#define UNIX_PATH_MAX 108
/* Also in guestfsd.c */
-#define GUESTFWD_PORT 6666
-//#define GUESTFWD_ADDR "10.0.2.4"
+#define GUESTFWD_ADDR "10.0.2.4"
+#define GUESTFWD_PORT "6666"
/* GuestFS handle and connection. */
enum state { CONFIG, LAUNCHING, READY, BUSY, NO_HANDLE };
}
if (r == 0) { /* Child (qemu). */
- char vmchannel[256];
- char append[256];
- char memsize_str[256];
+ char buf[256];
+ const char *vmchannel = NULL;
/* Set up the full command line. Do this in the subprocess so we
* don't need to worry about cleaning up.
*/
g->cmdline[0] = g->qemu;
-#define LINUX_CMDLINE \
- "panic=1 " /* force kernel to panic if daemon exits */ \
- "console=ttyS0 " /* serial console */ \
- "udevtimeout=300 " /* good for very slow systems (RHBZ#480319) */ \
- "noapic " /* workaround for RHBZ#502058 - ok if not SMP */ \
- "acpi=off " /* we don't need ACPI, turn it off */ \
- "cgroup_disable=memory " /* saves us about 5 MB of RAM */
-
- /* Linux kernel command line. */
- snprintf (append, sizeof append,
- LINUX_CMDLINE
- "%s" /* (selinux) */
- "%s" /* (verbose) */
- "%s", /* (append) */
- g->selinux ? "selinux=1 enforcing=0 " : "selinux=0 ",
- g->verbose ? "guestfs_verbose=1 " : " ",
- g->append ? g->append : "");
-
- snprintf (memsize_str, sizeof memsize_str, "%d", g->memsize);
-
+ snprintf (buf, sizeof buf, "%d", g->memsize);
add_cmdline (g, "-m");
- add_cmdline (g, memsize_str);
+ add_cmdline (g, buf);
+
add_cmdline (g, "-no-reboot"); /* Force exit instead of reboot on panic */
- add_cmdline (g, "-kernel");
- add_cmdline (g, (char *) kernel);
- add_cmdline (g, "-initrd");
- add_cmdline (g, (char *) initrd);
- add_cmdline (g, "-append");
- add_cmdline (g, append);
add_cmdline (g, "-nographic");
add_cmdline (g, "-serial");
add_cmdline (g, "stdio");
-#if 0
- /* Doesn't work. See:
- * http://lists.gnu.org/archive/html/qemu-devel/2009-07/threads.html
- * Subject "guestfwd option doesn't allow supplementary ,server,nowait"
- */
- if (qemu_supports (g, "guestfwd")) {
- /* New-style -net user,guestfwd=... syntax for vmchannel. See:
+ /* These options recommended by KVM developers to improve reliability. */
+ if (qemu_supports (g, "-no-hpet"))
+ add_cmdline (g, "-no-hpet");
+
+ if (qemu_supports (g, "-rtc-td-hack"))
+ add_cmdline (g, "-rtc-td-hack");
+
+ if (qemu_supports (g, "-chardev") && qemu_supports (g, "guestfwd")) {
+ /* New-style -net user,guestfwd=... syntax for guestfwd. See:
+ *
* http://git.savannah.gnu.org/cgit/qemu.git/commit/?id=c92ef6a22d3c71538fcc48fb61ad353f7ba03b62
+ *
+ * The original suggested format doesn't work, see:
+ *
+ * http://lists.gnu.org/archive/html/qemu-devel/2009-07/msg01654.html
+ *
+ * However Gerd Hoffman privately suggested to me using -chardev
+ * instead, which does work.
*/
- snprintf (vmchannel, sizeof vmchannel,
- "user,vlan=0,net=10.0.2.0/8,guestfwd=tcp:%s:%d-unix:%s,server,nowait",
- GUESTFWD_ADDR, GUESTFWD_PORT, unixsock);
+ snprintf (buf, sizeof buf,
+ "socket,id=guestfsvmc,path=%s,server,nowait", unixsock);
+
+ add_cmdline (g, "-chardev");
+ add_cmdline (g, buf);
+
+ snprintf (buf, sizeof buf,
+ "user,vlan=0,net=10.0.2.0/8,"
+ "guestfwd=tcp:" GUESTFWD_ADDR ":" GUESTFWD_PORT
+ "-chardev:guestfsvmc");
add_cmdline (g, "-net");
- add_cmdline (g, vmchannel);
+ add_cmdline (g, buf);
} else {
-#endif
/* Not guestfwd. HOPEFULLY this qemu uses the older -net channel
* syntax, or if not then we'll get a quick failure.
