Author: grehan
Date: Wed Nov 27 00:21:37 2013
New Revision: 258668
URL: http://svnweb.freebsd.org/changeset/base/258668
Log:
Allow bhyve and bhyveload to attach to tty devices.
bhyveload: introduce the -c <device> parameter
to select a tty for output (or "stdio")
bhyve: allow the puc and lpc-com backends to
accept a tty in addition to "stdio"
When used in conjunction with the null-modem device,
nmdm(4), this allows attach/detach to the guest console
and multiple concurrent serial ports. kgdb on a serial
port is now functional.
Reviewed by: neel
Requested by: Almost everyone that has used bhyve
MFC after: 10.0
Modified:
head/usr.sbin/bhyve/uart_emul.c
head/usr.sbin/bhyveload/bhyveload.8
head/usr.sbin/bhyveload/bhyveload.c
Modified: head/usr.sbin/bhyve/uart_emul.c
==============================================================================
--- head/usr.sbin/bhyve/uart_emul.c Tue Nov 26 22:41:40 2013
(r258667)
+++ head/usr.sbin/bhyve/uart_emul.c Wed Nov 27 00:21:37 2013
(r258668)
@@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
+#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
#include <stdbool.h>
@@ -67,6 +68,7 @@ __FBSDID("$FreeBSD$");
#define FIFOSZ 16
static bool uart_stdio; /* stdio in use for i/o */
+static struct termios tio_stdio_orig;
static struct {
int baseaddr;
@@ -87,6 +89,12 @@ struct fifo {
int size; /* size of the fifo */
};
+struct ttyfd {
+ bool opened;
+ int fd; /* tty device file descriptor */
+ struct termios tio_orig, tio_new; /* I/O Terminals */
+};
+
struct uart_softc {
pthread_mutex_t mtx; /* protects all softc elements */
uint8_t data; /* Data register (R/W) */
@@ -103,8 +111,7 @@ struct uart_softc {
struct fifo rxfifo;
- bool opened;
- bool stdio;
+ struct ttyfd tty;
bool thre_int_pending; /* THRE interrupt pending */
void *arg;
@@ -114,38 +121,41 @@ struct uart_softc {
static void uart_drain(int fd, enum ev_type ev, void *arg);
-static struct termios tio_orig, tio_new; /* I/O Terminals */
-
static void
ttyclose(void)
{
- tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig);
+ tcsetattr(STDIN_FILENO, TCSANOW, &tio_stdio_orig);
}
static void
-ttyopen(void)
+ttyopen(struct ttyfd *tf)
{
- tcgetattr(STDIN_FILENO, &tio_orig);
+ tcgetattr(tf->fd, &tf->tio_orig);
- cfmakeraw(&tio_new);
- tcsetattr(STDIN_FILENO, TCSANOW, &tio_new);
+ tf->tio_new = tf->tio_orig;
+ cfmakeraw(&tf->tio_new);
+ tf->tio_new.c_cflag |= CLOCAL;
+ tcsetattr(tf->fd, TCSANOW, &tf->tio_new);
- atexit(ttyclose);
+ if (tf->fd == STDIN_FILENO) {
+ tio_stdio_orig = tf->tio_orig;
+ atexit(ttyclose);
+ }
}
static bool
-tty_char_available(void)
+tty_char_available(struct ttyfd *tf)
{
fd_set rfds;
struct timeval tv;
FD_ZERO(&rfds);
- FD_SET(STDIN_FILENO, &rfds);
+ FD_SET(tf->fd, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
- if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0 ) {
+ if (select(tf->fd + 1, &rfds, NULL, NULL, &tv) > 0 ) {
return (true);
} else {
return (false);
@@ -153,12 +163,12 @@ tty_char_available(void)
}
static int
-ttyread(void)
+ttyread(struct ttyfd *tf)
{
char rb;
- if (tty_char_available()) {
- read(STDIN_FILENO, &rb, 1);
+ if (tty_char_available(tf)) {
+ read(tf->fd, &rb, 1);
return (rb & 0xff);
} else {
return (-1);
@@ -166,10 +176,10 @@ ttyread(void)
}
static void
-ttywrite(unsigned char wb)
+ttywrite(struct ttyfd *tf, unsigned char wb)
{
