diff options
author | David S. Miller <davem@davemloft.net> | 2017-04-06 14:37:50 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-04-06 14:37:50 -0700 |
commit | bd414860440eebc8a7eb54be94c97e6ed09bb402 (patch) | |
tree | e059b250b46a8e8cbcb54eff50d6d10ffd68baa7 | |
parent | 54280168f3d9870e0d2b169b991189a09fc870b2 (diff) | |
parent | ab044f8e3eaf84c4cc95d7606fadfdfa006dc8ec (diff) |
Merge tag 'batadv-next-for-davem-20170406' of git://git.open-mesh.org/linux-merge
Simon Wunderlich says:
====================
This feature/cleanup patchset includes the following patches:
- bump version strings, by Simon Wunderlich
- Code and Style cleanups, by Sven Eckelmann (5 patches)
- Remove an unneccessary memset, by Tobias Klauser
- DAT and BLA optimizations for various corner cases, by Andreas Pape
(5 patches)
- forward/rebroadcast packet restructuring, by Linus Luessing
(2 patches)
- ethtool cleanup and remove unncessary code, by Sven Eckelmann
(4 patches)
- use net_device_stats from net_device instead of private copy,
by Tobias Klauser
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 17 | ||||
-rw-r--r-- | net/batman-adv/bridge_loop_avoidance.c | 123 | ||||
-rw-r--r-- | net/batman-adv/bridge_loop_avoidance.h | 11 | ||||
-rw-r--r-- | net/batman-adv/distributed-arp-table.c | 64 | ||||
-rw-r--r-- | net/batman-adv/log.h | 5 | ||||
-rw-r--r-- | net/batman-adv/main.c | 3 | ||||
-rw-r--r-- | net/batman-adv/main.h | 18 | ||||
-rw-r--r-- | net/batman-adv/multicast.c | 12 | ||||
-rw-r--r-- | net/batman-adv/routing.c | 25 | ||||
-rw-r--r-- | net/batman-adv/send.c | 76 | ||||
-rw-r--r-- | net/batman-adv/send.h | 4 | ||||
-rw-r--r-- | net/batman-adv/soft-interface.c | 238 | ||||
-rw-r--r-- | net/batman-adv/tp_meter.c | 7 | ||||
-rw-r--r-- | net/batman-adv/translation-table.c | 42 | ||||
-rw-r--r-- | net/batman-adv/types.h | 6 |
15 files changed, 413 insertions, 238 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 71343d0fec94..495ba7cdcb04 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -679,15 +679,11 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); struct batadv_forw_packet *forw_packet_aggr; + struct sk_buff *skb; unsigned char *skb_buff; unsigned int skb_size; atomic_t *queue_left = own_packet ? NULL : &bat_priv->batman_queue_left; - forw_packet_aggr = batadv_forw_packet_alloc(if_incoming, if_outgoing, - queue_left, bat_priv); - if (!forw_packet_aggr) - return; - if (atomic_read(&bat_priv->aggregated_ogms) && packet_len < BATADV_MAX_AGGREGATION_BYTES) skb_size = BATADV_MAX_AGGREGATION_BYTES; @@ -696,9 +692,14 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, skb_size += ETH_HLEN; - forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); - if (!forw_packet_aggr->skb) { - batadv_forw_packet_free(forw_packet_aggr, true); + skb = netdev_alloc_skb_ip_align(NULL, skb_size); + if (!skb) + return; + + forw_packet_aggr = batadv_forw_packet_alloc(if_incoming, if_outgoing, + queue_left, bat_priv, skb); + if (!forw_packet_aggr) { + kfree_skb(skb); return; } diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index ba8420d8a992..d07e89ec8467 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -395,7 +395,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, ether_addr_copy(ethhdr->h_source, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): CLAIM %pM on vid %d\n", mac, - BATADV_PRINT_VID(vid)); + batadv_print_vid(vid)); break; case BATADV_CLAIM_TYPE_UNCLAIM: /* unclaim frame @@ -404,7 +404,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, ether_addr_copy(hw_src, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): UNCLAIM %pM on vid %d\n", mac, - BATADV_PRINT_VID(vid)); + batadv_print_vid(vid)); break; case BATADV_CLAIM_TYPE_ANNOUNCE: /* announcement frame @@ -413,7 +413,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, ether_addr_copy(hw_src, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): ANNOUNCE of %pM on vid %d\n", - ethhdr->h_source, BATADV_PRINT_VID(vid)); + ethhdr->h_source, batadv_print_vid(vid)); break; case BATADV_CLAIM_TYPE_REQUEST: /* request frame @@ -425,14 +425,14 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): REQUEST of %pM to %pM on vid %d\n", ethhdr->h_source, ethhdr->h_dest, - BATADV_PRINT_VID(vid)); + batadv_print_vid(vid)); break; case BATADV_CLAIM_TYPE_LOOPDETECT: ether_addr_copy(ethhdr->h_source, mac); batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_send_claim(): LOOPDETECT of %pM to %pM on vid %d\n", ethhdr->h_source, ethhdr->h_dest, - BATADV_PRINT_VID(vid)); + batadv_print_vid(vid)); break; } @@ -475,9 +475,9 @@ static void batadv_bla_loopdetect_report(struct work_struct *work) batadv_info(bat_priv->soft_iface, "Possible loop on VLAN %d detected which can't be handled by BLA - please check your network setup!\n", - BATADV_PRINT_VID(backbone_gw->vid)); + batadv_print_vid(backbone_gw->vid)); snprintf(vid_str, sizeof(vid_str), "%d", - BATADV_PRINT_VID(backbone_gw->vid)); + batadv_print_vid(backbone_gw->vid)); vid_str[sizeof(vid_str) - 1] = 0; batadv_throw_uevent(bat_priv, BATADV_UEV_BLA, BATADV_UEV_LOOPDETECT, @@ -510,7 +510,7 @@ batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, u8 *orig, batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_get_backbone_gw(): not found (%pM, %d), creating new entry\n", - orig, BATADV_PRINT_VID(vid)); + orig, batadv_print_vid(vid)); entry = kzalloc(sizeof(*entry), GFP_ATOMIC); if (!entry) @@ -719,7 +719,7 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv, batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_add_claim(): adding new entry %pM, vid %d to hash ...\n", - mac, BATADV_PRINT_VID(vid)); + mac, batadv_print_vid(vid)); kref_get(&claim->refcount); hash_added = batadv_hash_add(bat_priv->bla.claim_hash, @@ -739,8 +739,8 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv, goto claim_free_ref; batadv_dbg(BATADV_DBG_BLA, bat_priv, - "bla_add_claim(): changing ownership for %pM, vid %d\n", - mac, BATADV_PRINT_VID(vid)); + "bla_add_claim(): changing ownership for %pM, vid %d to gw %pM\n", + mac, batadv_print_vid(vid), backbone_gw->orig); remove_crc = true; } @@ -809,7 +809,7 @@ static void batadv_bla_del_claim(struct batadv_priv *bat_priv, return; batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_del_claim(): %pM, vid %d\n", - mac, BATADV_PRINT_VID(vid)); + mac, batadv_print_vid(vid)); batadv_hash_remove(bat_priv->bla.claim_hash, batadv_compare_claim, batadv_choose_claim, claim); @@ -849,7 +849,7 @@ static bool batadv_handle_announce(struct batadv_priv *bat_priv, u8 *an_addr, batadv_dbg(BATADV_DBG_BLA, bat_priv, "handle_announce(): ANNOUNCE vid %d (sent by %pM)... CRC = %#.4x\n", - BATADV_PRINT_VID(vid), backbone_gw->orig, crc); + batadv_print_vid(vid), backbone_gw->orig, crc); spin_lock_bh(&backbone_gw->crc_lock); backbone_crc = backbone_gw->crc; @@ -859,7 +859,7 @@ static bool batadv_handle_announce(struct batadv_priv *bat_priv, u8 *an_addr, batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv, "handle_announce(): CRC FAILED for %pM/%d (my = %#.4x, sent = %#.4x)\n", backbone_gw->orig, - BATADV_PRINT_VID(backbone_gw->vid), + batadv_print_vid(backbone_gw->vid), backbone_crc, crc); batadv_bla_send_request(backbone_gw); @@ -904,7 +904,7 @@ static bool batadv_handle_request(struct batadv_priv *bat_priv, batadv_dbg(BATADV_DBG_BLA, bat_priv, "handle_request(): REQUEST vid %d (sent by %pM)...