B.A.T.M.A.N October 2016

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

17 participants
57 discussions

[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] batman-adv: Deinline batadv_orig_hash_find, save 9024 bytes
by Denys Vlasenko 23 Oct '17

23 Oct '17

This function compiles to 473 bytes of machine code. 21 callsites. text data bss dec hex filename 95903266 20860288 35991552 152755106 91adba2 vmlinux_before 95894242 20860288 35991552 152746082 91ab862 vmlinux Signed-off-by: Denys Vlasenko <dvlasenk(a)redhat.com> CC: Marek Lindner <mareklindner(a)neomailbox.ch> CC: Simon Wunderlich <sw(a)simonwunderlich.de> CC: Antonio Quartulli <a(a)unstable.cc> CC: Sven Eckelmann <sven(a)narfation.org> CC: b.a.t.m.a.n(a)lists.open-mesh.org CC: linux-kernel(a)vger.kernel.org --- net/batman-adv/originator.c | 29 +++++++++++++++++++++++++++++ net/batman-adv/originator.h | 31 ++----------------------------- 2 files changed, 31 insertions(+), 29 deletions(-) diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index e4cbb07..bcf78f1 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -47,6 +47,36 @@ /* hash class keys */ static struct lock_class_key batadv_orig_hash_lock_class_key; +struct batadv_orig_node * +batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data) +{ + struct batadv_hashtable *hash = bat_priv->orig_hash; + struct hlist_head *head; + struct batadv_orig_node *orig_node, *orig_node_tmp = NULL; + int index; + + if (!hash) + return NULL; + + index = batadv_choose_orig(data, hash->size); + head = &hash->table[index]; + + rcu_read_lock(); + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + if (!batadv_compare_eth(orig_node, data)) + continue; + + if (!kref_get_unless_zero(&orig_node->refcount)) + continue; + + orig_node_tmp = orig_node; + break; + } + rcu_read_unlock(); + + return orig_node_tmp; +} + static void batadv_purge_orig(struct work_struct *work); /** diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h index 4e8b67f..db7a87d 100644 --- a/net/batman-adv/originator.h +++ b/net/batman-adv/originator.h @@ -96,34 +96,7 @@ static inline u32 batadv_choose_orig(const void *data, u32 size) return hash % size; } -static inline struct batadv_orig_node * -batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data) -{ - struct batadv_hashtable *hash = bat_priv->orig_hash; - struct hlist_head *head; - struct batadv_orig_node *orig_node, *orig_node_tmp = NULL; - int index; - - if (!hash) - return NULL; - - index = batadv_choose_orig(data, hash->size); - head = &hash->table[index]; - - rcu_read_lock(); - hlist_for_each_entry_rcu(orig_node, head, hash_entry) { - if (!batadv_compare_eth(orig_node, data)) - continue; - - if (!kref_get_unless_zero(&orig_node->refcount)) - continue; - - orig_node_tmp = orig_node; - break; - } - rcu_read_unlock(); - - return orig_node_tmp; -} +struct batadv_orig_node * +batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data); #endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */ -- 1.8.1.4

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[B.A.T.M.A.N.] [PATCH v7 1/5] batman-adv: prevent multiple ARP replies sent by gateways if dat enabled
by Sven Eckelmann 16 Feb '17

