LXR linux/arch/um/include/shared/os.h

   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 */
  43struct 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
  58struct 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
  72static inline struct openflags of_read(struct openflags flags)
  73{
  74        flags.r = 1;
  75        return flags;
  76}
  77
  78static inline struct openflags of_write(struct openflags flags)
  79{
  80        flags.w = 1;
  81        return flags;
  82}
  83
  84static inline struct openflags of_rdwr(struct openflags flags)
  85{
  86        return of_read(of_write(flags));
  87}
  88
  89static 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
  96static inline struct openflags of_sync(struct openflags flags)
  97{
  98        flags.s = 1;
  99        return flags;
 100}
 101
 102static inline struct openflags of_create(struct openflags flags)
 103{
 104        flags.c = 1;
 105        return flags;
 106}
 107
 108static inline struct openflags of_trunc(struct openflags flags)
 109{
 110        flags.t = 1;
 111        return flags;
 112}
 113
 114static inline struct openflags of_append(struct openflags flags)
 115{
 116        flags.a = 1;
 117        return flags;
 118}
 119
 120static inline struct openflags of_excl(struct openflags flags)
 121{
 122        flags.e = 1;
 123        return flags;
 124}
 125
 126static inline struct openflags of_cloexec(struct openflags flags)
 127{
 128        flags.cl = 1;
 129        return flags;
 130}
 131
 132/* file.c */
 133extern int os_stat_file(const char *file_name, struct uml_stat *buf);
 134extern int os_stat_fd(const int fd, struct uml_stat *buf);
 135extern int os_access(const char *file, int mode);
 136extern int os_set_exec_close(int fd);
 137extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
 138extern int os_get_ifname(int fd, char *namebuf);
 139extern int os_set_slip(int fd);
 140extern int os_mode_fd(int fd, int mode);
 141extern int os_fsync_file(int fd);
 142
 143extern int os_seek_file(int fd, unsigned long long offset);
 144extern int os_open_file(const char *file, struct openflags flags, int mode);
 145extern int os_read_file(int fd, void *buf, int len);
 146extern int os_write_file(int fd, const void *buf, int count);
 147extern int os_sync_file(int fd);
 148extern int os_file_size(const char *file, unsigned long long *size_out);
 149extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
 150extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
 151extern int os_file_modtime(const char *file, unsigned long *modtime);
 152extern int os_pipe(int *fd, int stream, int close_on_exec);
 153extern int os_set_fd_async(int fd);
 154extern int os_clear_fd_async(int fd);
 155extern int os_set_fd_block(int fd, int blocking);
 156extern int os_accept_connection(int fd);
 157extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
 158extern int os_shutdown_socket(int fd, int r, int w);
 159extern void os_close_file(int fd);
 160extern int os_rcv_fd(int fd, int *helper_pid_out);
 161extern int create_unix_socket(char *file, int len, int close_on_exec);
 162extern int os_connect_socket(const char *name);
 163extern int os_file_type(char *file);
 164extern int os_file_mode(const char *file, struct openflags *mode_out);
 165extern int os_lock_file(int fd, int excl);
 166extern void os_flush_stdout(void);
 167extern 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);
 173extern int os_change_dir(char *dir);
 174extern int os_fchange_dir(int fd);
 175extern unsigned os_major(unsigned long long dev);
 176extern unsigned os_minor(unsigned long long dev);
 177extern unsigned long long os_makedev(unsigned major, unsigned minor);
 178
 179/* start_up.c */
 180extern void os_early_checks(void);
 181extern void os_check_bugs(void);
 182extern void check_host_supports_tls(int *supports_tls, int *tls_min);
 183
 184/* mem.c */
 185extern int create_mem_file(unsigned long long len);
 186
 187/* process.c */
 188extern unsigned long os_process_pc(int pid);
 189extern int os_process_parent(int pid);
 190extern void os_alarm_process(int pid);
 191extern void os_stop_process(int pid);
 192extern void os_kill_process(int pid, int reap_child);
 193extern void os_kill_ptraced_process(int pid, int reap_child);
 194
 195extern int os_getpid(void);
 196extern int os_getpgrp(void);
 197
 198extern void init_new_thread_signals(void);
 199
 200extern int os_map_memory(void *virt, int fd, unsigned long long off,
 201                         unsigned long len, int r, int w, int x);
 202extern int os_protect_memory(void *addr, unsigned long len,
 203                             int r, int w, int x);
 204extern int os_unmap_memory(void *addr, int len);
 205extern int os_drop_memory(void *addr, int length);
 206extern int can_drop_memory(void);