\n", - BATADV_PRINT_VID(vid), ethhdr->h_source); + batadv_print_vid(vid), ethhdr->h_source); batadv_bla_answer_request(bat_priv, primary_if, vid); return true; @@ -941,7 +941,7 @@ static bool batadv_handle_unclaim(struct batadv_priv *bat_priv, /* this must be an UNCLAIM frame */ batadv_dbg(BATADV_DBG_BLA, bat_priv, "handle_unclaim(): UNCLAIM %pM on vid %d (sent by %pM)...\n", - claim_addr, BATADV_PRINT_VID(vid), backbone_gw->orig); + claim_addr, batadv_print_vid(vid), backbone_gw->orig); batadv_bla_del_claim(bat_priv, claim_addr, vid); batadv_backbone_gw_put(backbone_gw); @@ -1161,7 +1161,7 @@ static bool batadv_bla_process_claim(struct batadv_priv *bat_priv, if (ret == 1) batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_process_claim(): received a claim frame from another group. From: %pM on vid %d ...(hw_src %pM, hw_dst %pM)\n", - ethhdr->h_source, BATADV_PRINT_VID(vid), hw_src, + ethhdr->h_source, batadv_print_vid(vid), hw_src, hw_dst); if (ret < 2) @@ -1197,7 +1197,7 @@ static bool batadv_bla_process_claim(struct batadv_priv *bat_priv, batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_process_claim(): ERROR - this looks like a claim frame, but is useless. eth src %pM on vid %d ...(hw_src %pM, hw_dst %pM)\n", - ethhdr->h_source, BATADV_PRINT_VID(vid), hw_src, hw_dst); + ethhdr->h_source, batadv_print_vid(vid), hw_src, hw_dst); return true; } @@ -1295,10 +1295,13 @@ static void batadv_bla_purge_claims(struct batadv_priv *bat_priv, goto skip; batadv_dbg(BATADV_DBG_BLA, bat_priv, - "bla_purge_claims(): %pM, vid %d, time out\n", - claim->addr, claim->vid); + "bla_purge_claims(): timed out.\n"); purge_now: + batadv_dbg(BATADV_DBG_BLA, bat_priv, + "bla_purge_claims(): %pM, vid %d\n", + claim->addr, claim->vid); + batadv_handle_unclaim(bat_priv, primary_if, backbone_gw->orig, claim->addr, claim->vid); @@ -1846,6 +1849,13 @@ bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, /* possible optimization: race for a claim */ /* 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); @@ -1963,10 +1973,22 @@ bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, /* if yes, the client has roamed and we have * to unclaim it. */ - batadv_handle_unclaim(bat_priv, primary_if, - primary_if->net_dev->dev_addr, - ethhdr->h_source, vid); - goto allow; + if (batadv_has_timed_out(claim->lasttime, 100)) { + /* only unclaim if the last claim entry is + * older than 100 ms to make sure we really + * have a roaming client here. + */ + batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_tx(): Roaming client %pM detected. Unclaim it.\n", + ethhdr->h_source); + batadv_handle_unclaim(bat_priv, primary_if, + primary_if->net_dev->dev_addr, + ethhdr->h_source, vid); + goto allow; + } else { + batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_tx(): Race for claim %pM detected. Drop packet.