This patchset completes netns support, by disabling debugfs entries when not in the default name space, and correctly handling interface stack loops when the parent is in a different name space.
It additionally adds netlink support for most of the information found in debugfs, and is netns aware.
This patchset is based on Andrews v7 series as of May 7th, with the following changes of Sven and myself:
* rebase on current master * fix VID output in TT+claim table * fix kerneldoc for batadv_bla_claim_dump* functions * fix -ENODEV return in batadv_bla_claim_dump * added support for bla backbone table * add own TTVN to mesh_info (required for global translation table) * add own group id to mesh_info (required for bla claim/backbone table) * fix soft_iface reference leak when dumping the claim table * fix function parameter alignments * fix includes
it applies on master plus the following two patches applied:
* batman-adv: fix returned error in batadv_netlink_tp_meter_cancel * batman-adv: remove unused vid local variable in tt seq print
We have tested the setup in our VMs and verified functionality of the provided tables, including big TT tables and bridge loop avoidance.
Corresponding batctl patches will be sent separately.
Cheers, Simon
Andrew Lunn (5): batman-adv: Handle parent interfaces in a different netns batman-adv: Suppress debugfs entries for netns's batman-adv: add B.A.T.M.A.N. Dump gateways via netlink batman-adv: add B.A.T.M.A.N. Dump BLA claims via netlink batman-adv: Indicate netlink socket can be used with netns.
Matthias Schiffer (6): batman-adv: netlink: add routing_algo query batman-adv: netlink: hardif query batman-adv: netlink: add translation table query batman-adv: netlink: add originator and neighbor table queries batman-adv: add B.A.T.M.A.N. IV bat_{orig, neigh}_dump implementations batman-adv: add B.A.T.M.A.N. V bat_{orig, neigh}_dump implementations
Simon Wunderlich (1): batman-adv: add backbone table netlink support
Sven Eckelmann (2): batman-adv: Provide TTVN in the mesh_info netlink msg batman-adv: Provide bla group in the mesh_info netlink msg
compat-include/linux/netlink.h | 18 ++ compat.h | 7 + include/uapi/linux/batman_adv.h | 94 ++++++++ net/batman-adv/bat_algo.c | 68 ++++++ net/batman-adv/bat_algo.h | 3 + net/batman-adv/bat_iv_ogm.c | 362 +++++++++++++++++++++++++++++++ net/batman-adv/bat_v.c | 337 +++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.c | 333 +++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.h | 17 +- net/batman-adv/debugfs.c | 18 ++ net/batman-adv/gateway_client.c | 148 +++++++++++++ net/batman-adv/gateway_client.h | 2 + net/batman-adv/hard-interface.c | 50 ++++- net/batman-adv/netlink.c | 217 ++++++++++++++++++- net/batman-adv/netlink.h | 6 + net/batman-adv/originator.c | 160 ++++++++++++++ net/batman-adv/originator.h | 4 + net/batman-adv/packet.h | 36 ---- net/batman-adv/translation-table.c | 377 +++++++++++++++++++++++++++++++++ net/batman-adv/translation-table.h | 4 + net/batman-adv/types.h | 9 + 21 files changed, 2222 insertions(+), 48 deletions(-)
From: Andrew Lunn andrew@lunn.ch
batman-adv tries to prevent the user from placing a batX soft interface into another batman mesh as a hard interface. It does this by walking up the devices list of parents and ensures they are all none batX interfaces. iflink can point to an interface in a different namespace, so also retrieve the parents name space when finding the parent and use it when doing the comparison.
Signed-off-by: Andrew Lunn andrew@lunn.ch [sven@narfation.org: Fix alignments, simplify parent netns retrieval] Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- compat.h | 7 ++++++ net/batman-adv/hard-interface.c | 50 +++++++++++++++++++++++++++++++++++------ 2 files changed, 50 insertions(+), 7 deletions(-)
diff --git a/compat.h b/compat.h index 7d5c8b6..fc78948 100644 --- a/compat.h +++ b/compat.h @@ -146,6 +146,13 @@ static int __batadv_interface_kill_vid(struct net_device *dev, __be16 proto,\
#endif /* < KERNEL_VERSION(3, 15, 0) */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0) + +/* WARNING for batadv_getlink_net */ +#define get_link_net get_xstats_size || 1 || netdev->rtnl_link_ops->get_xstats_size + +#endif /* < KERNEL_VERSION(4, 0, 0) */ + #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
#define IFF_NO_QUEUE 0; dev->tx_queue_len = 0 diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index 6689656..08e0cd4 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -36,6 +36,8 @@ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/workqueue.h> +#include <net/net_namespace.h> +#include <net/rtnetlink.h>
#include "bridge_loop_avoidance.h" #include "debugfs.h" @@ -84,25 +86,55 @@ out: }
/** + * batadv_getlink_net - return link net namespace (of use fallback) + * @netdev: net_device to check + * @fallback_net: return in case get_link_net is not available for @netdev + * + * Return: result of rtnl_link_ops->get_link_net or @fallback_net + */ +static const struct net *batadv_getlink_net(const struct net_device *netdev, + const struct net *fallback_net) +{ + if (!netdev->rtnl_link_ops) + return fallback_net; + + if (!netdev->rtnl_link_ops->get_link_net) + return fallback_net; + + return netdev->rtnl_link_ops->get_link_net(netdev); +} + +/** * batadv_mutual_parents - check if two devices are each others parent - * @dev1: 1st net_device - * @dev2: 2nd net_device + * @dev1: 1st net dev + * @net1: 1st devices netns + * @dev2: 2nd net dev + * @net2: 2nd devices netns * * veth devices come in pairs and each is the parent of the other! * * Return: true if the devices are each others parent, otherwise false */ static bool batadv_mutual_parents(const struct net_device *dev1, - const struct net_device *dev2) + const struct net *net1, + const struct net_device *dev2, + const struct net *net2) { int dev1_parent_iflink = dev_get_iflink(dev1); int dev2_parent_iflink = dev_get_iflink(dev2); + const struct net *dev1_parent_net; + const struct net *dev2_parent_net; + + dev1_parent_net = batadv_getlink_net(dev1, net1); + dev2_parent_net = batadv_getlink_net(dev2, net2);
if (!dev1_parent_iflink || !dev2_parent_iflink) return false;
return (dev1_parent_iflink == dev2->ifindex) && - (dev2_parent_iflink == dev1->ifindex); + (dev2_parent_iflink == dev1->ifindex) && + net_eq(dev1_parent_net, net2) && + net_eq(dev2_parent_net, net1); }
/** @@ -120,8 +152,9 @@ static bool batadv_mutual_parents(const struct net_device *dev1, */ static bool batadv_is_on_batman_iface(const struct net_device *net_dev) { - struct net_device *parent_dev; struct net *net = dev_net(net_dev); + struct net_device *parent_dev; + const struct net *parent_net; bool ret;
/* check if this is a batman-adv mesh interface */ @@ -133,13 +166,16 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev) dev_get_iflink(net_dev) == net_dev->ifindex) return false;
+ parent_net = batadv_getlink_net(net_dev, net); + /* recurse over the parent device */ - parent_dev = __dev_get_by_index(net, dev_get_iflink(net_dev)); + parent_dev = __dev_get_by_index((struct net *)parent_net, + dev_get_iflink(net_dev)); /* if we got a NULL parent_dev there is something broken.. */ if (WARN(!parent_dev, "Cannot find parent device")) return false;
- if (batadv_mutual_parents(net_dev, parent_dev)) + if (batadv_mutual_parents(net_dev, net, parent_dev, parent_net)) return false;
ret = batadv_is_on_batman_iface(parent_dev);
From: Andrew Lunn andrew@lunn.ch
Debugfs is not netns aware. It thus has problems when the same interface name exists in multiple network name spaces.
Work around this by not creating entries for interfaces in name spaces other than the default name space. This means meshes in network namespaces cannot be managed via debugfs, but there will soon be a netlink interface which is netns aware.
Signed-off-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- net/batman-adv/debugfs.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c index 1d68b6e..b4ffba7 100644 --- a/net/batman-adv/debugfs.c +++ b/net/batman-adv/debugfs.c @@ -31,6 +31,7 @@ #include <linux/stddef.h> #include <linux/stringify.h> #include <linux/sysfs.h> +#include <net/net_namespace.h>
#include "bat_algo.h" #include "bridge_loop_avoidance.h" @@ -305,12 +306,16 @@ void batadv_debugfs_destroy(void) */ int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface) { + struct net *net = dev_net(hard_iface->net_dev); struct batadv_debuginfo **bat_debug; struct dentry *file;
if (!batadv_debugfs) goto out;
+ if (net != &init_net) + return 0; + hard_iface->debug_dir = debugfs_create_dir(hard_iface->net_dev->name, batadv_debugfs); if (!hard_iface->debug_dir) @@ -341,6 +346,11 @@ out: */ void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface) { + struct net *net = dev_net(hard_iface->net_dev); + + if (net != &init_net) + return; + if (batadv_debugfs) { debugfs_remove_recursive(hard_iface->debug_dir); hard_iface->debug_dir = NULL; @@ -351,11 +361,15 @@ int batadv_debugfs_add_meshif(struct net_device *dev) { struct batadv_priv *bat_priv = netdev_priv(dev); struct batadv_debuginfo **bat_debug; + struct net *net = dev_net(dev); struct dentry *file;
if (!batadv_debugfs) goto out;
+ if (net != &init_net) + return 0; + bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs); if (!bat_priv->debug_dir) goto out; @@ -392,6 +406,10 @@ out: void batadv_debugfs_del_meshif(struct net_device *dev) { struct batadv_priv *bat_priv = netdev_priv(dev); + struct net *net = dev_net(dev); + + if (net != &init_net) + return;
batadv_debug_log_cleanup(bat_priv);
From: Matthias Schiffer mschiffer@universe-factory.net
BATADV_CMD_GET_ROUTING_ALGOS is used to get the list of supported routing algorithms.
