- 31 Jan, 2013 9 commits
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Eric Dumazet authored
Supporting access to skb->pkt_type is a bit tricky if we want to have a generic code, allowing pkt_type to be moved in struct sk_buff pkt_type is a bit field, so compiler cannot really help us to find its offset. Let's use a helper for this : It will throw a one time message if pkt_type no longer starts at a byte boundary or is no longer a 3bit field. Reported-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Maciej Żenczykowski <maze@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jitendra Kalsaria authored
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Jitendra Kalsaria <jitendra.kalsaria@qlogic.com> Signed-off-by:
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Stephen Hemminger authored
Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:
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Manish chopra authored
Signed-off-by:
Manish chopra <manish.chopra@qlogic.com> Signed-off-by:
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Shahed Shaikh authored
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Shahed Shaikh <shahed.shaikh@qlogic.com> Signed-off-by:
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Manish chopra authored
o ipv4 address was not getting programmed properly because of improper byte order conversion Signed-off-by:
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Manish chopra authored
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Manish chopra authored
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Shahed Shaikh authored
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- 30 Jan, 2013 7 commits
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Jiri Pirko authored
Makes more sense to have randomly generated address by default than to have all zeroes. It also allows user to for example put the bond into bridge without need to have any slaves in it. Also note that this changes only behaviour of bonds with no slaves. Once the first slave device is enslaved, its address will be used (no change here). Also, fix dev_assign_type values on the way. Reported-by:
Pavel Šimerda <psimerda@redhat.com> Signed-off-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
Jay Vosburgh <fubar@us.ibm.com> Signed-off-by:
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Michał Mirosław authored
Instead of jumping aroung bugs that are easily fixed just don't let them in: affected drivers should be either fixed or have NETIF_F_HW_VLAN_FILTER removed from advertised features. Quick grep in drivers/net shows two drivers that have NETIF_F_HW_VLAN_FILTER but not ndo_vlan_rx_add/kill_vid(), but those are false-positives (features are commented out). OTOH two drivers have ndo_vlan_rx_add/kill_vid() implemented but don't advertise NETIF_F_HW_VLAN_FILTER. Those are: +ethernet/cisco/enic/enic_main.c +ethernet/qlogic/qlcnic/qlcnic_main.c Signed-off-by:
Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
Signed-off-by:
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
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YOSHIFUJI Hideaki / 吉藤英明 authored
All users of xfrm_addr_cmp() use its result as boolean. Introduce xfrm_addr_equal() (which is equal to !xfrm_addr_cmp()) and convert all users. Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
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YOSHIFUJI Hideaki / 吉藤英明 authored
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- 29 Jan, 2013 23 commits
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git://git.open-mesh.org/linux-mergeDavid S. Miller authored
Included changes: - fix recently introduced output behaviour Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller authored
Bring in the 'net' tree so that we can get some ipv4/ipv6 bug fixes that some net-next work will build upon. Signed-off-by: -
Hannes Frederic Sowa authored
This patch adds anti-spoofing checks in sit.c as specified in RFC3964 section 5.2 for 6to4 and RFC5969 section 12 for 6rd. I left out the checks which could easily be implemented with netfilter. Specifically this patch adds following logic (based loosely on the pseudocode in RFC3964 section 5.2): if prefix (inner_src_v6) == rd6_prefix (2002::/16 is the default) and outer_src_v4 != embedded_ipv4 (inner_src_v6) drop if prefix (inner_dst_v6) == rd6_prefix (or 2002::/16 is the default) and outer_dst_v4 != embedded_ipv4 (inner_dst_v6) drop accept To accomplish the specified security checks proposed by above RFCs, it is still necessary to employ uRPF filters with netfilter. These new checks only kick in if the employed addresses are within the 2002::/16 or another range specified by the 6rd-prefix (which defaults to 2002::/16). Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Cc: David Miller <davem@davemloft.net> Signed-off-by:Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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Claudiu Manoil authored
