[linux-block.git] / security / tomoyo / mount.c

/*
 * security/tomoyo/mount.c
 *
 * Copyright (C) 2005-2010  NTT DATA CORPORATION
 */

#include <linux/slab.h>
#include "common.h"

/* String table for special mount operations. */
static const char * const tomoyo_mounts[TOMOYO_MAX_SPECIAL_MOUNT] = {
	[TOMOYO_MOUNT_BIND]            = "--bind",
	[TOMOYO_MOUNT_MOVE]            = "--move",
	[TOMOYO_MOUNT_REMOUNT]         = "--remount",
	[TOMOYO_MOUNT_MAKE_UNBINDABLE] = "--make-unbindable",
	[TOMOYO_MOUNT_MAKE_PRIVATE]    = "--make-private",
	[TOMOYO_MOUNT_MAKE_SLAVE]      = "--make-slave",
	[TOMOYO_MOUNT_MAKE_SHARED]     = "--make-shared",
};

/**
 * tomoyo_audit_mount_log - Audit mount log.
 *
 * @r: Pointer to "struct tomoyo_request_info".
 *
 * Returns 0 on success, negative value otherwise.
 */
static int tomoyo_audit_mount_log(struct tomoyo_request_info *r)
{
	const char *dev = r->param.mount.dev->name;
	const char *dir = r->param.mount.dir->name;
	const char *type = r->param.mount.type->name;
	const unsigned long flags = r->param.mount.flags;
	if (r->granted)
		return 0;
	if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT])
		tomoyo_warn_log(r, "mount -o remount %s 0x%lX", dir, flags);
	else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND]
		 || type == tomoyo_mounts[TOMOYO_MOUNT_MOVE])
		tomoyo_warn_log(r, "mount %s %s %s 0x%lX", type, dev, dir,
				flags);
	else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] ||
		 type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] ||
		 type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] ||
		 type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED])
		tomoyo_warn_log(r, "mount %s %s 0x%lX", type, dir, flags);
	else
		tomoyo_warn_log(r, "mount -t %s %s %s 0x%lX", type, dev, dir,
				flags);
	return tomoyo_supervisor(r, "allow_mount %s %s %s 0x%lX\n",
				 r->param.mount.dev->name,
				 r->param.mount.dir->name, type, flags);
}

static bool tomoyo_check_mount_acl(struct tomoyo_request_info *r,
				   const struct tomoyo_acl_info *ptr)
{
	const struct tomoyo_mount_acl *acl =
		container_of(ptr, typeof(*acl), head);
	return tomoyo_compare_number_union(r->param.mount.flags, &acl->flags) &&
		tomoyo_compare_name_union(r->param.mount.type, &acl->fs_type) &&
		tomoyo_compare_name_union(r->param.mount.dir, &acl->dir_name) &&
		(!r->param.mount.need_dev ||
		 tomoyo_compare_name_union(r->param.mount.dev, &acl->dev_name));
}

/**
 * tomoyo_mount_acl - Check permission for mount() operation.
 *
 * @r:        Pointer to "struct tomoyo_request_info".
 * @dev_name: Name of device file.
 * @dir:      Pointer to "struct path".
 * @type:     Name of filesystem type.
 * @flags:    Mount options.
 *
 * Returns 0 on success, negative value otherwise.
 *
 * Caller holds tomoyo_read_lock().
 */
static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name,
			    struct path *dir, const char *type,
			    unsigned long flags)
{
	struct path path;
	struct file_system_type *fstype = NULL;
	const char *requested_type = NULL;
	const char *requested_dir_name = NULL;
	const char *requested_dev_name = NULL;
	struct tomoyo_path_info rtype;
	struct tomoyo_path_info rdev;
	struct tomoyo_path_info rdir;
	int need_dev = 0;
	int error = -ENOMEM;

	/* Get fstype. */
	requested_type = tomoyo_encode(type);
	if (!requested_type)
		goto out;
	rtype.name = requested_type;
	tomoyo_fill_path_info(&rtype);

	/* Get mount point. */
	requested_dir_name = tomoyo_realpath_from_path(dir);
	if (!requested_dir_name) {
		error = -ENOMEM;
		goto out;
	}
	rdir.name = requested_dir_name;
	tomoyo_fill_path_info(&rdir);

	/* Compare fs name. */
	if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT]) {
		/* dev_name is ignored. */
	} else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] ||
		   type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] ||
		   type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] ||
		   type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]) {
		/* dev_name is ignored. */
	} else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND] ||
		   type == tomoyo_mounts[TOMOYO_MOUNT_MOVE]) {
		need_dev = -1; /* dev_name is a directory */
	} else {
		fstype = get_fs_type(type);
		if (!fstype) {
			error = -ENODEV;
			goto out;
		}
		if (fstype->fs_flags & FS_REQUIRES_DEV)
			/* dev_name is a block device file. */
			need_dev = 1;
	}
	if (need_dev) {
		/* Get mount point or device file. */
		if (kern_path(dev_name, LOOKUP_FOLLOW, &path)) {
			error = -ENOENT;
			goto out;
		}
		requested_dev_name = tomoyo_realpath_from_path(&path);
		path_put(&path);
		if (!requested_dev_name) {
			error = -ENOENT;
			goto out;
		}
	} else {
		/* Map dev_name to "<NULL>" if no dev_name given. */
		if (!dev_name)
			dev_name = "<NULL>";
		requested_dev_name = tomoyo_encode(dev_name);
		if (!requested_dev_name) {
			error = -ENOMEM;
			goto out;
		}
	}
	rdev.name = requested_dev_name;
	tomoyo_fill_path_info(&rdev);
	r->param_type = TOMOYO_TYPE_MOUNT_ACL;
	r->param.mount.need_dev = need_dev;
	r->param.mount.dev = &rdev;
	r->param.mount.dir = &rdir;
	r->param.mount.type = &rtype;
	r->param.mount.flags = flags;
	do {
		tomoyo_check_acl(r, tomoyo_check_mount_acl);
		error = tomoyo_audit_mount_log(r);
	} while (error == TOMOYO_RETRY_REQUEST);
 out:
	kfree(requested_dev_name);
	kfree(requested_dir_name);
	if (fstype)
		put_filesystem(fstype);
	kfree(requested_type);
	return error;
}

/**
 * tomoyo_mount_permission - Check permission for mount() operation.
 *
 * @dev_name:  Name of device file.
 * @path:      Pointer to "struct path".
 * @type:      Name of filesystem type. May be NULL.
 * @flags:     Mount options.
 * @data_page: Optional data. May be NULL.
 *
 * Returns 0 on success, negative value otherwise.
 */
int tomoyo_mount_permission(char *dev_name, struct path *path,
			    const char *type, unsigned long flags,
			    void *data_page)
{
	struct tomoyo_request_info r;
	int error;
	int idx;

	if (tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_MOUNT)
	    == TOMOYO_CONFIG_DISABLED)
		return 0;
	if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
		flags &= ~MS_MGC_MSK;
	if (flags & MS_REMOUNT) {
		type = tomoyo_mounts[TOMOYO_MOUNT_REMOUNT];
		flags &= ~MS_REMOUNT;
	}
	if (flags & MS_MOVE) {
		type = tomoyo_mounts[TOMOYO_MOUNT_MOVE];
		flags &= ~MS_MOVE;
	}
	if (flags & MS_BIND) {
		type = tomoyo_mounts[TOMOYO_MOUNT_BIND];
		flags &= ~MS_BIND;
	}
	if (flags & MS_UNBINDABLE) {
		type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE];
		flags &= ~MS_UNBINDABLE;
	}
	if (flags & MS_PRIVATE) {
		type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE];
		flags &= ~MS_PRIVATE;
	}
	if (flags & MS_SLAVE) {
		type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE];
		flags &= ~MS_SLAVE;
	}
	if (flags & MS_SHARED) {
		type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED];
		flags &= ~MS_SHARED;
	}
	if (!type)
		type = "<NULL>";
	idx = tomoyo_read_lock();
	error = tomoyo_mount_acl(&r, dev_name, path, type, flags);
	tomoyo_read_unlock(idx);
	return error;
}

static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a,
				  const struct tomoyo_acl_info *b)
{
	const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head);
	const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head);
	return tomoyo_same_acl_head(&p1->head, &p2->head) &&
		tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) &&
		tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) &&
		tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) &&
		tomoyo_same_number_union(&p1->flags, &p2->flags);
}

