8 fprint(2, "usage: fmtarenas [-Z] [-b blocksize] [-a arenasize] name file\n");
13 threadmain(int argc, char *argv[])
18 u64int addr, limit, asize, apsize;
19 char *file, *name, aname[ANameSize];
20 int i, n, blocksize, tabsize, zero;
22 fmtinstall('V', vtscorefmt);
27 asize = 512 * 1024 *1024;
28 tabsize = 64 * 1024; /* BUG: should be determine from number of arenas */
32 asize = unittoull(ARGF());
37 blocksize = unittoull(ARGF());
40 if(blocksize > MaxDiskBlock){
41 fprint(2, "block size too large, max %d\n", MaxDiskBlock);
42 threadexitsall("usage");
60 sysfatal("illegal name template %s", name);
62 part = initpart(file, 1);
64 sysfatal("can't open partition %s: %r", file);
67 zeropart(part, blocksize);
69 ap = newarenapart(part, blocksize, tabsize);
71 sysfatal("can't initialize arena: %r");
73 apsize = ap->size - ap->arenabase;
75 if(apsize - (n * asize) >= MinArenaSize)
78 fprint(2, "configuring %s with arenas=%d for a total storage of bytes=%lld and directory bytes=%d\n",
79 file, n, apsize, ap->tabsize);
82 ap->map = MKNZ(AMap, n);
83 ap->arenas = MKNZ(Arena*, n);
86 for(i = 0; i < n; i++){
88 if(limit >= ap->size || ap->size - limit < MinArenaSize){
90 if(limit - addr < MinArenaSize)
91 sysfatal("bad arena set math: runt arena at %lld,%lld %lld\n", addr, limit, ap->size);
94 snprint(aname, ANameSize, "%s%d", name, i);
96 fprint(2, "adding arena %s at [%lld,%lld)\n", aname, addr, limit);
98 arena = newarena(part, aname, addr, limit - addr, blocksize);
100 fprint(2, "can't make new arena %s: %r", aname);
103 ap->map[i].start = addr;
104 ap->map[i].stop = limit;
105 namecp(ap->map[i].name, aname);
110 if(wbarenapart(ap) < 0)
111 fprint(2, "can't write back arena partition header for %s: %r\n", file);