#include <linux/moduleloader.h>
#include <linux/init.h>
#include <linux/kallsyms.h>
+#include <linux/fs.h>
#include <linux/sysfs.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/elf.h>
+#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/syscalls.h>
#include <linux/fcntl.h>
#include <linux/device.h>
#include <linux/string.h>
#include <linux/mutex.h>
-#include <linux/unwind.h>
+#include <linux/rculist.h>
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
#include <linux/license.h>
#include <asm/sections.h>
#include <linux/tracepoint.h>
#include <linux/ftrace.h>
+#include <linux/async.h>
#if 0
#define DEBUGP printk
#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
/* List of modules, protected by module_mutex or preempt_disable
- * (add/delete uses stop_machine). */
+ * (delete uses stop_machine/add uses RCU list operations). */
static DEFINE_MUTEX(module_mutex);
static LIST_HEAD(modules);
static inline void add_taint_module(struct module *mod, unsigned flag)
{
add_taint(flag);
- mod->taints |= flag;
+ mod->taints |= (1U << flag);
}
/*
return 0;
}
+/* Find a module section, or NULL. */
+static void *section_addr(Elf_Ehdr *hdr, Elf_Shdr *shdrs,
+ const char *secstrings, const char *name)
+{
+ /* Section 0 has sh_addr 0. */
+ return (void *)shdrs[find_sec(hdr, shdrs, secstrings, name)].sh_addr;
+}
+
+/* Find a module section, or NULL. Fill in number of "objects" in section. */
+static void *section_objs(Elf_Ehdr *hdr,
+ Elf_Shdr *sechdrs,
+ const char *secstrings,
+ const char *name,
+ size_t object_size,
+ unsigned int *num)
+{
+ unsigned int sec = find_sec(hdr, sechdrs, secstrings, name);
+
+ /* Section 0 has sh_addr 0 and sh_size 0. */
+ *num = sechdrs[sec].sh_size / object_size;
+ return (void *)sechdrs[sec].sh_addr;
+}
+
/* Provided by the linker */
extern const struct kernel_symbol __start___ksymtab[];
extern const struct kernel_symbol __stop___ksymtab[];
if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data))
return true;
- list_for_each_entry(mod, &modules, list) {
+ list_for_each_entry_rcu(mod, &modules, list) {
struct symsearch arr[] = {
{ mod->syms, mod->syms + mod->num_syms, mod->crcs,
NOT_GPL_ONLY, false },
/* Init the unload section of the module. */
static void module_unload_init(struct module *mod)
{
- unsigned int i;
+ int cpu;
INIT_LIST_HEAD(&mod->modules_which_use_me);
- for (i = 0; i < NR_CPUS; i++)
- local_set(&mod->ref[i].count, 0);
+ for_each_possible_cpu(cpu)
+ local_set(__module_ref_addr(mod, cpu), 0);
/* Hold reference count during initialization. */
- local_set(&mod->ref[raw_smp_processor_id()].count, 1);
+ local_set(__module_ref_addr(mod, raw_smp_processor_id()), 1);
/* Backwards compatibility macros put refcount during init. */
mod->waiter = current;
}
unsigned int module_refcount(struct module *mod)
{
- unsigned int i, total = 0;
+ unsigned int total = 0;
+ int cpu;
- for (i = 0; i < NR_CPUS; i++)
- total += local_read(&mod->ref[i].count);
+ for_each_possible_cpu(cpu)
+ total += local_read(__module_ref_addr(mod, cpu));
return total;
}
EXPORT_SYMBOL(module_refcount);
mutex_lock(&module_mutex);
}
-asmlinkage long
-sys_delete_module(const char __user *name_user, unsigned int flags)
+SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
+ unsigned int, flags)
{
struct module *mod;
char name[MODULE_NAME_LEN];
return -EFAULT;
