B.A.T.M.A.N December 2017

b.a.t.m.a.n@lists.open-mesh.org

18 participants
35 discussions

[B.A.T.M.A.N.] [PATCH] batman-adv: handle race condition for claims also in batadv_bla_rx
by Simon Wunderlich 02 Jul '19

02 Jul '19

From: Andreas Pape <apape(a)phoenixcontact.com> Like in the case of the patch for batadv_bla_tx to handle a race condition when claiming a mac address for bla, a similar situation can occur when claiming is triggered via batadv_bla_rx. This patch solves this with a similar approach as for batadv_bla_tx. Signed-off-by: Andreas Pape <apape(a)phoenixcontact.com> --- net/batman-adv/bridge_loop_avoidance.c | 31 ++++++++++++++++++++----------- net/batman-adv/translation-table.c | 26 ++++++++++++++++++++++++++ net/batman-adv/translation-table.h | 3 +++ 3 files changed, 49 insertions(+), 11 deletions(-) diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index d07e89e..cab8980 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -1847,19 +1847,28 @@ bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, if (!claim) { /* possible optimization: race for a claim */ - /* No claim exists yet, claim it for us! + /* Make sure this packet is not looping back + * from our own backbone. */ - batadv_dbg(BATADV_DBG_BLA, bat_priv, - "bla_rx(): Unclaimed MAC %pM found. Claim it. Local: %s\n", - ethhdr->h_source, - batadv_is_my_client(bat_priv, - ethhdr->h_source, vid) ? - "yes" : "no"); - batadv_handle_claim(bat_priv, primary_if, - primary_if->net_dev->dev_addr, - ethhdr->h_source, vid); - goto allow; + if (batadv_tt_local_has_timed_out(bat_priv, ethhdr->h_source, + vid, 100)) { + /* No claim exists yet, claim it for us! + */ + batadv_dbg(BATADV_DBG_BLA, bat_priv, + "bla_rx(): Unclaimed MAC %pM found. Claim it. Local: %s\n", + ethhdr->h_source, + batadv_is_my_client(bat_priv, + ethhdr->h_source, vid) ? + "yes" : "no"); + + batadv_handle_claim(bat_priv, primary_if, + primary_if->net_dev->dev_addr, + ethhdr->h_source, vid); + goto allow; + } else { + goto handled; + } } /* if it is our own claim ... */ diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index e75b493..b908195 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -4380,3 +4380,29 @@ void batadv_tt_cache_destroy(void) kmem_cache_destroy(batadv_tt_req_cache); kmem_cache_destroy(batadv_tt_roam_cache); } + +bool batadv_tt_local_has_timed_out(struct batadv_priv *bat_priv, + const u8 *addr, unsigned short vid, + unsigned int timeout) +{ + struct batadv_tt_local_entry *tt_local_entry; + bool ret = true; + + tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); + if (!tt_local_entry) + goto out; + /* Check if the client has been logically deleted (but is kept for + * consistency purpose) + */ + if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || + (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) + goto out; + /* Check that the tt_local_entry has a certain age */ + if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) + ret = false; + +out: + if (tt_local_entry) + batadv_tt_local_entry_put(tt_local_entry); + return ret; +} diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h index 411d586..b05d0d8 100644 --- a/net/batman-adv/translation-table.h +++ b/net/batman-adv/translation-table.h @@ -65,5 +65,8 @@ bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, int batadv_tt_cache_init(void); void batadv_tt_cache_destroy(void); +bool batadv_tt_local_has_timed_out(struct batadv_priv *bat_priv, + const u8 *addr, unsigned short vid, + unsigned int timeout); #endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */ -- 1.7.0.4

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[B.A.T.M.A.N.] [PATCH 00/17] pull request for net-next: batman-adv 2016-10-27
by Simon Wunderlich 04 Aug '18

