Initial import

1 files changed, 658 insertions, 0 deletions

diff --git a/include/linux/module.h b/include/linux/module.h
new file mode 100644
index 000000000..c883b86ea
--- /dev/null
+++ b/include/linux/module.h
@@ -0,0 +1,658 @@
+#ifndef _LINUX_MODULE_H
+#define _LINUX_MODULE_H
+/*
+ * Dynamic loading of modules into the kernel.
+ *
+ * Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996
+ * Rewritten again by Rusty Russell, 2002
+ */
+#include <linux/list.h>
+#include <linux/stat.h>
+#include <linux/compiler.h>
+#include <linux/cache.h>
+#include <linux/kmod.h>
+#include <linux/elf.h>
+#include <linux/stringify.h>
+#include <linux/kobject.h>
+#include <linux/moduleparam.h>
+#include <linux/jump_label.h>
+#include <linux/export.h>
+
+#include <linux/percpu.h>
+#include <asm/module.h>
+
+/* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
+#define MODULE_SIG_STRING "~Module signature appended~\n"
+
+/* Not Yet Implemented */
+#define MODULE_SUPPORTED_DEVICE(name)
+
+#define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
+
+struct modversion_info {
+	unsigned long crc;
+	char name[MODULE_NAME_LEN];
+};
+
+struct module;
+
+struct module_kobject {
+	struct kobject kobj;
+	struct module *mod;
+	struct kobject *drivers_dir;
+	struct module_param_attrs *mp;
+	struct completion *kobj_completion;
+};
+
+struct module_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct module_attribute *, struct module_kobject *,
+			char *);
+	ssize_t (*store)(struct module_attribute *, struct module_kobject *,
+			 const char *, size_t count);
+	void (*setup)(struct module *, const char *);
+	int (*test)(struct module *);
+	void (*free)(struct module *);
+};
+
+struct module_version_attribute {
+	struct module_attribute mattr;
+	const char *module_name;
+	const char *version;
+} __attribute__ ((__aligned__(sizeof(void *))));
+
+extern ssize_t __modver_version_show(struct module_attribute *,
+				     struct module_kobject *, char *);
+
+extern struct module_attribute module_uevent;
+
+/* These are either module local, or the kernel's dummy ones. */
+extern int init_module(void);
+extern void cleanup_module(void);
+
+/* Archs provide a method of finding the correct exception table. */
+struct exception_table_entry;
+
+const struct exception_table_entry *
+search_extable(const struct exception_table_entry *first,
+	       const struct exception_table_entry *last,
+	       unsigned long value);
+void sort_extable(struct exception_table_entry *start,
+		  struct exception_table_entry *finish);
+void sort_main_extable(void);
+void trim_init_extable(struct module *m);
+
+/* Generic info of form tag = "info" */
+#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
+
+/* For userspace: you can also call me... */
+#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
+
+/* Soft module dependencies. See man modprobe.d for details.
+ * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz")
+ */
+#define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
+
+/*
+ * The following license idents are currently accepted as indicating free
+ * software modules
+ *
+ *	"GPL"				[GNU Public License v2 or later]
+ *	"GPL v2"			[GNU Public License v2]
+ *	"GPL and additional rights"	[GNU Public License v2 rights and more]
+ *	"Dual BSD/GPL"			[GNU Public License v2
+ *					 or BSD license choice]
+ *	"Dual MIT/GPL"			[GNU Public License v2
+ *					 or MIT license choice]
+ *	"Dual MPL/GPL"			[GNU Public License v2
+ *					 or Mozilla license choice]
+ *
+ * The following other idents are available
+ *
+ *	"Proprietary"			[Non free products]
+ *
+ * There are dual licensed components, but when running with Linux it is the
+ * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL
+ * is a GPL combined work.
+ *
+ * This exists for several reasons
+ * 1.	So modinfo can show license info for users wanting to vet their setup
+ *	is free
+ * 2.	So the community can ignore bug reports including proprietary modules
+ * 3.	So vendors can do likewise based on their own policies
+ */
+#define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
+
+/*
+ * Author(s), use "Name <email>" or just "Name", for multiple
+ * authors use multiple MODULE_AUTHOR() statements/lines.
