C++ (Cpp) afs_parse_text_addrsの例

コード例 #1

ファイル: cell.c プロジェクト: AlexShiLucky/linux

/*
 * Set up a cell record and fill in its name, VL server address list and
 * allocate an anonymous key
 */
static struct afs_cell *afs_alloc_cell(struct afs_net *net,
				       const char *name, unsigned int namelen,
				       const char *addresses)
{
	struct afs_cell *cell;
	int i, ret;

	ASSERT(name);
	if (namelen == 0)
		return ERR_PTR(-EINVAL);
	if (namelen > AFS_MAXCELLNAME) {
		_leave(" = -ENAMETOOLONG");
		return ERR_PTR(-ENAMETOOLONG);
	}
	if (namelen == 5 && memcmp(name, "@cell", 5) == 0)
		return ERR_PTR(-EINVAL);

	_enter("%*.*s,%s", namelen, namelen, name, addresses);

	cell = kzalloc(sizeof(struct afs_cell), GFP_KERNEL);
	if (!cell) {
		_leave(" = -ENOMEM");
		return ERR_PTR(-ENOMEM);
	}

	cell->net = net;
	cell->name_len = namelen;
	for (i = 0; i < namelen; i++)
		cell->name[i] = tolower(name[i]);

	atomic_set(&cell->usage, 2);
	INIT_WORK(&cell->manager, afs_manage_cell);
	cell->flags = ((1 << AFS_CELL_FL_NOT_READY) |
		       (1 << AFS_CELL_FL_NO_LOOKUP_YET));
	INIT_LIST_HEAD(&cell->proc_volumes);
	rwlock_init(&cell->proc_lock);
	rwlock_init(&cell->vl_servers_lock);

	/* Fill in the VL server list if we were given a list of addresses to
	 * use.
	 */
	if (addresses) {
		struct afs_vlserver_list *vllist;

		vllist = afs_parse_text_addrs(net,
					      addresses, strlen(addresses), ':',
					      VL_SERVICE, AFS_VL_PORT);
		if (IS_ERR(vllist)) {
			ret = PTR_ERR(vllist);
			goto parse_failed;
		}

		rcu_assign_pointer(cell->vl_servers, vllist);
		cell->dns_expiry = TIME64_MAX;
		__clear_bit(AFS_CELL_FL_NO_LOOKUP_YET, &cell->flags);
	} else {
		cell->dns_expiry = ktime_get_real_seconds();
	}

	_leave(" = %p", cell);
	return cell;

parse_failed:
	if (ret == -EINVAL)
		printk(KERN_ERR "kAFS: bad VL server IP address\n");
	kfree(cell);
	_leave(" = %d", ret);
	return ERR_PTR(ret);
}

コード例 #2

ファイル: cell.c プロジェクト: avagin/linux

/*
 * Set up a cell record and fill in its name, VL server address list and
 * allocate an anonymous key
 */
static struct afs_cell *afs_alloc_cell(struct afs_net *net,
				       const char *name, unsigned int namelen,
				       const char *addresses)
{
	struct afs_vlserver_list *vllist;
	struct afs_cell *cell;
	int i, ret;

	ASSERT(name);
	if (namelen == 0)
		return ERR_PTR(-EINVAL);
	if (namelen > AFS_MAXCELLNAME) {
		_leave(" = -ENAMETOOLONG");
		return ERR_PTR(-ENAMETOOLONG);
	}
	if (namelen == 5 && memcmp(name, "@cell", 5) == 0)
		return ERR_PTR(-EINVAL);

	_enter("%*.*s,%s", namelen, namelen, name, addresses);

	cell = kzalloc(sizeof(struct afs_cell), GFP_KERNEL);
	if (!cell) {
		_leave(" = -ENOMEM");
		return ERR_PTR(-ENOMEM);
	}

	cell->net = net;
	cell->name_len = namelen;
	for (i = 0; i < namelen; i++)
		cell->name[i] = tolower(name[i]);

	atomic_set(&cell->usage, 2);
	INIT_WORK(&cell->manager, afs_manage_cell);
	INIT_LIST_HEAD(&cell->proc_volumes);
	rwlock_init(&cell->proc_lock);
	rwlock_init(&cell->vl_servers_lock);

	/* Provide a VL server list, filling it in if we were given a list of
	 * addresses to use.
	 */
	if (addresses) {
		vllist = afs_parse_text_addrs(net,
					      addresses, strlen(addresses), ':',
					      VL_SERVICE, AFS_VL_PORT);
		if (IS_ERR(vllist)) {
			ret = PTR_ERR(vllist);
			goto parse_failed;
		}

		vllist->source = DNS_RECORD_FROM_CONFIG;
		vllist->status = DNS_LOOKUP_NOT_DONE;
		cell->dns_expiry = TIME64_MAX;
	} else {
		ret = -ENOMEM;
		vllist = afs_alloc_vlserver_list(0);
		if (!vllist)
			goto error;
		vllist->source = DNS_RECORD_UNAVAILABLE;
		vllist->status = DNS_LOOKUP_NOT_DONE;
		cell->dns_expiry = ktime_get_real_seconds();
	}

	rcu_assign_pointer(cell->vl_servers, vllist);

	cell->dns_source = vllist->source;
	cell->dns_status = vllist->status;
	smp_store_release(&cell->dns_lookup_count, 1); /* vs source/status */

	_leave(" = %p", cell);
	return cell;

parse_failed:
	if (ret == -EINVAL)
		printk(KERN_ERR "kAFS: bad VL server IP address\n");
error:
	kfree(cell);
	_leave(" = %d", ret);
	return ERR_PTR(ret);
}