04 Aug '18

Hi David, this is our first feature pull request for batman-adv (mostly containing code cleanup stuff), there are at least two more to come. Please pull or let me know of any problem! Thank you, Simon The following changes since commit 29fbff8698fc0ac1a1d74584b258e0bf18b469f9: Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (2016-10-13 21:40:23 -0700) are available in the git repository at: git://git.open-mesh.org/linux-merge.git tags/batadv-next-for-davem-20161027 for you to fetch changes up to 4c7da0f6dbcde2431d773ce03cde5e7abede54e0: batman-adv: Avoid precedence issues in macros (2016-10-19 08:37:54 +0200) ---------------------------------------------------------------- This code cleanup patchset includes the following changes (chronological order): - bump version strings, by Simon Wunderlich - README updates/clean up, by Sven Eckelmann (4 patches) - Code clean up and restructuring by Sven Eckelmann (2 patches) - Kerneldoc fix in forw_packet structure, by Linus Luessing - Remove unused argument in dbg_arp, by Antonio Quartulli - Add support to build batman-adv without wireless, by Linus Luessing - Restructure error handling for is_ap_isolated, by Markus Elfring - Remove unused initialization in various functions, by Sven Eckelmann - Use better names for fragment and gateway list heads, by Sven Eckelmann (2 patches) - Convert to octal permissions for files, by Sven Eckelmann - Avoid precedence issues for some macros, by Sven Eckelmann ---------------------------------------------------------------- Antonio Quartulli (1): batman-adv: remove unsed argument from batadv_dbg_arp() function Linus Lüssing (2): batman-adv: fix batadv_forw_packet kerneldoc for list attribute batman-adv: Allow selecting BATMAN V if CFG80211 is not built Markus Elfring (1): batman-adv: Less function calls in batadv_is_ap_isolated() after error detection Simon Wunderlich (1): batman-adv: Start new development cycle Sven Eckelmann (12): batman-adv: Add B.A.T.M.A.N. V sysfs files to README batman-adv: Add network_coding and mcast sysfs files to README batman-adv: Add dat, mcast, nc and neighbor debugfs files to README batman-adv: Document new nc, mcast and tpmeter log levels batman-adv: Remove unused function batadv_hash_delete batman-adv: Move batadv_sum_counter to soft-interface.c batman-adv: Remove unused batadv_icmp_user_cmd_type batman-adv: Remove needless init of variables on stack batman-adv: Use proper name for fragments list head batman-adv: Use proper name for gateway list head batman-adv: Use octal permissions instead of macros batman-adv: Avoid precedence issues in macros Documentation/networking/batman-adv.txt | 35 ++++++++++++---------- net/batman-adv/Kconfig | 2 +- net/batman-adv/bat_iv_ogm.c | 6 ++-- net/batman-adv/bat_v.c | 8 ++--- net/batman-adv/bat_v_ogm.c | 4 +-- net/batman-adv/debugfs.c | 26 ++++++++-------- net/batman-adv/distributed-arp-table.c | 17 ++++------- net/batman-adv/fragmentation.c | 18 +++++------ net/batman-adv/fragmentation.h | 2 +- net/batman-adv/gateway_client.c | 9 +++--- net/batman-adv/hash.h | 30 ------------------- net/batman-adv/icmp_socket.c | 5 ++-- net/batman-adv/log.c | 4 +-- net/batman-adv/log.h | 12 ++++---- net/batman-adv/main.c | 2 +- net/batman-adv/main.h | 27 ++--------------- net/batman-adv/network-coding.c | 8 ++--- net/batman-adv/originator.c | 10 +++---- net/batman-adv/packet.h | 12 +------- net/batman-adv/send.c | 2 +- net/batman-adv/soft-interface.c | 21 +++++++++++++ net/batman-adv/sysfs.c | 53 ++++++++++++++------------------- net/batman-adv/translation-table.c | 25 +++++++--------- net/batman-adv/types.h | 16 +++++----- 24 files changed, 149 insertions(+), 205 deletions(-)

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[B.A.T.M.A.N.] [PATCH maint] batman-adv: Fix internal interface indices types
by Sven Eckelmann 26 Feb '18

