vfs, fdtable: Prevent bounds-check bypass via speculative execution
[pandora-kernel.git] / include / linux / cn_proc.h
1 /*
2  * cn_proc.h - process events connector
3  *
4  * Copyright (C) Matt Helsley, IBM Corp. 2005
5  * Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin
6  * Copyright (C) 2005 Nguyen Anh Quynh <aquynh@gmail.com>
7  * Copyright (C) 2005 Guillaume Thouvenin <guillaume.thouvenin@bull.net>
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of version 2.1 of the GNU Lesser General Public License
11  * as published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it would be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16  */
17
18 #ifndef CN_PROC_H
19 #define CN_PROC_H
20
21 #include <linux/types.h>
22
23 /*
24  * Userspace sends this enum to register with the kernel that it is listening
25  * for events on the connector.
26  */
27 enum proc_cn_mcast_op {
28         PROC_CN_MCAST_LISTEN = 1,
29         PROC_CN_MCAST_IGNORE = 2
30 };
31
32 /*
33  * From the user's point of view, the process
34  * ID is the thread group ID and thread ID is the internal
35  * kernel "pid". So, fields are assigned as follow:
36  *
37  *  In user space     -  In  kernel space
38  *
39  * parent process ID  =  parent->tgid
40  * parent thread  ID  =  parent->pid
41  * child  process ID  =  child->tgid
42  * child  thread  ID  =  child->pid
43  */
44
45 struct proc_event {
46         enum what {
47                 /* Use successive bits so the enums can be used to record
48                  * sets of events as well
49                  */
50                 PROC_EVENT_NONE = 0x00000000,
51                 PROC_EVENT_FORK = 0x00000001,
52                 PROC_EVENT_EXEC = 0x00000002,
53                 PROC_EVENT_UID  = 0x00000004,
54                 PROC_EVENT_GID  = 0x00000040,
55                 PROC_EVENT_SID  = 0x00000080,
56                 PROC_EVENT_PTRACE = 0x00000100,
57                 PROC_EVENT_COMM = 0x00000200,
58                 /* "next" should be 0x00000400 */
59                 /* "last" is the last process event: exit */
60                 PROC_EVENT_EXIT = 0x80000000
61         } what;
62         __u32 cpu;
63         __u64 __attribute__((aligned(8))) timestamp_ns;
64                 /* Number of nano seconds since system boot */
65         union { /* must be last field of proc_event struct */
66                 struct {
67                         __u32 err;
68                 } ack;
69
70                 struct fork_proc_event {
71                         __kernel_pid_t parent_pid;
72                         __kernel_pid_t parent_tgid;
73                         __kernel_pid_t child_pid;
74                         __kernel_pid_t child_tgid;
75                 } fork;
76
77                 struct exec_proc_event {
78                         __kernel_pid_t process_pid;
79                         __kernel_pid_t process_tgid;
80                 } exec;
81
82                 struct id_proc_event {
83                         __kernel_pid_t process_pid;
84                         __kernel_pid_t process_tgid;
85                         union {
86                                 __u32 ruid; /* task uid */
87                                 __u32 rgid; /* task gid */
88                         } r;
89                         union {
90                                 __u32 euid;
91                                 __u32 egid;
92                         } e;
93                 } id;
94
95                 struct sid_proc_event {
96                         __kernel_pid_t process_pid;
97                         __kernel_pid_t process_tgid;
98                 } sid;
99
100                 struct ptrace_proc_event {
101                         __kernel_pid_t process_pid;
102                         __kernel_pid_t process_tgid;
103                         __kernel_pid_t tracer_pid;
104                         __kernel_pid_t tracer_tgid;
105                 } ptrace;
106
107                 struct comm_proc_event {
108                         __kernel_pid_t process_pid;
109                         __kernel_pid_t process_tgid;
110                         char           comm[16];
111                 } comm;
112
113                 struct exit_proc_event {
114                         __kernel_pid_t process_pid;
115                         __kernel_pid_t process_tgid;
116                         __u32 exit_code, exit_signal;
117                 } exit;
118         } event_data;
119 };
120
121 #ifdef __KERNEL__
122 #ifdef CONFIG_PROC_EVENTS
123 void proc_fork_connector(struct task_struct *task);
124 void proc_exec_connector(struct task_struct *task);
125 void proc_id_connector(struct task_struct *task, int which_id);
126 void proc_sid_connector(struct task_struct *task);
127 void proc_ptrace_connector(struct task_struct *task, int which_id);
128 void proc_comm_connector(struct task_struct *task);
129 void proc_exit_connector(struct task_struct *task);
130 #else
131 static inline void proc_fork_connector(struct task_struct *task)
132 {}
133
134 static inline void proc_exec_connector(struct task_struct *task)
135 {}
136
137 static inline void proc_id_connector(struct task_struct *task,
138                                      int which_id)
139 {}
140
141 static inline void proc_sid_connector(struct task_struct *task)
142 {}
143
144 static inline void proc_comm_connector(struct task_struct *task)
145 {}
146
147 static inline void proc_ptrace_connector(struct task_struct *task,
148                                          int ptrace_id)
149 {}
150
151 static inline void proc_exit_connector(struct task_struct *task)
152 {}
153 #endif  /* CONFIG_PROC_EVENTS */
154 #endif  /* __KERNEL__ */
155 #endif  /* CN_PROC_H */