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- /*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
- #include "u.h"
- #include "../port/lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "../port/error.h"
- #include <authsrv.h>
- enum
- {
- Nconsdevs = 64, /* max number of consoles */
- /* Consdev flags */
- Ciprint = 2, /* call this fn from iprint */
- Cntorn = 4, /* change \n to \r\n */
- };
- typedef struct Consdev Consdev;
- struct Consdev
- {
- Chan* c; /* external file */
- Queue* q; /* i/o queue, if any */
- void (*fn)(char*, int); /* i/o function when no queue */
- int flags;
- };
- void (*consdebug)(void) = nil;
- void (*consputs)(char*, int) = nil;
- static void kmesgputs(char *, int);
- static void kprintputs(char*, int);
- static Lock consdevslock;
- static int nconsdevs = 3;
- static Consdev consdevs[Nconsdevs] = /* keep this order */
- {
- {nil, nil, kmesgputs, 0}, /* kmesg */
- {nil, nil, kprintputs, Ciprint}, /* kprint */
- {nil, nil, uartputs, Ciprint|Cntorn}, /* serial */
- };
- static int nkbdqs;
- static int nkbdprocs;
- static Queue* kbdqs[Nconsdevs];
- static int kbdprocs[Nconsdevs];
- static Queue* kbdq; /* unprocessed console input */
- static Queue* lineq; /* processed console input */
- static Queue* serialoq; /* serial console output */
- static Queue* kprintoq; /* console output, for /dev/kprint */
- static uint32_t kprintinuse; /* test and set whether /dev/kprint is open */
- int panicking;
- static struct
- {
- QLock;
- int raw; /* true if we shouldn't process input */
- Ref ctl; /* number of opens to the control file */
- int x; /* index into line */
- char line[1024]; /* current input line */
- int count;
- int ctlpoff;
- /*
- * A place to save up characters at interrupt time
- * before dumping them in the queue
- */
- Lock lockputc;
- char istage[1024];
- char *iw;
- char *ir;
- char *ie;
- } kbd = {
- .iw = kbd.istage,
- .ir = kbd.istage,
- .ie = kbd.istage + sizeof(kbd.istage),
- };
- char *sysname;
- int64_t fasthz;
- static void seedrand(void);
- static int readtime(uint32_t, char*, int);
- static int readbintime(char*, int);
- static int writetime(char*, int);
- static int writebintime(char*, int);
- enum
- {
- CMhalt,
- CMreboot,
- CMpanic,
- };
- Cmdtab rebootmsg[] =
- {
- CMhalt, "halt", 1,
- CMreboot, "reboot", 0,
- CMpanic, "panic", 0,
- };
- /* To keep the rest of the kernel unware of new consdevs for now */
- static void
- kprintputs(char *s, int n)
- {
- if(consputs != nil)
- consputs(s, n);
- }
- int
- addconsdev(Queue *q, void (*fn)(char*,int), int i, int flags)
- {
- Consdev *c;
- ilock(&consdevslock);
- if(i < 0)
- i = nconsdevs;
- else
- flags |= consdevs[i].flags;
- if(nconsdevs == Nconsdevs)
- panic("Nconsdevs too small");
- c = &consdevs[i];
- c->flags = flags;
- c->q = q;
- c->fn = fn;
- if(i == nconsdevs)
- nconsdevs++;
- iunlock(&consdevslock);
- return i;
- }
- void
- delconsdevs(void)
- {
- nconsdevs = 2; /* throw away serial consoles and kprint */
- consdevs[1].q = nil;
- }
- static void
- conskbdqproc(void *a)
- {
- char buf[64];
- Queue *q;
- int nr;
- q = a;
- while((nr = qread(q, buf, sizeof(buf))) > 0)
- qwrite(kbdq, buf, nr);
- pexit("hangup", 1);
- }
- static void
- kickkbdq(void)
- {
- int i;
- if(up != nil && nkbdqs > 1 && nkbdprocs != nkbdqs){
- lock(&consdevslock);
- if(nkbdprocs == nkbdqs){
- unlock(&consdevslock);
- return;
- }
- for(i = 0; i < nkbdqs; i++)
- if(kbdprocs[i] == 0){
- kbdprocs[i] = 1;
- kproc("conskbdq", conskbdqproc, kbdqs[i]);
- }
- unlock(&consdevslock);
- }
- }
- int
- addkbdq(Queue *q, int i)
- {
- int n;
- ilock(&consdevslock);
- if(i < 0)
- i = nkbdqs++;
- if(nkbdqs == Nconsdevs)
- panic("Nconsdevs too small");
- kbdqs[i] = q;
- n = nkbdqs;
- iunlock(&consdevslock);
- switch(n){
- case 1:
- /* if there's just one, pull directly from it. */
- kbdq = q;
- break;
- case 2:
- /* later we'll merge bytes from all kbdqs into a single kbdq */
- kbdq = qopen(4*1024, 0, 0, 0);
- if(kbdq == nil)
- panic("no kbdq");
- /* fall */
- default:
- kickkbdq();
- }
- return i;
- }
- void
- printinit(void)
- {
- lineq = qopen(2*1024, 0, nil, nil);
- if(lineq == nil)
- panic("printinit");
- qnoblock(lineq, 1);
- }
- int
- consactive(void)
- {
- int i;
- Queue *q;
- for(i = 0; i < nconsdevs; i++)
- if((q = consdevs[i].q) != nil && qlen(q) > 0)
- return 1;
- return 0;
- }
- void
- prflush(void)
- {
- uint32_t now;
- now = m->ticks;
- while(consactive())
- if(m->ticks - now >= HZ)
- break;
- }
- /*
- * Log console output so it can be retrieved via /dev/kmesg.
