devaoe: fix off by one in aoeerror(), consistent use of nil for pointers, error handling
This commit is contained in:
cinap_lenrek
parent
769b3f1c2f
commit
0b3fd7c052
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@ -309,7 +309,7 @@ srbcleanout(Aoedev *d, Srb *srb)
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if(srb == d->inprocess)
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d->inprocess = nil;
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else
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for(ll = &d->head; x = *ll; ll = &x->next){
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for(ll = &d->head; (x = *ll) != nil; ll = &x->next){
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d->tail = x;
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if(x == srb)
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*ll = x->next;
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@ -334,7 +334,7 @@ frameerror(Aoedev *d, Frame *f, char *s)
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srb = f->srb;
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f->srb = nil;
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f->tag = Tfree; /* don't get fooled by way-slow responses */
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if(!srb)
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if(srb == nil)
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return;
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srb->nout--;
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srberror(d, srb, s);
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@ -375,15 +375,15 @@ eventlogread(void *a, long n)
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/* the concern here is page faults in memmove below */
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if(waserror()){
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free(buf);
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qunlock(&events);
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free(buf);
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nexterror();
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}
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memmove(a, buf, n);
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poperror();
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}
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free(buf);
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qunlock(&events);
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free(buf);
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return n;
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}
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@ -502,16 +502,16 @@ pickdevlink(Aoedev *d)
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for(i = 0; i < d->ndl; i++){
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n = d->dlidx++ % d->ndl;
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l = d->dl + n;
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if(l && l->flag & Dup)
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if(l->flag & Dup)
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return l;
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}
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return 0;
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return nil;
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}
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static int
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pickea(Devlink *l)
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{
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if(l == 0)
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if(l == nil)
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return -1;
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if(l->nea == 0)
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return -1;
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@ -530,7 +530,7 @@ hset(Aoedev *d, Frame *f, Aoehdr *h, int cmd, int new)
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int i;
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Devlink *l;
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if(f->srb)
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if(f->srb != nil)
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if((long)(Ticks-f->srb->ticksent) > Srbtimeout){
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eventlog("%æ: srb timeout\n", d);
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if(cmd == ACata && Nofail(d, s))
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@ -653,7 +653,7 @@ loop:
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}
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starttick = Ticks;
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rlock(&devs);
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for(d = devs.d; d; d = d->next){
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for(d = devs.d; d != nil; d = d->next){
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if(!canqlock(d))
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continue;
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if(!UP(d)){
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@ -790,7 +790,7 @@ unitseq(Chan *c, uint unit, Dir *dp)
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i = 0;
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rv = -1;
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rlock(&devs);
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for(d = devs.d; d; d = d->next)
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for(d = devs.d; d != nil; d = d->next)
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if(i++ == unit){
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mkqid(&q, QID(d->unit, Qunitdir), 0, QTDIR);
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devdir(c, q, unitname(d), 0, eve, 0555, dp);
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@ -807,7 +807,7 @@ unit2dev(ulong unit)
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Aoedev *d;
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rlock(&devs);
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for(d = devs.d; d; d = d->next)
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for(d = devs.d; d != nil; d = d->next)
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if(d->unit == unit){
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runlock(&devs);
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return d;
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@ -1102,9 +1102,9 @@ aoeerror(Aoehdr *h)
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};
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if((h->verflag & AFerr) == 0)
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return 0;
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return nil;
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n = h->error;
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if(n > nelem(errs))
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if(n >= nelem(errs))
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n = 0;
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return errs[n];
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}
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@ -1182,7 +1182,7 @@ strategy(Aoedev *d, Srb *srb)
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if(!UP(d))
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error(Eio);
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srb->next = nil;
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if(d->tail)
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if(d->tail != nil)
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d->tail->next = srb;
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d->tail = srb;
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if(d->head == nil)
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@ -1409,7 +1409,7 @@ topctlread(Chan *, void *db, int len, int off)
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for(i = 0; i < Nnetlink; i++){
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n = netlinks.nl+i;
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if(n->cc == 0)
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if(n->cc == nil)
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continue;
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p = seprint(p, e, "if%d path: %s\n", i, n->path);
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p = seprint(p, e, "if%d ea: %E\n", i, n->ea);