/**
 * tomoyo_write_mount - Write "struct tomoyo_mount_acl" list.
 *
 * @data:      String to parse.
 * @domain:    Pointer to "struct tomoyo_domain_info".
 * @is_delete: True if it is a delete request.
 *
 * Returns 0 on success, negative value otherwise.
 *
 * Caller holds tomoyo_read_lock().
 */
int tomoyo_write_mount(char *data, struct tomoyo_domain_info *domain,
		       const bool is_delete)
{
	struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL };
	int error = is_delete ? -ENOENT : -ENOMEM;
	char *w[4];
	if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[3][0])
		return -EINVAL;
	if (!tomoyo_parse_name_union(w[0], &e.dev_name) ||
	    !tomoyo_parse_name_union(w[1], &e.dir_name) ||
	    !tomoyo_parse_name_union(w[2], &e.fs_type) ||
	    !tomoyo_parse_number_union(w[3], &e.flags))
		goto out;
	error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
				     tomoyo_same_mount_acl, NULL);
 out:
	tomoyo_put_name_union(&e.dev_name);
	tomoyo_put_name_union(&e.dir_name);
	tomoyo_put_name_union(&e.fs_type);
	tomoyo_put_number_union(&e.flags);
	return error;
}
Commit	Line	Data
2106ccd9 TH	1	/*
	2	* security/tomoyo/mount.c
	3	*
	4	* Copyright (C) 2005-2010 NTT DATA CORPORATION
	5	*/
	6
	7	#include <linux/slab.h>
	8	#include "common.h"
	9
b5bc60b4 TH	10	/* String table for special mount operations. */
	11	static const char * const tomoyo_mounts[TOMOYO_MAX_SPECIAL_MOUNT] = {
	12	[TOMOYO_MOUNT_BIND] = "--bind",
	13	[TOMOYO_MOUNT_MOVE] = "--move",
	14	[TOMOYO_MOUNT_REMOUNT] = "--remount",
	15	[TOMOYO_MOUNT_MAKE_UNBINDABLE] = "--make-unbindable",
	16	[TOMOYO_MOUNT_MAKE_PRIVATE] = "--make-private",
	17	[TOMOYO_MOUNT_MAKE_SLAVE] = "--make-slave",
	18	[TOMOYO_MOUNT_MAKE_SHARED] = "--make-shared",
	19	};
2106ccd9	20
99a85259 TH	21	/**
	22	* tomoyo_audit_mount_log - Audit mount log.
	23	*
	24	* @r: Pointer to "struct tomoyo_request_info".
	25	*
	26	* Returns 0 on success, negative value otherwise.
	27	*/
	28	static int tomoyo_audit_mount_log(struct tomoyo_request_info *r)
	29	{
	30	const char *dev = r->param.mount.dev->name;
	31	const char *dir = r->param.mount.dir->name;
	32	const char *type = r->param.mount.type->name;
	33	const unsigned long flags = r->param.mount.flags;
	34	if (r->granted)
	35	return 0;
b5bc60b4	36	if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT])
99a85259	37	tomoyo_warn_log(r, "mount -o remount %s 0x%lX", dir, flags);
b5bc60b4 TH	38	else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND]
b5bc60b4 TH	39	\|\| type == tomoyo_mounts[TOMOYO_MOUNT_MOVE])
99a85259 TH	40	tomoyo_warn_log(r, "mount %s %s %s 0x%lX", type, dev, dir,
99a85259 TH	41	flags);
b5bc60b4 TH	42	else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] \|\|
	43	type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] \|\|
	44	type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] \|\|
	45	type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED])
99a85259 TH	46	tomoyo_warn_log(r, "mount %s %s 0x%lX", type, dir, flags);
	47	else
	48	tomoyo_warn_log(r, "mount -t %s %s %s 0x%lX", type, dev, dir,
	49	flags);
b5bc60b4	50	return tomoyo_supervisor(r, "allow_mount %s %s %s 0x%lX\n",
7c75964f TH	51	r->param.mount.dev->name,
7c75964f TH	52	r->param.mount.dir->name, type, flags);
99a85259 TH	53	}
99a85259 TH	54
484ca79c	55	static bool tomoyo_check_mount_acl(struct tomoyo_request_info *r,
99a85259 TH	56	const struct tomoyo_acl_info *ptr)
	57	{
	58	const struct tomoyo_mount_acl *acl =
	59	container_of(ptr, typeof(*acl), head);
	60	return tomoyo_compare_number_union(r->param.mount.flags, &acl->flags) &&
	61	tomoyo_compare_name_union(r->param.mount.type, &acl->fs_type) &&
	62	tomoyo_compare_name_union(r->param.mount.dir, &acl->dir_name) &&
	63	(!r->param.mount.need_dev \|\|
	64	tomoyo_compare_name_union(r->param.mount.dev, &acl->dev_name));
