config: Add boot_device member to config

We'd like to specify a way to only boot from a specific block device;
this adds a field to the configuration to hold the value.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

3 files changed, 16 insertions, 3 deletions

diff --git a/lib/pb-config/pb-config.c b/lib/pb-config/pb-config.c
index ed84fec..2adc7b2 100644
--- a/lib/pb-config/pb-config.c
+++ b/lib/pb-config/pb-config.c
@@ -68,5 +68,10 @@ struct config *config_copy(void *ctx, const struct config *src)
 		dest->boot_priorities[i].type = src->boot_priorities[i].type;
 	}
 
+	if (src->boot_device && strlen(src->boot_device))
+		dest->boot_device = talloc_strdup(dest, src->boot_device);
+	else
+		dest->boot_device = NULL;
+
 	return dest;
 }
diff --git a/lib/pb-protocol/pb-protocol.c b/lib/pb-protocol/pb-protocol.c
index cf27b8e..4a5c75a 100644
--- a/lib/pb-protocol/pb-protocol.c
+++ b/lib/pb-protocol/pb-protocol.c
@@ -472,6 +472,8 @@ int pb_protocol_serialise_config(const struct config *config,
 		pos += 4;
 	}
 
+	pos += pb_protocol_serialise_string(pos, config->boot_device);
+
 	assert(pos <= buf + buf_len);
 	(void)buf_len;
 
@@ -846,6 +848,7 @@ int pb_protocol_deserialise_config(struct config *config,
 	unsigned int len, i, tmp;
 	const char *pos;
 	int rc = -1;
+	char *str;
 
 	len = message->payload_len;
 	pos = message->payload;
@@ -878,10 +881,9 @@ int pb_protocol_deserialise_config(struct config *config,
 			config->network.n_dns_servers);
 
 	for (i = 0; i < config->network.n_dns_servers; i++) {
-		char *tmp;
-		if (read_string(config->network.dns_servers, &pos, &len, &tmp))
+		if (read_string(config->network.dns_servers, &pos, &len, &str))
 			goto out;
-		config->network.dns_servers[i] = tmp;
+		config->network.dns_servers[i] = str;
 	}
 
 	if (read_u32(&pos, &len, &config->n_boot_priorities))
@@ -898,6 +900,11 @@ int pb_protocol_deserialise_config(struct config *config,
 		config->boot_priorities[i].type = tmp;
 	}
 
+	if (read_string(config, &pos, &len, &str))
+		goto out;
+
+	config->boot_device = str;
+
 	rc = 0;
 
 out:
diff --git a/lib/types/types.h b/lib/types/types.h
index 1293193..762530a 100644
--- a/lib/types/types.h
+++ b/lib/types/types.h
@@ -124,6 +124,7 @@ struct config {
 	struct network_config	network;
 	struct boot_priority	*boot_priorities;
 	unsigned int		n_boot_priorities;
+	char			*boot_device;
 };
 
 #endif /* _TYPES_H */