1 |
kumaneko |
111 |
/* |
2 |
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* fs/ccs_common.c |
3 |
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* |
4 |
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* Common functions for SAKURA and TOMOYO. |
5 |
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* |
6 |
kumaneko |
849 |
* Copyright (C) 2005-2008 NTT DATA CORPORATION |
7 |
kumaneko |
111 |
* |
8 |
kumaneko |
1052 |
* Version: 1.6.0-pre 2008/03/24 |
9 |
kumaneko |
111 |
* |
10 |
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* This file is applicable to both 2.4.30 and 2.6.11 and later. |
11 |
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* See README.ccs for ChangeLog. |
12 |
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* |
13 |
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*/ |
14 |
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15 |
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#include <linux/string.h> |
16 |
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#include <linux/mm.h> |
17 |
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#include <linux/utime.h> |
18 |
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#include <linux/file.h> |
19 |
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#include <linux/module.h> |
20 |
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#include <linux/slab.h> |
21 |
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#include <asm/uaccess.h> |
22 |
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#include <stdarg.h> |
23 |
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#include <linux/version.h> |
24 |
kumaneko |
1052 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
25 |
kumaneko |
111 |
#include <linux/namei.h> |
26 |
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#include <linux/mount.h> |
27 |
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static const int lookup_flags = LOOKUP_FOLLOW; |
28 |
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#else |
29 |
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static const int lookup_flags = LOOKUP_FOLLOW | LOOKUP_POSITIVE; |
30 |
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#endif |
31 |
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#include <linux/realpath.h> |
32 |
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#include <linux/ccs_common.h> |
33 |
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#include <linux/ccs_proc.h> |
34 |
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#include <linux/tomoyo.h> |
35 |
kumaneko |
1052 |
|
36 |
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/* To support PID namespace. */ |
37 |
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) |
38 |
kumaneko |
964 |
#define find_task_by_pid find_task_by_vpid |
39 |
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#endif |
40 |
kumaneko |
111 |
|
41 |
kumaneko |
1052 |
/* Set default specified by the kernel config. */ |
42 |
kumaneko |
120 |
#define MAX_ACCEPT_ENTRY (CONFIG_TOMOYO_MAX_ACCEPT_ENTRY) |
43 |
kumaneko |
1052 |
#define MAX_GRANT_LOG (CONFIG_TOMOYO_MAX_GRANT_LOG) |
44 |
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#define MAX_REJECT_LOG (CONFIG_TOMOYO_MAX_REJECT_LOG) |
45 |
kumaneko |
111 |
|
46 |
kumaneko |
1052 |
/* Has /sbin/init started? */ |
47 |
kumaneko |
1006 |
bool sbin_init_started = false; |
48 |
kumaneko |
111 |
|
49 |
kumaneko |
1052 |
/* Log level for SAKURA's printk(). */ |
50 |
kumaneko |
111 |
const char *ccs_log_level = KERN_DEBUG; |
51 |
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|
52 |
kumaneko |
1052 |
/* String table for functionality that takes 4 modes. */ |
53 |
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static const char *mode_4[4] = { |
54 |
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"disabled", "learning", "permissive", "enforcing" |
55 |
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}; |
56 |
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/* String table for functionality that takes 2 modes. */ |
57 |
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static const char *mode_2[4] = { |
58 |
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"disabled", "enabled", "enabled", "enabled" |
59 |
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}; |
60 |
kumaneko |
1014 |
|
61 |
kumaneko |
1052 |
/* Table for profile. */ |
62 |
kumaneko |
111 |
static struct { |
63 |
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const char *keyword; |
64 |
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unsigned int current_value; |
65 |
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const unsigned int max_value; |
66 |
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} ccs_control_array[CCS_MAX_CONTROL_INDEX] = { |
67 |
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[CCS_TOMOYO_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 }, |
68 |
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[CCS_TOMOYO_MAC_FOR_ARGV0] = { "MAC_FOR_ARGV0", 0, 3 }, |
69 |
kumaneko |
581 |
[CCS_TOMOYO_MAC_FOR_ENV] = { "MAC_FOR_ENV", 0, 3 }, |
70 |
kumaneko |
111 |
[CCS_TOMOYO_MAC_FOR_NETWORK] = { "MAC_FOR_NETWORK", 0, 3 }, |
71 |
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[CCS_TOMOYO_MAC_FOR_SIGNAL] = { "MAC_FOR_SIGNAL", 0, 3 }, |
72 |
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[CCS_SAKURA_DENY_CONCEAL_MOUNT] = { "DENY_CONCEAL_MOUNT", 0, 3 }, |
73 |
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[CCS_SAKURA_RESTRICT_CHROOT] = { "RESTRICT_CHROOT", 0, 3 }, |
74 |
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[CCS_SAKURA_RESTRICT_MOUNT] = { "RESTRICT_MOUNT", 0, 3 }, |
75 |
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[CCS_SAKURA_RESTRICT_UNMOUNT] = { "RESTRICT_UNMOUNT", 0, 3 }, |
76 |
kumaneko |
141 |
[CCS_SAKURA_RESTRICT_PIVOT_ROOT] = { "RESTRICT_PIVOT_ROOT", 0, 3 }, |
77 |
kumaneko |
111 |
[CCS_SAKURA_RESTRICT_AUTOBIND] = { "RESTRICT_AUTOBIND", 0, 1 }, |
78 |
kumaneko |
1052 |
[CCS_TOMOYO_MAX_ACCEPT_ENTRY] |
79 |
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= { "MAX_ACCEPT_ENTRY", MAX_ACCEPT_ENTRY, INT_MAX }, |
80 |
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[CCS_TOMOYO_MAX_GRANT_LOG] |
81 |
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= { "MAX_GRANT_LOG", MAX_GRANT_LOG, INT_MAX }, |
82 |
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[CCS_TOMOYO_MAX_REJECT_LOG] |
83 |
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= { "MAX_REJECT_LOG", MAX_REJECT_LOG, INT_MAX }, |
84 |
kumaneko |
111 |
[CCS_TOMOYO_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 }, |
85 |
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[CCS_ALLOW_ENFORCE_GRACE] = { "ALLOW_ENFORCE_GRACE", 0, 1 }, |
86 |
kumaneko |
1052 |
[CCS_SLEEP_PERIOD] |
87 |
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= { "SLEEP_PERIOD", 0, 3000 }, /* in 0.1 second */ |
88 |
kumaneko |
111 |
}; |
89 |
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|
90 |
kumaneko |
1015 |
#ifdef CONFIG_TOMOYO |
91 |
kumaneko |
1052 |
/* Capability name used by domain policy. */ |
92 |
kumaneko |
1015 |
const char *capability_control_keyword[TOMOYO_MAX_CAPABILITY_INDEX] = { |
93 |
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[TOMOYO_INET_STREAM_SOCKET_CREATE] = "inet_tcp_create", |
94 |
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[TOMOYO_INET_STREAM_SOCKET_LISTEN] = "inet_tcp_listen", |
95 |
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[TOMOYO_INET_STREAM_SOCKET_CONNECT] = "inet_tcp_connect", |
96 |
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[TOMOYO_USE_INET_DGRAM_SOCKET] = "use_inet_udp", |
97 |
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[TOMOYO_USE_INET_RAW_SOCKET] = "use_inet_ip", |
98 |
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[TOMOYO_USE_ROUTE_SOCKET] = "use_route", |
99 |
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[TOMOYO_USE_PACKET_SOCKET] = "use_packet", |
100 |
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[TOMOYO_SYS_MOUNT] = "SYS_MOUNT", |
101 |
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[TOMOYO_SYS_UMOUNT] = "SYS_UMOUNT", |
102 |
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[TOMOYO_SYS_REBOOT] = "SYS_REBOOT", |
103 |
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[TOMOYO_SYS_CHROOT] = "SYS_CHROOT", |
104 |
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[TOMOYO_SYS_KILL] = "SYS_KILL", |
105 |
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[TOMOYO_SYS_VHANGUP] = "SYS_VHANGUP", |
106 |
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[TOMOYO_SYS_SETTIME] = "SYS_TIME", |
107 |
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[TOMOYO_SYS_NICE] = "SYS_NICE", |
108 |
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[TOMOYO_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME", |
109 |
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[TOMOYO_USE_KERNEL_MODULE] = "use_kernel_module", |
110 |
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[TOMOYO_CREATE_FIFO] = "create_fifo", |
111 |
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[TOMOYO_CREATE_BLOCK_DEV] = "create_block_dev", |
112 |
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[TOMOYO_CREATE_CHAR_DEV] = "create_char_dev", |
113 |
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[TOMOYO_CREATE_UNIX_SOCKET] = "create_unix_socket", |
114 |
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[TOMOYO_SYS_LINK] = "SYS_LINK", |
115 |
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[TOMOYO_SYS_SYMLINK] = "SYS_SYMLINK", |
116 |
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[TOMOYO_SYS_RENAME] = "SYS_RENAME", |
117 |
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[TOMOYO_SYS_UNLINK] = "SYS_UNLINK", |
118 |
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[TOMOYO_SYS_CHMOD] = "SYS_CHMOD", |
119 |
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[TOMOYO_SYS_CHOWN] = "SYS_CHOWN", |
120 |
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[TOMOYO_SYS_IOCTL] = "SYS_IOCTL", |
121 |
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[TOMOYO_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD", |
122 |
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[TOMOYO_SYS_PIVOT_ROOT] = "SYS_PIVOT_ROOT", |
123 |
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[TOMOYO_SYS_PTRACE] = "SYS_PTRACE", |
124 |
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}; |
125 |
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#endif |
126 |
|
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|
127 |
kumaneko |
1052 |
/* Profile table. Memory is allocated as needed. */ |
128 |
|
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static struct profile { |
129 |
kumaneko |
111 |
unsigned int value[CCS_MAX_CONTROL_INDEX]; |
130 |
|
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const struct path_info *comment; |
131 |
kumaneko |
1015 |
#ifdef CONFIG_TOMOYO |
132 |
|
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unsigned char capability_value[TOMOYO_MAX_CAPABILITY_INDEX]; |
133 |
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#endif |
134 |
kumaneko |
1052 |
} *profile_ptr[MAX_PROFILES]; |
135 |
kumaneko |
111 |
|
136 |
kumaneko |
1052 |
/* Permit policy management by non-root user? */ |
137 |
kumaneko |
1006 |
static bool manage_by_non_root = false; |
138 |
kumaneko |
111 |
|
139 |
kumaneko |
1052 |
/* Utility functions. */ |
140 |
kumaneko |
111 |
|
141 |
|
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#ifdef CONFIG_TOMOYO |
142 |
kumaneko |
1052 |
/** |
143 |
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* tomoyo_quiet_setup - Set TOMOYO_VERBOSE=0 by default. |
144 |
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* |
145 |
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* @str: Unused. |
146 |
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* |
147 |
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* Returns 0. |
148 |
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*/ |
149 |
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static int __init tomoyo_quiet_setup(char *str) |
150 |
kumaneko |
111 |
{ |
151 |
|
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ccs_control_array[CCS_TOMOYO_VERBOSE].current_value = 0; |
152 |
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return 0; |
153 |
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} |
154 |
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|
155 |
kumaneko |
1052 |
__setup("TOMOYO_QUIET", tomoyo_quiet_setup); |
156 |
kumaneko |
111 |
#endif |
157 |
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|
158 |
kumaneko |
1052 |
/** |
159 |
|
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* is_byte_range - Check whether the string isa \ooo style octal value. |
160 |
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* |
161 |
|
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* @str: Pointer to the string. |
162 |
|
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* |
163 |
|
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* Returns true if @str is a \ooo style octal value, false otherwise. |
164 |
|
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*/ |
165 |
|
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static bool is_byte_range(const char *str) |
166 |
|
