3 * aoe storage initiator
7 #include "../port/lib.h"
13 #include "../port/error.h"
14 #include "../port/netif.h"
17 #include "../port/aoe.h"
20 #pragma varargck argpos eventlog 1
22 #define dprint(...) if(debug) eventlog(__VA_ARGS__); else USED(debug);
23 #define uprint(...) snprint(up->genbuf, sizeof up->genbuf, __VA_ARGS__);
29 Maxtype = (1<<Typebits)-1,
30 Maxunits = (1<<Unitbits)-1,
31 Maxl3 = (1<<L3bits)-1,
39 #define TYPE(q) ((ulong)(q).path & Maxtype)
40 #define UNIT(q) (((ulong)(q).path>>Typebits) & Maxunits)
41 #define L(q) (((ulong)(q).path>>Typebits+Unitbits) & Maxl3)
42 #define QID(u, t) ((u)<<Typebits | (t))
43 #define Q3(l, u, t) ((l)<<Typebits+Unitbits | QID(u, t))
44 #define UP(d) ((d)->flag & Dup)
46 #define Ticks MACHP(0)->ticks
47 #define Ms2tk(t) (((t)*HZ)/1000)
48 #define Tk2ms(t) (((t)*1000)/HZ)
67 Qdevlink = Qdevlinkbase,
70 Qtopfiles = Qtopend-Qtopbase,
71 Qdevlinkfiles = Qdevlinkend-Qdevlinkbase,
81 /* round trip bounds, timeouts, in ticks */
104 * unified set of flags
105 * a Netlink + Aoedev most both be jumbo capable
106 * to send jumbograms to that interface.
114 static char *flagname[] = {
126 Chan *mtu; /* open early to prevent bind issues. */
135 uchar eatab[Nea][Eaddrlen];
145 typedef struct Srb Srb;
167 uchar hdr[ETHERMINTU];
175 typedef struct Aoedev Aoedev;
185 Devlink dltab[Ndevlink];
218 #pragma varargck type "æ" Aoedev*
224 char buf[Eventlen*Nevents];
237 int reader[Nnetlink]; /* reader is running. */
238 Rendez rendez[Nnetlink]; /* confirm exit. */
239 Netlink nl[Nnetlink];
242 extern Dev aoedevtab;
244 static Ref drivevers;
246 static int autodiscover = 1;
247 static int rediscover;
248 extern char Enotup[] = "aoe device is down";
255 srb = smalloc(sizeof *srb+sz);
257 srb->dp = srb->data = srb+1;
258 srb->ticksent = Ticks;
263 srbkalloc(void *db, ulong)
267 srb = smalloc(sizeof *srb);
269 srb->dp = srb->data = db;
270 srb->ticksent = Ticks;
280 return s->nout == 0 && (s->len == 0 || s->error != nil);
288 for(n = 0; srb->state != Free; n++)
293 /* under Aoedev qlock() so setting of srb->state is safe */
298 assert(srb->state == Alloc);
305 srbcleanout(Aoedev *d, Srb *srb)
309 if(srb == d->inprocess)
312 for(ll = &d->head; x = *ll; ll = &x->next){
320 srberror(Aoedev *d, Srb *srb, char *s)
328 frameerror(Aoedev *d, Frame *f, char *s)
336 f->tag = Tfree; /* don't get fooled by way-slow responses */
347 uprint("%ud.%ud", d->major, d->minor);
352 eventlogread(void *a, long n)
357 buf = smalloc(Eventlen);
368 /* can't move directly into pageable space with events lock held */
369 memmove(buf, p+1, n);
371 events.rp = p += Eventlen;
372 if(p >= events.buf + sizeof events.buf)
373 events.rp = events.buf;
376 /* the concern here is page faults in memmove below */
391 eventlog(char *fmt, ...)
401 n = vsnprint(p, Eventlen-1, fmt, arg);
403 p = events.wp += Eventlen;
404 if(p >= events.buf + sizeof events.buf)
405 p = events.wp = events.buf;
422 n = events.wp - events.rp & Nevents - 1;
445 t = ++d->lasttag << 16;
447 } while (t == Tfree || t == Tmgmt);
452 downdev(Aoedev *d, char *err)
460 frameerror(d, f, Enotup);
462 eventlog("%æ: removed; %s\n", d, err);
471 len = f->nhdr + f->dlen;
475 memmove(b->wp, f->hdr, f->nhdr);
477 memmove(b->wp + f->nhdr, f->dp, f->dlen);
483 putlba(Aoeata *a, vlong lba)
497 pickdevlink(Aoedev *d)
502 for(i = 0; i < d->ndl; i++){
503 n = d->dlidx++ % d->ndl;
505 if(l && l->flag & Dup)
518 return l->eaidx++ % l->nea;
522 * would like this to depend on the chan (srb).