16 Feb '17

From: Andreas Pape <APape(a)phoenixcontact.com> If dat is enabled it must be made sure that only the backbone gw which has claimed the remote destination for the ARP request answers the ARP request directly if the MAC address is known due to the local dat table. This prevents multiple ARP replies in a common backbone if more than one gateway already knows the remote mac searched for in the ARP request. Signed-off-by: Andreas Pape <apape(a)phoenixcontact.com> Acked-by: Simon Wunderlich <sw(a)simonwunderlich.de> [sven(a)narfation.org: fix conflicts with current version] Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/bridge_loop_avoidance.c | 49 ++++++++++++++++++++++++++++++++++ net/batman-adv/bridge_loop_avoidance.h | 11 ++++++++ net/batman-adv/distributed-arp-table.c | 15 +++++++++++ 3 files changed, 75 insertions(+) diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index e7f690b..41ab4a6 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -2450,3 +2450,52 @@ out: return ret; } + +#ifdef CONFIG_BATMAN_ADV_DAT +/** + * batadv_bla_check_claim - check if address is claimed + * + * @bat_priv: the bat priv with all the soft interface information + * @addr: mac address of which the claim status is checked + * @vid: the VLAN ID + * + * addr is checked if this address is claimed by the local device itself. + * + * Return: true if bla is disabled or the mac is claimed by the device, + * false if the device addr is already claimed by another gateway + */ +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, + u8 *addr, unsigned short vid) +{ + struct batadv_bla_claim search_claim; + struct batadv_bla_claim *claim = NULL; + struct batadv_hard_iface *primary_if = NULL; + bool ret = true; + + if (!atomic_read(&bat_priv->bridge_loop_avoidance)) + return ret; + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (!primary_if) + return ret; + + /* First look if the mac address is claimed */ + ether_addr_copy(search_claim.addr, addr); + search_claim.vid = vid; + + claim = batadv_claim_hash_find(bat_priv, &search_claim); + + /* If there is a claim and we are not owner of the claim, + * return false. + */ + if (claim) { + if (!batadv_compare_eth(claim->backbone_gw->orig, + primary_if->net_dev->dev_addr)) + ret = false; + batadv_claim_put(claim); + } + + batadv_hardif_put(primary_if); + return ret; +} +#endif diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h index 1ae93e4..86b8740 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -51,6 +51,10 @@ 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); +#ifdef CONFIG_BATMAN_ADV_DAT +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr, + unsigned short vid); +#endif #define BATADV_BLA_CRC_INIT 0 #else /* ifdef CONFIG_BATMAN_ADV_BLA */ @@ -127,6 +131,13 @@ static inline int batadv_bla_backbone_dump(struct sk_buff *msg, return -EOPNOTSUPP; } +static inline +bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr, + unsigned short vid) +{ + return true; +} + #endif /* ifdef CONFIG_BATMAN_ADV_BLA */ #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */ diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index e257efd..cf53404 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -43,6 +43,7 @@ #include <linux/workqueue.h> #include <net/arp.h> +#include "bridge_loop_avoidance.h" #include "hard-interface.h" #include "hash.h" #include "log.h" @@ -1007,6 +1008,20 @@ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, goto out; } + /* If BLA is enabled, only send ARP replies if we have claimed + * the destination for the ARP request or if no one else of + * the backbone gws belonging to our backbone has claimed the + * destination. + */ + if (!batadv_bla_check_claim(bat_priv, + dat_entry->mac_addr, vid)) { + batadv_dbg(BATADV_DBG_DAT, bat_priv, + "Device %pM claimed by another backbone gw. Don't send ARP reply!", + dat_entry->mac_addr); + ret = true; + goto out; + } + skb_new = arp_create(ARPOP_REPLY, ETH_P_ARP, ip_src, bat_priv->soft_iface, ip_dst, hw_src, dat_entry->mac_addr, hw_src); -- 2.9.3

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[B.A.T.M.A.N.] [PATCH v2 0/4] Broadcast Avoidances, Neighborhood Hash
by Linus Lüssing 28 Jan '17

28 Jan '17

Hi, Here's the second broadcast avoidance patchset (rebased on the former one). Hopefully, those two patchsets together should be an automatic approach and replacement for the (non-upstream) no-rebroadcast flag patch and the cases it is currently used for. Documentation: * https://www.open-mesh.org/projects/batman-adv/wiki/Broadcast-Avoidances Branch: * https://git.open-mesh.org/batman-adv.git/shortlog/refs/heads/linus/neighhash Regards, Linus

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[B.A.T.M.A.N.] [PATCH 0/6] batman-adv: Revert coccinelle compat support
by Sven Eckelmann 08 Nov '16

