[linux.git] / fs / quota.c

/*
 * Quota code necessary even when VFS quota support is not compiled
 * into the kernel.  The interesting stuff is over in dquot.c, here
 * we have symbols for initial quotactl(2) handling, the sysctl(2)
 * variables, etc - things needed even when quota support disabled.
 */

#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <asm/current.h>
#include <asm/uaccess.h>
#include <linux/kernel.h>
#include <linux/smp_lock.h>
#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/buffer_head.h>

/* Check validity of generic quotactl commands */
static int generic_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
{
	if (type >= MAXQUOTAS)
		return -EINVAL;
	if (!sb && cmd != Q_SYNC)
		return -ENODEV;
	/* Is operation supported? */
	if (sb && !sb->s_qcop)
		return -ENOSYS;

	switch (cmd) {
		case Q_GETFMT:
			break;
		case Q_QUOTAON:
			if (!sb->s_qcop->quota_on)
				return -ENOSYS;
			break;
		case Q_QUOTAOFF:
			if (!sb->s_qcop->quota_off)
				return -ENOSYS;
			break;
		case Q_SETINFO:
			if (!sb->s_qcop->set_info)
				return -ENOSYS;
			break;
		case Q_GETINFO:
			if (!sb->s_qcop->get_info)
				return -ENOSYS;
			break;
		case Q_SETQUOTA:
			if (!sb->s_qcop->set_dqblk)
				return -ENOSYS;
			break;
		case Q_GETQUOTA:
			if (!sb->s_qcop->get_dqblk)
				return -ENOSYS;
			break;
		case Q_SYNC:
			if (sb && !sb->s_qcop->quota_sync)
				return -ENOSYS;
			break;
		default:
			return -EINVAL;
	}

	/* Is quota turned on for commands which need it? */
	switch (cmd) {
		case Q_GETFMT:
		case Q_GETINFO:
		case Q_QUOTAOFF:
		case Q_SETINFO:
		case Q_SETQUOTA:
		case Q_GETQUOTA:
			/* This is just informative test so we are satisfied without a lock */
			if (!sb_has_quota_enabled(sb, type))
				return -ESRCH;
	}

	/* Check privileges */
	if (cmd == Q_GETQUOTA) {
		if (((type == USRQUOTA && current->euid != id) ||
		     (type == GRPQUOTA && !in_egroup_p(id))) &&
		    !capable(CAP_SYS_ADMIN))
			return -EPERM;
	}
	else if (cmd != Q_GETFMT && cmd != Q_SYNC && cmd != Q_GETINFO)
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

	return 0;
}

/* Check validity of XFS Quota Manager commands */
static int xqm_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
{
	if (type >= XQM_MAXQUOTAS)
		return -EINVAL;
	if (!sb)
		return -ENODEV;
	if (!sb->s_qcop)
		return -ENOSYS;

	switch (cmd) {
		case Q_XQUOTAON:
		case Q_XQUOTAOFF:
		case Q_XQUOTARM:
			if (!sb->s_qcop->set_xstate)
				return -ENOSYS;
			break;
		case Q_XGETQSTAT:
			if (!sb->s_qcop->get_xstate)
				return -ENOSYS;
			break;
		case Q_XSETQLIM:
			if (!sb->s_qcop->set_xquota)
				return -ENOSYS;
			break;
		case Q_XGETQUOTA:
			if (!sb->s_qcop->get_xquota)
				return -ENOSYS;
			break;
		default:
			return -EINVAL;
	}

	/* Check privileges */
	if (cmd == Q_XGETQUOTA) {
		if (((type == XQM_USRQUOTA && current->euid != id) ||
		     (type == XQM_GRPQUOTA && !in_egroup_p(id))) &&
		     !capable(CAP_SYS_ADMIN))
			return -EPERM;
	} else if (cmd != Q_XGETQSTAT) {
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
	}

	return 0;
}

static int check_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
{
	int error;

	if (XQM_COMMAND(cmd))
		error = xqm_quotactl_valid(sb, type, cmd, id);
	else
		error = generic_quotactl_valid(sb, type, cmd, id);
	if (!error)
		error = security_quotactl(cmd, type, id, sb);
	return error;
}

static void quota_sync_sb(struct super_block *sb, int type)
{
	int cnt;
	struct inode *discard[MAXQUOTAS];

	sb->s_qcop->quota_sync(sb, type);
	/* This is not very clever (and fast) but currently I don't know about
	 * any other simple way of getting quota data to disk and we must get
	 * them there for userspace to be visible... */
	if (sb->s_op->sync_fs)
		sb->s_op->sync_fs(sb, 1);
	sync_blockdev(sb->s_bdev);