name[MODULE_NAME_LEN-1] = '\0';
- if (mutex_lock_interruptible(&module_mutex) != 0)
- return -EINTR;
+ /* Create stop_machine threads since free_module relies on
+ * a non-failing stop_machine call. */
+ ret = stop_machine_create();
+ if (ret)
+ return ret;
+
+ if (mutex_lock_interruptible(&module_mutex) != 0) {
+ ret = -EINTR;
+ goto out_stop;
+ }
mod = find_module(name);
if (!mod) {
mod->exit();
blocking_notifier_call_chain(&module_notify_list,
MODULE_STATE_GOING, mod);
+ async_synchronize_full();
mutex_lock(&module_mutex);
/* Store the name of the last unloaded module for diagnostic purposes */
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
+ unregister_dynamic_debug_module(mod->name);
free_module(mod);
out:
mutex_unlock(&module_mutex);
+out_stop:
+ stop_machine_destroy();
return ret;
}
-static void print_unload_info(struct seq_file *m, struct module *mod)
+static inline void print_unload_info(struct seq_file *m, struct module *mod)
{
struct module_use *use;
int printed_something = 0;
{
if (module) {
unsigned int cpu = get_cpu();
- local_dec(&module->ref[cpu].count);
+ local_dec(__module_ref_addr(module, cpu));
/* Maybe they're waiting for us to drop reference? */
if (unlikely(!module_is_live(module)))
wake_up_process(module->waiter);
EXPORT_SYMBOL(module_put);
#else /* !CONFIG_MODULE_UNLOAD */
-static void print_unload_info(struct seq_file *m, struct module *mod)
+static inline void print_unload_info(struct seq_file *m, struct module *mod)
{
/* We don't know the usage count, or what modules are using. */
seq_printf(m, " - -");
static int try_to_force_load(struct module *mod, const char *symname)
{
#ifdef CONFIG_MODULE_FORCE_LOAD
- if (!(tainted & TAINT_FORCED_MODULE))
+ if (!test_taint(TAINT_FORCED_MODULE))
printk("%s: no version for \"%s\" found: kernel tainted.\n",
mod->name, symname);
add_taint_module(mod, TAINT_FORCED_MODULE);
const unsigned long *crc;
ret = find_symbol(name, &owner, &crc,
- !(mod->taints & TAINT_PROPRIETARY_MODULE), true);
+ !(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true);
if (!IS_ERR_VALUE(ret)) {
/* use_module can fail due to OOM,
or module initialization or unloading */
while (i-- > 0)
sysfs_remove_bin_file(notes_attrs->dir,
¬es_attrs->attrs[i]);
- kobject_del(notes_attrs->dir);
+ kobject_put(notes_attrs->dir);
}
kfree(notes_attrs);
}
}
/*
- * link the module with the whole machine is stopped with interrupts off
- * - this defends against kallsyms not taking locks
- */
-static int __link_module(void *_mod)
-{
- struct module *mod = _mod;
- list_add(&mod->list, &modules);
- return 0;
-}
-
-/*
* unlink the module with the whole machine is stopped with interrupts off
* - this defends against kallsyms not taking locks
*/
remove_sect_attrs(mod);
mod_kobject_remove(mod);
- unwind_remove_table(mod->unwind_info, 0);
-
/* Arch-specific cleanup. */
module_arch_cleanup(mod);
/* Module unload stuff */
module_unload_free(mod);
+ /* release any pointers to mcount in this module */
+ ftrace_release(mod->module_core, mod->core_size);
+
/* This may be NULL, but that's OK */
module_free(mod, mod->module_init);
kfree(mod->args);
if (mod->percpu)
percpu_modfree(mod->percpu);
-
+#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
+ if (mod->refptr)
+ percpu_modfree(mod->refptr);
+#endif
/* Free lock-classes: */
lockdep_free_key_range(mod->module_core, mod->core_size);