08 Nov '16

Hi, it seems that the coccinelle package in Debian Jessie is not able to parse semantic patches [1]. This basically breaks the batman-adv build on many stable systems and thus makes the out-of-tree module unusable on these systems. I have currently no better idea than reverting these patches. Kind regards, Sven PS: Linus, do you want to try to get rid of replacement.sh? [1] https://www.open-mesh.org/issues/303

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[B.A.T.M.A.N.] [PATCH maint] batman-adv: Detect missing primaryif during tp_send as error
by Sven Eckelmann 04 Nov '16

04 Nov '16

The throughput meter detects different situations as problems for the current test. It stops the test after these and reports it to userspace. This also has to be done when the primary interface disappeared during the test. Fixes: 98d7a766b645 ("batman-adv: throughput meter implementation") Reported-by: Joe Perches <joe(a)perches.com> Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/tp_meter.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c index 2333777..8af1611 100644 --- a/net/batman-adv/tp_meter.c +++ b/net/batman-adv/tp_meter.c @@ -837,6 +837,7 @@ static int batadv_tp_send(void *arg) primary_if = batadv_primary_if_get_selected(bat_priv); if (unlikely(!primary_if)) { err = BATADV_TP_REASON_DST_UNREACHABLE; + tp_vars->reason = err; goto out; } -- 2.10.1

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[B.A.T.M.A.N.] [PATCH maint v3] batman-adv: Install module in $INSTALL_MOD_DIR/updates/net/batman-adv
by Sven Eckelmann 01 Nov '16

01 Nov '16

depmod may skip the batman-adv.ko module in the $INSTALL_MOD_DIR/update/ folder when it contains the word "build" as directory name. Avoid this extra directory "build" in the installation path by making the obj-y dir relative to build/ in the source directory. Reported-by: Jean-Jacques Sarton <jj.sarton(a)t-online.de> Fixes: 66ac14a09445 ("batman-adv: Introduce compat-patches support") Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- v3: - adjust commit message v2: - Remove clean target change which was accidentally added to this patch Makefile | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/Makefile b/Makefile index 1d2e01c..e9c499f 100644 --- a/Makefile +++ b/Makefile @@ -54,6 +54,7 @@ PATCH_FLAGS = --batch --fuzz=0 --forward --strip=1 --unified --version-control=n PATCH := patch $(PATCH_FLAGS) -i SPATCH_FLAGS := --in-place --relax-include-path --use-coccigrep --very-quiet CP := cp -fpR +LN := ln -sf SOURCE = $(wildcard net/batman-adv/*.[ch]) net/batman-adv/Makefile SOURCE_BUILD = $(wildcard $(BUILD_DIR)/net/batman-adv/*.[ch]) $(BUILD_DIR)/net/batman-adv/Makefile @@ -63,25 +64,25 @@ REVISION= $(shell if [ -d "$(PWD)/.git" ]; then \ echo $$(git --git-dir="$(PWD)/.git" describe --always --dirty --match "v*" |sed 's/^v//' 2> /dev/null || echo "[unknown]"); \ fi) NOSTDINC_FLAGS += \ - -I$(PWD)/compat-include/ \ - -I$(PWD)/include/ \ - -include $(PWD)/compat.h \ + -I$(PWD)/../compat-include/ \ + -I$(PWD)/../include/ \ + -include $(PWD)/../compat.h \ $(CFLAGS) ifneq ($(REVISION),) NOSTDINC_FLAGS += -DBATADV_SOURCE_VERSION=\"$(REVISION)\" endif -include $(PWD)/compat-sources/Makefile +-include $(PWD)/../compat-sources/Makefile -obj-y += build/net/batman-adv/ +obj-y += net/batman-adv/ export batman-adv-y BUILD_FLAGS := \ - M=$(PWD) \ - PWD=$(PWD) \ + M=$(BUILD_DIR) \ + PWD=$(BUILD_DIR) \ REVISION=$(REVISION) \ CONFIG_BATMAN_ADV=m \ CONFIG_BATMAN_ADV_DEBUG=$(CONFIG_BATMAN_ADV_DEBUG) \ @@ -109,6 +110,7 @@ config: $(SOURCE_STAMP): $(SOURCE) compat-patches/* $(MKDIR) $(BUILD_DIR)/net/batman-adv/ + @$(LN) ../Makefile $(BUILD_DIR)/Makefile @$(RM) $(SOURCE_BUILD) @$(CP) $(SOURCE) $(BUILD_DIR)/net/batman-adv/ @set -e; \