26 Feb '18

batman-adv uses internal indices for each enabled and active interface. It is currently used by the B.A.T.M.A.N. IV algorithm to identifify the correct position in the ogm_cnt bitmaps. The type for the number of enabled interfaces (which defines the next interface index) was set to char. This type can be (depending on the architecture) either signed (limiting batman-adv to 127 active slave interfaces) or unsigned (limiting batman-adv to 255 active slave interfaces). This limit was not correctly checked when an interface was enabled and thus an overflow happened. This was only catched on systems with the signed char type when the B.A.T.M.A.N. IV code tried to resize its counter arrays with a negative size. The if_num interface index was only a s16 and therefore significantly smaller than the ifindex (int) used by the code net code. Both &batadv_hard_iface->if_num and &batadv_priv->num_ifaces must be (unsigned) int to support the same number of slave interfaces as the net core code. And the interface activation code must check the number of active slave interfaces to avoid integer overflows. Fixes: d1fbb61d0534 ("raw socket operations added: create / destroy / bind / send broadcast of own OGMs implemented orig interval configurable via /proc/net/batman-adv/orig_interval") Fixes: ea6f8d42a595 ("batman-adv: move /proc interface handling to /sys") Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/bat_iv_ogm.c | 24 ++++++++++++++---------- net/batman-adv/hard-interface.c | 9 +++++++-- net/batman-adv/originator.c | 4 ++-- net/batman-adv/originator.h | 4 ++-- net/batman-adv/types.h | 11 ++++++----- 5 files changed, 31 insertions(+), 21 deletions(-) diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 79e32638..ed4be9d3 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -157,7 +157,7 @@ static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) * Return: 0 on success, a negative error code otherwise. */ static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, - int max_if_num) + unsigned int max_if_num) { void *data_ptr; size_t old_size; @@ -201,7 +201,8 @@ static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, */ static void batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node *orig_node, - int max_if_num, int del_if_num) + unsigned int max_if_num, + unsigned int del_if_num) { size_t chunk_size; size_t if_offset; @@ -239,7 +240,8 @@ batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node *orig_node, */ static void batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node *orig_node, - int max_if_num, int del_if_num) + unsigned int max_if_num, + unsigned int del_if_num) { size_t if_offset; void *data_ptr; @@ -276,7 +278,8 @@ batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node *orig_node, * Return: 0 on success, a negative error code otherwise. */ static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, - int max_if_num, int del_if_num) + unsigned int max_if_num, + unsigned int del_if_num) { spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); @@ -311,7 +314,8 @@ static struct batadv_orig_node * batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) { struct batadv_orig_node *orig_node; - int size, hash_added; + int hash_added; + size_t size; orig_node = batadv_orig_hash_find(bat_priv, addr); if (orig_node) @@ -893,7 +897,7 @@ batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) u32 i; size_t word_index; u8 *w; - int if_num; + unsigned int if_num; for (i = 0; i < hash->size; i++) { head = &hash->table[i]; @@ -1023,7 +1027,7 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, struct batadv_neigh_node *tmp_neigh_node = NULL; struct batadv_neigh_node *router = NULL; struct batadv_orig_node *orig_node_tmp; - int if_num; + unsigned int if_num; u8 sum_orig, sum_neigh; u8 *neigh_addr; u8 tq_avg; @@ -1182,7 +1186,7 @@ static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, u8 total_count; u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; - int if_num; + unsigned int if_num; unsigned int tq_asym_penalty, inv_asym_penalty; unsigned int combined_tq; unsigned int tq_iface_penalty; @@ -1702,9 +1706,9 @@ static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, if (is_my_orig) { unsigned long *word; - int offset; + size_t offset; s32 bit_pos; - s16 if_num; + unsigned int if_num; u8 *weight; orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index 5f186bff..68b54a39 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -763,6 +763,11 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, hard_iface->soft_iface = soft_iface; bat_priv = netdev_priv(hard_iface->soft_iface); + if (bat_priv->num_ifaces >= UINT_MAX) { + ret = -ENOSPC; + goto err_dev; + } + ret = netdev_master_upper_dev_link(hard_iface->net_dev, soft_iface, NULL, NULL, NULL); if (ret) @@ -876,7 +881,7 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface); /* nobody uses this interface anymore */ - if (!bat_priv->num_ifaces) { + if (bat_priv->num_ifaces == 0) { batadv_gw_check_client_stop(bat_priv); if (autodel == BATADV_IF_CLEANUP_AUTO) @@ -912,7 +917,7 @@ batadv_hardif_add_interface(struct net_device *net_dev) if (ret) goto free_if; - hard_iface->if_num = -1; + hard_iface->if_num = 0; hard_iface->net_dev = net_dev; hard_iface->soft_iface = NULL; hard_iface->if_status = BATADV_IF_NOT_IN_USE; diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 58a7d927..74782426 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -1569,7 +1569,7 @@ int batadv_orig_dump(struct sk_buff *msg, struct netlink_callback *cb) * Return: 0 on success or negative error number in case of failure */ int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, - int max_if_num) + unsigned int max_if_num) { struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct batadv_algo_ops *bao = bat_priv->algo_ops; @@ -1611,7 +1611,7 @@ int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, * Return: 0 on success or negative error number in case of failure */ int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, - int max_if_num) + unsigned int max_if_num) { struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct batadv_hashtable *hash = bat_priv->orig_hash; diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h index 8e543a3c..15d896b2 100644 --- a/net/batman-adv/originator.h +++ b/net/batman-adv/originator.h @@ -73,9 +73,9 @@ 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); + unsigned int max_if_num); int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, - int max_if_num); + unsigned int max_if_num); struct batadv_orig_node_vlan * batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, unsigned short vid); diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index bb157841..a5aa6d61 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -167,7 +167,7 @@ struct batadv_hard_iface { struct list_head list; /** @if_num: identificator of the interface */ - s16 if_num; + unsigned int if_num; /** @if_status: status of the interface for batman-adv */ char if_status; @@ -1596,7 +1596,7 @@ struct batadv_priv { atomic_t batman_queue_left; /** @num_ifaces: number of interfaces assigned to this mesh interface */ - char num_ifaces; + unsigned int num_ifaces; /** @mesh_obj: kobject for sysfs mesh subdirectory */ struct kobject *mesh_obj; @@ -2186,15 +2186,16 @@ struct batadv_algo_orig_ops { * orig_node due to a new hard-interface being added into the mesh * (optional) */ - int (*add_if)(struct batadv_orig_node *orig_node, int max_if_num); + int (*add_if)(struct batadv_orig_node *orig_node, + unsigned int max_if_num); /** * @del_if: ask the routing algorithm to apply the needed changes to the * orig_node due to an hard-interface being removed from the mesh * (optional) */ - int (*del_if)(struct batadv_orig_node *orig_node, int max_if_num, - int del_if_num); + int (*del_if)(struct batadv_orig_node *orig_node, + unsigned int max_if_num, unsigned int del_if_num); #ifdef CONFIG_BATMAN_ADV_DEBUGFS /** @print: print the originator table (optional) */ -- 2.11.0

