B.A.T.M.A.N

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[B.A.T.M.A.N.] [PATCH] batman-adv: Revert "Adding netfilter-bridge hooks"
by Sven Eckelmann 04 Sep '10

04 Sep '10

The netfilter hook seems to be misused and may not filter everything as expected. Also the ethernet bridge tables are not yet capable to understand batman-adv packet correctly. It was only added for testing purposes and can be removed again. Reported-by: Vasiliy Kulikov <segooon(a)gmail.com> Signed-off-by: Sven Eckelmann <sven.eckelmann(a)gmx.de> --- I got the information that Linus Luessing acked that change and will provide that patch for testing purposes somewhere else. I prefer to get it reverted because it also made the patch "batman-adv: register the batman-adv packet type per interface" useless. batman-adv/hard-interface.c | 72 +++++++++++++++++++------------------------ batman-adv/send.c | 8 +--- 2 files changed, 34 insertions(+), 46 deletions(-) diff --git a/batman-adv/hard-interface.c b/batman-adv/hard-interface.c index 063d34d..edbfddf 100644 --- a/batman-adv/hard-interface.c +++ b/batman-adv/hard-interface.c @@ -30,7 +30,6 @@ #include "hash.h" #include <linux/if_arp.h> -#include <linux/netfilter_bridge.h> #include "compat.h" @@ -495,29 +494,46 @@ out: return NOTIFY_DONE; } -static int batman_skb_recv_finish(struct sk_buff *skb) +/* receive a packet with the batman ethertype coming on a hard + * interface */ +int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, + struct packet_type *ptype, struct net_device *orig_dev) { + struct bat_priv *bat_priv; struct batman_packet *batman_packet; struct batman_if *batman_if; - struct bat_priv *bat_priv; int ret; - batman_if = get_batman_if_by_netdev(skb->dev); - if (!batman_if) + batman_if = container_of(ptype, struct batman_if, batman_adv_ptype); + skb = skb_share_check(skb, GFP_ATOMIC); + + /* skb was released by skb_share_check() */ + if (!skb) + goto err_out; + + /* packet should hold at least type and version */ + if (unlikely(!pskb_may_pull(skb, 2))) + goto err_free; + + /* expect a valid ethernet header here. */ + if (unlikely(skb->mac_len != sizeof(struct ethhdr) + || !skb_mac_header(skb))) goto err_free; if (!batman_if->soft_iface) goto err_free; + bat_priv = netdev_priv(batman_if->soft_iface); + + if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) + goto err_free; + /* discard frames on not active interfaces */ if (batman_if->if_status != IF_ACTIVE) goto err_free; - bat_priv = netdev_priv(batman_if->soft_iface); - if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE) - goto err_free; - batman_packet = (struct batman_packet *)skb->data; + if (batman_packet->version != COMPAT_VERSION) { bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: incompatible batman version (%i)\n", @@ -563,42 +579,18 @@ static int batman_skb_recv_finish(struct sk_buff *skb) } if (ret == NET_RX_DROP) - goto err_free; + kfree_skb(skb); - return 0; + /* return NET_RX_SUCCESS in any case as we + * most probably dropped the packet for + * routing-logical reasons. */ -err_free: - kfree_skb(skb); - return 0; -} - -/* receive a packet with the batman ethertype coming on a hard - * interface */ -int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *ptype, struct net_device *orig_dev) -{ - skb = skb_share_check(skb, GFP_ATOMIC); - - /* skb was released by skb_share_check() */ - if (!skb) - return 0; - - /* packet should hold at least type and version */ - if (unlikely(!pskb_may_pull(skb, 2))) - goto err_free; - - /* expect a valid ethernet header here. */ - if (unlikely(skb->mac_len != sizeof(struct ethhdr) || - !skb_mac_header(skb))) - goto err_free; + return NET_RX_SUCCESS; - /* if netfilter/ebtables wants to block incoming batman - * packets then give them a chance to do so here */ - return NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, dev, - NULL, batman_skb_recv_finish); err_free: kfree_skb(skb); - return 0; +err_out: + return NET_RX_DROP; } struct notifier_block hard_if_notifier = { diff --git a/batman-adv/send.c b/batman-adv/send.c index 283c6bb..92eb421 100644 --- a/batman-adv/send.c +++ b/batman-adv/send.c @@ -29,7 +29,6 @@ #include "vis.h" #include "aggregation.h" #include "gateway_common.h" -#include <linux/netfilter_bridge.h> #include "compat.h" @@ -94,12 +93,9 @@ int send_skb_packet(struct sk_buff *skb, /* dev_queue_xmit() returns a negative result on error. However on * congestion and traffic shaping, it drops and returns NET_XMIT_DROP - * (which is > 0). This will not be treated as an error. - * Also, if netfilter/ebtables wants to block outgoing batman - * packets then giving them a chance to do so here */ + * (which is > 0). This will not be treated as an error. */ - return NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev, - dev_queue_xmit); + return dev_queue_xmit(skb); send_skb_err: kfree_skb(skb); return NET_XMIT_DROP; -- 1.7.1

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Re: [B.A.T.M.A.N.] problem openwrt-trunk + ath5k + batman-adv-devel in my case
by Sven Eckelmann 01 Sep '10

01 Sep '10

Kazuki Shimada wrote: > Hi, Sven. > > >> P.S. > >> When activating network interfaces under bat0, What about forcing their > >> mtu value to 1527? > > > > Why? > > Because batman-adv says > "The MTU of interface wlan0 is too small 1500 to handle the transport of > batman-adv packets. Packets going over this interface will be fragmented > on layer2 which could impact the performance. Setting the MTU to 1527 > would solve the problem." > > I thought batman-adv need 1527 as mtu value. > OK, I've understood. You don't need it for unicast packets, but it is highly recommended due to performance penalties. Do you think that we should change that warning to make it more clear? Is there anything special which we should add/change? Thanks, Sven

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Re: [B.A.T.M.A.N.] Problem openWRT "backfire" and "kmod-batman-adv"
by Tim Glaremin 01 Sep '10