* remove unused members(!): imask, ievent * move space consuming interrupt name strings (int_name_* members) to external structures, unessential for the driver's hot path * keep high priority hot path data within the first 2 cache lines This reduces struct gfar_priv_grp from 6 to 3 cache lines. (Also fixed checkpatch warnings for the old code, in the process.) Signed-off-by:
Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by:
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Claudiu Manoil authored
Factor out redundant code (improve readability, source code size). Signed-off-by:
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Claudiu Manoil authored
Resize and regroup structure members to eliminate memory holes and to pack the structure into 2 cache lines (from 3). tx_ring_size was resized from 4 to 2 bytes and few members were re-grouped in order to eliminate byte holes and achieve compactness. Where possible, few members were grouped according to their usage and access order (i.e. start_xmit vs. clean_tx_ring members), less important members were pushed at the end. Signed-off-by:
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Eric W. Biederman authored
When attempting to build linux-next with user namespaces enabled I ran into this fun build error. CC net/ipv6/inet6_connection_sock.o .../net/ipv6/inet6_connection_sock.c: In function ‘inet6_csk_bind_conflict’: .../net/ipv6/inet6_connection_sock.c:37:12: error: incompatible types when initializing type ‘int’ using type ‘kuid_t’ .../net/ipv6/inet6_connection_sock.c:54:30: error: incompatible type for argument 1 of ‘uid_eq’ .../include/linux/uidgid.h:48:20: note: expected ‘kuid_t’ but argument is of type ‘int’ make[3]: *** [net/ipv6/inet6_connection_sock.o] Error 1 make[2]: *** [net/ipv6] Error 2 make[2]: *** Waiting for unfinished jobs.... Using kuid_t instead of int to hold the uid fixes this. Cc: Tom Herbert <therbert@google.com> Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Cong Wang authored
v3: make pktgen_threads list per-namespace v2: remove a useless check This patch add net namespace to pktgen, so that we can use pktgen in different namespaces. Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by:
Cong Wang <amwang@redhat.com> Acked-by:
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Frank Li authored
Add napi support Before this patch iperf -s -i 1 ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 10.192.242.153 port 5001 connected with 10.192.242.138 port 50004 [ ID] Interval Transfer Bandwidth [ 4] 0.0- 1.0 sec 41.2 MBytes 345 Mbits/sec [ 4] 1.0- 2.0 sec 43.7 MBytes 367 Mbits/sec [ 4] 2.0- 3.0 sec 42.8 MBytes 359 Mbits/sec [ 4] 3.0- 4.0 sec 43.7 MBytes 367 Mbits/sec [ 4] 4.0- 5.0 sec 42.7 MBytes 359 Mbits/sec [ 4] 5.0- 6.0 sec 43.8 MBytes 367 Mbits/sec [ 4] 6.0- 7.0 sec 43.0 MBytes 361 Mbits/sec After this patch [ 4] 2.0- 3.0 sec 51.6 MBytes 433 Mbits/sec [ 4] 3.0- 4.0 sec 51.8 MBytes 435 Mbits/sec [ 4] 4.0- 5.0 sec 52.2 MBytes 438 Mbits/sec [ 4] 5.0- 6.0 sec 52.1 MBytes 437 Mbits/sec [ 4] 6.0- 7.0 sec 52.1 MBytes 437 Mbits/sec [ 4] 7.0- 8.0 sec 52.3 MBytes 439 Mbits/sec Signed-off-by:
Frank Li <Frank.Li@freescale.com> Signed-off-by:
Fugang Duan <B38611@freescale.com> Signed-off-by:
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Barry Grussling authored
Cleanup the format of ethoc.c to meet network driver style as per checkpatch.pl. Signed-off-by:
Barry Grussling <barry@grussling.com> Signed-off-by:
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David Ward authored
A GRE tunnel can be configured so that outgoing tunnel packets inherit the value of the TOS field from the inner IP header. In doing so, when a non-IP packet is transmitted through the tunnel, the TOS field will always be set to 0. Instead, the user should be able to configure a different TOS value as the fallback to use for non-IP packets. This is helpful when the non-IP packets are all control packets and should be handled by routers outside the tunnel as having Internet Control precedence. One example of this is the NHRP packets that control a DMVPN-compatible mGRE tunnel; they are encapsulated directly by GRE and do not contain an inner IP header. Under the existing behavior, the IFLA_GRE_TOS parameter must be set to '1' for the TOS value to be inherited. Now, only the least significant bit of this parameter must be set to '1', and when a non-IP packet is sent through the tunnel, the upper 6 bits of this same parameter will be copied into the TOS field. (The ECN bits get masked off as before.) This behavior is backwards-compatible with existing configurations and iproute2 versions. Signed-off-by:
David Ward <david.ward@ll.mit.edu> Signed-off-by:
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Jiri Pirko authored