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{ |
167 |
|
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return *str >= '0' && *str++ <= '3' && |
168 |
|
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*str >= '0' && *str++ <= '7' && |
169 |
|
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*str >= '0' && *str <= '7'; |
170 |
|
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} |
171 |
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|
172 |
|
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/** |
173 |
|
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* is_decimal - Check whether the character is a decimal character. |
174 |
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* |
175 |
|
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* @c: The character to check. |
176 |
|
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* |
177 |
|
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* Returns true if @c is a decimal character, false otherwise. |
178 |
|
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*/ |
179 |
|
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static bool is_decimal(const char c) |
180 |
|
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{ |
181 |
|
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return (c >= '0' && c <= '9'); |
182 |
|
|
} |
183 |
|
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|
184 |
|
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/** |
185 |
|
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* is_hexadecimal - Check whether the character is a hexadecimal character. |
186 |
|
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* |
187 |
|
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* @c: The character to check. |
188 |
|
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* |
189 |
|
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* Returns true if @c is a hexadecimal character, false otherwise. |
190 |
|
|
*/ |
191 |
|
|
static bool is_hexadecimal(const char c) |
192 |
|
|
{ |
193 |
|
|
return ((c >= '0' && c <= '9') || |
194 |
|
|
(c >= 'A' && c <= 'F') || |
195 |
|
|
(c >= 'a' && c <= 'f')); |
196 |
|
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} |
197 |
|
|
|
198 |
|
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/** |
199 |
|
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* is_alphabet_char - Check whether the character is an alphabet. |
200 |
|
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* |
201 |
|
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* @c: The character to check. |
202 |
|
|
* |
203 |
|
|
* Returns true if @c is an alphabet character, false otherwise. |
204 |
|
|
*/ |
205 |
|
|
static bool is_alphabet_char(const char c) |
206 |
|
|
{ |
207 |
|
|
return ((c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f')); |
208 |
|
|
} |
209 |
|
|
|
210 |
|
|
/** |
211 |
|
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* str_starts - Check whether the given string starts with the given keyword. |
212 |
|
|
* |
213 |
|
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* @src: Pointer to pointer to the string. |
214 |
|
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* @find: Pointer to the keyword. |
215 |
|
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* |
216 |
|
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* Returns true if @src starts with @find, false otherwise. |
217 |
|
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* |
218 |
|
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* The @src is updated to point the first character after the @find |
219 |
|
|
* if @src starts with @find . |
220 |
|
|
*/ |
221 |
|
|
static bool str_starts(char **src, const char *find) |
222 |
|
|
{ |
223 |
|
|
const int len = strlen(find); |
224 |
|
|
char *tmp = *src; |
225 |
|
|
if (strncmp(tmp, find, len)) |
226 |
|
|
return false; |
227 |
|
|
tmp += len; |
228 |
|
|
*src = tmp; |
229 |
|
|
return true; |
230 |
|
|
} |
231 |
|
|
|
232 |
|
|
/** |
233 |
|
|
* normalize_line - Format string. |
234 |
|
|
* |
235 |
|
|
* @buffer: The line to normalize. |
236 |
|
|
* |
237 |
kumaneko |
111 |
* Leading and trailing whitespaces are removed. |
238 |
|
|
* Multiple whitespaces are packed into single space. |
239 |
kumaneko |
1052 |
* |
240 |
|
|
* Returns nothing. |
241 |
kumaneko |
111 |
*/ |
242 |
kumaneko |
1052 |
static void normalize_line(unsigned char *buffer) |
243 |
kumaneko |
111 |
{ |
244 |
|
|
unsigned char *sp = buffer, *dp = buffer; |
245 |
kumaneko |
1006 |
bool first = true; |
246 |
kumaneko |
1052 |
while (*sp && (*sp <= ' ' || *sp >= 127)) |
247 |
|
|
sp++; |
248 |
kumaneko |
111 |
while (*sp) { |
249 |
kumaneko |
1052 |
if (!first) |
250 |
|
|
*dp++ = ' '; |
251 |
kumaneko |
1006 |
first = false; |
252 |
kumaneko |
1052 |
while (*sp > ' ' && *sp < 127) |
253 |
|
|
*dp++ = *sp++; |
254 |
|
|
while (*sp && (*sp <= ' ' || *sp >= 127)) |
255 |
|
|
sp++; |
256 |
kumaneko |
111 |
} |
257 |
|
|
*dp = '\0'; |
258 |
|
|
} |
259 |
|
|
|
260 |
kumaneko |
1052 |
/** |
261 |
kumaneko |
1054 |
* ccs_is_correct_path - Validate a pathname. |
262 |
|
|
* @filename: The pathname to check. |
263 |
|
|
* @start_type: Should the pathname start with '/'? |
264 |
|
|
* 1 = must / -1 = must not / 0 = don't care |
265 |
|
|
* @pattern_type: Can the pathname contain a wildcard? |
266 |
|
|
* 1 = must / -1 = must not / 0 = don't care |
267 |
|
|
* @end_type: Should the pathname end with '/'? |
268 |
|
|
* 1 = must / -1 = must not / 0 = don't care |
269 |
|
|
* @function: The name of function calling me. |
270 |
kumaneko |
1052 |
* |
271 |
kumaneko |
1054 |
* Check whether the given filename follows the naming rules. |
272 |
kumaneko |
1052 |
* Returns true if @filename follows the naming rules, false otherwise. |
273 |
kumaneko |
111 |
*/ |
274 |
kumaneko |
1052 |
bool ccs_is_correct_path(const char *filename, const s8 start_type, |
275 |
|
|
const s8 pattern_type, const s8 end_type, |
276 |
|
|
const char *function) |
277 |
kumaneko |
111 |
{ |
278 |
kumaneko |
1006 |
bool contains_pattern = false; |
279 |
kumaneko |
1052 |
unsigned char c, d, e; |
280 |
kumaneko |
111 |
const char *original_filename = filename; |
281 |
kumaneko |
1052 |
if (!filename) |
282 |
|
|
goto out; |
283 |
kumaneko |
111 |
c = *filename; |
284 |
|
|
if (start_type == 1) { /* Must start with '/' */ |
285 |
kumaneko |
1052 |
if (c != '/') |
286 |
|
|
goto out; |
287 |
kumaneko |
111 |
} else if (start_type == -1) { /* Must not start with '/' */ |
288 |
kumaneko |
1052 |
if (c == '/') |
289 |
|
|
goto out; |
290 |
kumaneko |
111 |
} |
291 |
kumaneko |
1052 |
if (c) |
292 |
|
|
c = *(strchr(filename, '\0') - 1); |
293 |
kumaneko |
111 |
if (end_type == 1) { /* Must end with '/' */ |
294 |
kumaneko |
1052 |
if (c != '/') |
295 |
|
|
goto out; |
296 |
kumaneko |
111 |
} else if (end_type == -1) { /* Must not end with '/' */ |
297 |
kumaneko |
1052 |
if (c == '/') |
298 |
|
|
goto out; |
299 |
kumaneko |
111 |
} |
300 |
|
|
while ((c = *filename++) != '\0') { |
301 |
|
|
if (c == '\\') { |
302 |
|
|
switch ((c = *filename++)) { |
303 |
|
|
case '\\': /* "\\" */ |
304 |
|
|
continue; |
305 |
|
|
case '$': /* "\$" */ |
306 |
|
|
case '+': /* "\+" */ |
307 |
|
|
case '?': /* "\?" */ |
308 |
|
|
case '*': /* "\*" */ |
309 |
|
|
case '@': /* "\@" */ |
310 |
|
|
case 'x': /* "\x" */ |
311 |
|
|
case 'X': /* "\X" */ |
312 |
|
|
case 'a': /* "\a" */ |
313 |
|
|
case 'A': /* "\A" */ |
314 |
kumaneko |
206 |
case '-': /* "\-" */ |
315 |
kumaneko |
1052 |
if (pattern_type == -1) |
316 |
|
|
break; /* Must not contain pattern */ |
317 |
kumaneko |
1006 |
contains_pattern = true; |
318 |
kumaneko |
111 |
continue; |
319 |
|
|
case '0': /* "\ooo" */ |
320 |
|
|
case '1': |
321 |
|
|
case '2': |
322 |
|
|
case '3': |
323 |
kumaneko |
1052 |
d = *filename++; |
324 |
|
|
if (d < '0' || d > '7') |
325 |
|
|
break; |
326 |
|
|
e = *filename++; |
327 |
|
|
if (e < '0' || e > '7') |
328 |
|
|
break; |
329 |
|
|
c = (((u8) (c - '0')) << 6) |
330 |
|
|
+ (((u8) (d - '0')) << 3) |
331 |
|
|
+ (((u8) (e - '0'))); |
332 |
|
|
if (c && (c <= ' ' || c >= 127)) |
333 |
|
|
continue; /* pattern is not \000 */ |
334 |
kumaneko |
111 |
} |
335 |
|
|
goto out; |
336 |
|
|
} else if (c <= ' ' || c >= 127) { |
337 |
|
|
goto out; |
338 |
|
|
} |
339 |
|
|
} |
340 |
|
|
if (pattern_type == 1) { /* Must contain pattern */ |
341 |
kumaneko |
1052 |
if (!contains_pattern) |
342 |
|
|
goto out; |
343 |
kumaneko |
111 |
} |
344 |
kumaneko |
1006 |
return true; |
345 |
kumaneko |
111 |
out: |
346 |
kumaneko |
1052 |
printk(KERN_DEBUG "%s: Invalid pathname '%s'\n", function, |
347 |
|
|
original_filename); |
348 |
kumaneko |
1006 |
return false; |
349 |
kumaneko |
111 |
} |
350 |
|
|
|
351 |
kumaneko |
1052 |
/** |
352 |
kumaneko |
1054 |
* ccs_is_correct_domain - Check whether the given domainname follows the naming rules. |
353 |
|
|
* @domainname: The domainname to check. |
354 |
|
|
* @function: The name of function calling me. |
355 |
kumaneko |
1052 |
* |
356 |
|
|
* Returns true if @domainname follows the naming rules, false otherwise. |
357 |
kumaneko |
111 |
*/ |
358 |
kumaneko |
1052 |
bool ccs_is_correct_domain(const unsigned char *domainname, |
359 |
|
|
const char *function) |
360 |
kumaneko |
111 |
{ |
361 |
|
|
unsigned char c, d, e; |
362 |
|
|
const char *org_domainname = domainname; |
363 |
kumaneko |
1052 |
if (!domainname || strncmp(domainname, ROOT_NAME, ROOT_NAME_LEN)) |
364 |
|
|
goto out; |
365 |
kumaneko |
111 |
domainname += ROOT_NAME_LEN; |
366 |
kumaneko |
1052 |
if (!*domainname) |
367 |
|
|
return true; |
368 |
kumaneko |
111 |
do { |
369 |
kumaneko |
1052 |
if (*domainname++ != ' ') |
370 |
|
|
goto out; |
371 |
|
|
if (*domainname++ != '/') |
372 |
|
|
goto out; |
373 |
kumaneko |
111 |
while ((c = *domainname) != '\0' && c != ' ') { |
374 |
|
|
domainname++; |
375 |
|
|
if (c == '\\') { |
376 |
kumaneko |
1052 |
c = *domainname++; |
377 |
|
|
switch ((c)) { |
378 |
kumaneko |
111 |
case '\\': /* "\\" */ |
379 |
|
|
continue; |
380 |
|
|
case '0': /* "\ooo" */ |
381 |
|
|
case '1': |
382 |
|
|
case '2': |
383 |
|
|
case '3': |
384 |
kumaneko |
1052 |
d = *domainname++; |
385 |
|
|
if (d < '0' || d > '7') |
386 |
|
|
break; |
387 |
|
|
e = *domainname++; |
388 |
|
|
if (e < '0' || e > '7') |
389 |
|
|
break; |
390 |
|
|
c = (((u8) (c - '0')) << 6) |
391 |
|
|
+ (((u8) (d - '0')) << 3) |
392 |
|
|
+ (((u8) (e - '0'))); |
393 |
|
|
if (c && (c <= ' ' || c >= 127)) |
394 |
|
|
/* pattern is not \000 */ |
395 |
|
|
continue; |
396 |
kumaneko |
111 |
} |
397 |
|
|
goto out; |
398 |
|
|
} else if (c < ' ' || c >= 127) { |
399 |
|
|
goto out; |
400 |
|
|
} |
401 |
|
|
} |
402 |
|
|
} while (*domainname); |
403 |
kumaneko |
1006 |
return true; |
404 |
kumaneko |
111 |
out: |
405 |
kumaneko |
1052 |
printk(KERN_DEBUG "%s: Invalid domainname '%s'\n", function, |
406 |
|
|
org_domainname); |
407 |
kumaneko |
1006 |
return false; |
408 |
kumaneko |
111 |
} |
409 |
|
|
|
410 |
kumaneko |
1052 |
/** |
411 |
|
|
* ccs_is_domain_def - Check whether the given token can be a domainname. |
412 |
|
|
* |
413 |
|
|
* @buffer: The token to check. |
414 |
|
|
* |
415 |
|
|
* Returns true if @buffer possibly be a domainname, false otherwise. |
416 |
|
|
*/ |
417 |
|
|
bool ccs_is_domain_def(const unsigned char *buffer) |
418 |
kumaneko |
461 |
{ |
419 |
kumaneko |
1052 |
return !strncmp(buffer, ROOT_NAME, ROOT_NAME_LEN); |
420 |
kumaneko |
461 |
} |
421 |
|
|
|
422 |
kumaneko |
1052 |
/** |
423 |
|
|
* ccs_find_domain - Find a domain by the given name. |
424 |
|
|
* |
425 |
kumaneko |
1054 |
* @domainname: The domainname to find. |
426 |
kumaneko |
1052 |
* |
427 |
|
|
* Returns pointer to "struct domain_info" if found, NULL otherwise. |
428 |
|
|
*/ |
429 |
|
|
struct domain_info *ccs_find_domain(const char *domainname) |
430 |
kumaneko |
461 |
{ |
431 |
|
|
struct domain_info *domain; |
432 |
kumaneko |
1052 |
struct path_info name; |
433 |
|
|
name.name = domainname; |
434 |
|
|
ccs_fill_path_info(&name); |
435 |
kumaneko |
722 |
list1_for_each_entry(domain, &domain_list, list) { |
436 |
kumaneko |
1052 |
if (!domain->is_deleted && |
437 |
|
|
!ccs_pathcmp(&name, domain->domainname)) |
438 |
|
|
return domain; |
439 |
kumaneko |
461 |
} |
440 |
|
|
return NULL; |
441 |
|
|
} |
442 |
|
|
|
443 |
kumaneko |
1052 |
/** |
444 |
|
|
* path_depth - Evaluate the number of '/' in a string. |
445 |
|
|
* |
446 |
|
|
* @pathname: The string to evaluate. |
447 |
|
|
* |
448 |
|
|
* Returns path depth of the string. |
449 |
|
|
* |
450 |
|
|
* I score 2 for each of the '/' in the @pathname |
451 |
|
|
* and score 1 if the @pathname ends with '/'. |
452 |
|
|
*/ |
453 |
|
|
static int path_depth(const char *pathname) |
454 |
kumaneko |
111 |
{ |
455 |
|
|
int i = 0; |
456 |
|
|
if (pathname) { |
457 |
|
|
char *ep = strchr(pathname, '\0'); |
458 |
|
|
if (pathname < ep--) { |
459 |
kumaneko |
1052 |
if (*ep != '/') |
460 |
|
|
i++; |
461 |
|
|
while (pathname <= ep) |
462 |
|
|
if (*ep-- == '/') |
463 |
|
|
i += 2; |
464 |
kumaneko |
111 |
} |
465 |
|
|
} |
466 |
|
|
return i; |
467 |
|
|
} |
468 |
|
|
|
469 |
kumaneko |
1052 |
/** |
470 |
kumaneko |
1054 |
* const_part_length - Evaluate the initial length without a pattern in a token. |
471 |
kumaneko |
1052 |
* |
472 |
|
|
* @filename: The string to evaluate. |
473 |
|
|
* |
474 |
|
|
* Returns the initial length without a pattern in @filename . |