return ret;
}
+/* Additional bytes needed by arch in front of individual sections */
+unsigned int __weak arch_mod_section_prepend(struct module *mod,
+ unsigned int section)
+{
+ /* default implementation just returns zero */
+ return 0;
+}
+
/* Update size with this section: return offset. */
-static long get_offset(unsigned int *size, Elf_Shdr *sechdr)
+static long get_offset(struct module *mod, unsigned int *size,
+ Elf_Shdr *sechdr, unsigned int section)
{
long ret;
+ *size += arch_mod_section_prepend(mod, section);
ret = ALIGN(*size, sechdr->sh_addralign ?: 1);
*size = ret + sechdr->sh_size;
return ret;
|| strncmp(secstrings + s->sh_name,
".init", 5) == 0)
continue;
- s->sh_entsize = get_offset(&mod->core_size, s);
+ s->sh_entsize = get_offset(mod, &mod->core_size, s, i);
DEBUGP("\t%s\n", secstrings + s->sh_name);
}
if (m == 0)
|| strncmp(secstrings + s->sh_name,
".init", 5) != 0)
continue;
- s->sh_entsize = (get_offset(&mod->init_size, s)
+ s->sh_entsize = (get_offset(mod, &mod->init_size, s, i)
| INIT_OFFSET_MASK);
DEBUGP("\t%s\n", secstrings + s->sh_name);
}
license = "unspecified";
if (!license_is_gpl_compatible(license)) {
- if (!(tainted & TAINT_PROPRIETARY_MODULE))
+ if (!test_taint(TAINT_PROPRIETARY_MODULE))
printk(KERN_WARNING "%s: module license '%s' taints "
"kernel.\n", mod->name, license);
add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
return NULL;
}
-static int is_exported(const char *name, const struct module *mod)
+static int is_exported(const char *name, unsigned long value,
+ const struct module *mod)
{
- if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab))
- return 1;
+ const struct kernel_symbol *ks;
+ if (!mod)
+ ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab);
else
- if (mod && lookup_symbol(name, mod->syms, mod->syms + mod->num_syms))
- return 1;
- else
- return 0;
+ ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms);
+ return ks != NULL && ks->value == value;
}
/* As per nm */
}
#endif /* CONFIG_KALLSYMS */
+static void dynamic_printk_setup(struct mod_debug *debug, unsigned int num)
+{
+#ifdef CONFIG_DYNAMIC_PRINTK_DEBUG
+ unsigned int i;
+
+ for (i = 0; i < num; i++) {
+ register_dynamic_debug_module(debug[i].modname,
+ debug[i].type,
+ debug[i].logical_modname,
+ debug[i].flag_names,
+ debug[i].hash, debug[i].hash2);
+ }
+#endif /* CONFIG_DYNAMIC_PRINTK_DEBUG */
+}
+
static void *module_alloc_update_bounds(unsigned long size)
{
void *ret = module_alloc(size);
Elf_Ehdr *hdr;
Elf_Shdr *sechdrs;
char *secstrings, *args, *modmagic, *strtab = NULL;
+ char *staging;
unsigned int i;
unsigned int symindex = 0;
unsigned int strindex = 0;
- unsigned int setupindex;
- unsigned int exindex;
- unsigned int exportindex;
- unsigned int modindex;
- unsigned int obsparmindex;
- unsigned int infoindex;
- unsigned int gplindex;
- unsigned int crcindex;
- unsigned int gplcrcindex;
- unsigned int versindex;
- unsigned int pcpuindex;
- unsigned int gplfutureindex;
- unsigned int gplfuturecrcindex;
- unsigned int unwindex = 0;
-#ifdef CONFIG_UNUSED_SYMBOLS
- unsigned int unusedindex;
- unsigned int unusedcrcindex;
- unsigned int unusedgplindex;
- unsigned int unusedgplcrcindex;
-#endif
- unsigned int markersindex;
- unsigned int markersstringsindex;
- unsigned int tracepointsindex;
- unsigned int tracepointsstringsindex;
