Release 4.14 fs/jfs/acl.c

/*
 *   Copyright (C) International Business Machines  Corp., 2002-2004
 *   Copyright (C) Andreas Gruenbacher, 2001
 *   Copyright (C) Linus Torvalds, 1991, 1992
 *
 *   This program is free software;  you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/posix_acl_xattr.h>
#include "jfs_incore.h"
#include "jfs_txnmgr.h"
#include "jfs_xattr.h"
#include "jfs_acl.h"



struct posix_acl *jfs_get_acl(struct inode *inode, int type)
{
	struct posix_acl *acl;
	char *ea_name;
	int size;
	char *value = NULL;

	switch(type) {
		case ACL_TYPE_ACCESS:
			ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
			break;
		case ACL_TYPE_DEFAULT:
			ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
			break;
		default:
			return ERR_PTR(-EINVAL);
	}

	size = __jfs_getxattr(inode, ea_name, NULL, 0);

	if (size > 0) {
		value = kmalloc(size, GFP_KERNEL);
		if (!value)
			return ERR_PTR(-ENOMEM);
		size = __jfs_getxattr(inode, ea_name, value, size);
	}

	if (size < 0) {
		if (size == -ENODATA)
			acl = NULL;
		else
			acl = ERR_PTR(size);
	} else {
		acl = posix_acl_from_xattr(&init_user_ns, value, size);
	}
	kfree(value);
	return acl;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Kleikamp
157
93.45%
1
25.00%
Al Viro
6
3.57%
1
25.00%
Eric W. Biedermann
3
1.79%
1
25.00%
Andreas Gruenbacher
2
1.19%
1
25.00%
Total
168
100.00%
4
100.00%



static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
		       struct posix_acl *acl)
{
	char *ea_name;
	int rc;
	int size = 0;
	char *value = NULL;

	switch (type) {
	case ACL_TYPE_ACCESS:
		ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
		break;
	case ACL_TYPE_DEFAULT:
		ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
		break;
	default:
		return -EINVAL;
	}

	if (acl) {
		size = posix_acl_xattr_size(acl->a_count);
		value = kmalloc(size, GFP_KERNEL);
		if (!value)
			return -ENOMEM;
		rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
		if (rc < 0)
			goto out;
	}
	rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
out:
	kfree(value);

	if (!rc)
		set_cached_acl(inode, type, acl);

	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Kleikamp
145
88.41%
3
37.50%
Christoph Hellwig
9
5.49%
2
25.00%
Al Viro
5
3.05%
1
12.50%
Eric W. Biedermann
3
1.83%
1
12.50%
Andreas Gruenbacher
2
1.22%
1
12.50%
Total
164
100.00%
8
100.00%



int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
	int rc;
	tid_t tid;
	int update_mode = 0;
	umode_t mode = inode->i_mode;

	tid = txBegin(inode->i_sb, 0);
	mutex_lock(&JFS_IP(inode)->commit_mutex);
	if (type == ACL_TYPE_ACCESS && acl) {
		rc = posix_acl_update_mode(inode, &mode, &acl);
		if (rc)
			goto end_tx;
		update_mode = 1;
	}
	rc = __jfs_set_acl(tid, inode, type, acl);
	if (!rc) {
		if (update_mode) {
			inode->i_mode = mode;
			inode->i_ctime = current_time(inode);
			mark_inode_dirty(inode);
		}
		rc = txCommit(tid, 1, &inode, 0);
	}
end_tx:
	txEnd(tid);
	mutex_unlock(&JFS_IP(inode)->commit_mutex);
	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Kleikamp
63
36.42%
3
37.50%
Ernesto A. Fernández
43
24.86%
1
12.50%
Jan Kara
33
19.08%
1
12.50%
Christoph Hellwig
32
18.50%
1
12.50%
Al Viro
2
1.16%
2
25.00%
Total
173
100.00%
8
100.00%



int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
{
	struct posix_acl *default_acl, *acl;
	int rc = 0;

	rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
	if (rc)
		return rc;

	if (default_acl) {
		rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
		posix_acl_release(default_acl);
	}

	if (acl) {
		if (!rc)
			rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
		posix_acl_release(acl);
	}

	JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
			       inode->i_mode;

	return rc;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Kleikamp
67
50.00%
2
50.00%
Christoph Hellwig
63
47.01%
1
25.00%
Al Viro
4
2.99%
1
25.00%
Total
134
100.00%
4
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Kleikamp
451
67.92%
5
31.25%
Christoph Hellwig
107
16.11%
2
12.50%
Ernesto A. Fernández
43
6.48%
1
6.25%
Jan Kara
33
4.97%
1
6.25%
Al Viro
17
2.56%
4
25.00%
Eric W. Biedermann
6
0.90%
1
6.25%
Andreas Gruenbacher
4
0.60%
1
6.25%
Tejun Heo
3
0.45%
1
6.25%
Total
664
100.00%
16
100.00%
Directory: fs/jfs

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