01 Sep '10

Hello, I compiled an new image with symbols included, here is what demsg returned: "root@OpenWrt:/# dmesg Linux version 2.6.32.16 (tim@atze) (gcc version 4.3.3 (GCC) ) #1 Thu Aug 12 14:49:00 CEST 2010 CPU revision is: 00029008 (Broadcom BCM3302) ssb: Core 0 found: ChipCommon (cc 0x800, rev 0x0E, vendor 0x4243) ssb: Core 1 found: Fast Ethernet (cc 0x806, rev 0x09, vendor 0x4243) ssb: Core 2 found: MIPS 3302 (cc 0x816, rev 0x06, vendor 0x4243) ssb: Core 3 found: USB 1.1 Host (cc 0x817, rev 0x02, vendor 0x4243) ssb: Core 4 found: MEMC SDRAM (cc 0x80F, rev 0x01, vendor 0x4243) ssb: Core 5 found: IEEE 802.11 (cc 0x812, rev 0x09, vendor 0x4243) ssb: Core 6 found: Roboswitch (cc 0x81C, rev 0x02, vendor 0x4243) ssb: Initializing MIPS core... ssb: set_irq: core 0x0806, irq 4 => 4 ssb: set_irq: core 0x0816, irq 5 => 2 ssb: set_irq: core 0x0812, irq 2 => 5 ssb: after irq reconfiguration ssb: core 0x0800, irq : 2(S) 3* 4 5 6 D I ssb: core 0x0806, irq : 2(S) 3 4* 5 6 D I ssb: core 0x0816, irq : 2(S)* 3 4 5 6 D I ssb: core 0x0817, irq : 2(S) 3 4 5 6* D I ssb: core 0x080f, irq : 2(S) 3 4 5 6 D I* ssb: core 0x0812, irq : 2(S) 3 4 5* 6 D I ssb: core 0x081c, irq : 2(S) 3 4 5 6 D I* ssb: Sonics Silicon Backplane found at address 0x18000000 Serial init done. Determined physical RAM map: memory: 01000000 @ 00000000 (usable) Initrd not found or empty - disabling initrd Zone PFN ranges: Normal 0x00000000 -> 0x00001000 Movable zone start PFN for each node early_node_map[1] active PFN ranges 0: 0x00000000 -> 0x00001000 On node 0 totalpages: 4096 free_area_init_node: node 0, pgdat 802a5b50, node_mem_map 802eb000 Normal zone: 32 pages used for memmap Normal zone: 0 pages reserved Normal zone: 4064 pages, LIFO batch:0 Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4064 Kernel command line: root=/dev/mtdblock2 rootfstype=squashfs,jffs2 noinitrd console=ttyS0,115200 PID hash table entries: 64 (order: -4, 256 bytes) Dentry cache hash table entries: 2048 (order: 1, 8192 bytes) Inode-cache hash table entries: 1024 (order: 0, 4096 bytes) Primary instruction cache 16kB, VIPT, 2-way, linesize 16 bytes. Primary data cache 8kB, 2-way, VIPT, no aliases, linesize 16 bytes Memory: 13236k/16384k available (2231k kernel code, 3148k reserved, 476k data, 136k init, 0k highmem) Hierarchical RCU implementation. NR_IRQS:128 console [ttyS0] enabled Calibrating delay loop... 199.16 BogoMIPS (lpj=398336) Mount-cache hash table entries: 512 NET: Registered protocol family 16 bio: create slab <bio-0> at 0 Switching to clocksource MIPS NET: Registered protocol family 2 IP route cache hash table entries: 1024 (order: 0, 4096 bytes) TCP established hash table entries: 512 (order: 0, 4096 bytes) TCP bind hash table entries: 512 (order: -1, 2048 bytes) TCP: Hash tables configured (established 512 bind 512) TCP reno registered NET: Registered protocol family 1 squashfs: version 4.0 (2009/01/31) Phillip Lougher Registering mini_fo version $Id$ JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc. msgmni has been set to 25 io scheduler noop registered io scheduler deadline registered (default) Serial: 8250/16550 driver, 2 ports, IRQ sharing enabled serial8250: ttyS0 at MMIO 0xb8000300 (irq = 3) is a 16550A serial8250: ttyS1 at MMIO 0xb8000400 (irq = 3) is a 16550A serial8250.0: ttyS0 at MMIO 0xb8000300 (irq = 3) is a 16550A serial8250.0: ttyS1 at MMIO 0xb8000400 (irq = 3) is a 16550A flash init: 0x1c000000 0x02000000 Physically mapped flash: Found 1 x16 devices at 0x0 in 16-bit bank Physically mapped flash: Found an alias at 0x400000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x800000 for the chip at 0x0 Physically mapped flash: Found an alias at 0xc00000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1000000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1400000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1800000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1c00000 for the chip at 0x0 Amd/Fujitsu Extended Query Table at 0x0040 number of CFI chips: 1 cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness. Flash device: 0x400000 at 0x1fc00000 bootloader size: 262144 Updating TRX offsets and length: old trx = [0x0000001c, 0x00000974, 0x000e2c00], len=0x00281000 crc32=0x00d3dbd9 new trx = [0x0000001c, 0x00000974, 0x000e2c00], len=0x000e2c00 crc32=0xbdc7b0c6 Done Creating 4 MTD partitions on "Physically mapped flash": 0x000000000000-0x000000040000 : "cfe" 0x000000040000-0x0000003f0000 : "linux" 0x000000122c00-0x0000003f0000 : "rootfs" mtd: partition "rootfs" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only mtd: partition "rootfs" set to be root filesystem mtd: partition "rootfs_data" created automatically, ofs=2A0000, len=150000 0x0000002a0000-0x0000003f0000 : "rootfs_data" 0x0000003f0000-0x000000400000 : "nvram" b44.c:v2.0 eth0: Broadcom 44xx/47xx 10/100BaseT Ethernet 00:25:9c:3c:46:04 BCM47xx Watchdog Timer enabled (30 seconds, nowayout) TCP westwood registered NET: Registered protocol family 17 802.1Q VLAN Support v1.8 Ben Greear <greearb(a)candelatech.com> All bugs added by David S. Miller <davem(a)redhat.com> VFS: Mounted root (squashfs filesystem) readonly on device 31:2. Freeing unused kernel memory: 136k freed Please be patient, while OpenWrt loads ... diag: Detected 'Linksys WRT54G/GS/GL' b44: eth0: Link is up at 100 Mbps, full duplex. b44: eth0: Flow control is off for TX and off for RX. roboswitch: Probing device eth0: found a 5325! It's a 5350. mini_fo: using base directory: / mini_fo: using storage directory: /tmp/root b44: eth0: powering down PHY b44: eth0: Link is up at 100 Mbps, full duplex. b44: eth0: Flow control is off for TX and off for RX. device eth0.0 entered promiscuous mode device eth0 entered promiscuous mode br-lan: port 1(eth0.0) entering forwarding state Compat-wireless backport release: compat-wireless-2010-07-13-4-g04898a5 Backport based on wireless-2.6.git v2.6.35-rc6-48432-gdce358e cfg80211: Calling CRDA to update world regulatory domain cfg80211: World regulatory domain updated: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) b43-phy0: Broadcom 5352 WLAN found (core revision 9) phy0: Selected rate control algorithm 'minstrel' Registered led device: b43-phy0::tx Registered led device: b43-phy0::rx Registered led device: b43-phy0::radio Broadcom 43xx driver loaded [ Features: PL, Firmware-ID: FW13 ] Broadcom 43xx-legacy driver loaded [ Features: PLID, Firmware-ID: FW10 ] PPP generic driver version 2.4.2 ip_tables: (C) 2000-2006 Netfilter Core Team NET: Registered protocol family 24 nf_conntrack version 0.5.0 (208 buckets, 832 max) batman-adv:B.A.T.M.A.N. advanced 2010.0.0 (compatibility version 8) loaded batman-adv:Adding interface: wlan0 batman-adv:Not using interface wlan0 (retrying later): interface not active jffs2_scan_eraseblock(): End of filesystem marker found at 0x0 jffs2_build_filesystem(): unlocking the mtd device... done. jffs2_build_filesystem(): erasing all blocks after the end marker... done. mini_fo: using base directory: / mini_fo: using storage directory: /overlay br-lan: port 1(eth0.0) entering disabled state device eth0 left promiscuous mode device eth0.0 left promiscuous mode br-lan: port 1(eth0.0) entering disabled state device eth0.0 entered promiscuous mode device eth0 entered promiscuous mode br-lan: port 1(eth0.0) entering forwarding state batman-adv:Removing interface: wlan0 b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10) CPU 0 Unable to handle kernel paging request at virtual address 00003aa1, epc == 805882f4, ra == 805882dc Oops[#1]: Cpu 0 $ 0 : 00000000 10009800 3c9c2500 80dca000 $ 4 : 80362b88 00003a9e 00003a98 00000000 $ 8 : 00000004 00000001 8029fd20 00000001 $12 : 0000000f 8023a728 ffffffff 80da5bc8 $16 : 80e9de80 80dca000 8058c334 80547ec0 $20 : 00000008 7ff5e300 7ff5e250 00000001 $24 : 0000003c 8f1bbcdc $28 : 80da4000 80da5d58 00475028 805882dc Hi : 00000000 Lo : 00000000 epc : 805882f4 update_min_mtu+0x2d8/0x4d8 [batman_adv] Not tainted ra : 805882dc update_min_mtu+0x2c0/0x4d8 [batman_adv] Status: 10009803 KERNEL EXL IE Cause : 0080000c BadVA : 00003aa1 PrId : 00029008 (Broadcom BCM3302) Modules linked in: batman_adv nf_nat_tftp nf_conntrack_tftp nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp ipt_MASQUERADE iptable_nat nf_nat xt_NOTRACK iptable_raw xt_state nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack pppoe pppox ipt_REJECT xt_TCPMSS ipt_LOG