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bootconfig: Add xbc_get_info() for the node information

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Add xbc_get_info() API which allows user to get the
number of used xbc_nodes and the size of bootconfig
data. This is also useful for checking the bootconfig
is initialized or not.

Link: https://lkml.kernel.org/r/163177340877.682366.4360676589783197627.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu
2021-09-16 15:23:29 +09:00
committed by Steven Rostedt (VMware)
parent bdac5c2b24
commit e306220cb7
4 changed files with 25 additions and 0 deletions
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21
lib/bootconfig.c
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@@ -34,6 +34,27 @@ static int xbc_err_pos __initdata;
static int open_brace[XBC_DEPTH_MAX] __initdata;
static int brace_index __initdata;
/**
* xbc_get_info() - Get the information of loaded boot config
* node_size: A pointer to store the number of nodes.
* data_size: A pointer to store the size of bootconfig data.
*
* Get the number of used nodes in @node_size if it is not NULL,
* and the size of bootconfig data in @data_size if it is not NULL.
* Return 0 if the boot config is initialized, or return -ENODEV.
*/
int __init xbc_get_info(int *node_size, size_t *data_size)
{
if (!xbc_data)
return -ENODEV;
if (node_size)
*node_size = xbc_node_num;
if (data_size)
*data_size = xbc_data_size;
return 0;
}
static int __init xbc_parse_error(const char *msg, const char *p)
{
xbc_err_msg = msg;