1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) International Business Machines Corp., 2002-2004
4 * Copyright (C) Andreas Gruenbacher, 2001
5 * Copyright (C) Linus Torvalds, 1991, 1992
8 #include <linux/sched.h>
9 #include <linux/slab.h>
11 #include <linux/posix_acl_xattr.h>
12 #include "jfs_incore.h"
13 #include "jfs_txnmgr.h"
14 #include "jfs_xattr.h"
17 struct posix_acl *jfs_get_acl(struct inode *inode, int type, bool rcu)
19 struct posix_acl *acl;
25 return ERR_PTR(-ECHILD);
29 ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
31 case ACL_TYPE_DEFAULT:
32 ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
35 return ERR_PTR(-EINVAL);
38 size = __jfs_getxattr(inode, ea_name, NULL, 0);
41 value = kmalloc(size, GFP_KERNEL);
43 return ERR_PTR(-ENOMEM);
44 size = __jfs_getxattr(inode, ea_name, value, size);
53 acl = posix_acl_from_xattr(&init_user_ns, value, size);
59 static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
60 struct posix_acl *acl)
69 ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
71 case ACL_TYPE_DEFAULT:
72 ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
79 size = posix_acl_xattr_size(acl->a_count);
80 value = kmalloc(size, GFP_KERNEL);
83 rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
87 rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
92 set_cached_acl(inode, type, acl);
97 int jfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
98 struct posix_acl *acl, int type)
103 umode_t mode = inode->i_mode;
105 tid = txBegin(inode->i_sb, 0);
106 mutex_lock(&JFS_IP(inode)->commit_mutex);
107 if (type == ACL_TYPE_ACCESS && acl) {
108 rc = posix_acl_update_mode(&init_user_ns, inode, &mode, &acl);
111 if (mode != inode->i_mode)
114 rc = __jfs_set_acl(tid, inode, type, acl);
117 inode->i_mode = mode;
118 inode->i_ctime = current_time(inode);
119 mark_inode_dirty(inode);
121 rc = txCommit(tid, 1, &inode, 0);
125 mutex_unlock(&JFS_IP(inode)->commit_mutex);
129 int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
131 struct posix_acl *default_acl, *acl;
134 rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
139 rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
140 posix_acl_release(default_acl);
142 inode->i_default_acl = NULL;
147 rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
148 posix_acl_release(acl);
153 JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |