Write the configuration of each module used to the image header.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/io.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 67 insertions(+), 0 deletions(-)
diff --git a/kernel/power/io.c b/kernel/power/io.c
index dade1fc..a0aabd1 100644
--- a/kernel/power/io.c
+++ b/kernel/power/io.c
@@ -421,3 +421,70 @@ static int read_pageset(struct pagedir *
return result;
}
+/* write_module_configs()
+ *
+ * Description: Store the configuration for each module in the image header.
+ * Returns: Int: Zero on success, Error value otherwise.
+ */
+static int write_module_configs(void)
+{
+ struct suspend_module_ops *this_module;
+ char *buffer = (char *) get_zeroed_page(GFP_ATOMIC);
+ int len, index = 1;
+ struct suspend_module_header suspend_module_header;
+
+ if (!buffer) {
+ printk("Failed to allocate a buffer for saving "
+ "module configuration info.\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * We have to know which data goes with which module, so we at
+ * least write a length of zero for a module. Note that we are
+ * also assuming every module's config data takes <= PAGE_SIZE.
+ */
+
+ /* For each module (in registration order) */
+ list_for_each_entry(this_module, &suspend_modules, module_list) {
+ if (this_module->disabled || !this_module->storage_needed ||
+ (this_module->type == WRITER_MODULE &&
+ suspend_active_writer != this_module))
+ continue;
+
+ /* Get the data from the module */
+ len = 0;
+ if (this_module->save_config_info)
+ len = this_module->save_config_info(buffer);
+
+ /* Save the details of the module */
+ suspend_module_header.disabled = this_module->disabled;
+ suspend_module_header.type = this_module->type;
+ suspend_module_header.index = index++;
+ strncpy(suspend_module_header.name, this_module->name,
+ sizeof(suspend_module_header.name));
+ suspend_active_writer->rw_header_chunk(WRITE,
+ this_module,
+ (char *) &suspend_module_header,
+ sizeof(suspend_module_header));
+
+ /* Save the size of the data and any data returned */
+ suspend_active_writer->rw_header_chunk(WRITE,
+ this_module,
+ (char *) &len, sizeof(int));
+ if (len)
+ suspend_active_writer->rw_header_chunk(
+ WRITE, this_module, buffer, len);
+ }
+
+ /* Write a blank header to terminate the list */
+ suspend_module_header.name[0] = '\0';
+ suspend_active_writer->rw_header_chunk(WRITE,
+ NULL,
+ (char *) &suspend_module_header,
+ sizeof(suspend_module_header));
+
+ free_page((unsigned long) buffer);
+ return 0;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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