+ */
+#define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
+
+/* What your module does. */
+#define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
+
+#ifdef MODULE
+/* Creates an alias so file2alias.c can find device table. */
+#define MODULE_DEVICE_TABLE(type, name)					\
+extern const typeof(name) __mod_##type##__##name##_device_table		\
+  __attribute__ ((unused, alias(__stringify(name))))
+#else  /* !MODULE */
+#define MODULE_DEVICE_TABLE(type, name)
+#endif
+
+/* Version of form [<epoch>:]<version>[-<extra-version>].
+ * Or for CVS/RCS ID version, everything but the number is stripped.
+ * <epoch>: A (small) unsigned integer which allows you to start versions
+ * anew. If not mentioned, it's zero.  eg. "2:1.0" is after
+ * "1:2.0".
+
+ * <version>: The <version> may contain only alphanumerics and the
+ * character `.'.  Ordered by numeric sort for numeric parts,
+ * ascii sort for ascii parts (as per RPM or DEB algorithm).
+
+ * <extraversion>: Like <version>, but inserted for local
+ * customizations, eg "rh3" or "rusty1".
+
+ * Using this automatically adds a checksum of the .c files and the
+ * local headers in "srcversion".
+ */
+
+#if defined(MODULE) || !defined(CONFIG_SYSFS)
+#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
+#else
+#define MODULE_VERSION(_version)					\
+	static struct module_version_attribute ___modver_attr = {	\
+		.mattr	= {						\
+			.attr	= {					\
+				.name	= "version",			\
+				.mode	= S_IRUGO,			\
+			},						\
+			.show	= __modver_version_show,		\
+		},							\
+		.module_name	= KBUILD_MODNAME,			\
+		.version	= _version,				\
+	};								\
+	static const struct module_version_attribute			\
+	__used __attribute__ ((__section__ ("__modver")))		\
+	* __moduleparam_const __modver_attr = &___modver_attr
+#endif
+
+/* Optional firmware file (or files) needed by the module
+ * format is simply firmware file name.  Multiple firmware
+ * files require multiple MODULE_FIRMWARE() specifiers */
+#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
+
+/* Given an address, look for it in the exception tables */
+const struct exception_table_entry *search_exception_tables(unsigned long add);
+
+struct notifier_block;
+
+#ifdef CONFIG_MODULES
+
+extern int modules_disabled; /* for sysctl */
+/* Get/put a kernel symbol (calls must be symmetric) */
+void *__symbol_get(const char *symbol);
+void *__symbol_get_gpl(const char *symbol);
+#define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x))))
+
+/* modules using other modules: kdb wants to see this. */
+struct module_use {
+	struct list_head source_list;
+	struct list_head target_list;
+	struct module *source, *target;
+};
+
+enum module_state {
+	MODULE_STATE_LIVE,	/* Normal state. */
+	MODULE_STATE_COMING,	/* Full formed, running module_init. */
+	MODULE_STATE_GOING,	/* Going away. */
+	MODULE_STATE_UNFORMED,	/* Still setting it up. */
+};
+
+struct module {
+	enum module_state state;
+
+	/* Member of list of modules */
+	struct list_head list;
+
+	/* Unique handle for this module */
+	char name[MODULE_NAME_LEN];
+
+	/* Sysfs stuff. */
+	struct module_kobject mkobj;
+	struct module_attribute *modinfo_attrs;
+	const char *version;
+	const char *srcversion;
+	struct kobject *holders_dir;
+
+	/* Exported symbols */
+	const struct kernel_symbol *syms;
+	const unsigned long *crcs;
+	unsigned int num_syms;
+
+	/* Kernel parameters. */
+	struct kernel_param *kp;
+	unsigned int num_kp;
+
+	/* GPL-only exported symbols. */
+	unsigned int num_gpl_syms;
+	const struct kernel_symbol *gpl_syms;
+	const unsigned long *gpl_crcs;
+
+#ifdef CONFIG_UNUSED_SYMBOLS
+	/* unused exported symbols. */
+	const struct kernel_symbol *unused_syms;
