1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*/
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/xattr.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
#include <asm/uaccess.h>
#include "gfs2.h"
#include "incore.h"
#include "acl.h"
#include "eaops.h"
#include "eattr.h"
#include "util.h"
/**
* gfs2_ea_name2type - get the type of the ea, and truncate type from the name
* @namep: ea name, possibly with type appended
*
* Returns: GFS2_EATYPE_XXX
*/
unsigned int gfs2_ea_name2type(const char *name, const char **truncated_name)
{
unsigned int type;
if (strncmp(name, "system.", 7) == 0) {
type = GFS2_EATYPE_SYS;
if (truncated_name)
*truncated_name = name + sizeof("system.") - 1;
} else if (strncmp(name, "user.", 5) == 0) {
type = GFS2_EATYPE_USR;
if (truncated_name)
*truncated_name = name + sizeof("user.") - 1;
} else if (strncmp(name, "security.", 9) == 0) {
type = GFS2_EATYPE_SECURITY;
if (truncated_name)
*truncated_name = name + sizeof("security.") - 1;
} else {
type = GFS2_EATYPE_UNUSED;
if (truncated_name)
*truncated_name = NULL;
}
return type;
}
static int user_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
int error = permission(inode, MAY_READ, NULL);
if (error)
return error;
return gfs2_ea_get_i(ip, er);
}
static int user_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
if (S_ISREG(inode->i_mode) ||
(S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
int error = permission(inode, MAY_WRITE, NULL);
if (error)
return error;
} else
return -EPERM;
return gfs2_ea_set_i(ip, er);
}
static int user_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
if (S_ISREG(inode->i_mode) ||
(S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
int error = permission(inode, MAY_WRITE, NULL);
if (error)
return error;
} else
return -EPERM;
return gfs2_ea_remove_i(ip, er);
}
static int system_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
if (!GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) &&
!GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len) &&
!capable(CAP_SYS_ADMIN))
return -EPERM;
if (GFS2_SB(&ip->i_inode)->sd_args.ar_posix_acl == 0 &&
(GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) ||
GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)))
return -EOPNOTSUPP;
return gfs2_ea_get_i(ip, er);
}
static int system_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
int remove = 0;
int error;
if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
if (!(er->er_flags & GFS2_ERF_MODE)) {
er->er_mode = ip->i_inode.i_mode;
er->er_flags |= GFS2_ERF_MODE;
}
error = gfs2_acl_validate_set(ip, 1, er,
&remove, &er->er_mode);
if (error)
return error;
error = gfs2_ea_set_i(ip, er);
if (error)
return error;
if (remove)
gfs2_ea_remove_i(ip, er);
return 0;
} else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
error = gfs2_acl_validate_set(ip, 0, er,
&remove, NULL);
if (error)
return error;
if (!remove)
error = gfs2_ea_set_i(ip, er);
else {
error = gfs2_ea_remove_i(ip, er);
if (error == -ENODATA)
error = 0;
}
return error;
}
return -EPERM;
}
static int system_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
int error = gfs2_acl_validate_remove(ip, 1);
if (error)
return error;
} else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
int error = gfs2_acl_validate_remove(ip, 0);
if (error)
return error;
} else
return -EPERM;
return gfs2_ea_remove_i(ip, er);
}
static int security_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
int error = permission(inode, MAY_READ, NULL);
if (error)
return error;
return gfs2_ea_get_i(ip, er);
}
static int security_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
int error = permission(inode, MAY_WRITE, NULL);
if (error)
return error;
return gfs2_ea_set_i(ip, er);
}
static int security_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
int error = permission(inode, MAY_WRITE, NULL);
if (error)
return error;
return gfs2_ea_remove_i(ip, er);
}
static struct gfs2_eattr_operations gfs2_user_eaops = {
.eo_get = user_eo_get,
.eo_set = user_eo_set,
.eo_remove = user_eo_remove,
.eo_name = "user",
};
struct gfs2_eattr_operations gfs2_system_eaops = {
.eo_get = system_eo_get,
.eo_set = system_eo_set,
.eo_remove = system_eo_remove,
.eo_name = "system",
};
static struct gfs2_eattr_operations gfs2_security_eaops = {
.eo_get = security_eo_get,
.eo_set = security_eo_set,
.eo_remove = security_eo_remove,
.eo_name = "security",
};
struct gfs2_eattr_operations *gfs2_ea_ops[] = {
NULL,
&gfs2_user_eaops,
&gfs2_system_eaops,
&gfs2_security_eaops,
};
|