\n", + ethhdr->h_source); + goto handled; + } } /* check if it is a multicast/broadcast frame */ @@ -2042,7 +2064,7 @@ int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset) backbone_crc = backbone_gw->crc; spin_unlock_bh(&backbone_gw->crc_lock); seq_printf(seq, " * %pM on %5d by %pM [%c] (%#.4x)\n", - claim->addr, BATADV_PRINT_VID(claim->vid), + claim->addr, batadv_print_vid(claim->vid), backbone_gw->orig, (is_own ? 'x' : ' '), backbone_crc); @@ -2274,7 +2296,7 @@ int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset) seq_printf(seq, " * %pM on %5d %4i.%03is (%#.4x)\n", backbone_gw->orig, - BATADV_PRINT_VID(backbone_gw->vid), secs, + batadv_print_vid(backbone_gw->vid), secs, msecs, backbone_crc); } rcu_read_unlock(); @@ -2449,3 +2471,52 @@ 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 e157986bd01c..234775748b8e 100644 --- a/net/batman-adv/bridge_loop_avoidance.h +++ b/net/batman-adv/bridge_loop_avoidance.h @@ -69,6 +69,10 @@ 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 */ @@ -145,6 +149,13 @@ 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 1bfd1dbc2feb..013e970eff39 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" @@ -330,7 +331,7 @@ static void batadv_dat_entry_add(struct batadv_priv *bat_priv, __be32 ip, batadv_dbg(BATADV_DBG_DAT, bat_priv, "Entry updated: %pI4 %pM (vid: %d)\n", &dat_entry->ip, dat_entry->mac_addr, - BATADV_PRINT_VID(vid)); + batadv_print_vid(vid)); goto out; } @@ -356,7 +357,7 @@ static void batadv_dat_entry_add(struct batadv_priv *bat_priv, __be32 ip, } batadv_dbg(BATADV_DBG_DAT, bat_priv, "New entry added: %pI4 %pM (vid: %d)\n", - &dat_entry->ip, dat_entry->mac_addr, BATADV_PRINT_VID(vid)); + &dat_entry->ip, dat_entry->mac_addr, batadv_print_vid(vid)); out: if (dat_entry) @@ -835,7 +836,7 @@ int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset) seq_printf(seq, " * %15pI4 %14pM %4i %6i:%02i\n", &dat_entry->ip, dat_entry->mac_addr, - BATADV_PRINT_VID(dat_entry->vid), + batadv_print_vid(dat_entry->vid), last_seen_mins, last_seen_secs); } rcu_read_unlock(); @@ -1002,6 +1003,7 @@ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, bool ret = false; struct batadv_dat_entry *dat_entry = NULL; struct sk_buff *skb_new; + struct net_device *soft_iface = bat_priv->soft_iface; int hdr_size = 0; unsigned short vid; @@ -1040,16 +1042,30 @@ 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 = batadv_dat_arp_create_reply(bat_priv, ip_dst, ip_src, dat_entry->mac_addr, hw_src, vid); if (!skb_new) goto out; - skb_new->protocol = eth_type_trans(skb_new, - bat_priv->soft_iface); - bat_priv->stats.rx_packets++; - bat_priv->stats.rx_bytes += skb->len + ETH_HLEN + hdr_size; + skb_new->protocol = eth_type_trans(skb_new, soft_iface); + + soft_iface->stats.rx_packets++; + soft_iface->stats.rx_bytes += skb->len + ETH_HLEN + hdr_size; netif_rx(skb_new); batadv_dbg(BATADV_DBG_DAT, bat_priv, "ARP request replied locally\n"); @@ -1188,6 +1204,7 @@ void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, struct sk_buff *skb, int hdr_size) { + struct batadv_dat_entry *dat_entry = NULL; u16 type; __be32 ip_src, ip_dst; u8 *hw_src, *hw_dst; @@ -1210,12 +1227,41 @@ bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, hw_dst = batadv_arp_hw_dst(skb, hdr_size); ip_dst = batadv_arp_ip_dst(skb, hdr_size); + /* If ip_dst is already in cache and has the right mac address, + * drop this frame if this ARP reply is destined for us because it's + * most probably an ARP reply generated by another node of the DHT. + * We have most probably received already a reply earlier. Delivering + * this frame would lead to doubled receive of an ARP