xt_comment xt_multiport xt_mac xt_limit iptable_mangle iptable_filter ip_tables xt_tcpudp x_tables ppp_async ppp_generic slhc b43legacy b43 mac80211 crc_ccitt cfg80211 compat_firmware_class compat arc4 aes_generic deflate ecb cbc switch_robo switch_core diag Process hostapd (pid: 1372, threadinfo=80da4000, task=80763650, tls=00000000) Stack : 80e9de80 80dca000 8058c334 80547ec0 80e9de80 80588a5c 8037d2a8 fffffff2 00000000 80dca000 00000000 fffffff0 00000000 80dca000 00000008 8004343c 00000000 80dca000 00000000 801a545c 00000000 80dca000 7ff5e270 00000000 80da5e18 800435d8 00000000 7ff5e270 00008914 00000000 00000000 ffffffed 80dca000 801a93c4 802e6c90 801aa3ec 00000000 0000001d 00008924 00008924 ... Call Trace: [<805882f4>] update_min_mtu+0x2d8/0x4d8 [batman_adv] [<805882dc>] update_min_mtu+0x2c0/0x4d8 [batman_adv] Code: 24c50006 88820003 98820000 <a8a20003> b8a20000 90830004 a0a30004 90820005 a0a20005 Disabling lock debugging due to kernel taint" An the return of logread: "root@OpenWrt:/# logread Jan 1 00:00:16 OpenWrt user.debug kernel: Normal zone: 32 pages used for memmap Jan 1 00:00:16 OpenWrt user.debug kernel: Normal zone: 0 pages reserved Jan 1 00:00:16 OpenWrt user.debug kernel: Normal zone: 4064 pages, LIFO batch:0 Jan 1 00:00:16 OpenWrt user.warn kernel: Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4064 Jan 1 00:00:16 OpenWrt user.notice kernel: Kernel command line: root=/dev/mtdblock2 rootfstype=squashfs,jffs2 noinitrd console=ttyS0,115200 Jan 1 00:00:16 OpenWrt user.info kernel: PID hash table entries: 64 (order: -4, 256 bytes) Jan 1 00:00:16 OpenWrt user.info kernel: Dentry cache hash table entries: 2048 (order: 1, 8192 bytes) Jan 1 00:00:16 OpenWrt user.info kernel: Inode-cache hash table entries: 1024 (order: 0, 4096 bytes) Jan 1 00:00:16 OpenWrt user.warn kernel: Primary instruction cache 16kB, VIPT, 2-way, linesize 16 bytes. Jan 1 00:00:16 OpenWrt user.warn kernel: Primary data cache 8kB, 2-way, VIPT, no aliases, linesize 16 bytes Jan 1 00:00:17 OpenWrt user.info kernel: Memory: 13236k/16384k available (2231k kernel code, 3148k reserved, 476k data, 136k init, 0k highmem) Jan 1 00:00:17 OpenWrt user.info kernel: Hierarchical RCU implementation. Jan 1 00:00:17 OpenWrt user.info kernel: NR_IRQS:128 Jan 1 00:00:17 OpenWrt user.info kernel: console [ttyS0] enabled Jan 1 00:00:17 OpenWrt user.info kernel: Calibrating delay loop... 199.16 BogoMIPS (lpj=398336) Jan 1 00:00:17 OpenWrt user.warn kernel: Mount-cache hash table entries: 512 Jan 1 00:00:17 OpenWrt user.info kernel: NET: Registered protocol family 16 Jan 1 00:00:17 OpenWrt user.warn kernel: bio: create slab <bio-0> at 0 Jan 1 00:00:17 OpenWrt user.info kernel: Switching to clocksource MIPS Jan 1 00:00:17 OpenWrt user.info kernel: NET: Registered protocol family 2 Jan 1 00:00:17 OpenWrt user.info kernel: IP route cache hash table entries: 1024 (order: 0, 4096 bytes) Jan 1 00:00:17 OpenWrt user.info kernel: TCP established hash table entries: 512 (order: 0, 4096 bytes) Jan 1 00:00:17 OpenWrt user.info kernel: TCP bind hash table entries: 512 (order: -1, 2048 bytes) Jan 1 00:00:17 OpenWrt user.info kernel: TCP: Hash tables configured (established 512 bind 512) Jan 1 00:00:17 OpenWrt user.info kernel: TCP reno registered Jan 1 00:00:17 OpenWrt user.info kernel: NET: Registered protocol family 1 Jan 1 00:00:17 OpenWrt user.info kernel: squashfs: version 4.0 (2009/01/31) Phillip Lougher Jan 1 00:00:17 OpenWrt user.warn kernel: Registering mini_fo version $Id$ Jan 1 00:00:17 OpenWrt user.info kernel: JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc. Jan 1 00:00:17 OpenWrt user.info kernel: msgmni has been set to 25 Jan 1 00:00:17 OpenWrt user.info kernel: io scheduler noop registered Jan 1 00:00:17 OpenWrt user.info kernel: io scheduler deadline registered (default) Jan 1 00:00:17 OpenWrt user.info kernel: Serial: 8250/16550 driver, 2 ports, IRQ sharing enabled Jan 1 00:00:17 OpenWrt user.info kernel: serial8250: ttyS0 at MMIO 0xb8000300 (irq = 3) is a 16550A Jan 1 00:00:17 OpenWrt user.info kernel: serial8250: ttyS1 at MMIO 0xb8000400 (irq = 3) is a 16550A Jan 1 00:00:17 OpenWrt user.info kernel: serial8250.0: ttyS0 at MMIO 0xb8000300 (irq = 3) is a 16550A Jan 1 00:00:17 OpenWrt user.info kernel: serial8250.0: ttyS1 at MMIO 0xb8000400 (irq = 3) is a 16550A Jan 1 00:00:17 OpenWrt user.warn kernel: flash init: 0x1c000000 0x02000000 Jan 1 00:00:17 OpenWrt user.info kernel: Physically mapped flash: Found 1 x16 devices at 0x0 in 16-bit bank Jan 1 00:00:17 OpenWrt user.debug kernel: Physically mapped flash: Found an alias at 0x400000 for the chip at 0x0 Jan 1 00:00:17 OpenWrt user.debug kernel: Physically mapped flash: Found an alias at 0x800000 for the chip at 0x0 Jan 1 00:00:17 OpenWrt user.debug kernel: Physically mapped flash: Found an alias at 0xc00000 for the chip at 0x0 Jan 1 00:00:17 OpenWrt user.debug kernel: Physically mapped flash: Found an alias at 0x1000000 for the chip at 0x0 Jan 1 00:00:17 OpenWrt user.debug kernel: Physically mapped flash: Found an alias at 0x1400000 for the chip at 0x0 Jan 1 00:00:17 OpenWrt user.debug kernel: Physically mapped flash: Found an alias at 0x1800000 for the chip at 0x0 Jan 1 00:00:17 OpenWrt user.debug kernel: Physically mapped flash: Found an alias at 0x1c00000 for the chip at 0x0 Jan 1 00:00:17 OpenWrt user.warn kernel: Amd/Fujitsu Extended Query Table at 0x0040 Jan 1 00:00:17 OpenWrt user.notice kernel: number of CFI chips: 1 Jan 1 00:00:17 OpenWrt user.notice kernel: cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness. Jan 1 00:00:17 OpenWrt user.notice kernel: Flash device: 0x400000 at 0x1fc00000 Jan 1 00:00:17 OpenWrt user.notice kernel: bootloader size: 262144 Jan 1 00:00:17 OpenWrt user.warn kernel: Updating TRX offsets and length: Jan 1 00:00:17 OpenWrt user.warn kernel: old trx = [0x0000001c, 0x00000974, 0x000e2c00], len=0x00281000 crc32=0x00d3dbd9 Jan 1 00:00:17 OpenWrt user.warn kernel: new trx = [0x0000001c, 0x00000974, 0x000e2c00], len=0x000e2c00 crc32=0xbdc7b0c6 Jan 1 00:00:17 OpenWrt user.warn kernel: Done Jan 1 00:00:17 OpenWrt user.notice kernel: Creating 4 MTD partitions on "Physically mapped flash": Jan 1 00:00:17 OpenWrt user.notice kernel: 0x000000000000-0x000000040000 : "cfe" Jan 1 00:00:17 OpenWrt user.notice kernel: 0x000000040000-0x0000003f0000 : "linux" Jan 1 00:00:17 OpenWrt user.notice kernel: 0x000000122c00-0x0000003f0000 : "rootfs" Jan 1 00:00:17 OpenWrt user.warn kernel: mtd: partition "rootfs" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only Jan 1 00:00:17 OpenWrt user.notice kernel: mtd: partition "rootfs" set to be root filesystem Jan 1 00:00:17 OpenWrt user.info kernel: mtd: partition "rootfs_data" created automatically, ofs=2A0000, len=150000 Jan 1 00:00:17 OpenWrt user.notice kernel: 0x0000002a0000-0x0000003f0000 : "rootfs_data" Jan 1 00:00:17 OpenWrt user.notice kernel: 0x0000003f0000-0x000000400000 : "nvram" Jan 1 00:00:17 OpenWrt user.info kernel: b44.c:v2.0 Jan 1 00:00:17 OpenWrt user.info kernel: eth0: Broadcom 44xx/47xx 10/100BaseT Ethernet 00:25:9c:3c:46:04 Jan 1 00:00:17 OpenWrt user.info kernel: BCM47xx Watchdog Timer enabled (30 seconds, nowayout) Jan 1 00:00:17 OpenWrt user.info kernel: TCP westwood registered Jan 1 00:00:17 OpenWrt user.info kernel: NET: Registered protocol family 17 Jan 1 00:00:17 OpenWrt user.info kernel: 802.1Q VLAN Support v1.8 Ben Greear <greearb(a)candelatech.com> Jan 1 00:00:17 OpenWrt user.info kernel: All bugs added by David S. Miller <davem(a)redhat.com> Jan 1 00:00:17 OpenWrt user.warn kernel: VFS: Mounted root (squashfs filesystem) readonly on device 31:2. Jan 1 00:00:17 OpenWrt user.info kernel: Freeing unused kernel memory: 136k freed Jan 1 00:00:17 OpenWrt user.warn kernel: Please be patient, while OpenWrt loads ... Jan 1 00:00:17 OpenWrt user.warn kernel: diag: Detected 'Linksys WRT54G/GS/GL' Jan 1 00:00:17 OpenWrt user.info kernel: b44: eth0: Link is up at 100 Mbps, full duplex. Jan 1 00:00:17 OpenWrt user.info kernel: b44: eth0: Flow control is off for TX and off for RX. Jan 1 00:00:17 OpenWrt user.info kernel: roboswitch: Probing device eth0: found a 5325! It's a 5350. Jan 1 00:00:17 OpenWrt user.info kernel: mini_fo: using base directory: / Jan 1 00:00:17 OpenWrt user.info kernel: mini_fo: using storage directory: /tmp/root Jan 1 00:00:17 OpenWrt user.info kernel: b44: eth0: powering down PHY Jan 1 00:00:19 OpenWrt user.info kernel: b44: eth0: Link is up at 100 Mbps, full duplex. Jan 1 00:00:19 OpenWrt user.info kernel: b44: eth0: Flow control is off for TX and off for RX. Jan 1 00:00:21 OpenWrt user.info kernel: device eth0.0 entered promiscuous mode Jan 1 00:00:21 OpenWrt user.info kernel: device eth0 entered promiscuous mode Jan 1 00:00:21 OpenWrt user.info kernel: br-lan: port 1(eth0.0) entering forwarding state Jan 1 00:00:21 OpenWrt user.info kernel: Compat-wireless backport release: compat-wireless-2010-07-13-4-g04898a5 Jan 1 00:00:21 OpenWrt user.info kernel: Backport based on wireless-2.6.git v2.6.35-rc6-48432-gdce358e Jan 1 00:00:22 OpenWrt user.info kernel: cfg80211: Calling CRDA to update world regulatory domain Jan 1 00:00:28 OpenWrt user.info kernel: cfg80211: World regulatory domain updated: Jan 1 00:00:28 OpenWrt user.info kernel: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) Jan 1 00:00:28 OpenWrt user.info kernel: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Jan 1 00:00:28 OpenWrt user.info kernel: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) Jan 1 00:00:28 OpenWrt user.info kernel: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) Jan 1 00:00:28 OpenWrt user.info kernel: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Jan 1 00:00:28 OpenWrt user.info kernel: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Jan 1 00:00:28 OpenWrt user.info kernel: b43-phy0: Broadcom 5352 WLAN found (core revision 9) Jan 1 00:00:28 OpenWrt user.debug kernel: phy0: Selected rate control algorithm 'minstrel' Jan 1 00:00:28 OpenWrt user.info kernel: Registered led device: b43-phy0::tx Jan 1 00:00:28 OpenWrt user.info kernel: Registered led device: b43-phy0::rx Jan 1 00:00:28 OpenWrt user.info kernel: Registered led device: b43-phy0::radio Jan 1 00:00:28 OpenWrt user.info kernel: Broadcom 43xx driver loaded [ Features: PL, Firmware-ID: FW13 ] Jan 1 00:00:29 OpenWrt user.info kernel: Broadcom 43xx-legacy driver loaded [ Features: PLID, Firmware-ID: FW10 ] Jan 1 00:00:29 OpenWrt user.info kernel: PPP generic driver version 2.4.2 Jan 1 00:00:30 OpenWrt user.info kernel: ip_tables: (C) 2000-2006 Netfilter Core Team Jan 1 00:00:30 OpenWrt user.info kernel: NET: Registered protocol family 24 Jan 1 00:00:31 OpenWrt user.warn kernel: nf_conntrack version 0.5.0 (208 buckets, 832 max) Jan 1 00:00:32 OpenWrt user.info kernel: batman-adv:B.A.T.M.A.N. advanced 2010.0.0 (compatibility version 8) loaded Jan 1 00:00:35 OpenWrt user.info sysinit: Loading defaults Jan 1 00:00:36 OpenWrt user.info sysinit: Loading synflood protection Jan 1 00:00:36 OpenWrt user.info sysinit: Adding custom chains Jan 1 00:00:37 OpenWrt user.info sysinit: Loading zones Jan 1 00:00:38 OpenWrt user.info sysinit: Loading forwarding Jan 1 00:00:38 OpenWrt user.info sysinit: Loading redirects Jan 1 00:00:38 OpenWrt user.info sysinit: Loading rules Jan 1 00:00:38 OpenWrt user.info sysinit: Loading includes Jan 1 00:00:38 OpenWrt user.info sysinit: Loading zone defaults Jan 1 00:00:39 OpenWrt user.notice root: adding lan (br-lan) to firewall zone lan Jan 1 00:00:41 OpenWrt user.notice dnsmasq: DNS rebinding protection is active, will discard upstream RFC1918 responses! Jan 1 00:00:46 OpenWrt daemon.info dnsmasq[806]: started, version 2.55 cachesize 150 Jan 1 00:00:46 OpenWrt daemon.info dnsmasq[806]: compile time options: IPv6 GNU-getopt no-DBus no-I18N DHCP TFTP Jan 1 00:00:46 OpenWrt daemon.info dnsmasq[806]: using local addresses only for domain lan Jan 1 00:00:46 OpenWrt daemon.warn dnsmasq[806]: no servers found in /tmp/resolv.conf.auto, will retry Jan 1 00:00:46 OpenWrt daemon.info dnsmasq[806]: read /etc/hosts - 1 addresses Jan 1 00:00:46 OpenWrt user.info kernel: batman-adv:Adding interface: wlan0 Jan 1 00:00:46 OpenWrt user.err kernel: batman-adv:Not using interface wlan0 (retrying later): interface not active Jan 1 00:00:47 OpenWrt user.warn kernel: jffs2_scan_eraseblock(): End of filesystem marker found at 0x0 Jan 1 00:00:47 OpenWrt user.warn kernel: jffs2_build_filesystem(): unlocking the mtd device... done. Jan 1 00:01:00 OpenWrt user.warn kernel: jffs2_build_filesystem(): erasing all blocks after the end marker... done. Jan 1 00:01:00 OpenWrt user.info sysinit: copying files ... done Jan 1 00:01:01 OpenWrt user.info kernel: mini_fo: using base directory: / Jan 1 00:01:01 OpenWrt user.info kernel: mini_fo: using storage directory: /overlay Jan 1 00:01:07 OpenWrt authpriv.info dropbear[877]: Running in background Jan 1 00:06:33 OpenWrt daemon.warn dnsmasq[806]: failed to access /tmp/resolv.conf.auto: No such file or directory Jan 1 00:06:34 OpenWrt user.info kernel: br-lan: port 1(eth0.0) entering disabled state Jan 1 00:06:34 OpenWrt user.info kernel: device eth0 left promiscuous mode Jan 1 00:06:34 OpenWrt user.info kernel: device eth0.0 left promiscuous mode Jan 1 00:06:34 OpenWrt user.info kernel: br-lan: port 1(eth0.0) entering disabled state Jan 1 00:06:40 OpenWrt user.info kernel: device eth0.0 entered promiscuous mode Jan 1 00:06:40 OpenWrt user.info kernel: device eth0 entered promiscuous mode Jan 1 00:06:40 OpenWrt user.info kernel: br-lan: port 1(eth0.0) entering forwarding state Jan 1 00:06:44 OpenWrt user.info kernel: batman-adv:Removing interface: wlan0 Jan 1 00:06:48 OpenWrt user.info kernel: b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10) Jan 1 00:06:48 OpenWrt user.alert kernel: CPU 0 Unable to handle kernel paging request at virtual address 00003aa1, epc == 805882f4, ra == 805882dc Jan 1 00:06:48 OpenWrt user.warn kernel: Oops[#1]: Jan 1 00:06:48 OpenWrt user.warn kernel: Cpu 0 Jan 1 00:06:48 OpenWrt user.warn kernel: $ 0 : 00000000 10009800 3c9c2500 80dca000 Jan 1 00:06:48 OpenWrt user.warn kernel: $ 4 : 80362b88 00003a9e 00003a98 00000000 Jan 1 00:06:48 OpenWrt user.warn kernel: $ 8 : 00000004 00000001 8029fd20 00000001 Jan 1 00:06:48 OpenWrt user.warn kernel: $12 : 0000000f 8023a728 ffffffff 80da5bc8 Jan 1 00:06:48 OpenWrt user.warn kernel: $16 : 80e9de80 80dca000 8058c334 80547ec0 Jan 1 00:06:48 OpenWrt user.warn kernel: $20 : 00000008 7ff5e300 7ff5e250 00000001 Jan 1 00:06:48 OpenWrt user.warn kernel: $24 : 0000003c 8f1bbcdc Jan 1 00:06:48 OpenWrt user.warn kernel: $28 : 80da4000 80da5d58 00475028 805882dc Jan 1 00:06:48 OpenWrt user.warn kernel: Hi : 00000000 Jan 1 00:06:48 OpenWrt user.warn kernel: Lo : 00000000 Jan 1 00:06:48 OpenWrt user.warn kernel: epc : 805882f4 update_min_mtu+0x2d8/0x4d8 [batman_adv] Jan 1 00:06:48 OpenWrt user.warn kernel: Not tainted Jan 1 00:06:48 OpenWrt user.warn kernel: ra : 805882dc update_min_mtu+0x2c0/0x4d8 [batman_adv] Jan 1 00:06:48 OpenWrt user.warn kernel: Status: 10009803 KERNEL EXL IE Jan 1 00:06:48 OpenWrt user.warn kernel: Cause : 0080000c Jan 1 00:06:48 OpenWrt user.warn kernel: BadVA : 00003aa1 Jan 1 00:06:48 OpenWrt user.warn kernel: PrId : 00029008 (Broadcom BCM3302) Jan 1 00:06:48 OpenWrt user.warn kernel: Modules linked in: batman_adv nf_nat_tftp nf_conntrack_tftp nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp ipt_MASQUERADE iptable_nat nf_nat xt_NOTRACK iptable_raw xt_state nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack Jan 1 00:06:48 OpenWrt user.warn kernel: Process hostapd (pid: 1372, threadinfo=80da4000, task=80763650, tls=00000000) Jan 1 00:06:48 OpenWrt user.warn kernel: Stack : 80e9de80 80dca000 8058c334 80547ec0 80e9de80 80588a5c 8037d2a8 fffffff2 Jan 1 00:06:48 OpenWrt user.warn kernel: 00000000 80dca000 00000000 fffffff0 00000000 80dca000 00000008 8004343c Jan 1 00:06:48 OpenWrt user.warn kernel: 00000000 80dca000 00000000 801a545c 00000000 80dca000 7ff5e270 00000000 Jan 1 00:06:48 OpenWrt user.warn kernel: 80da5e18 800435d8 00000000 7ff5e270 00008914 00000000 00000000 ffffffed Jan 1 00:06:48 OpenWrt user.warn kernel: 80dca000 801a93c4 802e6c90 801aa3ec 00000000 0000001d 00008924 00008924 Jan 1 00:06:48 OpenWrt user.warn kernel: ... Jan 1 00:06:48 OpenWrt user.warn kernel: Call Trace: Jan 1 00:06:48 OpenWrt user.warn kernel: [<805882f4>] update_min_mtu+0x2d8/0x4d8 [batman_adv] Jan 1 00:06:48 OpenWrt user.warn kernel: [<805882dc>] update_min_mtu+0x2c0/0x4d8 [batman_adv] Jan 1 00:06:48 OpenWrt user.warn kernel: Code: 24c50006 88820003 98820000 <a8a20003> b8a20000 90830004 a0a30004 90820005 a0a20005 Jan 1 00:06:48 OpenWrt user.warn kernel: Disabling lock debugging due to kernel taint" Hope it helps.... The part Marek quoted at least did change :) With best regards, Tim

