
     205             : 
     206           0 :       FD_TEST( ctx->state==FD_SNAPSHOT_STATE_IDLE );
     207           0 :       ctx->full  = sig==FD_SNAPSHOT_MSG_CTRL_INIT_FULL;
     208           0 :       ctx->state = FD_SNAPSHOT_STATE_PROCESSING;
     209           0 :       fd_lthash_zero( &ctx->running_lthash );
     210           0 :       break;
     211           0 :     }
     212             : 
     213           0 :     case FD_SNAPSHOT_MSG_CTRL_FAIL: {
     214           0 :       FD_TEST( ctx->state==FD_SNAPSHOT_STATE_PROCESSING ||
     215           0 :                ctx->state==FD_SNAPSHOT_STATE_FINISHING ||
     216           0 :                ctx->state==FD_SNAPSHOT_STATE_ERROR );
     217           0 :       int done = recv_acks( ctx, in_idx );
     218           0 :       if( !done ) return;
     219             : 
     220           0 :       ctx->state = FD_SNAPSHOT_STATE_IDLE;
     221           0 :       fd_lthash_zero( &ctx->running_lthash );
     222           0 :       break;
     223           0 :     }
     224             : 
     225           0 :     case FD_SNAPSHOT_MSG_CTRL_NEXT:
     226           0 :     case FD_SNAPSHOT_MSG_CTRL_DONE: {
     227           0 :       int done = recv_acks( ctx, in_idx );
     228           0 :       if( !done ) return;
     229             : 
     230           0 :       FD_TEST( ctx->state==FD_SNAPSHOT_STATE_PROCESSING );
     231           0 :       if( FD_UNLIKELY( ctx->state!=FD_SNAPSHOT_STATE_PROCESSING ) ) {
     232           0 :         transition_malformed( ctx, stem );
     233           0 :         return;
     234           0 :       }
     235             : 
     236           0 :       ctx->hash_accum.ack_sig           = sig;
     237           0 :       ctx->hash_accum.awaiting_ack      = 1;
     238           0 :       ctx->state = FD_SNAPSHOT_STATE_IDLE;
     239           0 :       return; /* the ack is sent when all hashes are received */
     240           0 :     }
     241             : 
     242           0 :     case FD_SNAPSHOT_MSG_CTRL_SHUTDOWN: {
     243           0 :       int done = recv_acks( ctx, in_idx );
     244           0 :       if( !done ) return;
     245             : 
     246           0 :       FD_TEST( ctx->state==FD_SNAPSHOT_STATE_IDLE );
     247           0 :       ctx->state = FD_SNAPSHOT_STATE_SHUTDOWN;
     248           0 :       break;
     249           0 :     }
     250             : 
     251           0 :     case FD_SNAPSHOT_MSG_CTRL_ERROR:
     252           0 :       ctx->state = FD_SNAPSHOT_STATE_ERROR;
     253           0 :       break;
     254             : 
     255           0 :     default:
     256           0 :       FD_LOG_ERR(( "unexpected control sig %lu", sig ));
     257           0 :       return;
     258           0 :   }
     259             : 
     260             :   /* Forward the control message down the pipeline */
     261           0 :   fd_stem_publish( stem, 0UL, sig, 0UL, 0UL, 0UL, 0UL, 0UL );
     262           0 : }
     263             : 
     264             : static void
     265             : handle_hash_frag( fd_snapls_tile_t * ctx,
     266             :                   ulong              in_idx,
     267             :                   ulong              sig,
     268             :                   ulong              chunk,
     269           0 :                   ulong              sz ) {
     270           0 :   FD_TEST( ctx->state==FD_SNAPSHOT_STATE_PROCESSING || ctx->state==FD_SNAPSHOT_STATE_IDLE );
     271           0 :   switch( sig ) {
     272           0 :     case FD_SNAPSHOT_HASH_MSG_RESULT_ADD: {
     273           0 :       FD_TEST( sz==sizeof(fd_lthash_value_t) );
     274           0 :       fd_lthash_value_t const * result = fd_chunk_to_laddr_const( ctx->adder_in[ in_idx-ctx->adder_in_offset ].wksp, chunk );
     275           0 :       fd_lthash_add( &ctx->hash_accum.calculated_lthash, result );
