1 #ifndef _LINUX_MODULE_H 2 #define _LINUX_MODULE_H 3 /* 4 * Dynamic loading of modules into the kernel. 5 * 6 * Rewritten by Richard Henderson <[email protected]> Dec 1996 7 * Rewritten again by Rusty Russell, 2002 8 */ 9 #include <linux/list.h> 10 #include <linux/stat.h> 11 #include <linux/compiler.h> 12 #include <linux/cache.h> 13 #include <linux/kmod.h> 14 #include <linux/init.h> 15 #include <linux/elf.h> 16 #include <linux/stringify.h> 17 #include <linux/kobject.h> 18 #include <linux/moduleparam.h> 19 #include <linux/jump_label.h> 20 #include <linux/export.h> 21 #include <linux/rbtree_latch.h> 22 23 #include <linux/percpu.h> 24 #include <asm/module.h> 25 26 /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */ 27 #define MODULE_SIG_STRING "~Module signature appended~\n" 28 29 /* Not Yet Implemented */ 30 #define MODULE_SUPPORTED_DEVICE(name) 31 32 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN 33 34 struct modversion_info { 35 unsigned long crc; 36 char name[MODULE_NAME_LEN]; 37 }; 38 39 struct module; 40 struct exception_table_entry; 41 42 struct module_kobject { 43 struct kobject kobj; 44 struct module *mod; 45 struct kobject *drivers_dir; 46 struct module_param_attrs *mp; 47 struct completion *kobj_completion; 48 } __randomize_layout; 49 50 struct module_attribute { 51 struct attribute attr; 52 ssize_t (*show)(struct module_attribute *, struct module_kobject *, 53 char *); 54 ssize_t (*store)(struct module_attribute *, struct module_kobject *, 55 const char *, size_t count); 56 void (*setup)(struct module *, const char *); 57 int (*test)(struct module *); 58 void (*free)(struct module *); 59 }; 60 61 struct module_version_attribute { 62 struct module_attribute mattr; 63 const char *module_name; 64 const char *version; 65 } __attribute__ ((__aligned__(sizeof(void *)))); 66 67 extern ssize_t __modver_version_show(struct module_attribute *, 68 struct module_kobject *, char *); 69 70 extern struct module_attribute module_uevent; 71 72 /* These are either module local, or the kernel's dummy ones. */ 73 extern int init_module(void); 74 extern void cleanup_module(void); 75 76 #ifndef MODULE 77 /** 78 * module_init() - driver initialization entry point 79 * @x: function to be run at kernel boot time or module insertion 80 * 81 * module_init() will either be called during do_initcalls() (if 82 * builtin) or at module insertion time (if a module). There can only 83 * be one per module. 84 */ 85 #define module_init(x) __initcall(x); 86 87 /** 88 * module_exit() - driver exit entry point 89 * @x: function to be run when driver is removed 90 * 91 * module_exit() will wrap the driver clean-up code 92 * with cleanup_module() when used with rmmod when 93 * the driver is a module. If the driver is statically 94 * compiled into the kernel, module_exit() has no effect. 95 * There can only be one per module. 96 */ 97 #define module_exit(x) __exitcall(x); 98 99 #else /* MODULE */ 100 101 /* 102 * In most cases loadable modules do not need custom 103 * initcall levels. There are still some valid cases where 104 * a driver may be needed early if built in, and does not 105 * matter when built as a loadable module. Like bus 106 * snooping debug drivers. 107 */ 108 #define early_initcall(fn) module_init(fn) 109 #define core_initcall(fn) module_init(fn) 110 #define core_initcall_sync(fn) module_init(fn) 111 #define postcore_initcall(fn) module_init(fn) 112 #define postcore_initcall_sync(fn) module_init(fn) 113 #define arch_initcall(fn) module_init(fn) 114 #define subsys_initcall(fn) module_init(fn) 115 #define subsys_initcall_sync(fn) module_init(fn) 116 #define fs_initcall(fn) module_init(fn) 117 #define fs_initcall_sync(fn) module_init(fn) 118 #define rootfs_initcall(fn) module_init(fn) 119 #define device_initcall(fn) module_init(fn) 120 #define device_initcall_sync(fn) module_init(fn) 121 #define late_initcall(fn) module_init(fn) 122 #define late_initcall_sync(fn) module_init(fn) 123 124 #define console_initcall(fn) module_init(fn) 125 #define security_initcall(fn) module_init(fn) 126 127 /* Each module must use one module_init(). */ 