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch [sven.eckelmann@open-mesh.com: Reduce the number of changes to BATADV_CMD_GET_ROUTING_ALGOS, fix includes] Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- compat-include/linux/netlink.h | 18 +++++++++++ include/uapi/linux/batman_adv.h | 2 ++ net/batman-adv/bat_algo.c | 68 +++++++++++++++++++++++++++++++++++++++++ net/batman-adv/bat_algo.h | 3 ++ net/batman-adv/netlink.c | 9 +++++- net/batman-adv/netlink.h | 3 ++ 6 files changed, 102 insertions(+), 1 deletion(-)
diff --git a/compat-include/linux/netlink.h b/compat-include/linux/netlink.h index eb5b7f4..4f2185d 100644 --- a/compat-include/linux/netlink.h +++ b/compat-include/linux/netlink.h @@ -24,6 +24,24 @@ #include <linux/version.h> #include_next <linux/netlink.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 0) + +#include <net/scm.h> + +struct batadv_netlink_skb_parms { + struct ucred creds; /* Skb credentials */ + union { + __u32 portid; + __u32 pid; + }; + __u32 dst_group; +}; + +#undef NETLINK_CB +#define NETLINK_CB(skb) (*(struct batadv_netlink_skb_parms *)&((skb)->cb)) + +#endif /* < KERNEL_VERSION(3, 7, 0) */ + #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
#include_next <net/netlink.h> diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index acb72f8..297a04d 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -73,6 +73,7 @@ enum batadv_nl_attrs { * @BATADV_CMD_GET_MESH_INFO: Query basic information about batman-adv device * @BATADV_CMD_TP_METER: Start a tp meter session * @BATADV_CMD_TP_METER_CANCEL: Cancel a tp meter session + * @BATADV_CMD_GET_ROUTING_ALGOS: Query the list of routing algorithms. * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -81,6 +82,7 @@ enum batadv_nl_commands { BATADV_CMD_GET_MESH_INFO, BATADV_CMD_TP_METER, BATADV_CMD_TP_METER_CANCEL, + BATADV_CMD_GET_ROUTING_ALGOS, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/bat_algo.c b/net/batman-adv/bat_algo.c index 610d4de..540b3e0 100644 --- a/net/batman-adv/bat_algo.c +++ b/net/batman-adv/bat_algo.c @@ -20,12 +20,18 @@ #include <linux/errno.h> #include <linux/list.h> #include <linux/moduleparam.h> +#include <linux/netlink.h> #include <linux/printk.h> #include <linux/seq_file.h> +#include <linux/skbuff.h> #include <linux/stddef.h> #include <linux/string.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <uapi/linux/batman_adv.h>
#include "bat_algo.h" +#include "netlink.h"
char batadv_routing_algo[20] = "BATMAN_IV"; static struct hlist_head batadv_algo_list; @@ -138,3 +144,65 @@ static struct kparam_string batadv_param_string_ra = {
module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra, 0644); + +/** + * batadv_algo_dump_entry - fill in information about one supported routing + * algorithm + * @msg: netlink message to be sent back + * @portid: Port to reply to + * @seq: Sequence number of message + * @bat_algo_ops: Algorithm to be dumped + * + * Return: Error number, or 0 on success + */ +static int batadv_algo_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_algo_ops *bat_algo_ops) +{ + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, BATADV_CMD_GET_ROUTING_ALGOS); + if (!hdr) + return -EMSGSIZE; + + if (nla_put_string(msg, BATADV_ATTR_ALGO_NAME, bat_algo_ops->name)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_algo_dump - fill in information about supported routing + * algorithms + * @msg: netlink message to be sent back + * @cb: Parameters to the netlink request + * + * Return: Length of reply message. + */ +int batadv_algo_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + int portid = NETLINK_CB(cb->skb).portid; + struct batadv_algo_ops *bat_algo_ops; + int skip = cb->args[0]; + int i = 0; + + hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) { + if (i++ < skip) + continue; + + if (batadv_algo_dump_entry(msg, portid, cb->nlh->nlmsg_seq, + bat_algo_ops)) { + i--; + break; + } + } + + cb->args[0] = i; + + return msg->len; +} diff --git a/net/batman-adv/bat_algo.h b/net/batman-adv/bat_algo.h index 860d773..3b5b69c 100644 --- a/net/batman-adv/bat_algo.h +++ b/net/batman-adv/bat_algo.h @@ -22,7 +22,9 @@
#include <linux/types.h>
+struct netlink_callback; struct seq_file; +struct sk_buff;
extern char batadv_routing_algo[]; extern struct list_head batadv_hardif_list; @@ -31,5 +33,6 @@ void batadv_algo_init(void); int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops); int batadv_algo_select(struct batadv_priv *bat_priv, char *name); int batadv_algo_seq_print_text(struct seq_file *seq, void *offset); +int batadv_algo_dump(struct sk_buff *msg, struct netlink_callback *cb);
#endif /* _NET_BATMAN_ADV_BAT_ALGO_H_ */ diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index c25bbb8..ea3f4a2 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -32,13 +32,14 @@ #include <net/netlink.h> #include <uapi/linux/batman_adv.h>
+#include "bat_algo.h" #include "hard-interface.h" #include "soft-interface.h" #include "tp_meter.h"
struct sk_buff;
-static struct genl_family batadv_netlink_family = { +struct genl_family batadv_netlink_family = { .id = GENL_ID_GENERATE, .hdrsize = 0, .name = BATADV_NL_NAME, @@ -399,6 +400,12 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .doit = batadv_netlink_tp_meter_cancel, }, + { + .cmd = BATADV_CMD_GET_ROUTING_ALGOS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_algo_dump, + }, };
/** diff --git a/net/batman-adv/netlink.h b/net/batman-adv/netlink.h index 945653a..b399f49 100644 --- a/net/batman-adv/netlink.h +++ b/net/batman-adv/netlink.h @@ -21,6 +21,7 @@ #include "main.h"
#include <linux/types.h> +#include <net/genetlink.h>
void batadv_netlink_register(void); void batadv_netlink_unregister(void); @@ -29,4 +30,6 @@ int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, u8 result, u32 test_time, u64 total_bytes, u32 cookie);
+extern struct genl_family batadv_netlink_family; + #endif /* _NET_BATMAN_ADV_NETLINK_H_ */
From: Matthias Schiffer mschiffer@universe-factory.net
BATADV_CMD_GET_HARDIFS will return the list of hardifs (including index, name and MAC address) of all hardifs for a given softif.
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch [sven.eckelmann@open-mesh.com: Reduce the number of changes to BATADV_CMD_GET_HARDIFS, add policy for attributes] Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 4 ++ net/batman-adv/netlink.c | 128 +++++++++++++++++++++++++++++++++++++++- 2 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 297a04d..9ac9080 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -40,6 +40,7 @@ * @BATADV_ATTR_TPMETER_BYTES: amount of acked bytes during run * @BATADV_ATTR_TPMETER_COOKIE: session cookie to match tp_meter session * @BATADV_ATTR_PAD: attribute used for padding for 64-bit alignment + * @BATADV_ATTR_ACTIVE: Flag indicating if the hard interface is active * @__BATADV_ATTR_AFTER_LAST: internal use * @NUM_BATADV_ATTR: total number of batadv_nl_attrs available * @BATADV_ATTR_MAX: highest attribute number currently defined @@ -60,6 +61,7 @@ enum batadv_nl_attrs { BATADV_ATTR_TPMETER_BYTES, BATADV_ATTR_TPMETER_COOKIE, BATADV_ATTR_PAD, + BATADV_ATTR_ACTIVE, /* add attributes above here, update the policy in netlink.c */ __BATADV_ATTR_AFTER_LAST, NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST, @@ -74,6 +76,7 @@ enum batadv_nl_attrs { * @BATADV_CMD_TP_METER: Start a tp meter session * @BATADV_CMD_TP_METER_CANCEL: Cancel a tp meter session * @BATADV_CMD_GET_ROUTING_ALGOS: Query the list of routing algorithms. + * @BATADV_CMD_GET_HARDIFS: Query list of hard interfaces * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -83,6 +86,7 @@ enum batadv_nl_commands { BATADV_CMD_TP_METER, BATADV_CMD_TP_METER_CANCEL, BATADV_CMD_GET_ROUTING_ALGOS, + BATADV_CMD_GET_HARDIFS, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index ea3f4a2..2e568d4 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -26,10 +26,14 @@ #include <linux/netdevice.h> #include <linux/netlink.h> #include <linux/printk.h> +#include <linux/rculist.h> +#include <linux/rcupdate.h> +#include <linux/skbuff.h> #include <linux/stddef.h> #include <linux/types.h> #include <net/genetlink.h> #include <net/netlink.h> +#include <net/sock.h> #include <uapi/linux/batman_adv.h>
#include "bat_algo.h" @@ -37,8 +41,6 @@ #include "soft-interface.h" #include "tp_meter.h"
-struct sk_buff; - struct genl_family batadv_netlink_family = { .id = GENL_ID_GENERATE, .hdrsize = 0, @@ -70,9 +72,25 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 }, [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 }, [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 }, + [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG }, };
/** + * batadv_netlink_get_ifindex - Extract an interface index from a message + * @nlh: Message header + * @attrtype: Attribute which holds an interface index + * + * Return: interface index, or 0. + */ +static int +batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype) +{ + struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype); + + return attr ? nla_get_u32(attr) : 0; +} + +/** * batadv_netlink_mesh_info_put - fill in generic information about mesh * interface * @msg: netlink message to be sent back @@ -381,6 +399,106 @@ out: return ret; }
+/** + * batadv_netlink_dump_hardif_entry - Dump one hard interface into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @hard_iface: Hard interface to dump + * + * Return: error code, or 0 on success + */ +static int +batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *hard_iface) +{ + struct net_device *net_dev = hard_iface->net_dev; + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_HARDIFS); + if (!hdr) + return -EMSGSIZE; + + if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, + net_dev->ifindex) || + nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, + net_dev->name) || + nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN, + net_dev->dev_addr)) + goto nla_put_failure; + + if (hard_iface->if_status == BATADV_IF_ACTIVE) { + if (nla_put_flag(msg, BATADV_ATTR_ACTIVE)) + goto nla_put_failure; + } + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_netlink_dump_hardifs - Dump all hard interface into a messages + * @msg: Netlink message to dump into + * @cb: Parameters from query + * + * Return: error code, or length of reply message on success + */ +static int +batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface; + struct batadv_hard_iface *hard_iface; + int ifindex; + int portid = NETLINK_CB(cb->skb).portid; + int seq = cb->nlh->nlmsg_seq; + int skip = cb->args[0]; + int i = 0; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, + BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface) + return -ENODEV; + + if (!batadv_softif_is_valid(soft_iface)) { + dev_put(soft_iface); + return -ENODEV; + } + + rcu_read_lock(); + + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->soft_iface != soft_iface) + continue; + + if (i++ < skip) + continue; + + if (batadv_netlink_dump_hardif_entry(msg, portid, seq, + hard_iface)) { + i--; + break; + } + } + + rcu_read_unlock(); + + dev_put(soft_iface); + + cb->args[0] = i; + + return msg->len; +} + static struct genl_ops batadv_netlink_ops[] = { { .cmd = BATADV_CMD_GET_MESH_INFO, @@ -406,6 +524,12 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_algo_dump, }, + { + .cmd = BATADV_CMD_GET_HARDIFS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_netlink_dump_hardifs, + }, };
/**
From: Matthias Schiffer mschiffer@universe-factory.net
This adds the commands BATADV_CMD_GET_TRANSTABLE_LOCAL and BATADV_CMD_GET_TRANSTABLE_GLOBAL, which correspond to the transtable_local and transtable_global debugfs files.
The batadv_tt_client_flags enum is moved to the UAPI to expose it as part of the netlink API.