- unsigned int mcountindex;
+ unsigned int modindex, versindex, infoindex, pcpuindex;
+ unsigned int num_kp, num_mcount;
+ struct kernel_param *kp;
struct module *mod;
long err = 0;
void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
- struct exception_table_entry *extable;
+ unsigned long *mseg;
mm_segment_t old_fs;
DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
/* vmalloc barfs on "unusual" numbers. Check here */
if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL)
return ERR_PTR(-ENOMEM);
+
+ /* Create stop_machine threads since the error path relies on
+ * a non-failing stop_machine call. */
+ err = stop_machine_create();
+ if (err)
+ goto free_hdr;
+
if (copy_from_user(hdr, umod, len) != 0) {
err = -EFAULT;
goto free_hdr;
err = -ENOEXEC;
goto free_hdr;
}
+ /* This is temporary: point mod into copy of data. */
mod = (void *)sechdrs[modindex].sh_addr;
if (symindex == 0) {
goto free_hdr;
}
- /* Optional sections */
- exportindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab");
- gplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl");
- gplfutureindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl_future");
- crcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab");
- gplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl");
- gplfuturecrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl_future");
-#ifdef CONFIG_UNUSED_SYMBOLS
- unusedindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused");
- unusedgplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused_gpl");
- unusedcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused");
- unusedgplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused_gpl");
-#endif
- setupindex = find_sec(hdr, sechdrs, secstrings, "__param");
- exindex = find_sec(hdr, sechdrs, secstrings, "__ex_table");
- obsparmindex = find_sec(hdr, sechdrs, secstrings, "__obsparm");
versindex = find_sec(hdr, sechdrs, secstrings, "__versions");
infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo");
pcpuindex = find_pcpusec(hdr, sechdrs, secstrings);
-#ifdef ARCH_UNWIND_SECTION_NAME
- unwindex = find_sec(hdr, sechdrs, secstrings, ARCH_UNWIND_SECTION_NAME);
-#endif
/* Don't keep modinfo and version sections. */
sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
sechdrs[symindex].sh_flags |= SHF_ALLOC;
sechdrs[strindex].sh_flags |= SHF_ALLOC;
#endif
- if (unwindex)
- sechdrs[unwindex].sh_flags |= SHF_ALLOC;
/* Check module struct version now, before we try to use module. */
if (!check_modstruct_version(sechdrs, versindex, mod)) {
goto free_hdr;
}
+ staging = get_modinfo(sechdrs, infoindex, "staging");
+ if (staging) {
+ add_taint_module(mod, TAINT_CRAP);
+ printk(KERN_WARNING "%s: module is from the staging directory,"
+ " the quality is unknown, you have been warned.\n",
+ mod->name);
+ }
+
/* Now copy in args */
args = strndup_user(uargs, ~0UL >> 1);
if (IS_ERR(args)) {
/* Module has been moved. */
mod = (void *)sechdrs[modindex].sh_addr;
+#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
+ mod->refptr = percpu_modalloc(sizeof(local_t), __alignof__(local_t),
+ mod->name);
+ if (!mod->refptr) {
+ err = -ENOMEM;
+ goto free_init;
+ }
+#endif
/* Now we've moved module, initialize linked lists, etc. */
module_unload_init(mod);
if (err < 0)
goto cleanup;