128 #define module_init(initfn) \ 129 static inline initcall_t __maybe_unused __inittest(void) \ 130 { return initfn; } \ 131 int init_module(void) __attribute__((alias(#initfn))); 132 133 /* This is only required if you want to be unloadable. */ 134 #define module_exit(exitfn) \ 135 static inline exitcall_t __maybe_unused __exittest(void) \ 136 { return exitfn; } \ 137 void cleanup_module(void) __attribute__((alias(#exitfn))); 138 139 #endif 140 141 /* This means "can be init if no module support, otherwise module load 142 may call it." */ 143 #ifdef CONFIG_MODULES 144 #define __init_or_module 145 #define __initdata_or_module 146 #define __initconst_or_module 147 #define __INIT_OR_MODULE .text 148 #define __INITDATA_OR_MODULE .data 149 #define __INITRODATA_OR_MODULE .section ".rodata","a",%progbits 150 #else 151 #define __init_or_module __init 152 #define __initdata_or_module __initdata 153 #define __initconst_or_module __initconst 154 #define __INIT_OR_MODULE __INIT 155 #define __INITDATA_OR_MODULE __INITDATA 156 #define __INITRODATA_OR_MODULE __INITRODATA 157 #endif /*CONFIG_MODULES*/ 158 159 /* Generic info of form tag = "info" */ 160 #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) 161 162 /* For userspace: you can also call me... */ 163 #define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias) 164 165 /* Soft module dependencies. See man modprobe.d for details. 166 * Example: MODULE_SOFTDEP("pre: module-foo module-bar post: module-baz") 167 */ 168 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep) 169 170 /* 171 * The following license idents are currently accepted as indicating free 172 * software modules 173 * 174 * "GPL" [GNU Public License v2 or later] 175 * "GPL v2" [GNU Public License v2] 176 * "GPL and additional rights" [GNU Public License v2 rights and more] 177 * "Dual BSD/GPL" [GNU Public License v2 178 * or BSD license choice] 179 * "Dual MIT/GPL" [GNU Public License v2 180 * or MIT license choice] 181 * "Dual MPL/GPL" [GNU Public License v2 182 * or Mozilla license choice] 183 * 184 * The following other idents are available 185 * 186 * "Proprietary" [Non free products] 187 * 188 * There are dual licensed components, but when running with Linux it is the 189 * GPL that is relevant so this is a non issue. Similarly LGPL linked with GPL 190 * is a GPL combined work. 191 * 192 * This exists for several reasons 193 * 1. So modinfo can show license info for users wanting to vet their setup 194 * is free 195 * 2. So the community can ignore bug reports including proprietary modules 196 * 3. So vendors can do likewise based on their own policies 197 */ 198 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) 199 200 /* 201 * Author(s), use "Name <email>" or just "Name", for multiple 202 * authors use multiple MODULE_AUTHOR() statements/lines. 203 */ 204 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) 205 206 /* What your module does. */ 207 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) 208 209 #ifdef MODULE 210 /* Creates an alias so file2alias.c can find device table. */ 211 #define MODULE_DEVICE_TABLE(type, name) \ 212 extern typeof(name) __mod_##type##__##name##_device_table \ 213 __attribute__ ((unused, alias(__stringify(name)))) 214 #else /* !MODULE */ 215 #define MODULE_DEVICE_TABLE(type, name) 216 #endif 217 218 /* Version of form [<epoch>:]<version>[-<extra-version>]. 219 * Or for CVS/RCS ID version, everything but the number is stripped. 220 * <epoch>: A (small) unsigned integer which allows you to start versions 221 * anew. If not mentioned, it's zero. eg. "2:1.0" is after 222 * "1:2.0". 223 224 * <version>: The <version> may contain only alphanumerics and the 225 * character `.'. Ordered by numeric sort for numeric parts, 226 * ascii sort for ascii parts (as per RPM or DEB algorithm). 227 228 * <extraversion>: Like <version>, but inserted for local 229 * customizations, eg "rh3" or "rusty1". 230 231 * Using this automatically adds a checksum of the .c files and the 232 * local headers in "srcversion". 