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Re: [B.A.T.M.A.N.] limit of if per batman
by Sven Eckelmann 03 Feb '18

03 Feb '18

On Mittwoch, 25. Januar 2017 03:18:10 CET jens wrote: > On 24.01.2017 14:39, Sven Eckelmann wrote: > > There is no artificial limit added by batman-adv. But transmitting a lot of > > broadcasts over 255 virtual links sharing the same physical link > > might get interesting (independent of batman-adv). > > this made me curious , and i modified your script a bit - turns out > after the 127. IF you add to batman-adv you get an Error - > all 510 gretap links was succesfully build ... > # ifconfig |grep gre| wc -l > 515 > # batctl if|sort|wc -l > 127 > the error is mainly > *Error - can't write to file > '/sys/class/net/gre128/batman_adv/mesh_iface': Cannot allocate memory [...] > [113990.684947] [<ffffffff8107c16e>] ? __warn+0xbe/0xe0 [113990.684955] > [<ffffffffc017a804>] ? batadv_orig_hash_add_if+0x94/0x140 [batman_adv] > [113990.684961] [<ffffffff811a7b10>] ? kmalloc_slab+0x90/0xa0 > [113990.684966] [<ffffffff811e08c5>] ? __kmalloc+0x25/0x580 > [113990.684971] [<ffffffff815ef9d7>] ? _raw_spin_lock_irqsave+0x17/0x39 > [113990.684977] [<ffffffff81432c11>] ? _crng_backtrack_protect+0x31/0x70 > [113990.684981] [<ffffffff811e0ebc>] ? kmem_cache_alloc_trace+0x9c/0x540 > [113990.684986] [<ffffffff814340b7>] ? get_random_bytes+0xe7/0x1c0 > [113990.684991] [<ffffffffc017a804>] ? [...] I would guess that your system mostly fails becauseit cannot handle the allocation of the "large" arrays which store: * @bcast_own: set of bitfields (one per hard-interface) where each one counts * the number of our OGMs this orig_node rebroadcasted "back" to us (relative * to last_real_seqno). Every bitfield is BATADV_TQ_LOCAL_WINDOW_SIZE bits long. * @bcast_own_sum: sum of bcast_own Kind regards, Sven