     276           0 :       ctx->hash_accum.received_lthashes++;
     277           0 :       break;
     278           0 :     }
     279           0 :     case FD_SNAPSHOT_HASH_MSG_EXPECTED: {
     280           0 :       FD_TEST( sz==sizeof(fd_lthash_value_t) );
     281           0 :       FD_TEST( ctx->in_kind[ in_idx ]==IN_KIND_SNAPIN );
     282           0 :       fd_lthash_value_t const * result = fd_chunk_to_laddr_const( ctx->in.wksp, chunk );
     283           0 :       fd_memcpy( &ctx->hash_accum.expected_lthash, result, sizeof(fd_lthash_value_t) );
     284           0 :       break;
     285           0 :     }
     286           0 :     default:
     287           0 :       FD_LOG_ERR(( "unexpected hash sig %lu", sig ));
     288           0 :       break;
     289           0 :   }
     290             : 
     291           0 : }
     292             : 
     293             : static inline int
     294             : returnable_frag( fd_snapls_tile_t *  ctx,
     295             :                  ulong               in_idx FD_PARAM_UNUSED,
     296             :                  ulong               seq    FD_PARAM_UNUSED,
     297             :                  ulong               sig,
     298             :                  ulong               chunk,
     299             :                  ulong               sz,
     300             :                  ulong               ctl    FD_PARAM_UNUSED,
     301             :                  ulong               tsorig FD_PARAM_UNUSED,
     302             :                  ulong               tspub  FD_PARAM_UNUSED,
     303           0 :                  fd_stem_context_t * stem ) {
     304           0 :   FD_TEST( ctx->state!=FD_SNAPSHOT_STATE_SHUTDOWN );
     305             : 
     306           0 :   if( FD_LIKELY( sig==FD_SNAPSHOT_HASH_MSG_SUB ||
     307           0 :                  sig==FD_SNAPSHOT_HASH_MSG_SUB_HDR ||
     308           0 :                  sig==FD_SNAPSHOT_HASH_MSG_SUB_DATA ) )        handle_data_frag( ctx, sig, chunk, sz );
     309           0 :   else if( FD_LIKELY( sig==FD_SNAPSHOT_HASH_MSG_RESULT_ADD ||
     310           0 :                       sig==FD_SNAPSHOT_HASH_MSG_EXPECTED ) )   handle_hash_frag( ctx, in_idx, sig, chunk, sz );
     311           0 :   else                                                         handle_control_frag( ctx, stem, sig, in_idx );
     312             : 
     313           0 :   return 0;
     314           0 : }
     315             : 
     316             : static void
     317             : after_credit( fd_snapls_tile_t *  ctx,
     318             :               fd_stem_context_t *  stem,
     319             :               int *                opt_poll_in FD_PARAM_UNUSED,
     320           0 :               int *                charge_busy FD_PARAM_UNUSED ) {
     321           0 :   if( FD_UNLIKELY( ctx->hash_accum.received_lthashes==ctx->num_hash_tiles && ctx->hash_accum.awaiting_ack ) ) {
     322           0 :     fd_lthash_sub( &ctx->hash_accum.calculated_lthash, &ctx->running_lthash );
     323           0 :     if( FD_UNLIKELY( memcmp( &ctx->hash_accum.expected_lthash, &ctx->hash_accum.calculated_lthash, sizeof(fd_lthash_value_t) ) ) ) {
     324           0 :       FD_LOG_WARNING(( "calculated accounts lthash %s does not match accounts lthash %s in snapshot manifest",
     325           0 :                         FD_LTHASH_ENC_32_ALLOCA( &ctx->hash_accum.calculated_lthash ),
     326           0 :                         FD_LTHASH_ENC_32_ALLOCA( &ctx->hash_accum.expected_lthash ) ));
     327           0 :       transition_malformed( ctx, stem );
     328           0 :     } else {
     329           0 :       FD_LOG_NOTICE(( "calculated accounts lthash %s matches accounts lthash %s in snapshot manifest",
     330           0 :                       FD_LTHASH_ENC_32_ALLOCA( &ctx->hash_accum.calculated_lthash ),