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch [sven.eckelmann@open-mesh.com: add policy for attributes, fix includes] Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com [sw@simonwunderlich.de: fix VID attributes content] Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 56 ++++++ net/batman-adv/netlink.c | 23 ++- net/batman-adv/netlink.h | 3 + net/batman-adv/packet.h | 36 ---- net/batman-adv/translation-table.c | 377 +++++++++++++++++++++++++++++++++++++ net/batman-adv/translation-table.h | 4 + 6 files changed, 462 insertions(+), 37 deletions(-)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 9ac9080..1dbb321 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -23,6 +23,42 @@ #define BATADV_NL_MCAST_GROUP_TPMETER "tpmeter"
/** + * enum batadv_tt_client_flags - TT client specific flags + * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table + * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new + * update telling its new real location has not been received/sent yet + * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface. + * This information is used by the "AP Isolation" feature + * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This + * information is used by the Extended Isolation feature + * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table + * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has + * not been announced yet + * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept + * in the table for one more originator interval for consistency purposes + * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of + * the network but no nnode has already announced it + * + * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire. + * Bits from 8 to 15 are called _local flags_ because they are used for local + * computations only. + * + * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with + * the other nodes in the network. To achieve this goal these flags are included + * in the TT CRC computation. + */ +enum batadv_tt_client_flags { + BATADV_TT_CLIENT_DEL = (1 << 0), + BATADV_TT_CLIENT_ROAM = (1 << 1), + BATADV_TT_CLIENT_WIFI = (1 << 4), + BATADV_TT_CLIENT_ISOLA = (1 << 5), + BATADV_TT_CLIENT_NOPURGE = (1 << 8), + BATADV_TT_CLIENT_NEW = (1 << 9), + BATADV_TT_CLIENT_PENDING = (1 << 10), + BATADV_TT_CLIENT_TEMP = (1 << 11), +}; + +/** * enum batadv_nl_attrs - batman-adv netlink attributes * * @BATADV_ATTR_UNSPEC: unspecified attribute to catch errors @@ -41,6 +77,14 @@ * @BATADV_ATTR_TPMETER_COOKIE: session cookie to match tp_meter session * @BATADV_ATTR_PAD: attribute used for padding for 64-bit alignment * @BATADV_ATTR_ACTIVE: Flag indicating if the hard interface is active + * @BATADV_ATTR_TT_ADDRESS: Client MAC address + * @BATADV_ATTR_TT_TTVN: Translation table version + * @BATADV_ATTR_TT_LAST_TTVN: Previous translation table version + * @BATADV_ATTR_TT_CRC32: CRC32 over translation table + * @BATADV_ATTR_TT_VID: VLAN ID + * @BATADV_ATTR_TT_FLAGS: Translation table client flags + * @BATADV_ATTR_FLAG_BEST: Flags indicating entry is the best + * @BATADV_ATTR_LAST_SEEN_MSECS: Time in milliseconds since last seen * @__BATADV_ATTR_AFTER_LAST: internal use * @NUM_BATADV_ATTR: total number of batadv_nl_attrs available * @BATADV_ATTR_MAX: highest attribute number currently defined @@ -62,6 +106,14 @@ enum batadv_nl_attrs { BATADV_ATTR_TPMETER_COOKIE, BATADV_ATTR_PAD, BATADV_ATTR_ACTIVE, + BATADV_ATTR_TT_ADDRESS, + BATADV_ATTR_TT_TTVN, + BATADV_ATTR_TT_LAST_TTVN, + BATADV_ATTR_TT_CRC32, + BATADV_ATTR_TT_VID, + BATADV_ATTR_TT_FLAGS, + BATADV_ATTR_FLAG_BEST, + BATADV_ATTR_LAST_SEEN_MSECS, /* add attributes above here, update the policy in netlink.c */ __BATADV_ATTR_AFTER_LAST, NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST, @@ -77,6 +129,8 @@ enum batadv_nl_attrs { * @BATADV_CMD_TP_METER_CANCEL: Cancel a tp meter session * @BATADV_CMD_GET_ROUTING_ALGOS: Query the list of routing algorithms. * @BATADV_CMD_GET_HARDIFS: Query list of hard interfaces + * @BATADV_CMD_GET_TRANSTABLE_LOCAL: Query list of local translations + * @BATADV_CMD_GET_TRANSTABLE_GLOBAL Query list of global translations * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -87,6 +141,8 @@ enum batadv_nl_commands { BATADV_CMD_TP_METER_CANCEL, BATADV_CMD_GET_ROUTING_ALGOS, BATADV_CMD_GET_HARDIFS, + BATADV_CMD_GET_TRANSTABLE_LOCAL, + BATADV_CMD_GET_TRANSTABLE_GLOBAL, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 2e568d4..ba3ee9c 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -40,6 +40,7 @@ #include "hard-interface.h" #include "soft-interface.h" #include "tp_meter.h" +#include "translation-table.h"
struct genl_family batadv_netlink_family = { .id = GENL_ID_GENERATE, @@ -73,6 +74,14 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 }, [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 }, [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG }, + [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN }, + [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 }, + [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 }, + [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 }, + [BATADV_ATTR_TT_VID] = { .type = NLA_U16 }, + [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 }, + [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG }, + [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 }, };
/** @@ -82,7 +91,7 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { * * Return: interface index, or 0. */ -static int +int batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype) { struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype); @@ -530,6 +539,18 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_netlink_dump_hardifs, }, + { + .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_tt_local_dump, + }, + { + .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_tt_global_dump, + }, };
/** diff --git a/net/batman-adv/netlink.h b/net/batman-adv/netlink.h index b399f49..52eb162 100644 --- a/net/batman-adv/netlink.h +++ b/net/batman-adv/netlink.h @@ -23,8 +23,11 @@ #include <linux/types.h> #include <net/genetlink.h>
+struct nlmsghdr; + void batadv_netlink_register(void); void batadv_netlink_unregister(void); +int batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype);
int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst, u8 result, u32 test_time, u64 total_bytes, diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index 6b011ff..6afc0b8 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -129,42 +129,6 @@ enum batadv_tt_data_flags { };
/** - * enum batadv_tt_client_flags - TT client specific flags - * @BATADV_TT_CLIENT_DEL: the client has to be deleted from the table - * @BATADV_TT_CLIENT_ROAM: the client roamed to/from another node and the new - * update telling its new real location has not been received/sent yet - * @BATADV_TT_CLIENT_WIFI: this client is connected through a wifi interface. - * This information is used by the "AP Isolation" feature - * @BATADV_TT_CLIENT_ISOLA: this client is considered "isolated". This - * information is used by the Extended Isolation feature - * @BATADV_TT_CLIENT_NOPURGE: this client should never be removed from the table - * @BATADV_TT_CLIENT_NEW: this client has been added to the local table but has - * not been announced yet - * @BATADV_TT_CLIENT_PENDING: this client is marked for removal but it is kept - * in the table for one more originator interval for consistency purposes - * @BATADV_TT_CLIENT_TEMP: this global client has been detected to be part of - * the network but no nnode has already announced it - * - * Bits from 0 to 7 are called _remote flags_ because they are sent on the wire. - * Bits from 8 to 15 are called _local flags_ because they are used for local - * computations only. - * - * Bits from 4 to 7 - a subset of remote flags - are ensured to be in sync with - * the other nodes in the network. To achieve this goal these flags are included - * in the TT CRC computation. - */ -enum batadv_tt_client_flags { - BATADV_TT_CLIENT_DEL = BIT(0), - BATADV_TT_CLIENT_ROAM = BIT(1), - BATADV_TT_CLIENT_WIFI = BIT(4), - BATADV_TT_CLIENT_ISOLA = BIT(5), - BATADV_TT_CLIENT_NOPURGE = BIT(8), - BATADV_TT_CLIENT_NEW = BIT(9), - BATADV_TT_CLIENT_PENDING = BIT(10), - BATADV_TT_CLIENT_TEMP = BIT(11), -}; - -/** * enum batadv_vlan_flags - flags for the four MSB of any vlan ID field * @BATADV_VLAN_HAS_TAG: whether the field contains a valid vlan tag or not */ diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index d6add4c..2b3c682 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -35,20 +35,27 @@ #include <linux/list.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/rculist.h> #include <linux/rcupdate.h> #include <linux/seq_file.h> +#include <linux/skbuff.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/stddef.h> #include <linux/string.h> #include <linux/workqueue.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <net/sock.h> +#include <uapi/linux/batman_adv.h>
#include "bridge_loop_avoidance.h" #include "hard-interface.h" #include "hash.h" #include "log.h" #include "multicast.h" +#include "netlink.h" #include "originator.h" #include "packet.h" #include "soft-interface.h" @@ -1058,6 +1065,166 @@ out: return 0; }
+/** + * batadv_tt_local_dump_entry - Dump one TT local entry into a message + * @msg :Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @common: tt local & tt global common data + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_tt_common_entry *common) +{ + void *hdr; + struct batadv_softif_vlan *vlan; + struct batadv_tt_local_entry *local; + unsigned int last_seen_msecs; + u32 crc; + + local = container_of(common, struct batadv_tt_local_entry, common); + last_seen_msecs = jiffies_to_msecs(jiffies - local->last_seen); + + vlan = batadv_softif_vlan_get(bat_priv, common->vid); + if (!vlan) + return 0; + + crc = vlan->tt.crc; + + batadv_softif_vlan_put(vlan); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, + BATADV_CMD_GET_TRANSTABLE_LOCAL); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || + nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || + nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || + nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) + goto nla_put_failure; + + if (!(common->flags & BATADV_TT_CLIENT_NOPURGE)) { + if (nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs)) + goto nla_put_failure; + } + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_tt_local_dump_bucket - Dump one TT local bucket into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @head: Pointer to the list containing the local tt entries + * @idx_s: Number of entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_local_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct hlist_head *head, int *idx_s) +{ + struct batadv_tt_common_entry *common; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(common, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_tt_local_dump_entry(msg, portid, seq, bat_priv, + common)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + return 0; +} + +/** + * batadv_tt_local_dump - Dump TT local entries into a message + * @msg: Netlink message to dump into + * @cb: Parameters from query + * + * Return: Error code, or 0 on success + */ +int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + struct batadv_hashtable *hash; + struct hlist_head *head; + int ret; + int ifindex; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int portid = NETLINK_CB(cb->skb).portid; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hash = bat_priv->tt.local_hash; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_tt_local_dump_bucket(msg, portid, cb->nlh->nlmsg_seq, + bat_priv, head, &idx)) + break; + + bucket++; + } + + ret = msg->len; + + out: + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + cb->args[0] = bucket; + cb->args[1] = idx; + + return ret; +} + static void batadv_tt_local_set_pending(struct batadv_priv *bat_priv, struct batadv_tt_local_entry *tt_local_entry, @@ -1705,6 +1872,216 @@ out: }
/** + * batadv_tt_global_dump_subentry - Dump all TT local entries into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @common: tt local & tt global common data + * @orig: Originator node announcing a non-mesh client + * @best: Is the best originator for the TT entry + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_global_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_tt_common_entry *common, + struct batadv_tt_orig_list_entry *orig, + bool best) +{ + void *hdr; + struct batadv_orig_node_vlan *vlan; + u8 last_ttvn; + u32 crc; + + vlan = batadv_orig_node_vlan_get(orig->orig_node, + common->vid); + if (!vlan) + return 0; + + crc = vlan->tt.crc; + + batadv_orig_node_vlan_put(vlan); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, + BATADV_CMD_GET_TRANSTABLE_GLOBAL); + if (!hdr) + return -ENOBUFS; + + last_ttvn = atomic_read(&orig->orig_node->last_ttvn); + + if (nla_put(msg, BATADV_ATTR_TT_ADDRESS, ETH_ALEN, common->addr) || + nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, + orig->orig_node->orig) || + nla_put_u8(msg, BATADV_ATTR_TT_TTVN, orig->ttvn) || + nla_put_u8(msg, BATADV_ATTR_TT_LAST_TTVN, last_ttvn) || + nla_put_u32(msg, BATADV_ATTR_TT_CRC32, crc) || + nla_put_u16(msg, BATADV_ATTR_TT_VID, common->vid) || + nla_put_u32(msg, BATADV_ATTR_TT_FLAGS, common->flags)) + goto nla_put_failure; + + if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_tt_global_dump_entry - Dump one TT global entry into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @common: tt local & tt global common data + * @sub_s: Number of entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_tt_common_entry *common, int *sub_s) +{ + struct batadv_tt_orig_list_entry *orig_entry, *best_entry; + struct batadv_tt_global_entry *global; + struct hlist_head *head; + int sub = 0; + bool best; + + global = container_of(common, struct batadv_tt_global_entry, common); + best_entry = batadv_transtable_best_orig(bat_priv, global); + head = &global->orig_list; + + hlist_for_each_entry_rcu(orig_entry, head, list) { + if (sub++ < *sub_s) + continue; + + best = (orig_entry == best_entry); + + if (batadv_tt_global_dump_subentry(msg, portid, seq, common, + orig_entry, best)) { + *sub_s = sub - 1; + return -EMSGSIZE; + } + } + + *sub_s = 0; + return 0; +} + +/** + * batadv_tt_global_dump_bucket - Dump one TT local bucket into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @head: Pointer to the list containing the global tt entries + * @idx_s: Number of entries to skip + * @sub: Number of entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_tt_global_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct hlist_head *head, int *idx_s, int *sub) +{ + struct batadv_tt_common_entry *common; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(common, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_tt_global_dump_entry(msg, portid, seq, bat_priv, + common, sub)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + *sub = 0; + return 0; +} + +/** + * batadv_tt_global_dump - Dump TT global entries into a message + * @msg: Netlink message to dump into + * @cb: Parameters from query + * + * Return: Error code, or length of message on success + */ +int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + struct batadv_hashtable *hash; + struct hlist_head *head; + int ret; + int ifindex; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int sub = cb->args[2]; + int portid = NETLINK_CB(cb->skb).portid; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hash = bat_priv->tt.global_hash; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_tt_global_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, bat_priv, + head, &idx, &sub)) + break; + + bucket++; + } + + ret = msg->len; + + out: + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + cb->args[0] = bucket; + cb->args[1] = idx; + cb->args[2] = sub; + + return ret; +} + +/** * _batadv_tt_global_del_orig_entry - remove and free an orig_entry * @tt_global_entry: the global entry to remove the orig_entry from * @orig_entry: the orig entry to remove and free diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h index 7c7e2c0..4697af6 100644 --- a/net/batman-adv/translation-table.h +++ b/net/batman-adv/translation-table.h @@ -22,8 +22,10 @@
#include <linux/types.h>
+struct netlink_callback; struct net_device; struct seq_file; +struct sk_buff;
int batadv_tt_init(struct batadv_priv *bat_priv); bool batadv_tt_local_add(struct net_device *soft_iface, const u8 *addr, @@ -33,6 +35,8 @@ u16 batadv_tt_local_remove(struct batadv_priv *bat_priv, const char *message, bool roaming); int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset); int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset); +int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb); +int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb); void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, s32 match_vid, const char *message);
On Mon, May 23, 2016 at 05:59:36PM +0200, Simon Wunderlich wrote:
+static int +batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
struct batadv_priv *bat_priv,struct batadv_tt_common_entry *common)+{
[...]