475 |
|
|
*/ |
476 |
kumaneko |
111 |
static int const_part_length(const char *filename) |
477 |
|
|
{ |
478 |
kumaneko |
1052 |
char c; |
479 |
kumaneko |
111 |
int len = 0; |
480 |
kumaneko |
1052 |
if (!filename) |
481 |
|
|
return 0; |
482 |
|
|
while ((c = *filename++) != '\0') { |
483 |
|
|
if (c != '\\') { |
484 |
|
|
len++; |
485 |
|
|
continue; |
486 |
kumaneko |
111 |
} |
487 |
kumaneko |
1052 |
c = *filename++; |
488 |
|
|
switch (c) { |
489 |
|
|
case '\\': /* "\\" */ |
490 |
|
|
len += 2; |
491 |
|
|
continue; |
492 |
|
|
case '0': /* "\ooo" */ |
493 |
|
|
case '1': |
494 |
|
|
case '2': |
495 |
|
|
case '3': |
496 |
|
|
c = *filename++; |
497 |
|
|
if (c < '0' || c > '7') |
498 |
|
|
break; |
499 |
|
|
c = *filename++; |
500 |
|
|
if (c < '0' || c > '7') |
501 |
|
|
break; |
502 |
|
|
len += 4; |
503 |
|
|
continue; |
504 |
|
|
} |
505 |
|
|
break; |
506 |
kumaneko |
111 |
} |
507 |
|
|
return len; |
508 |
|
|
} |
509 |
|
|
|
510 |
kumaneko |
1052 |
/** |
511 |
|
|
* ccs_fill_path_info - Fill in "struct path_info" members. |
512 |
|
|
* |
513 |
|
|
* @ptr: Pointer to "struct path_info" to fill in. |
514 |
|
|
* |
515 |
|
|
* The caller sets "struct path_info"->name. |
516 |
|
|
*/ |
517 |
|
|
void ccs_fill_path_info(struct path_info *ptr) |
518 |
kumaneko |
111 |
{ |
519 |
|
|
const char *name = ptr->name; |
520 |
|
|
const int len = strlen(name); |
521 |
|
|
ptr->total_len = len; |
522 |
|
|
ptr->const_len = const_part_length(name); |
523 |
|
|
ptr->is_dir = len && (name[len - 1] == '/'); |
524 |
|
|
ptr->is_patterned = (ptr->const_len < len); |
525 |
|
|
ptr->hash = full_name_hash(name, len); |
526 |
kumaneko |
1052 |
ptr->depth = path_depth(name); |
527 |
kumaneko |
111 |
} |
528 |
|
|
|
529 |
kumaneko |
1052 |
/** |
530 |
|
|
* file_matches_to_pattern2 - Pattern matching without '/' character |
531 |
|
|
* and "\-" pattern. |
532 |
|
|
* |
533 |
|
|
* @filename: The start of string to check. |
534 |
|
|
* @filename_end: The end of string to check. |
535 |
|
|
* @pattern: The start of pattern to compare. |
536 |
|
|
* @pattern_end: The end of pattern to compare. |
537 |
|
|
* |
538 |
|
|
* Returns true if @filename matches @pattern, false otherwise. |
539 |
|
|
*/ |
540 |
|
|
static bool file_matches_to_pattern2(const char *filename, |
541 |
|
|
const char *filename_end, |
542 |
|
|
const char *pattern, |
543 |
|
|
const char *pattern_end) |
544 |
kumaneko |
111 |
{ |
545 |
|
|
while (filename < filename_end && pattern < pattern_end) { |
546 |
kumaneko |
1052 |
char c; |
547 |
kumaneko |
111 |
if (*pattern != '\\') { |
548 |
kumaneko |
1052 |
if (*filename++ != *pattern++) |
549 |
|
|
return false; |
550 |
|
|
continue; |
551 |
|
|
} |
552 |
|
|
c = *filename; |
553 |
|
|
pattern++; |
554 |
|
|
switch (*pattern) { |
555 |
|
|
int i, j; |
556 |
|
|
case '?': |
557 |
|
|
if (c == '/') { |
558 |
|
|
return false; |
559 |
|
|
} else if (c == '\\') { |
560 |
|
|
if (filename[1] == '\\') |
561 |
|
|
filename++; |
562 |
|
|
else if (is_byte_range(filename + 1)) |
563 |
|
|
filename += 3; |
564 |
|
|
else |
565 |
kumaneko |
1006 |
return false; |
566 |
kumaneko |
1052 |
} |
567 |
|
|
break; |
568 |
|
|
case '\\': |
569 |
|
|
if (c != '\\') |
570 |
|
|
return false; |
571 |
|
|
if (*++filename != '\\') |
572 |
|
|
return false; |
573 |
|
|
break; |
574 |
|
|
case '+': |
575 |
|
|
if (!is_decimal(c)) |
576 |
|
|
return false; |
577 |
|
|
break; |
578 |
|
|
case 'x': |
579 |
|
|
if (!is_hexadecimal(c)) |
580 |
|
|
return false; |
581 |
|
|
break; |
582 |
|
|
case 'a': |
583 |
|
|
if (!is_alphabet_char(c)) |
584 |
|
|
return false; |
585 |
|
|
break; |
586 |
|
|
case '0': |
587 |
|
|
case '1': |
588 |
|
|
case '2': |
589 |
|
|
case '3': |
590 |
|
|
if (c == '\\' && is_byte_range(filename + 1) |
591 |
|
|
&& strncmp(filename + 1, pattern, 3) == 0) { |
592 |
|
|
filename += 3; |
593 |
|
|
pattern += 2; |
594 |
kumaneko |
111 |
break; |
595 |
kumaneko |
1052 |
} |
596 |
|
|
return false; /* Not matched. */ |
597 |
|
|
case '*': |
598 |
|
|
case '@': |
599 |
|
|
for (i = 0; i <= filename_end - filename; i++) { |
600 |
|
|
if (file_matches_to_pattern2(filename + i, |
601 |
|
|
filename_end, |
602 |
|
|
pattern + 1, |
603 |
|
|
pattern_end)) |
604 |
|
|
return true; |
605 |
|
|
c = filename[i]; |
606 |
|
|
if (c == '.' && *pattern == '@') |
607 |
kumaneko |
111 |
break; |
608 |
kumaneko |
1052 |
if (c != '\\') |
609 |
|
|
continue; |
610 |
|
|
if (filename[i + 1] == '\\') |
611 |
|
|
i++; |
612 |
|
|
else if (is_byte_range(filename + i + 1)) |
613 |
|
|
i += 3; |
614 |
|
|
else |
615 |
|
|
break; /* Bad pattern. */ |
616 |
kumaneko |
111 |
} |
617 |
kumaneko |
1052 |
return false; /* Not matched. */ |
618 |
|
|
default: |
619 |
|
|
j = 0; |
620 |
|
|
c = *pattern; |
621 |
|
|
if (c == '$') { |
622 |
|
|
while (is_decimal(filename[j])) |
623 |
|
|
j++; |
624 |
|
|
} else if (c == 'X') { |
625 |
|
|
while (is_hexadecimal(filename[j])) |
626 |
|
|
j++; |
627 |
|
|
} else if (c == 'A') { |
628 |
|
|
while (is_alphabet_char(filename[j])) |
629 |
|
|
j++; |
630 |
|
|
} |
631 |
|
|
for (i = 1; i <= j; i++) { |
632 |
|
|
if (file_matches_to_pattern2(filename + i, |
633 |
|
|
filename_end, |
634 |
|
|
pattern + 1, |
635 |
|
|
pattern_end)) |
636 |
|
|
return true; |
637 |
|
|
} |
638 |
|
|
return false; /* Not matched or bad pattern. */ |
639 |
kumaneko |
111 |
} |
640 |
kumaneko |
1052 |
filename++; |
641 |
|
|
pattern++; |
642 |
kumaneko |
111 |
} |
643 |
kumaneko |
1052 |
while (*pattern == '\\' && |
644 |
|
|
(*(pattern + 1) == '*' || *(pattern + 1) == '@')) |
645 |
|
|
pattern += 2; |
646 |
kumaneko |
111 |
return (filename == filename_end && pattern == pattern_end); |
647 |
|
|
} |
648 |
|
|
|
649 |
kumaneko |
1052 |
/** |
650 |
|
|
* file_matches_to_pattern - Pattern matching without without '/' character. |
651 |
|
|
* |
652 |
|
|
* @filename: The start of string to check. |
653 |
|
|
* @filename_end: The end of string to check. |
654 |
|
|
* @pattern: The start of pattern to compare. |
655 |
|
|
* @pattern_end: The end of pattern to compare. |
656 |
|
|
* |
657 |
|
|
* Returns true if @filename matches @pattern, false otherwise. |
658 |
|
|
*/ |
659 |
|
|
static bool file_matches_to_pattern(const char *filename, |
660 |
|
|
const char *filename_end, |
661 |
|
|
const char *pattern, |
662 |
|
|
const char *pattern_end) |
663 |
kumaneko |
206 |
{ |
664 |
|
|
const char *pattern_start = pattern; |
665 |
kumaneko |
1006 |
bool first = true; |
666 |
|
|
bool result; |
667 |
kumaneko |
206 |
while (pattern < pattern_end - 1) { |
668 |
kumaneko |
1052 |
/* Split at "\-" pattern. */ |
669 |
|
|
if (*pattern++ != '\\' || *pattern++ != '-') |
670 |
|
|
continue; |
671 |
|
|
result = file_matches_to_pattern2(filename, filename_end, |
672 |
|
|
pattern_start, pattern - 2); |
673 |
|
|
if (first) |
674 |
|
|
result = !result; |
675 |
|
|
if (result) |
676 |
|
|
return false; |
677 |
kumaneko |
1006 |
first = false; |
678 |
kumaneko |
206 |
pattern_start = pattern; |
679 |
|
|
} |
680 |
kumaneko |
1052 |
result = file_matches_to_pattern2(filename, filename_end, |
681 |
|
|
pattern_start, pattern_end); |
682 |
kumaneko |
206 |
return first ? result : !result; |
683 |
|
|
} |
684 |
|
|
|
685 |
kumaneko |
1052 |
/** |
686 |
kumaneko |
1054 |
* ccs_path_matches_pattern - Check whether the given filename matches the given pattern. |
687 |
kumaneko |
1052 |
* @filename: The filename to check. |
688 |
|
|
* @pattern: The pattern to compare. |
689 |
kumaneko |
111 |
* |
690 |
kumaneko |
1052 |
* Returns true if matches, false otherwise. |
691 |
|
|
* |
692 |
|
|
* The following patterns are available. |
693 |
|
|
* \\ \ itself. |
694 |
|
|
* \ooo Octal representation of a byte. |
695 |
|
|
* \* More than or equals to 0 character other than '/'. |
696 |
|
|
* \@ More than or equals to 0 character other than '/' or '.'. |
697 |
|
|
* \? 1 byte character other than '/'. |
698 |
|
|
* \$ More than or equals to 1 decimal digit. |
699 |
|
|
* \+ 1 decimal digit. |
700 |
|
|
* \X More than or equals to 1 hexadecimal digit. |
701 |
|
|
* \x 1 hexadecimal digit. |
702 |
|
|
* \A More than or equals to 1 alphabet character. |
703 |
|
|
* \a 1 alphabet character. |
704 |
|
|
* \- Subtraction operator. |
705 |
kumaneko |
111 |
*/ |
706 |
kumaneko |
1052 |
bool ccs_path_matches_pattern(const struct path_info *filename, |
707 |
|
|
const struct path_info *pattern) |
708 |
kumaneko |
111 |
{ |
709 |
kumaneko |
1052 |
/* |
710 |
|
|
if (!filename || !pattern) |
711 |
|
|
return false; |
712 |
|
|
*/ |
713 |
|
|
const char *f = filename->name; |
714 |
|
|
const char *p = pattern->name; |
715 |
|
|
const int len = pattern->const_len; |
716 |
|
|
/* If @pattern doesn't contain pattern, I can use strcmp(). */ |
717 |
|
|
if (!pattern->is_patterned) |
718 |
|
|
return !ccs_pathcmp(filename, pattern); |
719 |
|
|
/* Dont compare if the number of '/' differs. */ |
720 |
|
|
if (filename->depth != pattern->depth) |
721 |
|
|
return false; |
722 |
|
|
/* Compare the initial length without patterns. */ |
723 |
|
|
if (strncmp(f, p, len)) |
724 |
|
|
return false; |
725 |
|
|
f += len; |
726 |
|
|
p += len; |
727 |
|
|
/* Main loop. Compare each directory component. */ |
728 |
|
|
while (*f && *p) { |
729 |
|
|
const char *f_delimiter = strchr(f, '/'); |
730 |
|
|
const char *p_delimiter = strchr(p, '/'); |
731 |
|
|
if (!f_delimiter) |
732 |
|
|
f_delimiter = strchr(f, '\0'); |
733 |
|
|
if (!p_delimiter) |
734 |
|
|
p_delimiter = strchr(p, '\0'); |
735 |
|
|
if (!file_matches_to_pattern(f, f_delimiter, p, p_delimiter)) |
736 |
|
|
return false; |
737 |
|
|
f = f_delimiter; |
738 |
|
|
if (*f) |
739 |
|
|
f++; |
740 |
|
|
p = p_delimiter; |
741 |
|
|
if (*p) |
742 |
|
|
p++; |
743 |
kumaneko |
111 |
} |
744 |
kumaneko |
1052 |
/* Ignore trailing "\*" and "\@" in @pattern. */ |
745 |
|
|
while (*p == '\\' && |
746 |
|
|
(*(p + 1) == '*' || *(p + 1) == '@')) |
747 |
|
|
p += 2; |
748 |
|
|
return (!*f && !*p); |
749 |
kumaneko |
111 |
} |
750 |
|
|
|
751 |
kumaneko |
1052 |
/** |
752 |
|
|
* ccs_io_printf - Transactional printf() to "struct ccs_io_buffer" structure. |
753 |
|
|
* |
754 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
755 |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
756 |
|
|
* |
757 |
|
|
* Returns true on success, false otherwise. |
758 |
|
|
* |
759 |
|
|
* The snprintf() will truncate, but ccs_io_printf() won't. |
760 |
kumaneko |
111 |
*/ |
761 |
kumaneko |
1052 |
bool ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
762 |
kumaneko |
111 |
{ |
763 |
|
|
va_list args; |
764 |
|
|
int len, pos = head->read_avail, size = head->readbuf_size - pos; |
765 |
kumaneko |
1052 |
if (size <= 0) |
766 |
|
|
return false; |
767 |
kumaneko |
111 |
va_start(args, fmt); |
768 |
|
|
len = vsnprintf(head->read_buf + pos, size, fmt, args); |
769 |
|
|
va_end(args); |
770 |
kumaneko |
1052 |
if (pos + len >= head->readbuf_size) |
771 |
|
|
return false; |
772 |
kumaneko |
111 |
head->read_avail += len; |
773 |
kumaneko |
1052 |
return true; |
774 |
kumaneko |
111 |
} |
775 |
|
|
|
776 |
kumaneko |
1052 |
/** |
777 |
|
|
* ccs_get_exe - Get ccs_realpath() of current process. |
778 |
|
|
* |
779 |
|
|
* Returns the ccs_realpath() of current process on success, NULL otherwise. |
780 |
|
|
* |
781 |
|
|
* This function uses ccs_alloc(), so the caller must ccs_free() |
782 |
|
|
* if this function didn't return NULL. |
783 |
kumaneko |
111 |
*/ |
784 |
kumaneko |
1052 |
const char *ccs_get_exe(void) |
785 |
kumaneko |
111 |
{ |
786 |
kumaneko |
737 |
struct mm_struct *mm = current->mm; |
787 |
|
|
struct vm_area_struct *vma; |
788 |
|
|
const char *cp = NULL; |
789 |
kumaneko |
1052 |
if (!mm) |
790 |
|
|
return NULL; |
791 |
kumaneko |
737 |
down_read(&mm->mmap_sem); |
792 |
|
|
for (vma = mm->mmap; vma; vma = vma->vm_next) { |
793 |
|
|
if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { |
794 |
kumaneko |
1052 |
cp = ccs_realpath_from_dentry(vma->vm_file->f_dentry, |
795 |
|
|
vma->vm_file->f_vfsmnt); |
796 |
kumaneko |
737 |
break; |
797 |
kumaneko |
111 |
} |
798 |
|
|
} |
799 |
kumaneko |
737 |
up_read(&mm->mmap_sem); |
800 |
|
|
return cp; |
801 |
kumaneko |
111 |
} |
802 |
|
|
|
803 |
kumaneko |
1052 |
/** |
804 |
|
|
* ccs_get_msg - Get warning message. |
805 |
|
|
* |
806 |
|
|
* @is_enforce: Is it enforcing mode? |
807 |
|
|
* |
808 |
|
|
* Returns "ERROR" or "WARNING". |
809 |
|
|
*/ |
810 |
|
|
const char *ccs_get_msg(const bool is_enforce) |
811 |
kumaneko |
111 |
{ |
812 |
kumaneko |
1052 |
if (is_enforce) |
813 |
|
|
return "ERROR"; |
814 |
|
|
else |
815 |
|
|
return "WARNING"; |
816 |
kumaneko |
111 |
} |
817 |
|
|
|
818 |
kumaneko |
1052 |
/** |
819 |
|
|
* ccs_check_flags_no_sleep_check - Check mode for specified functionality. |
820 |
|
|
* |
821 |
|
|
* @index: The functionality to check mode. |
822 |
|
|
* |
823 |
|
|
* Returns the mode of specified functionality. |
824 |
|
|
*/ |
825 |
|
|
unsigned int ccs_check_flags_no_sleep_check(const u8 index) |
826 |
kumaneko |
111 |
{ |
827 |
|
|
const u8 profile = current->domain_info->profile; |
828 |
kumaneko |
121 |
return sbin_init_started && index < CCS_MAX_CONTROL_INDEX |
829 |
|
|
#if MAX_PROFILES != 256 |
830 |
|
|
&& profile < MAX_PROFILES |
831 |
|
|
#endif |
832 |
kumaneko |
1052 |
&& profile_ptr[profile] ? |
833 |
|
|
profile_ptr[profile]->value[index] : 0; |
834 |
kumaneko |
111 |
} |
835 |
|
|
|
836 |
kumaneko |
1052 |