	/* Now when everything is written we can discard the pagecache so
	 * that userspace sees the changes. We need i_sem and so we could
	 * not do it inside dqonoff_sem. Moreover we need to be carefull
	 * about races with quotaoff() (that is the reason why we have own
	 * reference to inode). */
	down(&sb_dqopt(sb)->dqonoff_sem);
	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
		discard[cnt] = NULL;
		if (type != -1 && cnt != type)
			continue;
		if (!sb_has_quota_enabled(sb, cnt))
			continue;
		discard[cnt] = igrab(sb_dqopt(sb)->files[cnt]);
	}
	up(&sb_dqopt(sb)->dqonoff_sem);
	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
		if (discard[cnt]) {
			down(&discard[cnt]->i_sem);
			truncate_inode_pages(&discard[cnt]->i_data, 0);
			up(&discard[cnt]->i_sem);
			iput(discard[cnt]);
		}
	}
}

void sync_dquots(struct super_block *sb, int type)
{
	int cnt, dirty;

	if (sb) {
		if (sb->s_qcop->quota_sync)
			quota_sync_sb(sb, type);
		return;
	}

	spin_lock(&sb_lock);
restart:
	list_for_each_entry(sb, &super_blocks, s_list) {
		/* This test just improves performance so it needn't be reliable... */
		for (cnt = 0, dirty = 0; cnt < MAXQUOTAS; cnt++)
			if ((type == cnt || type == -1) && sb_has_quota_enabled(sb, cnt)
			    && info_any_dirty(&sb_dqopt(sb)->info[cnt]))
				dirty = 1;
		if (!dirty)
			continue;
		sb->s_count++;
		spin_unlock(&sb_lock);
		down_read(&sb->s_umount);
		if (sb->s_root && sb->s_qcop->quota_sync)
			quota_sync_sb(sb, type);
		up_read(&sb->s_umount);
		spin_lock(&sb_lock);
		if (__put_super_and_need_restart(sb))
			goto restart;
	}
	spin_unlock(&sb_lock);
}

/* Copy parameters and call proper function */
static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, void __user *addr)
{
	int ret;

	switch (cmd) {
		case Q_QUOTAON: {
			char *pathname;

			if (IS_ERR(pathname = getname(addr)))
				return PTR_ERR(pathname);
			ret = sb->s_qcop->quota_on(sb, type, id, pathname);
			putname(pathname);
			return ret;
		}
		case Q_QUOTAOFF:
			return sb->s_qcop->quota_off(sb, type);

		case Q_GETFMT: {
			__u32 fmt;

			down_read(&sb_dqopt(sb)->dqptr_sem);
			if (!sb_has_quota_enabled(sb, type)) {
				up_read(&sb_dqopt(sb)->dqptr_sem);
				return -ESRCH;
			}
			fmt = sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id;
			up_read(&sb_dqopt(sb)->dqptr_sem);
			if (copy_to_user(addr, &fmt, sizeof(fmt)))
				return -EFAULT;
			return 0;
		}
		case Q_GETINFO: {
			struct if_dqinfo info;

			if ((ret = sb->s_qcop->get_info(sb, type, &info)))
				return ret;
			if (copy_to_user(addr, &info, sizeof(info)))
				return -EFAULT;
			return 0;
		}
		case Q_SETINFO: {
			struct if_dqinfo info;

			if (copy_from_user(&info, addr, sizeof(info)))
				return -EFAULT;
			return sb->s_qcop->set_info(sb, type, &info);
		}
		case Q_GETQUOTA: {
			struct if_dqblk idq;

			if ((ret = sb->s_qcop->get_dqblk(sb, type, id, &idq)))
				return ret;
			if (copy_to_user(addr, &idq, sizeof(idq)))
				return -EFAULT;
			return 0;
		}
		case Q_SETQUOTA: {
			struct if_dqblk idq;

			if (copy_from_user(&idq, addr, sizeof(idq)))
				return -EFAULT;
			return sb->s_qcop->set_dqblk(sb, type, id, &idq);
		}
		case Q_SYNC:
			sync_dquots(sb, type);
			return 0;

		case Q_XQUOTAON:
		case Q_XQUOTAOFF:
		case Q_XQUOTARM: {
			__u32 flags;

			if (copy_from_user(&flags, addr, sizeof(flags)))
				return -EFAULT;
			return sb->s_qcop->set_xstate(sb, flags, cmd);
		}
		case Q_XGETQSTAT: {
			struct fs_quota_stat fqs;
		
			if ((ret = sb->s_qcop->get_xstate(sb, &fqs)))
				return ret;
			if (copy_to_user(addr, &fqs, sizeof(fqs)))
				return -EFAULT;
			return 0;
		}
		case Q_XSETQLIM: {
			struct fs_disk_quota fdq;

			if (copy_from_user(&fdq, addr, sizeof(fdq)))
				return -EFAULT;
		       return sb->s_qcop->set_xquota(sb, type, id, &fdq);
		}
		case Q_XGETQUOTA: {
			struct fs_disk_quota fdq;

			if ((ret = sb->s_qcop->get_xquota(sb, type, id, &fdq)))
				return ret;
			if (copy_to_user(addr, &fdq, sizeof(fdq)))
				return -EFAULT;
			return 0;
		}
		/* We never reach here unless validity check is broken */
		default:
			BUG();
	}
	return 0;
}

/*
 * This is the system call interface. This communicates with
 * the user-level programs. Currently this only supports diskquota
 * calls. Maybe we need to add the process quotas etc. in the future,
 * but we probably should use rlimits for that.
 */
asmlinkage long sys_quotactl(unsigned int cmd, const char __user *special, qid_t id, void __user *addr)
{
	uint cmds, type;
	struct super_block *sb = NULL;
	struct block_device *bdev;
	char *tmp;
	int ret;

	cmds = cmd >> SUBCMDSHIFT;
	type = cmd & SUBCMDMASK;

	if (cmds != Q_SYNC || special) {
		tmp = getname(special);
		if (IS_ERR(tmp))
			return PTR_ERR(tmp);
		bdev = lookup_bdev(tmp);
		putname(tmp);
		if (IS_ERR(bdev))
			return PTR_ERR(bdev);
		sb = get_super(bdev);
		bdput(bdev);
		if (!sb)
			return -ENODEV;
	}

	ret = check_quotactl_valid(sb, type, cmds, id);
	if (ret >= 0)
		ret = do_quotactl(sb, type, cmds, id, addr);
	if (sb)
		drop_super(sb);