     331           0 :                       FD_LTHASH_ENC_32_ALLOCA( &ctx->hash_accum.expected_lthash ) ));
     332           0 :     }
     333           0 :     ctx->hash_accum.received_lthashes = 0UL;
     334           0 :     ctx->hash_accum.hash_check_done = 1;
     335           0 :   }
     336             : 
     337           0 :   if( FD_UNLIKELY( ctx->hash_accum.awaiting_ack && ctx->hash_accum.hash_check_done ) ) {
     338           0 :     fd_stem_publish( stem, 0UL, ctx->hash_accum.ack_sig, 0UL, 0UL, 0UL, 0UL, 0UL );
     339           0 :     ctx->hash_accum.awaiting_ack    = 0;
     340           0 :     ctx->hash_accum.hash_check_done = 0;
     341           0 :   }
     342           0 : }
     343             : 
     344             : static ulong
     345             : populate_allowed_fds( fd_topo_t      const * topo FD_PARAM_UNUSED,
     346             :                       fd_topo_tile_t const * tile FD_PARAM_UNUSED,
     347             :                       ulong                  out_fds_cnt,
     348           0 :                       int *                  out_fds ) {
     349           0 :   if( FD_UNLIKELY( out_fds_cnt<2UL ) ) FD_LOG_ERR(( "out_fds_cnt %lu", out_fds_cnt ));
     350             : 
     351           0 :   ulong out_cnt = 0;
     352           0 :   out_fds[ out_cnt++ ] = 2UL; /* stderr */
     353           0 :   if( FD_LIKELY( -1!=fd_log_private_logfile_fd() ) ) {
     354           0 :     out_fds[ out_cnt++ ] = fd_log_private_logfile_fd(); /* logfile */
     355           0 :   }
     356             : 
     357           0 :   return out_cnt;
     358           0 : }
     359             : 
     360             : static ulong
     361             : populate_allowed_seccomp( fd_topo_t const *      topo FD_PARAM_UNUSED,
     362             :                           fd_topo_tile_t const * tile FD_PARAM_UNUSED,
     363             :                           ulong                  out_cnt,
     364           0 :                           struct sock_filter *   out ) {
     365           0 :   populate_sock_filter_policy_fd_snapls_tile( out_cnt, out, (uint)fd_log_private_logfile_fd() );
     366           0 :   return sock_filter_policy_fd_snapls_tile_instr_cnt;
     367           0 : }
     368             : 
     369             : static void
     370             : unprivileged_init( fd_topo_t *      topo,
     371           0 :                    fd_topo_tile_t * tile ) {
     372           0 :   void * scratch = fd_topo_obj_laddr( topo, tile->tile_obj_id );
     373             : 
     374           0 :   FD_SCRATCH_ALLOC_INIT( l, scratch );
     375           0 :   fd_snapls_tile_t * ctx = FD_SCRATCH_ALLOC_APPEND( l, alignof(fd_snapls_tile_t), sizeof(fd_snapls_tile_t)         );
     376             : 
     377           0 :   ulong expected_in_cnt = 1UL + fd_topo_tile_name_cnt( topo, "snapla" );
     378           0 :   if( FD_UNLIKELY( tile->in_cnt!=expected_in_cnt ) )  FD_LOG_ERR(( "tile `" NAME "` has %lu ins, expected %lu",  tile->in_cnt, expected_in_cnt ));
     379           0 :   if( FD_UNLIKELY( tile->out_cnt!=1UL ) ) FD_LOG_ERR(( "tile `" NAME "` has %lu outs, expected 1", tile->out_cnt ));
     380             : 
     381           0 :   ulong adder_idx = 0UL;
     382           0 :   for( ulong i=0UL; i<(tile->in_cnt); i++ ) {
     383           0 :     fd_topo_link_t * in_link = &topo->links[ tile->in_link_id[ i ] ];
     384           0 :     fd_topo_wksp_t const * in_wksp = &topo->workspaces[ topo->objs[ in_link->dcache_obj_id ].wksp_id ];
     385           0 :     if( FD_LIKELY( 0==strcmp( in_link->name, "snapin_ls" ) ) ) {
     386           0 :       ctx->in.wksp                   = in_wksp->wksp;;
     387           0 :       ctx->in.chunk0                 = fd_dcache_compact_chunk0( ctx->in.wksp, in_link->dcache );
     388           0 :       ctx->in.wmark                  = fd_dcache_compact_wmark( ctx->in.wksp, in_link->dcache, in_link->mtu );
