Line data Source code
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 0 : flags.r = 1;
82 0 : return flags;
83 : }
84 :
85 : static inline struct openflags of_write(struct openflags flags)
86 : {
87 0 : flags.w = 1;
88 0 : 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 : extern int os_fsync_file(int fd);
149 :
150 : extern int os_seek_file(int fd, unsigned long long offset);
151 : extern int os_open_file(const char *file, struct openflags flags, int mode);
152 : extern int os_read_file(int fd, void *buf, int len);
153 : extern int os_write_file(int fd, const void *buf, int count);
154 : extern int os_sync_file(int fd);
155 : extern int os_file_size(const char *file, unsigned long long *size_out);
156 : extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
157 : extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
158 : extern int os_file_modtime(const char *file, long long *modtime);
159 : extern int os_pipe(int *fd, int stream, int close_on_exec);
160 : extern int os_set_fd_async(int fd);
161 : extern int os_clear_fd_async(int fd);
162 : extern int os_set_fd_block(int fd, int blocking);
163 : extern int os_accept_connection(int fd);
164 : extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
165 : extern int os_shutdown_socket(int fd, int r, int w);
166 : extern void os_close_file(int fd);
167 : extern int os_rcv_fd(int fd, int *helper_pid_out);
168 : extern int os_connect_socket(const char *name);
169 : extern int os_file_type(char *file);
170 : extern int os_file_mode(const char *file, struct openflags *mode_out);
171 : extern int os_lock_file(int fd, int excl);
172 : extern void os_flush_stdout(void);
173 : extern unsigned os_major(unsigned long long dev);
174 : extern unsigned os_minor(unsigned long long dev);
175 : extern unsigned long long os_makedev(unsigned major, unsigned minor);
176 : extern int os_falloc_punch(int fd, unsigned long long offset, int count);
177 : extern int os_falloc_zeroes(int fd, unsigned long long offset, int count);
178 : extern int os_eventfd(unsigned int initval, int flags);
179 : extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
180 : const int *fds, unsigned int fds_num);
181 : int os_poll(unsigned int n, const int *fds);
182 :
183 : /* start_up.c */
184 : extern void os_early_checks(void);
185 : extern void os_check_bugs(void);
186 : extern void check_host_supports_tls(int *supports_tls, int *tls_min);
187 : extern void get_host_cpu_features(
188 : void (*flags_helper_func)(char *line),
189 : void (*cache_helper_func)(char *line));
190 :
191 : /* mem.c */
192 : extern int create_mem_file(unsigned long long len);
193 :
194 : /* process.c */
195 : extern unsigned long os_process_pc(int pid);
196 : extern int os_process_parent(int pid);
197 : extern void os_alarm_process(int pid);
198 : extern void os_stop_process(int pid);
199 : extern void os_kill_process(int pid, int reap_child);
200 : extern void os_kill_ptraced_process(int pid, int reap_child);
201 :
202 : extern int os_getpid(void);
203 : extern int os_getpgrp(void);
204 :
205 : extern void init_new_thread_signals(void);
206 :
207 : extern int os_map_memory(void *virt, int fd, unsigned long long off,
208 : unsigned long len, int r, int w, int x);
209 : extern int os_protect_memory(void *addr, unsigned long len,
210 : int r, int w, int x);
211 : extern int os_unmap_memory(void *addr, int len);
212 : extern int os_drop_memory(void *addr, int length);
213 : extern int can_drop_memory(void);
214 : extern int os_mincore(void *addr, unsigned long len);
215 :
216 : /* execvp.c */
217 : extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
218 : /* helper.c */
219 : extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
220 : extern int run_helper_thread(int (*proc)(void *), void *arg,
221 : unsigned int flags, unsigned long *stack_out);
222 : extern int helper_wait(int pid);
223 :
224 :
225 : /* umid.c */
226 : extern int umid_file_name(char *name, char *buf, int len);
227 : extern int set_umid(char *name);
228 : extern char *get_umid(void);
229 :
230 : /* signal.c */
231 : extern void timer_set_signal_handler(void);
232 : extern void set_sigstack(void *sig_stack, int size);
233 : extern void set_handler(int sig);
234 : extern void send_sigio_to_self(void);
235 : extern int change_sig(int signal, int on);
236 : extern void block_signals(void);
237 : extern void unblock_signals(void);
238 : extern int um_set_signals(int enable);
239 : extern int um_set_signals_trace(int enable);
240 : extern int os_is_signal_stack(void);
241 : extern void deliver_alarm(void);
242 : extern void register_pm_wake_signal(void);
243 : extern void block_signals_hard(void);
244 : extern void unblock_signals_hard(void);
245 : extern void mark_sigio_pending(void);
246 :
247 : /* util.c */
248 : extern void stack_protections(unsigned long address);
249 : extern int raw(int fd);
250 : extern void setup_machinename(char *machine_out);
251 : extern void setup_hostinfo(char *buf, int len);
252 : extern ssize_t os_getrandom(void *buf, size_t len, unsigned int flags);
253 : extern void os_dump_core(void) __attribute__ ((noreturn));
254 : extern void um_early_printk(const char *s, unsigned int n);
255 : extern void os_fix_helper_signals(void);
256 : extern void os_info(const char *fmt, ...)