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[B.A.T.M.A.N.] The state of batman-adv branches in august 2010
by Sven Eckelmann 29 Aug '10

29 Aug '10

Hi, as we started to have different branches and repositories, everything became a little bit more complex to track. I will try to summarize what and where is something going on inside the batman-adv universe. There is currently one main change happening in the branch design. The branch currently called 'maint' will be renamed to 'next'. This should reflect that we work there on the features (already part of master/trunk) which should be submitted to the kernel maintainers. This branch is stopped quite early in the development phase - even before the kernel with the corresponding features will be released. For example the current patches for linux 2.6.36 (which will may be released in 5 weeks) will be finished with the release of v2010.1.0. The next branch will get immediately all patches which will be part of linux 2.6.37. This is needed because all patches must be tested in linux-next a long time before Linus Torvalds opens the merge window vor linux 2.6.37. Of course, this will create a small gap for bug fixes which will enter linux 2.6.36 after the release of v2010.1.0. That's why we now use the maint branch to track those changes. Maint will always be a branch on top of the last release with all bugfixes which must be added to that release and are not features for the next branch. That new maint branch will also help other distributors to easily find patches which should be applied on top of their shipped versions or for users which want to build their version of batman-adv manually and still get a version which fixes (hopefully) all know bugs. And maybe we will have bug fix releases in the future... * trunk/batman-adv/ [1], master [2] In trunk is always summer - so changes always(?) enter here and will get moved to other branches unless they need some more time to get a fine flavor - or at least more testing. Even if everything should hit trunk, it is easier to describe changes in a different places (next, master-rebase). This branch can be used together with trunk/batctl/ [3] * next [4] This is were commits are gathered to be send later to the linux kernel folks. Only tested features or features which are dependencies for the in-kernel batman-adv should enter this branch. Since the last time [5] many things happened, but not all are finished yet. So for example the release of v2010.1.0 is still pending and so no patches for linux-2.6.37 have been send to GregKH. Meanwhile we had to deal a little bit with some regressions which were added when we changed to everything from procfs to sysfs. This is the reason why there were some patches sent to the linux stable-tree folks lately. After that release we we will merge some patches which are mostly needed to push the merge of batman-adv into linux-net a little bit further. That includes for example the preparation of nearly all data inside of skbs instead of external buffers and the usage of optimized kernel functionality for things which we tried to implement our self. But of course there are again quite interesting features: * batman-adv: layer2 unicast packet fragmentation * batman-adv: attach each hard-interface to a soft-interface * batman-adv: multiple mesh clouds Also patches were added which tweaked a little bit here and there. Many of them came directly from the kernel folks and dealt with smaller coding style problems. This branch can be used together with batctl-next [6] * linux-2.6.36 The release of linux 2.6.36 isn't finished yet, but we have submitted all patches in next. We aren't yet in net/, but hope that this follows soon. All problems which David S. Miller [7] found were relative small and already fixed. We will wait until the first patches for the upcoming merge window were send to the staging tree, before we try to get really into net/. You may experienced some weird regressions when using early -RCs of linux 2.6.36. Those happened due to some smaller patch war between the guys from linux-net and us. Those changes clashed when GregKH had to merge them after the release of 2.6.35. Unfortunately he resolved the merge conflicts a little bit different than I expected. But those problems should be solved with the upcoming release of linux 2.6.36-rc3. * linux [8] The dirty place were all the linux integration happens. It is ugly, misunderstood and uninteresting for most people. The last synchronization point was GregKH-20100821 [9]. It is a merge of linux-2.6.36-rc1 and v2010.0.0-46-ge3a0cc9 [10] + a documentation of all files we create in sysfs. So this synchronization point (a git tag) just says that we checked at least linux-2.6.36-rc1 for new patches not yet integrated in next/trunk of batman-adv and that we send our changes until that point to GregKH [11]. * rebase [12] My personal playground. (With a little delay) I will try to get all changes in trunk rebased on top of next. As result we get only the essence of changes in trunk which aren't already part of next. This also means for example that patches will look like they were made with sysfs in mind when they are originally created files in /proc. Even when I always ensure that the files in master and rebase are 100% equal, the original author may not be blamed when a single patch will try to eat your pet (or you could say that patches in that branch will not be checked by their original authors and I will only guarantee that when you apply all patches you will get the same files as in trunk). Nevertheless it is a great place to get and test feature patches on top of next without using the complete set of changes in master. Or to understand what goes on in trunk compared to next. After the release of v2010.1.0 we will only have the gateway patches again waiting to get merged into next. * batman-adv: adapting source version to revised versioning scheme [13] * batman-adv: adding gateway functionality [14] * batman-adv: send DHCP requests directly to the chosen gw [15] * batman-adv: best gw DHCP filter 802.1Q support [16] This branch will jump around and it is not save to track it using a local git branch. It can be used together with trunk/batctl/ [3] Maybe this is a good place to announce that there is something like master-rebase also to rebase current patches of batctl [17] on top of the latest release. It is unknown who will continue the work on that, but as it is not as complex at the kernel module, I doubt that it is really much work rebase and reorder those patches. Last but not least, thanks to everyone who has done the real work * Andreas Langer * Joe Perches * Linus Lüssing * Marek Lindner * Randy Dunlap * Simon Wunderlich Special thanks goes to * Kazuki Shimada * Tim Glaremin for extensive testing and debugging help. Lets see what the next months will bring us. Best regards, Sven [1] http://downloads.open-mesh.org/svn/batman/trunk/batman-adv/ [2] http://git.open-mesh.net/?p=batman-adv.git;a=shortlog;h=refs/heads/master [3] http://downloads.open-mesh.net/svn/batman/trunk/batctl/ [4] http://git.open-mesh.net/?p=batman-adv.git;a=shortlog;h=refs/heads/next [5] http://git.open-mesh.net/?p=batman-adv.git;a=shortlog;h=13bc17ebf3e6062d926… [6] http://git.open-mesh.net/?p=batctl.git;a=shortlog;h=refs/heads/next [7] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2010-July/003141.html [8] http://git.open-mesh.net/?p=ecsv/linux-merge.git;a=shortlog;h=refs/heads/li… [9] http://git.open-mesh.net/?p=ecsv/linux-merge.git;a=commit;h=GregKH-20100821 [10] http://git.open-mesh.net/?p=batman-adv;a=commit;h=e3a0cc90940915dd14e4ca6bd… [11] http://open-mesh.net/wiki/SubmittingLinux [12] http://git.open-mesh.net/?p=ecsv/master-rebase.git;a=shortlog;h=rebase [13] http://git.open-mesh.net/?p=ecsv/master-rebase.git;a=commit;h=5900c5e655797… [14] http://git.open-mesh.net/?p=ecsv/master-rebase.git;a=commit;h=efd570e04d149… [15] http://git.open-mesh.net/?p=ecsv/master-rebase.git;a=commit;h=1f498c63ae131… [16] http://git.open-mesh.net/?p=ecsv/master-rebase.git;a=commit;h=791290fc06e64… [17] http://git.open-mesh.net/?p=ecsv/batctl-rebase.git;a=shortlog;h=rebase