233 */ 234 235 #if defined(MODULE) || !defined(CONFIG_SYSFS) 236 #define MODULE_VERSION(_version) MODULE_INFO(version, _version) 237 #else 238 #define MODULE_VERSION(_version) \ 239 static struct module_version_attribute ___modver_attr = { \ 240 .mattr = { \ 241 .attr = { \ 242 .name = "version", \ 243 .mode = S_IRUGO, \ 244 }, \ 245 .show = __modver_version_show, \ 246 }, \ 247 .module_name = KBUILD_MODNAME, \ 248 .version = _version, \ 249 }; \ 250 static const struct module_version_attribute \ 251 __used __attribute__ ((__section__ ("__modver"))) \ 252 * __moduleparam_const __modver_attr = &___modver_attr 253 #endif 254 255 /* Optional firmware file (or files) needed by the module 256 * format is simply firmware file name. Multiple firmware 257 * files require multiple MODULE_FIRMWARE() specifiers */ 258 #define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware) 259 260 struct notifier_block; 261 262 #ifdef CONFIG_MODULES 263 264 extern int modules_disabled; /* for sysctl */ 265 /* Get/put a kernel symbol (calls must be symmetric) */ 266 void *__symbol_get(const char *symbol); 267 void *__symbol_get_gpl(const char *symbol); 268 #define symbol_get(x) ((typeof(&x))(__symbol_get(VMLINUX_SYMBOL_STR(x)))) 269 270 /* modules using other modules: kdb wants to see this. */ 271 struct module_use { 272 struct list_head source_list; 273 struct list_head target_list; 274 struct module *source, *target; 275 }; 276 277 enum module_state { 278 MODULE_STATE_LIVE, /* Normal state. */ 279 MODULE_STATE_COMING, /* Full formed, running module_init. */ 280 MODULE_STATE_GOING, /* Going away. */ 281 MODULE_STATE_UNFORMED, /* Still setting it up. */ 282 }; 283 284 struct mod_tree_node { 285 struct module *mod; 286 struct latch_tree_node node; 287 }; 288 289 struct module_layout { 290 /* The actual code + data. */ 291 void *base; 292 /* Total size. */ 293 unsigned int size; 294 /* The size of the executable code. */ 295 unsigned int text_size; 296 /* Size of RO section of the module (text+rodata) */ 297 unsigned int ro_size; 298 /* Size of RO after init section */ 299 unsigned int ro_after_init_size; 300 301 #ifdef CONFIG_MODULES_TREE_LOOKUP 302 struct mod_tree_node mtn; 303 #endif 304 }; 305 306 #ifdef CONFIG_MODULES_TREE_LOOKUP 307 /* Only touch one cacheline for common rbtree-for-core-layout case. */ 308 #define __module_layout_align ____cacheline_aligned 309 #else 310 #define __module_layout_align 311 #endif 312 313 struct mod_kallsyms { 314 Elf_Sym *symtab; 315 unsigned int num_symtab; 316 char *strtab; 317 }; 318 319 #ifdef CONFIG_LIVEPATCH 320 struct klp_modinfo { 321 Elf_Ehdr hdr; 322 Elf_Shdr *sechdrs; 323 char *secstrings; 324 unsigned int symndx; 325 }; 326 #endif 327 328 struct module { 329 enum module_state state; 330 331 /* Member of list of modules */ 332 struct list_head list; 333 334 /* Unique handle for this module */ 335 char name[MODULE_NAME_LEN]; 336 337 /* Sysfs stuff. */ 338 struct module_kobject mkobj; 339 struct module_attribute *modinfo_attrs; 340 const char *version; 341 const char *srcversion; 342 struct kobject *holders_dir; 343 344 /* Exported symbols */ 345 const struct kernel_symbol *syms; 346 const s32 *crcs; 347 unsigned int num_syms; 348 349 /* Kernel parameters. */ 350 #ifdef CONFIG_SYSFS 351 struct mutex param_lock; 352 #endif 353 struct kernel_param *kp; 354 unsigned int num_kp; 355 356 /* GPL-only exported symbols. */ 357 unsigned int num_gpl_syms; 358 const struct kernel_symbol *gpl_syms; 359 const s32 *gpl_crcs; 360 361 #ifdef CONFIG_UNUSED_SYMBOLS 362 /* unused exported symbols. */ 363 const struct kernel_symbol *unused_syms; 364 const s32 *unused_crcs; 365 unsigned int num_unused_syms; 366 367 /* GPL-only, unused exported symbols. */ 368 unsigned int num_unused_gpl_syms; 369 const struct kernel_symbol *unused_gpl_syms; 370 const s32 *unused_gpl_crcs; 371 #endif 372 373 #ifdef CONFIG_MODULE_SIG 374 /* Signature was verified. */ 375 bool sig_ok; 376 #endif 377 378 bool async_probe_requested; 379 380 /* symbols that will be GPL-only in the near future. */ 381 const struct kernel_symbol *gpl_future_syms; 382 const s32 *gpl_future_crcs; 383 unsigned int num_gpl_future_syms; 