257 : __attribute__ ((format (printf, 1, 2)));
258 : extern void os_warn(const char *fmt, ...)
259 : __attribute__ ((format (printf, 1, 2)));
260 :
261 : /* time.c */
262 : extern void os_idle_sleep(void);
263 : extern int os_timer_create(void);
264 : extern int os_timer_set_interval(unsigned long long nsecs);
265 : extern int os_timer_one_shot(unsigned long long nsecs);
266 : extern void os_timer_disable(void);
267 : extern long long os_persistent_clock_emulation(void);
268 : extern long long os_nsecs(void);
269 :
270 : /* skas/mem.c */
271 : extern long run_syscall_stub(struct mm_id * mm_idp,
272 : int syscall, unsigned long *args, long expected,
273 : void **addr, int done);
274 : extern long syscall_stub_data(struct mm_id * mm_idp,
275 : unsigned long *data, int data_count,
276 : void **addr, void **stub_addr);
277 : extern 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);
280 : extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
281 : int done, void **data);
282 : extern 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 */
286 : extern int is_skas_winch(int pid, int fd, void *data);
287 : extern int start_userspace(unsigned long stub_stack);
288 : extern int copy_context_skas0(unsigned long stack, int pid);
289 : extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
290 : extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
291 : extern void switch_threads(jmp_buf *me, jmp_buf *you);
292 : extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
293 : extern void initial_thread_cb_skas(void (*proc)(void *),
294 : void *arg);
295 : extern void halt_skas(void);
296 : extern void reboot_skas(void);
297 :
298 : /* irq.c */
299 : extern int os_waiting_for_events_epoll(void);
300 : extern void *os_epoll_get_data_pointer(int index);
301 : extern int os_epoll_triggered(int index, int events);
302 : extern int os_event_mask(enum um_irq_type irq_type);
303 : extern int os_setup_epoll(void);
304 : extern int os_add_epoll_fd(int events, int fd, void *data);
305 : extern int os_mod_epoll_fd(int events, int fd, void *data);
306 : extern int os_del_epoll_fd(int fd);
307 : extern void os_set_ioignore(void);
308 : extern void os_close_epoll_fd(void);
309 : extern void um_irqs_suspend(void);
310 : extern void um_irqs_resume(void);
311 :
312 : /* sigio.c */
313 : extern int add_sigio_fd(int fd);
314 : extern int ignore_sigio_fd(int fd);
315 : extern void maybe_sigio_broken(int fd);
316 : extern 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 : */
323 : extern int __add_sigio_fd(int fd);
324 : extern int __ignore_sigio_fd(int fd);
325 :
326 : /* prctl.c */
327 : extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
328 :
329 : /* tty.c */
330 : extern int get_pty(void);
331 :
332 : /* sys-$ARCH/task_size.c */
333 : extern unsigned long os_get_top_address(void);
334 :
335 : long syscall(long number, ...);
336 :
337 : /* irqflags tracing */
338 : extern void block_signals_trace(void);
339 : extern void unblock_signals_trace(void);
340 : extern void um_trace_signals_on(void);
341 : extern void um_trace_signals_off(void);
342 :
343 : /* time-travel */
344 : extern void deliver_time_travel_irqs(void);
345 :
346 : #endif
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