reply. + */ + dat_entry = batadv_dat_entry_hash_find(bat_priv, ip_src, vid); + if (dat_entry && batadv_compare_eth(hw_src, dat_entry->mac_addr)) { + batadv_dbg(BATADV_DBG_DAT, bat_priv, "Doubled ARP reply removed: ARP MSG = [src: %pM-%pI4 dst: %pM-%pI4]; dat_entry: %pM-%pI4\n", + hw_src, &ip_src, hw_dst, &ip_dst, + dat_entry->mac_addr, &dat_entry->ip); + dropped = true; + goto out; + } + /* Update our internal cache with both the IP addresses the node got * within the ARP reply */ batadv_dat_entry_add(bat_priv, ip_src, hw_src, vid); batadv_dat_entry_add(bat_priv, ip_dst, hw_dst, vid); + /* If BLA is enabled, only forward ARP replies if we have claimed the + * source of the ARP reply or if no one else of the same backbone has + * already claimed that client. This prevents that different gateways + * to the same backbone all forward the ARP reply leading to multiple + * replies in the backbone. + */ + if (!batadv_bla_check_claim(bat_priv, hw_src, vid)) { + batadv_dbg(BATADV_DBG_DAT, bat_priv, + "Device %pM claimed by another backbone gw. Drop ARP reply.\n", + hw_src); + dropped = true; + goto out; + } + /* if this REPLY is directed to a client of mine, let's deliver the * packet to the interface */ @@ -1228,6 +1274,8 @@ bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, out: if (dropped) kfree_skb(skb); + if (dat_entry) + batadv_dat_entry_put(dat_entry); /* if dropped == false -> deliver to the interface */ return dropped; } @@ -1256,7 +1304,7 @@ bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, /* If this packet is an ARP_REQUEST and the node already has the * information that it is going to ask, then the packet can be dropped */ - if (forw_packet->num_packets) + if (batadv_forw_packet_is_rebroadcast(forw_packet)) goto out; vid = batadv_dat_get_vid(forw_packet->skb, &hdr_size); diff --git a/net/batman-adv/log.h b/net/batman-adv/log.h index 7a2b9f4da078..65ce97efa6b5 100644 --- a/net/batman-adv/log.h +++ b/net/batman-adv/log.h @@ -73,9 +73,10 @@ __printf(2, 3); /* possibly ratelimited debug output */ #define _batadv_dbg(type, bat_priv, ratelimited, fmt, arg...) \ do { \ - if (atomic_read(&(bat_priv)->log_level) & (type) && \ + struct batadv_priv *__batpriv = (bat_priv); \ + if (atomic_read(&__batpriv->log_level) & (type) && \ (!(ratelimited) || net_ratelimit())) \ - batadv_debug_log(bat_priv, fmt, ## arg); \ + batadv_debug_log(__batpriv, fmt, ## arg); \ } \ while (0) #else /* !CONFIG_BATMAN_ADV_DEBUG */ diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index 5000c540614d..fb381fb26a66 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -516,6 +516,9 @@ static void batadv_recv_handler_init(void) BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_change) != 12); BUILD_BUG_ON(sizeof(struct batadv_tvlv_roam_adv) != 8); + i = FIELD_SIZEOF(struct sk_buff, cb); + BUILD_BUG_ON(sizeof(struct batadv_skb_cb) > i); + /* broadcast packet */ batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index 57a8103dbce7..810f7d026f54 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -24,7 +24,7 @@ #define BATADV_DRIVER_DEVICE "batman-adv" #ifndef BATADV_SOURCE_VERSION -#define BATADV_SOURCE_VERSION "2017.0" +#define BATADV_SOURCE_VERSION "2017.1" #endif /* B.A.T.M.A.N. parameters */ @@ -193,6 +193,7 @@ enum batadv_uev_type { #include <linux/percpu.h> #include <linux/types.h> +#include "packet.h" #include "types.h" struct net_device; @@ -200,8 +201,19 @@ struct packet_type; struct seq_file; struct