/* libguestfs
- * Copyright (C) 2009 Red Hat Inc.
+ * Copyright (C) 2009-2010 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
}
int
-guestfs__add_drive (guestfs_h *g, const char *filename)
+guestfs__add_drive_with_if (guestfs_h *g, const char *filename,
+ const char *drive_if)
{
size_t len = strlen (filename) + 64;
char buf[len];
int fd = open (filename, O_RDONLY|O_DIRECT);
if (fd >= 0) {
close (fd);
- snprintf (buf, len, "file=%s,cache=off,if=" DRIVE_IF, filename);
+ snprintf (buf, len, "file=%s,cache=off,if=%s", filename, drive_if);
} else {
fd = open (filename, O_RDONLY);
if (fd >= 0) {
close (fd);
- snprintf (buf, len, "file=%s,if=" DRIVE_IF, filename);
+ snprintf (buf, len, "file=%s,if=%s", filename, drive_if);
} else {
perrorf (g, "%s", filename);
return -1;
}
int
-guestfs__add_drive_ro (guestfs_h *g, const char *filename)
+guestfs__add_drive_ro_with_if (guestfs_h *g, const char *filename,
+ const char *drive_if)
{
size_t len = strlen (filename) + 64;
char buf[len];
return -1;
}
- snprintf (buf, len, "file=%s,snapshot=on,if=%s", filename, DRIVE_IF);
+ snprintf (buf, len, "file=%s,snapshot=on,if=%s", filename, drive_if);
return guestfs__config (g, "-drive", buf);
}
int
+guestfs__add_drive (guestfs_h *g, const char *filename)
+{
+ return guestfs__add_drive_with_if (g, filename, DRIVE_IF);
+}
+
+int
+guestfs__add_drive_ro (guestfs_h *g, const char *filename)
+{
+ return guestfs__add_drive_ro_with_if (g, filename, DRIVE_IF);
+}
+
+int
guestfs__add_cdrom (guestfs_h *g, const char *filename)
{
if (strchr (filename, ',') != NULL) {
static int build_supermin_appliance (guestfs_h *g, const char *path, char **kernel, char **initrd);
static int test_qemu (guestfs_h *g);
static int qemu_supports (guestfs_h *g, const char *option);
+static int is_openable (guestfs_h *g, const char *path, int flags);
static void print_cmdline (guestfs_h *g);
static const char *kernel_name = "vmlinuz." REPO "." host_cpu;
*/
g->cmdline[0] = g->qemu;
- snprintf (buf, sizeof buf, "%d", g->memsize);
- add_cmdline (g, "-m");
- add_cmdline (g, buf);
+ /* qemu sometimes needs this option to enable hardware
+ * virtualization, but some versions of 'qemu-kvm' will use KVM
+ * regardless (even where this option appears in the help text).
+ * It is rumoured that there are versions of qemu where supplying
+ * this option when hardware virtualization is not available will
+ * cause qemu to fail, so we we have to check at least that
+ * /dev/kvm is openable. That's not reliable, since /dev/kvm
+ * might be openable by qemu but not by us (think: SELinux) in
+ * which case the user would not get hardware virtualization,
+ * although at least shouldn't fail. A giant clusterfuck with the
+ * qemu command line, again.
+ */
+ if (qemu_supports (g, "-enable-kvm") &&
+ is_openable (g, "/dev/kvm", O_RDWR))
+ add_cmdline (g, "-enable-kvm");
+
+ /* Newer versions of qemu (from around 2009/12) changed the
+ * behaviour of monitors so that an implicit '-monitor stdio' is
+ * assumed if we are in -nographic mode and there is no other
+ * -monitor option. Only a single stdio device is allowed, so
+ * this broke the '-serial stdio' option. There is a new flag
+ * called -nodefaults which gets rid of all this default crud, so
+ * let's use that to avoid this and any future surprises.
+ */
+ if (qemu_supports (g, "-nodefaults"))
+ add_cmdline (g, "-nodefaults");
- add_cmdline (g, "-no-reboot"); /* Force exit instead of reboot on panic */
add_cmdline (g, "-nographic");
add_cmdline (g, "-serial");
add_cmdline (g, "stdio");
+ snprintf (buf, sizeof buf, "%d", g->memsize);
+ add_cmdline (g, "-m");
+ add_cmdline (g, buf);
+
+ /* Force exit instead of reboot on panic */
+ add_cmdline (g, "-no-reboot");
+
/* These options recommended by KVM developers to improve reliability. */
if (qemu_supports (g, "-no-hpet"))
add_cmdline (g, "-no-hpet");
snprintf (cmd, sizeof cmd,
"PATH='%s':$PATH "
- "libguestfs-supermin-helper '%s' %s %s",
+ "libguestfs-supermin-helper '%s' " host_cpu " " REPO " %s %s",
path,
path, *kernel, *initrd);
+ if (g->verbose)
+ print_timestamped_message (g, "%s", cmd);
r = system (cmd);
if (r == -1 || WEXITSTATUS(r) != 0) {
va_list args;
char *msg;
int err;
- struct timeval tv, diff;
+ struct timeval tv;
va_start (args, fs);
err = vasprintf (&msg, fs, args);
return g->qemu_help && strstr (g->qemu_help, option) != NULL;
}
+/* Check if a file can be opened. */
+static int
+is_openable (guestfs_h *g, const char *path, int flags)
+{
+ int fd = open (path, flags);
+ if (fd == -1) {
+ if (g->verbose)
+ perror (path);
+ return 0;
+ }
+ close (fd);
+ return 1;
+}
+
/* Check the peer effective UID for a TCP socket. Ideally we'd like
* SO_PEERCRED for a loopback TCP socket. This isn't possible on
* Linux (but it is on Solaris!) so we read /proc/net/tcp instead.
{
void *buf;
int fd, r;
- size_t len;
fd = open (filename, O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY, 0666);
if (fd == -1) {
git.annexia.org / libguestfs.git / blobdiff