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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");
- exits(0);
- }
- int
- main(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);
- fmtinstall('R', vtErrFmt);
- vtAttach();
- 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);
- exits("usage");
- }
- break;
- case 'Z':
- zero = 0;
- break;
- default:
- usage();
- break;
- }ARGEND
- if(argc != 2)
- usage();
- name = argv[0];
- file = argv[1];
- if(!nameOk(name))
- fatal("illegal name template %s", name);
- part = initPart(file, 1);
- if(part == nil)
- fatal("can't open partition %s: %r", file);
- if(zero)
- zeroPart(part, blockSize);
- ap = newArenaPart(part, blockSize, tabSize);
- if(ap == nil)
- fatal("can't initialize arena: %R");
- apsize = ap->size - ap->arenaBase;
- n = apsize / asize;
- 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;
- 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))
- fprint(2, "can't write back arena partition header for %s: %R\n", file);
- exits(0);
- return 0; /* shut up stupid compiler */
- }
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