Linux Audio

Check our new training course

Yocto distribution development and maintenance

Need a Yocto distribution for your embedded project?
Loading...
v6.9.4
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *   Copyright (C) International Business Machines  Corp., 2002-2004
  4 *   Copyright (C) Andreas Gruenbacher, 2001
  5 *   Copyright (C) Linus Torvalds, 1991, 1992
  6 */
  7
  8#include <linux/sched.h>
  9#include <linux/slab.h>
 10#include <linux/fs.h>
 11#include <linux/posix_acl_xattr.h>
 12#include "jfs_incore.h"
 13#include "jfs_txnmgr.h"
 14#include "jfs_xattr.h"
 15#include "jfs_acl.h"
 16
 17struct posix_acl *jfs_get_acl(struct inode *inode, int type, bool rcu)
 18{
 19	struct posix_acl *acl;
 20	char *ea_name;
 21	int size;
 22	char *value = NULL;
 23
 24	if (rcu)
 25		return ERR_PTR(-ECHILD);
 26
 27	switch(type) {
 28		case ACL_TYPE_ACCESS:
 29			ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
 30			break;
 31		case ACL_TYPE_DEFAULT:
 32			ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
 33			break;
 34		default:
 35			return ERR_PTR(-EINVAL);
 36	}
 37
 38	size = __jfs_getxattr(inode, ea_name, NULL, 0);
 39
 40	if (size > 0) {
 41		value = kmalloc(size, GFP_KERNEL);
 42		if (!value)
 43			return ERR_PTR(-ENOMEM);
 44		size = __jfs_getxattr(inode, ea_name, value, size);
 45	}
 46
 47	if (size < 0) {
 48		if (size == -ENODATA)
 49			acl = NULL;
 50		else
 51			acl = ERR_PTR(size);
 52	} else {
 53		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 54	}
 55	kfree(value);
 56	return acl;
 57}
 58
 59static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
 60		       struct posix_acl *acl)
 61{
 62	char *ea_name;
 63	int rc;
 64	int size = 0;
 65	char *value = NULL;
 66
 67	switch (type) {
 68	case ACL_TYPE_ACCESS:
 69		ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
 70		break;
 71	case ACL_TYPE_DEFAULT:
 72		ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
 73		break;
 74	default:
 75		return -EINVAL;
 76	}
 77
 78	if (acl) {
 79		size = posix_acl_xattr_size(acl->a_count);
 80		value = kmalloc(size, GFP_KERNEL);
 81		if (!value)
 82			return -ENOMEM;
 83		rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
 84		if (rc < 0)
 85			goto out;
 86	}
 87	rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
 88out:
 89	kfree(value);
 90
 91	if (!rc)
 92		set_cached_acl(inode, type, acl);
 93
 94	return rc;
 95}
 96
 97int jfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 98		struct posix_acl *acl, int type)
 99{
100	int rc;
101	tid_t tid;
102	int update_mode = 0;
103	struct inode *inode = d_inode(dentry);
104	umode_t mode = inode->i_mode;
105
106	tid = txBegin(inode->i_sb, 0);
107	mutex_lock(&JFS_IP(inode)->commit_mutex);
108	if (type == ACL_TYPE_ACCESS && acl) {
109		rc = posix_acl_update_mode(&nop_mnt_idmap, inode, &mode, &acl);
110		if (rc)
111			goto end_tx;
112		if (mode != inode->i_mode)
113			update_mode = 1;
114	}
115	rc = __jfs_set_acl(tid, inode, type, acl);
116	if (!rc) {
117		if (update_mode) {
118			inode->i_mode = mode;
119			inode_set_ctime_current(inode);
120			mark_inode_dirty(inode);
121		}
122		rc = txCommit(tid, 1, &inode, 0);
123	}
124end_tx:
125	txEnd(tid);
126	mutex_unlock(&JFS_IP(inode)->commit_mutex);
127	return rc;
128}
129
130int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
131{
132	struct posix_acl *default_acl, *acl;
133	int rc = 0;
134
135	rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
136	if (rc)
137		return rc;
138
139	if (default_acl) {
140		rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
141		posix_acl_release(default_acl);
142	} else {
143		inode->i_default_acl = NULL;
144	}
145
146	if (acl) {
147		if (!rc)
148			rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
149		posix_acl_release(acl);
150	} else {
151		inode->i_acl = NULL;
152	}
153
154	JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
