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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2021-09-16 08:23:29 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-10-11 02:43:53 +0200 |
| commit | e306220cb7b7c2948f191414ab06851e143b54c1 (patch) | |
| tree | ba1934544e721a548cc94935c1a4878cec050739 /lib/bootconfig.c | |
| parent | bootconfig: Allocate xbc_data inside xbc_init() (diff) | |
| download | linux-e306220cb7b7c2948f191414ab06851e143b54c1.tar.xz linux-e306220cb7b7c2948f191414ab06851e143b54c1.zip | |
bootconfig: Add xbc_get_info() for the node information
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>
Diffstat (limited to 'lib/bootconfig.c')
| -rw-r--r-- | lib/bootconfig.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/bootconfig.c b/lib/bootconfig.c index 66b02fddfea8..b088fe5c0001 100644 --- a/lib/bootconfig.c +++ b/lib/bootconfig.c @@ -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; |