- /* Set up EXPORTed & EXPORT_GPLed symbols (section 0 is 0 length) */
- mod->num_syms = sechdrs[exportindex].sh_size / sizeof(*mod->syms);
- mod->syms = (void *)sechdrs[exportindex].sh_addr;
- if (crcindex)
- mod->crcs = (void *)sechdrs[crcindex].sh_addr;
- mod->num_gpl_syms = sechdrs[gplindex].sh_size / sizeof(*mod->gpl_syms);
- mod->gpl_syms = (void *)sechdrs[gplindex].sh_addr;
- if (gplcrcindex)
- mod->gpl_crcs = (void *)sechdrs[gplcrcindex].sh_addr;
- mod->num_gpl_future_syms = sechdrs[gplfutureindex].sh_size /
- sizeof(*mod->gpl_future_syms);
- mod->gpl_future_syms = (void *)sechdrs[gplfutureindex].sh_addr;
- if (gplfuturecrcindex)
- mod->gpl_future_crcs = (void *)sechdrs[gplfuturecrcindex].sh_addr;
+ /* Now we've got everything in the final locations, we can
+ * find optional sections. */
+ kp = section_objs(hdr, sechdrs, secstrings, "__param", sizeof(*kp),
+ &num_kp);
+ mod->syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab",
+ sizeof(*mod->syms), &mod->num_syms);
+ mod->crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab");
+ mod->gpl_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_gpl",
+ sizeof(*mod->gpl_syms),
+ &mod->num_gpl_syms);
+ mod->gpl_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_gpl");
+ mod->gpl_future_syms = section_objs(hdr, sechdrs, secstrings,
+ "__ksymtab_gpl_future",
+ sizeof(*mod->gpl_future_syms),
+ &mod->num_gpl_future_syms);
+ mod->gpl_future_crcs = section_addr(hdr, sechdrs, secstrings,
+ "__kcrctab_gpl_future");
#ifdef CONFIG_UNUSED_SYMBOLS
- mod->num_unused_syms = sechdrs[unusedindex].sh_size /
- sizeof(*mod->unused_syms);
- mod->num_unused_gpl_syms = sechdrs[unusedgplindex].sh_size /
- sizeof(*mod->unused_gpl_syms);
- mod->unused_syms = (void *)sechdrs[unusedindex].sh_addr;
- if (unusedcrcindex)
- mod->unused_crcs = (void *)sechdrs[unusedcrcindex].sh_addr;
- mod->unused_gpl_syms = (void *)sechdrs[unusedgplindex].sh_addr;
- if (unusedgplcrcindex)
- mod->unused_gpl_crcs
- = (void *)sechdrs[unusedgplcrcindex].sh_addr;
+ mod->unused_syms = section_objs(hdr, sechdrs, secstrings,
+ "__ksymtab_unused",
+ sizeof(*mod->unused_syms),
+ &mod->num_unused_syms);
+ mod->unused_crcs = section_addr(hdr, sechdrs, secstrings,
+ "__kcrctab_unused");
+ mod->unused_gpl_syms = section_objs(hdr, sechdrs, secstrings,
+ "__ksymtab_unused_gpl",
+ sizeof(*mod->unused_gpl_syms),
+ &mod->num_unused_gpl_syms);
+ mod->unused_gpl_crcs = section_addr(hdr, sechdrs, secstrings,
+ "__kcrctab_unused_gpl");
+#endif
+
+#ifdef CONFIG_MARKERS
+ mod->markers = section_objs(hdr, sechdrs, secstrings, "__markers",
+ sizeof(*mod->markers), &mod->num_markers);
+#endif
+#ifdef CONFIG_TRACEPOINTS
+ mod->tracepoints = section_objs(hdr, sechdrs, secstrings,
+ "__tracepoints",
+ sizeof(*mod->tracepoints),
+ &mod->num_tracepoints);
#endif
#ifdef CONFIG_MODVERSIONS
- if ((mod->num_syms && !crcindex)
- || (mod->num_gpl_syms && !gplcrcindex)
- || (mod->num_gpl_future_syms && !gplfuturecrcindex)
+ if ((mod->num_syms && !mod->crcs)
+ || (mod->num_gpl_syms && !mod->gpl_crcs)
+ || (mod->num_gpl_future_syms && !mod->gpl_future_crcs)
#ifdef CONFIG_UNUSED_SYMBOLS
- || (mod->num_unused_syms && !unusedcrcindex)
- || (mod->num_unused_gpl_syms && !unusedgplcrcindex)
+ || (mod->num_unused_syms && !mod->unused_crcs)
+ || (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs)
#endif
) {