- * This is good for catching boot-time messages after the fact.
- */
- struct {
- Lock lk;
- char buf[16384];
- uint n;
- } kmesg;
- static void
- kmesgputs(char *str, int n)
- {
- uint nn, d;
- ilock(&kmesg.lk);
- /* take the tail of huge writes */
- if(n > sizeof kmesg.buf){
- d = n - sizeof kmesg.buf;
- str += d;
- n -= d;
- }
- /* slide the buffer down to make room */
- nn = kmesg.n;
- if(nn + n >= sizeof kmesg.buf){
- d = nn + n - sizeof kmesg.buf;
- if(d)
- memmove(kmesg.buf, kmesg.buf+d, sizeof kmesg.buf-d);
- nn -= d;
- }
- /* copy the data in */
- memmove(kmesg.buf+nn, str, n);
- nn += n;
- kmesg.n = nn;
- iunlock(&kmesg.lk);
- }
- static void
- consdevputs(Consdev *c, char *s, int n, int usewrite)
- {
- Chan *cc;
- Queue *q;
- if((cc = c->c) != nil && usewrite)
- cc->dev->write(cc, s, n, 0);
- else if((q = c->q) != nil && !qisclosed(q))
- if(usewrite)
- qwrite(q, s, n);
- else
- qiwrite(q, s, n);
- else if(c->fn != nil)
- c->fn(s, n);
- }
- /*
- * Print a string on the console. Convert \n to \r\n for serial
- * line consoles. Locking of the queues is left up to the screen
- * or uart code. Multi-line messages to serial consoles may get
- * interspersed with other messages.
- */
- static void
- putstrn0(char *str, int n, int usewrite)
- {
- Consdev *c;
- char *s, *t;
- int i, len, m;
- if(!islo())
- usewrite = 0;
- for(i = 0; i < nconsdevs; i++){
- c = &consdevs[i];
- len = n;
- s = str;
- while(len > 0){
- t = nil;
- if((c->flags&Cntorn) && !kbd.raw)
- t = memchr(s, '\n', len);
- if(t != nil && !kbd.raw){
- m = t-s;
- consdevputs(c, s, m, usewrite);
- consdevputs(c, "\r\n", 2, usewrite);
- len -= m+1;
- s = t+1;
- }else{
- consdevputs(c, s, len, usewrite);
- break;
- }
- }
- }
- }
- void
- putstrn(char *str, int n)
- {
- putstrn0(str, n, 0);
- }
- int
- print(char *fmt, ...)
- {
- int n;
- va_list arg;
- char buf[PRINTSIZE];
- va_start(arg, fmt);
- n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
- va_end(arg);
- putstrn(buf, n);
- return n;
- }
- /*
- * Want to interlock iprints to avoid interlaced output on
- * multiprocessor, but don't want to deadlock if one processor
- * dies during print and another has something important to say.
- * Make a good faith effort.
- */
- static Lock iprintlock;
- static int
- iprintcanlock(Lock *l)
- {
- int i;
- for(i=0; i<1000; i++){
- if(canlock(l))
- return 1;
- if(l->m == m)
- return 0;
- microdelay(100);
- }
- return 0;
- }
- int
- iprint(char *fmt, ...)