1 0

[B.A.T.M.A.N.] [PATCH] batman-adv: Don't call unregister_netdev with locked rtnl semaphore
by Sven Eckelmann 29 Aug '10

29 Aug '10

We currently try to call unregister_netdev when we can destroy a softif after all corresponding hard-interfaces announced that they will be removed. This will be done when we receive a hard_if_event which already takes the rtnl semaphore and thus we try to get it again in unregister_netdev. This results in a deadlock. This call to unregister_netdev cannot easily replaced by unregister_netdevice, because other parts of the batman-adv module still call that code indirectly without holding the rtnl semaphore. (needs rtln_unlocked) unregister_netdev ^ | softif_destroy ^ | hardif_disable_interface ^ ^ / | store_mesh_iface hardif_remove_interface (rtln_unlocked) ^ ^ | \ hardif_remove_interfaces hard_if_event ^ (rtln_locked) | batman_exit (rtln_unlocked) A consistent workaround is to change store_mesh_iface and hardif_remove_interfaces to call rtnl_lock before they call the mentioned child function, release the semaphore afterwards and change unregister_netdev in softif_destroy to unregister_netdevice. Reported-by: Kazuki Shimada <zukky(a)bb.banban.jp> Signed-off-by: Sven Eckelmann <sven.eckelmann(a)gmx.de> --- batman-adv/bat_sysfs.c | 7 ++++++- batman-adv/hard-interface.c | 5 ++++- batman-adv/soft-interface.c | 2 +- 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/batman-adv/bat_sysfs.c b/batman-adv/bat_sysfs.c index 1331a02..8e180ba 100644 --- a/batman-adv/bat_sysfs.c +++ b/batman-adv/bat_sysfs.c @@ -492,13 +492,18 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr, return count; if (status_tmp == IF_NOT_IN_USE) { + rtnl_lock(); hardif_disable_interface(batman_if); + rtnl_unlock(); return count; } /* if the interface already is in use */ - if (batman_if->if_status != IF_NOT_IN_USE) + if (batman_if->if_status != IF_NOT_IN_USE) { + rtnl_lock(); hardif_disable_interface(batman_if); + rtnl_unlock(); + } return hardif_enable_interface(batman_if, buff); } diff --git a/batman-adv/hard-interface.c b/batman-adv/hard-interface.c index a437ec3..b12f63b 100644 --- a/batman-adv/hard-interface.c +++ b/batman-adv/hard-interface.c @@ -441,8 +441,11 @@ void hardif_remove_interfaces(void) { struct batman_if *batman_if, *batman_if_tmp; - list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) + list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) { + rtnl_lock(); hardif_remove_interface(batman_if); + rtnl_unlock(); + } } static int hard_if_event(struct notifier_block *this, diff --git a/batman-adv/soft-interface.c b/batman-adv/soft-interface.c index a45626e..38134ae 100644 --- a/batman-adv/soft-interface.c +++ b/batman-adv/soft-interface.c @@ -351,7 +351,7 @@ void softif_destroy(struct net_device *soft_iface) debugfs_del_meshif(soft_iface); sysfs_del_meshif(soft_iface); mesh_free(soft_iface); - unregister_netdev(soft_iface); + unregister_netdevice(soft_iface); } /* ethtool */ -- 1.7.1

2 1

[B.A.T.M.A.N.] (no subject)
by Linus Lüssing 29 Aug '10

29 Aug '10

------------- Hi Linus, On Wed, Aug 18, 2010 at 00:10 +0200, Linus Lüssing wrote: > Hi Vasiliy, > > Also first of all thanks for your little reviewing of the batman code from > me too. I've been the person submitting the patch to enable ebtables > filtering of batman-adv's packets.Sorry, I'm not a kernel coding veteran, so > I might possibly have missed something ;). However, I don't fully understand > when the skb should be leaked, so hope you don't mind some more asking from > my side :). > > Okay, I had a little closer look again.NF_HOOK returns -1 in case of a drop > due to nf_hook_slow() and 1 in case of a success due to nf_hook_slow() + the > ok function returning 1 too. And hey, yes, nf_hook_slow() can also return 0, > passing it all up to the NF_HOOK which would lead to the goto err_out in > batman-adv - and both the kernel module and netfilter won't free the skb! > However, I think I'm not quite getting when nf_hook_slow() might return 0... The thing is that code using NF_HOOK should be written in functional paradigm: the recv() should be divided into 2 functions, before the NF_HOOK and after. All after-nf work should be delegated to second part, not to code in first part that is run after NF_HOOK return. It solves the problem of asyncronous processing in hooks. It is perferctly seen in ipv4 ip_rcv() & rp_rcv_finish(). > > What confuses me even more is, that of course if nf_hook_slow() could return > a value other than 1 and without freeing the skb, the batman-adv kernel > module would have to free the skb itself in send.c, too. In send.c the > return value of NF_HOOK is being returned there immediately without a check > at the moment, hoping that either netfilter or dev_queue_xmit() would free > the skb. But then net/ipv4/arp.c's arp_xmit() would have the same problem, > too, wouldn't it? It also does not check whether the > NF_HOOK(/nf_hook_slow()) there might return 0 either, meaning that the skb > has not yet been consumed/freed? So is there the same bug / possible memleak > or what is the difference between ipv4's arp.c and batman-adv's > send.c/hard_interface.c in the usage of the NF_HOOK? No, there isn't ;) In fact, for the caller of NF_HOOK() three cases may happed: 1) All hooks return NF_ACCEPT or similar (NF_STOP or through NF_QUEUE/NF_REPEAT with the same result). In this case ok_fn() is called and code after return from NF_HOOK() is run. In case of arp dev_queue_xmit() processes the skb and free it. In your case ok_fn() does nothing and code after return from NF_HOOK() finishes the processing of skb. 2) Some hook returns NF_DROP or similar (like (1), with the same effect for the caller). In this case nf_hook_slow() frees skb and NF_HOOK() returns -1. ok_fn() is not called at all. Arp and batman don't leak anything as skb is freed. 3) Some hook returns NF_STOLEN signaling that now it is responsible for skb delivery and freeing. It can be stolen until some long calculations end or even some network communication is finished (e.g. hook wants to know whether skb dest ip is google.com) a) After some time the hook frees skb and doesn't call ok_fn(). arp and you don't leak anything and work exactly like NF_HOOK() retuned NF_DROPPED. b) After some time the hook finishes calcs and passes the skb to ok_fn(). From this time ok_fn() is responsible for the skb. In arp case it is dev_queue_xmit() that frees skb. In batman case it does NOTHING and skb is leaked. Also see the comment from linux/netfilter.h: /* Activate hook; either okfn or kfree_skb called, unless a hook returns NF_STOLEN (in which case, it's up to the hook to deal with the consequences). Returns -ERRNO if packet dropped. Zero means queued, stolen or accepted. */ /* RR: > I don't want nf_hook to return anything because people might forget > about async and trust the return value to mean "packet was ok". AK: Just document it clearly, then you can expect some sense from kernel coders :) */ Thanks, Vasiliy.