523 * not possible in the current structure.
525 #define Nofail(d, s) (((d)->flag&Dnofail) == Dnofail)
528 hset(Aoedev *d, Frame *f, Aoehdr *h, int cmd, int new)
534 if((long)(Ticks-f->srb->ticksent) > Srbtimeout){
535 eventlog("%æ: srb timeout\n", d);
536 if(cmd == ACata && Nofail(d, s))
537 f->srb->ticksent = Ticks;
539 frameerror(d, f, Etimedout);
545 if(!(cmd == ACata && f->srb && Nofail(d, s)))
546 downdev(d, "resend fails; no netlink/ea");
549 memmove(h->dst, l->eatab[i], Eaddrlen);
550 memmove(h->src, l->nl->ea, sizeof h->src);
551 hnputs(h->type, Aoetype);
552 h->verflag = Aoever << 4;
554 hnputs(h->major, d->major);
560 hnputl(h->tag, f->tag);
570 resend(Aoedev *d, Frame *f)
577 if(hset(d, f, h, h->cmd, 0) == -1)
579 a = (Aoeata*)(f->hdr + Aoehsz);
582 n = d->maxbcnt; /* mtu mismatch (jumbo fail?) */
586 a->scnt = n / Aoesectsz;
590 /* should remove the netlink */
592 devtab[f->nl->dc->type]->bwrite(f->nl->dc, allocfb(f), 0);
598 discover(uint major, uint minor)
605 e = nl + nelem(netlinks.nl);
609 b = allocb(ETHERMINTU);
614 b->wp = b->rp + ETHERMINTU;
615 memset(b->rp, 0, ETHERMINTU);
617 memset(h->dst, 0xff, sizeof h->dst);
618 memmove(h->src, nl->ea, sizeof h->src);
619 hnputs(h->type, Aoetype);
620 h->verflag = Aoever << 4;
621 hnputs(h->major, major);
625 devtab[nl->dc->type]->bwrite(nl->dc, b, 0);
630 * Check all frames on device and resend any frames that have been
631 * outstanding for 200% of the device round trip time average.
636 ulong i, tx, timeout, nbc;
638 enum { Nms = 100, Nbcms = 30*1000, };
648 if(rediscover && !waserror()){
649 discover(0xffff, 0xff);
656 for(d = devs.d; d; d = d->next){
670 timeout = l->rttavg << 1;
674 if(d->nout == d->maxout){
679 a = (Aoeata*)(f->hdr + Aoehsz);
680 if(a->scnt > Dbcnt / Aoesectsz &&
681 ++f->nl->lostjumbo > (d->nframes << 1)){
682 ea = f->dl->eatab[f->eaidx];
683 eventlog("%æ: jumbo failure on %s:%E; %llud\n",
684 d, f->nl->path, ea, f->lba);
690 if((l->rttavg <<= 1) > Rtmax)
692 eventlog("%æ: rtt %ldms\n", d, Tk2ms(l->rttavg));
695 if(d->nout == d->maxout && d->maxout < d->nframes &&
696 TK2MS(Ticks-d->lastwadj) > 10*1000){
703 i = Nms - TK2MS(Ticks - starttick);
705 tsleep(&up->sleep, return0, 0, i);
715 d = va_arg(f->args, Aoedev*);
716 snprint(buf, sizeof buf, "aoe%ud.%ud", d->major, d->minor);
717 return fmtstrcpy(f, buf);
720 static void netbind(char *path);
725 char *p, *f[32], buf[24], ifbuf[64];
728 if((p = getconf("aoeif")) == nil)
730 strncpy(ifbuf, p, sizeof(ifbuf)-1);
731 ifbuf[sizeof(ifbuf)-1] = 0;
732 if((n = tokenize(ifbuf, f, nelem(f))) < 1)
735 for(i = 0; i < n; i++){
737 if(strncmp(p, "ether", 5) == 0)
738 snprint(buf, sizeof buf, "#l%c/ether%c", p[5], p[5]);
739 else if(strncmp(p, "#l", 2) == 0)
740 snprint(buf, sizeof buf, "#l%c/ether%c", p[2], p[2]);
759 fmtinstall(L'æ', fmtæ);
760 events.rp = events.wp = events.buf;
761 kproc("aoesweep", aoesweepproc, nil);
769 aoeattach(char *spec)
776 c = devattach(L'æ', spec);
777 mkqid(&c->qid, Qzero, 0, QTDIR);
782 unitseq(Chan *c, uint unit, Dir *dp)
791 for(d = devs.d; d; d = d->next)
793 mkqid(&q, QID(d->unit, Qunitdir), 0, QTDIR);
794 devdir(c, q, unitname(d), 0, eve, 0555, dp);
808 for(d = devs.d; d; d = d->next)
814 error("unit lookup failure");
819 unitgen(Chan *c, ulong type, Dir *dp)
828 d = unit2dev(UNIT(c->qid));
854 size = sizeof d->ident;
862 mkqid(&q, QID(UNIT(c->qid), type), vers, t);
863 devdir(c, q, p, size, eve, perm, dp);
868 topgen(Chan *c, ulong type, Dir *d)
889 mkqid(&q, type, 0, QTFILE);
890 devdir(c, q, p, size, eve, perm, d);
895 aoegen(Chan *c, char *, Dirtab *, int, int s, Dir *dp)
901 if(c->qid.path == 0){
906 devdir(c, q, "#æ", 0, eve, 0555, dp);
911 devdir(c, q, "aoe", 0, eve, 0555, dp);
919 switch(TYPE(c->qid)){
924 mkqid(&q, Qzero, 0, QTDIR);
925 devdir(c, q, "aoe", 0, eve, 0555, dp);
929 return topgen(c, Qtopbase + s, dp);
931 return unitseq(c, s, dp);
934 return topgen(c, TYPE(c->qid), dp);
937 mkqid(&q, QID(0, Qtopdir), 0, QTDIR);
938 uprint("%uld", UNIT(c->qid));
939 devdir(c, q, up->genbuf, 0, eve, 0555, dp);
942 return unitgen(c, Qunitbase+s, dp);
947 return unitgen(c, TYPE(c->qid), dp);
951 mkqid(&q, QID(i, Qunitdir), 0, QTDIR);
952 devdir(c, q, "devlink", 0, eve, 0555, dp);
961 mkqid(&q, Q3(s, i, Qdevlink), 0, QTFILE);
962 devdir(c, q, up->genbuf, 0, eve, 0755, dp);
966 mkqid(&q, Q3(s, UNIT(c->qid), Qdevlink), 0, QTFILE);
967 devdir(c, q, up->genbuf, 0, eve, 0755, dp);
973 aoewalk(Chan *c, Chan *nc, char **name, int nname)
975 return devwalk(c, nc, name, nname, nil, 0, aoegen);
979 aoestat(Chan *c, uchar *db, int n)
981 return devstat(c, db, n, nil, 0, aoegen);
985 aoeopen(Chan *c, int omode)
989 if(TYPE(c->qid) != Qdata)
990 return devopen(c, omode, 0, 0, aoegen);
992 d = unit2dev(UNIT(c->qid));
1000 c = devopen(c, omode, 0, 0, aoegen);
1012 if(TYPE(c->qid) != Qdata || (c->flag&COPEN) == 0)
1015 d = unit2dev(UNIT(c->qid));
1017 if(--d->nopen == 0 && !waserror()){
1018 discover(d->major, d->minor);
1025 atarw(Aoedev *d, Frame *f)
1028 char extbit, writebit;
1040 f->nhdr = Aoehsz + Aoeatasz;
1041 memset(f->hdr, 0, f->nhdr);
1042 h = (Aoehdr*)f->hdr;
1043 if(hset(d, f, h, ACata, 1) == -1){
1047 ah = (Aoeata*)(f->hdr + Aoehsz);
1050 f->lba = srb->sector;
1053 ah->scnt = bcnt / Aoesectsz;
1056 ah->aflag |= AAFext;
1060 ah->lba[3] |= 0xe0; /* LBA bit+obsolete 0xa0 */
1063 ah->aflag |= AAFwrite;
1069 ah->cmdstat = 0x20 | writebit | extbit;
1071 /* mark tracking fields and load out */
1073 srb->dp = (uchar*)srb->dp + bcnt;
1075 srb->sector += bcnt / Aoesectsz;
1081 frameerror(d, f, "write error");
1083 devtab[f->nl->dc->type]->bwrite(f->nl->dc, allocfb(f), 0);
1092 static char *errs[] = {
1093 "aoe protocol error: unknown",
1094 "aoe protocol error: bad command code",
1095 "aoe protocol error: bad argument param",
1096 "aoe protocol error: device unavailable",
1097 "aoe protocol error: config string present",
1098 "aoe protocol error: unsupported version",
1099 "aoe protocol error: target is reserved",
1102 if((h->verflag & AFerr) == 0)
1111 rtupdate(Devlink *l, int rtt)
1122 l->mintimer += (n - l->mintimer) >> 1;
1123 } else if(n < l->mintimer)
1128 /* g == .25; cf. Congestion Avoidance and Control, Jacobson&Karels; 1988 */
1130 l->rttavg += n >> 2;
1134 getframe(Aoedev *d, int tag)
1147 freeframe(Aoedev *d)
1149 if(d->nout < d->maxout)
1150 return getframe(d, Tfree);
1159 while(f = freeframe(d)) {
1160 if(d->inprocess == nil){
1163 d->inprocess = d->head;
1164 d->head = d->head->next;