- {
- Mpl pl;
- int i, n, locked;
- va_list arg;
- char buf[PRINTSIZE];
- pl = splhi();
- va_start(arg, fmt);
- n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
- va_end(arg);
- locked = iprintcanlock(&iprintlock);
- for(i = 0; i < nconsdevs; i++)
- if((consdevs[i].flags&Ciprint) != 0){
- if(consdevs[i].q != nil)
- qiwrite(consdevs[i].q, buf, n);
- else
- consdevs[i].fn(buf, n);
- }
- if(locked)
- unlock(&iprintlock);
- splx(pl);
- return n;
- }
- #pragma profile 0
- void
- panic(char *fmt, ...)
- {
- int n;
- Mpl pl;
- va_list arg;
- char buf[PRINTSIZE];
- consdevs[1].q = nil; /* don't try to write to /dev/kprint */
- if(panicking)
- for(;;);
- panicking = 1;
- pl = splhi();
- seprint(buf, buf+sizeof buf, "panic: cpu%d: ", m->machno);
- va_start(arg, fmt);
- n = vseprint(buf+strlen(buf), buf+sizeof(buf), fmt, arg) - buf;
- va_end(arg);
- iprint("%s\n", buf);
- if(consdebug)
- (*consdebug)();
- splx(pl);
- prflush();
- buf[n] = '\n';
- putstrn(buf, n+1);
- dumpstack();
- delay(1000); /* give time to consoles */
- exit(1);
- }
- #pragma profile 1
- /* libmp at least contains a few calls to sysfatal; simulate with panic */
- void
- sysfatal(char *fmt, ...)
- {
- char err[256];
- va_list arg;
- va_start(arg, fmt);
- vseprint(err, err + sizeof err, fmt, arg);
- va_end(arg);
- panic("sysfatal: %s", err);
- }
- void
- _assert(char *fmt)
- {
- panic("assert failed at %#p: %s", getcallerpc(&fmt), fmt);
- }
- int
- pprint(char *fmt, ...)
- {
- int n;
- Chan *c;
- va_list arg;
- char buf[2*PRINTSIZE];
- if(up == nil || up->fgrp == nil)
- return 0;
- c = up->fgrp->fd[2];
- if(c==0 || (c->mode!=OWRITE && c->mode!=ORDWR))
- return 0;
- n = snprint(buf, sizeof buf, "%s %d: ", up->text, up->pid);
- va_start(arg, fmt);
- n = vseprint(buf+n, buf+sizeof(buf), fmt, arg) - buf;
- va_end(arg);
- if(waserror())
- return 0;
- c->dev->write(c, buf, n, c->offset);
- poperror();
- lock(c);
- c->offset += n;
- unlock(c);
- return n;
- }
- static void
- echo(char *buf, int n)
- {
- Mpl pl;
- static int ctrlt, pid;
- char *e, *p;
- if(n == 0)
- return;
- e = buf+n;
- for(p = buf; p < e; p++){
- switch(*p){
- case 0x10: /* ^P */
- if(cpuserver && !kbd.ctlpoff){
- active.exiting = 1;
- return;
- }
- break;
- case 0x14: /* ^T */
- ctrlt++;
- if(ctrlt > 2)
- ctrlt = 2;
- continue;
- }
- if(ctrlt != 2)
- continue;
- /* ^T escapes */
- ctrlt = 0;
- switch(*p){
- case 'S':
- pl = splhi();
- dumpstack();
- procdump();
- splx(pl);
- return;
- case 's':
- dumpstack();
- return;
- case 'x':
- ixsummary();
- mallocsummary();
- // memorysummary();
- pagersummary();
- return;
- case 'd':
- if(consdebug == nil)
- consdebug = rdb;
- else
- consdebug = nil;
- print("consdebug now %#p\n", consdebug);
- return;
- case 'D':
- if(consdebug == nil)
- consdebug = rdb;
- consdebug();
- return;
- case 'p':
- pl = spllo();
- procdump();
- splx(pl);
- return;
- case 'q':
- scheddump();
- return;
- case 'k':
- killbig("^t ^t k");
- return;
- case 'r':
- exit(0);
- return;
- }
- }
- if(kbdq != nil)
- qproduce(kbdq, buf, n);
- if(kbd.raw == 0)
- putstrn(buf, n);
- }
- /*
- * Called by a uart interrupt for console input.
- *
- * turn '\r' into '\n' before putting it into the queue.
