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2015-10-15sd-netlink: refcount multicast groupsTom Gundersen
Track the number of matches installed for a given multicast group, and leave the group once no matches depend on it. In order to handle passed-in sockets that are already members of multicast groups we initialize the refcount based on the membership once we take over the socket. This way we will leave the socket in the state we found it once we finish with it. On kernels that do not fully support reading out the multicast group membership we fall back to never leaving any groups (as before).
2015-10-11sd-netlink: add support for subscribing to ROUTE messagesTom Gundersen
Also, explicitly don't support subscribing to GET or SET messages, as these will never be emitted by the kernel.
2015-10-11sd-netlink: rtnl - add route_get_{scope,tos,table,protocol}()Tom Gundersen
2015-10-05sd-rtnl: introduce new API to set the NL header flagsSusant Sahani
By default we set as NLM_F_CREATE | NLM_F_EXCL in sd_rtnl_message_new_link But incase of bridge we need to set NLM_F_REQUEST | NLM_F_ACK. If NLM_F_EXCL is set then we are unable to set the parameters. As bridge supports setting properties after creation not during creation.
2015-10-05sd-rtnl: sd-netlink: add support for bridge NL parametrsSusant Sahani
Rename rtnl_link_info_data_bridge_types to rtnl_link_bridge_management_types as they are of nested types of IFLA_AF_SPEC.
2015-09-09tree-wide: update empty-if coccinelle script to cover empty-while and moreLennart Poettering
Let's also clean up single-line while and for blocks.
2015-09-09tree-wide: drop {} from one-line if blocksLennart Poettering
Patch via coccinelle.
2015-09-09tree-wide: use coccinelle to patch a lot of code to use mfree()Lennart Poettering
This replaces this: free(p); p = NULL; by this: p = mfree(p); Change generated using coccinelle. Semantic patch is added to the sources.
2015-08-14tree-wide: generate EBADF when we get invalid fdsLennart Poettering
This is a follow-up to #907, and makes the same change for all our other public APIs.
2015-08-06libsystemd: fix RTNL_CONTAINER_DEPTH assertKarel Zak
The m->n_containers is index and has to be smaller than the array size.
2015-07-31tree-wide: introduce mfree()David Herrmann
Pretty trivial helper which wraps free() but returns NULL, so we can simplify this: free(foobar); foobar = NULL; to this: foobar = mfree(foobar);
2015-07-29sd-netlink: introduce api for new NL type NLA_FLAGSusant Sahani
2015-07-29sd-netlink: add support for new type NETLINK_TYPE_FLAGSusant Sahani
NETLINK_TYPE_FLAG is NLA_FLAG. This new type will be used in NLA_FLAG for example IFLA_VXLAN_GBP and IFLA_VXLAN_REMCSUM_NOPARTIAL
2015-07-29sd-netlink: add support for vxlan attributesSusant Sahani
2015-07-27sd-netlink: Add macvtap supportSusant Sahani
2015-07-24netlink-types: use consistent whitespace at EOLZbigniew Jędrzejewski-Szmek
Follow up for v222-124-g79e27dbcb1.
2015-07-23sd-netlink: add bridge NL paramsSusant Sahani
2015-07-22sd-netlink: add tunnel paramsSusant Sahani
2015-07-20sd-netlink: add tunnel NL parametersSusant Sahani
2015-07-14Merge commit 'refs/pull/436/head' of https://github.com/systemd/systemdDavid Herrmann
This merges: sd-netlink: respect attribute type flags ..fixing a conflict due to a typo fix.
2015-07-06treewide: fix typosTorstein Husebø
2015-06-30sd-netlink: respect attribute type flagsTom Gundersen
Though currently unused by us, netlink attribute types support embedding flags to indicate if the type is encoded in network byte-order and if it is a nested attribute. Read out these flags when parsing the message. We will now swap the byteorder in case it is non-native when reading out integers (though this is not needed by any of the types we currently support). We do not enforce the NESTED flag, as the kernel gets this wrong in many cases.
2015-06-28sd-netlink: message - remove unused next_rta_offset fieldTom Gundersen
This was a left-over from before we supported containers.
2015-06-28netlink: rework containersTom Gundersen
Instead of representing containers as several arrays, make a new netlink_container struct and keep one array of these structs. We also introduce netlink_attribute structs that in the future will hold meta-information about each atribute.
2015-06-28sd-netlink: make a couple of helper functions staticTom Gundersen
Also rename from rtnl_* to netlink_*.
2015-06-28sd-netlink: mark union containers as nestedTom Gundersen
This was an oversight, they are no different from regular containers in this respect.