/** |
837 |
|
|
* sleep_check - Check whether it is permitted to do operations that may sleep. |
838 |
|
|
* |
839 |
|
|
* Returns true if it is permitted to do operations that may sleep, |
840 |
|
|
* false otherwise. |
841 |
|
|
* |
842 |
|
|
* TOMOYO Linux supports interactive enforcement that lets processes |
843 |
|
|
* wait for the administrator's decision. |
844 |
|
|
* All hooks but the one for ccs_may_autobind() are inserted where |
845 |
|
|
* it is permitted to do operations that may sleep. |
846 |
|
|
* Thus, this warning should not happen. |
847 |
|
|
*/ |
848 |
kumaneko |
1015 |
static bool sleep_check(void) |
849 |
kumaneko |
899 |
{ |
850 |
kumaneko |
1052 |
static u8 count = 20; |
851 |
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0) |
852 |
|
|
if (likely(!in_interrupt())) |
853 |
|
|
return true; |
854 |
kumaneko |
899 |
#else |
855 |
kumaneko |
1052 |
if (likely(!in_atomic())) |
856 |
|
|
return true; |
857 |
kumaneko |
899 |
#endif |
858 |
kumaneko |
1052 |
if (count) { |
859 |
|
|
count--; |
860 |
|
|
printk(KERN_ERR "BUG: sleeping function called " |
861 |
|
|
"from invalid context.\n"); |
862 |
|
|
dump_stack(); |
863 |
kumaneko |
899 |
} |
864 |
kumaneko |
1052 |
return false; |
865 |
kumaneko |
899 |
} |
866 |
|
|
|
867 |
kumaneko |
1052 |
/** |
868 |
|
|
* ccs_check_flags - Check mode for specified functionality. |
869 |
|
|
* |
870 |
|
|
* @index: The functionality to check mode. |
871 |
|
|
* |
872 |
|
|
* Returns the mode of specified functionality. |
873 |
|
|
*/ |
874 |
|
|
unsigned int ccs_check_flags(const u8 index) |
875 |
kumaneko |
1015 |
{ |
876 |
kumaneko |
1052 |
return sleep_check() ? ccs_check_flags_no_sleep_check(index) : 0; |
877 |
kumaneko |
1015 |
} |
878 |
|
|
|
879 |
|
|
#ifdef CONFIG_TOMOYO |
880 |
kumaneko |
1052 |
/** |
881 |
|
|
* ccs_check_capability_flags - Check mode for specified capability. |
882 |
|
|
* |
883 |
|
|
* @index: The capability to check mode. |
884 |
|
|
* |
885 |
|
|
* Returns the mode of specified capability. |
886 |
|
|
*/ |
887 |
|
|
u8 ccs_check_capability_flags(const u8 index) |
888 |
kumaneko |
1015 |
{ |
889 |
|
|
const u8 profile = current->domain_info->profile; |
890 |
|
|
return sbin_init_started && index < TOMOYO_MAX_CAPABILITY_INDEX |
891 |
|
|
#if MAX_PROFILES != 256 |
892 |
|
|
&& profile < MAX_PROFILES |
893 |
|
|
#endif |
894 |
|
|
&& sleep_check() |
895 |
kumaneko |
1052 |
&& profile_ptr[profile] ? |
896 |
|
|
profile_ptr[profile]->capability_value[index] : 0; |
897 |
kumaneko |
1015 |
} |
898 |
|
|
|
899 |
kumaneko |
1052 |
/** |
900 |
|
|
* ccs_cap2keyword - Convert capability operation to capability name. |
901 |
|
|
* |
902 |
|
|
* @operation: The capability index. |
903 |
|
|
* |
904 |
|
|
* Returns the name of the specified capability's name. |
905 |
|
|
*/ |
906 |
|
|
const char *ccs_cap2keyword(const u8 operation) |
907 |
kumaneko |
1015 |
{ |
908 |
kumaneko |
1052 |
return operation < TOMOYO_MAX_CAPABILITY_INDEX |
909 |
|
|
? capability_control_keyword[operation] : NULL; |
910 |
kumaneko |
1015 |
} |
911 |
|
|
|
912 |
|
|
#endif |
913 |
|
|
|
914 |
kumaneko |
1052 |
/** |
915 |
|
|
* ccs_verbose_mode - Check whether TOMOYO is verbose mode. |
916 |
|
|
* |
917 |
|
|
* Returns true if domain policy violation warning should be printed to |
918 |
|
|
* console. |
919 |
|
|
*/ |
920 |
|
|
bool ccs_verbose_mode(void) |
921 |
kumaneko |
111 |
{ |
922 |
kumaneko |
1052 |
return ccs_check_flags(CCS_TOMOYO_VERBOSE) != 0; |
923 |
kumaneko |
111 |
} |
924 |
|
|
|
925 |
kumaneko |
1052 |
/** |
926 |
|
|
* ccs_check_domain_quota - Check for domain's quota. |
927 |
|
|
* |
928 |
|
|
* @domain: Pointer to "struct domain_info". |
929 |
|
|
* |
930 |
|
|
* Returns true if the domain is not exceeded quota, false otherwise. |
931 |
|
|
*/ |
932 |
|
|
bool ccs_check_domain_quota(struct domain_info * const domain) |
933 |
kumaneko |
512 |
{ |
934 |
|
|
unsigned int count = 0; |
935 |
|
|
struct acl_info *ptr; |
936 |
kumaneko |
1052 |
if (!domain) |
937 |
|
|
return true; |
938 |
kumaneko |
722 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
939 |
kumaneko |
1052 |
if (!(ptr->type & ACL_DELETED)) |
940 |
|
|
count++; |
941 |
kumaneko |
512 |
} |
942 |
kumaneko |
1052 |
if (count < ccs_check_flags(CCS_TOMOYO_MAX_ACCEPT_ENTRY)) |
943 |
|
|
return true; |
944 |
kumaneko |
512 |
if (!domain->quota_warned) { |
945 |
kumaneko |
1006 |
domain->quota_warned = true; |
946 |
kumaneko |
1052 |
printk(KERN_WARNING "TOMOYO-WARNING: " |
947 |
|
|
"Domain '%s' has so many ACLs to hold. " |
948 |
|
|
"Stopped learning mode.\n", domain->domainname->name); |
949 |
kumaneko |
512 |
} |
950 |
kumaneko |
1006 |
return false; |
951 |
kumaneko |
512 |
} |
952 |
|
|
|
953 |
kumaneko |
1052 |
/** |
954 |
|
|
* ccs_find_or_assign_new_profile - Create a new profile. |
955 |
|
|
* |
956 |
|
|
* @profile: Profile number to create. |
957 |
|
|
* |
958 |
|
|
* Returns pointer to "struct profile" on success, NULL otherwise. |
959 |
|
|
*/ |
960 |
|
|
static struct profile *ccs_find_or_assign_new_profile(const unsigned int |
961 |
|
|
profile) |
962 |
kumaneko |
111 |
{ |
963 |
kumaneko |
652 |
static DEFINE_MUTEX(profile_lock); |
964 |
kumaneko |
214 |
struct profile *ptr = NULL; |
965 |
kumaneko |
652 |
mutex_lock(&profile_lock); |
966 |
kumaneko |
1052 |
if (profile < MAX_PROFILES) { |
967 |
|
|
ptr = profile_ptr[profile]; |
968 |
|
|
if (ptr) |
969 |
|
|
goto ok; |
970 |
|
|
ptr = ccs_alloc_element(sizeof(*ptr)); |
971 |
|
|
if (ptr) { |
972 |
kumaneko |
111 |
int i; |
973 |
kumaneko |
1052 |
for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) |
974 |
|
|
ptr->value[i] |
975 |
|
|
= ccs_control_array[i].current_value; |
976 |
|
|
/* |
977 |
|
|
* Needn't to initialize "ptr->capability_value" |
978 |
|
|
* because they are always 0. |
979 |
|
|
*/ |
980 |
kumaneko |
708 |
mb(); /* Avoid out-of-order execution. */ |
981 |
kumaneko |
111 |
profile_ptr[profile] = ptr; |
982 |
|
|
} |
983 |
|
|
} |
984 |
kumaneko |
1052 |
ok: |
985 |
kumaneko |
652 |
mutex_unlock(&profile_lock); |
986 |
kumaneko |
111 |
return ptr; |
987 |
|
|
} |
988 |
|
|
|
989 |
kumaneko |
1052 |
/** |
990 |
|
|
* write_profile - Write profile table. |
991 |
|
|
* |
992 |
|
|
* @head: Pointer to "struct ccs_io_buffer" |
993 |
|
|
* |
994 |
|
|
* Returns 0 on success, negative value otherwise. |
995 |
|
|
*/ |
996 |
|
|
static int write_profile(struct ccs_io_buffer *head) |
997 |
kumaneko |
111 |
{ |
998 |
|
|
char *data = head->write_buf; |
999 |
|
|
unsigned int i, value; |
1000 |
|
|
char *cp; |
1001 |
kumaneko |
214 |
struct profile *profile; |
1002 |
kumaneko |
111 |
i = simple_strtoul(data, &cp, 10); |
1003 |
|
|
if (data != cp) { |
1004 |
kumaneko |
1052 |
if (*cp != '-') |
1005 |
|
|
return -EINVAL; |
1006 |
|
|
data = cp + 1; |
1007 |
kumaneko |
111 |
} |
1008 |
kumaneko |
1052 |
profile = ccs_find_or_assign_new_profile(i); |
1009 |
|
|
if (!profile) |
1010 |
|
|
return -EINVAL; |
1011 |
kumaneko |
111 |
cp = strchr(data, '='); |
1012 |
kumaneko |
1052 |
if (!cp) |
1013 |
|
|
return -EINVAL; |
1014 |
kumaneko |
111 |
*cp = '\0'; |
1015 |
kumaneko |
1052 |
ccs_update_counter(CCS_UPDATES_COUNTER_PROFILE); |
1016 |
|
|
if (!strcmp(data, "COMMENT")) { |
1017 |
|
|
profile->comment = ccs_save_name(cp + 1); |
1018 |
kumaneko |
111 |
return 0; |
1019 |
|
|
} |
1020 |
kumaneko |
708 |
#ifdef CONFIG_TOMOYO |
1021 |
kumaneko |
1052 |
if (str_starts(&data, KEYWORD_MAC_FOR_CAPABILITY)) { |
1022 |
kumaneko |
1014 |
if (sscanf(cp + 1, "%u", &value) != 1) { |
1023 |
kumaneko |
1015 |
for (i = 0; i < 4; i++) { |
1024 |
kumaneko |
1052 |
if (strcmp(cp + 1, mode_4[i])) |
1025 |
|
|
continue; |
1026 |
kumaneko |
1015 |
value = i; |
1027 |
kumaneko |
1014 |
break; |
1028 |
|
|
} |
1029 |
kumaneko |
1052 |
if (i == 4) |
1030 |
|
|
return -EINVAL; |
1031 |
kumaneko |
1014 |
} |
1032 |
kumaneko |
1052 |
if (value > 3) |
1033 |
|
|
value = 3; |
1034 |
kumaneko |
1015 |
for (i = 0; i < TOMOYO_MAX_CAPABILITY_INDEX; i++) { |
1035 |
kumaneko |
1052 |
if (strcmp(data, capability_control_keyword[i])) |
1036 |
|
|
continue; |
1037 |
kumaneko |
1015 |
profile->capability_value[i] = value; |
1038 |
|
|
return 0; |
1039 |
|
|
} |
1040 |
|
|
return -EINVAL; |
1041 |
kumaneko |
111 |
} |
1042 |
kumaneko |
461 |
#endif |
1043 |
kumaneko |
111 |
for (i = 0; i < CCS_MAX_CONTROL_INDEX; i++) { |
1044 |
kumaneko |
1052 |
if (strcmp(data, ccs_control_array[i].keyword)) |
1045 |
|
|
continue; |
1046 |
kumaneko |
1014 |
if (sscanf(cp + 1, "%u", &value) != 1) { |
1047 |
|
|
int j; |
1048 |
|
|
const char **modes; |
1049 |
|
|
switch (i) { |
1050 |
|
|
case CCS_SAKURA_RESTRICT_AUTOBIND: |
1051 |
|
|
case CCS_TOMOYO_VERBOSE: |
1052 |
|
|
case CCS_ALLOW_ENFORCE_GRACE: |
1053 |
|
|
modes = mode_2; |
1054 |
|
|
break; |
1055 |
|
|
default: |
1056 |
|
|
modes = mode_4; |
1057 |
|
|
break; |
1058 |
|
|
} |
1059 |
|
|
for (j = 0; j < 4; j++) { |
1060 |
kumaneko |
1052 |
if (strcmp(cp + 1, modes[j])) |
1061 |
|
|
continue; |
1062 |
kumaneko |
1014 |
value = j; |
1063 |
|
|
break; |
1064 |
|
|
} |
1065 |
kumaneko |
1052 |
if (j == 4) |
1066 |
|
|
return -EINVAL; |
1067 |
kumaneko |
1014 |
} else if (value > ccs_control_array[i].max_value) { |
1068 |
|
|
value = ccs_control_array[i].max_value; |
1069 |
|
|
} |
1070 |
|
|
switch (i) { |
1071 |
|
|
case CCS_SAKURA_DENY_CONCEAL_MOUNT: |
1072 |
|
|
case CCS_SAKURA_RESTRICT_UNMOUNT: |
1073 |
kumaneko |
1052 |
if (value == 1) |
1074 |
|
|
value = 2; /* learning mode is not supported. */ |
1075 |
kumaneko |
1014 |
} |
1076 |
kumaneko |
111 |
profile->value[i] = value; |
1077 |
|
|
return 0; |
1078 |
|
|
} |
1079 |
|
|
return -EINVAL; |
1080 |
|
|
} |
1081 |
|
|
|
1082 |
kumaneko |
1052 |
/** |
1083 |
|
|
* read_profile - Read profile table. |
1084 |
|
|
* |
1085 |
|
|
* @head: Pointer to "struct ccs_io_buffer" |
1086 |
|
|
* |
1087 |
|
|
* Returns 0. |
1088 |
|
|
*/ |
1089 |
|
|
static int read_profile(struct ccs_io_buffer *head) |
1090 |
kumaneko |
111 |
{ |
1091 |
kumaneko |
1052 |
static const int total |
1092 |
|
|
= CCS_MAX_CONTROL_INDEX + TOMOYO_MAX_CAPABILITY_INDEX + 1; |
1093 |
kumaneko |
1006 |
int step; |
1094 |
kumaneko |
1052 |
if (head->read_eof) |
1095 |
|
|
return 0; |
1096 |
|
|
for (step = head->read_step; step < MAX_PROFILES * total; step++) { |
1097 |
|
|
const u8 index = step / total; |
1098 |
|
|
u8 type = step % total; |
1099 |
|
|
const struct profile *profile = profile_ptr[index]; |
1100 |
kumaneko |
1006 |
head->read_step = step; |
1101 |
kumaneko |
1052 |
if (!profile) |
1102 |
|
|
continue; |
1103 |
|
|
#if !defined(CONFIG_SAKURA) || !defined(CONFIG_TOMOYO) |
1104 |
|
|
switch (type) { |
1105 |
kumaneko |
461 |
#ifndef CONFIG_SAKURA |
1106 |
kumaneko |
1006 |
case CCS_SAKURA_DENY_CONCEAL_MOUNT: |
1107 |
|
|
case CCS_SAKURA_RESTRICT_CHROOT: |
1108 |
|
|
case CCS_SAKURA_RESTRICT_MOUNT: |
1109 |
|
|
case CCS_SAKURA_RESTRICT_UNMOUNT: |
1110 |
|
|
case CCS_SAKURA_RESTRICT_PIVOT_ROOT: |
1111 |
|
|
case CCS_SAKURA_RESTRICT_AUTOBIND: |
1112 |
kumaneko |
461 |
#endif |
1113 |
kumaneko |
111 |
#ifndef CONFIG_TOMOYO |
1114 |
kumaneko |
1006 |
case CCS_TOMOYO_MAC_FOR_FILE: |
1115 |
|
|
case CCS_TOMOYO_MAC_FOR_ARGV0: |
1116 |
|
|
case CCS_TOMOYO_MAC_FOR_ENV: |
1117 |
|
|
case CCS_TOMOYO_MAC_FOR_NETWORK: |
1118 |
|
|
case CCS_TOMOYO_MAC_FOR_SIGNAL: |
1119 |
|
|
case CCS_TOMOYO_MAX_ACCEPT_ENTRY: |
1120 |
|
|
case CCS_TOMOYO_MAX_GRANT_LOG: |
1121 |
|
|
case CCS_TOMOYO_MAX_REJECT_LOG: |
1122 |
|
|
case CCS_TOMOYO_VERBOSE: |
1123 |
kumaneko |
111 |
#endif |
1124 |
kumaneko |
1006 |
continue; |
1125 |
kumaneko |
111 |
} |
1126 |
kumaneko |
1052 |
#endif |
1127 |
|
|
if (!type) { /* Print profile' comment tag. */ |
1128 |
|
|
if (!ccs_io_printf(head, "%u-COMMENT=%s\n", |
1129 |
|
|
index, profile->comment ? |
1130 |
|
|
profile->comment->name : "")) |
1131 |
|
|
break; |
1132 |
|
|
continue; |
1133 |
|
|
} |
1134 |
|
|
type--; |
1135 |
|
|
if (type >= CCS_MAX_CONTROL_INDEX) { |
1136 |
kumaneko |
1015 |
#ifdef CONFIG_TOMOYO |
1137 |
kumaneko |
1052 |
const int i = type - CCS_MAX_CONTROL_INDEX; |
1138 |
|
|
const u8 value = profile->capability_value[i]; |
1139 |
|
|
if (!ccs_io_printf(head, |
1140 |
|
|
"%u-" KEYWORD_MAC_FOR_CAPABILITY |
1141 |
|
|
"%s=%s\n", index, |
1142 |
|
|
capability_control_keyword[i], |
1143 |
|
|
mode_4[value])) |
1144 |
|
|
break; |
1145 |
kumaneko |
1015 |
#endif |
1146 |
kumaneko |
1006 |
} else { |
1147 |
kumaneko |
1052 |
const unsigned int value = profile->value[type]; |
1148 |
kumaneko |
1014 |
const char **modes = NULL; |
1149 |
kumaneko |
1052 |
const char *keyword = ccs_control_array[type].keyword; |
1150 |
|
|
switch (ccs_control_array[type].max_value) { |
1151 |
kumaneko |
1014 |
case 3: |
1152 |
|
|
modes = mode_4; |
1153 |
|
|
break; |
1154 |
|
|
case 1: |
1155 |
|
|
modes = mode_2; |
1156 |
|
|
break; |
1157 |
|
|
} |
1158 |
|
|
if (modes) { |
1159 |
kumaneko |
1052 |
if (!ccs_io_printf(head, "%u-%s=%s\n", index, |
1160 |
|
|
keyword, modes[value])) |
1161 |
|
|
break; |
1162 |
kumaneko |
1014 |
} else { |
1163 |
kumaneko |
1052 |
if (!ccs_io_printf(head, "%u-%s=%u\n", index, |
1164 |
|
|
keyword, value)) |
1165 |
|
|
break; |
1166 |
kumaneko |
1014 |
} |
1167 |
kumaneko |
1006 |
} |
1168 |
|
|
} |
1169 |
kumaneko |
1052 |
if (step == MAX_PROFILES * total) |
1170 |
|
|
head->read_eof = true; |
1171 |
kumaneko |
111 |
return 0; |
1172 |
|
|
} |
1173 |
|
|
|
1174 |
kumaneko |
1052 |
/* Structure for policy manager. */ |