+	const unsigned long *unused_crcs;
+	unsigned int num_unused_syms;
+
+	/* GPL-only, unused exported symbols. */
+	unsigned int num_unused_gpl_syms;
+	const struct kernel_symbol *unused_gpl_syms;
+	const unsigned long *unused_gpl_crcs;
+#endif
+
+#ifdef CONFIG_MODULE_SIG
+	/* Signature was verified. */
+	bool sig_ok;
+#endif
+
+	/* symbols that will be GPL-only in the near future. */
+	const struct kernel_symbol *gpl_future_syms;
+	const unsigned long *gpl_future_crcs;
+	unsigned int num_gpl_future_syms;
+
+	/* Exception table */
+	unsigned int num_exentries;
+	struct exception_table_entry *extable;
+
+	/* Startup function. */
+	int (*init)(void);
+
+	/* If this is non-NULL, vfree after init() returns */
+	void *module_init;
+
+	/* Here is the actual code + data, vfree'd on unload. */
+	void *module_core;
+
+	/* Here are the sizes of the init and core sections */
+	unsigned int init_size, core_size;
+
+	/* The size of the executable code in each section.  */
+	unsigned int init_text_size, core_text_size;
+
+	/* Size of RO sections of the module (text+rodata) */
+	unsigned int init_ro_size, core_ro_size;
+
+	/* Arch-specific module values */
+	struct mod_arch_specific arch;
+
+	unsigned int taints;	/* same bits as kernel:tainted */
+
+#ifdef CONFIG_GENERIC_BUG
+	/* Support for BUG */
+	unsigned num_bugs;
+	struct list_head bug_list;
+	struct bug_entry *bug_table;
+#endif
+
+#ifdef CONFIG_KALLSYMS
+	/*
+	 * We keep the symbol and string tables for kallsyms.
+	 * The core_* fields below are temporary, loader-only (they
+	 * could really be discarded after module init).
+	 */
+	Elf_Sym *symtab, *core_symtab;
+	unsigned int num_symtab, core_num_syms;
+	char *strtab, *core_strtab;
+
+	/* Section attributes */
+	struct module_sect_attrs *sect_attrs;
+
+	/* Notes attributes */
+	struct module_notes_attrs *notes_attrs;
+#endif
+
+	/* The command line arguments (may be mangled).  People like
+	   keeping pointers to this stuff */
+	char *args;
+
+#ifdef CONFIG_SMP
+	/* Per-cpu data. */
+	void __percpu *percpu;
+	unsigned int percpu_size;
+#endif
+
+#ifdef CONFIG_TRACEPOINTS
+	unsigned int num_tracepoints;
+	struct tracepoint * const *tracepoints_ptrs;
+#endif
+#ifdef HAVE_JUMP_LABEL
+	struct jump_entry *jump_entries;
+	unsigned int num_jump_entries;
+#endif
+#ifdef CONFIG_TRACING
+	unsigned int num_trace_bprintk_fmt;
+	const char **trace_bprintk_fmt_start;
+#endif
+#ifdef CONFIG_EVENT_TRACING
+	struct ftrace_event_call **trace_events;
+	unsigned int num_trace_events;
+	struct trace_enum_map **trace_enums;
+	unsigned int num_trace_enums;
+#endif
+#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+	unsigned int num_ftrace_callsites;
+	unsigned long *ftrace_callsites;
+#endif
+
+#ifdef CONFIG_LIVEPATCH
+	bool klp_alive;
+#endif
+
+#ifdef CONFIG_MODULE_UNLOAD
+	/* What modules depend on me? */
+	struct list_head source_list;
+	/* What modules do I depend on? */
+	struct list_head target_list;
+
+	/* Destruction function. */
+	void (*exit)(void);
+
+	atomic_t refcnt;
+#endif
+
+#ifdef CONFIG_CONSTRUCTORS
+	/* Constructor functions. */
+	ctor_fn_t *ctors;
+	unsigned int num_ctors;
+#endif
+};
+#ifndef MODULE_ARCH_INIT
+#define MODULE_ARCH_INIT {}
+#endif
+
+extern struct mutex module_mutex;
+
+/* FIXME: It'd be nice to isolate modules during init, too, so they
+   aren't used before they (may) fail.  But presently too much code
+   (IDE & SCSI) require entry into the module during init.*/
+static inline int module_is_live(struct module *mod)
+{
+	return mod->state != MODULE_STATE_GOING;
+}
+
+struct module *__module_text_address(unsigned long addr);
+struct module *__module_address(unsigned long addr);
