5 typedef struct AHash AHash;
8 * hash table for finding arena's based on their names.
21 static AHash *ahash[AHashSize];
32 h += (c << 11) ^ (c >> 1);
34 h ^= (c << 14) + (c << 7) + (c << 4) + c;
40 addarena(Arena *arena)
45 h = hashstr(arena->name) & (AHashSize - 1);
61 h = hashstr(name) & (AHashSize - 1);
62 for(a = ahash[h]; a != nil; a = a->next)
63 if(strcmp(a->arena->name, name) == 0)
69 delarena(Arena *arena)
74 h = hashstr(arena->name) & (AHashSize - 1);
76 for(a = ahash[h]; a != nil; a = a->next){
77 if(a->arena == arena){
91 initarenapart(Part *part)
99 b = alloczblock(HeadSize, 0);
100 if(b == nil || readpart(part, PartBlank, b->data, HeadSize) < 0){
101 seterr(EAdmin, "can't read arena partition header: %r");
111 ok = unpackarenapart(ap, b->data);
114 seterr(ECorrupt, "corrupted arena partition header: %r");
115 freearenapart(ap, 0);
119 ap->tabbase = (PartBlank + HeadSize + ap->blocksize - 1) & ~(ap->blocksize - 1);
120 if(ap->version != ArenaPartVersion){
121 seterr(ECorrupt, "unknown arena partition version %d", ap->version);
122 freearenapart(ap, 0);
125 if(ap->blocksize & (ap->blocksize - 1)){
126 seterr(ECorrupt, "illegal non-power-of-2 block size %d\n", ap->blocksize);
127 freearenapart(ap, 0);
130 if(ap->tabbase >= ap->arenabase){
131 seterr(ECorrupt, "arena partition table overlaps with arena storage");
132 freearenapart(ap, 0);
135 ap->tabsize = ap->arenabase - ap->tabbase;
136 partblocksize(part, ap->blocksize);
137 ap->size = ap->part->size & ~(u64int)(ap->blocksize - 1);
139 if(readarenamap(&amn, part, ap->tabbase, ap->tabsize) < 0){
140 freearenapart(ap, 0);
145 if(okamap(ap->map, ap->narenas, ap->arenabase, ap->size, "arena table") < 0){
146 freearenapart(ap, 0);
150 ap->arenas = MKNZ(Arena*, ap->narenas);
151 for(i = 0; i < ap->narenas; i++){
152 ap->arenas[i] = initarena(part, ap->map[i].start, ap->map[i].stop - ap->map[i].start, ap->blocksize);
153 if(ap->arenas[i] == nil){
154 freearenapart(ap, 1);
157 if(namecmp(ap->map[i].name, ap->arenas[i]->name) != 0){
158 seterr(ECorrupt, "arena name mismatches with expected name: %s vs. %s",
159 ap->map[i].name, ap->arenas[i]->name);
160 freearenapart(ap, 1);
163 if(findarena(ap->arenas[i]->name)){
164 seterr(ECorrupt, "duplicate arena name %s in %s",
165 ap->map[i].name, ap->part->name);
166 freearenapart(ap, 1);
171 for(i = 0; i < ap->narenas; i++)
172 addarena(ap->arenas[i]);
178 newarenapart(Part *part, u32int blocksize, u32int tabsize)
182 if(blocksize & (blocksize - 1)){
183 seterr(ECorrupt, "illegal non-power-of-2 block size %d\n", blocksize);
190 ap->version = ArenaPartVersion;
192 ap->blocksize = blocksize;
193 partblocksize(part, blocksize);
194 ap->size = part->size & ~(u64int)(blocksize - 1);
195 ap->tabbase = (PartBlank + HeadSize + blocksize - 1) & ~(blocksize - 1);
196 ap->arenabase = (ap->tabbase + tabsize + blocksize - 1) & ~(blocksize - 1);
197 ap->tabsize = ap->arenabase - ap->tabbase;
200 if(wbarenapart(ap) < 0){
201 freearenapart(ap, 0);
209 wbarenapart(ArenaPart *ap)
213 if(okamap(ap->map, ap->narenas, ap->arenabase, ap->size, "arena table") < 0)
215 b = alloczblock(HeadSize, 1);
217 //ZZZ set error message?
220 if(packarenapart(ap, b->data) < 0){
221 seterr(ECorrupt, "can't make arena partition header: %r");
225 if(writepart(ap->part, PartBlank, b->data, HeadSize) < 0){
226 seterr(EAdmin, "can't write arena partition header: %r");
232 return wbarenamap(ap->map, ap->narenas, ap->part, ap->tabbase, ap->tabsize);
236 freearenapart(ArenaPart *ap, int freearenas)
243 for(i = 0; i < ap->narenas; i++){
244 if(ap->arenas[i] == nil)
246 delarena(ap->arenas[i]);
247 freearena(ap->arenas[i]);
256 okamap(AMap *am, int n, u64int start, u64int stop, char *what)
262 for(i = 0; i < n; i++){
263 if(am[i].start < last){
265 seterr(ECorrupt, "invalid start address in %s", what);
267 seterr(ECorrupt, "overlapping ranges in %s", what);
270 if(am[i].stop < am[i].start){
271 seterr(ECorrupt, "invalid range in %s", what);
277 seterr(ECorrupt, "invalid ending address in %s", what);
284 maparenas(AMap *am, Arena **arenas, int n, char *what)
288 for(i = 0; i < n; i++){
289 arenas[i] = findarena(am[i].name);
290 if(arenas[i] == nil){
291 seterr(EAdmin, "can't find arena '%s' for '%s'\n", am[i].name, what);
299 readarenamap(AMapN *amn, Part *part, u64int base, u32int size)
304 if(partifile(&f, part, base, size) < 0)
306 ok = parseamap(&f, amn);
312 wbarenamap(AMap *am, int n, Part *part, u64int base, u64int size)
317 b = alloczblock(size, 1);
323 if(outputamap(&f, am, n) < 0){
324 seterr(ECorrupt, "arena set size too small");
328 if(writepart(part, base, b->data, size) < 0){
329 seterr(EAdmin, "can't write arena set: %r");
338 * amap: n '\n' amapelem * n
340 * amapelem: name '\t' astart '\t' asize '\n'
341 * astart, asize: u64int
344 parseamap(IFile *f, AMapN *amn)
355 if(ifileu32int(f, &v) < 0){
356 seterr(ECorrupt, "syntax error: bad number of elements in %s", f->name);
361 seterr(ECorrupt, "illegal number of elements in %s", f->name);
367 for(i = 0; i < n; i++){
369 if(s == nil || getfields(s, flds, 4, 0, "\t") != 3)
371 if(nameok(flds[0]) < 0)
373 namecp(am[i].name, flds[0]);
374 if(stru64int(flds[1], &v64) < 0){
375 seterr(ECorrupt, "syntax error: bad arena base address in %s", f->name);
380 if(stru64int(flds[2], &v64) < 0){
381 seterr(ECorrupt, "syntax error: bad arena size in %s", f->name);
394 outputamap(Fmt *f, AMap *am, int n)
398 if(fmtprint(f, "%ud\n", n) < 0)
400 for(i = 0; i < n; i++)
401 if(fmtprint(f, "%s\t%llud\t%llud\n", am[i].name, am[i].start, am[i].stop) < 0)