printk(KERN_WARNING "%s: No versions for exported symbols.\n", mod->name);
goto cleanup;
}
#endif
- markersindex = find_sec(hdr, sechdrs, secstrings, "__markers");
- markersstringsindex = find_sec(hdr, sechdrs, secstrings,
- "__markers_strings");
- tracepointsindex = find_sec(hdr, sechdrs, secstrings, "__tracepoints");
- tracepointsstringsindex = find_sec(hdr, sechdrs, secstrings,
- "__tracepoints_strings");
-
- mcountindex = find_sec(hdr, sechdrs, secstrings,
- "__mcount_loc");
/* Now do relocations. */
for (i = 1; i < hdr->e_shnum; i++) {
if (err < 0)
goto cleanup;
}
-#ifdef CONFIG_MARKERS
- mod->markers = (void *)sechdrs[markersindex].sh_addr;
- mod->num_markers =
- sechdrs[markersindex].sh_size / sizeof(*mod->markers);
-#endif
-#ifdef CONFIG_TRACEPOINTS
- mod->tracepoints = (void *)sechdrs[tracepointsindex].sh_addr;
- mod->num_tracepoints =
- sechdrs[tracepointsindex].sh_size / sizeof(*mod->tracepoints);
-#endif
-
/* Find duplicate symbols */
err = verify_export_symbols(mod);
-
if (err < 0)
goto cleanup;
/* Set up and sort exception table */
- mod->num_exentries = sechdrs[exindex].sh_size / sizeof(*mod->extable);
- mod->extable = extable = (void *)sechdrs[exindex].sh_addr;
- sort_extable(extable, extable + mod->num_exentries);
+ mod->extable = section_objs(hdr, sechdrs, secstrings, "__ex_table",
+ sizeof(*mod->extable), &mod->num_exentries);
+ sort_extable(mod->extable, mod->extable + mod->num_exentries);
/* Finally, copy percpu area over. */
percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr,
add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
if (!mod->taints) {
-#ifdef CONFIG_MARKERS
- marker_update_probe_range(mod->markers,
- mod->markers + mod->num_markers);
-#endif
-#ifdef CONFIG_TRACEPOINTS
- tracepoint_update_probe_range(mod->tracepoints,
- mod->tracepoints + mod->num_tracepoints);
-#endif
- }
+ struct mod_debug *debug;
+ unsigned int num_debug;
- if (mcountindex) {
- void *mseg = (void *)sechdrs[mcountindex].sh_addr;
- ftrace_init_module(mseg, mseg + sechdrs[mcountindex].sh_size);
+ debug = section_objs(hdr, sechdrs, secstrings, "__verbose",
+ sizeof(*debug), &num_debug);
+ dynamic_printk_setup(debug, num_debug);
}
+ /* sechdrs[0].sh_size is always zero */
+ mseg = section_objs(hdr, sechdrs, secstrings, "__mcount_loc",
+ sizeof(*mseg), &num_mcount);
+ ftrace_init_module(mod, mseg, mseg + num_mcount);
+
err = module_finalize(hdr, sechdrs, mod);
if (err < 0)
goto cleanup;
set_fs(old_fs);
mod->args = args;
- if (obsparmindex)
+ if (section_addr(hdr, sechdrs, secstrings, "__obsparm"))
printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
mod->name);
/* Now sew it into the lists so we can get lockdep and oops
- * info during argument parsing. Noone should access us, since
- * strong_try_module_get() will fail. */
- stop_machine(__link_module, mod, NULL);
-
- /* Size of section 0 is 0, so this works well if no params */
- err = parse_args(mod->name, mod->args,
- (struct kernel_param *)
- sechdrs[setupindex].sh_addr,
- sechdrs[setupindex].sh_size
- / sizeof(struct kernel_param),
- NULL);
+ * info during argument parsing. Noone should access us, since
+ * strong_try_module_get() will fail.
+ * lockdep/oops can run asynchronous, so use the RCU list insertion
+ * function to insert in a way safe to concurrent readers.
+ * The mutex protects against concurrent writers.
