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#include "stdinc.h"
#include "dat.h"
#include "fns.h"
void
usage(void)
{
fprint(2, "usage: fmtarenas [-Z] [-b blocksize] [-a arenasize] name file\n");
threadexitsall(0);
}
void
threadmain(int argc, char *argv[])
{
ArenaPart *ap;
Part *part;
Arena *arena;
u64int addr, limit, asize, apsize;
char *file, *name, aname[ANameSize];
int i, n, blocksize, tabsize, zero;
fmtinstall('V', vtscorefmt);
statsinit();
blocksize = 8 * 1024;
asize = 512 * 1024 *1024;
tabsize = 64 * 1024; /* BUG: should be determine from number of arenas */
zero = 1;
ARGBEGIN{
case 'a':
asize = unittoull(ARGF());
if(asize == TWID64)
usage();
break;
case 'b':
blocksize = unittoull(ARGF());
if(blocksize == ~0)
usage();
if(blocksize > MaxDiskBlock){
fprint(2, "block size too large, max %d\n", MaxDiskBlock);
threadexitsall("usage");
}
break;
case 'Z':
zero = 0;
break;
default:
usage();
break;
}ARGEND
if(argc != 2)
usage();
name = argv[0];
file = argv[1];
if(nameok(name) < 0)
sysfatal("illegal name template %s", name);
part = initpart(file, 1);
if(part == nil)
sysfatal("can't open partition %s: %r", file);
if(zero)
zeropart(part, blocksize);
ap = newarenapart(part, blocksize, tabsize);
if(ap == nil)
sysfatal("can't initialize arena: %r");
apsize = ap->size - ap->arenabase;
n = apsize / asize;
if(apsize - (n * asize) >= MinArenaSize)
n++;
fprint(2, "configuring %s with arenas=%d for a total storage of bytes=%lld and directory bytes=%d\n",
file, n, apsize, ap->tabsize);
ap->narenas = n;
ap->map = MKNZ(AMap, n);
ap->arenas = MKNZ(Arena*, n);
addr = ap->arenabase;
for(i = 0; i < n; i++){
limit = addr + asize;
if(limit >= ap->size || ap->size - limit < MinArenaSize){
limit = ap->size;
if(limit - addr < MinArenaSize)
sysfatal("bad arena set math: runt arena at %lld,%lld %lld\n", addr, limit, ap->size);
}
snprint(aname, ANameSize, "%s%d", name, i);
fprint(2, "adding arena %s at [%lld,%lld)\n", aname, addr, limit);
arena = newarena(part, aname, addr, limit - addr, blocksize);
if(!arena)
fprint(2, "can't make new arena %s: %r", aname);
freearena(arena);
ap->map[i].start = addr;
ap->map[i].stop = limit;
namecp(ap->map[i].name, aname);
addr = limit;
}
if(wbarenapart(ap) < 0)
fprint(2, "can't write back arena partition header for %s: %r\n", file);
threadexitsall(0);
}
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