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[B.A.T.M.A.N.] [PATCH] batman-adv: Add module alias for batadv netlink family
by Sven Eckelmann 01 Nov '16

01 Nov '16

The batman-adv module has to be loaded to fulfill genl request by the userspace. When it is not loaded then requests will fail. It is therefore useful to get the module automatically loaded when such a request is made. Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- net/batman-adv/main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index 6b5dae6..d46415e 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -23,6 +23,7 @@ #include <linux/crc32c.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/genetlink.h> #include <linux/if_ether.h> #include <linux/if_vlan.h> #include <linux/init.h> @@ -44,6 +45,7 @@ #include <linux/workqueue.h> #include <net/dsfield.h> #include <net/rtnetlink.h> +#include <uapi/linux/batman_adv.h> #include "bat_algo.h" #include "bat_iv_ogm.h" @@ -648,3 +650,4 @@ MODULE_DESCRIPTION(BATADV_DRIVER_DESC); MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE); MODULE_VERSION(BATADV_SOURCE_VERSION); MODULE_ALIAS_RTNL_LINK("batadv"); +MODULE_ALIAS_GENL_FAMILY(BATADV_NL_NAME); -- 2.10.1

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[B.A.T.M.A.N.] [PATCH 1/3] batman-adv: genetlink: no longer support using static family IDs
by Sven Eckelmann 01 Nov '16

01 Nov '16

From: Johannes Berg <johannes.berg(a)intel.com> Static family IDs have never really been used, the only use case was the workaround I introduced for those users that assumed their family ID was also their multicast group ID. Additionally, because static family IDs would never be reserved by the generic netlink code, using a relatively low ID would only work for built-in families that can be registered immediately after generic netlink is started, which is basically only the control family (apart from the workaround code, which I also had to add code for so it would reserve those IDs) Thus, anything other than GENL_ID_GENERATE is flawed and luckily not used except in the cases I mentioned. Move those workarounds into a few lines of code, and then get rid of GENL_ID_GENERATE entirely, making it more robust. Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sven Eckelmann <sven(a)narfation.org> --- Patch already in net-next net/batman-adv/netlink.c | 1 - 1 file changed, 1 deletion(-) diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c index aee20a3..a951e02 100644 --- a/net/batman-adv/netlink.c +++ b/net/batman-adv/netlink.c @@ -49,7 +49,6 @@ #include "translation-table.h" struct genl_family batadv_netlink_family = { - .id = GENL_ID_GENERATE, .hdrsize = 0, .name = BATADV_NL_NAME, .version = 1, -- 2.10.1

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[B.A.T.M.A.N.] [PATCH v3 0/2] batman-adv: hard interface removal fixes
by Linus Lüssing 31 Oct '16

31 Oct '16

Hi, This patchset contains another, revived patch (1/2). As we had quite some trouble validating the patches back then in Aalborg, I tried to push the overall structure in a hopefully easier to read and comprehend, API like style. While keeping the initial idea (that is, steal and claim forwarding packets from the queue under spinlock, then wait and free without spinlock as a second step) intact. The second patch is another kernel splat I came across while playing with msleep(s)/mdelay()s in the purging routines. Regards, Linus PS: Especially for 1/2 I'm unsure whether to target it for maint/stable. It didn't seem to be a show stopper for anyone within the last three years (had been the only one reporting it at #168, I think?). And the fix is difficult to do as one-liners, unless risking to introduce new race conditions.

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B.A.T.M.A.N October 2016