- (void)write(STDIN_FILENO, &wb, 1);
+ (void)write(tf->fd, &wb, 1);
}
static void
@@ -226,10 +236,8 @@ uart_opentty(struct uart_softc *sc)
{
struct mevent *mev;
- assert(!sc->opened && sc->stdio);
-
- ttyopen();
- mev = mevent_add(STDIN_FILENO, EVF_READ, uart_drain, sc);
+ ttyopen(&sc->tty);
+ mev = mevent_add(sc->tty.fd, EVF_READ, uart_drain, sc);
assert(mev);
}
@@ -294,7 +302,7 @@ uart_drain(int fd, enum ev_type ev, void
sc = arg;
- assert(fd == STDIN_FILENO);
+ assert(fd == sc->tty.fd);
assert(ev == EVF_READ);
/*
@@ -305,10 +313,10 @@ uart_drain(int fd, enum ev_type ev, void
pthread_mutex_lock(&sc->mtx);
if ((sc->mcr & MCR_LOOPBACK) != 0) {
- (void) ttyread();
+ (void) ttyread(&sc->tty);
} else {
while (fifo_available(&sc->rxfifo) &&
- ((ch = ttyread()) != -1)) {
+ ((ch = ttyread(&sc->tty)) != -1)) {
fifo_putchar(&sc->rxfifo, ch);
}
uart_toggle_intr(sc);
@@ -323,12 +331,6 @@ uart_write(struct uart_softc *sc, int of
int fifosz;
uint8_t msr;
- /* Open terminal */
- if (!sc->opened && sc->stdio) {
- uart_opentty(sc);
- sc->opened = true;
- }
-
pthread_mutex_lock(&sc->mtx);
/*
@@ -351,8 +353,8 @@ uart_write(struct uart_softc *sc, int of
if (sc->mcr & MCR_LOOPBACK) {
if (fifo_putchar(&sc->rxfifo, value) != 0)
sc->lsr |= LSR_OE;
- } else if (sc->stdio) {
- ttywrite(value);
+ } else if (sc->tty.opened) {
+ ttywrite(&sc->tty, value);
} /* else drop on floor */
sc->thre_int_pending = true;
break;
@@ -459,12 +461,6 @@ uart_read(struct uart_softc *sc, int off
{
uint8_t iir, intr_reason, reg;
- /* Open terminal */
- if (!sc->opened && sc->stdio) {
- uart_opentty(sc);
- sc->opened = true;
- }
-
pthread_mutex_lock(&sc->mtx);
/*
@@ -581,19 +577,47 @@ uart_init(uart_intr_func_t intr_assert,
return (sc);
}
+static int
+uart_tty_backend(struct uart_softc *sc, const char *opts)
+{
+ int fd;
+ int retval;
+
+ retval = -1;
+
+ fd = open(opts, O_RDWR);
+ if (fd > 0 && isatty(fd)) {
+ sc->tty.fd = fd;
+ sc->tty.opened = true;
+ retval = 0;
+ }
+
+ return (retval);
+}
+
int
uart_set_backend(struct uart_softc *sc, const char *opts)
{
- /*
- * XXX one stdio backend supported at this time.
- */
+ int retval;
+
+ retval = -1;
+
if (opts == NULL)
return (0);
- if (strcmp("stdio", opts) == 0 && !uart_stdio) {
- sc->stdio = true;
- uart_stdio = true;
- return (0);
- } else
- return (-1);
+ if (strcmp("stdio", opts) == 0) {
+ if (!uart_stdio) {
+ sc->tty.fd = STDIN_FILENO;
+ sc->tty.opened = true;
+ uart_stdio = true;
+ retval = 0;
+ }
+ } else if (uart_tty_backend(sc, opts) == 0) {
+ retval = 0;
+ }
+
+ if (retval == 0)
+ uart_opentty(sc);
+
+ return (retval);
}
Modified: head/usr.sbin/bhyveload/bhyveload.8
==============================================================================
--- head/usr.sbin/bhyveload/bhyveload.8 Tue Nov 26 22:41:40 2013
(r258667)
+++ head/usr.sbin/bhyveload/bhyveload.8 Wed Nov 27 00:21:37 2013
(r258668)
@@ -39,6 +39,7 @@ guest inside a bhyve virtual machine
.Op Fl d Ar disk-path
.Op Fl h Ar host-path
.Op Fl e Ar name=value
+.Op Fl c Ar cons-dev
.Ar vmname
.Sh DESCRIPTION
.Nm
@@ -100,6 +101,16 @@ to
.Pp
The option may be used more than once to set more than one environment
variable.
+.It Fl c Ar cons-dev
+.Ar cons-dev
+is a
+.Xr tty 4
+device to use for
+.Nm
+terminal I/O.
+.Pp
+The text string "stdio" is also accepted and selects the use of
+unbuffered standard I/O. This is the default value.