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[B.A.T.M.A.N.] Can b.a.t.m.a.n. be configured to ARP for unknown clients?
by Robert Bates 05 Jan '18

05 Jan '18

Hello, Is it possible to have b.a.t.m.a.n. ARP if packets are received at bat0 for a client which has been removed/deleted due to timeout, and is therefore no longer in the translation tables? In one customer application of a product of ours (a mesh AP we've licensed from another vendor/developer, which is based on openWRT/b.a.t.m.a.n.), we are being adversely affected by the 10 minute inactivity timer on transtable_local. The clients in this customer's network/application are stationary devices which basically do not speak unless spoken to (e.g. when they are polled for data). They are periodically polled by a management platform, using an upper layer protocol running over TCP. The problem is that this customer's polling cycle time is variable, and occasionally it is taking longer than 10 minutes between successive polls of a given client/device. When this happens, that client is of course removed from transtable_local, and transtable_global on the other nodes in the mesh. Meanwhile, the polling/management platform has a very long ARP cache life, so it never ARPs (and apparently it is not possible on this platform to have the customer implement dynamic, rather than static ARP table entries, in which it would ARP upon polling failure). So once we get into this state, polls to this client device which has dropped out of the mesh are not possible, and their management platform throws alarms, etc. To bring it back in service at that point requires an ARP, which the customer is manually triggering with a ping, whenever one of these "outages" occurs. We know that the transtable_local inactivity/removal timer value can be extended, and we will probably do that, but we would also like to know if it is possible to have b.a.t.m.a.n. ARP for the removed client in this case. We prefer this approach, rather than arbitrarily changing the tt_local timer to some value which may not work well in some other customer's network/application. I know that there is a statistically valid underlying assumption with this 10 minute inactivity timer on transtable_local, that clients will typically be "chatty". But again, that is not the case in this application, which is a very common one in the industry in which we operate, where clients are very often fixed devices which only respond to explicit queries or commands. This is a new product and protocol for us, and this could beg the question of whether or not b.a.t.man.-based meshing is the right solution in this type of application. We believe it can be; it would just be helpful if we can configure it to ARP in this type of scenario. Can you please comment on how this might be possible (config or otherwise)? Thanks very much, Robert Bates IMPORTANT NOTICE: This communication, including any attachments, is the property of FreeWave Technologies, Inc. and may contain proprietary, confidential, or privileged information. Unauthorized use or disclosure of this communication is strictly prohibited and may be unlawful. Information contained herein may be subject to a Proprietary Information / Non-Disclosure Agreement and shall be maintained in confidence and not disclosed to third parties without the written consent of FreeWave Technologies, Inc. If you have received this communication in error, please immediately notify the sender and destroy all copies of the communication and any attachments.

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[B.A.T.M.A.N.] 11ac throughput on mesh links
by Daniel Ghansah 01 Jan '18

01 Jan '18

I am testing an implementation of batman-adv, alfred, 802.11s, 11ac. In this implementation I have my mesh interface on the 5GHz radio (qca9882), Using LEDE/Openwrt 17.01.04 I am getting root@Daniel Node:~# batctl tp 9c:b7:93:e3:56:e4 Test duration 10020ms. Sent 142966836 Bytes. Throughput: 13.61 MB/s (114.15 Mbps) is this inline with what everyone has seen. That data rate established is high however the throughput is very low root@Daniel Node:~# iw mesh0 station dump Station 9c:b7:93:e3:56:e4 (on mesh0) inactive time: 100 ms rx bytes: 75007154 rx packets: 910406 tx bytes: 968480244 tx packets: 635811 tx retries: 0 tx failed: 7 rx drop misc: 15 signal: -45 dBm signal avg: -44 dBm Toffset: 18446744061225933893 us tx bitrate: 6.0 MBit/s rx bitrate: 650.0 MBit/s VHT-MCS 7 80MHz short GI VHT-NSS 2 rx duration: 10763380 us mesh llid: 44135 mesh plid: 29835 mesh plink: ESTAB mesh local PS mode: ACTIVE mesh peer PS mode: ACTIVE mesh non-peer PS mode: ACTIVE authorized: yes authenticated: yes associated: yes preamble: long WMM/WME: yes MFP: no TDLS peer: no DTIM period: 2 beacon interval:100 short slot time:yes connected time: 12825 seconds What may I be doing wrong?

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Re: [B.A.T.M.A.N.] 11ac throughput on mesh links
by Daniel Ghansah 31 Dec '17

31 Dec '17

@klukonin Do you know if there is anyone working on a fix for this? On Sun, Dec 31, 2017 at 1:06 PM, klukonin <klukonin(a)gmail.com> wrote: > hello, Daniel. > > > I have the same results with 9880. > It is not a batman issue, but firmware + ath10k. > > Отправлено с Mi устройства > Daniel Ghansah <smartwires(a)gmail.com> | От: 31 дек. 2017 г. 22:59 | > Сообщение: > > I am testing an implementation of > batman-adv, alfred, 802.11s, 11ac. > In this implementation I have my mesh interface on the 5GHz radio > (qca9882), Using LEDE/Openwrt 17.01.04 > > I am getting > > root@Daniel Node:~# batctl tp 9c:b7:93:e3:56:e4 > Test duration 10020ms. > Sent 142966836 Bytes. > Throughput: 13.61 MB/s (114.15 Mbps) > is this inline with what everyone has seen. That data rate established is > high however the throughput is very low > > root@Daniel Node:~# iw mesh0 station dump > Station 9c:b7:93:e3:56:e4 (on mesh0) > inactive time: 100 ms > rx bytes: 75007154 > rx packets: 910406 > tx bytes: 968480244 > tx packets: 635811 > tx retries: 0 > tx failed: 7 > rx drop misc: 15 > signal: -45 dBm > signal avg: -44 dBm > Toffset: 18446744061225933893 us > tx bitrate: 6.0 MBit/s > rx bitrate: 650.0 MBit/s VHT-MCS 7 80MHz short GI VHT-NSS 2 > rx duration: 10763380 us > mesh llid: 44135 > mesh plid: 29835 > mesh plink: ESTAB > mesh local PS mode: ACTIVE > mesh peer PS mode: ACTIVE > mesh non-peer PS mode: ACTIVE > authorized: yes > authenticated: yes > associated: yes > preamble: long > WMM/WME: yes > MFP: no > TDLS peer: no > DTIM period: 2 > beacon interval:100 > short slot time:yes > connected time: 12825 seconds > > What may I be doing wrong? -- Regards, Daniel Ghansah 305-801-4895

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[B.A.T.M.A.N.] cannot recompile my openwrt image with last version of batman-adv 2017-4
by laurent 26 Dec '17

