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 8 #ifndef __OS_H__ 9 #define __OS_H__ 10 11 #include <irq_user.h> 12 #include <longjmp.h> 13 #include <mm_id.h> 14 /* This is to get size_t */ 15 #ifndef __UM_HOST__ 16 #include <linux/types.h> 17 #else 18 #include <sys/types.h> 19 #endif 20 21 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) 22 23 #define OS_TYPE_FILE 1 24 #define OS_TYPE_DIR 2 25 #define OS_TYPE_SYMLINK 3 26 #define OS_TYPE_CHARDEV 4 27 #define OS_TYPE_BLOCKDEV 5 28 #define OS_TYPE_FIFO 6 29 #define OS_TYPE_SOCK 7 30 31 /* os_access() flags */ 32 #define OS_ACC_F_OK 0 /* Test for existence. */ 33 #define OS_ACC_X_OK 1 /* Test for execute permission. */ 34 #define OS_ACC_W_OK 2 /* Test for write permission. */ 35 #define OS_ACC_R_OK 4 /* Test for read permission. */ 36 #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */ 37 38 #ifdef CONFIG_64BIT 39 #define OS_LIB_PATH "/usr/lib64/" 40 #else 41 #define OS_LIB_PATH "/usr/lib/" 42 #endif 43 44 #define OS_SENDMSG_MAX_FDS 8 45 46 /* 47 * types taken from stat_file() in hostfs_user.c 48 * (if they are wrong here, they are wrong there...). 49 */ 50 struct uml_stat { 51 int ust_dev; /* device */ 52 unsigned long long ust_ino; /* inode */ 53 int ust_mode; /* protection */ 54 int ust_nlink; /* number of hard links */ 55 int ust_uid; /* user ID of owner */ 56 int ust_gid; /* group ID of owner */ 57 unsigned long long ust_size; /* total size, in bytes */ 58 int ust_blksize; /* blocksize for filesystem I/O */ 59 unsigned long long ust_blocks; /* number of blocks allocated */ 60 unsigned long ust_atime; /* time of last access */ 61 unsigned long ust_mtime; /* time of last modification */ 62 unsigned long ust_ctime; /* time of last change */ 63 }; 64 65 struct openflags { 66 unsigned int r : 1; 67 unsigned int w : 1; 68 unsigned int s : 1; /* O_SYNC */ 69 unsigned int c : 1; /* O_CREAT */ 70 unsigned int t : 1; /* O_TRUNC */ 71 unsigned int a : 1; /* O_APPEND */ 72 unsigned int e : 1; /* O_EXCL */ 73 unsigned int cl : 1; /* FD_CLOEXEC */ 74 }; 75 76 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ 77 .t = 0, .a = 0, .e = 0, .cl = 0 }) 78 79 static inline struct openflags of_read(struct openflags flags) 80 { 81 flags.r = 1; 82 return flags; 83 } 84 85 static inline struct openflags of_write(struct openflags flags) 86 { 87 flags.w = 1; 88 return flags; 89 } 90 91 static inline struct openflags of_rdwr(struct openflags flags) 92 { 93 return of_read(of_write(flags)); 94 } 95 96 static inline struct openflags of_set_rw(struct openflags flags, int r, int w) 97 { 98 flags.r = r; 99 flags.w = w; 100 return flags; 101 } 102 103 static inline struct openflags of_sync(struct openflags flags) 104 { 105 flags.s = 1; 106 return flags; 107 } 108 109 static inline struct openflags of_create(struct openflags flags) 110 { 111 flags.c = 1; 112 return flags; 113 } 114 115 static inline struct openflags of_trunc(struct openflags flags) 116 { 117 flags.t = 1; 118 return flags; 119 } 120 121 static inline struct openflags of_append(struct openflags flags) 122 { 123 flags.a = 1; 124 return flags; 125 } 126 127 static inline struct openflags of_excl(struct openflags flags) 128 { 129 flags.e = 1; 130 return flags; 131 } 132 133 static inline struct openflags of_cloexec(struct openflags flags) 134 { 135 flags.cl = 1; 136 return flags; 137 } 138 139 /* file.c */ 140 extern int os_stat_file(const char *file_name, struct uml_stat *buf); 141 extern int os_stat_fd(const int fd, struct uml_stat *buf); 142 extern int os_access(const char *file, int mode); 143 extern int os_set_exec_close(int fd); 144 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 145 extern int os_get_ifname(int fd, char *namebuf); 146 extern int os_set_slip(int fd); 147 extern int os_mode_fd(int fd, int mode); 148 149 extern int os_seek_file(int