sk_buff; -#define BATADV_PRINT_VID(vid) (((vid) & BATADV_VLAN_HAS_TAG) ? \ - (int)((vid) & VLAN_VID_MASK) : -1) +/** + * batadv_print_vid - return printable version of vid information + * @vid: the VLAN identifier + * + * Return: -1 when no VLAN is used, VLAN id otherwise + */ +static inline int batadv_print_vid(unsigned short vid) +{ + if (vid & BATADV_VLAN_HAS_TAG) + return (int)(vid & VLAN_VID_MASK); + else + return -1; +} extern struct list_head batadv_hardif_list; diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c index 952ba81a565b..d327670641ac 100644 --- a/net/batman-adv/multicast.c +++ b/net/batman-adv/multicast.c @@ -494,9 +494,8 @@ static bool batadv_mcast_mla_tvlv_update(struct batadv_priv *bat_priv) if (!bridged) goto update; -#if !IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) - pr_warn_once("No bridge IGMP snooping compiled - multicast optimizations disabled\n"); -#endif + if (!IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)) + pr_warn_once("No bridge IGMP snooping compiled - multicast optimizations disabled\n"); querier4.exists = br_multicast_has_querier_anywhere(dev, ETH_P_IP); querier4.shadowing = br_multicast_has_querier_adjacent(dev, ETH_P_IP); @@ -671,7 +670,6 @@ static int batadv_mcast_forw_mode_check_ipv4(struct batadv_priv *bat_priv, return 0; } -#if IS_ENABLED(CONFIG_IPV6) /** * batadv_mcast_is_report_ipv6 - check for MLD reports * @skb: the ethernet frame destined for the mesh @@ -736,7 +734,6 @@ static int batadv_mcast_forw_mode_check_ipv6(struct batadv_priv *bat_priv, return 0; } -#endif /** * batadv_mcast_forw_mode_check - check for optimized forwarding potential @@ -765,11 +762,12 @@ static int batadv_mcast_forw_mode_check(struct batadv_priv *bat_priv, case ETH_P_IP: return batadv_mcast_forw_mode_check_ipv4(bat_priv, skb, is_unsnoopable); -#if IS_ENABLED(CONFIG_IPV6) case ETH_P_IPV6: + if (!IS_ENABLED(CONFIG_IPV6)) + return -EINVAL; + return batadv_mcast_forw_mode_check_ipv6(bat_priv, skb, is_unsnoopable); -#endif default: return -EINVAL; } diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 7fd740b6e36d..e1ebe14ee2a6 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -941,15 +941,17 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, struct batadv_priv *bat_priv = netdev_priv(recv_if->soft_iface); struct batadv_unicast_packet *unicast_packet; struct batadv_unicast_4addr_packet *unicast_4addr_packet; - u8 *orig_addr; - struct batadv_orig_node *orig_node = NULL; + u8 *orig_addr, *orig_addr_gw; + struct batadv_orig_node *orig_node = NULL, *orig_node_gw = NULL; int check, hdr_size = sizeof(*unicast_packet); enum batadv_subtype subtype; - bool is4addr; + struct ethhdr *ethhdr; int ret = NET_RX_DROP; + bool is4addr, is_gw; unicast_packet = (struct batadv_unicast_packet *)skb->data; unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; + ethhdr = eth_hdr(skb); is4addr = unicast_packet->packet_type == BATADV_UNICAST_4ADDR; /* the caller function should have already pulled 2 bytes */ @@ -972,6 +974,23 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, /* packet for me */ if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) { + /* If this is a unicast packet from another backgone gw, + * drop it. + */ + orig_addr_gw = ethhdr->h_source; + orig_node_gw = batadv_orig_hash_find(bat_priv, orig_addr_gw); + if (orig_node_gw) { + is_gw = batadv_bla_is_backbone_gw(skb, orig_node_gw, + hdr_size); + batadv_orig_node_put(orig_node_gw); + if (is_gw) { + batadv_dbg(BATADV_DBG_BLA, bat_priv, + "recv_unicast_packet(): Dropped unicast pkt received from another backbone gw %pM.