1175 |
kumaneko |
214 |
struct policy_manager_entry { |
1176 |
kumaneko |
722 |
struct list1_head list; |
1177 |
kumaneko |
1052 |
/* A path to program or a domainname. */ |
1178 |
kumaneko |
111 |
const struct path_info *manager; |
1179 |
kumaneko |
1052 |
bool is_domain; /* True if manager is a domainname. */ |
1180 |
|
|
bool is_deleted; /* True if this entry is deleted. */ |
1181 |
kumaneko |
214 |
}; |
1182 |
kumaneko |
111 |
|
1183 |
kumaneko |
1052 |
/* The list for "struct policy_manager_entry". */ |
1184 |
kumaneko |
722 |
static LIST1_HEAD(policy_manager_list); |
1185 |
kumaneko |
111 |
|
1186 |
kumaneko |
1052 |
/** |
1187 |
|
|
* update_manager_entry - Add a manager entry. |
1188 |
|
|
* |
1189 |
|
|
* @manager: The path to manager or the domainnamme. |
1190 |
|
|
* @is_delete: True if it is a delete request. |
1191 |
|
|
* |
1192 |
|
|
* Returns 0 on success, negative value otherwise. |
1193 |
|
|
*/ |
1194 |
|
|
static int update_manager_entry(const char *manager, const bool is_delete) |
1195 |
kumaneko |
111 |
{ |
1196 |
kumaneko |
214 |
struct policy_manager_entry *new_entry, *ptr; |
1197 |
kumaneko |
652 |
static DEFINE_MUTEX(lock); |
1198 |
kumaneko |
111 |
const struct path_info *saved_manager; |
1199 |
|
|
int error = -ENOMEM; |
1200 |
kumaneko |
1006 |
bool is_domain = false; |
1201 |
kumaneko |
1052 |
if (ccs_is_domain_def(manager)) { |
1202 |
|
|
if (!ccs_is_correct_domain(manager, __func__)) |
1203 |
|
|
return -EINVAL; |
1204 |
kumaneko |
1006 |
is_domain = true; |
1205 |
kumaneko |
111 |
} else { |
1206 |
kumaneko |
1052 |
if (!ccs_is_correct_path(manager, 1, -1, -1, __func__)) |
1207 |
|
|
return -EINVAL; |
1208 |
kumaneko |
111 |
} |
1209 |
kumaneko |
1052 |
saved_manager = ccs_save_name(manager); |
1210 |
|
|
if (!saved_manager) |
1211 |
|
|
return -ENOMEM; |
1212 |
kumaneko |
652 |
mutex_lock(&lock); |
1213 |
kumaneko |
722 |
list1_for_each_entry(ptr, &policy_manager_list, list) { |
1214 |
kumaneko |
111 |
if (ptr->manager == saved_manager) { |
1215 |
|
|
ptr->is_deleted = is_delete; |
1216 |
|
|
error = 0; |
1217 |
|
|
goto out; |
1218 |
|
|
} |
1219 |
|
|
} |
1220 |
|
|
if (is_delete) { |
1221 |
|
|
error = -ENOENT; |
1222 |
|
|
goto out; |
1223 |
|
|
} |
1224 |
kumaneko |
1052 |
new_entry = ccs_alloc_element(sizeof(*new_entry)); |
1225 |
|
|
if (!new_entry) |
1226 |
|
|
goto out; |
1227 |
kumaneko |
111 |
new_entry->manager = saved_manager; |
1228 |
|
|
new_entry->is_domain = is_domain; |
1229 |
kumaneko |
722 |
list1_add_tail_mb(&new_entry->list, &policy_manager_list); |
1230 |
kumaneko |
111 |
error = 0; |
1231 |
|
|
out: |
1232 |
kumaneko |
652 |
mutex_unlock(&lock); |
1233 |
kumaneko |
1052 |
if (!error) |
1234 |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_MANAGER); |
1235 |
kumaneko |
111 |
return error; |
1236 |
|
|
} |
1237 |
|
|
|
1238 |
kumaneko |
1052 |
/** |
1239 |
|
|
* write_manager_policy - Write manager policy. |
1240 |
|
|
* |
1241 |
|
|
* @head: Pointer to "struct ccs_io_buffer" |
1242 |
|
|
* |
1243 |
|
|
* Returns 0 on success, negative value otherwise. |
1244 |
|
|
*/ |
1245 |
|
|
static int write_manager_policy(struct ccs_io_buffer *head) |
1246 |
kumaneko |
111 |
{ |
1247 |
kumaneko |
1052 |
char *data = head->write_buf; |
1248 |
|
|
bool is_delete = str_starts(&data, KEYWORD_DELETE); |
1249 |
kumaneko |
1006 |
if (strcmp(data, "manage_by_non_root") == 0) { |
1250 |
kumaneko |
1029 |
manage_by_non_root = !is_delete; |
1251 |
kumaneko |
1006 |
return 0; |
1252 |
|
|
} |
1253 |
kumaneko |
1052 |
return update_manager_entry(data, is_delete); |
1254 |
kumaneko |
111 |
} |
1255 |
|
|
|
1256 |
kumaneko |
1052 |
/** |
1257 |
|
|
* read_manager_policy - Read manager policy. |
1258 |
|
|
* |
1259 |
|
|
* @head: Pointer to "struct ccs_io_buffer" |
1260 |
|
|
* |
1261 |
|
|
* Returns 0. |
1262 |
|
|
*/ |
1263 |
|
|
static int read_manager_policy(struct ccs_io_buffer *head) |
1264 |
kumaneko |
111 |
{ |
1265 |
kumaneko |
722 |
struct list1_head *pos; |
1266 |
kumaneko |
1052 |
if (head->read_eof) |
1267 |
|
|
return 0; |
1268 |
kumaneko |
722 |
list1_for_each_cookie(pos, head->read_var2, &policy_manager_list) { |
1269 |
kumaneko |
708 |
struct policy_manager_entry *ptr; |
1270 |
kumaneko |
722 |
ptr = list1_entry(pos, struct policy_manager_entry, list); |
1271 |
kumaneko |
1052 |
if (ptr->is_deleted) |
1272 |
|
|
continue; |
1273 |
|
|
if (!ccs_io_printf(head, "%s\n", ptr->manager->name)) |
1274 |
|
|
return 0; |
1275 |
kumaneko |
111 |
} |
1276 |
kumaneko |
1006 |
head->read_eof = true; |
1277 |
kumaneko |
111 |
return 0; |
1278 |
|
|
} |
1279 |
|
|
|
1280 |
kumaneko |
1052 |
/** |
1281 |
|
|
* is_policy_manager - Check whether the current process is a policy manager. |
1282 |
|
|
* |
1283 |
|
|
* Returns true if the current process is permitted to modify policy |
1284 |
|
|
* via /proc/ccs/ interface. |
1285 |
|
|
*/ |
1286 |
|
|
static bool is_policy_manager(void) |
1287 |
kumaneko |
111 |
{ |
1288 |
kumaneko |
214 |
struct policy_manager_entry *ptr; |
1289 |
kumaneko |
111 |
const char *exe; |
1290 |
kumaneko |
1006 |
const struct task_struct *task = current; |
1291 |
|
|
const struct path_info *domainname = task->domain_info->domainname; |
1292 |
|
|
bool found = false; |
1293 |
kumaneko |
1052 |
if (!sbin_init_started) |
1294 |
|
|
return true; |
1295 |
|
|
if (!manage_by_non_root && (task->uid || task->euid)) |
1296 |
|
|
return false; |
1297 |
kumaneko |
722 |
list1_for_each_entry(ptr, &policy_manager_list, list) { |
1298 |
kumaneko |
1052 |
if (!ptr->is_deleted && ptr->is_domain |
1299 |
|
|
&& !ccs_pathcmp(domainname, ptr->manager)) |
1300 |
|
|
return true; |
1301 |
kumaneko |
111 |
} |
1302 |
kumaneko |
1052 |
exe = ccs_get_exe(); |
1303 |
|
|
if (!exe) |
1304 |
|
|
return false; |
1305 |
kumaneko |
722 |
list1_for_each_entry(ptr, &policy_manager_list, list) { |
1306 |
kumaneko |
1052 |
if (!ptr->is_deleted && !ptr->is_domain |
1307 |
|
|
&& !strcmp(exe, ptr->manager->name)) { |
1308 |
kumaneko |
1006 |
found = true; |
1309 |
kumaneko |
708 |
break; |
1310 |
|
|
} |
1311 |
kumaneko |
111 |
} |
1312 |
kumaneko |
708 |
if (!found) { /* Reduce error messages. */ |
1313 |
kumaneko |
1052 |
static pid_t last_pid; |
1314 |
kumaneko |
111 |
const pid_t pid = current->pid; |
1315 |
|
|
if (last_pid != pid) { |
1316 |
kumaneko |
1052 |
printk(KERN_WARNING "%s ( %s ) is not permitted to " |
1317 |
|
|
"update policies.\n", domainname->name, exe); |
1318 |
kumaneko |
111 |
last_pid = pid; |
1319 |
|
|
} |
1320 |
|
|
} |
1321 |
|
|
ccs_free(exe); |
1322 |
kumaneko |
708 |
return found; |
1323 |
kumaneko |
111 |
} |
1324 |
|
|
|
1325 |
|
|
#ifdef CONFIG_TOMOYO |
1326 |
|
|
|
1327 |
kumaneko |
1052 |
/** |
1328 |
|
|
* ccs_find_condition_part - Find condition part from the statement. |
1329 |
|
|
* |
1330 |
|
|
* @data: String to parse. |
1331 |
|
|
* |
1332 |
|
|
* Returns pointer to the condition part if it was found in the statement, |
1333 |
|
|
* NULL otherwise. |
1334 |
|
|
*/ |
1335 |
|
|
static char *ccs_find_condition_part(char *data) |
1336 |
kumaneko |
581 |
{ |
1337 |
|
|
char *cp = strstr(data, " if "), *cp2; |
1338 |
|
|
if (cp) { |
1339 |
|
|
while ((cp2 = strstr(cp + 3, " if ")) != NULL) cp = cp2; |
1340 |
|
|
*cp++ = '\0'; |
1341 |
kumaneko |
1052 |
} else { |
1342 |
|
|
cp = strstr(data, " ; set "); |
1343 |
|
|
if (cp) |
1344 |
|
|
*cp++ = '\0'; |
1345 |
kumaneko |
581 |
} |
1346 |
|
|
return cp; |
1347 |
|
|
} |
1348 |
|
|
|
1349 |
kumaneko |
1052 |
/** |
1350 |
|
|
* write_domain_policy - Write domain policy. |
1351 |
|
|
* |
1352 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1353 |
|
|
* |
1354 |
|
|
* Returns 0 on success, negative value otherwise. |
1355 |
|
|
*/ |
1356 |
|
|
static int write_domain_policy(struct ccs_io_buffer *head) |
1357 |
kumaneko |
111 |
{ |
1358 |
|
|
char *data = head->write_buf; |
1359 |
|
|
struct domain_info *domain = head->write_var1; |
1360 |
kumaneko |
1006 |
bool is_delete = false, is_select = false, is_undelete = false; |
1361 |
kumaneko |
111 |
unsigned int profile; |
1362 |
kumaneko |
581 |
const struct condition_list *cond = NULL; |
1363 |
kumaneko |
906 |
char *cp; |
1364 |
kumaneko |
1052 |
if (str_starts(&data, KEYWORD_DELETE)) |
1365 |
kumaneko |
1006 |
is_delete = true; |
1366 |
kumaneko |
1052 |
else if (str_starts(&data, KEYWORD_SELECT)) |
1367 |
kumaneko |
1006 |
is_select = true; |
1368 |
kumaneko |
1052 |
else if (str_starts(&data, KEYWORD_UNDELETE)) |
1369 |
kumaneko |
1006 |
is_undelete = true; |
1370 |
kumaneko |
1052 |
if (ccs_is_domain_def(data)) { |
1371 |
kumaneko |
111 |
if (is_delete) { |
1372 |
kumaneko |
1052 |
ccs_delete_domain(data); |
1373 |
kumaneko |
111 |
domain = NULL; |
1374 |
|
|
} else if (is_select) { |
1375 |
kumaneko |
1052 |
domain = ccs_find_domain(data); |
1376 |
kumaneko |
111 |
} else if (is_undelete) { |
1377 |
kumaneko |
1052 |
domain = ccs_undelete_domain(data); |
1378 |
kumaneko |
111 |
} else { |
1379 |
kumaneko |
1052 |
domain = ccs_find_or_assign_new_domain(data, 0); |
1380 |
kumaneko |
111 |
} |
1381 |
|
|
head->write_var1 = domain; |
1382 |
kumaneko |
1052 |
ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
1383 |
kumaneko |
111 |
return 0; |
1384 |
|
|
} |
1385 |
kumaneko |
1052 |
if (!domain) |
1386 |
|
|
return -EINVAL; |
1387 |
kumaneko |
581 |
|
1388 |
kumaneko |
1052 |
if (sscanf(data, KEYWORD_USE_PROFILE "%u", &profile) == 1 |
1389 |
|
|
&& profile < MAX_PROFILES) { |
1390 |
|
|
if (profile_ptr[profile] || !sbin_init_started) |
1391 |
|
|
domain->profile = (u8) profile; |
1392 |
kumaneko |
581 |
return 0; |
1393 |
|
|
} |
1394 |
kumaneko |
1052 |
if (!strcmp(data, KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { |
1395 |
|
|
ccs_set_domain_flag(domain, is_delete, |
1396 |
|
|
DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ); |
1397 |
kumaneko |
1007 |
return 0; |
1398 |
|
|
} |
1399 |
kumaneko |
1052 |
if (!strcmp(data, KEYWORD_IGNORE_GLOBAL_ALLOW_ENV)) { |
1400 |
|
|
ccs_set_domain_flag(domain, is_delete, |
1401 |
|
|
DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_ENV); |
1402 |
kumaneko |
1007 |
return 0; |
1403 |
|
|
} |
1404 |
kumaneko |
1052 |
cp = ccs_find_condition_part(data); |
1405 |
|
|
if (cp) { |
1406 |
|
|
cond = ccs_find_or_assign_new_condition(cp); |
1407 |
|
|
if (!cond) |
1408 |
|
|
return -EINVAL; |
1409 |
kumaneko |
111 |
} |
1410 |
kumaneko |
1052 |
if (str_starts(&data, KEYWORD_ALLOW_CAPABILITY)) |
1411 |
|
|
return ccs_write_capability_policy(data, domain, cond, |
1412 |
|
|
is_delete); |
1413 |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_NETWORK)) |
1414 |
|
|
return ccs_write_network_policy(data, domain, cond, is_delete); |
1415 |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_SIGNAL)) |
1416 |
|
|
return ccs_write_signal_policy(data, domain, cond, is_delete); |
1417 |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_ARGV0)) |
1418 |
|
|
return ccs_write_argv0_policy(data, domain, cond, is_delete); |
1419 |
|
|
else if (str_starts(&data, KEYWORD_ALLOW_ENV)) |
1420 |
|
|
return ccs_write_env_policy(data, domain, cond, is_delete); |
1421 |
|
|
else |
1422 |
|
|
return ccs_write_file_policy(data, domain, cond, is_delete); |
1423 |
kumaneko |
111 |
} |
1424 |
|
|
|
1425 |
kumaneko |
1052 |
/** |
1426 |
kumaneko |
1054 |
* print_single_path_acl - Print a single path ACL entry. |
1427 |
kumaneko |
1052 |
* |
1428 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1429 |
|
|
* @ptr: Pointer to "struct single_path_acl_record". |
1430 |
|
|
* @cond: Pointer to "struct condition_list *". May be NULL. |
1431 |
|
|
* |
1432 |
|
|
* Returns true on success, false otherwise. |
1433 |
|
|
*/ |
1434 |
|
|
static bool print_single_path_acl(struct ccs_io_buffer *head, |
1435 |
|
|
struct single_path_acl_record *ptr, |
1436 |
|
|
const struct condition_list *cond) |
1437 |
kumaneko |
856 |
{ |
1438 |
|
|
int pos; |
1439 |
|
|
u8 bit; |
1440 |
kumaneko |
1052 |
const char *atmark = ""; |
1441 |
|
|
const char *filename; |
1442 |
kumaneko |
856 |
const u16 perm = ptr->perm; |
1443 |
kumaneko |
1052 |
if (ptr->u_is_group) { |
1444 |
|
|
atmark = "@"; |
1445 |
|
|
filename = ptr->u.group->group_name->name; |
1446 |
|
|
} else { |
1447 |
|
|
filename = ptr->u.filename->name; |
1448 |
|
|
} |
1449 |
kumaneko |
856 |
for (bit = head->read_bit; bit < MAX_SINGLE_PATH_OPERATION; bit++) { |
1450 |
|
|
const char *msg; |
1451 |
kumaneko |
1052 |
if (!(perm & (1 << bit))) |
1452 |
|
|
continue; |
1453 |
kumaneko |
856 |
/* Print "read/write" instead of "read" and "write". */ |
1454 |
kumaneko |
1052 |
if ((bit == TYPE_READ_ACL || bit == TYPE_WRITE_ACL) |
1455 |
|
|
&& (perm & (1 << TYPE_READ_WRITE_ACL))) |
1456 |
|
|
continue; |
1457 |
|
|
msg = ccs_sp2keyword(bit); |
1458 |
kumaneko |
856 |
pos = head->read_avail; |
1459 |
kumaneko |
1052 |
if (!ccs_io_printf(head, "allow_%s %s%s", msg, |
1460 |
|
|
atmark, filename) || |
1461 |
kumaneko |
1054 |
!ccs_print_condition(head, cond)) |
1462 |
kumaneko |
1052 |
goto out; |
1463 |
kumaneko |
856 |
} |
1464 |
|
|
head->read_bit = 0; |
1465 |
kumaneko |
1006 |
return true; |
1466 |
kumaneko |
856 |
out: |
1467 |
|
|
head->read_bit = bit; |
1468 |
|
|
head->read_avail = pos; |
1469 |
kumaneko |
1006 |
return false; |
1470 |
kumaneko |
856 |
} |
1471 |
|
|
|
1472 |
kumaneko |
1052 |
/** |
1473 |
kumaneko |
1054 |
* print_double_path_acl - Print a double path ACL entry. |
1474 |
kumaneko |
1052 |
* |