+bool is_module_address(unsigned long addr);
+bool is_module_percpu_address(unsigned long addr);
+bool is_module_text_address(unsigned long addr);
+
+static inline bool within_module_core(unsigned long addr,
+				      const struct module *mod)
+{
+	return (unsigned long)mod->module_core <= addr &&
+	       addr < (unsigned long)mod->module_core + mod->core_size;
+}
+
+static inline bool within_module_init(unsigned long addr,
+				      const struct module *mod)
+{
+	return (unsigned long)mod->module_init <= addr &&
+	       addr < (unsigned long)mod->module_init + mod->init_size;
+}
+
+static inline bool within_module(unsigned long addr, const struct module *mod)
+{
+	return within_module_init(addr, mod) || within_module_core(addr, mod);
+}
+
+/* Search for module by name: must hold module_mutex. */
+struct module *find_module(const char *name);
+
+struct symsearch {
+	const struct kernel_symbol *start, *stop;
+	const unsigned long *crcs;
+	enum {
+		NOT_GPL_ONLY,
+		GPL_ONLY,
+		WILL_BE_GPL_ONLY,
+	} licence;
+	bool unused;
+};
+
+/* Search for an exported symbol by name. */
+const struct kernel_symbol *find_symbol(const char *name,
+					struct module **owner,
+					const unsigned long **crc,
+					bool gplok,
+					bool warn);
+
+/* Walk the exported symbol table */
+bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
+				    struct module *owner,
+				    void *data), void *data);
+
+/* Returns 0 and fills in value, defined and namebuf, or -ERANGE if
+   symnum out of range. */
+int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
+			char *name, char *module_name, int *exported);
+
+/* Look for this name: can be of form module:name. */
+unsigned long module_kallsyms_lookup_name(const char *name);
+
+int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+					     struct module *, unsigned long),
+				   void *data);
+
+extern void __module_put_and_exit(struct module *mod, long code)
+	__attribute__((noreturn));
+#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
+
+#ifdef CONFIG_MODULE_UNLOAD
+int module_refcount(struct module *mod);
+void __symbol_put(const char *symbol);
+#define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x))
+void symbol_put_addr(void *addr);
+
+/* Sometimes we know we already have a refcount, and it's easier not
+   to handle the error case (which only happens with rmmod --wait). */
+extern void __module_get(struct module *module);
+
+/* This is the Right Way to get a module: if it fails, it's being removed,
+ * so pretend it's not there. */
+extern bool try_module_get(struct module *module);
+
+extern void module_put(struct module *module);
+
+#else /*!CONFIG_MODULE_UNLOAD*/
+static inline int try_module_get(struct module *module)
+{
+	return !module || module_is_live(module);
+}
+static inline void module_put(struct module *module)
+{
+}
+static inline void __module_get(struct module *module)
+{
+}
+#define symbol_put(x) do { } while (0)
+#define symbol_put_addr(p) do { } while (0)
+
+#endif /* CONFIG_MODULE_UNLOAD */
+int ref_module(struct module *a, struct module *b);
+
+/* This is a #define so the string doesn't get put in every .o file */
+#define module_name(mod)			\
+({						\
+	struct module *__mod = (mod);		\
+	__mod ? __mod->name : "kernel";		\
+})
+
+/* For kallsyms to ask for address resolution.  namebuf should be at
+ * least KSYM_NAME_LEN long: a pointer to namebuf is returned if
+ * found, otherwise NULL. */
+const char *module_address_lookup(unsigned long addr,
+			    unsigned long *symbolsize,
+			    unsigned long *offset,
+			    char **modname,
+			    char *namebuf);
+int lookup_module_symbol_name(unsigned long addr, char *symname);
+int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