- if (!(common->flags & BATADV_TT_CLIENT_NOPURGE)) {
if (nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,last_seen_msecs))goto nla_put_failure;- }
Unnecessary brackets here, maybe use '&&' to skip a layer of indention?
+int batadv_tt_local_dump(struct sk_buff *msg, struct netlink_callback *cb) +{
- struct net *net = sock_net(cb->skb->sk);
- struct net_device *soft_iface = NULL;
No need to set soft_iface to NULL.
+static int +batadv_tt_global_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
struct batadv_priv *bat_priv,struct batadv_tt_common_entry *common, int *sub_s)+{
- struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
- struct batadv_tt_global_entry *global;
- struct hlist_head *head;
- int sub = 0;
- bool best;
- global = container_of(common, struct batadv_tt_global_entry, common);
- best_entry = batadv_transtable_best_orig(bat_priv, global);
- head = &global->orig_list;
- hlist_for_each_entry_rcu(orig_entry, head, list) {
Either add an explicit rcu-lock or keep to the doc style to add a line in the kerneldoc about caller needing to hold it?
+int batadv_tt_global_dump(struct sk_buff *msg, struct netlink_callback *cb) +{
- struct net *net = sock_net(cb->skb->sk);
- struct net_device *soft_iface = NULL;
No need to set soft_iface to NULL.
Hi,
thanks a lot for your feedback.
On Thursday 26 May 2016 06:39:14 Linus Lüssing wrote:
On Mon, May 23, 2016 at 05:59:36PM +0200, Simon Wunderlich wrote:
+static int +batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
struct batadv_priv *bat_priv,struct batadv_tt_common_entry *common)+{
[...]
- if (!(common->flags & BATADV_TT_CLIENT_NOPURGE)) {
if (nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,last_seen_msecs))goto nla_put_failure;- }
Unnecessary brackets here, maybe use '&&' to skip a layer of indention?
I would disagree here. The { } braces make sense because it is not a simple (single) statement inside the outer if body. But I am partially on your side regarding the extra indent. But having both in one statement is also weird because one is a simple check and the other one is a function call with side effects. So I am not 100% sure at the moment and will leave this untouched for now. Maybe Simon wants to add it or I will think about it a little bit more about it.
I have added the other changes to my branch ecsv/netlink and will merge then when I have more time.
Kind regards, Sven
On Thu, May 26, 2016 at 10:30:15AM +0200, Sven Eckelmann wrote:
Hi,
thanks a lot for your feedback.
On Thursday 26 May 2016 06:39:14 Linus Lüssing wrote:
On Mon, May 23, 2016 at 05:59:36PM +0200, Simon Wunderlich wrote:
+static int +batadv_tt_local_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
struct batadv_priv *bat_priv,struct batadv_tt_common_entry *common)+{
[...]
- if (!(common->flags & BATADV_TT_CLIENT_NOPURGE)) {
if (nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,last_seen_msecs))goto nla_put_failure;- }
Unnecessary brackets here, maybe use '&&' to skip a layer of indention?
I would disagree here. The { } braces make sense because it is not a simple (single) statement inside the outer if body. But I am partially on your side regarding the extra indent. But having both in one statement is also weird because one is a simple check and the other one is a function call with side effects. So I am not 100% sure at the moment and will leave this untouched for now. Maybe Simon wants to add it or I will think about it a little bit more about it.
Although having both statements in the same check wouldn't change the semantics, I do agree that having a clear separation makes it easier to understand.
my 2 cents.
Cheers,
From: Sven Eckelmann sven@narfation.org
The TTVN is the main information for the debugging of translation table problems. It is therefore necessary when comparing the global translation tables.
Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- net/batman-adv/netlink.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index ba3ee9c..1fd184c 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -18,6 +18,7 @@ #include "netlink.h" #include "main.h"
+#include <linux/atomic.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/genetlink.h> @@ -121,7 +122,9 @@ batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface) nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) || nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) || nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN, - soft_iface->dev_addr)) + soft_iface->dev_addr) || + nla_put_u8(msg, BATADV_ATTR_TT_TTVN, + (u8)atomic_read(&bat_priv->tt.vn))) goto out;
primary_if = batadv_primary_if_get_selected(bat_priv);
From: Matthias Schiffer mschiffer@universe-factory.net
Add BATADV_CMD_GET_ORIGINATORS and BATADV_CMD_GET_NEIGHBORS commands, using handlers bat_orig_dump and bat_neigh_dump in batadv_algo_ops. Will always return -EOPNOTSUPP for now, as no implementations exist yet.
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 4 + net/batman-adv/netlink.c | 13 ++++ net/batman-adv/originator.c | 160 ++++++++++++++++++++++++++++++++++++++++ net/batman-adv/originator.h | 4 + net/batman-adv/types.h | 9 +++ 5 files changed, 190 insertions(+)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 1dbb321..f9a7874 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -131,6 +131,8 @@ enum batadv_nl_attrs { * @BATADV_CMD_GET_HARDIFS: Query list of hard interfaces * @BATADV_CMD_GET_TRANSTABLE_LOCAL: Query list of local translations * @BATADV_CMD_GET_TRANSTABLE_GLOBAL Query list of global translations + * @BATADV_CMD_GET_ORIGINATORS: Query list of originators + * @BATADV_CMD_GET_NEIGHBORS: Query list of neighbours * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -143,6 +145,8 @@ enum batadv_nl_commands { BATADV_CMD_GET_HARDIFS, BATADV_CMD_GET_TRANSTABLE_LOCAL, BATADV_CMD_GET_TRANSTABLE_GLOBAL, + BATADV_CMD_GET_ORIGINATORS, + BATADV_CMD_GET_NEIGHBORS, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 1fd184c..f4a720a 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -39,6 +39,7 @@
#include "bat_algo.h" #include "hard-interface.h" +#include "originator.h" #include "soft-interface.h" #include "tp_meter.h" #include "translation-table.h" @@ -554,6 +555,18 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_tt_global_dump, }, + { + .cmd = BATADV_CMD_GET_ORIGINATORS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_orig_dump, + }, + { + .cmd = BATADV_CMD_GET_NEIGHBORS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_hardif_neigh_dump, + }, };
/** diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 8ad17ad..da98134 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -28,11 +28,15 @@ #include <linux/list.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/rculist.h> #include <linux/seq_file.h> +#include <linux/skbuff.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/workqueue.h> +#include <net/sock.h> +#include <uapi/linux/batman_adv.h>
#include "bat_algo.h" #include "distributed-arp-table.h" @@ -42,8 +46,10 @@ #include "hash.h" #include "log.h" #include "multicast.h" +#include "netlink.h" #include "network-coding.h" #include "routing.h" +#include "soft-interface.h" #include "translation-table.h"
/* hash class keys */ @@ -721,6 +727,83 @@ int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset) }
/** + * batadv_hardif_neigh_dump - Dump to netlink the neighbor infos for a specific + * outgoing interface + * @msg: message to dump into + * @cb: parameters for the dump + * + * Return: 0 or error value + */ +int batadv_hardif_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct net_device *hard_iface = NULL; + struct batadv_hard_iface *hardif = BATADV_IF_DEFAULT; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + int ret; + int ifindex, hard_ifindex; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hard_ifindex = batadv_netlink_get_ifindex(cb->nlh, + BATADV_ATTR_HARD_IFINDEX); + if (hard_ifindex) { + hard_iface = dev_get_by_index(net, hard_ifindex); + if (hard_iface) + hardif = batadv_hardif_get_by_netdev(hard_iface); + + if (!hardif) { + ret = -ENODEV; + goto out; + } + + if (hardif->soft_iface != soft_iface) { + ret = -ENOENT; + goto out; + } + } + + if (!bat_priv->bat_algo_ops->bat_neigh_dump) { + ret = -EOPNOTSUPP; + goto out; + } + + bat_priv->bat_algo_ops->bat_neigh_dump(msg, cb, bat_priv, hardif); + + ret = msg->len; + + out: + if (hardif) + batadv_hardif_put(hardif); + if (hard_iface) + dev_put(hard_iface); + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + return ret; +} + +/** * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for * free after rcu grace period * @ref: kref pointer of the orig_ifinfo @@ -1316,6 +1399,83 @@ out: return 0; }
+/** + * batadv_orig_dump - Dump to netlink the originator infos for a specific + * outgoing interface + * @msg: message to dump into + * @cb: parameters for the dump + * + * Return: 0 or error value + */ +int batadv_orig_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct net_device *hard_iface = NULL; + struct batadv_hard_iface *hardif = BATADV_IF_DEFAULT; + struct batadv_priv *bat_priv; + struct batadv_hard_iface *primary_if = NULL; + int ret; + int ifindex, hard_ifindex; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + hard_ifindex = batadv_netlink_get_ifindex(cb->nlh, + BATADV_ATTR_HARD_IFINDEX); + if (hard_ifindex) { + hard_iface = dev_get_by_index(net, hard_ifindex); + if (hard_iface) + hardif = batadv_hardif_get_by_netdev(hard_iface); + + if (!hardif) { + ret = -ENODEV; + goto out; + } + + if (hardif->soft_iface != soft_iface) { + ret = -ENOENT; + goto out; + } + } + + if (!bat_priv->bat_algo_ops->bat_orig_dump) { + ret = -EOPNOTSUPP; + goto out; + } + + bat_priv->bat_algo_ops->bat_orig_dump(msg, cb, bat_priv, hardif); + + ret = msg->len; + + out: + if (hardif) + batadv_hardif_put(hardif); + if (hard_iface) + dev_put(hard_iface); + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + return ret; +} + int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, int max_if_num) { diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h index 566306b..ebc5618 100644 --- a/net/batman-adv/originator.h +++ b/net/batman-adv/originator.h @@ -31,7 +31,9 @@
#include "hash.h"
+struct netlink_callback; struct seq_file; +struct sk_buff;
bool batadv_compare_orig(const struct hlist_node *node, const void *data2); int batadv_originator_init(struct batadv_priv *bat_priv); @@ -61,6 +63,7 @@ batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, struct batadv_hard_iface *if_outgoing); void batadv_neigh_ifinfo_put(struct batadv_neigh_ifinfo *neigh_ifinfo);
+int batadv_hardif_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb); int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset);
struct batadv_orig_ifinfo * @@ -72,6 +75,7 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo);