384 385 /* Exception table */ 386 unsigned int num_exentries; 387 struct exception_table_entry *extable; 388 389 /* Startup function. */ 390 int (*init)(void); 391 392 /* Core layout: rbtree is accessed frequently, so keep together. */ 393 struct module_layout core_layout __module_layout_align; 394 struct module_layout init_layout; 395 396 /* Arch-specific module values */ 397 struct mod_arch_specific arch; 398 399 unsigned long taints; /* same bits as kernel:taint_flags */ 400 401 #ifdef CONFIG_GENERIC_BUG 402 /* Support for BUG */ 403 unsigned num_bugs; 404 struct list_head bug_list; 405 struct bug_entry *bug_table; 406 #endif 407 408 #ifdef CONFIG_KALLSYMS 409 /* Protected by RCU and/or module_mutex: use rcu_dereference() */ 410 struct mod_kallsyms *kallsyms; 411 struct mod_kallsyms core_kallsyms; 412 413 /* Section attributes */ 414 struct module_sect_attrs *sect_attrs; 415 416 /* Notes attributes */ 417 struct module_notes_attrs *notes_attrs; 418 #endif 419 420 /* The command line arguments (may be mangled). People like 421 keeping pointers to this stuff */ 422 char *args; 423 424 #ifdef CONFIG_SMP 425 /* Per-cpu data. */ 426 void __percpu *percpu; 427 unsigned int percpu_size; 428 #endif 429 430 #ifdef CONFIG_TRACEPOINTS 431 unsigned int num_tracepoints; 432 struct tracepoint * const *tracepoints_ptrs; 433 #endif 434 #ifdef HAVE_JUMP_LABEL 435 struct jump_entry *jump_entries; 436 unsigned int num_jump_entries; 437 #endif 438 #ifdef CONFIG_TRACING 439 unsigned int num_trace_bprintk_fmt; 440 const char **trace_bprintk_fmt_start; 441 #endif 442 #ifdef CONFIG_EVENT_TRACING 443 struct trace_event_call **trace_events; 444 unsigned int num_trace_events; 445 struct trace_eval_map **trace_evals; 446 unsigned int num_trace_evals; 447 #endif 448 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 449 unsigned int num_ftrace_callsites; 450 unsigned long *ftrace_callsites; 451 #endif 452 453 #ifdef CONFIG_LIVEPATCH 454 bool klp; /* Is this a livepatch module? */ 455 bool klp_alive; 456 457 /* Elf information */ 458 struct klp_modinfo *klp_info; 459 #endif 460 461 #ifdef CONFIG_MODULE_UNLOAD 462 /* What modules depend on me? */ 463 struct list_head source_list; 464 /* What modules do I depend on? */ 465 struct list_head target_list; 466 467 /* Destruction function. */ 468 void (*exit)(void); 469 470 atomic_t refcnt; 471 #endif 472 473 #ifdef CONFIG_CONSTRUCTORS 474 /* Constructor functions. */ 475 ctor_fn_t *ctors; 476 unsigned int num_ctors; 477 #endif 478 } ____cacheline_aligned __randomize_layout; 479 #ifndef MODULE_ARCH_INIT 480 #define MODULE_ARCH_INIT {} 481 #endif 482 483 extern struct mutex module_mutex; 484 485 /* FIXME: It'd be nice to isolate modules during init, too, so they 486 aren't used before they (may) fail. But presently too much code 487 (IDE & SCSI) require entry into the module during init.*/ 488 static inline int module_is_live(struct module *mod) 489 { 490 return mod->state != MODULE_STATE_GOING; 491 } 492 493 struct module *__module_text_address(unsigned long addr); 494 struct module *__module_address(unsigned long addr); 495 bool is_module_address(unsigned long addr); 496 bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr); 497 bool is_module_percpu_address(unsigned long addr); 498 bool is_module_text_address(unsigned long addr); 499 500 static inline bool within_module_core(unsigned long addr, 501 const struct module *mod) 502 { 503 return (unsigned long)mod->core_layout.base <= addr && 504 addr < (unsigned long)mod->core_layout.base + mod->core_layout.size; 505 } 506 507 static inline bool within_module_init(unsigned long addr, 508 const struct module *mod) 509 { 510 return (unsigned long)mod->init_layout.base <= addr && 511 addr < (unsigned long)mod->init_layout.base + mod->init_layout.size; 512 } 513 514 static inline bool within_module(unsigned long addr, const struct module *mod) 515 { 516 return within_module_init(addr, mod) || within_module_core(addr, mod); 517 } 518 519 /* Search for module by name: must hold module_mutex. */ 520 struct module *find_module(const char *name); 521 522 struct symsearch { 523 const struct kernel_symbol *start, *stop; 524 const s32 *crcs; 525 enum { 526 NOT_GPL_ONLY, 527 GPL_ONLY, 528 WILL_BE_GPL_ONLY, 529 } licence; 530 bool unused; 531 }; 532 533 /* 534 * Search for an exported symbol by name. 535 * 536 * Must be called with module_mutex held or preemption disabled. 