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sd-netlink: turn 'max' into 'count' to support empty type-systems

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Right now we store the maximum type-ID of a type-system. This prevents us
from creating empty type-systems. Store the "count" instead, which should
be treated as max+1.

Note that type_system_union_protocol_get_type_system() currently has a
nasty hack to treat empty type-systems as invalid. This might need some
modification later on as well.
This commit is contained in:
David Herrmann 2015-06-23 11:46:48 +02:00
parent 6c14ad61db
commit c1df8dee28
3 changed files with 38 additions and 38 deletions
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12
src/libsystemd/sd-netlink/netlink-message.c
View File

@ -753,7 +753,7 @@ int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short typ
r = rtnl_message_parse(m,
&m->rta_offset_tb[m->n_containers],
&m->rta_tb_size[m->n_containers],
type_system_get_max(type_system),
type_system_get_count(type_system),
container,
size);
if (r < 0) {
@ -811,17 +811,17 @@ int sd_netlink_message_get_errno(sd_netlink_message *m) {
int rtnl_message_parse(sd_netlink_message *m,
size_t **rta_offset_tb,
unsigned short *rta_tb_size,
int max,
int count,
struct rtattr *rta,
unsigned int rt_len) {
unsigned short type;
size_t *tb;
tb = new0(size_t, max + 1);
tb = new0(size_t, count);
if(!tb)
return -ENOMEM;
*rta_tb_size = max + 1;
*rta_tb_size = count;
for (; RTA_OK(rta, rt_len); rta = RTA_NEXT(rta, rt_len)) {
type = RTA_TYPE(rta);
@ -829,7 +829,7 @@ int rtnl_message_parse(sd_netlink_message *m,
/* if the kernel is newer than the headers we used
when building, we ignore out-of-range attributes
*/
if (type > max)
if (type >= count)
continue;
if (tb[type])
@ -889,7 +889,7 @@ int sd_netlink_message_rewind(sd_netlink_message *m) {
r = rtnl_message_parse(m,
&m->rta_offset_tb[m->n_containers],
&m->rta_tb_size[m->n_containers],
type_system_get_max(type_system),
type_system_get_count(type_system),
(struct rtattr*)((uint8_t*)NLMSG_DATA(m->hdr) + NLMSG_ALIGN(size)),
NLMSG_PAYLOAD(m->hdr, size));
if (r < 0)