- */
- int
- kbdcr2nl(Queue*, int ch)
- {
- char *next;
- ilock(&kbd.lockputc); /* just a mutex */
- if(ch == '\r' && !kbd.raw)
- ch = '\n';
- next = kbd.iw+1;
- if(next >= kbd.ie)
- next = kbd.istage;
- if(next != kbd.ir){
- *kbd.iw = ch;
- kbd.iw = next;
- }
- iunlock(&kbd.lockputc);
- return 0;
- }
- /*
- * Put character, possibly a rune, into read queue at interrupt time.
- * Called at interrupt time to process a character.
- */
- int
- kbdputc(Queue*, int ch)
- {
- int i, n;
- char buf[3];
- Rune r;
- char *next;
- if(kbd.ir == nil)
- return 0; /* in case we're not inited yet */
- ilock(&kbd.lockputc); /* just a mutex */
- r = ch;
- n = runetochar(buf, &r);
- for(i = 0; i < n; i++){
- next = kbd.iw+1;
- if(next >= kbd.ie)
- next = kbd.istage;
- if(next == kbd.ir)
- break;
- *kbd.iw = buf[i];
- kbd.iw = next;
- }
- iunlock(&kbd.lockputc);
- return 0;
- }
- /*
- * we save up input characters till clock time to reduce
- * per character interrupt overhead.
- */
- static void
- kbdputcclock(void)
- {
- char *iw;
- /* this amortizes cost of qproduce */
- if(kbd.iw != kbd.ir){
- iw = kbd.iw;
- if(iw < kbd.ir){
- echo(kbd.ir, kbd.ie-kbd.ir);
- kbd.ir = kbd.istage;
- }
- if(kbd.ir != iw){
- echo(kbd.ir, iw-kbd.ir);
- kbd.ir = iw;
- }
- }
- }
- enum{
- Qdir,
- Qbintime,
- Qcons,
- Qconsctl,
- Qcputime,
- Qdrivers,
- Qkmesg,
- Qkprint,
- Qhostdomain,
- Qhostowner,
- Qnull,
- Qosversion,
- Qpgrpid,
- Qpid,
- Qppid,
- Qrandom,
- Qreboot,
- Qswap,
- Qsysname,
- Qsysstat,
- Qtime,
- Quser,
- Qzero,
- Qdebug,
- };
- enum
- {
- VLNUMSIZE= 22,
- };
- static Dirtab consdir[]={
- ".", {Qdir, 0, QTDIR}, 0, DMDIR|0555,
- "bintime", {Qbintime}, 24, 0664,
- "cons", {Qcons}, 0, 0660,
- "consctl", {Qconsctl}, 0, 0220,
- "cputime", {Qcputime}, 6*NUMSIZE, 0444,
- "drivers", {Qdrivers}, 0, 0444,
- "hostdomain", {Qhostdomain}, DOMLEN, 0664,
- "hostowner", {Qhostowner}, 0, 0664,
- "kmesg", {Qkmesg}, 0, 0440,
- "kprint", {Qkprint, 0, QTEXCL}, 0, DMEXCL|0440,
- "null", {Qnull}, 0, 0666,
- "osversion", {Qosversion}, 0, 0444,
- "pgrpid", {Qpgrpid}, NUMSIZE, 0444,
- "pid", {Qpid}, NUMSIZE, 0444,
- "ppid", {Qppid}, NUMSIZE, 0444,
- "random", {Qrandom}, 0, 0444,
- "reboot", {Qreboot}, 0, 0664,
- "swap", {Qswap}, 0, 0664,
- "sysname", {Qsysname}, 0, 0664,
- "sysstat", {Qsysstat}, 0, 0666,
- "time", {Qtime}, NUMSIZE+3*VLNUMSIZE, 0664,
- "user", {Quser}, 0, 0666,
- "zero", {Qzero}, 0, 0444,
- "debug", {Qdebug}, 0, 0666,
- };
- int
- readnum(uint32_t off, char *buf, uint32_t n, uint32_t val, int size)
- {
- char tmp[64];
- snprint(tmp, sizeof(tmp), "%*lud", size-1, val);
- tmp[size-1] = ' ';
- if(off >= size)
- return 0;
- if(off+n > size)
- n = size-off;
- memmove(buf, tmp+off, n);
- return n;
- }
- int32_t
- readstr(int32_t offset, char *buf, int32_t n, char *str)
- {
- int32_t size;
- size = strlen(str);
- if(offset >= size)
- return 0;
- if(offset+n > size)
- n = size-offset;
- memmove(buf, str+offset, n);
- return n;
- }
- static void
- consinit(void)
- {
- todinit();
- randominit();
- /*
- * at 115200 baud, the 1024 char buffer takes 56 ms to process,
