This sets a `ip=dhcp` or
`ip=<clientip>:<serverip>:<gatewayip>:<netmaskip>::<iface>:` bootarg for
the network device upon execution of 'ifup'. This is the only point
where we can distinguish between a static ip and a dhcp-based network
setup and thus set a valid bootarg options as it will be required for
nfs boot, for example.
Signed-off-by: Enrico Jorns <e...@pengutronix.de>
---
include/net.h | 1 +
net/eth.c | 1 +
net/ifup.c | 10 ++++++++++
3 files changed, 12 insertions(+)
diff --git a/include/net.h b/include/net.h
index fd1c412..632b6d5 100644
--- a/include/net.h
+++ b/include/net.h
@@ -62,6 +62,7 @@ struct eth_device {
IPaddr_t netmask;
IPaddr_t gateway;
char ethaddr[6];
+ char *bootarg;
};
#define dev_to_edev(d) container_of(d, struct eth_device, dev)
diff --git a/net/eth.c b/net/eth.c
index 6f8e78d..e056826 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -384,6 +384,7 @@ int eth_register(struct eth_device *edev)
dev_add_param_ip(dev, "netmask", NULL, NULL, &edev->netmask, edev);
dev_add_param_mac(dev, "ethaddr", eth_param_set_ethaddr, NULL,
edev->ethaddr, edev);
+ dev_add_param_string(dev, "linux.bootargs", NULL, NULL, &edev->bootarg,
NULL);
if (edev->init)
edev->init(edev);
diff --git a/net/ifup.c b/net/ifup.c
index 30ac3f5..618eb8a 100644
--- a/net/ifup.c
+++ b/net/ifup.c
@@ -106,12 +106,22 @@ int ifup(const char *name, unsigned flags)
ret = eth_set_param(dev, "serverip");
if (ret)
goto out;
+ dev_set_param(dev, "linux.bootargs", "ip=dhcp");
} else if (!strcmp(ip, "static")) {
+ char *bootarg;
for (i = 0; i < ARRAY_SIZE(vars); i++) {
ret = eth_set_param(dev, vars[i]);
if (ret)
goto out;
}
+ bootarg = basprintf("ip=%pI4:%pI4:%pI4:%pI4::%s:",
+ &edev->ipaddr,
+ &edev->serverip,
+ &edev->gateway,
+ &edev->netmask,
+ edev->devname);
+ dev_set_param(dev, "linux.bootargs", bootarg);
+ free(bootarg);
} else {
pr_err("unknown ip type: %s\n", ip);
ret = -EINVAL;
--
2.8.1
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