The following commit has been merged in the master branch: commit 3b94747c96c7b78f01f34d090344aa446a5f56f7 Author: Marek Lindner lindner_marek@yahoo.de Date: Sat Dec 10 19:45:53 2011 +0800
batman-adv: allowing changing the routing algorithm via module parameter
Signed-off-by: Marek Lindner lindner_marek@yahoo.de
diff --git a/compat.h b/compat.h index 194e70e..3733f68 100644 --- a/compat.h +++ b/compat.h @@ -61,6 +61,34 @@ #define __rcu #define IFF_BRIDGE_PORT 0 || (hard_iface->net_dev->br_port ? 1 : 0)
+struct kernel_param_ops { + /* Returns 0, or -errno. arg is in kp->arg. */ + int (*set)(const char *val, const struct kernel_param *kp); + /* Returns length written or -errno. Buffer is 4k (ie. be short!) */ + int (*get)(char *buffer, struct kernel_param *kp); + /* Optional function to free kp->arg when module unloaded. */ + void (*free)(void *arg); +}; + +#define module_param_cb(name, ops, arg, perm) \ + static int __compat_set_param_##name(const char *val, \ + struct kernel_param *kp) \ + { return (ops)->set(val, kp); } \ + static int __compat_get_param_##name(char *buffer, \ + struct kernel_param *kp) \ + { return (ops)->get(buffer, kp); } \ + __module_param_call(MODULE_PARAM_PREFIX, name, \ + __compat_set_param_##name, \ + __compat_get_param_##name, arg, \ + __same_type((arg), bool *), perm) + +static inline int __param_set_copystring(const char *val, + const struct kernel_param *kp) +{ + return param_set_copystring(val, (struct kernel_param *)kp); +} +#define param_set_copystring __param_set_copystring + #endif /* < KERNEL_VERSION(2, 6, 36) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39) diff --git a/main.c b/main.c index bcc2bdd..8ae497b 100644 --- a/main.c +++ b/main.c @@ -256,6 +256,30 @@ int bat_algo_seq_print_text(struct seq_file *seq, void *offset) return 0; }
+static int param_set_ra(const char *val, const struct kernel_param *kp) +{ + struct bat_algo_ops *bat_algo_ops; + + bat_algo_ops = bat_algo_get((char *)val); + if (!bat_algo_ops) { + pr_err("Routing algorithm '%s' is not supported\n", val); + return -EINVAL; + } + + return param_set_copystring(val, kp); +} + +static const struct kernel_param_ops param_ops_ra = { + .set = param_set_ra, + .get = param_get_string, +}; + +static struct kparam_string __param_string_ra = { + .maxlen = sizeof(bat_routing_algo), + .string = bat_routing_algo, +}; + +module_param_cb(routing_algo, ¶m_ops_ra, &__param_string_ra, 0644); module_init(batman_init); module_exit(batman_exit);