1 // SPDX-License-Identifier: GPL-2.0
3 * (C) 2001 Clemson University and The University of Chicago
5 * See COPYING in top-level directory.
9 #include "orangefs-kernel.h"
10 #include "orangefs-bufmap.h"
11 #include <linux/posix_acl_xattr.h>
13 struct posix_acl *orangefs_get_acl(struct inode *inode, int type)
15 struct posix_acl *acl;
17 char *key = NULL, *value = NULL;
21 key = XATTR_NAME_POSIX_ACL_ACCESS;
23 case ACL_TYPE_DEFAULT:
24 key = XATTR_NAME_POSIX_ACL_DEFAULT;
27 gossip_err("orangefs_get_acl: bogus value of type %d\n", type);
28 return ERR_PTR(-EINVAL);
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.
37 value = kmalloc(ORANGEFS_MAX_XATTR_VALUELEN, GFP_KERNEL);
39 return ERR_PTR(-ENOMEM);
41 gossip_debug(GOSSIP_ACL_DEBUG,
42 "inode %pU, key %s, type %d\n",
43 get_khandle_from_ino(inode),
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 */
50 acl = posix_acl_from_xattr(&init_user_ns, value, ret);
51 } else if (ret == -ENODATA || ret == -ENOSYS) {
54 gossip_err("inode %pU retrieving acl's failed with error %d\n",
55 get_khandle_from_ino(inode),
59 /* kfree(NULL) is safe, so don't worry if value ever got used */
64 static int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl,
70 const char *name = NULL;
74 name = XATTR_NAME_POSIX_ACL_ACCESS;
76 case ACL_TYPE_DEFAULT:
77 name = XATTR_NAME_POSIX_ACL_DEFAULT;
80 gossip_err("%s: invalid type %d!\n", __func__, type);
84 gossip_debug(GOSSIP_ACL_DEBUG,
85 "%s: inode %pU, key %s type %d\n",
86 __func__, get_khandle_from_ino(inode),
91 size = posix_acl_xattr_size(acl->a_count);
92 value = kmalloc(size, GFP_KERNEL);
96 error = posix_acl_to_xattr(&init_user_ns, acl, value, size);
101 gossip_debug(GOSSIP_ACL_DEBUG,
102 "%s: name %s, value %p, size %zd, acl %p\n",
103 __func__, name, value, size, acl);
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.
110 error = orangefs_inode_setxattr(inode, name, value, size, 0);
115 set_cached_acl(inode, type, acl);
119 int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
125 memset(&iattr, 0, sizeof iattr);
127 if (type == ACL_TYPE_ACCESS && acl) {
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...
135 error = posix_acl_update_mode(inode, &iattr.ia_mode, &acl);
137 gossip_err("%s: posix_acl_update_mode err: %d\n",
143 if (inode->i_mode != iattr.ia_mode)
144 iattr.ia_valid = ATTR_MODE;
148 rc = __orangefs_set_acl(inode, acl, type);
150 if (!rc && (iattr.ia_valid == ATTR_MODE))
151 rc = __orangefs_setattr(inode, &iattr);
156 int orangefs_init_acl(struct inode *inode, struct inode *dir)
158 struct posix_acl *default_acl, *acl;
159 umode_t mode = inode->i_mode;
163 error = posix_acl_create(dir, &mode, &default_acl, &acl);
168 error = __orangefs_set_acl(inode, default_acl,
170 posix_acl_release(default_acl);
172 inode->i_default_acl = NULL;
177 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
178 posix_acl_release(acl);
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);