1475 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1476 |
|
|
* @ptr: Pointer to "struct double_path_acl_record". |
1477 |
|
|
* @cond: Pointer to "struct condition_list *". May be NULL. |
1478 |
|
|
* |
1479 |
|
|
* Returns true on success, false otherwise. |
1480 |
|
|
*/ |
1481 |
|
|
static bool print_double_path_acl(struct ccs_io_buffer *head, |
1482 |
|
|
struct double_path_acl_record *ptr, |
1483 |
|
|
const struct condition_list *cond) |
1484 |
kumaneko |
856 |
{ |
1485 |
|
|
int pos; |
1486 |
kumaneko |
1052 |
const char *atmark1 = ""; |
1487 |
|
|
const char *atmark2 = ""; |
1488 |
|
|
const char *filename1; |
1489 |
|
|
const char *filename2; |
1490 |
kumaneko |
856 |
const u8 perm = ptr->perm; |
1491 |
|
|
u8 bit; |
1492 |
kumaneko |
1052 |
if (ptr->u1_is_group) { |
1493 |
|
|
atmark1 = "@"; |
1494 |
|
|
filename1 = ptr->u1.group1->group_name->name; |
1495 |
|
|
} else { |
1496 |
|
|
filename1 = ptr->u1.filename1->name; |
1497 |
|
|
} |
1498 |
|
|
if (ptr->u2_is_group) { |
1499 |
|
|
atmark2 = "@"; |
1500 |
|
|
filename2 = ptr->u2.group2->group_name->name; |
1501 |
|
|
} else { |
1502 |
|
|
filename2 = ptr->u2.filename2->name; |
1503 |
|
|
} |
1504 |
kumaneko |
856 |
for (bit = head->read_bit; bit < MAX_DOUBLE_PATH_OPERATION; bit++) { |
1505 |
|
|
const char *msg; |
1506 |
kumaneko |
1052 |
if (!(perm & (1 << bit))) |
1507 |
|
|
continue; |
1508 |
|
|
msg = ccs_dp2keyword(bit); |
1509 |
kumaneko |
856 |
pos = head->read_avail; |
1510 |
kumaneko |
1052 |
if (!ccs_io_printf(head, "allow_%s %s%s %s%s", msg, |
1511 |
|
|
atmark1, filename1, |
1512 |
|
|
atmark2, filename2) || |
1513 |
kumaneko |
1054 |
!ccs_print_condition(head, cond)) |
1514 |
kumaneko |
1052 |
goto out; |
1515 |
kumaneko |
856 |
} |
1516 |
kumaneko |
1032 |
head->read_bit = 0; |
1517 |
kumaneko |
1006 |
return true; |
1518 |
kumaneko |
856 |
out: |
1519 |
|
|
head->read_bit = bit; |
1520 |
|
|
head->read_avail = pos; |
1521 |
kumaneko |
1006 |
return false; |
1522 |
kumaneko |
856 |
} |
1523 |
|
|
|
1524 |
kumaneko |
1052 |
/** |
1525 |
kumaneko |
1054 |
* print_argv0_acl - Print an argv[0] ACL entry. |
1526 |
kumaneko |
1052 |
* |
1527 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1528 |
|
|
* @ptr: Pointer to "struct argv0_acl_record". |
1529 |
|
|
* @cond: Pointer to "struct condition_list *". May be NULL. |
1530 |
|
|
* |
1531 |
|
|
* Returns true on success, false otherwise. |
1532 |
|
|
*/ |
1533 |
|
|
static bool print_argv0_acl(struct ccs_io_buffer *head, |
1534 |
|
|
struct argv0_acl_record *ptr, |
1535 |
|
|
const struct condition_list *cond) |
1536 |
kumaneko |
856 |
{ |
1537 |
|
|
int pos = head->read_avail; |
1538 |
kumaneko |
1052 |
if (!ccs_io_printf(head, KEYWORD_ALLOW_ARGV0 "%s %s", |
1539 |
|
|
ptr->filename->name, ptr->argv0->name)) |
1540 |
|
|
goto out; |
1541 |
kumaneko |
1054 |
if (!ccs_print_condition(head, cond)) |
1542 |
kumaneko |
1052 |
goto out; |
1543 |
kumaneko |
1006 |
return true; |
1544 |
kumaneko |
856 |
out: |
1545 |
|
|
head->read_avail = pos; |
1546 |
kumaneko |
1006 |
return false; |
1547 |
kumaneko |
856 |
} |
1548 |
|
|
|
1549 |
kumaneko |
1052 |
/** |
1550 |
kumaneko |
1054 |
* print_env_acl - Print an evironment variable name's ACL entry. |
1551 |
kumaneko |
1052 |
* |
1552 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1553 |
|
|
* @ptr: Pointer to "struct env_acl_record". |
1554 |
|
|
* @cond: Pointer to "struct condition_list *". May be NULL. |
1555 |
|
|
* |
1556 |
|
|
* Returns true on success, false otherwise. |
1557 |
|
|
*/ |
1558 |
|
|
static bool print_env_acl(struct ccs_io_buffer *head, |
1559 |
|
|
struct env_acl_record *ptr, |
1560 |
|
|
const struct condition_list *cond) |
1561 |
kumaneko |
856 |
{ |
1562 |
|
|
int pos = head->read_avail; |
1563 |
kumaneko |
1052 |
if (!ccs_io_printf(head, KEYWORD_ALLOW_ENV "%s", ptr->env->name)) |
1564 |
|
|
goto out; |
1565 |
kumaneko |
1054 |
if (!ccs_print_condition(head, cond)) |
1566 |
kumaneko |
1052 |
goto out; |
1567 |
kumaneko |
1006 |
return true; |
1568 |
kumaneko |
856 |
out: |
1569 |
|
|
head->read_avail = pos; |
1570 |
kumaneko |
1006 |
return false; |
1571 |
kumaneko |
856 |
} |
1572 |
|
|
|
1573 |
kumaneko |
1052 |
/** |
1574 |
kumaneko |
1054 |
* print_capability_acl - Print a capability ACL entry. |
1575 |
kumaneko |
1052 |
* |
1576 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1577 |
|
|
* @ptr: Pointer to "struct capability_acl_record". |
1578 |
|
|
* @cond: Pointer to "struct condition_list *". May be NULL. |
1579 |
|
|
* |
1580 |
|
|
* Returns true on success, false otherwise. |
1581 |
|
|
*/ |
1582 |
|
|
static bool print_capability_acl(struct ccs_io_buffer *head, |
1583 |
|
|
struct capability_acl_record *ptr, |
1584 |
|
|
const struct condition_list *cond) |
1585 |
kumaneko |
856 |
{ |
1586 |
kumaneko |
860 |
int pos = head->read_avail; |
1587 |
kumaneko |
1052 |
if (!ccs_io_printf(head, KEYWORD_ALLOW_CAPABILITY "%s", |
1588 |
|
|
ccs_cap2keyword(ptr->operation))) |
1589 |
|
|
goto out; |
1590 |
kumaneko |
1054 |
if (!ccs_print_condition(head, cond)) |
1591 |
kumaneko |
1052 |
goto out; |
1592 |
kumaneko |
1006 |
return true; |
1593 |
kumaneko |
856 |
out: |
1594 |
|
|
head->read_avail = pos; |
1595 |
kumaneko |
1006 |
return false; |
1596 |
kumaneko |
856 |
} |
1597 |
|
|
|
1598 |
kumaneko |
1052 |
/** |
1599 |
kumaneko |
1054 |
* print_ipv4_entry - Print IPv4 address of a network ACL entry. |
1600 |
kumaneko |
1052 |
* |
1601 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1602 |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
1603 |
|
|
* |
1604 |
|
|
* Returns true on success, false otherwise. |
1605 |
|
|
*/ |
1606 |
|
|
static bool print_ipv4_entry(struct ccs_io_buffer *head, |
1607 |
|
|
struct ip_network_acl_record *ptr) |
1608 |
kumaneko |
856 |
{ |
1609 |
kumaneko |
1052 |
const u32 min_address = ptr->u.ipv4.min; |
1610 |
|
|
const u32 max_address = ptr->u.ipv4.max; |
1611 |
|
|
if (!ccs_io_printf(head, "%u.%u.%u.%u", HIPQUAD(min_address))) |
1612 |
|
|
return false; |
1613 |
|
|
if (min_address != max_address |
1614 |
|
|
&& !ccs_io_printf(head, "-%u.%u.%u.%u", HIPQUAD(max_address))) |
1615 |
|
|
return false; |
1616 |
|
|
return true; |
1617 |
|
|
} |
1618 |
|
|
|
1619 |
|
|
/** |
1620 |
kumaneko |
1054 |
* print_ipv6_entry - Print IPv6 address of a network ACL entry. |
1621 |
kumaneko |
1052 |
* |
1622 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1623 |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
1624 |
|
|
* |
1625 |
|
|
* Returns true on success, false otherwise. |
1626 |
|
|
*/ |
1627 |
|
|
static bool print_ipv6_entry(struct ccs_io_buffer *head, |
1628 |
|
|
struct ip_network_acl_record *ptr) |
1629 |
|
|
{ |
1630 |
|
|
char buf[64]; |
1631 |
|
|
const struct in6_addr *min_address = ptr->u.ipv6.min; |
1632 |
|
|
const struct in6_addr *max_address = ptr->u.ipv6.max; |
1633 |
|
|
ccs_print_ipv6(buf, sizeof(buf), min_address); |
1634 |
|
|
if (!ccs_io_printf(head, "%s", buf)) |
1635 |
|
|
return false; |
1636 |
|
|
if (min_address != max_address) { |
1637 |
|
|
ccs_print_ipv6(buf, sizeof(buf), max_address); |
1638 |
|
|
if (!ccs_io_printf(head, "-%s", buf)) |
1639 |
|
|
return false; |
1640 |
|
|
} |
1641 |
|
|
return true; |
1642 |
|
|
} |
1643 |
|
|
|
1644 |
|
|
/** |
1645 |
kumaneko |
1054 |
* print_port_entry - Print port number of a network ACL entry. |
1646 |
kumaneko |
1052 |
* |
1647 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1648 |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
1649 |
|
|
* |
1650 |
|
|
* Returns true on success, false otherwise. |
1651 |
|
|
*/ |
1652 |
|
|
static bool print_port_entry(struct ccs_io_buffer *head, |
1653 |
|
|
struct ip_network_acl_record *ptr) |
1654 |
|
|
{ |
1655 |
|
|
const u16 min_port = ptr->min_port, max_port = ptr->max_port; |
1656 |
|
|
if (!ccs_io_printf(head, " %u", min_port)) |
1657 |
|
|
return false; |
1658 |
|
|
if (min_port != max_port && !ccs_io_printf(head, "-%u", max_port)) |
1659 |
|
|
return false; |
1660 |
|
|
return true; |
1661 |
|
|
} |
1662 |
|
|
|
1663 |
|
|
/** |
1664 |
kumaneko |
1054 |
* print_network_acl - Print a network ACL entry. |
1665 |
kumaneko |
1052 |
* |
1666 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1667 |
|
|
* @ptr: Pointer to "struct ip_network_acl_record". |
1668 |
|
|
* @cond: Pointer to "struct condition_list *". May be NULL. |
1669 |
|
|
* |
1670 |
|
|
* Returns true on success, false otherwise. |
1671 |
|
|
*/ |
1672 |
|
|
static bool print_network_acl(struct ccs_io_buffer *head, |
1673 |
|
|
struct ip_network_acl_record *ptr, |
1674 |
|
|
const struct condition_list *cond) |
1675 |
|
|
{ |
1676 |
kumaneko |
856 |
int pos = head->read_avail; |
1677 |
kumaneko |
1052 |
if (!ccs_io_printf(head, KEYWORD_ALLOW_NETWORK "%s ", |
1678 |
|
|
ccs_net2keyword(ptr->operation_type))) |
1679 |
|
|
goto out; |
1680 |
kumaneko |
856 |
switch (ptr->record_type) { |
1681 |
|
|
case IP_RECORD_TYPE_ADDRESS_GROUP: |
1682 |
kumaneko |
1052 |
if (!ccs_io_printf(head, "@%s", ptr->u.group->group_name->name)) |
1683 |
|
|
goto out; |
1684 |
kumaneko |
856 |
break; |
1685 |
|
|
case IP_RECORD_TYPE_IPv4: |
1686 |
kumaneko |
1052 |
if (!print_ipv4_entry(head, ptr)) |
1687 |
|
|
goto out; |
1688 |
kumaneko |
856 |
break; |
1689 |
|
|
case IP_RECORD_TYPE_IPv6: |
1690 |
kumaneko |
1052 |
if (!print_ipv6_entry(head, ptr)) |
1691 |
|
|
goto out; |
1692 |
kumaneko |
856 |
break; |
1693 |
|
|
} |
1694 |
kumaneko |
1052 |
if (!print_port_entry(head, ptr)) |
1695 |
|
|
goto out; |
1696 |
kumaneko |
1054 |
if (!ccs_print_condition(head, cond)) |
1697 |
kumaneko |
1052 |
goto out; |
1698 |
kumaneko |
1006 |
return true; |
1699 |
kumaneko |
856 |
out: |
1700 |
|
|
head->read_avail = pos; |
1701 |
kumaneko |
1006 |
return false; |
1702 |
kumaneko |
856 |
} |
1703 |
|
|
|
1704 |
kumaneko |
1052 |
/** |
1705 |
kumaneko |
1054 |
* print_signal_acl - Print a signal ACL entry. |
1706 |
kumaneko |
1052 |
* |
1707 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1708 |
|
|
* @ptr: Pointer to "struct signale_acl_record". |
1709 |
|
|
* @cond: Pointer to "struct condition_list *". May be NULL. |
1710 |
|
|
* |
1711 |
|
|
* Returns true on success, false otherwise. |
1712 |
|
|
*/ |
1713 |
|
|
static bool print_signal_acl(struct ccs_io_buffer *head, |
1714 |
|
|
struct signal_acl_record *ptr, |
1715 |
|
|
const struct condition_list *cond) |
1716 |
kumaneko |
856 |
{ |
1717 |
|
|
int pos = head->read_avail; |
1718 |
kumaneko |
1052 |
if (!ccs_io_printf(head, KEYWORD_ALLOW_SIGNAL "%u %s", |
1719 |
|
|
ptr->sig, ptr->domainname->name)) |
1720 |
|
|
goto out; |
1721 |
kumaneko |
1054 |
if (!ccs_print_condition(head, cond)) |
1722 |
kumaneko |
1052 |
goto out; |
1723 |
kumaneko |
1006 |
return true; |
1724 |
kumaneko |
856 |
out: |
1725 |
|
|
head->read_avail = pos; |
1726 |
kumaneko |
1006 |
return false; |
1727 |
kumaneko |
856 |
} |
1728 |
|
|
|
1729 |
kumaneko |
1052 |
/** |
1730 |
kumaneko |
1054 |
* print_execute_handler_record - Print an execute handler ACL entry. |
1731 |
kumaneko |
1052 |
* |
1732 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1733 |
|
|
* @keyword: Name of the keyword. |
1734 |
|
|
* @ptr: Pointer to "struct execute_handler_record". |
1735 |
|
|
* |
1736 |
|
|
* Returns true on success, false otherwise. |
1737 |
|
|
*/ |
1738 |
|
|
static bool print_execute_handler_record(struct ccs_io_buffer *head, |
1739 |
|
|
const char *keyword, |
1740 |
|
|
struct execute_handler_record *ptr) |
1741 |
kumaneko |
1029 |
{ |
1742 |
kumaneko |
1052 |
return ccs_io_printf(head, "%s %s\n", keyword, ptr->handler->name); |
1743 |
kumaneko |
1029 |
} |
1744 |
|
|
|
1745 |
kumaneko |
1052 |
/** |
1746 |
kumaneko |
1054 |
* print_entry - Print an ACL entry. |
1747 |
kumaneko |
1052 |
* |
1748 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1749 |
|
|
* @ptr: Pointer to an ACL entry. |
1750 |
|
|
* |
1751 |
|
|
* Returns true on success, false otherwise. |
1752 |
|
|
*/ |
1753 |
|
|
static bool print_entry(struct ccs_io_buffer *head, struct acl_info *ptr) |
1754 |
kumaneko |
111 |
{ |
1755 |
kumaneko |
1052 |
const struct condition_list *cond = ccs_get_condition_part(ptr); |
1756 |
|
|
const u8 acl_type = ptr->type & ~ACL_WITH_CONDITION; |
1757 |
|
|
if (acl_type & ACL_DELETED) |
1758 |
|
|
return true; |
1759 |
|
|
if (acl_type == TYPE_SINGLE_PATH_ACL) { |
1760 |
|
|
struct single_path_acl_record *acl |
1761 |
|
|
= container_of(ptr, struct single_path_acl_record, |
1762 |
|
|
head); |
1763 |
|
|
return print_single_path_acl(head, acl, cond); |
1764 |
|
|
} |
1765 |
|
|
if (acl_type == TYPE_DOUBLE_PATH_ACL) { |
1766 |
|
|
struct double_path_acl_record *acl |
1767 |
|
|
= container_of(ptr, struct double_path_acl_record, |
1768 |
|
|
head); |
1769 |
|
|
return print_double_path_acl(head, acl, cond); |
1770 |
|
|
} |
1771 |
|
|
if (acl_type == TYPE_ARGV0_ACL) { |
1772 |
|
|
struct argv0_acl_record *acl |
1773 |
|
|
= container_of(ptr, struct argv0_acl_record, head); |
1774 |
|
|
return print_argv0_acl(head, acl, cond); |
1775 |
|
|
} |
1776 |
|
|
if (acl_type == TYPE_ENV_ACL) { |
1777 |
|
|
struct env_acl_record *acl |
1778 |
|
|
= container_of(ptr, struct env_acl_record, head); |
1779 |
|
|
return print_env_acl(head, acl, cond); |
1780 |
|
|
} |
1781 |
|
|
if (acl_type == TYPE_CAPABILITY_ACL) { |
1782 |
|
|
struct capability_acl_record *acl |
1783 |
|
|
= container_of(ptr, struct capability_acl_record, head); |
1784 |
|
|
return print_capability_acl(head, acl, cond); |