\n", + orig_addr_gw); + return NET_RX_DROP; + } + } + if (is4addr) { subtype = unicast_4addr_packet->subtype; batadv_dat_inc_counter(bat_priv, subtype); diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index 1489ec27daff..403df596a73d 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/send.c @@ -482,6 +482,7 @@ void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet, * @if_outgoing: The (optional) if_outgoing to be grabbed * @queue_left: The (optional) queue counter to decrease * @bat_priv: The bat_priv for the mesh of this forw_packet + * @skb: The raw packet this forwarding packet shall contain * * Allocates a forwarding packet and tries to get a reference to the * (optional) if_incoming, if_outgoing and queue_left. If queue_left @@ -493,7 +494,8 @@ struct batadv_forw_packet * batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming, struct batadv_hard_iface *if_outgoing, atomic_t *queue_left, - struct batadv_priv *bat_priv) + struct batadv_priv *bat_priv, + struct sk_buff *skb) { struct batadv_forw_packet *forw_packet; const char *qname; @@ -525,7 +527,7 @@ batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming, INIT_HLIST_NODE(&forw_packet->list); INIT_HLIST_NODE(&forw_packet->cleanup_list); - forw_packet->skb = NULL; + forw_packet->skb = skb; forw_packet->queue_left = queue_left; forw_packet->if_incoming = if_incoming; forw_packet->if_outgoing = if_outgoing; @@ -756,22 +758,23 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, if (!primary_if) goto err; + newskb = skb_copy(skb, GFP_ATOMIC); + if (!newskb) { + batadv_hardif_put(primary_if); + goto err; + } + forw_packet = batadv_forw_packet_alloc(primary_if, NULL, &bat_priv->bcast_queue_left, - bat_priv); + bat_priv, newskb); batadv_hardif_put(primary_if); if (!forw_packet) - goto err; - - newskb = skb_copy(skb, GFP_ATOMIC); - if (!newskb) goto err_packet_free; /* as we have a copy now, it is safe to decrease the TTL */ bcast_packet = (struct batadv_bcast_packet *)newskb->data; bcast_packet->ttl--; - forw_packet->skb = newskb; forw_packet->own = own_packet; INIT_DELAYED_WORK(&forw_packet->delayed_work, @@ -781,11 +784,60 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, return NETDEV_TX_OK; err_packet_free: - batadv_forw_packet_free(forw_packet, true); + kfree_skb(newskb); err: return NETDEV_TX_BUSY; } +/** + * batadv_forw_packet_bcasts_left - check if a retransmission is necessary + * @forw_packet: the forwarding packet to check + * @hard_iface: the interface to check on + * + * Checks whether a given packet has any (re)transmissions left on the provided + * interface. + * + * hard_iface may be NULL: In that case the number of transmissions this skb had + * so far is compared with the maximum amount of retransmissions independent of + * any interface instead. + * + * Return: True if (re)transmissions are left, false otherwise. + */ +static bool +batadv_forw_packet_bcasts_left(struct batadv_forw_packet *forw_packet, + struct batadv_hard_iface *hard_iface) +{ + unsigned int max; + + if (hard_iface) + max = hard_iface->num_bcasts; + else + max = BATADV_NUM_BCASTS_MAX; + + return BATADV_SKB_CB(forw_packet->skb)->num_bcasts < max; +} + +/** + * batadv_forw_packet_bcasts_inc - increment retransmission counter of a packet + * @forw_packet: the packet to increase the counter for + */ +static void +batadv_forw_packet_bcasts_inc(struct batadv_forw_packet *forw_packet) +{ + BATADV_SKB_CB(forw_packet->skb)->num_bcasts++; +} + +/** + * batadv_forw_packet_is_rebroadcast - check packet for previous transmissions + * @forw_packet: the packet to check + * + * Return: True if this packet was transmitted before, false otherwise. + */ +bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet) +{ + return BATADV_SKB_CB(forw_packet->skb)->num_bcasts > 0; +} + static void batadv_send_outstanding_bcast_packet(struct work_struct *work) { struct batadv_hard_iface *hard_iface; @@ -826,7 +878,7 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work) if (hard_iface->soft_iface != soft_iface) continue; - if (forw_packet->num_packets >= hard_iface->num_bcasts) + if (!batadv_forw_packet_bcasts_left(forw_packet, hard_iface)) continue; if (forw_packet->own) { @@ -884,10 +936,10 @@ static void batadv_send_outstanding_bcast_packet(struct work_struct *work) } rcu_read_unlock(); - forw_packet->num_packets++; + batadv_forw_packet_bcasts_inc(forw_packet); /* if we still have some more bcasts to send */ - if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) { + if (batadv_forw_packet_bcasts_left(forw_packet, NULL)) { batadv_forw_packet_bcast_queue(bat_priv, forw_packet, send_time); return; diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h index f21166d10323..a16b34f473ef 100644 --- a/net/batman-adv/send.h +++ b/net/batman-adv/send.h @@ -34,11 +34,13 @@ struct batadv_forw_packet * batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming, struct batadv_hard_iface *if_outgoing, atomic_t *queue_left, - struct batadv_priv *bat_priv); + struct batadv_priv *bat_priv, + struct sk_buff *skb); bool batadv_forw_packet_steal(struct batadv_forw_packet *packet, spinlock_t *l); void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv, struct batadv_forw_packet *forw_packet, unsigned long send_time); +bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet); int batadv_send_skb_to_orig(struct sk_buff *skb, struct batadv_orig_node *orig_node, diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index d042c99af028..b25789abf7b9 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -64,28 +64,6 @@ #include "sysfs.h" #include "translation-table.h" -static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); -static void batadv_get_drvinfo(struct net_device *dev, - struct ethtool_drvinfo *info); -static u32 batadv_get_msglevel(struct net_device *dev); -static void batadv_set_msglevel(struct net_device *dev, u32 value); -static u32 batadv_get_link(struct net_device *dev); -static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data); -static void batadv_get_ethtool_stats(struct net_device *dev, - struct ethtool_stats *stats, u64 *data); -static int batadv_get_sset_count(struct net_device *dev, int stringset); - -static const struct ethtool_ops batadv_ethtool_ops = { - .get_settings = batadv_get_settings, - .get_drvinfo = batadv_get_drvinfo, - .get_msglevel = batadv_get_msglevel, - .set_msglevel = batadv_set_msglevel, - .get_link = batadv_get_link, - .get_strings = batadv_get_strings, - .get_ethtool_stats = batadv_get_ethtool_stats, - .get_sset_count = batadv_get_sset_count, -}; - int batadv_skb_head_push(struct sk_buff *skb, unsigned int len) { int result; @@ -140,7 +118,7 @@ static u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx) static struct net_device_stats *batadv_interface_stats(struct net_device * |