/arch/um/include/shared/os.h

http://github.com/mirrors/linux · C Header · 333 lines · 260 code · 44 blank · 29 comment · 3 complexity · 352200c04ca7e848b08d5831b5b12831 MD5 · raw file

  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
  4. * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
  5. * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  6. */
  7. #ifndef __OS_H__
  8. #define __OS_H__
  9. #include <stdarg.h>
  10. #include <irq_user.h>
  11. #include <longjmp.h>
  12. #include <mm_id.h>
  13. #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
  14. #define OS_TYPE_FILE 1
  15. #define OS_TYPE_DIR 2
  16. #define OS_TYPE_SYMLINK 3
  17. #define OS_TYPE_CHARDEV 4
  18. #define OS_TYPE_BLOCKDEV 5
  19. #define OS_TYPE_FIFO 6
  20. #define OS_TYPE_SOCK 7
  21. /* os_access() flags */
  22. #define OS_ACC_F_OK 0 /* Test for existence. */
  23. #define OS_ACC_X_OK 1 /* Test for execute permission. */
  24. #define OS_ACC_W_OK 2 /* Test for write permission. */
  25. #define OS_ACC_R_OK 4 /* Test for read permission. */
  26. #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
  27. #ifdef CONFIG_64BIT
  28. #define OS_LIB_PATH "/usr/lib64/"
  29. #else
  30. #define OS_LIB_PATH "/usr/lib/"
  31. #endif
  32. #define OS_SENDMSG_MAX_FDS 8
  33. /*
  34. * types taken from stat_file() in hostfs_user.c
  35. * (if they are wrong here, they are wrong there...).
  36. */
  37. struct uml_stat {
  38. int ust_dev; /* device */
  39. unsigned long long ust_ino; /* inode */
  40. int ust_mode; /* protection */
  41. int ust_nlink; /* number of hard links */
  42. int ust_uid; /* user ID of owner */
  43. int ust_gid; /* group ID of owner */
  44. unsigned long long ust_size; /* total size, in bytes */
  45. int ust_blksize; /* blocksize for filesystem I/O */
  46. unsigned long long ust_blocks; /* number of blocks allocated */
  47. unsigned long ust_atime; /* time of last access */
  48. unsigned long ust_mtime; /* time of last modification */
  49. unsigned long ust_ctime; /* time of last change */
  50. };
  51. struct openflags {
  52. unsigned int r : 1;
  53. unsigned int w : 1;
  54. unsigned int s : 1; /* O_SYNC */
  55. unsigned int c : 1; /* O_CREAT */
  56. unsigned int t : 1; /* O_TRUNC */
  57. unsigned int a : 1; /* O_APPEND */
  58. unsigned int e : 1; /* O_EXCL */
  59. unsigned int cl : 1; /* FD_CLOEXEC */
  60. };
  61. #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
  62. .t = 0, .a = 0, .e = 0, .cl = 0 })
  63. static inline struct openflags of_read(struct openflags flags)
  64. {
  65. flags.r = 1;
  66. return flags;
  67. }
  68. static inline struct openflags of_write(struct openflags flags)
  69. {
  70. flags.w = 1;
  71. return flags;
  72. }
  73. static inline struct openflags of_rdwr(struct openflags flags)
  74. {
  75. return of_read(of_write(flags));
  76. }
  77. static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
  78. {
  79. flags.r = r;
  80. flags.w = w;
  81. return flags;
  82. }
  83. static inline struct openflags of_sync(struct openflags flags)
  84. {
  85. flags.s = 1;
  86. return flags;
  87. }
  88. static inline struct openflags of_create(struct openflags flags)
  89. {
  90. flags.c = 1;
  91. return flags;
  92. }
  93. static inline struct openflags of_trunc(struct openflags flags)
  94. {
  95. flags.t = 1;
  96. return flags;
  97. }
  98. static inline struct openflags of_append(struct openflags flags)
  99. {
  100. flags.a = 1;
  101. return flags;
  102. }
  103. static inline struct openflags of_excl(struct openflags flags)
  104. {
  105. flags.e = 1;
  106. return flags;
  107. }
  108. static inline struct openflags of_cloexec(struct openflags flags)
  109. {
  110. flags.cl = 1;
  111. return flags;
  112. }
  113. /* file.c */
  114. extern int os_stat_file(const char *file_name, struct uml_stat *buf);
  115. extern int os_stat_fd(const int fd, struct uml_stat *buf);
  116. extern int os_access(const char *file, int mode);
  117. extern int os_set_exec_close(int fd);
  118. extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
  119. extern int os_get_ifname(int fd, char *namebuf);
  120. extern int os_set_slip(int fd);
  121. extern int os_mode_fd(int fd, int mode);
  122. extern int os_fsync_file(int fd);
  123. extern int os_seek_file(int fd, unsigned long long offset);
  124. extern int os_open_file(const char *file, struct openflags flags, int mode);
  125. extern int os_read_file(int fd, void *buf, int len);
  126. extern int os_write_file(int fd, const void *buf, int count);
  127. extern int os_sync_file(int fd);
  128. extern int os_file_size(const char *file, unsigned long long *size_out);