155			       inode->i_mode;
156
157	return rc;
158}
v6.13.7
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *   Copyright (C) International Business Machines  Corp., 2002-2004
  4 *   Copyright (C) Andreas Gruenbacher, 2001
  5 *   Copyright (C) Linus Torvalds, 1991, 1992
  6 */
  7
  8#include <linux/sched.h>
  9#include <linux/slab.h>
 10#include <linux/fs.h>
 11#include <linux/posix_acl_xattr.h>
 12#include "jfs_incore.h"
 13#include "jfs_txnmgr.h"
 14#include "jfs_xattr.h"
 15#include "jfs_acl.h"
 16
 17struct posix_acl *jfs_get_acl(struct inode *inode, int type, bool rcu)
 18{
 19	struct posix_acl *acl;
 20	char *ea_name;
 21	int size;
 22	char *value = NULL;
 23
 24	if (rcu)
 25		return ERR_PTR(-ECHILD);
 26
 27	switch(type) {
 28		case ACL_TYPE_ACCESS:
 29			ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
 30			break;
 31		case ACL_TYPE_DEFAULT:
 32			ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
 33			break;
 34		default:
 35			return ERR_PTR(-EINVAL);
 36	}
 37
 38	size = __jfs_getxattr(inode, ea_name, NULL, 0);
 39
 40	if (size > 0) {
 41		value = kmalloc(size, GFP_KERNEL);
 42		if (!value)
 43			return ERR_PTR(-ENOMEM);
 44		size = __jfs_getxattr(inode, ea_name, value, size);
 45	}
 46
 47	if (size < 0) {
 48		if (size == -ENODATA)
 49			acl = NULL;
 50		else
 51			acl = ERR_PTR(size);
 52	} else {
 53		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 54	}
 55	kfree(value);
 56	return acl;
 57}
 58
 59static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
 60		       struct posix_acl *acl)
 61{
 62	char *ea_name;
 63	int rc;
 64	int size = 0;
 65	char *value = NULL;
 66
 67	switch (type) {
 68	case ACL_TYPE_ACCESS:
 69		ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
 70		break;
 71	case ACL_TYPE_DEFAULT:
 72		ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
 73		break;
 74	default:
 75		return -EINVAL;
 76	}
 77
 78	if (acl) {
 79		size = posix_acl_xattr_size(acl->a_count);
 80		value = kmalloc(size, GFP_KERNEL);
 81		if (!value)
 82			return -ENOMEM;
 83		rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
 84		if (rc < 0)
 85			goto out;
 86	}
 87	rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
 88out:
 89	kfree(value);
 90
 91	if (!rc)
 92		set_cached_acl(inode, type, acl);
 93
 94	return rc;
 95}
 96
 97int jfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 98		struct posix_acl *acl, int type)
 99{
100	int rc;
101	tid_t tid;
102	int update_mode = 0;
103	struct inode *inode = d_inode(dentry);
104	umode_t mode = inode->i_mode;
105
106	tid = txBegin(inode->i_sb, 0);
107	mutex_lock(&JFS_IP(inode)->commit_mutex);
108	if (type == ACL_TYPE_ACCESS && acl) {
109		rc = posix_acl_update_mode(&nop_mnt_idmap, inode, &mode, &acl);
110		if (rc)
111			goto end_tx;
112		if (mode != inode->i_mode)
113			update_mode = 1;
114	}
115	rc = __jfs_set_acl(tid, inode, type, acl);
116	if (!rc) {
117		if (update_mode) {
118			inode->i_mode = mode;
119			inode_set_ctime_current(inode);
120			mark_inode_dirty(inode);
121		}
122		rc = txCommit(tid, 1, &inode, 0);
123	}
124end_tx:
125	txEnd(tid);
126	mutex_unlock(&JFS_IP(inode)->commit_mutex);
127	return rc;
128}
129
130int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
131{
132	struct posix_acl *default_acl, *acl;
133	int rc = 0;
134
135	rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
136	if (rc)
137		return rc;
138
139	if (default_acl) {
140		rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
141		posix_acl_release(default_acl);
142	} else {
143		inode->i_default_acl = NULL;
144	}
145
146	if (acl) {
147		if (!rc)
148			rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
149		posix_acl_release(acl);
150	} else {
151		inode->i_acl = NULL;
152	}
153
154	JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
155			       inode->i_mode;
156
157	return rc;
158}