+ */
+ list_add_rcu(&mod->list, &modules);
+
+ err = parse_args(mod->name, mod->args, kp, num_kp, NULL);
if (err < 0)
goto unlink;
- err = mod_sysfs_setup(mod,
- (struct kernel_param *)
- sechdrs[setupindex].sh_addr,
- sechdrs[setupindex].sh_size
- / sizeof(struct kernel_param));
+ err = mod_sysfs_setup(mod, kp, num_kp);
if (err < 0)
goto unlink;
add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
- /* Size of section 0 is 0, so this works well if no unwind info. */
- mod->unwind_info = unwind_add_table(mod,
- (void *)sechdrs[unwindex].sh_addr,
- sechdrs[unwindex].sh_size);
-
/* Get rid of temporary copy */
vfree(hdr);
+ stop_machine_destroy();
/* Done! */
return mod;
cleanup:
kobject_del(&mod->mkobj.kobj);
kobject_put(&mod->mkobj.kobj);
+ ftrace_release(mod->module_core, mod->core_size);
free_unload:
module_unload_free(mod);
+ free_init:
+#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
+ percpu_modfree(mod->refptr);
+#endif
module_free(mod, mod->module_init);
free_core:
module_free(mod, mod->module_core);
+ /* mod will be freed with core. Don't access it beyond this line! */
free_percpu:
if (percpu)
percpu_modfree(percpu);
kfree(args);
free_hdr:
vfree(hdr);
+ stop_machine_destroy();
return ERR_PTR(err);
truncated:
}
/* This is where the real work happens */
-asmlinkage long
-sys_init_module(void __user *umod,
- unsigned long len,
- const char __user *uargs)
+SYSCALL_DEFINE3(init_module, void __user *, umod,
+ unsigned long, len, const char __user *, uargs)
{
struct module *mod;
int ret = 0;
/* Now it's a first class citizen! Wake up anyone waiting for it. */
mod->state = MODULE_STATE_LIVE;
wake_up(&module_wq);
+ blocking_notifier_call_chain(&module_notify_list,
+ MODULE_STATE_LIVE, mod);
mutex_lock(&module_mutex);
/* Drop initial reference. */
module_put(mod);
- unwind_remove_table(mod->unwind_info, 1);
module_free(mod, mod->module_init);
mod->module_init = NULL;
mod->init_size = 0;
unsigned long nextval;
/* At worse, next value is at end of module */
- if (within(addr, mod->module_init, mod->init_size))
+ if (within_module_init(addr, mod))
nextval = (unsigned long)mod->module_init+mod->init_text_size;
else
nextval = (unsigned long)mod->module_core+mod->core_text_size;
const char *ret = NULL;
preempt_disable();
- list_for_each_entry(mod, &modules, list) {
- if (within(addr, mod->module_init, mod->init_size)
- || within(addr, mod->module_core, mod->core_size)) {
+ list_for_each_entry_rcu(mod, &modules, list) {
+ if (within_module_init(addr, mod) ||
+ within_module_core(addr, mod)) {
if (modname)
*modname = mod->name;
ret = get_ksymbol(mod, addr, size, offset);
struct module *mod;
preempt_disable();
- list_for_each_entry(mod, &modules, list) {
- if (within(addr, mod->module_init, mod->init_size) ||
- within(addr, mod->module_core, mod->core_size)) {
+ list_for_each_entry_rcu(mod, &modules, list) {
+ if (within_module_init(addr, mod) ||
+ within_module_core(addr, mod)) {
const char *sym;
sym = get_ksymbol(mod, addr, NULL, NULL);
struct module *mod;
preempt_disable();
- list_for_each_entry(mod, &modules, list) {
- if (within(addr, mod->module_init, mod->init_size) ||
- within(addr, mod->module_core, mod->core_size)) {
+ list_for_each_entry_rcu(mod, &modules, list) {
+ if (within_module_init(addr, mod) ||
+ within_module_core(addr, mod)) {
const char *sym;
sym = get_ksymbol(mod, addr, size, offset);
struct module *mod;
preempt_disable();
- list_for_each_entry(mod, &modules, list) {
+ list_for_each_entry_rcu(mod, &modules, list) {
if (symnum < mod->num_symtab) {
*value = mod->symtab[symnum].st_value;
*type = mod->symtab[symnum].st_info;
strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
KSYM_NAME_LEN);
strlcpy(module_name, mod->name, MODULE_NAME_LEN);
- *exported = is_exported(name, mod);
+ *exported = is_exported(name, *value, mod);
preempt_enable();
return 0;