int batadv_orig_seq_print_text(struct seq_file *seq, void *offset); +int batadv_orig_dump(struct sk_buff *msg, struct netlink_callback *cb); int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset); int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, int max_if_num); diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index a331e3a..63940b7 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -28,6 +28,7 @@ #include <linux/if_ether.h> #include <linux/kref.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/sched.h> /* for linux/wait.h */ #include <linux/spinlock.h> #include <linux/types.h> @@ -1405,7 +1406,9 @@ struct batadv_forw_packet { * better than neigh2 for their respective outgoing interface from the metric * prospective * @bat_neigh_print: print the single hop neighbor list (optional) + * @bat_neigh_dump: dump neighbors to a netlink socket * @bat_orig_print: print the originator table (optional) + * @bat_orig_dump: dump originators to a netlink socket * @bat_orig_free: free the resources allocated by the routing algorithm for an * orig_node object * @bat_orig_add_if: ask the routing algorithm to apply the needed changes to @@ -1433,9 +1436,15 @@ struct batadv_algo_ops { struct batadv_neigh_node *neigh2, struct batadv_hard_iface *if_outgoing2); void (*bat_neigh_print)(struct batadv_priv *priv, struct seq_file *seq); + void (*bat_neigh_dump)(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *priv, + struct batadv_hard_iface *hard_iface); /* orig_node handling API */ void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq, struct batadv_hard_iface *hard_iface); + void (*bat_orig_dump)(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *priv, + struct batadv_hard_iface *hard_iface); void (*bat_orig_free)(struct batadv_orig_node *orig_node); int (*bat_orig_add_if)(struct batadv_orig_node *orig_node, int max_if_num);
From: Matthias Schiffer mschiffer@universe-factory.net
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch [sven.eckelmann@open-mesh.com: Fix function parameter alignments, add policy for attributes, fix includes] Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 4 + net/batman-adv/bat_iv_ogm.c | 362 ++++++++++++++++++++++++++++++++++++++++ net/batman-adv/netlink.c | 2 + 3 files changed, 368 insertions(+)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index f9a7874..14fb529 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -85,6 +85,8 @@ enum batadv_tt_client_flags { * @BATADV_ATTR_TT_FLAGS: Translation table client flags * @BATADV_ATTR_FLAG_BEST: Flags indicating entry is the best * @BATADV_ATTR_LAST_SEEN_MSECS: Time in milliseconds since last seen + * @BATADV_ATTR_NEIGH_ADDRESS: Neighbour MAC address + * @BATADV_ATTR_TQ: TQ to neighbour * @__BATADV_ATTR_AFTER_LAST: internal use * @NUM_BATADV_ATTR: total number of batadv_nl_attrs available * @BATADV_ATTR_MAX: highest attribute number currently defined @@ -114,6 +116,8 @@ enum batadv_nl_attrs { BATADV_ATTR_TT_FLAGS, BATADV_ATTR_FLAG_BEST, BATADV_ATTR_LAST_SEEN_MSECS, + BATADV_ATTR_NEIGH_ADDRESS, + BATADV_ATTR_TQ, /* add attributes above here, update the policy in netlink.c */ __BATADV_ATTR_AFTER_LAST, NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST, diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index e2d8848..b953abb 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -35,6 +35,7 @@ #include <linux/list.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/pkt_sched.h> #include <linux/printk.h> #include <linux/random.h> @@ -48,12 +49,16 @@ #include <linux/string.h> #include <linux/types.h> #include <linux/workqueue.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <uapi/linux/batman_adv.h>
#include "bat_algo.h" #include "bitarray.h" #include "hard-interface.h" #include "hash.h" #include "log.h" +#include "netlink.h" #include "network-coding.h" #include "originator.h" #include "packet.h" @@ -1979,6 +1984,233 @@ next: }
/** + * batadv_iv_ogm_neigh_get_tq_avg - Get the TQ average for a neighbour on a + * given outgoing interface. + * @neigh_node: Neighbour of interest + * @if_outgoing: Outgoing interface of interest + * @tq_avg: Pointer of where to store the TQ average + * + * Return: False if no average TQ available, otherwise true. + */ +static bool +batadv_iv_ogm_neigh_get_tq_avg(struct batadv_neigh_node *neigh_node, + struct batadv_hard_iface *if_outgoing, + u8 *tq_avg) +{ + struct batadv_neigh_ifinfo *n_ifinfo; + + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); + if (!n_ifinfo) + return false; + + *tq_avg = n_ifinfo->bat_iv.tq_avg; + batadv_neigh_ifinfo_put(n_ifinfo); + + return true; +} + +/** + * batadv_iv_ogm_orig_dump_subentry - Dump an originator subentry into a + * message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + * @orig_node: Originator to dump + * @neigh_node: Single hops neighbour + * @best: Is the best originator + * + * Return: Error code, or 0 on success + */ +static int +batadv_iv_ogm_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct batadv_orig_node *orig_node, + struct batadv_neigh_node *neigh_node, + bool best) +{ + void *hdr; + u8 tq_avg; + unsigned int last_seen_msecs; + + last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen); + + if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node, if_outgoing, &tq_avg)) + return 0; + + if (if_outgoing != BATADV_IF_DEFAULT && + if_outgoing != neigh_node->if_incoming) + return 0; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, BATADV_CMD_GET_ORIGINATORS); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, + orig_node->orig) || + nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, + neigh_node->addr) || + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, + neigh_node->if_incoming->net_dev->ifindex) || + nla_put_u8(msg, BATADV_ATTR_TQ, tq_avg) || + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs)) + goto nla_put_failure; + + if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_iv_ogm_orig_dump_entry - Dump an originator entry into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + * @orig_node: Originator to dump + * @sub_s: Number of sub entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_iv_ogm_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct batadv_orig_node *orig_node, int *sub_s) +{ + struct batadv_neigh_node *neigh_node_best; + struct batadv_neigh_node *neigh_node; + int sub = 0; + bool best; + u8 tq_avg_best; + + neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing); + if (!neigh_node_best) + goto out; + + if (!batadv_iv_ogm_neigh_get_tq_avg(neigh_node_best, if_outgoing, + &tq_avg_best)) + goto out; + + if (tq_avg_best == 0) + goto out; + + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + if (sub++ < *sub_s) + continue; + + best = (neigh_node == neigh_node_best); + + if (batadv_iv_ogm_orig_dump_subentry(msg, portid, seq, + bat_priv, if_outgoing, + orig_node, neigh_node, + best)) { + batadv_neigh_node_put(neigh_node_best); + + *sub_s = sub - 1; + return -EMSGSIZE; + } + } + + out: + if (neigh_node_best) + batadv_neigh_node_put(neigh_node_best); + + *sub_s = 0; + return 0; +} + +/** + * batadv_iv_ogm_orig_dump_bucket - Dump an originator bucket into a + * message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + * @head: Bucket to be dumped + * @idx_s: Number of entries to be skipped + * @sub: Number of sub entries to be skipped + * + * Return: Error code, or 0 on success + */ +static int +batadv_iv_ogm_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct hlist_head *head, int *idx_s, int *sub) +{ + struct batadv_orig_node *orig_node; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_iv_ogm_orig_dump_entry(msg, portid, seq, bat_priv, + if_outgoing, orig_node, + sub)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + *sub = 0; + return 0; +} + +/** + * batadv_iv_ogm_orig_dump - Dump the originators into a message + * @msg: Netlink message to dump into + * @cb: Control block containing additional options + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + */ +static void +batadv_iv_ogm_orig_dump(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_hashtable *hash = bat_priv->orig_hash; + struct hlist_head *head; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int sub = cb->args[2]; + int portid = NETLINK_CB(cb->skb).portid; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_iv_ogm_orig_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, if_outgoing, head, + &idx, &sub)) + break; + + bucket++; + } + + cb->args[0] = bucket; + cb->args[1] = idx; + cb->args[2] = sub; +} + +/** * batadv_iv_hardif_neigh_print - print a single hop neighbour node * @seq: neighbour table seq_file struct * @hardif_neigh: hardif neighbour information @@ -2030,6 +2262,134 @@ static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, }
/** + * batadv_iv_ogm_neigh_dump_neigh - Dump a neighbour into a netlink message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @hardif_neigh: Neighbour to be dumped + * + * Return: Error code, or 0 on success + */ +static int +batadv_iv_ogm_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hardif_neigh_node *hardif_neigh) +{ + void *hdr; + unsigned int last_seen_msecs; + + last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, BATADV_CMD_GET_NEIGHBORS); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, + hardif_neigh->addr) || + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, + hardif_neigh->if_incoming->net_dev->ifindex) || + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_iv_ogm_neigh_dump_hardif - Dump the neighbours of a hard interface + * into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @hard_iface: Hard interface to dump the neighbours for + * @idx_s: Number of entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_iv_ogm_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *hard_iface, + int *idx_s) +{ + struct batadv_hardif_neigh_node *hardif_neigh; + int idx = 0; + + hlist_for_each_entry_rcu(hardif_neigh, + &hard_iface->neigh_list, list) { + if (idx++ < *idx_s) + continue; + + if (batadv_iv_ogm_neigh_dump_neigh(msg, portid, seq, + hardif_neigh)) { + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + + *idx_s = 0; + return 0; +} + +/** + * batadv_iv_ogm_neigh_dump - Dump the neighbours into a message + * @msg: Netlink message to dump into + * @cb: Control block containing additional options + * @bat_priv: The bat priv with all the soft interface information + * @single_hardif: Limit dump to this hard interfaace + */ +static void +batadv_iv_ogm_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *single_hardif) +{ + struct batadv_hard_iface *hard_iface; + int i_hardif = 0; + int i_hardif_s = cb->args[0]; + int idx = cb->args[1]; + int portid = NETLINK_CB(cb->skb).portid; + + rcu_read_lock(); + if (single_hardif) { + if (i_hardif_s == 0) { + if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, + single_hardif, + &idx) == 0) + i_hardif++; + } + } else { + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, + list) { + if (hard_iface->soft_iface != bat_priv->soft_iface) + continue; + + if (i_hardif++ < i_hardif_s) + continue; + + if (batadv_iv_ogm_neigh_dump_hardif(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, + hard_iface, &idx)) { + i_hardif--; + break; + } + } + } + rcu_read_unlock(); + + cb->args[0] = i_hardif; + cb->args[1] = idx; +} + +/** * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors * @neigh1: the first neighbor object of the comparison * @if_outgoing1: outgoing interface for the first neighbor @@ -2128,7 +2488,9 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = { .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, .bat_neigh_is_similar_or_better = batadv_iv_ogm_neigh_is_sob, .bat_neigh_print = batadv_iv_neigh_print, + .bat_neigh_dump = batadv_iv_ogm_neigh_dump, .bat_orig_print = batadv_iv_ogm_orig_print, + .bat_orig_dump = batadv_iv_ogm_orig_dump, .bat_orig_free = batadv_iv_ogm_orig_free, .bat_orig_add_if = batadv_iv_ogm_orig_add_if, .bat_orig_del_if = batadv_iv_ogm_orig_del_if, diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index f4a720a..b98e6bd 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -84,6 +84,8 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 }, [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG }, [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 }, + [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN }, + [BATADV_ATTR_TQ] = { .type = NLA_U8 }, };
/**
From: Matthias Schiffer mschiffer@universe-factory.net
Dump the algo V originators and neighbours.