1173 strategy(Aoedev *d, Srb *srb)
1184 d->tail->next = srb;
1194 srberror(d, srb, "interrupted");
1197 sleep(srb, srbready, srb);
1201 #define iskaddr(a) ((uintptr)(a) > KZERO)
1204 rw(Aoedev *d, int write, uchar *db, long len, uvlong off)
1207 enum { Srbsz = 1<<19, };
1210 if((off|len) & (Aoesectsz-1))
1211 error("offset and length must be sector multiple.\n");
1216 if(off + len > d->bsize)
1217 len = d->bsize - off;
1220 srb = srbkalloc(db, len);
1223 srb = srballoc(Srbsz <= len? Srbsz: len);
1229 for(nlen = len; nlen; nlen -= n){
1230 srb->sector = off / Aoesectsz;
1231 srb->dp = srb->data;
1237 memmove(srb->data, db, n);
1242 memmove(db, srb->data, n);
1252 readmem(ulong off, void *dst, long n, void *src, long size)
1258 memmove(dst, (uchar*)src + off, n);
1263 aoeflag(char *s, char *e, uchar f)
1267 for(i = 0; i < nelem(flagname); i++)
1269 s = seprint(s, e, "%s ", flagname[i]);
1270 return seprint(s, e, "\n");
1274 pstat(Aoedev *d, char *db, int len, int off)
1277 char *state, *s, *p, *e;
1279 s = p = smalloc(READSTR);
1287 "state: %s\n" "nopen: %d\n" "nout: %d\n"
1288 "nmaxout: %d\n" "nframes: %d\n" "maxbcnt: %d [maxmtu %d]\n"
1290 "model: %s\n" "serial: %s\n" "firmware: %s\n",
1291 state, d->nopen, d->nout,
1292 d->maxout, d->nframes, d->maxbcnt, d->maxmtu,
1294 d->model, d->serial, d->firmware);
1295 p = seprint(p, e, "flag: ");
1297 p[-1] = ' '; /* horrid */
1298 p = aoeflag(p, e, d->flag);
1302 i = readstr(off, db, len, s);
1308 unitread(Chan *c, void *db, long len, vlong off)
1312 d = unit2dev(UNIT(c->qid));
1313 if(d->vers != c->qid.vers)
1315 switch(TYPE(c->qid)){
1319 return pstat(d, db, len, off);
1321 return rw(d, Read, db, len, off);
1325 return readmem(off, db, len, d->config, d->nconfig);
1329 return readmem(off, db, len, d->ident, sizeof d->ident);
1340 if(m == nil || waserror())
1342 n = devtab[m->type]->read(m, buf, sizeof buf - 1, 0);
1346 mtu = strtoul(buf + 12, 0, 0);
1352 devlinkread(Chan *c, void *db, int len, int off)
1359 d = unit2dev(UNIT(c->qid));
1365 s = p = smalloc(READSTR);
1368 p = seprint(p, e, "addr: ");
1369 for(i = 0; i < l->nea; i++)
1370 p = seprint(p, e, "%E ", l->eatab[i]);
1371 p = seprint(p, e, "\n");
1372 p = seprint(p, e, "npkt: %uld\n", l->npkt);
1373 p = seprint(p, e, "resent: %uld\n", l->resent);
1374 p = seprint(p, e, "flag: ");
1375 p = aoeflag(p, e, l->flag);
1376 p = seprint(p, e, "rttavg: %uld\n", Tk2ms(l->rttavg));
1377 p = seprint(p, e, "mintimer: %uld\n", Tk2ms(l->mintimer));
1378 p = seprint(p, e, "datamtu: %d\n", l->datamtu);
1380 p = seprint(p, e, "nl path: %s\n", l->nl->path);
1381 p = seprint(p, e, "nl ea: %E\n", l->nl->ea);
1382 p = seprint(p, e, "nl flag: ");
1383 p = aoeflag(p, e, l->flag);
1384 p = seprint(p, e, "nl lostjumbo: %d\n", l->nl->lostjumbo);
1385 p = seprint(p, e, "nl datamtu: %d\n", getmtu(l->nl->mtu));
1389 i = readstr(off, db, len, s);
1395 topctlread(Chan *, void *db, int len, int off)
1401 s = p = smalloc(READSTR);
1404 p = seprint(p, e, "debug: %d\n", debug);
1405 p = seprint(p, e, "autodiscover: %d\n", autodiscover);
1406 p = seprint(p, e, "rediscover: %d\n", rediscover);
1408 for(i = 0; i < Nnetlink; i++){
1412 p = seprint(p, e, "if%d path: %s\n", i, n->path);
1413 p = seprint(p, e, "if%d ea: %E\n", i, n->ea);
1414 p = seprint(p, e, "if%d flag: ", i);
1415 p = aoeflag(p, e, n->flag);
1416 p = seprint(p, e, "if%d lostjumbo: %d\n", i, n->lostjumbo);
1417 p = seprint(p, e, "if%d datamtu: %d\n", i, getmtu(n->mtu));
1422 i = readstr(off, db, len, s);
1428 aoeread(Chan *c, void *db, long n, vlong off)
1430 switch(TYPE(c->qid)){
1437 return devdirread(c, db, n, 0, 0, aoegen);
1439 return topctlread(c, db, n, off);
1441 return eventlogread(db, n);
1446 return unitread(c, db, n, off);
1448 return devlinkread(c, db, n, off);
1453 configwrite(Aoedev *d, void *db, long len)
1463 if(len > sizeof d->config)
1465 srb = srballoc(len);
1467 memmove(s, db, len);
1486 tsleep(&up->sleep, return0, 0, 100);
1489 f->nhdr = Aoehsz + Aoecfgsz;
1490 memset(f->hdr, 0, f->nhdr);
1491 h = (Aoehdr*)f->hdr;
1492 if(hset(d, f, h, ACconfig, 1) == -1)
1494 ch = (Aoecfg*)(f->hdr + Aoehsz);
1497 ch->verccmd = AQCfset;
1498 hnputs(ch->cslen, len);
1504 * these refer to qlock & waserror in the above for loop.
1505 * there's still the first waserror outstanding.
1510 devtab[f->nl->dc->type]->bwrite(f->nl->dc, allocfb(f), 0);
1511 sleep(srb, srbready, srb);
1520 memmove(d->config, s, len);
1525 poperror(); /* pop first waserror */
1528 memmove(db, s, len);
1534 devmaxdata(Aoedev *d)
1536 int i, m, mtu, datamtu;
1542 for(i = 0; i < d->ndl; i++){
1545 if((l->flag & Dup) == 0 || (n->flag & Dup) == 0)
1548 if(l->datamtu < datamtu)
1549 datamtu = l->datamtu;
1555 mtu -= Aoehsz + Aoeatasz;
1556 mtu -= mtu % Aoesectsz;
1563 toggle(char *s, uint f, uint bit)
1567 else if(strcmp(s, "on") == 0)
1574 static void ataident(Aoedev*);
1577 unitctlwrite(Aoedev *d, void *db, long n)
1592 static Cmdtab cmds[] = {
1593 {Failio, "failio", 1 },
1594 {Ident, "identify", 1 },
1595 {Jumbo, "jumbo", 0 },
1596 {Maxbno, "maxbno", 0 },
1598 {Nofailf, "nofail", 0 },
1599 {Setsize, "setsize", 0 },
1602 cb = parsecmd(db, n);
1609 ct = lookupcmd(cb, cmds, nelem(cmds));
1612 downdev(d, "i/o failure");
1618 d->flag = toggle(cb->f[1], d->flag, Djumbo);
1622 maxbcnt = devmaxdata(d);
1626 m = strtoul(cb->f[1], 0, 0);
1627 if(ct->index == Maxbno)
1630 m -= Aoehsz + Aoeatasz;
1631 m &= ~(Aoesectsz-1);
1633 if(m == 0 || m > maxbcnt)
1634 cmderror(cb, "invalid mtu");
1639 d->maxbcnt = maxbcnt;
1642 d->flag = toggle(cb->f[1], d->flag, Dnofail);
1645 bsize = d->realbsize;
1649 bsize = strtoull(cb->f[1], 0, 0);
1650 if(bsize % Aoesectsz)
1651 cmderror(cb, "disk size must be sector aligned");
1663 unitwrite(Chan *c, void *db, long n, vlong off)
1669 d = unit2dev(UNIT(c->qid));
1670 switch(TYPE(c->qid)){
1674 return unitctlwrite(d, db, n);
1678 return rw(d, Write, db, n, off);
1680 if(off + n > sizeof d->config)
1682 buf = smalloc(sizeof d->config);
1687 memmove(buf, d->config, d->nconfig);
1688 memmove(buf + off, db, n);
1689 rv = configwrite(d, buf, n + off);
1697 addnet(char *path, Chan *cc, Chan *dc, Chan *mtu, uchar *ea)
1707 e = nl + nelem(netlinks.nl);
1708 for(; nl < e && nl->cc; nl++)
1711 error("out of netlink structures");
1715 strncpy(nl->path, path, sizeof(nl->path)-1);
1716 nl->path[sizeof(nl->path)-1] = 0;
1717 memmove(nl->ea, ea, sizeof nl->ea);
1730 if(units.ref == Maxunits)
1750 * always allocate max frames. maxout may change.
1753 newdev(uint major, uint minor, int n)
1758 d = malloc(sizeof *d);
1759 f = malloc(sizeof *f*Maxframes);
1760 if(d == nil || f == nil) {
1763 error("aoe device allocation failure");
1767 for (e = f + Maxframes; f < e; f++)
1775 d->unit = newunit(); /* bzzt. inaccurate if units removed */
1779 error("too many units");
1786 mm2dev(uint major, uint minor)
1791 for(d = devs.d; d; d = d->next)
1792 if(d->major == major && d->minor == minor){
1797 eventlog("mm2dev: %ud.%ud not found\n", major, minor);
1801 /* Find the device in our list. If not known, add it */
1803 getdev(uint major, uint minor, int n)
1807 if(major == 0xffff || minor == 0xff)
1814 for(d = devs.d; d; d = d->next)
1815 if(d->major == major && d->minor == minor)
1818 d = newdev(major, minor, n);
1837 f->nhdr = Aoehsz + Aoeatasz;
1838 memset(f->hdr, 0, f->nhdr);
1839 h = (Aoehdr*)f->hdr;
1840 if(hset(d, f, h, ACata, 1) == -1)
1842 a = (Aoeata*)(f->hdr + Aoehsz);
1843 f->srb = srbkalloc(0, 0);
1844 a->cmdstat = Cid; /* ata 6, page 110 */
1856 devtab[f->nl->dc->type]->bwrite(f->nl->dc, allocfb(f), 0);
1862 newdlea(Devlink *l, uchar *ea)
1867 for(i = 0; i < Nea; i++){
1870 memmove(t, ea, Eaddrlen);
1873 if(memcmp(t, ea, Eaddrlen) == 0)
1880 newdevlink(Aoedev *d, Netlink *n, Aoehdr *h)
1886 c = (Aoecfg*)((uchar*)h + Aoehsz);
1887 for(i = 0; i < Ndevlink; i++){
1892 l->datamtu = c->scnt*Aoesectsz;
1895 l->mintimer = Rtmin;
1901 l->datamtu = c->scnt*Aoesectsz;
1906 eventlog("%æ: out of links: %s:%E to %E\n", d, n->path, n->ea, h->src);
1911 errrsp(Block *b, char *s)
1920 if(n == Tmgmt || n == Tfree)
1922 d = mm2dev(nhgets(h->major), h->minor);
1925 if(f = getframe(d, n))
1926 frameerror(d, f, s);
1930 qcfgrsp(Block *b, Netlink *nl)
1932 int cmd, cslen, blen;
1942 ch = (Aoecfg*)(b->rp + Aoehsz);
1943 major = nhgets(h->major);
1945 if(n != Tmgmt && n != Tfree){
1946 d = mm2dev(major, h->minor);
1953 eventlog("%æ: unknown response tag %ux\n", d, n);
1956 h0 = (Aoehdr*)f->hdr;
1958 if(cmd != ACconfig){
1960 eventlog("%æ: malicious server got ACconfig want %d; tag %ux\n", d, cmd, n);
1963 cslen = nhgets(ch->cslen);
1964 blen = BLEN(b) - (Aoehsz + Aoecfgsz);
1965 if(cslen < blen && BLEN(b) > 60)
1966 eventlog("%æ: cfgrsp: tag %.8ux oversized %d %d\n",
1969 eventlog("%æ: cfgrsp: tag %.8ux runt %d %d\n",
1973 memmove(f->dp, b->rp + Aoehsz + Aoecfgsz, cslen);
1987 cmd = ch->verccmd & 0xf;
1989 eventlog("aoe%ud.%ud: cfgrsp: bad command %d\n", major, h->minor, cmd);
1992 n = nhgets(ch->bufcnt);
1997 eventlog("getdev: %ud.%ud ignored: %s\n", major, h->minor, up->errstr);
2000 d = getdev(major, h->minor, n);
2009 eventlog("%æ: %s\n", d, up->errstr);
2013 l = newdevlink(d, nl, h); /* add this interface. */
2015 d->fwver = nhgets(ch->fwver);
2016 cslen = nhgets(ch->cslen);
2017 if(cslen > sizeof d->config)
2018 cslen = sizeof d->config;
2019 if(Aoehsz + Aoecfgsz + cslen > BLEN(b))
2020 cslen = BLEN(b) - (Aoehsz + Aoecfgsz);