}
ret = mod_find_symname(mod, colon+1);
*colon = ':';
} else {
- list_for_each_entry(mod, &modules, list)
+ list_for_each_entry_rcu(mod, &modules, list)
if ((ret = mod_find_symname(mod, name)) != 0)
break;
}
}
#endif /* CONFIG_KALLSYMS */
-/* Called by the /proc file system to return a list of modules. */
-static void *m_start(struct seq_file *m, loff_t *pos)
-{
- mutex_lock(&module_mutex);
- return seq_list_start(&modules, *pos);
-}
-
-static void *m_next(struct seq_file *m, void *p, loff_t *pos)
-{
- return seq_list_next(p, &modules, pos);
-}
-
-static void m_stop(struct seq_file *m, void *p)
-{
- mutex_unlock(&module_mutex);
-}
-
static char *module_flags(struct module *mod, char *buf)
{
int bx = 0;
mod->state == MODULE_STATE_GOING ||
mod->state == MODULE_STATE_COMING) {
buf[bx++] = '(';
- if (mod->taints & TAINT_PROPRIETARY_MODULE)
+ if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE))
buf[bx++] = 'P';
- if (mod->taints & TAINT_FORCED_MODULE)
+ if (mod->taints & (1 << TAINT_FORCED_MODULE))
buf[bx++] = 'F';
+ if (mod->taints & (1 << TAINT_CRAP))
+ buf[bx++] = 'C';
/*
* TAINT_FORCED_RMMOD: could be added.
* TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
return buf;
}
+#ifdef CONFIG_PROC_FS
+/* Called by the /proc file system to return a list of modules. */
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+ mutex_lock(&module_mutex);
+ return seq_list_start(&modules, *pos);
+}
+
+static void *m_next(struct seq_file *m, void *p, loff_t *pos)
+{
+ return seq_list_next(p, &modules, pos);
+}
+
+static void m_stop(struct seq_file *m, void *p)
+{
+ mutex_unlock(&module_mutex);
+}
+
static int m_show(struct seq_file *m, void *p)
{
struct module *mod = list_entry(p, struct module, list);
Where refcount is a number or -, and deps is a comma-separated list
of depends or -.
*/
-const struct seq_operations modules_op = {
+static const struct seq_operations modules_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
.show = m_show
};
+static int modules_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &modules_op);
+}
+
+static const struct file_operations proc_modules_operations = {
+ .open = modules_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int __init proc_modules_init(void)
+{
+ proc_create("modules", 0, NULL, &proc_modules_operations);
+ return 0;
+}
+module_init(proc_modules_init);
+#endif
+
/* Given an address, look for it in the module exception tables. */
const struct exception_table_entry *search_module_extables(unsigned long addr)
{
struct module *mod;
preempt_disable();
- list_for_each_entry(mod, &modules, list) {
+ list_for_each_entry_rcu(mod, &modules, list) {
if (mod->num_exentries == 0)
continue;
preempt_disable();
- list_for_each_entry(mod, &modules, list) {
- if (within(addr, mod->module_core, mod->core_size)) {
+ list_for_each_entry_rcu(mod, &modules, list) {
+ if (within_module_core(addr, mod)) {
preempt_enable();
return 1;
}
/* Is this a valid kernel address? */
-struct module *__module_text_address(unsigned long addr)
+__notrace_funcgraph struct module *__module_text_address(unsigned long addr)
{
struct module *mod;
if (addr < module_addr_min || addr > module_addr_max)
return NULL;
- list_for_each_entry(mod, &modules, list)
+ list_for_each_entry_rcu(mod, &modules, list)
if (within(addr, mod->module_init, mod->init_text_size)
|| within(addr, mod->module_core, mod->core_text_size))
return mod;
char buf[8];
printk("Modules linked in:");
- list_for_each_entry(mod, &modules, list)
+ /* Most callers should already have preempt disabled, but make sure */
+ preempt_disable();
+ list_for_each_entry_rcu(mod, &modules, list)
printk(" %s%s", mod->name, module_flags(mod, buf));
+ preempt_enable();
if (last_unloaded_module[0])
printk(" [last unloaded: %s]", last_unloaded_module);
printk("\n");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff