Reorder and add module params example

.envrc

@@ -1 +1 @@
-use flake
+use flake .#other

02_module_params/test_module.c

@@ -0,0 +1,53 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+static short int myshort = 1;
+static int myint = 420;
+static long int mylong = 9999;
+static char *mystring = "blah";
+static int myintarray[2] = { 420, 420 };
+static int arr_argc = 0;
+
+module_param(myshort, short, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); 
+MODULE_PARM_DESC(myshort, "A short integer"); 
+
+module_param(myint, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); 
+MODULE_PARM_DESC(myint, "An integer"); 
+
+module_param(mylong, long, S_IRUSR); 
+MODULE_PARM_DESC(mylong, "A long integer"); 
+
+module_param(mystring, charp, 0000); 
+MODULE_PARM_DESC(mystring, "A character string");
+
+module_param_array(myintarray, int, &arr_argc, 0000); 
+MODULE_PARM_DESC(myintarray, "An array of integers"); 
+
+static int __init module_params_init(void) {
+    int i;
+
+    pr_info("myshort: %hd\n", myshort);
+    pr_info("myint: %d\n", myint);
+    pr_info("mylong: %ld\n", mylong);
+    pr_info("mystring: %s\n", mystring);
+
+    for (i = 0; i < ARRAY_SIZE(myintarray); i++)
+        pr_info("myintarray[%d] = %d\n", i, myintarray[i]);
+
+    pr_info("%d arguments for myintarray.\n", arr_argc);
+
+    pr_info("Module avec paramètre chargé.\n");
+    return 0;
+}
+
+static void __exit module_params_exit(void) {
+    pr_info("Module avec paramètre déchargé.\n");
+}
+
+module_init(module_params_init);
+module_exit(module_params_exit);
+
+MODULE_LICENSE("MIT License");
+MODULE_AUTHOR("Florian RICHER");
+MODULE_DESCRIPTION("Un module noyau avec paramètre déchargé.");
+MODULE_VERSION("1.0");

05_packet_filter/Makefile

@@ -0,0 +1,7 @@
+obj-m += test_module.o
+
+all:
+	make -C $(LINUX_MODULES_FOLDER)/build M=$(PWD) modules
+
+clean:
+	make -C $(LINUX_MODULES_FOLDER)/build M=$(PWD) clean

README.md

@@ -54,6 +54,7 @@ sudo rmmod [module_name].ko
 - https://www.kernel.org/doc/html/latest/
 - https://elixir.bootlin.com/linux/v6.13/source/
 - https://static.lwn.net/images/pdf/LDD3/ch01.pdf
+- https://sysprog21.github.io/lkmpg
 
 ## Notes