lib: Add support for tracking boot consoles

Add tty_list and boot_tty to the config struct to keep track of
available console interfaces and the default console to set as primary
respectively.
Also add a tty field to the boot_command struct so that the current
console can be sent to the discover server during a manual boot command.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

3 files changed, 49 insertions, 2 deletions

diff --git a/lib/pb-config/pb-config.c b/lib/pb-config/pb-config.c
index 92c7e74..52a43b1 100644
--- a/lib/pb-config/pb-config.c
+++ b/lib/pb-config/pb-config.c
@@ -42,7 +42,7 @@ struct config *config_copy(void *ctx, const struct config *src)
 	struct config *dest;
 	unsigned int i;
 
-	dest = talloc(ctx, struct config);
+	dest = talloc_zero(ctx, struct config);
 	dest->autoboot_enabled = src->autoboot_enabled;
 	dest->autoboot_timeout_sec = src->autoboot_timeout_sec;
 	dest->safe_mode = src->safe_mode;
@@ -82,6 +82,16 @@ struct config *config_copy(void *ctx, const struct config *src)
 
 	dest->allow_writes = src->allow_writes;
 
+	dest->n_tty = src->n_tty;
+	if (src->tty_list)
+		dest->tty_list = talloc_array(dest, char *, src->n_tty);
+	for (i = 0; i < src->n_tty && src->n_tty; i++)
+		dest->tty_list[i] = talloc_strdup(dest->tty_list,
+						src->tty_list[i]);
+
+	if (src->boot_tty)
+		dest->boot_tty = talloc_strdup(dest, src->boot_tty);
+
 	if (src->lang && strlen(src->lang))
 		dest->lang = talloc_strdup(dest, src->lang);
 	else
diff --git a/lib/pb-protocol/pb-protocol.c b/lib/pb-protocol/pb-protocol.c
index 9091709..7887fb0 100644
--- a/lib/pb-protocol/pb-protocol.c
+++ b/lib/pb-protocol/pb-protocol.c
@@ -206,7 +206,8 @@ int pb_protocol_boot_len(const struct boot_command *boot)
 		4 + optional_strlen(boot->boot_image_file) +
 		4 + optional_strlen(boot->initrd_file) +
 		4 + optional_strlen(boot->dtb_file) +
-		4 + optional_strlen(boot->boot_args);
+		4 + optional_strlen(boot->boot_args) +
+		4 + optional_strlen(boot->tty);
 }
 
 int pb_protocol_boot_status_len(const struct boot_status *status)
@@ -310,6 +311,12 @@ int pb_protocol_config_len(const struct config *config)
 
 	len += 4; /* allow_writes */
 
+	len += 4; /* n_tty */
+	for (i = 0; i < config->n_tty; i++)
+		len += 4 + optional_strlen(config->tty_list[i]);
+
+	len += 4 + optional_strlen(config->boot_tty);
+
 	len += 4 + optional_strlen(config->lang);
 
 	return len;
@@ -373,6 +380,7 @@ int pb_protocol_serialise_boot_command(const struct boot_command *boot,
 	pos += pb_protocol_serialise_string(pos, boot->initrd_file);
 	pos += pb_protocol_serialise_string(pos, boot->dtb_file);
 	pos += pb_protocol_serialise_string(pos, boot->boot_args);
+	pos += pb_protocol_serialise_string(pos, boot->tty);
 
 	assert(pos <= buf + buf_len);
 	(void)buf_len;
@@ -553,6 +561,13 @@ int pb_protocol_serialise_config(const struct config *config,
 	*(uint32_t *)pos = config->allow_writes;
 	pos += 4;
 
+	*(uint32_t *)pos = __cpu_to_be32(config->n_tty);
+	pos += 4;
+	for (i = 0; i < config->n_tty; i++)
+		pos += pb_protocol_serialise_string(pos, config->tty_list[i]);
+
+	pos += pb_protocol_serialise_string(pos, config->boot_tty);
+
 	pos += pb_protocol_serialise_string(pos, config->lang);
 
 	assert(pos <= buf + buf_len);
@@ -770,6 +785,9 @@ int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
 	if (read_string(cmd, &pos, &len, &cmd->boot_args))
 		goto out;
 
+	if (read_string(cmd, &pos, &len, &cmd->tty))
+		goto out;
+
 	rc = 0;
 
 out:
@@ -1069,6 +1087,21 @@ int pb_protocol_deserialise_config(struct config *config,
 		goto out;
 	config->allow_writes = !!tmp;
 
+	if (read_u32(&pos, &len, &config->n_tty))
+		goto out;
+
+	config->tty_list = talloc_array(config, char *, config->n_tty);
+	for (i = 0; i < config->n_tty; i++) {
+		if (read_string(config->tty_list, &pos, &len, &str))
+			goto out;
+		config->tty_list[i] = str;
+	}
+
+	if (read_string(config, &pos, &len, &str))
+		goto out;
+
+	config->boot_tty = str;
+
 	if (read_string(config, &pos, &len, &str))
 		goto out;
 
diff --git a/lib/types/types.h b/lib/types/types.h
index 6ff4620..5c5f6ed 100644
--- a/lib/types/types.h
+++ b/lib/types/types.h
@@ -65,6 +65,7 @@ struct boot_command {
 	char *initrd_file;
 	char *dtb_file;
 	char *boot_args;
+	char *tty;
 };
 
 struct boot_status {
@@ -159,9 +160,12 @@ struct config {
 
 	bool			allow_writes;
 
+	char			*boot_tty;
 	char			*lang;
 
 	/* not user-settable */
+	unsigned int		n_tty;
+	char			**tty_list;
 	bool			disable_snapshots;
 	bool			safe_mode;
 	bool			debug;