*/
- snprintf (vmchannel, sizeof vmchannel,
- "channel,%d:unix:%s,server,nowait",
- GUESTFWD_PORT, unixsock);
+ snprintf (buf, sizeof buf,
+ "channel," GUESTFWD_PORT ":unix:%s,server,nowait", unixsock);
add_cmdline (g, "-net");
- add_cmdline (g, vmchannel);
+ add_cmdline (g, buf);
add_cmdline (g, "-net");
add_cmdline (g, "user,vlan=0,net=10.0.2.0/8");
-#if 0
}
-#endif
add_cmdline (g, "-net");
add_cmdline (g, "nic,model=" NET_IF ",vlan=0");
+ vmchannel = "guestfs_vmchannel=tcp:" GUESTFWD_ADDR ":" GUESTFWD_PORT " ";
- /* These options recommended by KVM developers to improve reliability. */
- if (qemu_supports (g, "-no-hpet"))
- add_cmdline (g, "-no-hpet");
+#define LINUX_CMDLINE \
+ "panic=1 " /* force kernel to panic if daemon exits */ \
+ "console=ttyS0 " /* serial console */ \
+ "udevtimeout=300 " /* good for very slow systems (RHBZ#480319) */ \
+ "noapic " /* workaround for RHBZ#502058 - ok if not SMP */ \
+ "acpi=off " /* we don't need ACPI, turn it off */ \
+ "cgroup_disable=memory " /* saves us about 5 MB of RAM */
- if (qemu_supports (g, "-rtc-td-hack"))
- add_cmdline (g, "-rtc-td-hack");
+ /* Linux kernel command line. */
+ snprintf (buf, sizeof buf,
+ LINUX_CMDLINE
+ "%s" /* (selinux) */
+ "%s" /* (vmchannel) */
+ "%s" /* (verbose) */
+ "%s", /* (append) */
+ g->selinux ? "selinux=1 enforcing=0 " : "selinux=0 ",
+ vmchannel ? vmchannel : "",
+ g->verbose ? "guestfs_verbose=1 " : "",
+ g->append ? g->append : "");
+
+ add_cmdline (g, "-kernel");
+ add_cmdline (g, (char *) kernel);
+ add_cmdline (g, "-initrd");
+ add_cmdline (g, (char *) initrd);
+ add_cmdline (g, "-append");
+ add_cmdline (g, buf);
/* Finish off the command line. */
incr_cmdline_size (g);
connected:
g->state = LAUNCHING;
+
+ /* Wait for qemu to start and to connect back to us via vmchannel and
+ * send the GUESTFS_LAUNCH_FLAG message.
+ */
+ uint32_t size;
+ void *buf = NULL;
+ r = recv_from_daemon (g, &size, &buf);
+ free (buf);
+
+ if (r == -1) return -1;
+
+ if (size != GUESTFS_LAUNCH_FLAG) {
+ error (g, _("guestfs_launch failed, see earlier error messages"));
+ goto cleanup2;
+ }
+
+ /* This is possible in some really strange situations, such as
+ * guestfsd starts up OK but then qemu immediately exits. Check for
+ * it because the caller is probably expecting to be able to send
+ * commands after this function returns.
+ */
+ if (g->state != READY) {
+ error (g, _("qemu launched and contacted daemon, but state != READY"));
+ goto cleanup2;
+ }
+
return 0;
cleanup2:
return g->qemu_help && strstr (g->qemu_help, option) != NULL;
}
+/* You had to call this function after launch in versions <= 1.0.70,
+ * but it is now a no-op.
+ */
int
guestfs__wait_ready (guestfs_h *g)
{
- int r;
- uint32_t size;
- void *buf = NULL;
-
- if (g->state == READY) return 0;
-
- if (g->state == BUSY) {
- error (g, _("qemu has finished launching already"));
- return -1;
- }
-
- if (g->state != LAUNCHING) {
+ if (g->state != READY) {
error (g, _("qemu has not been launched yet"));
return -1;
}
- r = recv_from_daemon (g, &size, &buf);
- free (buf);
-
- if (r == -1) return -1;
-
- if (size != GUESTFS_LAUNCH_FLAG) {
- error (g, _("guestfs_wait_ready failed, see earlier error messages"));
- return -1;
- }
-
- /* This is possible in some really strange situations, such as
- * guestfsd starts up OK but then qemu immediately exits. Check for
- * it because the caller is probably expecting to be able to send
- * commands after this function returns.
- */
- if (g->state != READY) {
- error (g, _("qemu launched and contacted daemon, but state != READY"));
- return -1;
- }
-
return 0;
}
git.annexia.org / libguestfs.git / blobdiff