1785 |
|
|
} |
1786 |
|
|
if (acl_type == TYPE_IP_NETWORK_ACL) { |
1787 |
|
|
struct ip_network_acl_record *acl |
1788 |
|
|
= container_of(ptr, struct ip_network_acl_record, head); |
1789 |
|
|
return print_network_acl(head, acl, cond); |
1790 |
|
|
} |
1791 |
|
|
if (acl_type == TYPE_SIGNAL_ACL) { |
1792 |
|
|
struct signal_acl_record *acl |
1793 |
|
|
= container_of(ptr, struct signal_acl_record, head); |
1794 |
|
|
return print_signal_acl(head, acl, cond); |
1795 |
|
|
} |
1796 |
|
|
if (acl_type == TYPE_PREFERRED_EXECUTE_HANDLER) { |
1797 |
|
|
struct execute_handler_record *acl |
1798 |
|
|
= container_of(ptr, struct execute_handler_record, |
1799 |
|
|
head); |
1800 |
|
|
const char *keyword = KEYWORD_PREFERRED_EXECUTE_HANDLER; |
1801 |
|
|
return print_execute_handler_record(head, keyword, acl); |
1802 |
|
|
} |
1803 |
|
|
if (acl_type == TYPE_DEFAULT_EXECUTE_HANDLER) { |
1804 |
|
|
struct execute_handler_record *acl |
1805 |
|
|
= container_of(ptr, struct execute_handler_record, |
1806 |
|
|
head); |
1807 |
|
|
const char *keyword = KEYWORD_DEFAULT_EXECUTE_HANDLER; |
1808 |
|
|
return print_execute_handler_record(head, keyword, acl); |
1809 |
|
|
} |
1810 |
|
|
BUG(); /* This must not happen. */ |
1811 |
|
|
return false; |
1812 |
|
|
} |
1813 |
|
|
|
1814 |
|
|
/** |
1815 |
|
|
* read_domain_policy - Read domain policy. |
1816 |
|
|
* |
1817 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1818 |
|
|
* |
1819 |
|
|
* Returns 0. |
1820 |
|
|
*/ |
1821 |
|
|
static int read_domain_policy(struct ccs_io_buffer *head) |
1822 |
|
|
{ |
1823 |
kumaneko |
722 |
struct list1_head *dpos; |
1824 |
|
|
struct list1_head *apos; |
1825 |
kumaneko |
1052 |
if (head->read_eof) |
1826 |
|
|
return 0; |
1827 |
|
|
if (head->read_step == 0) |
1828 |
|
|
head->read_step = 1; |
1829 |
kumaneko |
722 |
list1_for_each_cookie(dpos, head->read_var1, &domain_list) { |
1830 |
kumaneko |
708 |
struct domain_info *domain; |
1831 |
kumaneko |
1052 |
const char *quota_exceeded = ""; |
1832 |
|
|
const char *ignore_global_allow_read = ""; |
1833 |
|
|
const char *ignore_global_allow_env = ""; |
1834 |
kumaneko |
722 |
domain = list1_entry(dpos, struct domain_info, list); |
1835 |
kumaneko |
1052 |
if (head->read_step != 1) |
1836 |
|
|
goto acl_loop; |
1837 |
|
|
if (domain->is_deleted) |
1838 |
|
|
continue; |
1839 |
kumaneko |
1054 |
/* Print domainname and flags. */ |
1840 |
kumaneko |
1052 |
if (domain->quota_warned) |
1841 |
|
|
quota_exceeded = "quota_exceeded\n"; |
1842 |
|
|
if (domain->flags & DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ) |
1843 |
|
|
ignore_global_allow_read |
1844 |
|
|
= KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n"; |
1845 |
|
|
if (domain->flags & DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_ENV) |
1846 |
|
|
ignore_global_allow_env |
1847 |
|
|
= KEYWORD_IGNORE_GLOBAL_ALLOW_ENV "\n"; |
1848 |
|
|
if (!ccs_io_printf(head, "%s\n" KEYWORD_USE_PROFILE "%u\n" |
1849 |
|
|
"%s%s%s\n", domain->domainname->name, |
1850 |
|
|
domain->profile, quota_exceeded, |
1851 |
|
|
ignore_global_allow_read, |
1852 |
|
|
ignore_global_allow_env)) |
1853 |
|
|
return 0; |
1854 |
kumaneko |
708 |
head->read_step = 2; |
1855 |
kumaneko |
1052 |
acl_loop: |
1856 |
|
|
if (head->read_step == 3) |
1857 |
|
|
goto tail_mark; |
1858 |
kumaneko |
1054 |
/* Print ACL entries in the domain. */ |
1859 |
kumaneko |
1052 |
list1_for_each_cookie(apos, head->read_var2, |
1860 |
|
|
&domain->acl_info_list) { |
1861 |
|
|
struct acl_info *ptr |
1862 |
|
|
= list1_entry(apos, struct acl_info, list); |
1863 |
|
|
if (!print_entry(head, ptr)) |
1864 |
|
|
return 0; |
1865 |
kumaneko |
111 |
} |
1866 |
kumaneko |
708 |
head->read_step = 3; |
1867 |
kumaneko |
1052 |
tail_mark: |
1868 |
|
|
if (!ccs_io_printf(head, "\n")) |
1869 |
|
|
return 0; |
1870 |
kumaneko |
708 |
head->read_step = 1; |
1871 |
kumaneko |
111 |
} |
1872 |
kumaneko |
1006 |
head->read_eof = true; |
1873 |
kumaneko |
111 |
return 0; |
1874 |
|
|
} |
1875 |
|
|
|
1876 |
kumaneko |
461 |
#endif |
1877 |
|
|
|
1878 |
kumaneko |
1052 |
/** |
1879 |
|
|
* write_domain_profile - Assign profile for specified domain. |
1880 |
|
|
* |
1881 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1882 |
|
|
* |
1883 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
1884 |
|
|
* |
1885 |
|
|
* This is equivalent to doing |
1886 |
kumaneko |
1054 |
* |
1887 |
|
|
* ( echo "select " $domainname; echo "use_profile " $profile ) | |
1888 |
kumaneko |
1052 |
* /usr/lib/ccs/ccs-loadpolicy -d |
1889 |
|
|
*/ |
1890 |
|
|
static int write_domain_profile(struct ccs_io_buffer *head) |
1891 |
kumaneko |
461 |
{ |
1892 |
|
|
char *data = head->write_buf; |
1893 |
|
|
char *cp = strchr(data, ' '); |
1894 |
|
|
struct domain_info *domain; |
1895 |
|
|
unsigned int profile; |
1896 |
kumaneko |
1052 |
if (!cp) |
1897 |
|
|
return -EINVAL; |
1898 |
kumaneko |
461 |
*cp = '\0'; |
1899 |
kumaneko |
1052 |
domain = ccs_find_domain(cp + 1); |
1900 |
kumaneko |
461 |
profile = simple_strtoul(data, NULL, 10); |
1901 |
kumaneko |
1052 |
if (domain && profile < MAX_PROFILES |
1902 |
|
|
&& (profile_ptr[profile] || !sbin_init_started)) |
1903 |
|
|
domain->profile = (u8) profile; |
1904 |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
1905 |
kumaneko |
461 |
return 0; |
1906 |
|
|
} |
1907 |
|
|
|
1908 |
kumaneko |
1052 |
/** |
1909 |
|
|
* read_domain_profile - Read only domainname and profile. |
1910 |
|
|
* |
1911 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1912 |
|
|
* |
1913 |
|
|
* Returns list of profile number and domainname pairs. |
1914 |
|
|
* |
1915 |
|
|
* This is equivalent to doing |
1916 |
kumaneko |
1054 |
* |
1917 |
|
|
* grep -A 1 '^<kernel>' /proc/ccs/domain_policy | |
1918 |
|
|
* awk ' BEGIN { if ( domainname == "") domainname = $0; |
1919 |
|
|
* else if ( $1 = "use_profile" ) { |
1920 |
|
|
* print $2 " " domainname; domainname = ""; }; ' |
1921 |
kumaneko |
1052 |
*/ |
1922 |
|
|
static int read_domain_profile(struct ccs_io_buffer *head) |
1923 |
kumaneko |
111 |
{ |
1924 |
kumaneko |
722 |
struct list1_head *pos; |
1925 |
kumaneko |
1052 |
if (head->read_eof) |
1926 |
|
|
return 0; |
1927 |
kumaneko |
722 |
list1_for_each_cookie(pos, head->read_var1, &domain_list) { |
1928 |
kumaneko |
111 |
struct domain_info *domain; |
1929 |
kumaneko |
722 |
domain = list1_entry(pos, struct domain_info, list); |
1930 |
kumaneko |
1052 |
if (domain->is_deleted) |
1931 |
|
|
continue; |
1932 |
|
|
if (!ccs_io_printf(head, "%u %s\n", domain->profile, |
1933 |
|
|
domain->domainname->name)) |
1934 |
|
|
return 0; |
1935 |
kumaneko |
111 |
} |
1936 |
kumaneko |
1006 |
head->read_eof = true; |
1937 |
kumaneko |
111 |
return 0; |
1938 |
|
|
} |
1939 |
|
|
|
1940 |
kumaneko |
1052 |
/** |
1941 |
|
|
* write_pid: Specify PID to obtain domainname. |
1942 |
|
|
* |
1943 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1944 |
|
|
* |
1945 |
|
|
* Returns 0. |
1946 |
|
|
*/ |
1947 |
|
|
static int write_pid(struct ccs_io_buffer *head) |
1948 |
kumaneko |
111 |
{ |
1949 |
|
|
head->read_step = (int) simple_strtoul(head->write_buf, NULL, 10); |
1950 |
kumaneko |
1006 |
head->read_eof = false; |
1951 |
kumaneko |
111 |
return 0; |
1952 |
|
|
} |
1953 |
|
|
|
1954 |
kumaneko |
1052 |
/** |
1955 |
|
|
* read_pid - Get domainname of the specified PID. |
1956 |
|
|
* |
1957 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1958 |
|
|
* |
1959 |
|
|
* Returns the domainname which the specified PID is in on success, |
1960 |
|
|
* empty string otherwise. |
1961 |
|
|
* The PID is specified by write_pid() so that the user can obtain |
1962 |
|
|
* using read()/write() interface rather than sysctl() interface. |
1963 |
|
|
*/ |
1964 |
|
|
static int read_pid(struct ccs_io_buffer *head) |
1965 |
kumaneko |
111 |
{ |
1966 |
|
|
if (head->read_avail == 0 && !head->read_eof) { |
1967 |
|
|
const int pid = head->read_step; |
1968 |
|
|
struct task_struct *p; |
1969 |
|
|
struct domain_info *domain = NULL; |
1970 |
|
|
/***** CRITICAL SECTION START *****/ |
1971 |
|
|
read_lock(&tasklist_lock); |
1972 |
|
|
p = find_task_by_pid(pid); |
1973 |
kumaneko |
1052 |
if (p) |
1974 |
|
|
domain = p->domain_info; |
1975 |
kumaneko |
111 |
read_unlock(&tasklist_lock); |
1976 |
|
|
/***** CRITICAL SECTION END *****/ |
1977 |
kumaneko |
1052 |
if (domain) |
1978 |
|
|
ccs_io_printf(head, "%d %u %s", pid, domain->profile, |
1979 |
|
|
domain->domainname->name); |
1980 |
kumaneko |
1006 |
head->read_eof = true; |
1981 |
kumaneko |
111 |
} |
1982 |
|
|
return 0; |
1983 |
|
|
} |
1984 |
|
|
|
1985 |
|
|
#ifdef CONFIG_TOMOYO |
1986 |
|
|
|
1987 |
kumaneko |
1052 |
/** |
1988 |
|
|
* write_exception_policy - Write exception policy. |
1989 |
|
|
* |
1990 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
1991 |
|
|
* |
1992 |
|
|
* Returns 0 on success, negative value otherwise. |
1993 |
|
|
*/ |
1994 |
|
|
static int write_exception_policy(struct ccs_io_buffer *head) |
1995 |
kumaneko |
111 |
{ |
1996 |
|
|
char *data = head->write_buf; |
1997 |
kumaneko |
1052 |
bool is_delete = str_starts(&data, KEYWORD_DELETE); |
1998 |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
1999 |
|
|
if (str_starts(&data, KEYWORD_KEEP_DOMAIN)) |
2000 |
|
|
return ccs_write_domain_keeper_policy(data, false, is_delete); |
2001 |
|
|
if (str_starts(&data, KEYWORD_NO_KEEP_DOMAIN)) |
2002 |
|
|
return ccs_write_domain_keeper_policy(data, true, is_delete); |
2003 |
|
|
if (str_starts(&data, KEYWORD_INITIALIZE_DOMAIN)) |
2004 |
|
|
return ccs_write_domain_initializer_policy(data, false, |
2005 |
|
|
is_delete); |
2006 |
|
|
if (str_starts(&data, KEYWORD_NO_INITIALIZE_DOMAIN)) |
2007 |
|
|
return ccs_write_domain_initializer_policy(data, true, |
2008 |
|
|
is_delete); |
2009 |
|
|
if (str_starts(&data, KEYWORD_ALIAS)) |
2010 |
|
|
return ccs_write_alias_policy(data, is_delete); |
2011 |
|
|
if (str_starts(&data, KEYWORD_AGGREGATOR)) |
2012 |
|
|
return ccs_write_aggregator_policy(data, is_delete); |
2013 |
|
|
if (str_starts(&data, KEYWORD_ALLOW_READ)) |
2014 |
|
|
return ccs_write_globally_readable_policy(data, is_delete); |
2015 |
|
|
if (str_starts(&data, KEYWORD_ALLOW_ENV)) |
2016 |
|
|
return ccs_write_globally_usable_env_policy(data, is_delete); |
2017 |
|
|
if (str_starts(&data, KEYWORD_FILE_PATTERN)) |
2018 |
|
|
return ccs_write_pattern_policy(data, is_delete); |
2019 |
|
|
if (str_starts(&data, KEYWORD_PATH_GROUP)) |
2020 |
|
|
return ccs_write_path_group_policy(data, is_delete); |
2021 |
|
|
if (str_starts(&data, KEYWORD_DENY_REWRITE)) |
2022 |
|
|
return ccs_write_no_rewrite_policy(data, is_delete); |
2023 |
|
|
if (str_starts(&data, KEYWORD_ADDRESS_GROUP)) |
2024 |
|
|
return ccs_write_address_group_policy(data, is_delete); |
2025 |
kumaneko |
111 |
return -EINVAL; |
2026 |
|
|
} |
2027 |
|
|
|
2028 |
kumaneko |
1052 |
/** |
2029 |
|
|
* read_exception_policy - Read exception policy. |
2030 |
|
|
* |
2031 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
2032 |
|
|
* |
2033 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
2034 |
|
|
*/ |
2035 |
|
|
static int read_exception_policy(struct ccs_io_buffer *head) |
2036 |
kumaneko |
111 |
{ |
2037 |
|
|
if (!head->read_eof) { |
2038 |
|
|
switch (head->read_step) { |
2039 |
|
|
case 0: |
2040 |
kumaneko |
1052 |
head->read_var2 = NULL; |
2041 |
|
|
head->read_step = 1; |
2042 |
kumaneko |
111 |
case 1: |
2043 |
kumaneko |
1052 |
if (!ccs_read_domain_keeper_policy(head)) |
2044 |
|
|
break; |
2045 |
|
|
head->read_var2 = NULL; |
2046 |
|
|
head->read_step = 2; |
2047 |
kumaneko |
111 |
case 2: |
2048 |
kumaneko |
1052 |
if (!ccs_read_globally_readable_policy(head)) |
2049 |
|
|
break; |
2050 |
|
|
head->read_var2 = NULL; |
2051 |
|
|
head->read_step = 3; |
2052 |
kumaneko |
111 |
case 3: |
2053 |
kumaneko |
1052 |
if (!ccs_read_globally_usable_env_policy(head)) |
2054 |
|
|
break; |
2055 |
|
|
head->read_var2 = NULL; |
2056 |
|
|
head->read_step = 4; |
2057 |
kumaneko |
111 |
case 4: |
2058 |
kumaneko |
1052 |
if (!ccs_read_domain_initializer_policy(head)) |
2059 |
|
|
break; |
2060 |
|
|
head->read_var2 = NULL; |
2061 |
|
|
head->read_step = 5; |
2062 |
kumaneko |
111 |
case 5: |
2063 |
kumaneko |
1052 |
if (!ccs_read_alias_policy(head)) |
2064 |
|
|
break; |
2065 |
|
|
head->read_var2 = NULL; |
2066 |
|
|
head->read_step = 6; |
2067 |
kumaneko |
111 |
case 6: |
2068 |
kumaneko |
1052 |
if (!ccs_read_aggregator_policy(head)) |
2069 |
|
|
break; |
2070 |
|
|
head->read_var2 = NULL; |
2071 |
|
|
head->read_step = 7; |
2072 |
kumaneko |
111 |
case 7: |
2073 |
kumaneko |
1052 |
if (!ccs_read_file_pattern(head)) |
2074 |
|
|
break; |
2075 |
|
|
head->read_var2 = NULL; |
2076 |
|
|
head->read_step = 8; |
2077 |
kumaneko |
111 |
case 8: |
2078 |
kumaneko |
1052 |
if (!ccs_read_no_rewrite_policy(head)) |
2079 |
|
|
break; |
2080 |
|
|
head->read_var2 = NULL; |
2081 |
|
|
head->read_step = 9; |
2082 |
kumaneko |
581 |
case 9: |
2083 |
kumaneko |
1052 |
if (!ccs_read_path_group_policy(head)) |
2084 |
|
|
break; |
2085 |
|
|
head->read_var1 = NULL; |
2086 |
|
|
head->read_var2 = NULL; |
2087 |
|
|
head->read_step = 10; |
2088 |
kumaneko |
581 |
case 10: |
2089 |
kumaneko |
1052 |
if (!ccs_read_address_group_policy(head)) |
2090 |
|
|
break; |
2091 |
kumaneko |
1006 |
head->read_eof = true; |
2092 |
kumaneko |
111 |
break; |
2093 |
|
|
default: |
2094 |
|
|
return -EINVAL; |
2095 |
|
|
} |
2096 |
|
|
} |
2097 |
|
|