26 Dec '17

Hello, I had an openwrt image with batman-adv 2017-0 that compile fine but when I have updated to 2017-4 I got this error (it is a warning but treated as an error): I am able to compile alone the module in the build forlder: /home/user/gateworks-openwrt/build_dir/target-arm_mpcore+vfp_musl-1.1.12_eabi/linux-cns3xxx/batman-adv-2017.4/net/batman-adv/bat_iv_ogm.c:734:2: error: implicit declaration of function 'skb_put_data' [-Werror=implicit-function-declaration] skb_put_data(forw_packet_aggr->skb, packet_buff, packet_len); ^ cc1: some warnings being treated as errors make[5]: *** [/home/user/gateworks-openwrt/build_dir/target-arm_mpcore+vfp_musl-1.1.12_eabi/linux-cns3xxx/batman-adv-2017.4/net/batman-adv/bat_iv_ogm.o] Error 1 make[4]: *** [_module_/home/user/gateworks-openwrt/build_dir/target-arm_mpcore+vfp_musl-1.1.12_eabi/linux-cns3xxx/batman-adv-2017.4/net/batman-adv] Error 2 make[4]: Leaving directory `/home/user/gateworks-openwrt/build_dir/target-arm_mpcore+vfp_musl-1.1.12_eabi/linux-cns3xxx/linux-4.4' make[3]: *** [/home/user/gateworks-openwrt/build_dir/target-arm_mpcore+vfp_musl-1.1.12_eabi/linux-cns3xxx/batman-adv-2017.4/.built] Error 2 make[3]: Leaving directory `/home/user/gateworks-openwrt/feeds/routing/batman-adv' make[2]: *** [package/feeds/routing/batman-adv/compile] Error 2 make[2]: Leaving directory `/home/user/gateworks-openwrt' make[1]: *** [/home/user/gateworks-openwrt/staging_dir/target-arm_mpcore+vfp_musl-1.1.12_eabi/stamp/.package_compile] Error 2 make[1]: Leaving directory `/home/user/gateworks-openwrt' make: *** [world] Error 2 Thank you Laurent

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[B.A.T.M.A.N.] [PATCH] batman-adv: annotate ->poll() instances
by Sven Eckelmann 24 Dec '17

24 Dec '17

From: Al Viro <viro(a)zeniv.linux.org.uk> Signed-off-by: Al Viro <viro(a)zeniv.linux.org.uk> [sven(a)narfation.org: add compat code] Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- The patch is already in https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/log/?h=for-next --- compat-include/linux/types.h | 38 ++++++++++++++++++++++++++++++++++++++ net/batman-adv/icmp_socket.c | 2 +- net/batman-adv/log.c | 2 +- 3 files changed, 40 insertions(+), 2 deletions(-) create mode 100644 compat-include/linux/types.h diff --git a/compat-include/linux/types.h b/compat-include/linux/types.h new file mode 100644 index 00000000..f33f2bb2 --- /dev/null +++ b/compat-include/linux/types.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2007-2017 B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + * This file contains macros for maintaining compatibility with older versions + * of the Linux kernel. + */ + +#ifndef _NET_BATMAN_ADV_COMPAT_LINUX_TYPES_H_ +#define _NET_BATMAN_ADV_COMPAT_LINUX_TYPES_H_ + +#include <linux/version.h> +#include_next <linux/types.h> + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0) + +#ifdef __CHECK_POLL +typedef unsigned __bitwise __poll_t; +#else +typedef unsigned __poll_t; +#endif + +#endif /* < KERNEL_VERSION(4, 16, 0) */ + +#endif /* _NET_BATMAN_ADV_COMPAT_LINUX_TYPES_H_ */ diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c index 8041cf10..581375d0 100644 --- a/net/batman-adv/icmp_socket.c +++ b/net/batman-adv/icmp_socket.c @@ -297,7 +297,7 @@ static ssize_t batadv_socket_write(struct file *file, const char __user *buff, return len; } -static unsigned int batadv_socket_poll(struct file *file, poll_table *wait) +static __poll_t batadv_socket_poll(struct file *file, poll_table *wait) { struct batadv_socket_client *socket_client = file->private_data; diff --git a/net/batman-adv/log.c b/net/batman-adv/log.c index da004980..9be74a44 100644 --- a/net/batman-adv/log.c +++ b/net/batman-adv/log.c @@ -185,7 +185,7 @@ static ssize_t batadv_log_read(struct file *file, char __user *buf, return error; } -static unsigned int batadv_log_poll(struct file *file, poll_table *wait) +static __poll_t batadv_log_poll(struct file *file, poll_table *wait) { struct batadv_priv *bat_priv = file->private_data; struct batadv_priv_debug_log *debug_log = bat_priv->debug_log; -- 2.11.0

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[B.A.T.M.A.N.] [PATCH v4 0/5] flow_dissector: Provide basic batman-adv unicast handling
by Sven Eckelmann 21 Dec '17