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Andrew Lunn andrew@lunn.ch [sven@narfation.org: Fix includes] Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 2 + net/batman-adv/bat_v.c | 337 ++++++++++++++++++++++++++++++++++++++++ net/batman-adv/netlink.c | 1 + 3 files changed, 340 insertions(+)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 14fb529..0cb6586 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -87,6 +87,7 @@ enum batadv_tt_client_flags { * @BATADV_ATTR_LAST_SEEN_MSECS: Time in milliseconds since last seen * @BATADV_ATTR_NEIGH_ADDRESS: Neighbour MAC address * @BATADV_ATTR_TQ: TQ to neighbour + * @BATADV_ATTR_THROUGHPUT: Estimated throughput to Neighbour * @__BATADV_ATTR_AFTER_LAST: internal use * @NUM_BATADV_ATTR: total number of batadv_nl_attrs available * @BATADV_ATTR_MAX: highest attribute number currently defined @@ -118,6 +119,7 @@ enum batadv_nl_attrs { BATADV_ATTR_LAST_SEEN_MSECS, BATADV_ATTR_NEIGH_ADDRESS, BATADV_ATTR_TQ, + BATADV_ATTR_THROUGHPUT, /* add attributes above here, update the policy in netlink.c */ __BATADV_ATTR_AFTER_LAST, NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST, diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c index e4a91cd..f648ebe 100644 --- a/net/batman-adv/bat_v.c +++ b/net/batman-adv/bat_v.c @@ -20,24 +20,33 @@
#include <linux/bug.h> #include <linux/cache.h> +#include <linux/errno.h> +#include <linux/if_ether.h> #include <linux/init.h> #include <linux/jiffies.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/rculist.h> #include <linux/rcupdate.h> #include <linux/seq_file.h> #include <linux/stddef.h> #include <linux/types.h> #include <linux/workqueue.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <uapi/linux/batman_adv.h>
#include "bat_algo.h" #include "bat_v_elp.h" #include "bat_v_ogm.h" #include "hard-interface.h" #include "hash.h" +#include "netlink.h" #include "originator.h" #include "packet.h"
+struct sk_buff; + static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface) { struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); @@ -199,6 +208,136 @@ static void batadv_v_neigh_print(struct batadv_priv *bat_priv, }
/** + * batadv_v_neigh_dump_neigh - Dump a neighbour into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @hardif_neigh: Neighbour to dump + * + * Return: Error code, or 0 on success + */ +static int +batadv_v_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hardif_neigh_node *hardif_neigh) +{ + void *hdr; + unsigned int last_seen_msecs; + u32 throughput; + + last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen); + throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput); + throughput = throughput * 100; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_NEIGHBORS); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, + hardif_neigh->addr) || + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, + hardif_neigh->if_incoming->net_dev->ifindex) || + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs) || + nla_put_u32(msg, BATADV_ATTR_THROUGHPUT, throughput)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_v_neigh_dump_hardif - Dump the neighbours of a hard interface into + * a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @hard_iface: The hard interface to be dumped + * @idx_s: Entries to be skipped + * + * Return: Error code, or 0 on success + */ +static int +batadv_v_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *hard_iface, + int *idx_s) +{ + struct batadv_hardif_neigh_node *hardif_neigh; + int idx = 0; + + hlist_for_each_entry_rcu(hardif_neigh, + &hard_iface->neigh_list, list) { + if (idx++ < *idx_s) + continue; + + if (batadv_v_neigh_dump_neigh(msg, portid, seq, hardif_neigh)) { + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + + *idx_s = 0; + return 0; +} + +/** + * batadv_v_neigh_dump - Dump the neighbours of a hard interface into a + * message + * @msg: Netlink message to dump into + * @cb: Control block containing additional options + * @bat_priv: The bat priv with all the soft interface information + * @single_hardif: Limit dumping to this hard interface + */ +static void +batadv_v_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *single_hardif) +{ + struct batadv_hard_iface *hard_iface; + int i_hardif = 0; + int i_hardif_s = cb->args[0]; + int idx = cb->args[1]; + int portid = NETLINK_CB(cb->skb).portid; + + rcu_read_lock(); + if (single_hardif) { + if (i_hardif_s == 0) { + if (batadv_v_neigh_dump_hardif(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, single_hardif, + &idx) == 0) + i_hardif++; + } + } else { + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->soft_iface != bat_priv->soft_iface) + continue; + + if (i_hardif++ < i_hardif_s) + continue; + + if (batadv_v_neigh_dump_hardif(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, hard_iface, + &idx)) { + i_hardif--; + break; + } + } + } + rcu_read_unlock(); + + cb->args[0] = i_hardif; + cb->args[1] = idx; +} + +/** * batadv_v_orig_print - print the originator table * @bat_priv: the bat priv with all the soft interface information * @seq: debugfs table seq_file struct @@ -265,6 +404,202 @@ next: seq_puts(seq, "No batman nodes in range ...\n"); }
+/** + * batadv_v_orig_dump_subentry - Dump an originator subentry into a + * message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + * @orig_node: Originator to dump + * @neigh_node: Single hops neighbour + * @best: Is the best originator + * + * Return: Error code, or 0 on success + */ +static int +batadv_v_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct batadv_orig_node *orig_node, + struct batadv_neigh_node *neigh_node, + bool best) +{ + struct batadv_neigh_ifinfo *n_ifinfo; + unsigned int last_seen_msecs; + u32 throughput; + void *hdr; + + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); + if (!n_ifinfo) + return 0; + + throughput = n_ifinfo->bat_v.throughput * 100; + + batadv_neigh_ifinfo_put(n_ifinfo); + + last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen); + + if (if_outgoing != BATADV_IF_DEFAULT && + if_outgoing != neigh_node->if_incoming) + return 0; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI, + BATADV_CMD_GET_ORIGINATORS); + if (!hdr) + return -ENOBUFS; + + if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, orig_node->orig) || + nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN, + neigh_node->addr) || + nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX, + neigh_node->if_incoming->net_dev->ifindex) || + nla_put_u32(msg, BATADV_ATTR_THROUGHPUT, throughput) || + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, + last_seen_msecs)) + goto nla_put_failure; + + if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/** + * batadv_v_orig_dump_entry - Dump an originator entry into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + * @orig_node: Originator to dump + * @sub_s: Number of sub entries to skip + * + * Return: Error code, or 0 on success + */ +static int +batadv_v_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct batadv_orig_node *orig_node, int *sub_s) +{ + struct batadv_neigh_node *neigh_node_best; + struct batadv_neigh_node *neigh_node; + int sub = 0; + bool best; + + neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing); + if (!neigh_node_best) + goto out; + + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + if (sub++ < *sub_s) + continue; + + best = (neigh_node == neigh_node_best); + + if (batadv_v_orig_dump_subentry(msg, portid, seq, bat_priv, + if_outgoing, orig_node, + neigh_node, best)) { + batadv_neigh_node_put(neigh_node_best); + + *sub_s = sub - 1; + return -EMSGSIZE; + } + } + + out: + if (neigh_node_best) + batadv_neigh_node_put(neigh_node_best); + + *sub_s = 0; + return 0; +} + +/** + * batadv_v_orig_dump_bucket - Dump an originator bucket into a + * message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + * @head: Bucket to be dumped + * @idx_s: Number of entries to be skipped + * @sub: Number of sub entries to be skipped + * + * Return: Error code, or 0 on success + */ +static int +batadv_v_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing, + struct hlist_head *head, int *idx_s, int *sub) +{ + struct batadv_orig_node *orig_node; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + if (idx++ < *idx_s) + continue; + + if (batadv_v_orig_dump_entry(msg, portid, seq, bat_priv, + if_outgoing, orig_node, sub)) { + rcu_read_unlock(); + *idx_s = idx - 1; + return -EMSGSIZE; + } + } + rcu_read_unlock(); + + *idx_s = 0; + *sub = 0; + return 0; +} + +/** + * batadv_v_orig_dump - Dump the originators into a message + * @msg: Netlink message to dump into + * @cb: Control block containing additional options + * @bat_priv: The bat priv with all the soft interface information + * @if_outgoing: Limit dump to entries with this outgoing interface + */ +static void +batadv_v_orig_dump(struct sk_buff *msg, struct netlink_callback *cb, + struct batadv_priv *bat_priv, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_hashtable *hash = bat_priv->orig_hash; + struct hlist_head *head; + int bucket = cb->args[0]; + int idx = cb->args[1]; + int sub = cb->args[2]; + int portid = NETLINK_CB(cb->skb).portid; + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_v_orig_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, + bat_priv, if_outgoing, head, &idx, + &sub)) + break; + + bucket++; + } + + cb->args[0] = bucket; + cb->args[1] = idx; + cb->args[2] = sub; +} + static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1, struct batadv_hard_iface *if_outgoing1, struct batadv_neigh_node *neigh2, @@ -328,9 +663,11 @@ static struct batadv_algo_ops batadv_batman_v __read_mostly = { .bat_primary_iface_set = batadv_v_primary_iface_set, .bat_hardif_neigh_init = batadv_v_hardif_neigh_init, .bat_orig_print = batadv_v_orig_print, + .bat_orig_dump = batadv_v_orig_dump, .bat_neigh_cmp = batadv_v_neigh_cmp, .bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob, .bat_neigh_print = batadv_v_neigh_print, + .bat_neigh_dump = batadv_v_neigh_dump, };
/** diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index b98e6bd..26ca596 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -86,6 +86,7 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 }, [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN }, [BATADV_ATTR_TQ] = { .type = NLA_U8 }, + [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 }, };
/**
From: Andrew Lunn andrew@lunn.ch
Dump the list of gateways via the netlink socket.
