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8#include "protocol.h"
9#include "orangefs-kernel.h"
10#include "orangefs-bufmap.h"
11#include <linux/posix_acl_xattr.h>
12
13struct posix_acl *orangefs_get_acl(struct inode *inode, int type)
14{
15 struct posix_acl *acl;
16 int ret;
17 char *key = NULL, *value = NULL;
18
19 switch (type) {
20 case ACL_TYPE_ACCESS:
21 key = XATTR_NAME_POSIX_ACL_ACCESS;
22 break;
23 case ACL_TYPE_DEFAULT:
24 key = XATTR_NAME_POSIX_ACL_DEFAULT;
25 break;
26 default:
27 gossip_err("orangefs_get_acl: bogus value of type %d\n", type);
28 return ERR_PTR(-EINVAL);
29 }
30
31
32
33
34
35
36
37 value = kmalloc(ORANGEFS_MAX_XATTR_VALUELEN, GFP_KERNEL);
38 if (!value)
39 return ERR_PTR(-ENOMEM);
40
41 gossip_debug(GOSSIP_ACL_DEBUG,
42 "inode %pU, key %s, type %d\n",
43 get_khandle_from_ino(inode),
44 key,
45 type);
46 ret = orangefs_inode_getxattr(inode, key, value,
47 ORANGEFS_MAX_XATTR_VALUELEN);
48
49 if (ret > 0) {
50 acl = posix_acl_from_xattr(&init_user_ns, value, ret);
51 } else if (ret == -ENODATA || ret == -ENOSYS) {
52 acl = NULL;
53 } else {
54 gossip_err("inode %pU retrieving acl's failed with error %d\n",
55 get_khandle_from_ino(inode),
56 ret);
57 acl = ERR_PTR(ret);
58 }
59
60 kfree(value);
61 return acl;
62}
63
64static int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl,
65 int type)
66{
67 int error = 0;
68 void *value = NULL;
69 size_t size = 0;
70 const char *name = NULL;
71
72 switch (type) {
73 case ACL_TYPE_ACCESS:
74 name = XATTR_NAME_POSIX_ACL_ACCESS;
75 break;
76 case ACL_TYPE_DEFAULT:
77 name = XATTR_NAME_POSIX_ACL_DEFAULT;
78 break;
79 default:
80 gossip_err("%s: invalid type %d!\n", __func__, type);
81 return -EINVAL;
82 }
83
84 gossip_debug(GOSSIP_ACL_DEBUG,
85 "%s: inode %pU, key %s type %d\n",
86 __func__, get_khandle_from_ino(inode),
87 name,
88 type);
89
90 if (acl) {
91 size = posix_acl_xattr_size(acl->a_count);
92 value = kmalloc(size, GFP_KERNEL);
93 if (!value)
94 return -ENOMEM;
95
96 error = posix_acl_to_xattr(&init_user_ns, acl, value, size);
97 if (error < 0)
98 goto out;
99 }
100
101 gossip_debug(GOSSIP_ACL_DEBUG,
102 "%s: name %s, value %p, size %zd, acl %p\n",
103 __func__, name, value, size, acl);
104
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108
109
110 error = orangefs_inode_setxattr(inode, name, value, size, 0);
111
112out:
113 kfree(value);
114 if (!error)
115 set_cached_acl(inode, type, acl);
116 return error;
117}
118
119int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
120{
121 int error;
122 struct iattr iattr;
123 int rc;
124
125 memset(&iattr, 0, sizeof iattr);
126
127 if (type == ACL_TYPE_ACCESS && acl) {
128
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133
134
135 error = posix_acl_update_mode(inode, &iattr.ia_mode, &acl);
136 if (error) {
137 gossip_err("%s: posix_acl_update_mode err: %d\n",
138 __func__,
139 error);
140 return error;
141 }
142
143 if (inode->i_mode != iattr.ia_mode)
144 iattr.ia_valid = ATTR_MODE;
145
146 }
147
148 rc = __orangefs_set_acl(inode, acl, type);
149
150 if (!rc && (iattr.ia_valid == ATTR_MODE))
151 rc = __orangefs_setattr(inode, &iattr);
152
153 return rc;
154}
155
156int orangefs_init_acl(struct inode *inode, struct inode *dir)
157{
158 struct posix_acl *default_acl, *acl;
159 umode_t mode = inode->i_mode;
160 struct iattr iattr;
161 int error = 0;
162
163 error = posix_acl_create(dir, &mode, &default_acl, &acl);
164 if (error)
165 return error;
166
167 if (default_acl) {
168 error = __orangefs_set_acl(inode, default_acl,
169 ACL_TYPE_DEFAULT);
170 posix_acl_release(default_acl);
171 } else {
172 inode->i_default_acl = NULL;
173 }
174
175 if (acl) {
176 if (!error)
177 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
178 posix_acl_release(acl);
179 } else {
180 inode->i_acl = NULL;
181 }
182
183
184 if (mode != inode->i_mode) {
185 memset(&iattr, 0, sizeof iattr);
186 inode->i_mode = mode;
187 iattr.ia_mode = mode;
188 iattr.ia_valid |= ATTR_MODE;
189 __orangefs_setattr(inode, &iattr);
190 }
191
192 return error;
193}
194