2022 memmove(d->config, b->rp + Aoehsz + Aoecfgsz, cslen);
2024 /* manually set mtu may be reset lower if conditions warrant */
2027 if((d->flag & Djumbo) == 0)
2031 if(n != d->maxbcnt){
2032 eventlog("%æ: setting %d byte mtu on %s:%E\n",
2033 d, n, nl->path, nl->ea);
2044 aoeidentify(Aoedev *d, ushort *id)
2050 eventlog("%æ: idfeat returns -1\n", d);
2053 if((d->feat&Dlba) == 0){
2054 eventlog("%æ: no lba support\n", d);
2058 memmove(d->ident, id, sizeof d->ident);
2066 d->vers = drivevers.ref++;
2071 identify(Aoedev *d, ushort *id)
2076 s = aoeidentify(d, id);
2079 osectors = d->realbsize;
2080 memmove(oserial, d->serial, sizeof d->serial);
2082 idmove(d->serial, id+10, 20);
2083 idmove(d->firmware, id+23, 8);
2084 idmove(d->model, id+27, 40);
2086 /* d->wwn = idwwn(d, id); */
2089 if(osectors != s || memcmp(oserial, d->serial, sizeof oserial)){
2092 // d->mediachange = 1;
2103 Aoeata *ahin, *ahout;
2110 major = nhgets(h->major);
2111 d = mm2dev(major, h->minor);
2114 ahin = (Aoeata*)(b->rp + Aoehsz);
2121 if(n == Tfree || n == Tmgmt)
2125 eventlog("%æ: unexpected response; tag %ux\n", d, n);
2128 h0 = (Aoehdr*)f->hdr;
2131 eventlog("%æ: malicious server got ACata want %d; tag %ux\n", d, cmd, n);
2135 rtupdate(f->dl, tsince(f->tag));
2136 ahout = (Aoeata*)(f->hdr + Aoehsz);
2139 if(ahin->cmdstat & 0xa9){
2140 eventlog("%æ: ata error cmd %.2ux stat %.2ux\n",
2141 d, ahout->cmdstat, ahin->cmdstat);
2145 n = ahout->scnt * Aoesectsz;
2146 switch(ahout->cmdstat){
2149 if(BLEN(b) - (Aoehsz + Aoeatasz) != n){
2150 eventlog("%æ: misread blen %ld expect %d\n",
2154 memmove(f->dp, b->rp + Aoehsz + Aoeatasz, n);
2158 f->nl->lostjumbo = 0;
2160 f->lba += n / Aoesectsz;
2161 f->dp = (uchar*)f->dp + n;
2167 if(BLEN(b) - (Aoehsz + Aoeatasz) < 512){
2168 eventlog("%æ: runt identify blen %ld expect %d\n",
2169 d, BLEN(b), 512 + Aoehsz + Aoeatasz);
2172 identify(d, (ushort*)(b->rp + Aoehsz + Aoeatasz));
2173 free(srb); /* BOTCH */
2177 eventlog("%æ: unknown ata command %.2ux \n",
2197 netrdaoeproc(void *v)
2200 char name[Maxpath+1], *s;
2206 idx = nl - netlinks.nl;
2207 netlinks.reader[idx] = 1;
2208 kstrcpy(name, nl->path, Maxpath);
2211 eventlog("netrdaoe@%s: exiting: %s\n", name, up->errstr);
2212 netlinks.reader[idx] = 0;
2213 wakeup(netlinks.rendez + idx);
2214 pexit(up->errstr, 1);
2217 discover(0xffff, 0xff);
2219 if((nl->flag & Dup) == 0)
2220 error("netlink is down");
2222 panic("netrdaoe: nl->dc == nil");
2223 b = devtab[nl->dc->type]->bread(nl->dc, 1<<16, 0);
2225 error("network read");
2227 if(h->verflag & AFrsp)
2228 if(s = aoeerror(h)){
2229 eventlog("%s: %d.%d %s\n", nl->path,
2230 h->major[0]<<8 | h->major[1], h->minor, s);
2232 }else if(h->cmd == ACata)
2234 else if(h->cmd == ACconfig)
2236 else if((h->cmd & 0xf0) != 0xf0){
2237 eventlog("%s: unknown cmd %d\n",
2239 errrsp(b, "unknown command");
2246 getaddr(char *path, uchar *ea)
2249 char buf[2*Eaddrlen+1];
2252 uprint("%s/addr", path);