 207extern void os_flush_stdout(void);
 208extern int os_mincore(void *addr, unsigned long len);
 209
 210/* execvp.c */
 211extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
 212/* helper.c */
 213extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
 214extern int run_helper_thread(int (*proc)(void *), void *arg,
 215                             unsigned int flags, unsigned long *stack_out);
 216extern int helper_wait(int pid);
 217
 218
 219/* umid.c */
 220extern int umid_file_name(char *name, char *buf, int len);
 221extern int set_umid(char *name);
 222extern char *get_umid(void);
 223
 224/* signal.c */
 225extern void timer_set_signal_handler(void);
 226extern void set_sigstack(void *sig_stack, int size);
 227extern void remove_sigstack(void);
 228extern void set_handler(int sig);
 229extern int change_sig(int signal, int on);
 230extern void block_signals(void);
 231extern void unblock_signals(void);
 232extern int get_signals(void);
 233extern int set_signals(int enable);
 234extern int os_is_signal_stack(void);
 235extern void deliver_alarm(void);
 236
 237/* util.c */
 238extern void stack_protections(unsigned long address);
 239extern int raw(int fd);
 240extern void setup_machinename(char *machine_out);
 241extern void setup_hostinfo(char *buf, int len);
 242extern void os_dump_core(void) __attribute__ ((noreturn));
 243extern void um_early_printk(const char *s, unsigned int n);
 244extern void os_fix_helper_signals(void);
 245extern void os_info(const char *fmt, ...)
 246        __attribute__ ((format (printf, 1, 2)));
 247extern void os_warn(const char *fmt, ...)
 248        __attribute__ ((format (printf, 1, 2)));
 249
 250/* time.c */
 251extern void os_idle_sleep(unsigned long long nsecs);
 252extern int os_timer_create(void* timer);
 253extern int os_timer_set_interval(void* timer, void* its);
 254extern int os_timer_one_shot(int ticks);
 255extern long long os_timer_disable(void);
 256extern long os_timer_remain(void* timer);
 257extern void uml_idle_timer(void);
 258extern long long os_persistent_clock_emulation(void);
 259extern long long os_nsecs(void);
 260extern long long os_vnsecs(void);
 261
 262/* skas/mem.c */
 263extern long run_syscall_stub(struct mm_id * mm_idp,
 264                             int syscall, unsigned long *args, long expected,
 265                             void **addr, int done);
 266extern long syscall_stub_data(struct mm_id * mm_idp,
 267                              unsigned long *data, int data_count,
 268                              void **addr, void **stub_addr);
 269extern int map(struct mm_id * mm_idp, unsigned long virt,
 270               unsigned long len, int prot, int phys_fd,
 271               unsigned long long offset, int done, void **data);
 272extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
 273                 int done, void **data);
 274extern int protect(struct mm_id * mm_idp, unsigned long addr,
 275                   unsigned long len, unsigned int prot, int done, void **data);
 276
 277/* skas/process.c */
 278extern int is_skas_winch(int pid, int fd, void *data);
 279extern int start_userspace(unsigned long stub_stack);
 280extern int copy_context_skas0(unsigned long stack, int pid);
 281extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
 282extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
 283                          unsigned long stack);
 284extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
 285extern void switch_threads(jmp_buf *me, jmp_buf *you);
 286extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
 287extern void initial_thread_cb_skas(void (*proc)(void *),
 288                                 void *arg);
 289extern void halt_skas(void);
 290extern void reboot_skas(void);
 291
 292/* irq.c */
 293extern int os_waiting_for_events(struct irq_fd *active_fds);
 294extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
 295extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
 296                struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
 297extern void os_free_irq_later(struct irq_fd *active_fds,
 298                int irq, void *dev_id);
 299extern int os_get_pollfd(int i);
 300extern void os_set_pollfd(int i, int fd);
 301extern void os_set_ioignore(void);
 302
 303/* sigio.c */
 304extern int add_sigio_fd(int fd);
 305extern int ignore_sigio_fd(int fd);
 306extern void maybe_sigio_broken(int fd, int read);
 307extern void sigio_broken(int fd, int read);
 308
 309/* prctl.c */
 310extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
 311
 312/* tty.c */
 313extern int get_pty(void);
 314
 315/* sys-$ARCH/task_size.c */
 316extern unsigned long os_get_top_address(void);
 317
 318long syscall(long number, ...);
 319
 320#endif
 321