This new option disables the kernel DHCP which runs when starting
a custom rootfs.
This is useful when we want to start a rootfs but are using a network
other than the usermode IP proxy (a network which doesn't provide DHCP).
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
---
tools/kvm/builtin-run.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/tools/kvm/builtin-run.c b/tools/kvm/builtin-run.c
index 3b00bf0..43cf2c4 100644
--- a/tools/kvm/builtin-run.c
+++ b/tools/kvm/builtin-run.c
@@ -91,6 +91,7 @@ static bool balloon;
static bool using_rootfs;
static bool custom_rootfs;
static bool no_net;
+static bool no_dhcp;
extern bool ioport_debug;
extern int active_console;
extern int debug_iodelay;
@@ -432,6 +433,7 @@ static const struct option options[] = {
OPT_CALLBACK_DEFAULT('n', "network", NULL, "network params",
"Create a new guest NIC",
netdev_parser, NULL),
+ OPT_BOOLEAN('\0', "no-dhcp", &no_dhcp, "Disable kernel DHCP in rootfs mode"),
OPT_GROUP("BIOS options:"),
OPT_INTEGER('\0', "vidmode", &vidmode,
@@ -861,8 +863,11 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
if (using_rootfs) {
strcat(real_cmdline, " root=/dev/root rw rootflags=rw,trans=virtio,version=9p2000.L rootfstype=9p");
- if (custom_rootfs)
- strcat(real_cmdline, " init=/virt/init ip=dhcp");
+ if (custom_rootfs) {
+ strcat(real_cmdline, " init=/virt/init");
+ if (!no_dhcp)
+ strcat(real_cmdline, " ip=dhcp");
+ }
} else if (!strstr(real_cmdline, "root=")) {
strlcat(real_cmdline, " root=/dev/vda rw ", sizeof(real_cmdline));
}
--
1.7.8.rc1
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