fd, unsigned long long offset); 150 extern int os_open_file(const char *file, struct openflags flags, int mode); 151 extern int os_read_file(int fd, void *buf, int len); 152 extern int os_write_file(int fd, const void *buf, int count); 153 extern int os_sync_file(int fd); 154 extern int os_file_size(const char *file, unsigned long long *size_out); 155 extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset); 156 extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset); 157 extern int os_file_modtime(const char *file, long long *modtime); 158 extern int os_pipe(int *fd, int stream, int close_on_exec); 159 extern int os_set_fd_async(int fd); 160 extern int os_clear_fd_async(int fd); 161 extern int os_set_fd_block(int fd, int blocking); 162 extern int os_accept_connection(int fd); 163 extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 164 extern int os_shutdown_socket(int fd, int r, int w); 165 extern int os_dup_file(int fd); 166 extern void os_close_file(int fd); 167 ssize_t os_rcv_fd_msg(int fd, int *fds, unsigned int n_fds, 168 void *data, size_t data_len); 169 extern int os_connect_socket(const char *name); 170 extern int os_file_type(char *file); 171 extern int os_file_mode(const char *file, struct openflags *mode_out); 172 extern int os_lock_file(int fd, int excl); 173 extern void os_flush_stdout(void); 174 extern unsigned os_major(unsigned long long dev); 175 extern unsigned os_minor(unsigned long long dev); 176 extern unsigned long long os_makedev(unsigned major, unsigned minor); 177 extern int os_falloc_punch(int fd, unsigned long long offset, int count); 178 extern int os_falloc_zeroes(int fd, unsigned long long offset, int count); 179 extern int os_eventfd(unsigned int initval, int flags); 180 extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len, 181 const int *fds, unsigned int fds_num); 182 int os_poll(unsigned int n, const int *fds); 183 void *os_mmap_rw_shared(int fd, size_t size); 184 void *os_mremap_rw_shared(void *old_addr, size_t old_size, size_t new_size); 185 186 /* start_up.c */ 187 extern void os_early_checks(void); 188 extern void os_check_bugs(void); 189 extern void check_host_supports_tls(int *supports_tls, int *tls_min); 190 extern void get_host_cpu_features( 191 void (*flags_helper_func)(char *line), 192 void (*cache_helper_func)(char *line)); 193 194 /* mem.c */ 195 extern int create_mem_file(unsigned long long len); 196 197 /* tlb.c */ 198 extern void report_enomem(void); 199 200 /* process.c */ 201 extern void os_alarm_process(int pid); 202 extern void os_kill_process(int pid, int reap_child); 203 extern void os_kill_ptraced_process(int pid, int reap_child); 204 205 extern int os_getpid(void); 206 207 extern void init_new_thread_signals(void); 208 209 extern int os_map_memory(void *virt, int fd, unsigned long long off, 210 unsigned long len, int r, int w, int x); 211 extern int os_protect_memory(void *addr, unsigned long len, 212 int r, int w, int x); 213 extern int os_unmap_memory(void *addr, int len); 214 extern int os_drop_memory(void *addr, int length); 215 extern int can_drop_memory(void); 216 extern int os_mincore(void *addr, unsigned long len); 217 218 void os_set_pdeathsig(void); 219 220 /* execvp.c */ 221 extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 222 /* helper.c */ 223 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); 224 extern int run_helper_thread(int (*proc)(void *), void *arg, 225 unsigned int flags, unsigned long *stack_out); 226 extern int helper_wait(int pid); 227 228 229 /* umid.c */ 230 extern int umid_file_name(char *name, char *buf, int len); 231 extern int set_umid(char *name); 232 extern char *get_umid(void); 233 234 /* signal.c */ 235 extern void timer_set_signal_handler(void); 236 extern void set_sigstack(void *sig_stack, int size); 237 extern void