arch/um/include/os.h

   1 /*
   2  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __OS_H__
   7 #define __OS_H__
   8
   9 #include "asm/types.h"
  10 #include "../os/include/file.h"
  11
  12 #define OS_TYPE_FILE 1
  13 #define OS_TYPE_DIR 2
  14 #define OS_TYPE_SYMLINK 3
  15 #define OS_TYPE_CHARDEV 4
  16 #define OS_TYPE_BLOCKDEV 5
  17 #define OS_TYPE_FIFO 6
  18 #define OS_TYPE_SOCK 7
  19
  20 /* os_access() flags */
  21 #define OS_ACC_F_OK    0       /* Test for existence.  */
  22 #define OS_ACC_X_OK    1       /* Test for execute permission.  */
  23 #define OS_ACC_W_OK    2       /* Test for write permission.  */
  24 #define OS_ACC_R_OK    4       /* Test for read permission.  */
  25 #define OS_ACC_RW_OK   (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
  26
  27 /*
  28  * types taken from stat_file() in hostfs_user.c
  29  * (if they are wrong here, they are wrong there...).
  30  */
  31 struct uml_stat {
  32         int                ust_dev;        /* device */
  33         unsigned long long ust_ino;        /* inode */
  34         int                ust_mode;       /* protection */
  35         int                ust_nlink;      /* number of hard links */
  36         int                ust_uid;        /* user ID of owner */
  37         int                ust_gid;        /* group ID of owner */
  38         unsigned long long ust_size;       /* total size, in bytes */
  39         int                ust_blksize;    /* blocksize for filesystem I/O */
  40         unsigned long long ust_blocks;     /* number of blocks allocated */
  41         unsigned long      ust_atime;      /* time of last access */
  42         unsigned long      ust_mtime;      /* time of last modification */
  43         unsigned long      ust_ctime;      /* time of last change */
  44 };
  45
  46 struct openflags {
  47         unsigned int r : 1;
  48         unsigned int w : 1;
  49         unsigned int s : 1;     /* O_SYNC */
  50         unsigned int c : 1;     /* O_CREAT */
  51         unsigned int t : 1;     /* O_TRUNC */
  52         unsigned int a : 1;     /* O_APPEND */
  53         unsigned int e : 1;     /* O_EXCL */
  54         unsigned int cl : 1;    /* FD_CLOEXEC */
  55 };
  56
  57 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
  58                                           .t = 0, .a = 0, .e = 0, .cl = 0 })
  59
  60 static inline struct openflags of_read(struct openflags flags)
  61 {
  62         flags.r = 1;
  63         return(flags);
  64 }
  65
  66 static inline struct openflags of_write(struct openflags flags)
  67 {
  68         flags.w = 1;
  69         return(flags);
  70 }
  71
  72 static inline struct openflags of_rdwr(struct openflags flags)
  73 {
  74         return(of_read(of_write(flags)));
  75 }
  76
  77 static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
  78 {
  79         flags.r = r;
  80         flags.w = w;
  81         return(flags);
  82 }
  83
  84 static inline struct openflags of_sync(struct openflags flags)
  85 {
  86         flags.s = 1;
  87         return(flags);
  88 }
  89
  90 static inline struct openflags of_create(struct openflags flags)
  91 {
  92         flags.c = 1;
  93         return(flags);
  94 }
  95
  96 static inline struct openflags of_trunc(struct openflags flags)
  97 {
  98         flags.t = 1;
  99         return(flags);
 100 }
 101
 102 static inline struct openflags of_append(struct openflags flags)
 103 {
 104         flags.a = 1;
 105         return(flags);
 106 }
 107
 108 static inline struct openflags of_excl(struct openflags flags)
 109 {
 110         flags.e = 1;
 111         return(flags);
 112 }
 113
 114 static inline struct openflags of_cloexec(struct openflags flags)
 115 {
 116         flags.cl = 1;
 117         return(flags);
 118 }
 119
 120 extern int os_stat_file(const char *file_name, struct uml_stat *buf);
 121 extern int os_stat_fd(const int fd, struct uml_stat *buf);