2 2

[B.A.T.M.A.N.] Staging: batman-adv for 2.6.36 (7: fixes)
by Sven Eckelmann 23 Aug '10

23 Aug '10

Hi, here are patches targeted for 2.6.36. They are smaller bugfixes and add no new features. I already send you 5 Patches two weeks ago which fixes problems in 2.6.36 and one of them also in 2.6.35, but got no reply till now. So here is the reminder you asked me before. The patches for 2.6.37 will follow later. thanks, Sven Sven Eckelmann (3): Staging: batman-adv: Create batman_if only on register event Staging: batman-adv: Don't use net_dev after dev_put Staging: batman-adv: Don't write in not allocated packet_buff drivers/staging/batman-adv/hard-interface.c | 21 ++++++++++++--------- 1 files changed, 12 insertions(+), 9 deletions(-)

2 4

[B.A.T.M.A.N.] Nat Question
by David Beaumont 23 Aug '10

23 Aug '10

I have a B.A.T.M.A.N mesh successfully configured on x86 hardware. I can currently ping the internet from the router that is connected via the mesh, however i can't download or connect to any webpages. I see the request for the page going over the bat0 interface and being received at the other end. I've a feeling this is a basic nat problem, but have been unable to find a solution. I am using OpenWRT software. Any advice? or hints? Thanks

3 25

[B.A.T.M.A.N.] [PATCH] batman-adv: Don't write in not allocated packet_buff
by Sven Eckelmann 21 Aug '10

21 Aug '10

Each net_device in a system will automatically managed as a possible batman_if and holds different informations like a buffer with a prepared originator messages. To reduce the memory usage, the packet_buff will only be allocated when the interface is really added/enabled for batman-adv. The function to update the hw address information inside the packet_buff just assumes that the packet_buff is always initialised and thus the kernel will just oops when we try to change the hw address of a not already fully enabled interface. We must always check if the packet_buff is allocated before we try to change information inside of it. Reported-by: Tim Glaremin <Tim.Glaremin(a)web.de> Reported-by: Lemonde <zukky(a)bb.banban.jp> Signed-off-by: Sven Eckelmann <sven.eckelmann(a)gmx.de> Cc: stable <stable(a)kernel.org> Signed-off-by: Sven Eckelmann <sven.eckelmann(a)gmx.de> --- batman-adv/hard-interface.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/batman-adv/hard-interface.c b/batman-adv/hard-interface.c index eb26026..9d0a47c 100644 --- a/batman-adv/hard-interface.c +++ b/batman-adv/hard-interface.c @@ -138,6 +138,9 @@ static bool hardif_is_iface_up(struct batman_if *batman_if) static void update_mac_addresses(struct batman_if *batman_if) { + if (!batman_if || !batman_if->packet_buff) + return; + addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr); memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig, @@ -397,6 +400,7 @@ static struct batman_if *hardif_add_interface(struct net_device *net_dev) batman_if->net_dev = net_dev; batman_if->soft_iface = NULL; batman_if->if_status = IF_NOT_IN_USE; + batman_if->packet_buff = NULL; INIT_LIST_HEAD(&batman_if->list); check_known_mac_addr(batman_if->net_dev->dev_addr); -- 1.7.1

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Re: [B.A.T.M.A.N.] Problem openWRT "backfire" and "kmod-batman-adv"
by Tim 21 Aug '10