	return ret;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Quota code necessary even when VFS quota support is not compiled
	3	* into the kernel. The interesting stuff is over in dquot.c, here
	4	* we have symbols for initial quotactl(2) handling, the sysctl(2)
	5	* variables, etc - things needed even when quota support disabled.
	6	*/
	7
	8	#include <linux/fs.h>
	9	#include <linux/namei.h>
	10	#include <linux/slab.h>
	11	#include <asm/current.h>
	12	#include <asm/uaccess.h>
	13	#include <linux/kernel.h>
	14	#include <linux/smp_lock.h>
	15	#include <linux/security.h>
	16	#include <linux/syscalls.h>
	17	#include <linux/buffer_head.h>
	18
	19	/* Check validity of generic quotactl commands */
	20	static int generic_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
	21	{
	22	if (type >= MAXQUOTAS)
	23	return -EINVAL;
	24	if (!sb && cmd != Q_SYNC)
	25	return -ENODEV;
	26	/* Is operation supported? */
	27	if (sb && !sb->s_qcop)
	28	return -ENOSYS;
	29
	30	switch (cmd) {
	31	case Q_GETFMT:
	32	break;
	33	case Q_QUOTAON:
	34	if (!sb->s_qcop->quota_on)
	35	return -ENOSYS;
	36	break;
	37	case Q_QUOTAOFF:
	38	if (!sb->s_qcop->quota_off)
	39	return -ENOSYS;
	40	break;
	41	case Q_SETINFO:
	42	if (!sb->s_qcop->set_info)
	43	return -ENOSYS;
	44	break;
	45	case Q_GETINFO:
	46	if (!sb->s_qcop->get_info)
	47	return -ENOSYS;
	48	break;
	49	case Q_SETQUOTA:
	50	if (!sb->s_qcop->set_dqblk)
	51	return -ENOSYS;
	52	break;
	53	case Q_GETQUOTA:
	54	if (!sb->s_qcop->get_dqblk)
	55	return -ENOSYS;
	56	break;
	57	case Q_SYNC:
	58	if (sb && !sb->s_qcop->quota_sync)
	59	return -ENOSYS;
	60	break;
	61	default:
	62	return -EINVAL;
	63	}
	64
65	/* Is quota turned on for commands which need it? */
66	switch (cmd) {
67	case Q_GETFMT:
68	case Q_GETINFO:
69	case Q_QUOTAOFF:
70	case Q_SETINFO:
71	case Q_SETQUOTA:
72	case Q_GETQUOTA:
73	/* This is just informative test so we are satisfied without a lock */
74	if (!sb_has_quota_enabled(sb, type))
75	return -ESRCH;
76	}
77
78	/* Check privileges */
79	if (cmd == Q_GETQUOTA) {
80	if (((type == USRQUOTA && current->euid != id) \|\|
81	(type == GRPQUOTA && !in_egroup_p(id))) &&
82	!capable(CAP_SYS_ADMIN))
83	return -EPERM;
84	}
85	else if (cmd != Q_GETFMT && cmd != Q_SYNC && cmd != Q_GETINFO)
86	if (!capable(CAP_SYS_ADMIN))
87	return -EPERM;
88
89	return 0;
90	}
91
92	/* Check validity of XFS Quota Manager commands */
93	static int xqm_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
94	{
95	if (type >= XQM_MAXQUOTAS)
96	return -EINVAL;
97	if (!sb)
98	return -ENODEV;
99	if (!sb->s_qcop)
100	return -ENOSYS;
101
102	switch (cmd) {
103	case Q_XQUOTAON:
104	case Q_XQUOTAOFF:
105	case Q_XQUOTARM:
106	if (!sb->s_qcop->set_xstate)
107	return -ENOSYS;
108	break;
109	case Q_XGETQSTAT:
110	if (!sb->s_qcop->get_xstate)
111	return -ENOSYS;
112	break;
113	case Q_XSETQLIM:
114	if (!sb->s_qcop->set_xquota)
115	return -ENOSYS;
116	break;
117	case Q_XGETQUOTA:
118	if (!sb->s_qcop->get_xquota)
119	return -ENOSYS;
120	break;
121	default:
122	return -EINVAL;
123	}
124
125	/* Check privileges */
126	if (cmd == Q_XGETQUOTA) {
127	if (((type == XQM_USRQUOTA && current->euid != id) \|\|
128	(type == XQM_GRPQUOTA && !in_egroup_p(id))) &&
129	!capable(CAP_SYS_ADMIN))
130	return -EPERM;
131	} else if (cmd != Q_XGETQSTAT) {
