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/*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of
* this archive for more details.
*
* Copyright (C) 2006 Christian Limpach
* Copyright (C) 2006 XenSource Ltd.
*
*/
#include "vl.h"
#include "block_int.h"
static struct xs_handle *xsh = NULL;
static char *hd_filename[MAX_DISKS];
static QEMUTimer *insert_timer = NULL;
static int pasprintf(char **buf, const char *fmt, ...)
{
va_list ap;
int ret = 0;
if (*buf)
free(*buf);
va_start(ap, fmt);
if (vasprintf(buf, fmt, ap) == -1) {
buf = NULL;
ret = -1;
}
va_end(ap);
return ret;
}
static void insert_media(void *opaque)
{
int i;
for (i = 0; i < MAX_DISKS; i++) {
if (hd_filename[i]) {
do_change(bs_table[i]->device_name, hd_filename[i]);
free(hd_filename[i]);
hd_filename[i] = NULL;
}
}
}
void xenstore_check_new_media_present(int timeout)
{
if (insert_timer == NULL)
insert_timer = qemu_new_timer(rt_clock, insert_media, NULL);
qemu_mod_timer(insert_timer, qemu_get_clock(rt_clock) + timeout);
}
void xenstore_parse_domain_config(int domid)
{
char **e = NULL;
char *buf = NULL, *path;
char *bpath = NULL, *dev = NULL, *params = NULL, *type = NULL;
int i;
unsigned int len, num, hd_index;
for(i = 0; i < MAX_DISKS; i++)
hd_filename[i] = NULL;
xsh = xs_daemon_open();
if (xsh == NULL) {
fprintf(logfile, "Could not contact xenstore for domain config\n");
return;
}
path = xs_get_domain_path(xsh, domid);
if (path == NULL) {
fprintf(logfile, "xs_get_domain_path() error\n");
goto out;
}
if (pasprintf(&buf, "%s/device/vbd", path) == -1)
goto out;
e = xs_directory(xsh, XBT_NULL, buf, &num);
if (e == NULL)
goto out;
for (i = 0; i < num; i++) {
/* read the backend path */
if (pasprintf(&buf, "%s/device/vbd/%s/backend", path, e[i]) == -1)
continue;
free(bpath);
bpath = xs_read(xsh, XBT_NULL, buf, &len);
if (bpath == NULL)
continue;
/* read the name of the device */
if (pasprintf(&buf, "%s/dev", bpath) == -1)
continue;
free(dev);
dev = xs_read(xsh, XBT_NULL, buf, &len);
if (dev == NULL)
continue;
if (strncmp(dev, "hd", 2) || strlen(dev) != 3)
continue;
hd_index = dev[2] - 'a';
if (hd_index > MAX_DISKS)
continue;
/* read the type of the device */
if (pasprintf(&buf, "%s/device/vbd/%s/device-type", path, e[i]) == -1)
continue;
free(type);
type = xs_read(xsh, XBT_NULL, buf, &len);
/* read params to get the patch of the image -- read it last
* so that we have its path in buf when setting up the
* watch */
if (pasprintf(&buf, "%s/params", bpath) == -1)
continue;
free(params);
params = xs_read(xsh, XBT_NULL, buf, &len);
if (params == NULL)
continue;
if (params[0]) {
hd_filename[hd_index] = params; /* strdup() */
params = NULL; /* don't free params on re-use */
}
bs_table[hd_index] = bdrv_new(dev);
/* check if it is a cdrom */
if (type && !strcmp(type, "cdrom")) {
bdrv_set_type_hint(bs_table[hd_index], BDRV_TYPE_CDROM);
xs_watch(xsh, buf, dev);
}
if (hd_filename[hd_index]) {
if (bdrv_open(bs_table[hd_index], hd_filename[hd_index],
0 /* snapshot */) < 0)
fprintf(stderr, "qemu: could not open hard disk image '%s'\n",
hd_filename[hd_index]);
}
}
out:
free(type);
free(params);
free(dev);
free(bpath);
free(buf);
free(path);
free(e);
return;
}
int xenstore_fd(void)
{
if (xsh)
return xs_fileno(xsh);
return -1;
}
void xenstore_process_event(void *opaque)
{
char **vec, *image = NULL;
unsigned int len, num, hd_index;
vec = xs_read_watch(xsh, &num);
if (!vec)
return;
if (strncmp(vec[XS_WATCH_TOKEN], "hd", 2) ||
strlen(vec[XS_WATCH_TOKEN]) != 3)
goto out;
hd_index = vec[XS_WATCH_TOKEN][2] - 'a';
image = xs_read(xsh, XBT_NULL, vec[XS_WATCH_PATH], &len);
if (image == NULL || !strcmp(image, bs_table[hd_index]->filename))
goto out; /* gone or identical */
do_eject(0, vec[XS_WATCH_TOKEN]);
bs_table[hd_index]->filename[0] = 0;
if (hd_filename[hd_index]) {
free(hd_filename[hd_index]);
hd_filename[hd_index] = NULL;
}
if (image[0]) {
hd_filename[hd_index] = strdup(image);
xenstore_check_new_media_present(5000);
}
out:
free(image);
free(vec);
}
void xenstore_write_vncport(int display)
{
char *buf = NULL, *path;
char *portstr = NULL;
if (xsh == NULL)
return;
path = xs_get_domain_path(xsh, domid);
if (path == NULL) {
fprintf(logfile, "xs_get_domain_path() error\n");
goto out;
}
if (pasprintf(&buf, "%s/console/vnc-port", path) == -1)
goto out;
if (pasprintf(&portstr, "%d", 5900 + display) == -1)
goto out;
if (xs_write(xsh, XBT_NULL, buf, portstr, strlen(portstr)) == 0)
fprintf(logfile, "xs_write() vncport failed\n");
out:
free(portstr);
free(buf);
}
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