sys/src/cmd/venti/srv/printindex.c

   1 #include "stdinc.h"
   2 #include "dat.h"
   3 #include "fns.h"
   4 #include <bio.h>
   5
   6 Biobuf bout;
   7
   8 static void
   9 pie(IEntry *ie)
  10 {
  11         Bprint(&bout, "%22lld %V %3d %5d\n",
  12                 ie->ia.addr, ie->score, ie->ia.type, ie->ia.size);
  13 }
  14
  15 void
  16 usage(void)
  17 {
  18         fprint(2, "usage: printindex [-B blockcachesize] config [isectname...]\n");
  19         threadexitsall(0);
  20 }
  21
  22 Config conf;
  23
  24 int
  25 shoulddump(char *name, int argc, char **argv)
  26 {
  27         int i;
  28
  29         if(argc == 0)
  30                 return 1;
  31         for(i=0; i<argc; i++)
  32                 if(strcmp(name, argv[i]) == 0)
  33                         return 1;
  34         return 0;
  35 }
  36
  37 void
  38 dumpisect(ISect *is)
  39 {
  40         int j;
  41         uchar *buf;
  42         u32int i;
  43         u64int off;
  44         IBucket ib;
  45         IEntry ie;
  46
  47         buf = vtmalloc(is->blocksize);
  48         for(i=0; i<is->blocks; i++){
  49                 off = is->blockbase+(u64int)is->blocksize*i;
  50                 if(readpart(is->part, off, buf, is->blocksize) < 0)
  51                         fprint(2, "read %s at 0x%llux: %r\n", is->part->name, off);
  52                 else{
  53                         unpackibucket(&ib, buf, is->bucketmagic);
  54                         for(j=0; j<ib.n; j++){
  55                                 unpackientry(&ie, &ib.data[j*IEntrySize]);
  56                                 pie(&ie);
  57                         }
  58                 }
  59         }
  60 }
  61
  62 void
  63 threadmain(int argc, char *argv[])
  64 {
  65         int i;
  66         Index *ix;
  67         u32int bcmem;
  68
  69         bcmem = 0;
  70         ARGBEGIN{
  71         case 'B':
  72                 bcmem = unittoull(ARGF());
  73                 break;
  74         default:
  75                 usage();
  76                 break;
  77         }ARGEND
  78
  79         if(argc < 1)
  80                 usage();
  81
  82         fmtinstall('H', encodefmt);
  83
  84         if(initventi(argv[0], &conf) < 0)
  85                 sysfatal("can't init venti: %r");
  86
  87         if(bcmem < maxblocksize * (mainindex->narenas + mainindex->nsects * 4 + 16))
  88                 bcmem = maxblocksize * (mainindex->narenas + mainindex->nsects * 4 + 16);
  89         if(0) fprint(2, "initialize %d bytes of disk block cache\n", bcmem);
  90         initdcache(bcmem);
  91
  92         ix = mainindex;
  93         Binit(&bout, 1, OWRITE);
  94         for(i=0; i<ix->nsects; i++)
  95                 if(shoulddump(ix->sects[i]->name, argc-1, argv+1))
  96                         dumpisect(ix->sects[i]);
  97         Bterm(&bout);
  98         threadexitsall(0);
  99 }