set_handler(int sig); 238 extern void send_sigio_to_self(void); 239 extern int change_sig(int signal, int on); 240 extern void block_signals(void); 241 extern void unblock_signals(void); 242 extern int um_set_signals(int enable); 243 extern int um_set_signals_trace(int enable); 244 extern void deliver_alarm(void); 245 extern void register_pm_wake_signal(void); 246 extern void block_signals_hard(void); 247 extern void unblock_signals_hard(void); 248 extern void mark_sigio_pending(void); 249 250 /* util.c */ 251 extern void stack_protections(unsigned long address); 252 extern int raw(int fd); 253 extern void setup_machinename(char *machine_out); 254 extern void setup_hostinfo(char *buf, int len); 255 extern ssize_t os_getrandom(void *buf, size_t len, unsigned int flags); 256 extern void os_dump_core(void) __attribute__ ((noreturn)); 257 extern void um_early_printk(const char *s, unsigned int n); 258 extern void os_fix_helper_signals(void); 259 extern void os_info(const char *fmt, ...) 260 __attribute__ ((format (printf, 1, 2))); 261 extern void os_warn(const char *fmt, ...) 262 __attribute__ ((format (printf, 1, 2))); 263 264 /* time.c */ 265 extern void os_idle_sleep(void); 266 extern int os_timer_create(void); 267 extern int os_timer_set_interval(unsigned long long nsecs); 268 extern int os_timer_one_shot(unsigned long long nsecs); 269 extern void os_timer_disable(void); 270 extern long long os_persistent_clock_emulation(void); 271 extern long long os_nsecs(void); 272 273 /* skas/mem.c */ 274 int syscall_stub_flush(struct mm_id *mm_idp); 275 struct stub_syscall *syscall_stub_alloc(struct mm_id *mm_idp); 276 void syscall_stub_dump_error(struct mm_id *mm_idp); 277 278 int map(struct mm_id *mm_idp, unsigned long virt, 279 unsigned long len, int prot, int phys_fd, 280 unsigned long long offset); 281 int unmap(struct mm_id *mm_idp, unsigned long addr, unsigned long len); 282 283 /* skas/process.c */ 284 extern int is_skas_winch(int pid, int fd, void *data); 285 extern int start_userspace(unsigned long stub_stack); 286 extern void userspace(struct uml_pt_regs *regs); 287 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 288 extern void switch_threads(jmp_buf *me, jmp_buf *you); 289 extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 290 extern void initial_thread_cb_skas(void (*proc)(void *), 291 void *arg); 292 extern void halt_skas(void); 293 extern void reboot_skas(void); 294 295 /* irq.c */ 296 extern int os_waiting_for_events_epoll(void); 297 extern void *os_epoll_get_data_pointer(int index); 298 extern int os_epoll_triggered(int index, int events); 299 extern int os_event_mask(enum um_irq_type irq_type); 300 extern int os_setup_epoll(void); 301 extern int os_add_epoll_fd(int events, int fd, void *data); 302 extern int os_mod_epoll_fd(int events, int fd, void *data); 303 extern int os_del_epoll_fd(int fd); 304 extern void os_set_ioignore(void); 305 extern void os_close_epoll_fd(void); 306 extern void um_irqs_suspend(void); 307 extern void um_irqs_resume(void); 308 309 /* sigio.c */ 310 extern int add_sigio_fd(int fd); 311 extern int ignore_sigio_fd(int fd); 312 extern void maybe_sigio_broken(int fd); 313 extern void sigio_broken(int fd); 314 /* 315 * unlocked versions for IRQ controller code. 316 * 317 * This is safe because it's used at suspend/resume and nothing 318 * else is running. 319 */ 320 extern int __add_sigio_fd(int fd); 321 extern int __ignore_sigio_fd(int fd); 322 323 /* tty.c */ 324 extern int get_pty(void); 325 326 long syscall(long number, ...); 327 328 /* irqflags tracing */ 329 extern void block_signals_trace(void); 330 extern void unblock_signals_trace(void); 331 extern void um_trace_signals_on(void); 332 extern void um_trace_signals_off(void); 333 334 /* time-travel */ 335 extern void deliver_time_travel_irqs(void); 336 337 #endif 338