Signed-off-by: Andrew Lunn andrew@lunn.ch [sven.eckelmann@open-mesh.com: add policy for attributes] Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 8 +++ net/batman-adv/gateway_client.c | 148 ++++++++++++++++++++++++++++++++++++++++ net/batman-adv/gateway_client.h | 2 + net/batman-adv/netlink.c | 10 +++ 4 files changed, 168 insertions(+)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 0cb6586..20b4dc4 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -88,6 +88,9 @@ enum batadv_tt_client_flags { * @BATADV_ATTR_NEIGH_ADDRESS: Neighbour MAC address * @BATADV_ATTR_TQ: TQ to neighbour * @BATADV_ATTR_THROUGHPUT: Estimated throughput to Neighbour + * @BATADV_ATTR_BANDWIDTH_UP: Reported uplink bandwidth + * @BATADV_ATTR_BANDWIDTH_DOWN: Reported downlink bandwidth + * @BATADV_ATTR_ROUTER: Gateway router MAC address * @__BATADV_ATTR_AFTER_LAST: internal use * @NUM_BATADV_ATTR: total number of batadv_nl_attrs available * @BATADV_ATTR_MAX: highest attribute number currently defined @@ -120,6 +123,9 @@ enum batadv_nl_attrs { BATADV_ATTR_NEIGH_ADDRESS, BATADV_ATTR_TQ, BATADV_ATTR_THROUGHPUT, + BATADV_ATTR_BANDWIDTH_UP, + BATADV_ATTR_BANDWIDTH_DOWN, + BATADV_ATTR_ROUTER, /* add attributes above here, update the policy in netlink.c */ __BATADV_ATTR_AFTER_LAST, NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST, @@ -139,6 +145,7 @@ enum batadv_nl_attrs { * @BATADV_CMD_GET_TRANSTABLE_GLOBAL Query list of global translations * @BATADV_CMD_GET_ORIGINATORS: Query list of originators * @BATADV_CMD_GET_NEIGHBORS: Query list of neighbours + * @BATADV_CMD_GET_GATEWAYS: Query list of gateways * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -153,6 +160,7 @@ enum batadv_nl_commands { BATADV_CMD_GET_TRANSTABLE_GLOBAL, BATADV_CMD_GET_ORIGINATORS, BATADV_CMD_GET_NEIGHBORS, + BATADV_CMD_GET_GATEWAYS, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c index e108d45..85c67b5 100644 --- a/net/batman-adv/gateway_client.c +++ b/net/batman-adv/gateway_client.c @@ -20,6 +20,7 @@
#include <linux/atomic.h> #include <linux/byteorder/generic.h> +#include <linux/errno.h> #include <linux/etherdevice.h> #include <linux/fs.h> #include <linux/if_ether.h> @@ -31,6 +32,7 @@ #include <linux/kref.h> #include <linux/list.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/rculist.h> #include <linux/rcupdate.h> #include <linux/seq_file.h> @@ -39,13 +41,19 @@ #include <linux/spinlock.h> #include <linux/stddef.h> #include <linux/udp.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <net/sock.h> +#include <uapi/linux/batman_adv.h>
#include "gateway_common.h" #include "hard-interface.h" #include "log.h" +#include "netlink.h" #include "originator.h" #include "packet.h" #include "routing.h" +#include "soft-interface.h" #include "sysfs.h" #include "translation-table.h"
@@ -664,6 +672,146 @@ out: }
/** + * batadv_gw_dump_entry - Dump a gateway into a message + * @msg: Netlink message to dump into + * @portid: Port making netlink request + * @seq: Sequence number of netlink message + * @bat_priv: The bat priv with all the soft interface information + * @gw_node: Gateway to be dumped + * + * Return: Error code, or 0 on success + */ +static int +batadv_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_priv *bat_priv, + struct batadv_gw_node *gw_node) +{ + struct batadv_neigh_ifinfo *router_ifinfo = NULL; + struct batadv_neigh_node *router; + struct batadv_gw_node *curr_gw; + int ret = -EINVAL; + void *hdr; + + router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT); + if (!router) + goto out; + + router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); + if (!router_ifinfo) + goto out; + + curr_gw = batadv_gw_get_selected_gw_node(bat_priv); + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, BATADV_CMD_GET_GATEWAYS); + if (!hdr) { + ret = -ENOBUFS; + goto out; + } + + ret = -EMSGSIZE; + + if (curr_gw == gw_node) + if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, + gw_node->orig_node->orig) || + nla_put_u8(msg, BATADV_ATTR_TQ, router_ifinfo->bat_iv.tq_avg) || + nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN, + router->addr) || + nla_put_string(msg, BATADV_ATTR_HARD_IFNAME, + router->if_incoming->net_dev->name) || + nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN, + gw_node->bandwidth_down) || + nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP, + gw_node->bandwidth_up)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + genlmsg_end(msg, hdr); + ret = 0; + +out: + if (router_ifinfo) + batadv_neigh_ifinfo_put(router_ifinfo); + if (router) + batadv_neigh_node_put(router); + return ret; +} + +/** + * batadv_gw_dump - Dump gateways into a message + * @msg: Netlink message to dump into + * @cb: Control block containing additional options + * + * Return: Error code, or length of message + */ +int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct batadv_hard_iface *primary_if = NULL; + struct net *net = sock_net(cb->skb->sk); + int portid = NETLINK_CB(cb->skb).portid; + struct net_device *soft_iface = NULL; + struct batadv_gw_node *gw_node; + struct batadv_priv *bat_priv; + int idx_skip = cb->args[0]; + int ifindex; + int idx = 0; + int ret; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, + BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + rcu_read_lock(); + hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.list, list) { + if (idx++ < idx_skip) + continue; + + if (batadv_gw_dump_entry(msg, portid, cb->nlh->nlmsg_seq, + bat_priv, gw_node)) { + idx_skip = idx - 1; + ret = msg->len; + goto unlock; + } + } + + idx_skip = idx; + ret = msg->len; +unlock: + rcu_read_unlock(); + +out: + if (primary_if) + batadv_hardif_put(primary_if); + if (soft_iface) + dev_put(soft_iface); + + cb->args[0] = idx_skip; + + return ret; +} + +/** * batadv_gw_dhcp_recipient_get - check if a packet is a DHCP message * @skb: the packet to check * @header_len: a pointer to the batman-adv header size diff --git a/net/batman-adv/gateway_client.h b/net/batman-adv/gateway_client.h index 582dd8c..f1b2d39 100644 --- a/net/batman-adv/gateway_client.h +++ b/net/batman-adv/gateway_client.h @@ -23,6 +23,7 @@ #include <linux/types.h>
struct batadv_tvlv_gateway_data; +struct netlink_callback; struct seq_file; struct sk_buff;
@@ -40,6 +41,7 @@ void batadv_gw_node_delete(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node); void batadv_gw_node_free(struct batadv_priv *bat_priv); int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset); +int batadv_gw_dump(struct sk_buff *msg, struct netlink_callback *cb); bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct sk_buff *skb); enum batadv_dhcp_recipient batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len, diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 26ca596..7209fc1 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -38,6 +38,7 @@ #include <uapi/linux/batman_adv.h>
#include "bat_algo.h" +#include "gateway_client.h" #include "hard-interface.h" #include "originator.h" #include "soft-interface.h" @@ -87,6 +88,9 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN }, [BATADV_ATTR_TQ] = { .type = NLA_U8 }, [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 }, + [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 }, + [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 }, + [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN }, };
/** @@ -570,6 +574,12 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_hardif_neigh_dump, }, + { + .cmd = BATADV_CMD_GET_GATEWAYS, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_gw_dump, + }, };
/**
From: Andrew Lunn andrew@lunn.ch
Dump the list of bridge loop avoidance claims via the netlink socket.
Signed-off-by: Andrew Lunn andrew@lunn.ch [sven.eckelmann@open-mesh.com: add policy for attributes, fix includes, fix soft_iface reference leak] Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com [sw@simonwunderlich.de: fix kerneldoc, fix error reporting] Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 12 +++ net/batman-adv/bridge_loop_avoidance.c | 169 +++++++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.h | 10 +- net/batman-adv/netlink.c | 12 +++ 4 files changed, 202 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 20b4dc4..778e238 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -91,6 +91,11 @@ enum batadv_tt_client_flags { * @BATADV_ATTR_BANDWIDTH_UP: Reported uplink bandwidth * @BATADV_ATTR_BANDWIDTH_DOWN: Reported downlink bandwidth * @BATADV_ATTR_ROUTER: Gateway router MAC address + * @BATADV_ATTR_BLA_OWN: Flag indicating own originator + * @BATADV_ATTR_BLA_ADDRESS: Bridge loop avoidance claim MAC address + * @BATADV_ATTR_BLA_VID: BLA VLAN ID + * @BATADV_ATTR_BLA_BACKBONE: BLA gateway originator MAC address + * @BATADV_ATTR_BLA_CRC: BLA CRC * @__BATADV_ATTR_AFTER_LAST: internal use * @NUM_BATADV_ATTR: total number of batadv_nl_attrs available * @BATADV_ATTR_MAX: highest attribute number currently defined @@ -126,6 +131,11 @@ enum batadv_nl_attrs { BATADV_ATTR_BANDWIDTH_UP, BATADV_ATTR_BANDWIDTH_DOWN, BATADV_ATTR_ROUTER, + BATADV_ATTR_BLA_OWN, + BATADV_ATTR_BLA_ADDRESS, + BATADV_ATTR_BLA_VID, + BATADV_ATTR_BLA_BACKBONE, + BATADV_ATTR_BLA_CRC, /* add attributes above here, update the policy in netlink.c */ __BATADV_ATTR_AFTER_LAST, NUM_BATADV_ATTR = __BATADV_ATTR_AFTER_LAST, @@ -146,6 +156,7 @@ enum batadv_nl_attrs { * @BATADV_CMD_GET_ORIGINATORS: Query list of originators * @BATADV_CMD_GET_NEIGHBORS: Query list of neighbours * @BATADV_CMD_GET_GATEWAYS: Query list of gateways + * @BATADV_CMD_GET_BLA_CLAIM: Query list of bridge loop avoidance claims * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -161,6 +172,7 @@ enum batadv_nl_commands { BATADV_CMD_GET_ORIGINATORS, BATADV_CMD_GET_NEIGHBORS, BATADV_CMD_GET_GATEWAYS, + BATADV_CMD_GET_BLA_CLAIM, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index e4f7494..122025e 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -35,6 +35,7 @@ #include <linux/list.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/netlink.h> #include <linux/rculist.h> #include <linux/rcupdate.h> #include <linux/seq_file.h> @@ -45,12 +46,18 @@ #include <linux/string.h> #include <linux/workqueue.h> #include <net/arp.h> +#include <net/genetlink.h> +#include <net/netlink.h> +#include <net/sock.h> +#include <uapi/linux/batman_adv.h>
#include "hard-interface.h" #include "hash.h" #include "log.h" +#include "netlink.h" #include "originator.h" #include "packet.h" +#include "soft-interface.h" #include "sysfs.h" #include "translation-table.h"
@@ -1984,6 +1991,168 @@ out: }
/** + * batadv_bla_claim_dump_entry - dump one entry of the claim table + * to a netlink socket + * @msg: buffer for the message + * @portid: netlink port + * @seq: Sequence number of netlink message + * @primary_if: primary interface + * @claim: entry to dump + * + * Return: 0 or error code. + */ +static int +batadv_bla_claim_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *primary_if, + struct batadv_bla_claim *claim) +{ + u8 *primary_addr = primary_if->net_dev->dev_addr; + u16 backbone_crc; + bool is_own; + void *hdr; + int ret = -EINVAL; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, BATADV_CMD_GET_BLA_CLAIM); + if (!hdr) { + ret = -ENOBUFS; + goto out; + } + + is_own = batadv_compare_eth(claim->backbone_gw->orig, + primary_addr); + + spin_lock_bh(&claim->backbone_gw->crc_lock); + backbone_crc = claim->backbone_gw->crc; + spin_unlock_bh(&claim->backbone_gw->crc_lock); + + if (is_own) + if (nla_put_flag(msg, BATADV_ATTR_BLA_OWN)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + if (nla_put(msg, BATADV_ATTR_BLA_ADDRESS, ETH_ALEN, claim->addr) || + nla_put_u16(msg, BATADV_ATTR_BLA_VID, claim->vid) || + nla_put(msg, BATADV_ATTR_BLA_BACKBONE, ETH_ALEN, + claim->backbone_gw->orig) || + nla_put_u16(msg, BATADV_ATTR_BLA_CRC, + backbone_crc)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + genlmsg_end(msg, hdr); + ret = 0; + +out: + return ret; +} + +/** + * batadv_bla_claim_dump_bucket - dump one bucket of the claim table + * to a netlink socket + * @msg: buffer for the message + * @portid: netlink port + * @seq: Sequence number of netlink message + * @primary_if: primary interface + * @head: bucket to dump + * @idx_skip: How many entries to skip + * + * Return: always 0. + */ +static int +batadv_bla_claim_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *primary_if, + struct hlist_head *head, int *idx_skip) +{ + struct batadv_bla_claim *claim; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(claim, head, hash_entry) { + if (idx++ < *idx_skip) + continue; + if (batadv_bla_claim_dump_entry(msg, portid, seq, + primary_if, claim)) { + *idx_skip = idx - 1; + goto unlock; + } + } + + *idx_skip = idx; +unlock: + rcu_read_unlock(); + return 0; +} + +/** + * batadv_bla_claim_dump - dump claim table to a netlink socket + * @msg: buffer for the message + * @cb: callback structure containing arguments + * + * Return: message length. + */ +int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct batadv_hard_iface *primary_if = NULL; + int portid = NETLINK_CB(cb->skb).portid; + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct batadv_hashtable *hash; + struct batadv_priv *bat_priv; + int bucket = cb->args[0]; + struct hlist_head *head; + int idx = cb->args[1]; + int ifindex; + int ret = 0; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, + BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + hash = bat_priv->bla.claim_hash; + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_bla_claim_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, + primary_if, head, &idx)) + break; + bucket++; + } + + cb->args[0] = bucket; + cb->args[1] = idx; + + ret = msg->len; + +out: + if (primary_if) + batadv_hardif_put(primary_if); + + if (soft_iface) + dev_put(soft_iface); + + return ret; +} + +/** * batadv_bla_backbone_table_seq_print_text - print the backbone table in a seq * file * @seq: seq file to print on diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index 0f01dae..a80b9e9 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -23,6 +23,7 @@ #include <linux/types.h>
struct net_device; +struct netlink_callback; struct seq_file; struct sk_buff;
@@ -35,6 +36,7 @@ bool batadv_bla_is_backbone_gw(struct sk_buff *skb, struct batadv_orig_node *orig_node, int hdr_size); int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset); +int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset); bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig, @@ -47,7 +49,7 @@ void batadv_bla_update_orig_address(struct batadv_priv *bat_priv, void batadv_bla_status_update(struct net_device *net_dev); int batadv_bla_init(struct batadv_priv *bat_priv); void batadv_bla_free(struct batadv_priv *bat_priv); - +int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); #define BATADV_BLA_CRC_INIT 0 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
@@ -112,6 +114,12 @@ static inline void batadv_bla_free(struct batadv_priv *bat_priv) { }
+static inline int batadv_bla_claim_dump(struct sk_buff *msg, + struct netlink_callback *cb) +{ + return -EOPNOTSUPP; +} + #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */ diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 7209fc1..93a4c5d 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -38,6 +38,7 @@ #include <uapi/linux/batman_adv.h>
#include "bat_algo.h" +#include "bridge_loop_avoidance.h" #include "gateway_client.h" #include "hard-interface.h" #include "originator.h" @@ -91,6 +92,11 @@ static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = { [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 }, [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 }, [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN }, + [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG }, + [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN }, + [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 }, + [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN }, + [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 }, };
/** @@ -580,6 +586,12 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_gw_dump, }, + { + .cmd = BATADV_CMD_GET_BLA_CLAIM, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_bla_claim_dump, + }, };
/**
From: Sven Eckelmann sven@narfation.org
The bridge loop avoidange is the main information for the debugging of of bridge loop detection problems. It is therefore necessary when comparing the bla claim tables.