2015-06-24sd-netlink: don't export internal type-system detailsDavid Herrmann
The kernel bonding layer allows passing an array of ARP IP targets as bond-configuration. Due to the weird implementation of arrays in netlink (which we haven't figure out a generic way to support, yet), we usually hard-code the supported array-sizes. However, this should not be exported from sd-netlink. Instead, make sure the caller just uses it's current hack of enumerating the types, and the sd-netlink core will have it's own list of supported array-sizes (to be removed in future extensions, btw!). If either does not match, we will just return a normal error. Note that we provide 2 constants for ARP_IP_TARGETS_MAX now. However, both have very different reasons: - the constant in netdev-bond.c is used to warn the user that the given number of targets might not be supported by the kernel (even though the kernel might increase that number at _any_ time) - the constant in sd-netlink is solely used due to us missing a proper array implementation. Once that's supported in the type-system, it can be removed without notice Last but not least, this patch turns the log_error() into a log_warning(). Given that the previous condition was off-by-one, anyway, it never hit at the right time. Thus, it was probably of no real use.
2015-06-24sd-netlink: don't treat NULL as root type-systemDavid Herrmann
Explicitly export the root type-system to the type-system callers. This avoids treating NULL as root, which for one really looks backwards (NULL is usually a leaf, not root), and secondly prevents us from properly debugging calling into non-nested types. Also rename the root to "type_system_root". Once we support more than rtnl, well will have to revisit that, anyway.
2015-06-24sd-netlink: don't treat type_system->count==0 as invalidDavid Herrmann
Empty type-systems are just fine. Avoid the nasty hack in union-type-systems that treat empty type-systems as invalid. Instead check for the actual types-array and make sure it's non-NULL (which is even true for empty type-systems, due to "empty_types" array).
2015-06-24sd-netlink: make sure the root-level type is nestedDavid Herrmann
In sd-netlink-message, we always guarantee that the currently selected type-system is non-NULL. Otherwise, we would be unable to parse any types in the current container level. Hence, this assertion must be true: message->container_type_system[m->n_containers] != NULL During message_new() we currently do not verify that this assertion is true. Instead, we blindly access nl_type->type_system and use it (which might be NULL for basic types and unions). Fix this, by explicitly checking that the root-level type is nested. Note that this is *not* a strict requirement of netlink, but it's a strict requirement for all message types we currently support. Furthermore, all the callers of message_new() already verify that only supported types are passed, therefore, this is a pure cosmetic check. However, it might be needed on the future, so make sure we don't trap into this once we change the type-system.
2015-06-24sd-netlink: drop NETLINK_TYPE_METADavid Herrmann
The NETLINK_TYPE_META pseudo-type is actually equivalent to an empty nested type. Drop it and define an empty type-system instead. This also has the nice side-effect that m->container_type_system[0] is never NULL (which has really nasty side-effects if you try to read attributes).
2015-06-24sd-netlink: turn 'max' into 'count' to support empty type-systemsDavid Herrmann
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.
2015-06-24sd-netlink: avoid casting size_t into intDavid Herrmann
size_t is usually 64bit and int 32bit on a 64bit machine. This probably does not matter for netlink message sizes, but nevertheless, avoid hard-coding it anywhere.
2015-06-24sd-netlink: make NLTypeSystem internalDavid Herrmann
Same as NLType, move NLTypeSystem into netlink-types.c and hide it from the outside. Provide an accessor function for the 'max' field that is used to allocate suitable array sizes. Note that this will probably be removed later on, anyway. Once we support bigger type-systems, it just seems impractical to allocate such big arrays for each container entry. An RBTree would probably do just fine.
2015-06-24sd-netlink: make NLType internalDavid Herrmann
If we extend NLType to support arrays and further extended types, we really want to avoid hard-coding the type-layout outside of netlink-types.c. We already avoid accessing nl_type->type_system outside of netlink-types.c, extend this to also avoid accessing any other fields. Provide accessor functions for nl_type->type and nl_type->size and then move NLType away from the type-system header. With this in place, follow-up patches can safely turn "type_system" and "type_system_union" into a real "union { }", and then add another type for arrays.
2015-06-24sd-netlink: don't access type->type_system[_union] directlyDavid Herrmann
Make sure we never access type->type_system or type->type_system_union directly. This is an implementation detail of the type-system and we should always use the accessors. Right now, they only exist for 2-level accesses (type-system to type-system). This patch introduces the 1-level accessors (type to type-system) and makes use of it. This patch makes sure the proper assertions are in place, so we never accidentally access sub-type-systems for non-nested/union types. Note that this places hard-asserts on the accessors. This should be fine, as we expect callers to only access sub type-systems if they *know* they're dealing with nested types.
2015-06-24sd-netlink: rename NLA_ to NETLINK_TYPE_David Herrmann
The NLA_ names are used to name real datatypes we extract out of netlink messages. The kernel has an internal enum with the same names (NLA_foobar), which is *NOT* binary compatible to our types. Furthermore, we support a different set of types than the kernel (as we try to treat some kernel peculiarities as our own types to simplify the API). Rename NLA_ to NETLINK_TYPE_ to make clear that this is our own set of types.
2015-06-13sd-netlink: socket - move some functions from main source fileTom Gundersen
2015-06-13sd-netlink: message - split up source fileTom Gundersen
Split netlink-socket.c and rtnl-message.c from netlink-message.c.
2015-06-13sd-netlink: drop the write-queueTom Gundersen
AF_NETLINK is not write-buffered, so this was actually never used.
2015-06-13sd-netlink: rename from sd-rtnlTom Gundersen