+
+/* For extable.c to search modules' exception tables. */
+const struct exception_table_entry *search_module_extables(unsigned long addr);
+
+int register_module_notifier(struct notifier_block *nb);
+int unregister_module_notifier(struct notifier_block *nb);
+
+extern void print_modules(void);
+
+#else /* !CONFIG_MODULES... */
+
+/* Given an address, look for it in the exception tables. */
+static inline const struct exception_table_entry *
+search_module_extables(unsigned long addr)
+{
+	return NULL;
+}
+
+static inline struct module *__module_address(unsigned long addr)
+{
+	return NULL;
+}
+
+static inline struct module *__module_text_address(unsigned long addr)
+{
+	return NULL;
+}
+
+static inline bool is_module_address(unsigned long addr)
+{
+	return false;
+}
+
+static inline bool is_module_percpu_address(unsigned long addr)
+{
+	return false;
+}
+
+static inline bool is_module_text_address(unsigned long addr)
+{
+	return false;
+}
+
+/* Get/put a kernel symbol (calls should be symmetric) */
+#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
+#define symbol_put(x) do { } while (0)
+#define symbol_put_addr(x) do { } while (0)
+
+static inline void __module_get(struct module *module)
+{
+}
+
+static inline int try_module_get(struct module *module)
+{
+	return 1;
+}
+
+static inline void module_put(struct module *module)
+{
+}
+
+#define module_name(mod) "kernel"
+
+/* For kallsyms to ask for address resolution.  NULL means not found. */
+static inline const char *module_address_lookup(unsigned long addr,
+					  unsigned long *symbolsize,
+					  unsigned long *offset,
+					  char **modname,
+					  char *namebuf)
+{
+	return NULL;
+}
+
+static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
+{
+	return -ERANGE;
+}
+
+static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
+{
+	return -ERANGE;
+}
+
+static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
+					char *type, char *name,
+					char *module_name, int *exported)
+{
+	return -ERANGE;
+}
+
+static inline unsigned long module_kallsyms_lookup_name(const char *name)
+{
+	return 0;
+}
+
+static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+							   struct module *,
+							   unsigned long),
+						 void *data)
+{
+	return 0;
+}
+
+static inline int register_module_notifier(struct notifier_block *nb)
+{
+	/* no events will happen anyway, so this can always succeed */
+	return 0;
+}
+
+static inline int unregister_module_notifier(struct notifier_block *nb)
+{
+	return 0;
+}
+
+#define module_put_and_exit(code) do_exit(code)
+
+static inline void print_modules(void)
+{
+}
+#endif /* CONFIG_MODULES */
+
+#ifdef CONFIG_SYSFS
+extern struct kset *module_kset;
+extern struct kobj_type module_ktype;
+extern int module_sysfs_initialized;
+#endif /* CONFIG_SYSFS */
+
+#define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)
+
+/* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */
+
+#define __MODULE_STRING(x) __stringify(x)
+
+#ifdef CONFIG_DEBUG_SET_MODULE_RONX
+extern void set_all_modules_text_rw(void);
+extern void set_all_modules_text_ro(void);
+#else
+static inline void set_all_modules_text_rw(void) { }
+static inline void set_all_modules_text_ro(void) { }
+#endif
+
+#ifdef CONFIG_GENERIC_BUG
+void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
+			 struct module *);
+void module_bug_cleanup(struct module *);
+
+#else	/* !CONFIG_GENERIC_BUG */
+
+static inline void module_bug_finalize(const Elf_Ehdr *hdr,
+					const Elf_Shdr *sechdrs,
+					struct module *mod)
+{
+}
+static inline void module_bug_cleanup(struct module *mod) {}
+#endif	/* CONFIG_GENERIC_BUG */
+
+#endif /* _LINUX_MODULE_H */