62
src/libsystemd/sd-netlink/netlink-types.c
View File

@ -47,7 +47,7 @@ struct NLType {
};
struct NLTypeSystem {
uint16_t max;
uint16_t count;
const NLType *types;
};
@ -122,7 +122,7 @@ static const NLType rtnl_bond_arp_target_types[BOND_ARP_TARGETS_MAX + 1] = {
};
static const NLTypeSystem rtnl_bond_arp_type_system = {
.max = ELEMENTSOF(rtnl_bond_arp_target_types) - 1,
.count = ELEMENTSOF(rtnl_bond_arp_target_types),
.types = rtnl_bond_arp_target_types,
};
@ -223,37 +223,37 @@ static const char* const nl_union_link_info_data_table[_NL_UNION_LINK_INFO_DATA_
DEFINE_STRING_TABLE_LOOKUP(nl_union_link_info_data, NLUnionLinkInfoData);
static const NLTypeSystem rtnl_link_info_data_type_systems[_NL_UNION_LINK_INFO_DATA_MAX] = {
[NL_UNION_LINK_INFO_DATA_BOND] = { .max = ELEMENTSOF(rtnl_link_info_data_bond_types) - 1,
[NL_UNION_LINK_INFO_DATA_BOND] = { .count = ELEMENTSOF(rtnl_link_info_data_bond_types),
.types = rtnl_link_info_data_bond_types },
[NL_UNION_LINK_INFO_DATA_BRIDGE] = { .max = ELEMENTSOF(rtnl_link_info_data_bridge_types) - 1,
[NL_UNION_LINK_INFO_DATA_BRIDGE] = { .count = ELEMENTSOF(rtnl_link_info_data_bridge_types),
.types = rtnl_link_info_data_bridge_types },
[NL_UNION_LINK_INFO_DATA_VLAN] = { .max = ELEMENTSOF(rtnl_link_info_data_vlan_types) - 1,
[NL_UNION_LINK_INFO_DATA_VLAN] = { .count = ELEMENTSOF(rtnl_link_info_data_vlan_types),
.types = rtnl_link_info_data_vlan_types },
[NL_UNION_LINK_INFO_DATA_VETH] = { .max = ELEMENTSOF(rtnl_link_info_data_veth_types) - 1,
[NL_UNION_LINK_INFO_DATA_VETH] = { .count = ELEMENTSOF(rtnl_link_info_data_veth_types),
.types = rtnl_link_info_data_veth_types },
[NL_UNION_LINK_INFO_DATA_MACVLAN] = { .max = ELEMENTSOF(rtnl_link_info_data_macvlan_types) - 1,
[NL_UNION_LINK_INFO_DATA_MACVLAN] = { .count = ELEMENTSOF(rtnl_link_info_data_macvlan_types),
.types = rtnl_link_info_data_macvlan_types },
[NL_UNION_LINK_INFO_DATA_IPVLAN] = { .max = ELEMENTSOF(rtnl_link_info_data_ipvlan_types) - 1,
[NL_UNION_LINK_INFO_DATA_IPVLAN] = { .count = ELEMENTSOF(rtnl_link_info_data_ipvlan_types),
.types = rtnl_link_info_data_ipvlan_types },
[NL_UNION_LINK_INFO_DATA_VXLAN] = { .max = ELEMENTSOF(rtnl_link_info_data_vxlan_types) - 1,
[NL_UNION_LINK_INFO_DATA_VXLAN] = { .count = ELEMENTSOF(rtnl_link_info_data_vxlan_types),
.types = rtnl_link_info_data_vxlan_types },
[NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
[NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_iptun_types),
.types = rtnl_link_info_data_iptun_types },
[NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
[NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_ipgre_types),
.types = rtnl_link_info_data_ipgre_types },
[NL_UNION_LINK_INFO_DATA_IPGRETAP_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
[NL_UNION_LINK_INFO_DATA_IPGRETAP_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_ipgre_types),
.types = rtnl_link_info_data_ipgre_types },
[NL_UNION_LINK_INFO_DATA_IP6GRE_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
[NL_UNION_LINK_INFO_DATA_IP6GRE_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_ipgre_types),
.types = rtnl_link_info_data_ipgre_types },
[NL_UNION_LINK_INFO_DATA_IP6GRETAP_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_ipgre_types) - 1,
[NL_UNION_LINK_INFO_DATA_IP6GRETAP_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_ipgre_types),
.types = rtnl_link_info_data_ipgre_types },
[NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_iptun_types) - 1,
[NL_UNION_LINK_INFO_DATA_SIT_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_iptun_types),
.types = rtnl_link_info_data_iptun_types },
[NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_ipvti_types) - 1,
[NL_UNION_LINK_INFO_DATA_VTI_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_ipvti_types),
.types = rtnl_link_info_data_ipvti_types },
[NL_UNION_LINK_INFO_DATA_VTI6_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_ipvti_types) - 1,
[NL_UNION_LINK_INFO_DATA_VTI6_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_ipvti_types),
.types = rtnl_link_info_data_ipvti_types },
[NL_UNION_LINK_INFO_DATA_IP6TNL_TUNNEL] = { .max = ELEMENTSOF(rtnl_link_info_data_ip6tnl_types) - 1,
