Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 "uml-config.h"
10#include "asm/types.h"
11#include "../os/include/file.h"
12
13#define OS_TYPE_FILE 1
14#define OS_TYPE_DIR 2
15#define OS_TYPE_SYMLINK 3
16#define OS_TYPE_CHARDEV 4
17#define OS_TYPE_BLOCKDEV 5
18#define OS_TYPE_FIFO 6
19#define OS_TYPE_SOCK 7
20
21/* os_access() flags */
22#define OS_ACC_F_OK 0 /* Test for existence. */
23#define OS_ACC_X_OK 1 /* Test for execute permission. */
24#define OS_ACC_W_OK 2 /* Test for write permission. */
25#define OS_ACC_R_OK 4 /* Test for read permission. */
26#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
27
28/*
29 * types taken from stat_file() in hostfs_user.c
30 * (if they are wrong here, they are wrong there...).
31 */
32struct uml_stat {
33 int ust_dev; /* device */
34 unsigned long long ust_ino; /* inode */
35 int ust_mode; /* protection */
36 int ust_nlink; /* number of hard links */
37 int ust_uid; /* user ID of owner */
38 int ust_gid; /* group ID of owner */
39 unsigned long long ust_size; /* total size, in bytes */
40 int ust_blksize; /* blocksize for filesystem I/O */
41 unsigned long long ust_blocks; /* number of blocks allocated */
42 unsigned long ust_atime; /* time of last access */
43 unsigned long ust_mtime; /* time of last modification */
44 unsigned long ust_ctime; /* time of last change */
45};
46
47struct openflags {
48 unsigned int r : 1;
49 unsigned int w : 1;
50 unsigned int s : 1; /* O_SYNC */
51 unsigned int c : 1; /* O_CREAT */
52 unsigned int t : 1; /* O_TRUNC */
53 unsigned int a : 1; /* O_APPEND */
54 unsigned int e : 1; /* O_EXCL */
55 unsigned int cl : 1; /* FD_CLOEXEC */
56};
57
58#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
59 .t = 0, .a = 0, .e = 0, .cl = 0 })
60
61static inline struct openflags of_read(struct openflags flags)
62{
63 flags.r = 1;
64 return(flags);
65}
66
67static inline struct openflags of_write(struct openflags flags)
68{
69 flags.w = 1;
70 return(flags);
71}
72
73static inline struct openflags of_rdwr(struct openflags flags)
74{
75 return(of_read(of_write(flags)));
76}
77
78static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
79{
80 flags.r = r;
81 flags.w = w;
82 return(flags);
83}
84
85static inline struct openflags of_sync(struct openflags flags)
86{
87 flags.s = 1;
88 return(flags);
89}
90
91static inline struct openflags of_create(struct openflags flags)
92{
93 flags.c = 1;
94 return(flags);
95}
96
97static inline struct openflags of_trunc(struct openflags flags)
98{
99 flags.t = 1;
100 return(flags);
101}
102
103static inline struct openflags of_append(struct openflags flags)
104{
105 flags.a = 1;
106 return(flags);
107}
108
109static inline struct openflags of_excl(struct openflags flags)
110{
111 flags.e = 1;
112 return(flags);
113}
114
115static inline struct openflags of_cloexec(struct openflags flags)
116{
117 flags.cl = 1;
118 return(flags);
119}
120
121extern int os_stat_file(const char *file_name, struct uml_stat *buf);
122extern int os_stat_fd(const int fd, struct uml_stat *buf);
123extern int os_access(const char *file, int mode);
124extern void os_print_error(int error, const char* str);
125extern int os_get_exec_close(int fd, int *close_on_exec);
126extern int os_set_exec_close(int fd, int close_on_exec);
127extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
128extern int os_window_size(int fd, int *rows, int *cols);
129extern int os_new_tty_pgrp(int fd, int pid);
130extern int os_get_ifname(int fd, char *namebuf);
131extern int os_set_slip(int fd);
132extern int os_set_owner(int fd, int pid);
133extern int os_sigio_async(int master, int slave);
134extern int os_mode_fd(int fd, int mode);
135
136extern int os_seek_file(int fd, __u64 offset);
137extern int os_open_file(char *file, struct openflags flags, int mode);
138extern int os_read_file(int fd, void *buf, int len);
139extern int os_write_file(int fd, const void *buf, int count);
140extern int os_file_size(char *file, unsigned long long *size_out);
141extern int os_file_modtime(char *file, unsigned long *modtime);
142extern int os_pipe(int *fd, int stream, int close_on_exec);
143extern int os_set_fd_async(int fd, int owner);
144extern int os_clear_fd_async(int fd);
145extern int os_set_fd_block(int fd, int blocking);
146extern int os_accept_connection(int fd);
147extern int os_create_unix_socket(char *file, int len, int close_on_exec);
148extern int os_shutdown_socket(int fd, int r, int w);
149extern void os_close_file(int fd);
150extern int os_rcv_fd(int fd, int *helper_pid_out);
151extern int create_unix_socket(char *file, int len, int close_on_exec);
152extern int os_connect_socket(char *name);
153extern int os_file_type(char *file);
154extern int os_file_mode(char *file, struct openflags *mode_out);
155extern int os_lock_file(int fd, int excl);
156
157/* start_up.c */
158extern void os_early_checks(void);
159extern int can_do_skas(void);
160
161/* Make sure they are clear when running in TT mode. Required by
162 * SEGV_MAYBE_FIXABLE */
163#ifdef UML_CONFIG_MODE_SKAS
164#define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
165#else
166#define clear_can_do_skas() do {} while (0)
167#endif
168
169/* mem.c */
170extern int create_mem_file(unsigned long len);
171
172/* process.c */
173extern unsigned long os_process_pc(int pid);
174extern int os_process_parent(int pid);
175extern void os_stop_process(int pid);
176extern void os_kill_process(int pid, int reap_child);
177extern void os_kill_ptraced_process(int pid, int reap_child);
178extern void os_usr1_process(int pid);
179extern int os_getpid(void);
180extern int os_getpgrp(void);
181extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
182extern void init_new_thread_signals(int altstack);
183extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
184
185extern int os_map_memory(void *virt, int fd, unsigned long long off,
186 unsigned long len, int r, int w, int x);
187extern int os_protect_memory(void *addr, unsigned long len,
188 int r, int w, int x);
189extern int os_unmap_memory(void *addr, int len);
190extern void os_flush_stdout(void);
191extern unsigned long long os_usecs(void);
192
193/* tt.c
194 * for tt mode only (will be deleted in future...)
195 */
196extern int protect_memory(unsigned long addr, unsigned long len,
197 int r, int w, int x, int must_succeed);
198extern void forward_pending_sigio(int target);
199extern int start_fork_tramp(void *arg, unsigned long temp_stack,
200 int clone_flags, int (*tramp)(void *));
201
202#endif
203
204/*
205 * Overrides for Emacs so that we follow Linus's tabbing style.
206 * Emacs will notice this stuff at the end of the file and automatically
207 * adjust the settings for this buffer only. This must remain at the end
208 * of the file.
209 * ---------------------------------------------------------------------------
210 * Local variables:
211 * c-file-style: "linux"
212 * End:
213 */