1 /* 2 * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk}) 3 * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de) 4 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 5 * Licensed under the GPL 6 */ 7 8 #ifndef __OS_H__ 9 #define __OS_H__ 10 11 #include <stdarg.h> 12 #include <irq_user.h> 13 #include <longjmp.h> 14 #include <mm_id.h> 15 16 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) 17 18 #define OS_TYPE_FILE 1 19 #define OS_TYPE_DIR 2 20 #define OS_TYPE_SYMLINK 3 21 #define OS_TYPE_CHARDEV 4 22 #define OS_TYPE_BLOCKDEV 5 23 #define OS_TYPE_FIFO 6 24 #define OS_TYPE_SOCK 7 25 26 /* os_access() flags */ 27 #define OS_ACC_F_OK 0 /* Test for existence. */ 28 #define OS_ACC_X_OK 1 /* Test for execute permission. */ 29 #define OS_ACC_W_OK 2 /* Test for write permission. */ 30 #define OS_ACC_R_OK 4 /* Test for read permission. */ 31 #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */ 32 33 #ifdef CONFIG_64BIT 34 #define OS_LIB_PATH "/usr/lib64/" 35 #else 36 #define OS_LIB_PATH "/usr/lib/" 37 #endif 38 39 /* 40 * types taken from stat_file() in hostfs_user.c 41 * (if they are wrong here, they are wrong there...). 42 */ 43 struct uml_stat { 44 int ust_dev; /* device */ 45 unsigned long long ust_ino; /* inode */ 46 int ust_mode; /* protection */ 47 int ust_nlink; /* number of hard links */ 48 int ust_uid; /* user ID of owner */ 49 int ust_gid; /* group ID of owner */ 50 unsigned long long ust_size; /* total size, in bytes */ 51 int ust_blksize; /* blocksize for filesystem I/O */ 52 unsigned long long ust_blocks; /* number of blocks allocated */ 53 unsigned long ust_atime; /* time of last access */ 54 unsigned long ust_mtime; /* time of last modification */ 55 unsigned long ust_ctime; /* time of last change */ 56 }; 57 58 struct openflags { 59 unsigned int r : 1; 60 unsigned int w : 1; 61 unsigned int s : 1; /* O_SYNC */ 62 unsigned int c : 1; /* O_CREAT */ 63 unsigned int t : 1; /* O_TRUNC */ 64 unsigned int a : 1; /* O_APPEND */ 65 unsigned int e : 1; /* O_EXCL */ 66 unsigned int cl : 1; /* FD_CLOEXEC */ 67 }; 68 69 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ 70 .t = 0, .a = 0, .e = 0, .cl = 0 }) 71 72 static inline struct openflags of_read(struct openflags flags) 73 { 74 flags.r = 1; 75 return flags; 76 } 77 78 static inline struct openflags of_write(struct openflags flags) 79 { 80 flags.w = 1; 81 return flags; 82 } 83 84 static inline struct openflags of_rdwr(struct openflags flags) 85 { 86 return of_read(of_write(flags)); 87 } 88 89 static inline struct openflags of_set_rw(struct openflags flags, int r, int w) 90 { 91 flags.r = r; 92 flags.w = w; 93 return flags; 94 } 95 96 static inline struct openflags of_sync(struct openflags flags) 97 { 98 flags.s = 1; 99 return flags; 100 } 101 102 static inline struct openflags of_create(struct openflags flags) 103 { 104 flags.c = 1; 105 return flags; 106 } 107 108 static inline struct openflags of_trunc(struct openflags flags) 109 { 110 flags.t = 1; 111 return flags; 112 } 113 114 static inline struct openflags of_append(struct openflags flags) 115 { 116 flags.a = 1; 117 return flags; 118 } 119 120 static inline struct openflags of_excl(struct openflags flags) 121 { 122 flags.e = 1; 123 return flags; 124 } 125 126 static inline struct openflags of_cloexec(struct openflags flags) 127 { 128 flags.cl = 1; 129 return flags; 130 } 131 132 /* file.c */ 133 extern int os_stat_file(const char *file_name, struct uml_stat *buf); 134 extern int os_stat_fd(const int fd, struct uml_stat *buf); 135 extern int os_access(const char *file, int mode); 136 extern int os_set_exec_close(int fd); 137 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 138 extern int