132	if (!capable(CAP_SYS_ADMIN))
133	return -EPERM;
134	}
135
136	return 0;
137	}
138
139	static int check_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
140	{
141	int error;
142
143	if (XQM_COMMAND(cmd))
144	error = xqm_quotactl_valid(sb, type, cmd, id);
145	else
146	error = generic_quotactl_valid(sb, type, cmd, id);
147	if (!error)
148	error = security_quotactl(cmd, type, id, sb);
149	return error;
150	}
151
1da177e4 LT	152	static void quota_sync_sb(struct super_block *sb, int type)
	153	{
	154	int cnt;
	155	struct inode *discard[MAXQUOTAS];
	156
	157	sb->s_qcop->quota_sync(sb, type);
	158	/* This is not very clever (and fast) but currently I don't know about
	159	* any other simple way of getting quota data to disk and we must get
	160	* them there for userspace to be visible... */
	161	if (sb->s_op->sync_fs)
	162	sb->s_op->sync_fs(sb, 1);
	163	sync_blockdev(sb->s_bdev);
	164
	165	/* Now when everything is written we can discard the pagecache so
	166	* that userspace sees the changes. We need i_sem and so we could
	167	* not do it inside dqonoff_sem. Moreover we need to be carefull
	168	* about races with quotaoff() (that is the reason why we have own
	169	* reference to inode). */
	170	down(&sb_dqopt(sb)->dqonoff_sem);
	171	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
	172	discard[cnt] = NULL;
	173	if (type != -1 && cnt != type)
	174	continue;
	175	if (!sb_has_quota_enabled(sb, cnt))
	176	continue;
	177	discard[cnt] = igrab(sb_dqopt(sb)->files[cnt]);
	178	}
	179	up(&sb_dqopt(sb)->dqonoff_sem);
	180	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
	181	if (discard[cnt]) {
	182	down(&discard[cnt]->i_sem);
	183	truncate_inode_pages(&discard[cnt]->i_data, 0);
	184	up(&discard[cnt]->i_sem);
	185	iput(discard[cnt]);
	186	}
	187	}
	188	}
	189
	190	void sync_dquots(struct super_block *sb, int type)
	191	{
618f0636 KK	192	int cnt, dirty;
618f0636 KK	193
1da177e4 LT	194	if (sb) {
	195	if (sb->s_qcop->quota_sync)
	196	quota_sync_sb(sb, type);
618f0636	197	return;
1da177e4	198	}
618f0636 KK	199
	200	spin_lock(&sb_lock);
	201	restart:
	202	list_for_each_entry(sb, &super_blocks, s_list) {
	203	/* This test just improves performance so it needn't be reliable... */
	204	for (cnt = 0, dirty = 0; cnt < MAXQUOTAS; cnt++)
	205	if ((type == cnt \|\| type == -1) && sb_has_quota_enabled(sb, cnt)
	206	&& info_any_dirty(&sb_dqopt(sb)->info[cnt]))
	207	dirty = 1;
	208	if (!dirty)
	209	continue;
	210	sb->s_count++;
	211	spin_unlock(&sb_lock);
	212	down_read(&sb->s_umount);
	213	if (sb->s_root && sb->s_qcop->quota_sync)
	214	quota_sync_sb(sb, type);
	215	up_read(&sb->s_umount);
	216	spin_lock(&sb_lock);
	217	if (__put_super_and_need_restart(sb))
	218	goto restart;
1da177e4	219	}
618f0636	220	spin_unlock(&sb_lock);
1da177e4 LT	221	}
	222
	223	/* Copy parameters and call proper function */
	224	static int do_quotactl(struct super_block sb, int type, int cmd, qid_t id, void __user addr)
	225	{
	226	int ret;
	227
	228	switch (cmd) {
	229	case Q_QUOTAON: {
	230	char *pathname;
	231
	232	if (IS_ERR(pathname = getname(addr)))
	233	return PTR_ERR(pathname);
	234	ret = sb->s_qcop->quota_on(sb, type, id, pathname);
	235	putname(pathname);
	236	return ret;
	237	}
	238	case Q_QUOTAOFF:
	239	return sb->s_qcop->quota_off(sb, type);