Signed-off-by: Sven Eckelmann sven@narfation.org Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- net/batman-adv/netlink.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index 93a4c5d..e079974 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -19,6 +19,7 @@ #include "main.h"
#include <linux/atomic.h> +#include <linux/byteorder/generic.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/genetlink.h> @@ -42,6 +43,7 @@ #include "gateway_client.h" #include "hard-interface.h" #include "originator.h" +#include "packet.h" #include "soft-interface.h" #include "tp_meter.h" #include "translation-table.h" @@ -141,6 +143,12 @@ batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface) (u8)atomic_read(&bat_priv->tt.vn))) goto out;
+#ifdef CONFIG_BATMAN_ADV_BLA + if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC, + ntohs(bat_priv->bla.claim_dest.group))) + goto out; +#endif + primary_if = batadv_primary_if_get_selected(bat_priv); if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) { hard_iface = primary_if->net_dev;
Dump the list of bridge loop avoidance backbones via the netlink socket.
Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- include/uapi/linux/batman_adv.h | 2 + net/batman-adv/bridge_loop_avoidance.c | 164 +++++++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.h | 7 ++ net/batman-adv/netlink.c | 7 ++ 4 files changed, 180 insertions(+)
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h index 778e238..37157d0 100644 --- a/include/uapi/linux/batman_adv.h +++ b/include/uapi/linux/batman_adv.h @@ -157,6 +157,7 @@ enum batadv_nl_attrs { * @BATADV_CMD_GET_NEIGHBORS: Query list of neighbours * @BATADV_CMD_GET_GATEWAYS: Query list of gateways * @BATADV_CMD_GET_BLA_CLAIM: Query list of bridge loop avoidance claims + * @BATADV_CMD_GET_BLA_BACKBONE: Query list of bridge loop avoidance backbones * @__BATADV_CMD_AFTER_LAST: internal use * @BATADV_CMD_MAX: highest used command number */ @@ -173,6 +174,7 @@ enum batadv_nl_commands { BATADV_CMD_GET_NEIGHBORS, BATADV_CMD_GET_GATEWAYS, BATADV_CMD_GET_BLA_CLAIM, + BATADV_CMD_GET_BLA_BACKBONE, /* add new commands above here */ __BATADV_CMD_AFTER_LAST, BATADV_CMD_MAX = __BATADV_CMD_AFTER_LAST - 1 diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index 122025e..a7f012c 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -2215,3 +2215,167 @@ out: batadv_hardif_put(primary_if); return 0; } + +/** + * batadv_bla_backbone_dump_entry - dump one entry of the backbone table + * to a netlink socket + * @msg: buffer for the message + * @portid: netlink port + * @seq: Sequence number of netlink message + * @primary_if: primary interface + * @backbone_gw: entry to dump + * + * Return: 0 or error code. + */ +static int +batadv_bla_backbone_dump_entry(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *primary_if, + struct batadv_bla_backbone_gw *backbone_gw) +{ + u8 *primary_addr = primary_if->net_dev->dev_addr; + u16 backbone_crc; + bool is_own; + int msecs; + void *hdr; + int ret = -EINVAL; + + hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, + NLM_F_MULTI, BATADV_CMD_GET_BLA_BACKBONE); + if (!hdr) { + ret = -ENOBUFS; + goto out; + } + + is_own = batadv_compare_eth(backbone_gw->orig, primary_addr); + + spin_lock_bh(&backbone_gw->crc_lock); + backbone_crc = backbone_gw->crc; + spin_unlock_bh(&backbone_gw->crc_lock); + + msecs = jiffies_to_msecs(jiffies - backbone_gw->lasttime); + + if (is_own) + if (nla_put_flag(msg, BATADV_ATTR_BLA_OWN)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + if (nla_put(msg, BATADV_ATTR_BLA_BACKBONE, ETH_ALEN, + backbone_gw->orig) || + nla_put_u16(msg, BATADV_ATTR_BLA_VID, backbone_gw->vid) || + nla_put_u16(msg, BATADV_ATTR_BLA_CRC, + backbone_crc) || + nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS, msecs)) { + genlmsg_cancel(msg, hdr); + goto out; + } + + genlmsg_end(msg, hdr); + ret = 0; + +out: + return ret; +} + +/** + * batadv_bla_backbone_dump_bucket - dump one bucket of the backbone table + * to a netlink socket + * @msg: buffer for the message + * @portid: netlink port + * @seq: Sequence number of netlink message + * @primary_if: primary interface + * @head: bucket to dump + * @idx_skip: How many entries to skip + * + * Return: always 0. + */ +static int +batadv_bla_backbone_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq, + struct batadv_hard_iface *primary_if, + struct hlist_head *head, int *idx_skip) +{ + struct batadv_bla_backbone_gw *backbone_gw; + int idx = 0; + + rcu_read_lock(); + hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) { + if (idx++ < *idx_skip) + continue; + if (batadv_bla_backbone_dump_entry(msg, portid, seq, + primary_if, backbone_gw)) { + *idx_skip = idx - 1; + goto unlock; + } + } + + *idx_skip = idx; +unlock: + rcu_read_unlock(); + return 0; +} + +/** + * batadv_bla_backbone_dump - dump backbone table to a netlink socket + * @msg: buffer for the message + * @cb: callback structure containing arguments + * + * Return: message length. + */ +int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb) +{ + struct batadv_hard_iface *primary_if = NULL; + int portid = NETLINK_CB(cb->skb).portid; + struct net *net = sock_net(cb->skb->sk); + struct net_device *soft_iface = NULL; + struct batadv_hashtable *hash; + struct batadv_priv *bat_priv; + int bucket = cb->args[0]; + struct hlist_head *head; + int idx = cb->args[1]; + int ifindex; + int ret = 0; + + ifindex = batadv_netlink_get_ifindex(cb->nlh, + BATADV_ATTR_MESH_IFINDEX); + if (!ifindex) + return -EINVAL; + + soft_iface = dev_get_by_index(net, ifindex); + if (!soft_iface || !batadv_softif_is_valid(soft_iface)) { + ret = -ENODEV; + goto out; + } + + bat_priv = netdev_priv(soft_iface); + hash = bat_priv->bla.backbone_hash; + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) { + ret = -ENOENT; + goto out; + } + + while (bucket < hash->size) { + head = &hash->table[bucket]; + + if (batadv_bla_backbone_dump_bucket(msg, portid, + cb->nlh->nlmsg_seq, + primary_if, head, &idx)) + break; + bucket++; + } + + cb->args[0] = bucket; + cb->args[1] = idx; + + ret = msg->len; + +out: + if (primary_if) + batadv_hardif_put(primary_if); + + if (soft_iface) + dev_put(soft_iface); + + return ret; +} diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index a80b9e9..1ae93e4 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -39,6 +39,7 @@ int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset); int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset); +int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb); bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig, unsigned short vid); bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv, @@ -120,6 +121,12 @@ static inline int batadv_bla_claim_dump(struct sk_buff *msg, return -EOPNOTSUPP; }
+static inline int batadv_bla_backbone_dump(struct sk_buff *msg, + struct netlink_callback *cb) +{ + return -EOPNOTSUPP; +} + #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */ diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index e079974..e7785d9 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -600,6 +600,13 @@ static struct genl_ops batadv_netlink_ops[] = { .policy = batadv_netlink_policy, .dumpit = batadv_bla_claim_dump, }, + { + .cmd = BATADV_CMD_GET_BLA_BACKBONE, + .flags = GENL_ADMIN_PERM, + .policy = batadv_netlink_policy, + .dumpit = batadv_bla_backbone_dump, + }, + };
/**
From: Andrew Lunn andrew@lunn.ch
Set the netnsof flag on the family structure, indicating it can be used with different network name spaces.
Signed-off-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Simon Wunderlich sw@simonwunderlich.de --- net/batman-adv/netlink.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index e7785d9..3f5ba3c 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -54,6 +54,7 @@ struct genl_family batadv_netlink_family = { .name = BATADV_NL_NAME, .version = 1, .maxattr = BATADV_ATTR_MAX, + .netnsok = true, };
/* multicast groups */
b.a.t.m.a.n@lists.open-mesh.org
-
Antonio Quartulli -
Linus Lüssing -
Simon Wunderlich -
Sven Eckelmann