- * processing it every 22 ms should be fine
- */
- addclock0link(kbdputcclock, 22);
- kickkbdq();
- }
- static Chan*
- consattach(char *spec)
- {
- return devattach('c', spec);
- }
- static Walkqid*
- conswalk(Chan *c, Chan *nc, char **name, int nname)
- {
- return devwalk(c, nc, name,nname, consdir, nelem(consdir), devgen);
- }
- static int32_t
- consstat(Chan *c, uint8_t *dp, int32_t n)
- {
- return devstat(c, dp, n, consdir, nelem(consdir), devgen);
- }
- static Chan*
- consopen(Chan *c, int omode)
- {
- c->aux = nil;
- c = devopen(c, omode, consdir, nelem(consdir), devgen);
- switch((uint32_t)c->qid.path){
- case Qconsctl:
- incref(&kbd.ctl);
- break;
- case Qkprint:
- if(TAS(&kprintinuse) != 0){
- c->flag &= ~COPEN;
- error(Einuse);
- }
- if(kprintoq == nil){
- kprintoq = qopen(8*1024, Qcoalesce, 0, 0);
- if(kprintoq == nil){
- c->flag &= ~COPEN;
- error(Enomem);
- }
- qnoblock(kprintoq, 1);
- consdevs[1].q = kprintoq;
- }else
- qreopen(kprintoq);
- c->iounit = qiomaxatomic;
- break;
- }
- return c;
- }
- static void
- consclose(Chan *c)
- {
- switch((uint32_t)c->qid.path){
- /* last close of control file turns off raw */
- case Qconsctl:
- if(c->flag&COPEN){
- if(decref(&kbd.ctl) == 0)
- kbd.raw = 0;
- }
- break;
- /* close of kprint allows other opens */
- case Qkprint:
- if(c->flag & COPEN){
- kprintinuse = 0;
- qhangup(kprintoq, nil);
- }
- break;
- }
- }
- static int32_t
- consread(Chan *c, void *buf, int32_t n, int64_t off)
- {
- uint32_t l;
- Mach *mp;
- char *b, *bp, ch, *s, *e;
- char tmp[512]; /* Qswap is 381 bytes at clu */
- int i, k, id, send;
- int32_t offset;
- if(n <= 0)
- return n;
- offset = off;
- switch((uint32_t)c->qid.path){
- case Qdir:
- return devdirread(c, buf, n, consdir, nelem(consdir), devgen);
- case Qcons:
- qlock(&kbd);
- if(waserror()) {
- qunlock(&kbd);
- nexterror();
- }
- while(!qcanread(lineq)){
- if(qread(kbdq, &ch, 1) == 0)
- continue;
- send = 0;
- if(ch == 0){
- /* flush output on rawoff -> rawon */
- if(kbd.x > 0)
- send = !qcanread(kbdq);
- }else if(kbd.raw){
- kbd.line[kbd.x++] = ch;
- send = !qcanread(kbdq);
- }else{
- switch(ch){
- case '\b':
- if(kbd.x > 0)
- kbd.x--;
- break;
- case 0x15: /* ^U */
- kbd.x = 0;
- break;
- case '\n':
- case 0x04: /* ^D */
- send = 1;
- default:
- if(ch != 0x04)
- kbd.line[kbd.x++] = ch;
- break;
- }
- }
- if(send || kbd.x == sizeof kbd.line){
- qwrite(lineq, kbd.line, kbd.x);
- kbd.x = 0;
- }
- }
- n = qread(lineq, buf, n);
- qunlock(&kbd);
- poperror();
- return n;
- case Qcputime:
- k = offset;
- if(k >= 6*NUMSIZE)
- return 0;
- if(k+n > 6*NUMSIZE)
- n = 6*NUMSIZE - k;
- /* easiest to format in a separate buffer and copy out */
- for(i=0; i<6 && NUMSIZE*i<k+n; i++){
- l = up->time[i];
- if(i == TReal)
- l = sys->ticks - l;
- l = TK2MS(l);
- readnum(0, tmp+NUMSIZE*i, NUMSIZE, l, NUMSIZE);
- }
- memmove(buf, tmp+k, n);
- return n;
- case Qkmesg:
- /*
- * This is unlocked to avoid tying up a process
- * that's writing to the buffer. kmesg.n never
- * gets smaller, so worst case the reader will
- * see a slurred buffer.
- */
- if(off >= kmesg.n)
- n = 0;
- else{
- if(off+n > kmesg.n)
- n = kmesg.n - off;
- memmove(buf, kmesg.buf+off, n);
- }
- return n;
- case Qkprint:
- return qread(kprintoq, buf, n);
- case Qpgrpid:
- return readnum(offset, buf, n, up->pgrp->pgrpid, NUMSIZE);
- case Qpid:
- return readnum(offset, buf, n, up->pid, NUMSIZE);
- case Qppid:
- return readnum(offset, buf, n, up->parentpid, NUMSIZE);
- case Qtime:
- return readtime(offset, buf, n);
- case Qbintime:
- return readbintime(buf, n);
- case Qhostowner:
- return readstr(offset, buf, n, eve);
- case Qhostdomain:
- return readstr(offset, buf, n, hostdomain);
- case Quser:
- return readstr(offset, buf, n, up->user);
- case Qnull:
- return 0;
- case Qsysstat:
- n = MACHMAX*(NUMSIZE*11+2+1);
- b = smalloc(n + 1); /* +1 for NUL */
- bp = b;
- e = bp + n;
- for(id = 0; id < MACHMAX; id++)
- if((mp = sys->machptr[id]) != nil && mp->online){
- readnum(0, bp, NUMSIZE, mp->machno, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, mp->cs, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, mp->intr, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, mp->syscall, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, mp->pfault, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, mp->tlbfault, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, mp->tlbpurge, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, sys->load, NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE,
- (mp->perf.avg_inidle*100)/mp->perf.period,
- NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE,
- (mp->perf.avg_inintr*100)/mp->perf.period,
- NUMSIZE);
- bp += NUMSIZE;
- readnum(0, bp, NUMSIZE, 0, NUMSIZE); /* sched # */
- bp += NUMSIZE;
- bp = strecpy(bp, e, rolename[mp->nixtype]);
- *bp++ = '\n';
- }
- if(waserror()){
- free(b);
- nexterror();
- }
- n = readstr(offset, buf, n, b);
- free(b);
- poperror();
- return n;
- case Qswap:
- tmp[0] = 0;
- s = seprintpagestats(tmp, tmp + sizeof tmp);
- s = seprintphysstats(s, tmp + sizeof tmp);
- b = buf;
- l = s - tmp;
- i = readstr(offset, b, l, tmp);
- b += i;
- n -= i;
- if(offset > l)
- offset -= l;
- else
- offset = 0;
- return i + mallocreadsummary(c, b, n, offset);
- case Qsysname:
- if(sysname == nil)
- return 0;
- return readstr(offset, buf, n, sysname);
- case Qrandom:
- return randomread(buf, n);
- case Qdrivers:
- return devtabread(c, buf, n, off);
- case Qzero:
- memset(buf, 0, n);
- return n;
- case Qosversion:
- snprint(tmp, sizeof tmp, "2000");
- n = readstr(offset, buf, n, tmp);
- return n;
- case Qdebug:
- s = seprint(tmp, tmp + sizeof tmp, "locks %uld\n", lockstats.locks);
- s = seprint(s, tmp + sizeof tmp, "glare %uld\n", lockstats.glare);
- s = seprint(s, tmp + sizeof tmp, "inglare %uld\n", lockstats.inglare);
- s = seprint(s, tmp + sizeof tmp, "qlock %uld\n", qlockstats.qlock);
- seprint(s, tmp + sizeof tmp, "qlockq %uld\n", qlockstats.qlockq);
- return readstr(offset, buf, n, tmp);
- break;
- default:
- print("consread %#llux\n", c->qid.path);
- error(Egreg);
- }
- return -1; /* never reached */
- }
- static int32_t
- conswrite(Chan *c, void *va, int32_t n, int64_t off)
- {
- char buf[256], ch;
- int32_t l, bp;
- char *a;
- Mach *mp;
- int i;
- uint32_t offset;
- Cmdbuf *cb;
- Cmdtab *ct;
- a = va;
- offset = off;
- switch((uint32_t)c->qid.path){
- case Qcons:
- /*
- * Can't page fault in putstrn, so copy the data locally.
- */
- l = n;
- while(l > 0){
- bp = l;
- if(bp > sizeof buf)
- bp = sizeof buf;
- memmove(buf, a, bp);
- putstrn0(buf, bp, 1);
- a += bp;
- l -= bp;
- }
- break;
- case Qconsctl:
- if(n >= sizeof(buf))
- n = sizeof(buf)-1;
- strncpy(buf, a, n);
- buf[n] = 0;
- for(a = buf; a;){
- if(strncmp(a, "rawon", 5) == 0){
- kbd.raw = 1;
- /* clumsy hack - wake up reader */
- ch = 0;
- qwrite(kbdq, &ch, 1);
- }
- else if(strncmp(a, "rawoff", 6) == 0)
- kbd.raw = 0;
- else if(strncmp(a, "ctlpon", 6) == 0)
- kbd.ctlpoff = 0;
- else if(strncmp(a, "ctlpoff", 7) == 0)
- kbd.ctlpoff = 1;
- if(a = strchr(a, ' '))
- a++;
- }
- break;
- case Qtime:
- if(!iseve())
- error(Eperm);
- return writetime(a, n);
- case Qbintime:
- if(!iseve())
- error(Eperm);
- return writebintime(a, n);
- case Qhostowner:
- return hostownerwrite(a, n);
- case Qhostdomain:
- return hostdomainwrite(a, n);
- case Quser:
- return userwrite(a, n);
- case Qnull:
- break;
- case Qreboot:
- if(!iseve())
- error(Eperm);
- cb = parsecmd(a, n);
- if(waserror()) {
- free(cb);
- nexterror();
- }
- ct = lookupcmd(cb, rebootmsg, nelem(rebootmsg));
- switch(ct->index) {
- case CMhalt:
- reboot(nil, 0, 0);
- break;
- case CMreboot:
- rebootcmd(cb->nf-1, cb->f+1);
- break;
- case CMpanic:
- *(uint32_t*)0=0;
- panic("/dev/reboot");
- }
- poperror();
- free(cb);
- break;
- case Qsysstat:
- for(i = 0; i < MACHMAX; i++)
- if((mp = sys->machptr[i]) != nil && mp->online){
- mp = sys->machptr[i];
- mp->cs = 0;
- mp->intr = 0;
- mp->syscall = 0;
- mp->pfault = 0;
- mp->tlbfault = 0; /* not updated */
- mp->tlbpurge = 0; /* # mmuflushtlb */
- }
- break;
- case Qswap:
- if(n >= sizeof buf)
- error(Egreg);
- memmove(buf, va, n); /* so we can NUL-terminate */
- buf[n] = 0;
- if(!iseve())
- error(Eperm);
- if(buf[0]<'0' || '9'<buf[0])
- error(Ebadarg);
- if(strncmp(buf, "start", 5) == 0){
- print("request to start pager ignored\n");
- break;
- }
- break;
- case Qsysname:
- if(offset != 0)
- error(Ebadarg);
- if(n <= 0 || n >= sizeof buf)
- error(Ebadarg);
- strncpy(buf, a, n);
- buf[n] = 0;
- if(buf[n-1] == '\n')
- buf[n-1] = 0;
- kstrdup(&sysname, buf);
- break;
- case Qdebug:
- if(n >= sizeof(buf))
- n = sizeof(buf)-1;
- strncpy(buf, a, n);
- buf[n] = 0;
- if(n > 0 && buf[n-1] == '\n')
- buf[n-1] = 0;
- error(Ebadctl);
- break;
- default:
- print("conswrite: %#llux\n", c->qid.path);
- error(Egreg);
- }
- return n;
- }
- Dev consdevtab = {
- 'c',
- "cons",
- devreset,
- consinit,
- devshutdown,
- consattach,
- conswalk,
- consstat,
- consopen,
- devcreate,
- consclose,
- consread,
- devbread,
- conswrite,
- devbwrite,
- devremove,
- devwstat,
- };
- static uint32_t randn;
- static void
- seedrand(void)
- {
- if(!waserror()){
- randomread((void*)&randn, sizeof(randn));
- poperror();
- }
- }
- int
- nrand(int n)
- {
- if(randn == 0)
- seedrand();
- randn = randn*1103515245 + 12345 + sys->ticks;
- return (randn>>16) % n;
- }
- int
- rand(void)
- {
- nrand(1);
- return randn;
- }
- static uint64_t uvorder = 0x0001020304050607ULL;
- static uint8_t*
- le2vlong(int64_t *to, uint8_t *f)