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@ -1707,7 +1707,7 @@ addnet(char *path, Chan *cc, Chan *dc, Chan *mtu, uchar *ea)
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}
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nl = netlinks.nl;
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e = nl + nelem(netlinks.nl);
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for(; nl < e && nl->cc; nl++)
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for(; nl < e && nl->cc != nil; nl++)
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continue;
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if(nl == e)
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error("out of netlink structures");
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@ -2249,11 +2249,9 @@ getaddr(char *path, uchar *ea)
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cclose(c);
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nexterror();
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}
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if(c == nil)
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panic("æ: getaddr: c == nil");
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n = devtab[c->type]->read(c, buf, sizeof buf-1, 0);
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poperror();
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cclose(c);
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poperror();
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buf[n] = 0;
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if(parseether(ea, buf) < 0)
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error("parseether failure");
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@ -2270,21 +2268,19 @@ netbind(char *path)
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snprint(addr, sizeof addr, "%s!0x%x", path, Aoetype);
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dc = chandial(addr, nil, nil, &cc);
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snprint(addr, sizeof addr, "%s/mtu", path);
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if(waserror())
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mtu = nil;
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else {
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mtu = nil;
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if(!waserror()){
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mtu = namec(addr, Aopen, OREAD, 0);
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poperror();
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}
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if(waserror()){
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cclose(dc);
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cclose(cc);
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if(mtu)
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if(mtu != nil)
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cclose(mtu);
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nexterror();
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}
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if(dc == nil || cc == nil)
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if(dc == nil || cc == nil)
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error(Enonexist);
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getaddr(path, ea);
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nl = addnet(path, cc, dc, mtu, ea);
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@ -2346,7 +2342,7 @@ netunbind(char *path)
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/* reschedule packets. */
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wlock(&devs);
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for(d = devs.d; d; d = d->next){
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for(d = devs.d; d != nil; d = d->next){
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qlock(d);
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for(i = 0; i < d->nframes; i++){
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f = d->frames + i;
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@ -2359,7 +2355,7 @@ netunbind(char *path)
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/* squeeze devlink pool. (we assert nobody is using them now) */
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wlock(&devs);
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for(d = devs.d; d; d = d->next){
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for(d = devs.d; d != nil; d = d->next){
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qlock(d);
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for(i = 0; i < d->ndl; i++){
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l = d->dl + i;
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@ -2374,7 +2370,7 @@ netunbind(char *path)
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lock(&netlinks);
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dc = n->dc;
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cc = n->cc;
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if(n->mtu)
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if(n->mtu != nil)
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cclose(n->mtu);
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memset(n, 0, sizeof *n);
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unlock(&netlinks);
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@ -2384,7 +2380,7 @@ netunbind(char *path)
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/* squeeze orphan devices */
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wlock(&devs);
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for(p = d = devs.d; d; d = next){
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for(p = d = devs.d; d != nil; d = next){
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next = d->next;
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if(d->ndl > 0){
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p = d;
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@ -2413,7 +2409,7 @@ strtoss(char *f, uint *shelf, uint *slot)
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*shelf = 0xffff;
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*slot = 0xff;
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if(!f)
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if(f == nil)
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return;
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*shelf = strtol(f, &s, 0);
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if(s == f || *shelf > 0xffff)
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@ -2444,7 +2440,7 @@ removedev(Aoedev *d)
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wlock(&devs);
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p = 0;
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if(d != devs.d)
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for(p = devs.d; p; p = p->next)
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for(p = devs.d; p != nil; p = p->next)
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if(p->next == d)
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break;
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qlock(d);
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@ -2455,7 +2451,7 @@ removedev(Aoedev *d)
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for(i = 0; i < d->nframes; i++)
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frameerror(d, d->frames+i, Enotup);
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if(p)
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if(p != nil)
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p->next = d->next;
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else
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devs.d = d->next;
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@ -2494,7 +2490,7 @@ removestr(char *f)
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strtoss(f, &shelf, &slot);
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wlock(&devs);
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for(d = devs.d; d; d = d->next)
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for(d = devs.d; d != nil; d = d->next)
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if(shelf == d->major && slot == d->minor){
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wunlock(&devs); /* BOTCH */
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removedev(d);
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