2253 c = namec(up->genbuf, Aopen, OREAD, 0);
2259 panic("æ: getaddr: c == nil");
2260 n = devtab[c->type]->read(c, buf, sizeof buf-1, 0);
2264 if(parseether(ea, buf) < 0)
2265 error("parseether failure");
2272 uchar ea[2*Eaddrlen+1];
2273 Chan *dc, *cc, *mtu;
2276 snprint(addr, sizeof addr, "%s!0x%x", path, Aoetype);
2277 dc = chandial(addr, nil, nil, &cc);
2278 snprint(addr, sizeof addr, "%s/mtu", path);
2282 mtu = namec(addr, Aopen, OREAD, 0);
2293 if(dc == nil || cc == nil)
2296 nl = addnet(path, cc, dc, mtu, ea);
2297 snprint(addr, sizeof addr, "netrdaoe@%s", path);
2298 kproc(addr, netrdaoeproc, nl);
2305 return *(int*)v != 0;
2309 netunbind(char *path)
2312 Aoedev *d, *p, *next;
2319 e = n + nelem(netlinks.nl);
2323 if(n->dc && strcmp(n->path, path) == 0)
2327 error("device not bound");
2330 * hunt down devices using this interface; disable
2331 * this also terminates the reader.
2333 idx = n - netlinks.nl;
2335 for(d = devs.d; d; d = d->next){
2337 for(i = 0; i < d->ndl; i++){
2347 /* confirm reader is down. */
2350 sleep(netlinks.rendez + idx, unbound, netlinks.reader + idx);
2353 /* reschedule packets. */
2355 for(d = devs.d; d; d = d->next){
2357 for(i = 0; i < d->nframes; i++){
2359 if(f->tag != Tfree && f->nl == n)
2366 /* squeeze devlink pool. (we assert nobody is using them now) */
2368 for(d = devs.d; d; d = d->next){
2370 for(i = 0; i < d->ndl; i++){
2373 memmove(l, l + 1, sizeof *l * (--d->ndl - i));
2379 /* close device link. */
2385 memset(n, 0, sizeof *n);
2391 /* squeeze orphan devices */
2393 for(p = d = devs.d; d; d = next){
2400 downdev(d, "orphan");
2416 strtoss(char *f, uint *shelf, uint *slot)
2424 *shelf = strtol(f, &s, 0);
2425 if(s == f || *shelf > 0xffff)
2429 *slot = strtol(f, &s, 0);
2430 if(s == f || *slot > 0xff)
2436 discoverstr(char *f)
2440 strtoss(f, &shelf, &slot);
2441 discover(shelf, slot);
2445 removedev(Aoedev *d)
2453 for(p = devs.d; p; p = p->next)
2461 for(i = 0; i < d->nframes; i++)
2462 frameerror(d, d->frames+i, Enotup);
2478 switch(TYPE(c->qid)){
2490 removedev(unit2dev(UNIT(c->qid)));
2501 strtoss(f, &shelf, &slot);
2503 for(d = devs.d; d; d = d->next)
2504 if(shelf == d->major && slot == d->minor){
2505 wunlock(&devs); /* BOTCH */
2510 error("device not bound");
2514 topctlwrite(void *db, long n)
2528 static Cmdtab cmds[] = {
2529 { Autodiscover, "autodiscover", 0 },
2530 { Bind, "bind", 2 },
2531 { Debug, "debug", 0 },
2532 { Discover, "discover", 0 },
2533 { Rediscover, "rediscover", 0 },
2534 { Remove, "remove", 2 },
2535 { Unbind, "unbind", 2 },
2538 cb = parsecmd(db, n);
2543 ct = lookupcmd(cb, cmds, nelem(cmds));
2547 autodiscover = toggle(f, autodiscover, 1);
2553 debug = toggle(f, debug, 1);
2559 rediscover = toggle(f, rediscover, 1);
2562 removestr(f); /* depricated */
2574 aoewrite(Chan *c, void *db, long n, vlong off)
2576 switch(TYPE(c->qid)){
2584 return topctlwrite(db, n);
2589 return unitwrite(c, db, n, off);