     389           0 :       ctx->in.mtu                    = in_link->mtu;
     390           0 :       ctx->in.pos                    = 0UL;
     391           0 :       ctx->in_kind[ i ]              = IN_KIND_SNAPIN;
     392           0 :     } else if( FD_LIKELY( 0==strcmp( in_link->name, "snapla_ls" ) ) ) {
     393           0 :       ctx->adder_in[ adder_idx ].wksp    = in_wksp->wksp;
     394           0 :       ctx->adder_in[ adder_idx ].chunk0  = fd_dcache_compact_chunk0( ctx->adder_in[ adder_idx ].wksp, in_link->dcache );
     395           0 :       ctx->adder_in[ adder_idx ].wmark   = fd_dcache_compact_wmark ( ctx->adder_in[ adder_idx ].wksp, in_link->dcache, in_link->mtu );
     396           0 :       ctx->adder_in[ adder_idx ].mtu     = in_link->mtu;
     397           0 :       ctx->in_kind[ i ]                  = IN_KIND_SNAPLA;
     398           0 :       if( FD_LIKELY( adder_idx==0UL ) ) ctx->adder_in_offset = i;
     399           0 :       adder_idx++;
     400           0 :     } else {
     401           0 :       FD_LOG_ERR(( "tile `" NAME "` has unexpected in link name `%s`", in_link->name ));
     402           0 :     }
     403           0 :   }
     404             : 
     405           0 :   fd_topo_link_t * out_link = &topo->links[ tile->out_link_id[ 0UL ] ];
     406           0 :   FD_TEST( 0==strcmp( out_link->name, "snapls_ct" ) );
     407             : 
     408           0 :   ctx->metrics.full.accounts_hashed        = 0UL;
     409           0 :   ctx->metrics.incremental.accounts_hashed = 0UL;
     410             : 
     411           0 :   ctx->state                        = FD_SNAPSHOT_STATE_IDLE;
     412           0 :   ctx->full                         = 1;
     413           0 :   ctx->hash_account                 = 0;
     414             : 
     415           0 :   ctx->num_hash_tiles               = fd_topo_tile_name_cnt( topo, "snapla" );
     416             : 
     417           0 :   ctx->hash_accum.received_lthashes = 0UL;
     418           0 :   ctx->hash_accum.awaiting_ack      = 0;
     419           0 :   ctx->hash_accum.hash_check_done   = 0;
     420             : 
     421           0 :   ctx->num_acks                     = 0UL;
     422           0 :   fd_memset( ctx->acks, 0, sizeof(ctx->acks) );
     423             : 
     424           0 :   fd_lthash_zero( &ctx->hash_accum.calculated_lthash );
     425           0 :   fd_lthash_zero( &ctx->running_lthash );
     426           0 : }
     427             : 
     428           0 : #define STEM_BURST 2UL /* one control message and one malformed message */
     429           0 : #define STEM_LAZY  1000L
     430             : 
     431           0 : #define STEM_CALLBACK_CONTEXT_TYPE  fd_snapls_tile_t
     432           0 : #define STEM_CALLBACK_CONTEXT_ALIGN alignof(fd_snapls_tile_t)
     433             : 
     434             : #define STEM_CALLBACK_SHOULD_SHUTDOWN should_shutdown
     435           0 : #define STEM_CALLBACK_METRICS_WRITE   metrics_write
     436           0 : #define STEM_CALLBACK_AFTER_CREDIT    after_credit
     437           0 : #define STEM_CALLBACK_RETURNABLE_FRAG returnable_frag
     438             : 
     439             : #include "../../disco/stem/fd_stem.c"
     440             : 
     441             : fd_topo_run_tile_t fd_tile_snapls = {
     442             :   .name                     = NAME,
     443             :   .populate_allowed_fds     = populate_allowed_fds,
     444             :   .populate_allowed_seccomp = populate_allowed_seccomp,
     445             :   .scratch_align            = scratch_align,
     446             :   .scratch_footprint        = scratch_footprint,
     447             :   .unprivileged_init        = unprivileged_init,
     448             :   .run                      = stem_run,
     449             : };
     450             : 
     451             : #undef NAME
     452             :