1993/1017/port/cache.c (diff list | history)

1993/1016/sys/src/9/port/cache.c:41,47 – 1993/1017/sys/src/9/port/cache.c:41,48 (short | long | prev | next)
1993/1013		typedef struct Cache Cache; struct Cache
1993/1011		{
1993/1013		Ref;
1993/1017		Lock; int pgno;
1993/1013		Mntcache *head; Mntcache *tail; Mntcache *hash[NHASH];
1993/1016/sys/src/9/port/cache.c:54,60 – 1993/1017/sys/src/9/port/cache.c:55,60
1993/1014		int i; Mntcache *m; cache.ref = 1; cache.head = xalloc(sizeof(Mntcache)*NFILE); m = cache.head;
1993/1016/sys/src/9/port/cache.c:70,84 – 1993/1017/sys/src/9/port/cache.c:70,86
1993/1014		}
1993/1013		void
1993/1015		cprint(Mntcache *m, char *s)
1993/1017		cprint(Chan *c, Mntcache *m, char *s)
1993/1014		{ Extent *e;
1993/1017		char buf[128];
1993/1016
1993/1015		print("%s: 0x%lux.0x%lux %d %d\n", s, m->path, m->vers, m->type, m->dev);
1993/1017		ptpath(c->path, buf, sizeof(buf)); pprint("%s: 0x%lux.0x%lux %d %d %s\n", s, m->path, m->vers, m->type, m->dev, buf);
1993/1014
1993/1015		for(e = m->list; e; e = e->next)
1993/1014		print("\t%4d %5d %4d %lux\n",
1993/1017		pprint("\t%4d %5d %4d %lux\n",
1993/1014		e->bid, e->start, e->len, e->cache); }
1993/1016/sys/src/9/port/cache.c:138,144 – 1993/1017/sys/src/9/port/cache.c:140,146
1993/1013		{ Mntcache *m, *f, **l;
1993/1015		if(c->qid.path & CHDIR)
1993/1017		if((c->qid.path&CHDIR) || (c->flag&CTEXT))
1993/1015		return;
1993/1016		lock(&cache);
1993/1016/sys/src/9/port/cache.c:207,213 – 1993/1017/sys/src/9/port/cache.c:209,215
1993/1013		Page *p; Mntcache *m;
1993/1014		Extent *e, **t; int o, l, total, end;
1993/1017		int o, l, total;
1993/1013
1993/1015		if(c->qid.path & CHDIR) return 0;
1993/1016/sys/src/9/port/cache.c:222,236 – 1993/1017/sys/src/9/port/cache.c:224,233
1993/1013		return 0; } end = offset+len;
1993/1014		t = &m->list; for(e = *t; e; e = e->next) {
1993/1016		if(offset > e->start && offset < e->start+e->len)
1993/1013		break;
1993/1016		if(offset < e->start) { qunlock(m); return 0; }
1993/1014		t = &e->next;
1993/1013		}
1993/1016/sys/src/9/port/cache.c:277,282 – 1993/1017/sys/src/9/port/cache.c:274,280
1993/1013		if(e == 0 || e->start != offset) break; }
1993/1017		if(len) print("P"); else print("F");
1993/1014		qunlock(m);
1993/1013		return total; }
1993/1016/sys/src/9/port/cache.c:309,315 – 1993/1017/sys/src/9/port/cache.c:307,316
1993/1015		e->cache = p; e->start = offset; e->len = l;
1993/1014		e->bid = incref(&cache);
1993/1017		lock(&cache); e->bid = cache.pgno; cache.pgno += BY2PG; unlock(&cache);
1993/1014		p->daddr = e->bid; k = kmap(p); memmove((void*)VA(k), buf, l);
1993/1016/sys/src/9/port/cache.c:460,466 – 1993/1017/sys/src/9/port/cache.c:461,466
1993/1016		cupdate(Chan *c, uchar *buf, int len, ulong offset) { cxupdate(c, buf, len, offset); cprint(c->mcp, "cupdate"); } void
1993/1016/sys/src/9/port/cache.c:485,494 – 1993/1017/sys/src/9/port/cache.c:485,495
1993/1015		} m->vers++;
1993/1017		c->qid.vers++;
1993/1015		p = 0; for(f = m->list; f; f = f->next) { if(offset >= f->start)
1993/1017		if(f->start >= offset)
1993/1015		break; p = f; }
1993/1016/sys/src/9/port/cache.c:501,506 – 1993/1017/sys/src/9/port/cache.c:502,522
1993/1016		if(p->len == 0)
1993/1015		panic("del empty extent"); }
1993/1017		if(ee == offset && p->len < BY2PG) { o = len; if(o > BY2PG - p->len) o = BY2PG - p->len; if(cpgmove(p, buf, p->len, o)) { p->len += o; buf += o; len -= o; offset += o; if(len <= 0) { qunlock(m); return; } } }
1993/1015		} eblock = offset+len;
1993/1016/sys/src/9/port/cache.c:521,525 – 1993/1017/sys/src/9/port/cache.c:537,540
1993/1016		tail->next = f; }
1993/1015		qunlock(m); cprint(m, "cwrite");
1993/1011		}