	65	}
	66
2106ccd9	67	/**
d795ef9e	68	* tomoyo_mount_acl - Check permission for mount() operation.
2106ccd9 TH	69	*
	70	* @r: Pointer to "struct tomoyo_request_info".
	71	* @dev_name: Name of device file.
	72	* @dir: Pointer to "struct path".
	73	* @type: Name of filesystem type.
	74	* @flags: Mount options.
	75	*
	76	* Returns 0 on success, negative value otherwise.
	77	*
	78	* Caller holds tomoyo_read_lock().
	79	*/
d795ef9e	80	static int tomoyo_mount_acl(struct tomoyo_request_info r, char dev_name,
b5bc60b4 TH	81	struct path dir, const char type,
b5bc60b4 TH	82	unsigned long flags)
2106ccd9 TH	83	{
2106ccd9 TH	84	struct path path;
2106ccd9 TH	85	struct file_system_type *fstype = NULL;
	86	const char *requested_type = NULL;
	87	const char *requested_dir_name = NULL;
	88	const char *requested_dev_name = NULL;
	89	struct tomoyo_path_info rtype;
	90	struct tomoyo_path_info rdev;
	91	struct tomoyo_path_info rdir;
	92	int need_dev = 0;
	93	int error = -ENOMEM;
	94
	95	/* Get fstype. */
c8c57e84	96	requested_type = tomoyo_encode(type);
2106ccd9 TH	97	if (!requested_type)
	98	goto out;
	99	rtype.name = requested_type;
	100	tomoyo_fill_path_info(&rtype);
	101
	102	/* Get mount point. */
	103	requested_dir_name = tomoyo_realpath_from_path(dir);
	104	if (!requested_dir_name) {
	105	error = -ENOMEM;
	106	goto out;
	107	}
	108	rdir.name = requested_dir_name;
	109	tomoyo_fill_path_info(&rdir);
	110
	111	/* Compare fs name. */
b5bc60b4	112	if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT]) {
2106ccd9	113	/* dev_name is ignored. */
b5bc60b4 TH	114	} else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] \|\|
	115	type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] \|\|
	116	type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] \|\|
	117	type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]) {
2106ccd9	118	/* dev_name is ignored. */
b5bc60b4 TH	119	} else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND] \|\|
b5bc60b4 TH	120	type == tomoyo_mounts[TOMOYO_MOUNT_MOVE]) {
2106ccd9 TH	121	need_dev = -1; /* dev_name is a directory */
	122	} else {
	123	fstype = get_fs_type(type);
	124	if (!fstype) {
	125	error = -ENODEV;
	126	goto out;
	127	}
	128	if (fstype->fs_flags & FS_REQUIRES_DEV)
	129	/* dev_name is a block device file. */
	130	need_dev = 1;
	131	}
	132	if (need_dev) {
	133	/* Get mount point or device file. */
	134	if (kern_path(dev_name, LOOKUP_FOLLOW, &path)) {
	135	error = -ENOENT;
	136	goto out;
	137	}
	138	requested_dev_name = tomoyo_realpath_from_path(&path);
db5ca356	139	path_put(&path);
2106ccd9 TH	140	if (!requested_dev_name) {
	141	error = -ENOENT;
	142	goto out;
	143	}
	144	} else {
	145	/* Map dev_name to "<NULL>" if no dev_name given. */
	146	if (!dev_name)
	147	dev_name = "<NULL>";
c8c57e84	148	requested_dev_name = tomoyo_encode(dev_name);
2106ccd9 TH	149	if (!requested_dev_name) {
	150	error = -ENOMEM;
	151	goto out;
	152	}
	153	}
	154	rdev.name = requested_dev_name;
	155	tomoyo_fill_path_info(&rdev);
cf6e9a64 TH	156	r->param_type = TOMOYO_TYPE_MOUNT_ACL;
	157	r->param.mount.need_dev = need_dev;
	158	r->param.mount.dev = &rdev;
	159	r->param.mount.dir = &rdir;
	160	r->param.mount.type = &rtype;
	161	r->param.mount.flags = flags;
99a85259 TH	162	do {
	163	tomoyo_check_acl(r, tomoyo_check_mount_acl);
	164	error = tomoyo_audit_mount_log(r);
	165	} while (error == TOMOYO_RETRY_REQUEST);
2106ccd9 TH	166	out:
	167	kfree(requested_dev_name);
	168	kfree(requested_dir_name);
	169	if (fstype)
	170	put_filesystem(fstype);
	171	kfree(requested_type);
	172	return error;
	173	}
	174
2106ccd9 TH	175	/**
	176	* tomoyo_mount_permission - Check permission for mount() operation.
	177	*
	178	* @dev_name: Name of device file.
	179	* @path: Pointer to "struct path".
	180	* @type: Name of filesystem type. May be NULL.