os_get_ifname(int fd, char *namebuf); 139 extern int os_set_slip(int fd); 140 extern int os_mode_fd(int fd, int mode); 141 extern int os_fsync_file(int fd); 142 143 extern int os_seek_file(int fd, unsigned long long offset); 144 extern int os_open_file(const char *file, struct openflags flags, int mode); 145 extern int os_read_file(int fd, void *buf, int len); 146 extern int os_write_file(int fd, const void *buf, int count); 147 extern int os_sync_file(int fd); 148 extern int os_file_size(const char *file, unsigned long long *size_out); 149 extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset); 150 extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset); 151 extern int os_file_modtime(const char *file, unsigned long *modtime); 152 extern int os_pipe(int *fd, int stream, int close_on_exec); 153 extern int os_set_fd_async(int fd); 154 extern int os_clear_fd_async(int fd); 155 extern int os_set_fd_block(int fd, int blocking); 156 extern int os_accept_connection(int fd); 157 extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 158 extern int os_shutdown_socket(int fd, int r, int w); 159 extern void os_close_file(int fd); 160 extern int os_rcv_fd(int fd, int *helper_pid_out); 161 extern int create_unix_socket(char *file, int len, int close_on_exec); 162 extern int os_connect_socket(const char *name); 163 extern int os_file_type(char *file); 164 extern int os_file_mode(const char *file, struct openflags *mode_out); 165 extern int os_lock_file(int fd, int excl); 166 extern void os_flush_stdout(void); 167 extern int os_stat_filesystem(char *path, long *bsize_out, 168 long long *blocks_out, long long *bfree_out, 169 long long *bavail_out, long long *files_out, 170 long long *ffree_out, void *fsid_out, 171 int fsid_size, long *namelen_out, 172 long *spare_out); 173 extern int os_change_dir(char *dir); 174 extern int os_fchange_dir(int fd); 175 extern unsigned os_major(unsigned long long dev); 176 extern unsigned os_minor(unsigned long long dev); 177 extern unsigned long long os_makedev(unsigned major, unsigned minor); 178 179 /* start_up.c */ 180 extern void os_early_checks(void); 181 extern void os_check_bugs(void); 182 extern void check_host_supports_tls(int *supports_tls, int *tls_min); 183 184 /* mem.c */ 185 extern int create_mem_file(unsigned long long len); 186 187 /* process.c */ 188 extern unsigned long os_process_pc(int pid); 189 extern int os_process_parent(int pid); 190 extern void os_alarm_process(int pid); 191 extern void os_stop_process(int pid); 192 extern void os_kill_process(int pid, int reap_child); 193 extern void os_kill_ptraced_process(int pid, int reap_child); 194 195 extern int os_getpid(void); 196 extern int os_getpgrp(void); 197 198 extern void init_new_thread_signals(void); 199 200 extern int os_map_memory(void *virt, int fd, unsigned long long off, 201 unsigned long len, int r, int w, int x); 202 extern int os_protect_memory(void *addr, unsigned long len, 203 int r, int w, int x); 204 extern int os_unmap_memory(void *addr, int len); 205 extern int os_drop_memory(void *addr, int length); 206 extern int can_drop_memory(void); 207 extern void os_flush_stdout(void); 208 extern int os_mincore(void *addr, unsigned long len); 209 210 /* execvp.c */ 211 extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 212 /* helper.c */ 213 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); 214 extern int run_helper_thread(int (*proc)(void *), void *arg, 215 unsigned int flags, unsigned long *stack_out); 216 extern int helper_wait(int pid); 217 218 219 /* umid.c */ 220 extern int umid_file_name(char *name, char *buf, int len); 221 extern int set_umid(char *name); 222 extern char *get_umid(void); 223 224 /* signal.c */ 225 extern void timer_set_signal_handler(void); 226 extern void set_sigstack(void *sig_stack, int size); 227 extern void remove_sigstack(void); 228 extern void set_handler(int sig); 229 extern int change_sig(int signal, int on); 230 extern void block_signals(void); 231 extern void unblock_signals(void); 232 extern int get_signals(void); 233 extern int set_signals(int enable); 234 extern int os_is_signal_stack(void); 235 extern void deliver_alarm(void); 236 237 /* util.c */ 238 extern void stack_protections(unsigned long address); 239 extern int raw(int fd); 240 extern void setup_machinename(char *machine_out); 241 extern void setup_hostinfo(char *buf, int len); 242 extern void os_dump_core(void) __attribute__ ((noreturn)); 243 extern void um_early_printk(const char *s, unsigned int n); 244 extern void os_fix_helper_signals(void); 245 246 /* time.c */ 247 extern void os_idle_sleep(unsigned long long nsecs); 248 extern int os_timer_create(void* timer); 249 extern int os_timer_set_interval(void* timer, void* its); 250 extern int os_timer_one_shot(int ticks); 251 extern long long os_timer_disable(void); 252 extern long os_timer_remain(void* timer); 253 extern void uml_idle_timer(void); 254 extern long long os_persistent_clock_emulation(void); 255 extern long long os_nsecs(void); 256 extern long long os_vnsecs(void); 257 258 /* skas/mem.c */ 259 extern long run_syscall_stub(struct mm_id * mm_idp, 260 int syscall, unsigned long *args, long expected, 261 void **addr, int done); 262 extern long syscall_stub_data(struct mm_id * mm_idp, 263 unsigned long *data, int data_count, 264 void **addr, void **stub_addr); 265 extern int map(struct mm_id * mm_idp, unsigned long virt, 266 unsigned long len, int prot, int phys_fd, 267 unsigned long long offset, int done, void **data); 268 extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, 269 int done, void **data); 270 extern int protect(struct mm_id * mm_idp, unsigned long addr, 271 unsigned long len, unsigned int prot, int done, void **data); 272 273 /* skas/process.c */ 274 extern int is_skas_winch(int pid, int fd, void *data); 275 extern int start_userspace(unsigned long stub_stack); 276 extern int copy_context_skas0(unsigned long stack, int pid); 277 extern void userspace(struct uml_pt_regs *regs); 278 extern int map_stub_pages(int fd, unsigned long code, unsigned long data, 279 unsigned long stack); 280 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 281 extern void switch_threads(jmp_buf *me, jmp_buf *you); 282 extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 283 extern void initial_thread_cb_skas(void (*proc)(void *), 284 void *arg); 285 extern void halt_skas(void); 286 extern void reboot_skas(void); 287 288 /* irq.c */ 289 extern int os_waiting_for_events(struct irq_fd *active_fds); 290 extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds); 291 extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, 292 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2); 293 extern void os_free_irq_later(struct irq_fd *active_fds, 294 int irq, void *dev_id); 295 extern int os_get_pollfd(int i); 296 extern void os_set_pollfd(int i, int fd); 297 extern void os_set_ioignore(void); 298 299 /* sigio.c */ 300 extern int add_sigio_fd(int fd); 301 extern int ignore_sigio_fd(int fd); 302 extern void maybe_sigio_broken(int fd, int read); 303 extern void sigio_broken(int fd, int read); 304 305 /* sys-x86_64/prctl.c */ 306 extern int os_arch_prctl(int pid, int code, unsigned long *addr); 307 308 /* tty.c */ 309 extern int get_pty(void); 310 311 /* sys-$ARCH/task_size.c */ 312 extern unsigned long os_get_top_address(void); 313 314 long syscall(long number, ...); 315 316 #endif 317