return 0; |
2098 |
|
|
} |
2099 |
|
|
|
2100 |
|
|
#endif |
2101 |
|
|
|
2102 |
|
|
#ifdef CONFIG_SAKURA |
2103 |
|
|
|
2104 |
kumaneko |
1052 |
/** |
2105 |
|
|
* write_system_policy - Write system policy. |
2106 |
|
|
* |
2107 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
2108 |
|
|
* |
2109 |
|
|
* Returns 0 on success, negative value otherwise. |
2110 |
|
|
*/ |
2111 |
|
|
static int write_system_policy(struct ccs_io_buffer *head) |
2112 |
kumaneko |
111 |
{ |
2113 |
|
|
char *data = head->write_buf; |
2114 |
kumaneko |
1006 |
bool is_delete = false; |
2115 |
kumaneko |
1052 |
ccs_update_counter(CCS_UPDATES_COUNTER_SYSTEM_POLICY); |
2116 |
|
|
if (str_starts(&data, KEYWORD_DELETE)) |
2117 |
kumaneko |
1006 |
is_delete = true; |
2118 |
kumaneko |
1052 |
if (str_starts(&data, KEYWORD_ALLOW_MOUNT)) |
2119 |
|
|
return ccs_write_mount_policy(data, is_delete); |
2120 |
|
|
if (str_starts(&data, KEYWORD_DENY_UNMOUNT)) |
2121 |
|
|
return ccs_write_no_umount_policy(data, is_delete); |
2122 |
|
|
if (str_starts(&data, KEYWORD_ALLOW_CHROOT)) |
2123 |
|
|
return ccs_write_chroot_policy(data, is_delete); |
2124 |
|
|
if (str_starts(&data, KEYWORD_ALLOW_PIVOT_ROOT)) |
2125 |
|
|
return ccs_write_pivot_root_policy(data, is_delete); |
2126 |
|
|
if (str_starts(&data, KEYWORD_DENY_AUTOBIND)) |
2127 |
|
|
return ccs_write_reserved_port_policy(data, is_delete); |
2128 |
kumaneko |
111 |
return -EINVAL; |
2129 |
|
|
} |
2130 |
|
|
|
2131 |
kumaneko |
1052 |
/** |
2132 |
|
|
* read_system_policy - Read system policy. |
2133 |
|
|
* |
2134 |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
2135 |
|
|
* |
2136 |
|
|
* Returns 0 on success, -EINVAL otherwise. |
2137 |
|
|
*/ |
2138 |
|
|
static int read_system_policy(struct ccs_io_buffer *head) |
2139 |
kumaneko |
111 |
{ |
2140 |
|
|
if (!head->read_eof) { |
2141 |
|
|
switch (head->read_step) { |
2142 |
|
|
case 0: |
2143 |
kumaneko |
1052 |
head->read_var2 = NULL; |
2144 |
|
|
head->read_step = 1; |
2145 |
kumaneko |
111 |
case 1: |
2146 |
kumaneko |
1052 |
if (!ccs_read_mount_policy(head)) |
2147 |
|
|
break; |
2148 |
|
|
head->read_var2 = NULL; |
2149 |
|
|
head->read_step = 2; |
2150 |
kumaneko |
111 |
case 2: |
2151 |
kumaneko |
1052 |
if (!ccs_read_no_umount_policy(head)) |
2152 |
|
|
break; |
2153 |
|
|
head->read_var2 = NULL; |
2154 |
|
|
head->read_step = 3; |
2155 |
kumaneko |
111 |
case 3: |
2156 |
kumaneko |
1052 |
if (!ccs_read_chroot_policy(head)) |
2157 |
|
|
break; |
2158 |
|
|
head->read_var2 = NULL; |
2159 |
|
|
head->read_step = 4; |
2160 |
kumaneko |
111 |
case 4: |
2161 |
kumaneko |
1052 |
if (!ccs_read_pivot_root_policy(head)) |
2162 |
|
|
break; |
2163 |
|
|
head->read_var2 = NULL; |
2164 |
|
|
head->read_step = 5; |
2165 |
kumaneko |
141 |
case 5: |
2166 |
kumaneko |
1052 |
if (!ccs_read_reserved_port_policy(head)) |
2167 |
|
|
break; |
2168 |
kumaneko |
1006 |
head->read_eof = true; |
2169 |
kumaneko |
111 |
break; |
2170 |
|
|
default: |
2171 |
|
|
return -EINVAL; |
2172 |
|
|
} |
2173 |
|
|
} |
2174 |
|
|
return 0; |
2175 |
|
|
} |
2176 |
|
|
|
2177 |
|
|
#endif |
2178 |
|
|
|
2179 |
kumaneko |
1052 |
/* Profile loaded by policy loader? */ |
2180 |
kumaneko |
1006 |
static bool profile_loaded = false; |
2181 |
kumaneko |
325 |
|
2182 |
kumaneko |
1052 |
/* Path to the policy loader. The default is /sbin/ccs-init . */ |
2183 |
|
|
static const char *ccs_loader; |
2184 |
kumaneko |
111 |
|
2185 |
kumaneko |
1052 |
/** |
2186 |
|
|
* loader_setup - Specify the policy loader to use. |
2187 |
|
|
* |
2188 |
|
|
* @str: Path to the policy loader. |
2189 |
|
|
* |
2190 |
|
|
* Returns 0. |
2191 |
|
|
*/ |
2192 |
|
|
static int __init loader_setup(char *str) |
2193 |
kumaneko |
111 |
{ |
2194 |
|
|
ccs_loader = str; |
2195 |
|
|
return 0; |
2196 |
|
|
} |
2197 |
|
|
|
2198 |
kumaneko |
1052 |
__setup("CCS_loader=", loader_setup); |
2199 |
kumaneko |
111 |
|
2200 |
kumaneko |
1052 |
/** |
2201 |
|
|
* policy_loader_exists - Check whether /sbin/ccs-init exists. |
2202 |
|
|
* |
2203 |
|
|
* Returns true if /sbin/ccs-init exists, false otherwise. |
2204 |
|
|
*/ |
2205 |
|
|
static bool policy_loader_exists(void) |
2206 |
kumaneko |
111 |
{ |
2207 |
|
|
/* |
2208 |
kumaneko |
1052 |
* Don't activate MAC if the path given by 'CCS_loader=' option doesn't |
2209 |
|
|
* exist. If the initrd includes /sbin/init but real-root-dev has not |
2210 |
|
|
* mounted on / yet, activating MAC will block the system since |
2211 |
|
|
* policies are not loaded yet. |
2212 |
|
|
* Thus, let do_execve() call this function everytime. |
2213 |
kumaneko |
111 |
*/ |
2214 |
kumaneko |
1052 |
struct nameidata nd; |
2215 |
|
|
if (!ccs_loader) |
2216 |
|
|
ccs_loader = "/sbin/ccs-init"; |
2217 |
|
|
if (path_lookup(ccs_loader, lookup_flags, &nd)) { |
2218 |
|
|
printk(KERN_INFO "Not activating Mandatory Access Control now " |
2219 |
|
|
"since %s doesn't exist.\n", ccs_loader); |
2220 |
|
|
return false; |
2221 |
|
|
} |
2222 |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
2223 |
|
|
path_put(&nd.path); |
2224 |
|
|
#else |
2225 |
|
|
path_release(&nd); |
2226 |
|
|
#endif |
2227 |
|
|
return true; |
2228 |
|
|
} |
2229 |
|
|
|
2230 |
|
|
/** |
2231 |
|
|
* ccs_load_policy - Run external policy loader to load policy. |
2232 |
|
|
* |
2233 |
|
|
* @filename: The program about to start. |
2234 |
|
|
* |
2235 |
|
|
* This function checks whether @filename is /sbin/init , and if so |
2236 |
|
|
* invoke /sbin/ccs-init and wait for the termination of /sbin/ccs-init |
2237 |
|
|
* and then continues invocation of /sbin/init . |
2238 |
|
|
* /sbin/ccs-init reads policy files in /etc/ccs/ directory and |
2239 |
|
|
* writes to /proc/ccs/ interfaces. |
2240 |
|
|
* |
2241 |
|
|
* Returns nothing. |
2242 |
|
|
*/ |
2243 |
|
|
void ccs_load_policy(const char *filename) |
2244 |
|
|
{ |
2245 |
|
|
if (sbin_init_started) |
2246 |
|
|
return; |
2247 |
kumaneko |
111 |
/* |
2248 |
kumaneko |
1052 |
* Check filename is /sbin/init or /sbin/ccs-start . |
2249 |
|
|
* /sbin/ccs-start is a dummy filename in case where /sbin/init can't |
2250 |
|
|
* be passed. |
2251 |
|
|
* You can create /sbin/ccs-start by "ln -s /bin/true /sbin/ccs-start". |
2252 |
kumaneko |
111 |
*/ |
2253 |
kumaneko |
1052 |
if (strcmp(filename, "/sbin/init") && |
2254 |
|
|
strcmp(filename, "/sbin/ccs-start")) |
2255 |
|
|
return; |
2256 |
|
|
if (!policy_loader_exists()) |
2257 |
|
|
return; |
2258 |
kumaneko |
325 |
if (!profile_loaded) { |
2259 |
|
|
char *argv[2], *envp[3]; |
2260 |
kumaneko |
1052 |
printk(KERN_INFO "Calling %s to load policy. Please wait.\n", |
2261 |
|
|
ccs_loader); |
2262 |
kumaneko |
325 |
argv[0] = (char *) ccs_loader; |
2263 |
|
|
argv[1] = NULL; |
2264 |
|
|
envp[0] = "HOME=/"; |
2265 |
|
|
envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; |
2266 |
|
|
envp[2] = NULL; |
2267 |
kumaneko |
1052 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
2268 |
kumaneko |
325 |
call_usermodehelper(argv[0], argv, envp, 1); |
2269 |
|
|
#else |
2270 |
|
|
call_usermodehelper(argv[0], argv, envp); |
2271 |
|
|
#endif |
2272 |
|
|
while (!profile_loaded) { |
2273 |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
2274 |
|
|
schedule_timeout(HZ / 10); |
2275 |
|
|
} |
2276 |
|
|
} |
2277 |
kumaneko |
473 |
#ifdef CONFIG_SAKURA |
2278 |
kumaneko |
1052 |
printk(KERN_INFO "SAKURA: 1.6.0-pre 2008/03/24\n"); |
2279 |
kumaneko |
473 |
#endif |
2280 |
|
|
#ifdef CONFIG_TOMOYO |
2281 |
kumaneko |
1052 |
printk(KERN_INFO "TOMOYO: 1.6.0-pre 2008/03/24\n"); |
2282 |
kumaneko |
473 |
#endif |
2283 |
kumaneko |
1052 |
printk(KERN_INFO "Mandatory Access Control activated.\n"); |
2284 |
kumaneko |
1006 |
sbin_init_started = true; |
2285 |
kumaneko |
111 |
ccs_log_level = KERN_WARNING; |
2286 |
|
|
{ /* Check all profiles currently assigned to domains are defined. */ |
2287 |
|
|
struct domain_info *domain; |
2288 |
kumaneko |
722 |
list1_for_each_entry(domain, &domain_list, list) { |
2289 |
kumaneko |
111 |
const u8 profile = domain->profile; |
2290 |
kumaneko |
1052 |
if (profile_ptr[profile]) |
2291 |
|
|
continue; |
2292 |
|
|
panic("Profile %u (used by '%s') not defined.\n", |
2293 |
|
|
profile, domain->domainname->name); |
2294 |
kumaneko |
111 |
} |
2295 |
|
|
} |
2296 |
|
|
} |
2297 |
|
|
|
2298 |
kumaneko |
1052 |
/* Wait queue for query_list. */ |
2299 |
kumaneko |
111 |
static DECLARE_WAIT_QUEUE_HEAD(query_wait); |
2300 |
|
|
|
2301 |
kumaneko |
1052 |
/* Lock for manipurating query_list. */ |
2302 |
|
|
static DEFINE_SPINLOCK(query_lock); |
2303 |
kumaneko |
111 |
|
2304 |
kumaneko |
1052 |
/* Structure for query. */ |
2305 |
kumaneko |
214 |
struct query_entry { |
2306 |
kumaneko |
111 |
struct list_head list; |
2307 |
|
|
char *query; |
2308 |
|
|
int query_len; |
2309 |
|
|
unsigned int serial; |
2310 |
|
|
int timer; |
2311 |
|
|
int answer; |
2312 |
kumaneko |
214 |
}; |
2313 |
kumaneko |
111 |
|
2314 |
kumaneko |
1052 |
/* The list for "struct query_entry". */ |
2315 |
kumaneko |
111 |
static LIST_HEAD(query_list); |
2316 |
kumaneko |
1052 |
|
2317 |
|
|
/* Number of "struct file" referring /proc/ccs/query interface. */ |
2318 |
kumaneko |
111 |
static atomic_t queryd_watcher = ATOMIC_INIT(0); |
2319 |
|
|
|
2320 |
kumaneko |
1052 |
/** |
2321 |
|
|
* ccs_check_supervisor - Ask for the supervisor's decision. |
2322 |
|
|
* |
2323 |
|
|
* @fmt: The printf()'s format string, followed by parameters. |
2324 |
|
|
* |
2325 |
|
|
* Returns 0 if the supervisor decided to permit the access request which |
2326 |
|
|
* violated the policy in enforcing mode, -EPERM otherwise. |
2327 |
|
|
*/ |
2328 |
|
|
int ccs_check_supervisor(const char *fmt, ...) |
2329 |
kumaneko |
111 |
{ |
2330 |
|
|
va_list args; |
2331 |
|
|
int error = -EPERM; |
2332 |
|
|
int pos, len; |
2333 |
kumaneko |
1052 |
static unsigned int serial; |
2334 |
kumaneko |
214 |
struct query_entry *query_entry; |
2335 |
kumaneko |
1052 |
if (!ccs_check_flags(CCS_ALLOW_ENFORCE_GRACE) |
2336 |
|
|
|| !atomic_read(&queryd_watcher)) { |
2337 |
|
|
int i; |
2338 |
|
|
if (current->tomoyo_flags & CCS_DONT_SLEEP_ON_ENFORCE_ERROR) |
2339 |
|
|
return -EPERM; |
2340 |
|
|
for (i = 0; i < ccs_check_flags(CCS_SLEEP_PERIOD); i++) { |
2341 |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
2342 |
|
|
schedule_timeout(HZ / 10); |
2343 |
kumaneko |
708 |
} |
2344 |
|
|
return -EPERM; |
2345 |
|
|
} |
2346 |
kumaneko |
111 |
va_start(args, fmt); |
2347 |
|
|
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; |
2348 |
|
|
va_end(args); |
2349 |
kumaneko |
1052 |
query_entry = ccs_alloc(sizeof(*query_entry)); |
2350 |
|
|
if (!query_entry) |
2351 |
|
|
goto out; |
2352 |
|
|
query_entry->query = ccs_alloc(len); |
2353 |
|
|
if (!query_entry->query) |
2354 |
|
|
goto out; |
2355 |
kumaneko |
111 |
INIT_LIST_HEAD(&query_entry->list); |
2356 |
|
|
/***** CRITICAL SECTION START *****/ |
2357 |
|
|
spin_lock(&query_lock); |
2358 |
|
|
query_entry->serial = serial++; |
2359 |
|
|
spin_unlock(&query_lock); |
2360 |
|
|
/***** CRITICAL SECTION END *****/ |
2361 |
kumaneko |
1052 |
pos = snprintf(query_entry->query, len - 1, "Q%u\n", |
2362 |
|
|
query_entry->serial); |
2363 |
kumaneko |
111 |
va_start(args, fmt); |
2364 |
|
|
vsnprintf(query_entry->query + pos, len - 1 - pos, fmt, args); |
2365 |
|
|
query_entry->query_len = strlen(query_entry->query) + 1; |
2366 |
|
|
va_end(args); |
2367 |
|
|
/***** CRITICAL SECTION START *****/ |
2368 |
|
|
spin_lock(&query_lock); |
2369 |
|
|
list_add_tail(&query_entry->list, &query_list); |
2370 |
|
|
spin_unlock(&query_lock); |
2371 |
|
|
/***** CRITICAL SECTION END *****/ |
2372 |
kumaneko |
1052 |
ccs_update_counter(CCS_UPDATES_COUNTER_QUERY); |
2373 |
kumaneko |
111 |
/* Give 10 seconds for supervisor's opinion. */ |
2374 |
kumaneko |
1052 |
for (query_entry->timer = 0; atomic_read(&queryd_watcher) |
2375 |
|
|
&& ccs_check_flags(CCS_ALLOW_ENFORCE_GRACE) |
2376 |
|
|
&& query_entry->timer < 100; query_entry->timer++) { |
2377 |
kumaneko |
111 |
wake_up(&query_wait); |
2378 |
|
|
set_current_state(TASK_INTERRUPTIBLE); |
2379 |
|
|
schedule_timeout(HZ / 10); |
2380 |
kumaneko |
1052 |
if (query_entry->answer) |
2381 |
|
|
break; |
2382 |
kumaneko |
111 |
} |
2383 |
kumaneko |
1052 |
ccs_update_counter(CCS_UPDATES_COUNTER_QUERY); |
2384 |
kumaneko |
111 |
/***** CRITICAL SECTION START *****/ |
2385 |
|
|
spin_lock(&query_lock); |
2386 |
|
|
list_del(&query_entry->list); |
2387 |
|
|
spin_unlock(&query_lock); |
2388 |
|
|
/***** CRITICAL SECTION END *****/ |
2389 |
|
|
switch (query_entry->answer) { |
2390 |
|
|
case 1: |
2391 |
|
|
/* Granted by administrator. */ |
2392 |
|
|
error = 0; |
2393 |
|
|
break; |
2394 |
|
|
case 0: |
2395 |
|
|
/* Timed out. */ |
2396 |
|
|
break; |
2397 |
|
|
default: |
2398 |
|
|
/* Rejected by administrator. */ |
2399 |
|
|
break; |
2400 |
|
|
} |
2401 |
kumaneko |
1052 |
out: |
2402 |
|
|
if (query_entry) |
2403 |
|
|
ccs_free(query_entry->query); |
2404 |
kumaneko |
111 |
ccs_free(query_entry); |
2405 |
|
|
return error; |
2406 |
|
|
} |
2407 |
|
|
|
2408 |
kumaneko |
1052 |
/** |
2409 |
|
|
* poll_query - poll() for /proc/ccs/query . |
2410 |
|
|
* |
2411 |
|
|
* @file: Pointer to "struct file". |
2412 |
|
|
* @wait: Pointer to "poll_table". |
2413 |
|
|
* |
2414 |
|
|
* Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. |
2415 |
|
|
* |
2416 |
|
|
* Waits for access requests which violated policy in enforcing mode. |
2417 |
|
|
*/<
| |