[NL_UNION_LINK_INFO_DATA_IP6TNL_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_ip6tnl_types),
.types = rtnl_link_info_data_ip6tnl_types },
};
@ -277,7 +277,7 @@ static const NLType rtnl_link_info_types[IFLA_INFO_MAX + 1] = {
};
static const NLTypeSystem rtnl_link_info_type_system = {
.max = ELEMENTSOF(rtnl_link_info_types) - 1,
.count = ELEMENTSOF(rtnl_link_info_types),
.types = rtnl_link_info_types,
};
@ -293,7 +293,7 @@ static const struct NLType rtnl_prot_info_bridge_port_types[IFLA_BRPORT_MAX + 1]
};
static const NLTypeSystem rtnl_prot_info_type_systems[AF_MAX] = {
[AF_BRIDGE] = { .max = ELEMENTSOF(rtnl_prot_info_bridge_port_types) - 1,
[AF_BRIDGE] = { .count = ELEMENTSOF(rtnl_prot_info_bridge_port_types),
.types = rtnl_prot_info_bridge_port_types },
};
@ -317,7 +317,7 @@ static const struct NLType rtnl_af_spec_inet6_types[IFLA_INET6_MAX + 1] = {
};
static const NLTypeSystem rtnl_af_spec_inet6_type_system = {
.max = ELEMENTSOF(rtnl_af_spec_inet6_types) - 1,
.count = ELEMENTSOF(rtnl_af_spec_inet6_types),
.types = rtnl_af_spec_inet6_types,
};
@ -326,7 +326,7 @@ static const NLType rtnl_af_spec_types[AF_MAX + 1] = {
};
static const NLTypeSystem rtnl_af_spec_type_system = {
.max = ELEMENTSOF(rtnl_af_spec_types) - 1,
.count = ELEMENTSOF(rtnl_af_spec_types),
.types = rtnl_af_spec_types,
};
@ -383,7 +383,7 @@ static const NLType rtnl_link_types[IFLA_MAX + 1 ] = {
};
static const NLTypeSystem rtnl_link_type_system = {
.max = ELEMENTSOF(rtnl_link_types) - 1,
.count = ELEMENTSOF(rtnl_link_types),
.types = rtnl_link_types,
};
@ -403,7 +403,7 @@ static const NLType rtnl_address_types[CONST_MAX(IFA_MAX, IFA_FLAGS) + 1] = {
};
static const NLTypeSystem rtnl_address_type_system = {
.max = ELEMENTSOF(rtnl_address_types) - 1,
.count = ELEMENTSOF(rtnl_address_types),
.types = rtnl_address_types,
};
@ -429,7 +429,7 @@ static const NLType rtnl_route_types[RTA_MAX + 1] = {
};
static const NLTypeSystem rtnl_route_type_system = {
.max = ELEMENTSOF(rtnl_route_types) - 1,
.count = ELEMENTSOF(rtnl_route_types),
.types = rtnl_route_types,
};
@ -445,7 +445,7 @@ static const NLType rtnl_neigh_types[NDA_MAX + 1] = {
};
static const NLTypeSystem rtnl_neigh_type_system = {
.max = ELEMENTSOF(rtnl_neigh_types) - 1,
.count = ELEMENTSOF(rtnl_neigh_types),
.types = rtnl_neigh_types,
};
@ -468,7 +468,7 @@ static const NLType rtnl_types[RTM_MAX + 1] = {
};
const NLTypeSystem rtnl_type_system = {
.max = ELEMENTSOF(rtnl_types) - 1,
.count = ELEMENTSOF(rtnl_types),
.types = rtnl_types,
};
@ -500,9 +500,9 @@ void type_get_type_system_union(const NLType *nl_type, const NLTypeSystemUnion *
*ret = nl_type->type_system_union;
}
uint16_t type_system_get_max(const NLTypeSystem *type_system) {
uint16_t type_system_get_count(const NLTypeSystem *type_system) {
assert(type_system);
return type_system->max;
return type_system->count;
}
int type_system_get_type(const NLTypeSystem *type_system, const NLType **ret, uint16_t type) {
@ -515,7 +515,7 @@ int type_system_get_type(const NLTypeSystem *type_system, const NLType **ret, ui
assert(type_system->types);
if (type > type_system->max)
if (type >= type_system->count)
return -EOPNOTSUPP;
nl_type = &type_system->types[type];
@ -589,7 +589,7 @@ int type_system_union_protocol_get_type_system(const NLTypeSystemUnion *type_sys
return -EOPNOTSUPP;
type_system = &type_system_union->type_systems[protocol];
if (type_system->max == 0)
if (type_system->count == 0)
return -EOPNOTSUPP;
*ret = type_system;

2
src/libsystemd/sd-netlink/netlink-types.h
View File

@ -58,7 +58,7 @@ size_t type_get_size(const NLType *type);
void type_get_type_system(const NLType *type, const NLTypeSystem **ret);
void type_get_type_system_union(const NLType *type, const NLTypeSystemUnion **ret);
uint16_t type_system_get_max(const NLTypeSystem *type_system);
uint16_t type_system_get_count(const NLTypeSystem *type_system);
int type_system_get_type(const NLTypeSystem *type_system, const NLType **ret, uint16_t type);
int type_system_get_type_system(const NLTypeSystem *type_system, const NLTypeSystem **ret, uint16_t type);
int type_system_get_type_system_union(const NLTypeSystem *type_system, const NLTypeSystemUnion **ret, uint16_t type);