 122 extern int os_access(const char *file, int mode);
 123 extern void os_print_error(int error, const char* str);
 124 extern int os_get_exec_close(int fd, int *close_on_exec);
 125 extern int os_set_exec_close(int fd, int close_on_exec);
 126 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
 127 extern int os_window_size(int fd, int *rows, int *cols);
 128 extern int os_new_tty_pgrp(int fd, int pid);
 129 extern int os_get_ifname(int fd, char *namebuf);
 130 extern int os_set_slip(int fd);
 131 extern int os_set_owner(int fd, int pid);
 132 extern int os_sigio_async(int master, int slave);
 133 extern int os_mode_fd(int fd, int mode);
 134
 135 extern int os_seek_file(int fd, __u64 offset);
 136 extern int os_open_file(char *file, struct openflags flags, int mode);
 137 extern int os_read_file(int fd, void *buf, int len);
 138 extern int os_write_file(int fd, const void *buf, int count);
 139 extern int os_file_size(char *file, unsigned long long *size_out);
 140 extern int os_file_modtime(char *file, unsigned long *modtime);
 141 extern int os_pipe(int *fd, int stream, int close_on_exec);
 142 extern int os_set_fd_async(int fd, int owner);
 143 extern int os_clear_fd_async(int fd);
 144 extern int os_set_fd_block(int fd, int blocking);
 145 extern int os_accept_connection(int fd);
 146 extern int os_create_unix_socket(char *file, int len, int close_on_exec);
 147 extern int os_shutdown_socket(int fd, int r, int w);
 148 extern void os_close_file(int fd);
 149 extern int os_rcv_fd(int fd, int *helper_pid_out);
 150 extern int create_unix_socket(char *file, int len, int close_on_exec);
 151 extern int os_connect_socket(char *name);
 152 extern int os_file_type(char *file);
 153 extern int os_file_mode(char *file, struct openflags *mode_out);
 154 extern int os_lock_file(int fd, int excl);
 155
 156 /* start_up.c */
 157 extern void os_early_checks(void);
 158 extern int can_do_skas(void);
 159
 160 /* Make sure they are clear when running in TT mode. Required by
 161  * SEGV_MAYBE_FIXABLE */
 162 #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
 163
 164 /* mem.c */
 165 extern int create_mem_file(unsigned long len);
 166
 167 /* process.c */
 168 extern unsigned long os_process_pc(int pid);
 169 extern int os_process_parent(int pid);
 170 extern void os_stop_process(int pid);
 171 extern void os_kill_process(int pid, int reap_child);
 172 extern void os_kill_ptraced_process(int pid, int reap_child);
 173 extern void os_usr1_process(int pid);
 174 extern int os_getpid(void);
 175 extern int os_getpgrp(void);
 176 extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
 177 extern void init_new_thread_signals(int altstack);
 178 extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
 179
 180 extern int os_map_memory(void *virt, int fd, unsigned long long off,
 181                          unsigned long len, int r, int w, int x);
 182 extern int os_protect_memory(void *addr, unsigned long len,
 183                              int r, int w, int x);
 184 extern int os_unmap_memory(void *addr, int len);
 185 extern void os_flush_stdout(void);
 186 extern unsigned long long os_usecs(void);
 187
 188 /* tt.c
 189  * for tt mode only (will be deleted in future...)
 190  */
 191 extern int protect_memory(unsigned long addr, unsigned long len,
 192                           int r, int w, int x, int must_succeed);
 193 extern void forward_pending_sigio(int target);
 194 extern int start_fork_tramp(void *arg, unsigned long temp_stack,
 195                             int clone_flags, int (*tramp)(void *));
 196
 197 #endif
 198
 199 /*
 200  * Overrides for Emacs so that we follow Linus's tabbing style.
 201  * Emacs will notice this stuff at the end of the file and automatically
 202  * adjust the settings for this buffer only.  This must remain at the end
 203  * of the file.
 204  * ---------------------------------------------------------------------------
 205  * Local variables:
 206  * c-file-style: "linux"
 207  * End:
 208  */