537 */ 538 const struct kernel_symbol *find_symbol(const char *name, 539 struct module **owner, 540 const s32 **crc, 541 bool gplok, 542 bool warn); 543 544 /* 545 * Walk the exported symbol table 546 * 547 * Must be called with module_mutex held or preemption disabled. 548 */ 549 bool each_symbol_section(bool (*fn)(const struct symsearch *arr, 550 struct module *owner, 551 void *data), void *data); 552 553 /* Returns 0 and fills in value, defined and namebuf, or -ERANGE if 554 symnum out of range. */ 555 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, 556 char *name, char *module_name, int *exported); 557 558 /* Look for this name: can be of form module:name. */ 559 unsigned long module_kallsyms_lookup_name(const char *name); 560 561 int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 562 struct module *, unsigned long), 563 void *data); 564 565 extern void __noreturn __module_put_and_exit(struct module *mod, 566 long code); 567 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code) 568 569 #ifdef CONFIG_MODULE_UNLOAD 570 int module_refcount(struct module *mod); 571 void __symbol_put(const char *symbol); 572 #define symbol_put(x) __symbol_put(VMLINUX_SYMBOL_STR(x)) 573 void symbol_put_addr(void *addr); 574 575 /* Sometimes we know we already have a refcount, and it's easier not 576 to handle the error case (which only happens with rmmod --wait). */ 577 extern void __module_get(struct module *module); 578 579 /* This is the Right Way to get a module: if it fails, it's being removed, 580 * so pretend it's not there. */ 581 extern bool try_module_get(struct module *module); 582 583 extern void module_put(struct module *module); 584 585 #else /*!CONFIG_MODULE_UNLOAD*/ 586 static inline bool try_module_get(struct module *module) 587 { 588 return !module || module_is_live(module); 589 } 590 static inline void module_put(struct module *module) 591 { 592 } 593 static inline void __module_get(struct module *module) 594 { 595 } 596 #define symbol_put(x) do { } while (0) 597 #define symbol_put_addr(p) do { } while (0) 598 599 #endif /* CONFIG_MODULE_UNLOAD */ 600 int ref_module(struct module *a, struct module *b); 601 602 /* This is a #define so the string doesn't get put in every .o file */ 603 #define module_name(mod) \ 604 ({ \ 605 struct module *__mod = (mod); \ 606 __mod ? __mod->name : "kernel"; \ 607 }) 608 609 /* For kallsyms to ask for address resolution. namebuf should be at 610 * least KSYM_NAME_LEN long: a pointer to namebuf is returned if 611 * found, otherwise NULL. */ 612 const char *module_address_lookup(unsigned long addr, 613 unsigned long *symbolsize, 614 unsigned long *offset, 615 char **modname, 616 char *namebuf); 617 int lookup_module_symbol_name(unsigned long addr, char *symname); 618 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); 619 620 int register_module_notifier(struct notifier_block *nb); 621 int unregister_module_notifier(struct notifier_block *nb); 622 623 extern void print_modules(void); 624 625 static inline bool module_requested_async_probing(struct module *module) 626 { 627 return module && module->async_probe_requested; 628 } 629 630 #ifdef CONFIG_LIVEPATCH 631 static inline bool is_livepatch_module(struct module *mod) 632 { 633 return mod->klp; 634 } 635 #else /* !CONFIG_LIVEPATCH */ 636 static inline bool is_livepatch_module(struct module *mod) 637 { 638 return false; 639 } 640 #endif /* CONFIG_LIVEPATCH */ 641 642 bool is_module_sig_enforced(void); 643 644 #else /* !CONFIG_MODULES... */ 645 646 static inline struct module *__module_address(unsigned long addr) 647 { 648 return NULL; 649 } 650 651 static inline struct module *__module_text_address(unsigned long addr) 652 { 653 return NULL; 654 } 655 656 static inline bool is_module_address(unsigned long addr) 