	240
	241	case Q_GETFMT: {
	242	__u32 fmt;
	243
	244	down_read(&sb_dqopt(sb)->dqptr_sem);
	245	if (!sb_has_quota_enabled(sb, type)) {
	246	up_read(&sb_dqopt(sb)->dqptr_sem);
	247	return -ESRCH;
	248	}
	249	fmt = sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id;
	250	up_read(&sb_dqopt(sb)->dqptr_sem);
	251	if (copy_to_user(addr, &fmt, sizeof(fmt)))
	252	return -EFAULT;
	253	return 0;
	254	}
	255	case Q_GETINFO: {
	256	struct if_dqinfo info;
	257
	258	if ((ret = sb->s_qcop->get_info(sb, type, &info)))
	259	return ret;
	260	if (copy_to_user(addr, &info, sizeof(info)))
	261	return -EFAULT;
	262	return 0;
	263	}
	264	case Q_SETINFO: {
	265	struct if_dqinfo info;
	266
	267	if (copy_from_user(&info, addr, sizeof(info)))
	268	return -EFAULT;
	269	return sb->s_qcop->set_info(sb, type, &info);
	270	}
	271	case Q_GETQUOTA: {
	272	struct if_dqblk idq;
	273
	274	if ((ret = sb->s_qcop->get_dqblk(sb, type, id, &idq)))
	275	return ret;
	276	if (copy_to_user(addr, &idq, sizeof(idq)))
	277	return -EFAULT;
	278	return 0;
	279	}
	280	case Q_SETQUOTA: {
	281	struct if_dqblk idq;
	282
	283	if (copy_from_user(&idq, addr, sizeof(idq)))
	284	return -EFAULT;
285	return sb->s_qcop->set_dqblk(sb, type, id, &idq);
286	}
287	case Q_SYNC:
288	sync_dquots(sb, type);
289	return 0;
290
291	case Q_XQUOTAON:
292	case Q_XQUOTAOFF:
293	case Q_XQUOTARM: {
294	__u32 flags;
295
296	if (copy_from_user(&flags, addr, sizeof(flags)))
297	return -EFAULT;
298	return sb->s_qcop->set_xstate(sb, flags, cmd);
299	}
300	case Q_XGETQSTAT: {
301	struct fs_quota_stat fqs;
302
303	if ((ret = sb->s_qcop->get_xstate(sb, &fqs)))
304	return ret;
305	if (copy_to_user(addr, &fqs, sizeof(fqs)))
306	return -EFAULT;
307	return 0;
308	}
309	case Q_XSETQLIM: {
310	struct fs_disk_quota fdq;
311
312	if (copy_from_user(&fdq, addr, sizeof(fdq)))
313	return -EFAULT;
314	return sb->s_qcop->set_xquota(sb, type, id, &fdq);
315	}
316	case Q_XGETQUOTA: {
317	struct fs_disk_quota fdq;
318
319	if ((ret = sb->s_qcop->get_xquota(sb, type, id, &fdq)))
320	return ret;
321	if (copy_to_user(addr, &fdq, sizeof(fdq)))
322	return -EFAULT;
323	return 0;
324	}
325	/* We never reach here unless validity check is broken */
326	default:
327	BUG();
328	}
329	return 0;
330	}
331
332	/*
333	* This is the system call interface. This communicates with
334	* the user-level programs. Currently this only supports diskquota
335	* calls. Maybe we need to add the process quotas etc. in the future,
336	* but we probably should use rlimits for that.
337	*/
338	asmlinkage long sys_quotactl(unsigned int cmd, const char __user special, qid_t id, void __user addr)
339	{
340	uint cmds, type;
341	struct super_block *sb = NULL;
342	struct block_device *bdev;
343	char *tmp;
344	int ret;
345
346	cmds = cmd >> SUBCMDSHIFT;
347	type = cmd & SUBCMDMASK;
348
349	if (cmds != Q_SYNC \|\| special) {
350	tmp = getname(special);
351	if (IS_ERR(tmp))
352	return PTR_ERR(tmp);
353	bdev = lookup_bdev(tmp);
354	putname(tmp);
355	if (IS_ERR(bdev))
356	return PTR_ERR(bdev);
357	sb = get_super(bdev);
358	bdput(bdev);
359	if (!sb)
360	return -ENODEV;
361	}
362
363	ret = check_quotactl_valid(sb, type, cmds, id);
364	if (ret >= 0)
365	ret = do_quotactl(sb, type, cmds, id, addr);
366	if (sb)
367	drop_super(sb);
368
369	return ret;
370	}