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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) 2001 Clemson University and The University of Chicago
4 *
5 * See COPYING in top-level directory.
6 */
7
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, bool rcu)
14{
15 struct posix_acl *acl;
16 int ret;
17 char *key = NULL, *value = NULL;
18
19 if (rcu)
20 return ERR_PTR(-ECHILD);
21
22 switch (type) {
23 case ACL_TYPE_ACCESS:
24 key = XATTR_NAME_POSIX_ACL_ACCESS;
25 break;
26 case ACL_TYPE_DEFAULT:
27 key = XATTR_NAME_POSIX_ACL_DEFAULT;
28 break;
29 default:
30 gossip_err("orangefs_get_acl: bogus value of type %d\n", type);
31 return ERR_PTR(-EINVAL);
32 }
33 /*
34 * Rather than incurring a network call just to determine the exact
35 * length of the attribute, I just allocate a max length to save on
36 * the network call. Conceivably, we could pass NULL to
37 * orangefs_inode_getxattr() to probe the length of the value, but
38 * I don't do that for now.
39 */
40 value = kmalloc(ORANGEFS_MAX_XATTR_VALUELEN, GFP_KERNEL);
41 if (!value)
42 return ERR_PTR(-ENOMEM);
43
44 gossip_debug(GOSSIP_ACL_DEBUG,
45 "inode %pU, key %s, type %d\n",
46 get_khandle_from_ino(inode),
47 key,
48 type);
49 ret = orangefs_inode_getxattr(inode, key, value,
50 ORANGEFS_MAX_XATTR_VALUELEN);
51 /* if the key exists, convert it to an in-memory rep */
52 if (ret > 0) {
53 acl = posix_acl_from_xattr(&init_user_ns, value, ret);
54 } else if (ret == -ENODATA || ret == -ENOSYS) {
55 acl = NULL;
56 } else {
57 gossip_err("inode %pU retrieving acl's failed with error %d\n",
58 get_khandle_from_ino(inode),
59 ret);
60 acl = ERR_PTR(ret);
61 }
62 /* kfree(NULL) is safe, so don't worry if value ever got used */
63 kfree(value);
64 return acl;
65}
66
67int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
68{
69 int error = 0;
70 void *value = NULL;
71 size_t size = 0;
72 const char *name = NULL;
73
74 switch (type) {
75 case ACL_TYPE_ACCESS:
76 name = XATTR_NAME_POSIX_ACL_ACCESS;
77 break;
78 case ACL_TYPE_DEFAULT:
79 name = XATTR_NAME_POSIX_ACL_DEFAULT;
80 break;
81 default:
82 gossip_err("%s: invalid type %d!\n", __func__, type);
83 return -EINVAL;
84 }
85
86 gossip_debug(GOSSIP_ACL_DEBUG,
87 "%s: inode %pU, key %s type %d\n",
88 __func__, get_khandle_from_ino(inode),
89 name,
90 type);
91
92 if (acl) {
93 size = posix_acl_xattr_size(acl->a_count);
94 value = kmalloc(size, GFP_KERNEL);
95 if (!value)
96 return -ENOMEM;
97
98 error = posix_acl_to_xattr(&init_user_ns, acl, value, size);
99 if (error < 0)
100 goto out;
101 }
102
103 gossip_debug(GOSSIP_ACL_DEBUG,
104 "%s: name %s, value %p, size %zd, acl %p\n",
105 __func__, name, value, size, acl);
106 /*
107 * Go ahead and set the extended attribute now. NOTE: Suppose acl
108 * was NULL, then value will be NULL and size will be 0 and that
109 * will xlate to a removexattr. However, we don't want removexattr
110 * complain if attributes does not exist.
111 */
112 error = orangefs_inode_setxattr(inode, name, value, size, 0);
113
114out:
115 kfree(value);
116 if (!error)
117 set_cached_acl(inode, type, acl);
118 return error;
119}
120
121int orangefs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
122 struct posix_acl *acl, int type)
123{
124 int error;
125 struct iattr iattr;
126 int rc;
127 struct inode *inode = d_inode(dentry);
128
129 memset(&iattr, 0, sizeof iattr);
130
131 if (type == ACL_TYPE_ACCESS && acl) {
132 /*
133 * posix_acl_update_mode checks to see if the permissions
134 * described by the ACL can be encoded into the
135 * object's mode. If so, it sets "acl" to NULL
136 * and "mode" to the new desired value. It is up to
137 * us to propagate the new mode back to the server...
138 */
139 error = posix_acl_update_mode(&nop_mnt_idmap, inode,
140 &iattr.ia_mode, &acl);
141 if (error) {
142 gossip_err("%s: posix_acl_update_mode err: %d\n",
143 __func__,
144 error);
145 return error;
146 }
147
148 if (inode->i_mode != iattr.ia_mode)
149 iattr.ia_valid = ATTR_MODE;
150
151 }
152
153 rc = __orangefs_set_acl(inode, acl, type);
154
155 if (!rc && (iattr.ia_valid == ATTR_MODE))
156 rc = __orangefs_setattr_mode(dentry, &iattr);
157
158 return rc;
159}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) 2001 Clemson University and The University of Chicago
4 *
5 * See COPYING in top-level directory.
6 */
7
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 * Rather than incurring a network call just to determine the exact
32 * length of the attribute, I just allocate a max length to save on
33 * the network call. Conceivably, we could pass NULL to
34 * orangefs_inode_getxattr() to probe the length of the value, but
35 * I don't do that for now.
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 /* if the key exists, convert it to an in-memory rep */
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 /* kfree(NULL) is safe, so don't worry if value ever got used */
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 /*
105 * Go ahead and set the extended attribute now. NOTE: Suppose acl
106 * was NULL, then value will be NULL and size will be 0 and that
107 * will xlate to a removexattr. However, we don't want removexattr
108 * complain if attributes does not exist.
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 /*
129 * posix_acl_update_mode checks to see if the permissions
130 * described by the ACL can be encoded into the
131 * object's mode. If so, it sets "acl" to NULL
132 * and "mode" to the new desired value. It is up to
133 * us to propagate the new mode back to the server...
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 /* If mode of the inode was changed, then do a forcible ->setattr */
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}