	181	* @flags: Mount options.
	182	* @data_page: Optional data. May be NULL.
	183	*
	184	* Returns 0 on success, negative value otherwise.
	185	*/
b5bc60b4 TH	186	int tomoyo_mount_permission(char dev_name, struct path path,
	187	const char *type, unsigned long flags,
	188	void *data_page)
2106ccd9 TH	189	{
	190	struct tomoyo_request_info r;
	191	int error;
	192	int idx;
	193
57c2590f TH	194	if (tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_MOUNT)
57c2590f TH	195	== TOMOYO_CONFIG_DISABLED)
2106ccd9	196	return 0;
d795ef9e TH	197	if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
	198	flags &= ~MS_MGC_MSK;
	199	if (flags & MS_REMOUNT) {
b5bc60b4	200	type = tomoyo_mounts[TOMOYO_MOUNT_REMOUNT];
d795ef9e TH	201	flags &= ~MS_REMOUNT;
	202	}
	203	if (flags & MS_MOVE) {
b5bc60b4	204	type = tomoyo_mounts[TOMOYO_MOUNT_MOVE];
d795ef9e TH	205	flags &= ~MS_MOVE;
	206	}
	207	if (flags & MS_BIND) {
b5bc60b4	208	type = tomoyo_mounts[TOMOYO_MOUNT_BIND];
d795ef9e TH	209	flags &= ~MS_BIND;
	210	}
	211	if (flags & MS_UNBINDABLE) {
b5bc60b4	212	type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE];
d795ef9e TH	213	flags &= ~MS_UNBINDABLE;
	214	}
	215	if (flags & MS_PRIVATE) {
b5bc60b4	216	type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE];
d795ef9e TH	217	flags &= ~MS_PRIVATE;
	218	}
	219	if (flags & MS_SLAVE) {
b5bc60b4	220	type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE];
d795ef9e TH	221	flags &= ~MS_SLAVE;
	222	}
	223	if (flags & MS_SHARED) {
b5bc60b4	224	type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED];
d795ef9e TH	225	flags &= ~MS_SHARED;
d795ef9e TH	226	}
2106ccd9 TH	227	if (!type)
	228	type = "<NULL>";
	229	idx = tomoyo_read_lock();
	230	error = tomoyo_mount_acl(&r, dev_name, path, type, flags);
	231	tomoyo_read_unlock(idx);
	232	return error;
	233	}
	234
237ab459 TH	235	static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a,
	236	const struct tomoyo_acl_info *b)
	237	{
	238	const struct tomoyo_mount_acl p1 = container_of(a, typeof(p1), head);
	239	const struct tomoyo_mount_acl p2 = container_of(b, typeof(p2), head);
75093152 TH	240	return tomoyo_same_acl_head(&p1->head, &p2->head) &&
	241	tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) &&
	242	tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) &&
	243	tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) &&
	244	tomoyo_same_number_union(&p1->flags, &p2->flags);
237ab459 TH	245	}
237ab459 TH	246
2106ccd9	247	/**
e2bf6907	248	* tomoyo_write_mount - Write "struct tomoyo_mount_acl" list.
2106ccd9 TH	249	*
	250	* @data: String to parse.
	251	* @domain: Pointer to "struct tomoyo_domain_info".
	252	* @is_delete: True if it is a delete request.
	253	*
	254	* Returns 0 on success, negative value otherwise.
237ab459 TH	255	*
237ab459 TH	256	* Caller holds tomoyo_read_lock().
2106ccd9	257	*/
e2bf6907 TH	258	int tomoyo_write_mount(char data, struct tomoyo_domain_info domain,
e2bf6907 TH	259	const bool is_delete)
2106ccd9	260	{
2106ccd9 TH	261	struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL };
	262	int error = is_delete ? -ENOENT : -ENOMEM;
	263	char *w[4];
	264	if (!tomoyo_tokenize(data, w, sizeof(w)) \|\| !w[3][0])
	265	return -EINVAL;
	266	if (!tomoyo_parse_name_union(w[0], &e.dev_name) \|\|
	267	!tomoyo_parse_name_union(w[1], &e.dir_name) \|\|
	268	!tomoyo_parse_name_union(w[2], &e.fs_type) \|\|
	269	!tomoyo_parse_number_union(w[3], &e.flags))
	270	goto out;
237ab459 TH	271	error = tomoyo_update_domain(&e.head, sizeof(e), is_delete, domain,
237ab459 TH	272	tomoyo_same_mount_acl, NULL);
2106ccd9 TH	273	out:
	274	tomoyo_put_name_union(&e.dev_name);
	275	tomoyo_put_name_union(&e.dir_name);
	276	tomoyo_put_name_union(&e.fs_type);
	277	tomoyo_put_number_union(&e.flags);
	278	return error;
	279	}