ref: af48e0e4130a9c7a0340fa61814d4f6d98359959
dir: /check.c/
#include <u.h>
#include <libc.h>
#include <fcall.h>
#include <avl.h>
#include "dat.h"
#include "fns.h"
char spc[128];
static int
isfree(vlong bp)
{
Arange *r, q;
Arena *a;
q.off = bp;
q.len = Blksz;
a = getarena(bp);
r = (Arange*)avllookup(a->free, &q, -1);
if(r == nil)
return 0;
return bp < (r->off + r->len);
}
static int
badblk(Blk *b, int h, Kvp *lo, Kvp *hi)
{
Kvp x, y;
int i, r;
Blk *c;
int fail;
fail = 0;
if(h < 0){
fprint(2, "node too deep (loop?\n");
fail++;
return fail;
}
if(b->type == Tleaf){
if(h != 0){
fprint(2, "unbalanced leaf\n");
fail++;
}
if(h != 0 && b->nval < 2){
fprint(2, "underfilled leaf\n");
fail++;
}
}
if(b->type == Tpivot && b->nval < 2){
fprint(2, "underfilled pivot\n");
fail++;
}
getval(b, 0, &x);
if(lo && keycmp(lo, &x) != 0)
fprint(2, "out of range keys %P != %P\n", lo, &x);
for(i = 1; i < b->nval; i++){
getval(b, i, &y);
if(hi && keycmp(&y, hi) >= 0){
fprint(2, "out of range keys %P >= %P\n", &y, hi);
fail++;
}
if(b->type == Tpivot){
if(isfree(x.bp.addr)){
fprint(2, "freed block in use: %llx\n", x.bp.addr);
fail++;
}
if((c = getblk(x.bp, 0)) == nil){
fprint(2, "corrupt block: %r\n");
fail++;
continue;
}
if(blkfill(c) != x.fill){
fprint(2, "mismatched block fill\n");
fail++;
}
if(badblk(c, h - 1, &x, &y))
fail++;
putblk(c);
}
r = keycmp(&x, &y);
switch(r){
case -1:
break;
case 0:
fprint(2, "duplicate keys %P, %P\n", &x, &y);
fail++;
break;
case 1:
fprint(2, "misordered keys %P, %P\n", &x, &y);
fail++;
break;
}
x = y;
}
return fail;
}
static int
badfree(void)
{
Arange *r, *n;
int i, fail;
fail = 0;
for(i = 0; i < fs->narena; i++){
r = (Arange*)avlmin(fs->arenas[i].free);
for(n = (Arange*)avlnext(r); n != nil; n = (Arange*)avlnext(n)){
if(r->off >= n->off){
fprint(2, "misordered length %llx >= %llx\n", r->off, n->off);
fail++;
}
if(r->off+r->len >= n->off){
fprint(2, "overlaping range %llx+%llx >= %llx\n", r->off, r->len, n->off);
abort();
fail++;
}
r = n;
}
}
return fail;
}
/* TODO: this will grow into fsck. */
int
checkfs(void)
{
int ok, height;
Blk *b;
ok = 1;
if(badfree())
ok = 0;
if((b = getroot(&fs->root, &height)) != nil){
if(badblk(b, height-1, nil, 0))
ok = 0;
putblk(b);
}
return ok;
}
void
rshowblk(int fd, Blk *b, int indent, int recurse)
{
Blk *c;
int i;
Kvp kv;
Msg m;
if(indent > sizeof(spc)/4)
indent = sizeof(spc)/4;
if(b == nil){
fprint(fd, "NIL\n");
return;
}
if(b->type == Tpivot){
for(i = 0; i < b->nbuf; i++){
getmsg(b, i, &m);
fprint(fd, "%.*s[%03d]|%M\n", 4*indent, spc, i, &m);
}
}
for(i = 0; i < b->nval; i++){
getval(b, i, &kv);
fprint(fd, "%.*s[%03d]|%P\n", 4*indent, spc, i, &kv);
if(b->type == Tpivot){
if((c = getblk(kv.bp, 0)) == nil)
sysfatal("failed load: %r");
if(recurse)
rshowblk(fd, c, indent + 1, 1);
putblk(c);
}
}
}
void
initshow(void)
{
int i;
memset(spc, ' ', sizeof(spc));
for(i = 0; i < sizeof(spc); i += 4)
spc[i] = '|';
}
void
showblk(Blk *b, char *m, int recurse)
{
fprint(2, "=== %s\n", m);
rshowblk(2, b, 0, recurse);
}
void
showfs(int fd, char *m)
{
Blk *b;
int h;
fprint(fd, "=== %s\n", m);
fprint(fd, "\tht: %d\n", fs->root.ht);
fprint(fd, "\trt: %B\n", fs->root.bp);
b = getroot(&fs->root, &h);
rshowblk(fd, b, 0, 1);
putblk(b);
}
void
showcache(int fd)
{
Bucket *bkt;
Blk *b;
int i;
for(i = 0; i < fs->cmax; i++){
bkt = &fs->cache[i];
lock(bkt);
if(bkt->b != nil)
fprint(fd, "bkt%d\n", i);
for(b = bkt->b; b != nil; b = b->hnext)
if(b->ref != 1)
fprint(fd, "\t%p[ref=%ld, t=%d] => %B\n", b, b->ref, b->type, b->bp);
unlock(bkt);
}
}
void
showpath(Path *p, int np)
{
int i;
char *op[] = {
[POmod] = "POmod",
[POrot] = "POrot",
[POsplit] = "POsplit",
[POmerge] = "POmerge",
};
print("path:\n");
#define A(b) (b ? b->bp.addr : -1)
for(i = 0; i < np; i++){
print("\t[%d] ==>\n"
"\t\t%s: b(%p)=%llx\n"
"\t\tnl(%p)=%llx, nr(%p)=%llx\n"
"\t\tidx=%d, midx=%d\n",
i, op[p[i].op],
p[i].b, A(p[i].b),
p[i].nl, A(p[i].nl),
p[i].nr, A(p[i].nr),
p[i].idx, p[i].midx);
print("\t\tclear=(%d, %d):%d\n", p[i].lo, p[i].hi, p[i].sz);
}
}
void
showfree(char *m)
{
Arange *r;
int i;
if(!debug)
return;
print("=== %s\n", m);
for(i = 0; i < fs->narena; i++){
print("arena %d:\n", i);
for(r = (Arange*)avlmin(fs->arenas[i].free); r != nil; r = (Arange*)avlnext(r))
print("\t%llx+%llx\n", r->off, r->len);
}
}