  129. extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
  130. extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
  131. extern int os_file_modtime(const char *file, long long *modtime);
  132. extern int os_pipe(int *fd, int stream, int close_on_exec);
  133. extern int os_set_fd_async(int fd);
  134. extern int os_clear_fd_async(int fd);
  135. extern int os_set_fd_block(int fd, int blocking);
  136. extern int os_accept_connection(int fd);
  137. extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
  138. extern int os_shutdown_socket(int fd, int r, int w);
  139. extern void os_close_file(int fd);
  140. extern int os_rcv_fd(int fd, int *helper_pid_out);
  141. extern int create_unix_socket(char *file, int len, int close_on_exec);
  142. extern int os_connect_socket(const char *name);
  143. extern int os_file_type(char *file);
  144. extern int os_file_mode(const char *file, struct openflags *mode_out);
  145. extern int os_lock_file(int fd, int excl);
  146. extern void os_flush_stdout(void);
  147. extern int os_stat_filesystem(char *path, long *bsize_out,
  148. long long *blocks_out, long long *bfree_out,
  149. long long *bavail_out, long long *files_out,
  150. long long *ffree_out, void *fsid_out,
  151. int fsid_size, long *namelen_out,
  152. long *spare_out);
  153. extern int os_change_dir(char *dir);
  154. extern int os_fchange_dir(int fd);
  155. extern unsigned os_major(unsigned long long dev);
  156. extern unsigned os_minor(unsigned long long dev);
  157. extern unsigned long long os_makedev(unsigned major, unsigned minor);
  158. extern int os_falloc_punch(int fd, unsigned long long offset, int count);
  159. extern int os_eventfd(unsigned int initval, int flags);
  160. extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
  161. const int *fds, unsigned int fds_num);
  162. int os_poll(unsigned int n, const int *fds);
  163. /* start_up.c */
  164. extern void os_early_checks(void);
  165. extern void os_check_bugs(void);
  166. extern void check_host_supports_tls(int *supports_tls, int *tls_min);
  167. /* mem.c */
  168. extern int create_mem_file(unsigned long long len);
  169. /* process.c */
  170. extern unsigned long os_process_pc(int pid);
  171. extern int os_process_parent(int pid);
  172. extern void os_alarm_process(int pid);
  173. extern void os_stop_process(int pid);
  174. extern void os_kill_process(int pid, int reap_child);
  175. extern void os_kill_ptraced_process(int pid, int reap_child);
  176. extern int os_getpid(void);
  177. extern int os_getpgrp(void);
  178. extern void init_new_thread_signals(void);
  179. extern int os_map_memory(void *virt, int fd, unsigned long long off,
  180. unsigned long len, int r, int w, int x);
  181. extern int os_protect_memory(void *addr, unsigned long len,
  182. int r, int w, int x);
  183. extern int os_unmap_memory(void *addr, int len);
  184. extern int os_drop_memory(void *addr, int length);
  185. extern int can_drop_memory(void);
  186. extern void os_flush_stdout(void);
  187. extern int os_mincore(void *addr, unsigned long len);
  188. /* execvp.c */
  189. extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
  190. /* helper.c */
  191. extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
  192. extern int run_helper_thread(int (*proc)(void *), void *arg,
  193. unsigned int flags, unsigned long *stack_out);
  194. extern int helper_wait(int pid);
  195. /* umid.c */
  196. extern int umid_file_name(char *name, char *buf, int len);
  197. extern int set_umid(char *name);
  198. extern char *get_umid(void);
  199. /* signal.c */
  200. extern void timer_set_signal_handler(void);
  201. extern void set_sigstack(void *sig_stack, int size);
  202. extern void remove_sigstack(void);
  203. extern void set_handler(int sig);
  204. extern int change_sig(int signal, int on);
  205. extern void block_signals(void);
  206. extern void unblock_signals(void);
  207. extern int get_signals(void);
  208. extern int set_signals(int enable);
  209. extern int set_signals_trace(int enable);
  210. extern int os_is_signal_stack(void);
  211. extern void deliver_alarm(void);
  212. /* util.c */
  213. extern void stack_protections(unsigned long address);
  214. extern int raw(int fd);
  215. extern void setup_machinename(char *machine_out);
  216. extern void setup_hostinfo(char *buf, int len);
  217. extern void os_dump_core(void) __attribute__ ((noreturn));
  218. extern void um_early_printk(const char *s, unsigned int n);
  219. extern void os_fix_helper_signals(void);
  220. extern void os_info(const char *fmt, ...)