- {
- uint8_t *t, *o;
- int i;
- t = (uint8_t*)to;
- o = (uint8_t*)&uvorder;
- for(i = 0; i < sizeof(int64_t); i++)
- t[o[i]] = f[i];
- return f+sizeof(int64_t);
- }
- static uint8_t*
- vlong2le(uint8_t *t, int64_t from)
- {
- uint8_t *f, *o;
- int i;
- f = (uint8_t*)&from;
- o = (uint8_t*)&uvorder;
- for(i = 0; i < sizeof(int64_t); i++)
- t[i] = f[o[i]];
- return t+sizeof(int64_t);
- }
- static int32_t order = 0x00010203;
- static uint8_t*
- le2long(int32_t *to, uint8_t *f)
- {
- uint8_t *t, *o;
- int i;
- t = (uint8_t*)to;
- o = (uint8_t*)ℴ
- for(i = 0; i < sizeof(int32_t); i++)
- t[o[i]] = f[i];
- return f+sizeof(int32_t);
- }
- static uint8_t*
- long2le(uint8_t *t, int32_t from)
- {
- uint8_t *f, *o;
- int i;
- f = (uint8_t*)&from;
- o = (uint8_t*)ℴ
- for(i = 0; i < sizeof(int32_t); i++)
- t[i] = f[o[i]];
- return t+sizeof(int32_t);
- }
- char *Ebadtimectl = "bad time control";
- /*
- * like the old #c/time but with added info. Return
- *
- * secs nanosecs fastticks fasthz
- */
- static int
- readtime(uint32_t off, char *buf, int n)
- {
- int64_t nsec, ticks;
- int32_t sec;
- char str[7*NUMSIZE];
- nsec = todget(&ticks);
- if(fasthz == 0LL)
- fastticks((uint64_t*)&fasthz);
- sec = nsec/1000000000ULL;
- snprint(str, sizeof(str), "%*lud %*llud %*llud %*llud ",
- NUMSIZE-1, sec,
- VLNUMSIZE-1, nsec,
- VLNUMSIZE-1, ticks,
- VLNUMSIZE-1, fasthz);
- return readstr(off, buf, n, str);
- }
- /*
- * set the time in seconds
- */
- static int
- writetime(char *buf, int n)
- {
- char b[13];
- int32_t i;
- int64_t now;
- if(n >= sizeof(b))
- error(Ebadtimectl);
- strncpy(b, buf, n);
- b[n] = 0;
- i = strtol(b, 0, 0);
- if(i <= 0)
- error(Ebadtimectl);
- now = i*1000000000LL;
- todset(now, 0, 0);
- return n;
- }
- /*
- * read binary time info. all numbers are little endian.
- * ticks and nsec are syncronized.
- */
- static int
- readbintime(char *buf, int n)
- {
- int i;
- int64_t nsec, ticks;
- uint8_t *b = (uint8_t*)buf;
- i = 0;
- if(fasthz == 0LL)
- fastticks((uint64_t*)&fasthz);
- nsec = todget(&ticks);
- if(n >= 3*sizeof(uint64_t)){
- vlong2le(b+2*sizeof(uint64_t), fasthz);
- i += sizeof(uint64_t);
- }
- if(n >= 2*sizeof(uint64_t)){
- vlong2le(b+sizeof(uint64_t), ticks);
- i += sizeof(uint64_t);
- }
- if(n >= 8){
- vlong2le(b, nsec);
- i += sizeof(int64_t);
- }
- return i;
- }
- /*
- * set any of the following
- * - time in nsec
- * - nsec trim applied over some seconds
- * - clock frequency
- */
- static int
- writebintime(char *buf, int n)
- {
- uint8_t *p;
- int64_t delta;
- int32_t period;
- n--;
- p = (uint8_t*)buf + 1;
- switch(*buf){
- case 'n':
- if(n < sizeof(int64_t))
- error(Ebadtimectl);
- le2vlong(&delta, p);
- todset(delta, 0, 0);
- break;
- case 'd':
- if(n < sizeof(int64_t)+sizeof(int32_t))
- error(Ebadtimectl);
- p = le2vlong(&delta, p);
- le2long(&period, p);
- todset(-1, delta, period);
- break;
- case 'f':
- if(n < sizeof(uint64_t))
- error(Ebadtimectl);
- le2vlong(&fasthz, p);
- todsetfreq(fasthz);
- break;
- }
- return n;
- }
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