#include <linux/notifier.h>
#include <linux/stop_machine.h>
#include <linux/device.h>
+#include <linux/string.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <asm/cacheflush.h>
#endif /* CONFIG_SMP */
#ifdef CONFIG_MODULE_UNLOAD
+#define MODINFO_ATTR(field) \
+static void setup_modinfo_##field(struct module *mod, const char *s) \
+{ \
+ mod->field = kstrdup(s, GFP_KERNEL); \
+} \
+static ssize_t show_modinfo_##field(struct module_attribute *mattr, \
+ struct module *mod, char *buffer) \
+{ \
+ return sprintf(buffer, "%s\n", mod->field); \
+} \
+static int modinfo_##field##_exists(struct module *mod) \
+{ \
+ return mod->field != NULL; \
+} \
+static void free_modinfo_##field(struct module *mod) \
+{ \
+ kfree(mod->field); \
+ mod->field = NULL; \
+} \
+static struct module_attribute modinfo_##field = { \
+ .attr = { .name = __stringify(field), .mode = 0444, \
+ .owner = THIS_MODULE }, \
+ .show = show_modinfo_##field, \
+ .setup = setup_modinfo_##field, \
+ .test = modinfo_##field##_exists, \
+ .free = free_modinfo_##field, \
+};
+
+MODINFO_ATTR(version);
+MODINFO_ATTR(srcversion);
+
+static struct module_attribute *modinfo_attrs[] = {
+ &modinfo_version,
+ &modinfo_srcversion,
+ NULL,
+};
+
/* Init the unload section of the module. */
static void module_unload_init(struct module *mod)
{
for (i = 0; i < NR_CPUS; i++)
local_set(&mod->ref[i].count, 0);
/* Hold reference count during initialization. */
- local_set(&mod->ref[_smp_processor_id()].count, 1);
+ local_set(&mod->ref[raw_smp_processor_id()].count, 1);
/* Backwards compatibility macros put refcount during init. */
mod->waiter = current;
}
return 0;
}
-int set_obsolete(const char *val, struct kernel_param *kp)
+static int set_obsolete(const char *val, struct kernel_param *kp)
{
unsigned int min, max;
unsigned int size, maxsize;
}
#endif
+#ifdef CONFIG_MODULE_UNLOAD
+static int module_add_modinfo_attrs(struct module *mod)
+{
+ struct module_attribute *attr;
+ int error = 0;
+ int i;
+
+ for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) {
+ if (!attr->test ||
+ (attr->test && attr->test(mod)))
+ error = sysfs_create_file(&mod->mkobj.kobj,&attr->attr);
+ }
+ return error;
+}
+
+static void module_remove_modinfo_attrs(struct module *mod)
+{
+ struct module_attribute *attr;
+ int i;
+
+ for (i = 0; (attr = modinfo_attrs[i]); i++) {
+ sysfs_remove_file(&mod->mkobj.kobj,&attr->attr);
+ attr->free(mod);
+ }
+}
+#endif
static int mod_sysfs_setup(struct module *mod,
struct kernel_param *kparam,
if (err)
goto out_unreg;
+#ifdef CONFIG_MODULE_UNLOAD
+ err = module_add_modinfo_attrs(mod);
+ if (err)
+ goto out_unreg;
+#endif
+
return 0;
out_unreg:
static void mod_kobject_remove(struct module *mod)
{
+#ifdef CONFIG_MODULE_UNLOAD
+ module_remove_modinfo_attrs(mod);
+#endif
module_remove_refcnt_attr(mod);
module_param_sysfs_remove(mod);
return NULL;
}
+#ifdef CONFIG_MODULE_UNLOAD
+static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs,
+ unsigned int infoindex)
+{
+ struct module_attribute *attr;
+ int i;
+
+ for (i = 0; (attr = modinfo_attrs[i]); i++) {
+ if (attr->setup)
+ attr->setup(mod,
+ get_modinfo(sechdrs,
+ infoindex,
+ attr->attr.name));
+ }
+}
+#endif
+
#ifdef CONFIG_KALLSYMS
int is_exported(const char *name, const struct module *mod)
{
/* Set up license info based on the info section */
set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
+#ifdef CONFIG_MODULE_UNLOAD
+ /* Set up MODINFO_ATTR fields */
+ setup_modinfo(mod, sechdrs, infoindex);
+#endif
+
/* Fix up syms, so that st_value is a pointer to location. */
err = simplify_symbols(sechdrs, symindex, strtab, versindex, pcpuindex,
mod);
const char __user *uargs)
{
struct module *mod;
+ mm_segment_t old_fs = get_fs();
int ret = 0;
/* Must have permission */
return PTR_ERR(mod);
}
+ /* flush the icache in correct context */
+ set_fs(KERNEL_DS);
+
/* Flush the instruction cache, since we've played with text */
if (mod->module_init)
flush_icache_range((unsigned long)mod->module_init,
flush_icache_range((unsigned long)mod->module_core,
(unsigned long)mod->module_core + mod->core_size);
+ set_fs(old_fs);
+
/* Now sew it into the lists. They won't access us, since
strong_try_module_get() will fail. */
stop_machine_run(__link_module, mod, NR_CPUS);
/* Init routine failed: abort. Try to protect us from
buggy refcounters. */
mod->state = MODULE_STATE_GOING;
- synchronize_kernel();
+ synchronize_sched();
if (mod->unsafe)
printk(KERN_ERR "%s: module is now stuck!\n",
mod->name);