  221. __attribute__ ((format (printf, 1, 2)));
  222. extern void os_warn(const char *fmt, ...)
  223. __attribute__ ((format (printf, 1, 2)));
  224. /* time.c */
  225. extern void os_idle_sleep(unsigned long long nsecs);
  226. extern int os_timer_create(void);
  227. extern int os_timer_set_interval(unsigned long long nsecs);
  228. extern int os_timer_one_shot(unsigned long long nsecs);
  229. extern void os_timer_disable(void);
  230. extern void uml_idle_timer(void);
  231. extern long long os_persistent_clock_emulation(void);
  232. extern long long os_nsecs(void);
  233. /* skas/mem.c */
  234. extern long run_syscall_stub(struct mm_id * mm_idp,
  235. int syscall, unsigned long *args, long expected,
  236. void **addr, int done);
  237. extern long syscall_stub_data(struct mm_id * mm_idp,
  238. unsigned long *data, int data_count,
  239. void **addr, void **stub_addr);
  240. extern int map(struct mm_id * mm_idp, unsigned long virt,
  241. unsigned long len, int prot, int phys_fd,
  242. unsigned long long offset, int done, void **data);
  243. extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
  244. int done, void **data);
  245. extern int protect(struct mm_id * mm_idp, unsigned long addr,
  246. unsigned long len, unsigned int prot, int done, void **data);
  247. /* skas/process.c */
  248. extern int is_skas_winch(int pid, int fd, void *data);
  249. extern int start_userspace(unsigned long stub_stack);
  250. extern int copy_context_skas0(unsigned long stack, int pid);
  251. extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
  252. extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
  253. unsigned long stack);
  254. extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
  255. extern void switch_threads(jmp_buf *me, jmp_buf *you);
  256. extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
  257. extern void initial_thread_cb_skas(void (*proc)(void *),
  258. void *arg);
  259. extern void halt_skas(void);
  260. extern void reboot_skas(void);
  261. /* irq.c */
  262. extern int os_waiting_for_events_epoll(void);
  263. extern void *os_epoll_get_data_pointer(int index);
  264. extern int os_epoll_triggered(int index, int events);
  265. extern int os_event_mask(int irq_type);
  266. extern int os_setup_epoll(void);
  267. extern int os_add_epoll_fd(int events, int fd, void *data);
  268. extern int os_mod_epoll_fd(int events, int fd, void *data);
  269. extern int os_del_epoll_fd(int fd);
  270. extern void os_set_ioignore(void);
  271. extern void os_close_epoll_fd(void);
  272. /* sigio.c */
  273. extern int add_sigio_fd(int fd);
  274. extern int ignore_sigio_fd(int fd);
  275. extern void maybe_sigio_broken(int fd, int read);
  276. extern void sigio_broken(int fd, int read);
  277. /* prctl.c */
  278. extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
  279. /* tty.c */
  280. extern int get_pty(void);
  281. /* sys-$ARCH/task_size.c */
  282. extern unsigned long os_get_top_address(void);
  283. long syscall(long number, ...);
  284. /* irqflags tracing */
  285. extern void block_signals_trace(void);
  286. extern void unblock_signals_trace(void);
  287. extern void um_trace_signals_on(void);
  288. extern void um_trace_signals_off(void);
  289. #endif