21 Aug '10

Hi everybody, > Ok, could you please try the attached patch? Just add it to the other patches > (you can omit 03-... after a successful test. But it may reveal interesting > information if that wasn't the actual problem). Don't forget to cleanup your > openwrt build environment. > > Best regards, > Sven > the patch seems to work. Just did some basic testing and was able to build up a network, even with the devices running older versions. I will continue testing within the next few days, but now I need to focus on creating a presentation for Wednesday. I also added the output of dmesg: root@OpenWrt:/# dmesg Linux version 2.6.32.16 (tim@atze) (gcc version 4.3.3 (GCC) ) #1 Fri Aug 20 20:56:09 CEST 2010 CPU revision is: 00029008 (Broadcom BCM3302) ssb: Core 0 found: ChipCommon (cc 0x800, rev 0x0E, vendor 0x4243) ssb: Core 1 found: Fast Ethernet (cc 0x806, rev 0x09, vendor 0x4243) ssb: Core 2 found: MIPS 3302 (cc 0x816, rev 0x06, vendor 0x4243) ssb: Core 3 found: USB 1.1 Host (cc 0x817, rev 0x02, vendor 0x4243) ssb: Core 4 found: MEMC SDRAM (cc 0x80F, rev 0x01, vendor 0x4243) ssb: Core 5 found: IEEE 802.11 (cc 0x812, rev 0x09, vendor 0x4243) ssb: Core 6 found: Roboswitch (cc 0x81C, rev 0x02, vendor 0x4243) ssb: Initializing MIPS core... ssb: set_irq: core 0x0806, irq 4 => 4 ssb: set_irq: core 0x0816, irq 5 => 2 ssb: set_irq: core 0x0812, irq 2 => 5 ssb: after irq reconfiguration ssb: core 0x0800, irq : 2(S) 3* 4 5 6 D I ssb: core 0x0806, irq : 2(S) 3 4* 5 6 D I ssb: core 0x0816, irq : 2(S)* 3 4 5 6 D I ssb: core 0x0817, irq : 2(S) 3 4 5 6* D I ssb: core 0x080f, irq : 2(S) 3 4 5 6 D I* ssb: core 0x0812, irq : 2(S) 3 4 5* 6 D I ssb: core 0x081c, irq : 2(S) 3 4 5 6 D I* ssb: Sonics Silicon Backplane found at address 0x18000000 Serial init done. Determined physical RAM map: memory: 01000000 @ 00000000 (usable) Initrd not found or empty - disabling initrd Zone PFN ranges: Normal 0x00000000 -> 0x00001000 Movable zone start PFN for each node early_node_map[1] active PFN ranges 0: 0x00000000 -> 0x00001000 On node 0 totalpages: 4096 free_area_init_node: node 0, pgdat 802a5b50, node_mem_map 802eb000 Normal zone: 32 pages used for memmap Normal zone: 0 pages reserved Normal zone: 4064 pages, LIFO batch:0 Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4064 Kernel command line: root=/dev/mtdblock2 rootfstype=squashfs,jffs2 noinitrd console=ttyS0,115200 PID hash table entries: 64 (order: -4, 256 bytes) Dentry cache hash table entries: 2048 (order: 1, 8192 bytes) Inode-cache hash table entries: 1024 (order: 0, 4096 bytes) Primary instruction cache 16kB, VIPT, 2-way, linesize 16 bytes. Primary data cache 8kB, 2-way, VIPT, no aliases, linesize 16 bytes Memory: 13236k/16384k available (2231k kernel code, 3148k reserved, 476k data, 136k init, 0k highmem) Hierarchical RCU implementation. NR_IRQS:128 console [ttyS0] enabled Calibrating delay loop... 199.16 BogoMIPS (lpj=398336) Mount-cache hash table entries: 512 NET: Registered protocol family 16 bio: create slab <bio-0> at 0 Switching to clocksource MIPS NET: Registered protocol family 2 IP route cache hash table entries: 1024 (order: 0, 4096 bytes) TCP established hash table entries: 512 (order: 0, 4096 bytes) TCP bind hash table entries: 512 (order: -1, 2048 bytes) TCP: Hash tables configured (established 512 bind 512) TCP reno registered NET: Registered protocol family 1 squashfs: version 4.0 (2009/01/31) Phillip Lougher Registering mini_fo version $Id$ JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc. msgmni has been set to 25 io scheduler noop registered io scheduler deadline registered (default) Serial: 8250/16550 driver, 2 ports, IRQ sharing enabled serial8250: ttyS0 at MMIO 0xb8000300 (irq = 3) is a 16550A serial8250: ttyS1 at MMIO 0xb8000400 (irq = 3) is a 16550A serial8250.0: ttyS0 at MMIO 0xb8000300 (irq = 3) is a 16550A serial8250.0: ttyS1 at MMIO 0xb8000400 (irq = 3) is a 16550A flash init: 0x1c000000 0x02000000 Physically mapped flash: Found 1 x16 devices at 0x0 in 16-bit bank Physically mapped flash: Found an alias at 0x400000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x800000 for the chip at 0x0 Physically mapped flash: Found an alias at 0xc00000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1000000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1400000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1800000 for the chip at 0x0 Physically mapped flash: Found an alias at 0x1c00000 for the chip at 0x0 CFI mfr 0x000000c2 CFI id 0x000022a8 Amd/Fujitsu Extended Query Table at 0x0040 Amd/Fujitsu Extended Query version 1.1. number of CFI chips: 1 cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness. Flash device: 0x400000 at 0x1fc00000 bootloader size: 262144 Creating 4 MTD partitions on "Physically mapped flash": 0x000000000000-0x000000040000 : "cfe" 0x000000040000-0x0000003f0000 : "linux" 0x000000122c00-0x0000003f0000 : "rootfs" mtd: partition "rootfs" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only mtd: partition "rootfs" set to be root filesystem mtd: partition "rootfs_data" created automatically, ofs=2A0000, len=150000 0x0000002a0000-0x0000003f0000 : "rootfs_data" 0x0000003f0000-0x000000400000 : "nvram" b44.c:v2.0 eth0: Broadcom 44xx/47xx 10/100BaseT Ethernet 00:25:9c:3c:46:04 BCM47xx Watchdog Timer enabled (30 seconds, nowayout) TCP westwood registered NET: Registered protocol family 17 802.1Q VLAN Support v1.8 Ben Greear <greearb(a)candelatech.com> All bugs added by David S. Miller <davem(a)redhat.com> VFS: Mounted root (squashfs filesystem) readonly on device 31:2. Freeing unused kernel memory: 136k freed Please be patient, while OpenWrt loads ... diag: Detected 'Linksys WRT54G/GS/GL' b44: eth0: Link is up at 100 Mbps, full duplex. b44: eth0: Flow control is off for TX and off for RX. roboswitch: Probing device eth0: found a 5325! It's a 5350. mini_fo: using base directory: / mini_fo: using storage directory: /overlay b44: eth0: powering down PHY b44: eth0: Link is up at 100 Mbps, full duplex. b44: eth0: Flow control is off for TX and off for RX. device eth0.0 entered promiscuous mode device eth0 entered promiscuous mode br-lan: port 1(eth0.0) entering forwarding state Compat-wireless backport release: compat-wireless-2010-07-13-4-g04898a5 Backport based on wireless-2.6.git v2.6.35-rc6-48432-gdce358e cfg80211: Calling CRDA to update world regulatory domain b43-phy0: Broadcom 5352 WLAN found (core revision 9) cfg80211: World regulatory domain updated: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) phy0: Selected rate control algorithm 'minstrel' Registered led device: b43-phy0::tx Registered led device: b43-phy0::rx Registered led device: b43-phy0::radio Broadcom 43xx driver loaded [ Features: PL, Firmware-ID: FW13 ] Broadcom 43xx-legacy driver loaded [ Features: PLID, Firmware-ID: FW10 ] PPP generic driver version 2.4.2 ip_tables: (C) 2000-2006 Netfilter Core Team NET: Registered protocol family 24 nf_conntrack version 0.5.0 (208 buckets, 832 max) batman-adv-dbg: go through if_list batman-adv-dbg: final min_mtu is 1500 batman-adv-dbg: got event 5 for net_dev 80845c00 batman-adv-dbg: will add net_device 80845c00 to if_list batman-adv-dbg: got batman_if (null) for net_dev 80845c00 batman-adv-dbg: got event 1 for net_dev 80845c00 batman-adv-dbg: got batman_if (null) for net_dev 80845c00 batman-adv-dbg: got event 5 for net_dev 8086f000 batman-adv-dbg: will add net_device 8086f000 to if_list batman-adv-dbg: added net_device 8086f000 to if_list as 8042b900 batman-adv-dbg: got batman_if 8042b900 for net_dev 8086f000 batman-adv-dbg: got event 1 for net_dev 8086f000 batman-adv-dbg: got batman_if 8042b900 for net_dev 8086f000 batman-adv-dbg: hardif_activate_interface(8054eec0, 8042b900) batman-adv-dbg: got event 5 for net_dev 80f0d800 batman-adv-dbg: will add net_device 80f0d800 to if_list batman-adv-dbg: added net_device 80f0d800 to if_list as 8042b880 batman-adv-dbg: got batman_if 8042b880 for net_dev 80f0d800 batman-adv-dbg: got event 1 for net_dev 80f0d800 batman-adv-dbg: got batman_if 8042b880 for net_dev 80f0d800 batman-adv-dbg: hardif_activate_interface(8054eec0, 8042b880) batman-adv-dbg: got event 5 for net_dev 808e9000 batman-adv-dbg: will add net_device 808e9000 to if_list batman-adv-dbg: added net_device 808e9000 to if_list as 8042b800 batman-adv-dbg: got batman_if 8042b800 for net_dev 808e9000 batman-adv-dbg: got event 1 for net_dev 808e9000 batman-adv-dbg: got batman_if 8042b800 for net_dev 808e9000 batman-adv-dbg: hardif_activate_interface(8054eec0, 8042b800) batman-adv-dbg: got event 5 for net_dev 80d03000 batman-adv-dbg: will add net_device 80d03000 to if_list batman-adv-dbg: added net_device 80d03000 to if_list as 8042b780 batman-adv-dbg: got batman_if 8042b780 for net_dev 80d03000 batman-adv-dbg: got event 1 for net_dev 80d03000 batman-adv-dbg: got batman_if 8042b780 for net_dev 80d03000 batman-adv-dbg: hardif_activate_interface(8054eec0, 8042b780) batman-adv-dbg: got event 5 for net_dev 80c74800 batman-adv-dbg: will add net_device 80c74800 to if_list batman-adv-dbg: added net_device 80c74800 to if_list as 8042b700 batman-adv-dbg: got batman_if 8042b700 for net_dev 80c74800 batman-adv-dbg: got event 5 for net_dev 8054ec00 batman-adv-dbg: will add net_device 8054ec00 to if_list batman-adv-dbg: got batman_if (null) for net_dev 8054ec00 batman-adv:B.A.T.M.A.N. advanced 2010.0.0 (compatibility version 8) loaded batman-adv-dbg: got event 13 for net_dev 8054ec00 batman-adv-dbg: got batman_if (null) for net_dev 8054ec00 batman-adv-dbg: got event 1 for net_dev 8054ec00 batman-adv-dbg: got batman_if (null) for net_dev 8054ec00 device bat0 entered promiscuous mode br-lan: port 2(bat0) entering forwarding state batman-adv-dbg: got event 6 for net_dev 80c74800 batman-adv-dbg: got batman_if 8042b700 for net_dev 80c74800 batman-adv-dbg: hardif_remove_interface(8042b700) batman-adv-dbg: will remove batman_if 8042b700 batman-adv-dbg: putted netdev 80c74800 of batman_if 8042b700 batman-adv-dbg: removed batman_if 8042b700 batman-adv-dbg: got event 5 for net_dev 80c74800 batman-adv-dbg: will add net_device 80c74800 to if_list batman-adv-dbg: added net_device 80c74800 to if_list as 8042be80 batman-adv-dbg: got batman_if 8042be80 for net_dev 80c74800 batman-adv-dbg: got event 8 for net_dev 80c74800 batman-adv-dbg: got batman_if 8042be80 for net_dev 80c74800 batman-adv-dbg: got event 13 for net_dev 80c74800 batman-adv-dbg: got batman_if 8042be80 for net_dev 80c74800 b43-phy0: Loading firmware version 410.2160 (2007-05-26 15:32:10) batman-adv-dbg: got event 1 for net_dev 80c74800 batman-adv-dbg: got batman_if 8042be80 for net_dev 80c74800 batman-adv-dbg: hardif_activate_interface(8054eec0, 8042be80) batman-adv-dbg: got event 7 for net_dev 80c74800 batman-adv-dbg: got batman_if 8042be80 for net_dev 80c74800 wlan0: Creating new IBSS network, BSSID 02:12:34:56:78:9a batman-adv:Adding interface: wlan0 batman-adv:Interface activated: wlan0 batman-adv-dbg: update_min_mtu for softdevice 8054ec00 batman-adv-dbg: go through if_list batman-adv-dbg: check batman_if 8042b900 batman-adv-dbg: batman_if 8042b900 has status 0 batman-adv-dbg: batman_if 8042b900 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042b880 batman-adv-dbg: batman_if 8042b880 has status 0 batman-adv-dbg: batman_if 8042b880 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042b800 batman-adv-dbg: batman_if 8042b800 has status 0 batman-adv-dbg: batman_if 8042b800 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042b780 batman-adv-dbg: batman_if 8042b780 has status 0 batman-adv-dbg: batman_if 8042b780 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042be80 batman-adv-dbg: batman_if 8042be80 has status 4 batman-adv-dbg: compare batman_if 8042be80 with net_dev 80c74800 batman-adv-dbg: compare batman_if 8042be80 with 1524 against 1500 batman-adv-dbg: batman_if 8042be80 round got min_mtu 1500 batman-adv-dbg: final min_mtu is 1500 batman-adv-dbg: found min_mtu 1500 batman-adv-dbg: update_min_mtu for softdevice 8054ec00 batman-adv-dbg: go through if_list batman-adv-dbg: check batman_if 8042b900 batman-adv-dbg: batman_if 8042b900 has status 0 batman-adv-dbg: batman_if 8042b900 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042b880 batman-adv-dbg: batman_if 8042b880 has status 0 batman-adv-dbg: batman_if 8042b880 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042b800 batman-adv-dbg: batman_if 8042b800 has status 0 batman-adv-dbg: batman_if 8042b800 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042b780 batman-adv-dbg: batman_if 8042b780 has status 0 batman-adv-dbg: batman_if 8042b780 round got min_mtu 1500 batman-adv-dbg: check batman_if 8042be80 batman-adv-dbg: batman_if 8042be80 has status 4 batman-adv-dbg: compare batman_if 8042be80 with net_dev 80c74800 batman-adv-dbg: compare batman_if 8042be80 with 1524 against 1500 batman-adv-dbg: batman_if 8042be80 round got min_mtu 1500 batman-adv-dbg: final min_mtu is 1500 batman-adv-dbg: found min_mtu 1500 root@OpenWrt:/# Greetings, Tim

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