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TOMOYO Linux Cross Reference
Linux/arch/um/include/shared/os.h

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  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 

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