21 Dec '17

Hi, we are currently starting to use batman-adv as mesh protocol on multicore embedded devices. These usually don't have a lot of CPU power per core but are reasonable fast when using multiple cores. It was noticed that sending was working very well but receiving was basically only using on CPU core per neighbor. The reason for that is format of the (normal) incoming packet: +--------------------+ | ip(v6)hdr | +--------------------+ | inner ethhdr | +--------------------+ | batadv unicast hdr | +--------------------+ | outer ethhdr | +--------------------+ The flow dissector will therefore stop after parsing the outer ethernet header and will not parse the actual ipv(4|6)/... header of the packet. Our assumption was now that it would help us to add minimal support to the flow dissector to jump over the batman-adv unicast and inner ethernet header (like in gre ETH_P_TEB). The patch was implemented in a slightly hacky way [1] and the results looked quite promising. I didn't get any feedback how the files should actually be named. So I am now just using the names from RFC v3 The discussion of the RFC v3 can be found in the related patches of https://patchwork.ozlabs.org/cover/849345/ The discussion of the RFC v2 can be found in the related patches of https://patchwork.ozlabs.org/cover/844783/ Changes in v4: ============== * added patch to change the u8/u16 to __u8/__u16 in include/uapi/linux/batadv_packet.h - requested by Willem de Bruijn <willemdebruijn.kernel(a)gmail.com> Changes in v3: ============== * removed change of uapi/linux/batman_adv.h to uapi/linux/batadv_genl.h - requested by Willem de Bruijn <willemdebruijn.kernel(a)gmail.com> * removed naming fixes for enums/defines in uapi/linux/batadv_genl.h - requested by Willem de Bruijn <willemdebruijn.kernel(a)gmail.com> * renamed uapi/linux/batadv.h to uapi/linux/batadv_packet.h * moved batadv dissector functionality in own function - requested by Tom Herbert <tom(a)herbertland.com> * added support for flags FLOW_DISSECTOR_F_STOP_AT_ENCAP and FLOW_DIS_ENCAPSULATION - requested by Willem de Bruijn <willemdebruijn.kernel(a)gmail.com> Changes in v2: ============== * removed the batman-adv unicast packet header definition from flow_dissector.c * moved the batman-adv packet.h/uapi headers around to provide the correct definitions to flow_dissector.c Kind regards, Sven Sven Eckelmann (5): batman-adv: Let packet.h include its headers directly batman-adv: Remove usage of BIT(x) in packet.h batman-adv: Remove kernel fixed width types in packet.h batman-adv: Convert packet.h to uapi header flow_dissector: Parse batman-adv unicast headers MAINTAINERS | 1 + .../packet.h => include/uapi/linux/batadv_packet.h | 245 +++++++++++---------- net/batman-adv/bat_iv_ogm.c | 2 +- net/batman-adv/bat_v.c | 2 +- net/batman-adv/bat_v_elp.c | 2 +- net/batman-adv/bat_v_ogm.c | 2 +- net/batman-adv/bridge_loop_avoidance.c | 2 +- net/batman-adv/distributed-arp-table.h | 2 +- net/batman-adv/fragmentation.c | 2 +- net/batman-adv/gateway_client.c | 2 +- net/batman-adv/gateway_common.c | 2 +- net/batman-adv/hard-interface.c | 2 +- net/batman-adv/icmp_socket.c | 2 +- net/batman-adv/main.c | 2 +- net/batman-adv/main.h | 4 +- net/batman-adv/multicast.c | 2 +- net/batman-adv/netlink.c | 2 +- net/batman-adv/network-coding.c | 2 +- net/batman-adv/routing.c | 2 +- net/batman-adv/send.h | 3 +- net/batman-adv/soft-interface.c | 2 +- net/batman-adv/sysfs.c | 2 +- net/batman-adv/tp_meter.c | 2 +- net/batman-adv/translation-table.c | 2 +- net/batman-adv/tvlv.c | 2 +- net/batman-adv/types.h | 3 +- net/core/flow_dissector.c | 57 +++++ 27 files changed, 205 insertions(+), 150 deletions(-) rename net/batman-adv/packet.h => include/uapi/linux/batadv_packet.h (85%) -- 2.11.0

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B.A.T.M.A.N December 2017