/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/xattr.h>
#include <linux/posix_acl.h>
#include <linux/posix_acl_xattr.h>
#include <linux/gfs2_ondisk.h>

#include "gfs2.h"
#include "incore.h"
#include "acl.h"
#include "xattr.h"
#include "glock.h"
#include "inode.h"
#include "meta_io.h"
#include "rgrp.h"
#include "trans.h"
#include "util.h"

static const char *gfs2_acl_name(int type)
{
	switch (type) {
	case ACL_TYPE_ACCESS:
		return XATTR_POSIX_ACL_ACCESS;
	case ACL_TYPE_DEFAULT:
		return XATTR_POSIX_ACL_DEFAULT;
	}
	return NULL;
}

static struct posix_acl *__gfs2_get_acl(struct inode *inode, int type)
{
	struct gfs2_inode *ip = GFS2_I(inode);
	struct posix_acl *acl;
	const char *name;
	char *data;
	int len;

	if (!ip->i_eattr)
		return NULL;

	name = gfs2_acl_name(type);
	len = gfs2_xattr_acl_get(ip, name, &data);
	if (len <= 0)
		return ERR_PTR(len);
	acl = posix_acl_from_xattr(&init_user_ns, data, len);
	kfree(data);
	return acl;
}

struct posix_acl *gfs2_get_acl(struct inode *inode, int type)
{
	struct gfs2_inode *ip = GFS2_I(inode);
	struct gfs2_holder gh;
	bool need_unlock = false;
	struct posix_acl *acl;

	if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
		int ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
					     LM_FLAG_ANY, &gh);
		if (ret)
			return ERR_PTR(ret);
		need_unlock = true;
	}
	acl = __gfs2_get_acl(inode, type);
	if (need_unlock)
		gfs2_glock_dq_uninit(&gh);
	return acl;
}

int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
	int error;
	int len;
	char *data;
	const char *name = gfs2_acl_name(type);

	if (acl && acl->a_count > GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode)))
		return -E2BIG;

	if (type == ACL_TYPE_ACCESS) {
		umode_t mode = inode->i_mode;

		error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
		if (error)
			return error;
		if (mode != inode->i_mode)
			mark_inode_dirty(inode);
	}

	if (acl) {
		len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0);
		if (len == 0)
			return 0;
		data = kmalloc(len, GFP_NOFS);
		if (data == NULL)
			return -ENOMEM;
		error = posix_acl_to_xattr(&init_user_ns, acl, data, len);
		if (error < 0)
			goto out;
	} else {
		data = NULL;
		len = 0;
	}

	error = __gfs2_xattr_set(inode, name, data, len, 0, GFS2_EATYPE_SYS);
	if (error)
		goto out;
	set_cached_acl(inode, type, acl);
out:
	kfree(data);
	return error;
}

int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
	struct gfs2_inode *ip = GFS2_I(inode);
	struct gfs2_holder gh;
	bool need_unlock = false;
	int ret;

	ret = gfs2_rsqa_alloc(ip);
	if (ret)
		return ret;

	if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
		ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
		if (ret)
			return ret;
		need_unlock = true;
	}
	ret = __gfs2_set_acl(inode, acl, type);
	if (need_unlock)
		gfs2_glock_dq_uninit(&gh);
	return ret;
}
='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-11 11:17:54 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-11 11:17:54 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/nl802154.h?id=69973b830859bc6529a7a0468ba0d80ee5117826'>69973b830859bc6529a7a0468ba0d80ee5117826</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/nl802154.h?id=69973b830859bc6529a7a0468ba0d80ee5117826'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=69973b830859bc6529a7a0468ba0d80ee5117826'>5f11fe15ed9d9a3ab9c92242030e54b73ecdce45</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/nl802154.h?id=69973b830859bc6529a7a0468ba0d80ee5117826'>include/net/nl802154.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/nl802154.h?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>2e4333c14de06a333783d6812cf3c4998f78b0c8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/nl802154.h?id=69973b830859bc6529a7a0468ba0d80ee5117826&amp;id2=2e4333c14de06a333783d6812cf3c4998f78b0c8'>diff</a>)</td></tr></table>
<div class='commit-subject'>Linux 4.9</div><div class='commit-msg'></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=69973b830859bc6529a7a0468ba0d80ee5117826'>Diffstat</a> (limited to 'include/net/nl802154.h')</div><table summary='diffstat' class='diffstat'>