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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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include/linux/bootconfig.h
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@ -273,6 +273,8 @@ static inline int __init xbc_node_compose_key(struct xbc_node *node,
/* XBC node initializer */
int __init xbc_init(const char *buf, size_t size, const char **emsg, int *epos);
/* XBC node and size information */
int __init xbc_get_info(int *node_size, size_t *data_size);
/* XBC cleanup data structures */
void __init xbc_destroy_all(void);