.El
.Sh EXAMPLES
To create a virtual machine named
@@ -109,10 +120,23 @@ that boots off the ISO image
and has 1GB memory allocated to it:
.Pp
.Dl "bhyveload -m 1G -d /freebsd/release.iso freebsd-vm"
+.Pp
+To create a virtual machine named
+.Ar test-vm
+with 256MB of memory allocated, the guest root filesystem under the host
+directory
+.Pa /user/images/test
+and terminal I/O sent to the
+.Xr nmdm 4
+device
+.Pa /dev/nmdm1B
+.Pp
+.Dl "bhyveload -m 256MB -h /usr/images/test -c /dev/nmdm1B test-vm
.Sh SEE ALSO
.Xr bhyve 4 ,
.Xr bhyve 8 ,
.Xr loader 8 ,
+.Xr nmdm 4,
.Xr vmm 4
.Sh HISTORY
.Nm
Modified: head/usr.sbin/bhyveload/bhyveload.c
==============================================================================
--- head/usr.sbin/bhyveload/bhyveload.c Tue Nov 26 22:41:40 2013
(r258667)
+++ head/usr.sbin/bhyveload/bhyveload.c Wed Nov 27 00:21:37 2013
(r258668)
@@ -91,6 +91,7 @@ __FBSDID("$FreeBSD$");
static char *host_base = "/";
static struct termios term, oldterm;
static int disk_fd = -1;
+static int consin_fd, consout_fd;
static char *vmname, *progname;
static struct vmctx *ctx;
@@ -108,7 +109,7 @@ cb_putc(void *arg, int ch)
{
char c = ch;
- write(1, &c, 1);
+ (void) write(consout_fd, &c, 1);
}
static int
@@ -116,7 +117,7 @@ cb_getc(void *arg)
{
char c;
- if (read(0, &c, 1) == 1)
+ if (read(consin_fd, &c, 1) == 1)
return (c);
return (-1);
}
@@ -126,7 +127,7 @@ cb_poll(void *arg)
{
int n;
- if (ioctl(0, FIONREAD, &n) >= 0)
+ if (ioctl(consin_fd, FIONREAD, &n) >= 0)
return (n > 0);
return (0);
}
@@ -488,7 +489,7 @@ static void
cb_exit(void *arg, int v)
{
- tcsetattr(0, TCSAFLUSH, &oldterm);
+ tcsetattr(consout_fd, TCSAFLUSH, &oldterm);
exit(v);
}
@@ -564,13 +565,45 @@ static struct loader_callbacks cb = {
.getenv = cb_getenv,
};
+static int
+altcons_open(char *path)
+{
+ struct stat sb;
+ int err;
+ int fd;
+
+ /*
+ * Allow stdio to be passed in so that the same string
+ * can be used for the bhyveload console and bhyve com-port
+ * parameters
+ */
+ if (!strcmp(path, "stdio"))
+ return (0);
+
+ err = stat(path, &sb);
+ if (err == 0) {
+ if (!S_ISCHR(sb.st_mode))
+ err = ENOTSUP;
+ else {
+ fd = open(path, O_RDWR | O_NONBLOCK);
+ if (fd < 0)
+ err = errno;
+ else
+ consin_fd = consout_fd = fd;
+ }
+ }
+
+ return (err);
+}
+
static void
usage(void)
{
fprintf(stderr,
"usage: %s [-m mem-size] [-d <disk-path>] [-h <host-path>]\n"
- " %*s [-e <name=value>] <vmname>\n", progname,
+ " %*s [-e <name=value>] [-c <console-device>] <vmname>\n",
+ progname,
(int)strlen(progname), "");
exit(1);
}
@@ -589,8 +622,16 @@ main(int argc, char** argv)
mem_size = 256 * MB;
disk_image = NULL;
- while ((opt = getopt(argc, argv, "d:e:h:m:")) != -1) {
+ consin_fd = STDIN_FILENO;
+ consout_fd = STDOUT_FILENO;
+
+ while ((opt = getopt(argc, argv, "c:d:e:h:m:")) != -1) {
switch (opt) {
+ case 'c':
+ error = altcons_open(optarg);
+ if (error != 0)
+ errx(EX_USAGE, "Could not open '%s'", optarg);
+ break;
case 'd':
disk_image = optarg;
break;
@@ -640,11 +681,13 @@ main(int argc, char** argv)
exit(1);
}
- tcgetattr(0, &term);
+ tcgetattr(consout_fd, &term);
oldterm = term;
- term.c_lflag &= ~(ICANON|ECHO);
- term.c_iflag &= ~ICRNL;
- tcsetattr(0, TCSAFLUSH, &term);
+ cfmakeraw(&term);
+ term.c_cflag |= CLOCAL;
+
+ tcsetattr(consout_fd, TCSAFLUSH, &term);
+
h = dlopen("/boot/userboot.so", RTLD_LOCAL);
if (!h) {
printf("%s\n", dlerror());
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