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 */ 50struct 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 65struct 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 79static inline struct openflags of_read(struct openflags flags) 80{ 81 flags.r = 1; 82 return flags; 83} 84 85static inline struct openflags of_write(struct openflags flags) 86{ 87 flags.w = 1; 88 return flags; 89} 90 91static inline struct openflags of_rdwr(struct openflags flags) 92{ 93 return of_read(of_write(flags)); 94} 95 96static 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 103static inline struct openflags of_sync(struct openflags flags) 104{ 105 flags.s = 1; 106 return flags; 107} 108 109static inline struct openflags of_create(struct openflags flags) 110{ 111 flags.c = 1; 112 return flags; 113} 114 115static inline struct openflags of_trunc(struct openflags flags) 116{ 117 flags.t = 1; 118 return flags; 119} 120 121static inline struct openflags of_append(struct openflags flags) 122{ 123 flags.a = 1; 124 return flags; 125} 126 127static inline struct openflags of_excl(struct openflags flags) 128{ 129 flags.e = 1; 130 return flags; 131} 132 133static inline struct openflags of_cloexec(struct openflags flags) 134{ 135 flags.cl = 1; 136 return flags; 137} 138 139/* file.c */ 140extern int os_stat_file(const char *file_name, struct uml_stat *buf); 141extern int os_stat_fd(const int fd, struct uml_stat *buf); 142extern int os_access(const char *file, int mode); 143extern int os_set_exec_close(int fd); 144extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 145extern int os_get_ifname(int fd, char *namebuf); 146extern int os_set_slip(int fd); 147extern int os_mode_fd(int fd, int mode); 148extern int os_fsync_file(int fd); 149 150extern int os_seek_file(int fd, unsigned long long offset); 151extern int os_open_file(const char *file, struct openflags flags, int mode); 152extern int os_read_file(int fd, void *buf, int len); 153extern int os_write_file(int fd, const void *buf, int count); 154extern int os_sync_file(int fd); 155extern int os_file_size(const char *file, unsigned long long *size_out); 156extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset); 157extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset); 158extern int os_file_modtime(const char *file, long long *modtime); 159extern int os_pipe(int *fd, int stream, int close_on_exec); 160extern int os_set_fd_async(int fd); 161extern int os_clear_fd_async(int fd); 162extern int os_set_fd_block(int fd, int blocking); 163extern int os_accept_connection(int fd); 164extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 165extern int os_shutdown_socket(int fd, int r, int w); 166extern void os_close_file(int fd); 167extern int os_rcv_fd(int fd, int *helper_pid_out); 168extern int os_connect_socket(const char *name); 169extern int os_file_type(char *file); 170extern int os_file_mode(const char *file, struct openflags *mode_out); 171extern int os_lock_file(int fd, int excl); 172extern void os_flush_stdout(void); 173extern unsigned os_major(unsigned long long dev); 174extern unsigned os_minor(unsigned long long dev); 175extern unsigned long long os_makedev(unsigned major, unsigned minor); 176extern int os_falloc_punch(int fd, unsigned long long offset, int count); 177extern int os_falloc_zeroes(int fd, unsigned long long offset, int count); 178extern int os_eventfd(unsigned int initval, int flags); 179extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len, 180 const int *fds, unsigned int fds_num); 181int os_poll(unsigned int n, const int *fds); 182 183/* start_up.c */ 184extern void os_early_checks(void); 185extern void os_check_bugs(void); 186extern void check_host_supports_tls(int *supports_tls, int *tls_min); 187extern void get_host_cpu_features( 188 void (*flags_helper_func)(char *line), 189 void (*cache_helper_func)(char *line)); 190 191/* mem.c */ 192extern int create_mem_file(unsigned long long len); 193 194/* process.c */ 195extern unsigned long os_process_pc(int pid); 196extern int os_process_parent(int pid); 197extern void os_alarm_process(int pid); 198extern void os_stop_process(int pid); 199extern void os_kill_process(int pid, int reap_child); 200extern void os_kill_ptraced_process(int pid, int reap_child); 201 202extern int os_getpid(void); 203extern int os_getpgrp(void); 204 205extern void init_new_thread_signals(void); 206 207extern int os_map_memory(void *virt, int fd, unsigned long long off, 208 unsigned long len, int r, int w, int x); 209extern int os_protect_memory(void *addr, unsigned long len, 210 int r, int w, int x); 211extern int os_unmap_memory(void *addr, int len); 212extern int os_drop_memory(void *addr, int length); 213extern int can_drop_memory(void); 214extern int os_mincore(void *addr, unsigned long len); 215 216/* execvp.c */ 217extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 218/* helper.c */ 219extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); 220extern int run_helper_thread(int (*proc)(void *), void *arg, 221 unsigned int flags, unsigned long *stack_out); 222extern int helper_wait(int pid); 223 224 225/* umid.c */ 226extern int umid_file_name(char *name, char *buf, int len); 227extern int set_umid(char *name); 228extern char *get_umid(void); 229 230/* signal.c */ 231extern void timer_set_signal_handler(void); 232extern void set_sigstack(void *sig_stack, int size); 233extern void set_handler(int sig); 234extern void send_sigio_to_self(void); 235extern int change_sig(int signal, int on); 236extern void block_signals(void); 237extern void unblock_signals(void); 238extern int um_set_signals(int enable); 239extern int um_set_signals_trace(int enable); 240extern int os_is_signal_stack(void); 241extern void deliver_alarm(void); 242extern void register_pm_wake_signal(void); 243extern void block_signals_hard(void); 244extern void unblock_signals_hard(void); 245extern void mark_sigio_pending(void); 246 247/* util.c */ 248extern void stack_protections(unsigned long address); 249extern int raw(int fd); 250extern void setup_machinename(char *machine_out); 251extern void setup_hostinfo(char *buf, int len); 252extern ssize_t os_getrandom(void *buf, size_t len, unsigned int flags); 253extern void os_dump_core(void) __attribute__ ((noreturn)); 254extern void um_early_printk(const char *s, unsigned int n); 255extern void os_fix_helper_signals(void); 256extern void os_info(const char *fmt, ...) 257 __attribute__ ((format (printf, 1, 2))); 258extern void os_warn(const char *fmt, ...) 259 __attribute__ ((format (printf, 1, 2))); 260 261/* time.c */ 262extern void os_idle_sleep(void); 263extern int os_timer_create(void); 264extern int os_timer_set_interval(unsigned long long nsecs); 265extern int os_timer_one_shot(unsigned long long nsecs); 266extern void os_timer_disable(void); 267extern long long os_persistent_clock_emulation(void); 268extern long long os_nsecs(void); 269 270/* skas/mem.c */ 271extern long run_syscall_stub(struct mm_id * mm_idp, 272 int syscall, unsigned long *args, long expected, 273 void **addr, int done); 274extern long syscall_stub_data(struct mm_id * mm_idp, 275 unsigned long *data, int data_count, 276 void **addr, void **stub_addr); 277extern int map(struct mm_id * mm_idp, unsigned long virt, 278 unsigned long len, int prot, int phys_fd, 279 unsigned long long offset, int done, void **data); 280extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, 281 int done, void **data); 282extern int protect(struct mm_id * mm_idp, unsigned long addr, 283 unsigned long len, unsigned int prot, int done, void **data); 284 285/* skas/process.c */ 286extern int is_skas_winch(int pid, int fd, void *data); 287extern int start_userspace(unsigned long stub_stack); 288extern int copy_context_skas0(unsigned long stack, int pid); 289extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs); 290extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 291extern void switch_threads(jmp_buf *me, jmp_buf *you); 292extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 293extern void initial_thread_cb_skas(void (*proc)(void *), 294 void *arg); 295extern void halt_skas(void); 296extern void reboot_skas(void); 297 298/* irq.c */ 299extern int os_waiting_for_events_epoll(void); 300extern void *os_epoll_get_data_pointer(int index); 301extern int os_epoll_triggered(int index, int events); 302extern int os_event_mask(enum um_irq_type irq_type); 303extern int os_setup_epoll(void); 304extern int os_add_epoll_fd(int events, int fd, void *data); 305extern int os_mod_epoll_fd(int events, int fd, void *data); 306extern int os_del_epoll_fd(int fd); 307extern void os_set_ioignore(void); 308extern void os_close_epoll_fd(void); 309extern void um_irqs_suspend(void); 310extern void um_irqs_resume(void); 311 312/* sigio.c */ 313extern int add_sigio_fd(int fd); 314extern int ignore_sigio_fd(int fd); 315extern void maybe_sigio_broken(int fd); 316extern void sigio_broken(int fd); 317/* 318 * unlocked versions for IRQ controller code. 319 * 320 * This is safe because it's used at suspend/resume and nothing 321 * else is running. 322 */ 323extern int __add_sigio_fd(int fd); 324extern int __ignore_sigio_fd(int fd); 325 326/* tty.c */ 327extern int get_pty(void); 328 329/* sys-$ARCH/task_size.c */ 330extern unsigned long os_get_top_address(void); 331 332long syscall(long number, ...); 333 334/* irqflags tracing */ 335extern void block_signals_trace(void); 336extern void unblock_signals_trace(void); 337extern void um_trace_signals_on(void); 338extern void um_trace_signals_off(void); 339 340/* time-travel */ 341extern void deliver_time_travel_irqs(void); 342 343#endif 344