657 { 658 return false; 659 } 660 661 static inline bool is_module_percpu_address(unsigned long addr) 662 { 663 return false; 664 } 665 666 static inline bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) 667 { 668 return false; 669 } 670 671 static inline bool is_module_text_address(unsigned long addr) 672 { 673 return false; 674 } 675 676 /* Get/put a kernel symbol (calls should be symmetric) */ 677 #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); }) 678 #define symbol_put(x) do { } while (0) 679 #define symbol_put_addr(x) do { } while (0) 680 681 static inline void __module_get(struct module *module) 682 { 683 } 684 685 static inline bool try_module_get(struct module *module) 686 { 687 return true; 688 } 689 690 static inline void module_put(struct module *module) 691 { 692 } 693 694 #define module_name(mod) "kernel" 695 696 /* For kallsyms to ask for address resolution. NULL means not found. */ 697 static inline const char *module_address_lookup(unsigned long addr, 698 unsigned long *symbolsize, 699 unsigned long *offset, 700 char **modname, 701 char *namebuf) 702 { 703 return NULL; 704 } 705 706 static inline int lookup_module_symbol_name(unsigned long addr, char *symname) 707 { 708 return -ERANGE; 709 } 710 711 static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) 712 { 713 return -ERANGE; 714 } 715 716 static inline int module_get_kallsym(unsigned int symnum, unsigned long *value, 717 char *type, char *name, 718 char *module_name, int *exported) 719 { 720 return -ERANGE; 721 } 722 723 static inline unsigned long module_kallsyms_lookup_name(const char *name) 724 { 725 return 0; 726 } 727 728 static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, 729 struct module *, 730 unsigned long), 731 void *data) 732 { 733 return 0; 734 } 735 736 static inline int register_module_notifier(struct notifier_block *nb) 737 { 738 /* no events will happen anyway, so this can always succeed */ 739 return 0; 740 } 741 742 static inline int unregister_module_notifier(struct notifier_block *nb) 743 { 744 return 0; 745 } 746 747 #define module_put_and_exit(code) do_exit(code) 748 749 static inline void print_modules(void) 750 { 751 } 752 753 static inline bool module_requested_async_probing(struct module *module) 754 { 755 return false; 756 } 757 758 static inline bool is_module_sig_enforced(void) 759 { 760 return false; 761 } 762 763 #endif /* CONFIG_MODULES */ 764 765 #ifdef CONFIG_SYSFS 766 extern struct kset *module_kset; 767 extern struct kobj_type module_ktype; 768 extern int module_sysfs_initialized; 769 #endif /* CONFIG_SYSFS */ 770 771 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x) 772 773 /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ 774 775 #define __MODULE_STRING(x) __stringify(x) 776 777 #ifdef CONFIG_STRICT_MODULE_RWX 778 extern void set_all_modules_text_rw(void); 779 extern void set_all_modules_text_ro(void); 780 extern void module_enable_ro(const struct module *mod, bool after_init); 781 extern void module_disable_ro(const struct module *mod); 782 #else 783 static inline void set_all_modules_text_rw(void) { } 784 static inline void set_all_modules_text_ro(void) { } 785 static inline void module_enable_ro(const struct module *mod, bool after_init) { } 786 static inline void module_disable_ro(const struct module *mod) { } 787 #endif 788 789 #ifdef CONFIG_GENERIC_BUG 790 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *, 791 struct module *); 792 void module_bug_cleanup(struct module *); 793 794 #else /* !CONFIG_GENERIC_BUG */ 795 796 static inline void module_bug_finalize(const Elf_Ehdr *hdr, 797 const Elf_Shdr *sechdrs, 798 struct module *mod) 799 { 800 } 801 static inline void module_bug_cleanup(struct module *mod) {} 802 #endif /* CONFIG_GENERIC_BUG */ 803 804 #ifdef CONFIG_MODULE_SIG 805 static inline bool module_sig_ok(struct module *module) 806 { 807 return module->sig_ok; 808 } 809 #else /* !CONFIG_MODULE_SIG */ 810 static inline bool module_sig_ok(struct module *module) 811 { 812 return true; 813 } 814 #endif /* CONFIG_MODULE_SIG */ 815 816 #endif /* _LINUX_MODULE_H */ 817