There are some usecase when lifetime of ipv4 addresses might be helpful. For example: 1) initramfs networkmanager uses a DHCP daemon to learn network configuration parameters 2) initramfs networkmanager addresses, routes and DNS configuration 3) initramfs networkmanager is requested to stop 4) initramfs networkmanager stops all daemons including dhclient 5) there are addresses and routes configured but no daemon running. If the system doesn't start networkmanager for some reason, addresses and routes will be used forever, which violates RFC 2131. This patch is essentially a backport of ivp6 address lifetime mechanism for ipv4 addresses. Current "ip" tool supports this without any patch (since it does not distinguish between ipv4 and ipv6 addresses in this perspective. Also, this should be back-compatible with all current netlink users. Reported-by:
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David S. Miller authored
Jesper Dangaard Brouer says: ==================== This patchset is V2, with some trivial code fixes, which were noticed by DaveM. It is still a partly respin of my fragmentation optimization patches: http://thread.gmane.org/gmane.linux.network/250914 This is not the complete patchset, from the gmane link above. In this patchset, I primarily focus on adjusting cacheline for better SMP/NUMA performance. Once this patchset have been agreed upon, I will continue and respin the rest of my patches. This time around, I have created a frag DoS generator, via the tool trafgen (http://netsniff-ng.org/). To create a stable DoS scenario (no longer relying on frame dropping due to disabled flow-control). Two 10G interfaces are under-test, and uses Ethernet flow-control. A third interface is used for generating the DoS attack (this interface is also 10G, but it does not need to be, as 500Kpps DoS is enough). Test types summary (netperf): Test-20G64K == 2x10G with 65K fragments Test-20G3F == 2x10G with 3x fragments (3*1472 bytes) Test-20G64K+DoS == Same as 20G64K with frag DoS Test-20G3F+DoS == Same as 20G3F with frag DoS Patch list: Patch-01 - net: cacheline adjust struct netns_frags for better frag performance Patch-02 - net: cacheline adjust struct inet_frags for better frag performance Patch-03 - net: cacheline adjust struct inet_frag_queue Patch-04 - net: frag helper functions for mem limit tracking Patch-05 - net: use lib/percpu_counter API for fragmentation mem accounting Patch-06 - net: frag, move LRU list maintenance outside of rwlock Performance table summary: Test-type: Test-20G64K Test-20G3F 20G64K+DoS 20G3F+DoS ---------- ----------- ---------- ---------- --------- net-next: 15114.5 Mbit/s 8954.21 2444.28 3918.01 Mbit/s Patch-01: 16075.8 Mbit/s 8976.18 2621.49 4072.79 Mbit/s Patch-02: 17806.9 Mbit/s 9280.32 2478.62 4274.59 Mbit/s Patch-03: 17317.4 Mbit/s 9308.62 2546.05 4336.59 Mbit/s Patch-04: 17635.9 Mbit/s 9256.16 2535.25 4327.63 Mbit/s Patch-05: 18027.0 Mbit/s 9918.99 2492.62 3621.68 Mbit/s Patch-06: 18486.7 Mbit/s 10723.20 3657.85 4560.64 Mbit/s I cannot explain the under-DoS regression that patch-05/percpu_counter introduces. But patch-06/LRU-lock corrects the situation again. Below is a testlab setup description, with links to the trafgen DoS packet config used. Testlab ======= Server setup ------------ The machine acting as a server: - 2x CPU (E5-2630) - Thus a NUMA arch/machine - 4x 10Gbit/s ports - NICs 2x Intel Dual port 82599 based (driver ixgbe) Setup: - Interfaces uses Ethernet flow control - Flush all iptables - Remove all iptables related module. - Kill irqbalance - Pin each 10G NIC port to a *single* CPU each Pinning can easily be done by command hacks:: for x in /proc/irq/*/eth8*/../smp_affinity_list ; do echo 1 > $x; done for x in /proc/irq/*/eth9*/../smp_affinity_list ; do echo 3 > $x; done for x in /proc/irq/*/eth31*/../smp_affinity_list; do echo 6 > $x; done for x in /proc/irq/*/eth32*/../smp_affinity_list; do echo 8 > $x; done Notice NUMA setting: The CPU to NIC tying is carefully choosen according to the NUMA node setup. Thus, NICs connected to a PCI-e slot that is connected to a physical CPU socket are tied together. Choosing only a single CPU per NIC (port) is just to ease provoking and debugging this performance issue. (In real setups, you can choose more CPU, just remember the NUMA node in the equation). Tools ----- Netperf is used, with option -T to ensure CPU binding. The netserver processes, are NAPI pinned:: numactl -m0 -c0 netserver numactl -m1 -c 1 netserver -p 1337 I now have a frag DoS generator, created via the tool: trafgen (see: http://netsniff-ng.org/) Trafgen packet config file: http://people.netfilter.org/hawk/frag_work/trafgen/frag_packet03_small_frag.txf Notice, I'm using features of trafgen, recently developed by Daniel Borkmann, thus you need the latest git tree to use my trafgen packet config. git://github.com/borkmann/netsniff-ng.git Command line: trafgen --dev eth51 --conf frag_packet03_small_frag.txf -V -k 100 --cpus 2 Tests types ----------- Test(20G64K) UDP-64K 2x 10Gbit/s with no DoS traffic: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ export SIZE=$((65507)); export TIME=$((20)); export LOG=/tmp/netperf.log ;\ netperf -p 1337 -H 192.168.31.2 -T7,7 -t UDP_STREAM -l $TIME -- -m $SIZE >> ${LOG}.31 &\ netperf -H 192.168.81.2 -T2,2 -t UDP_STREAM -l $TIME -- -m $SIZE >> ${LOG}.81 && \ wait $! && tail -n3 ${LOG}.* && \ tail -n3 ${LOG}.{31,81} | awk 'BEGIN{sum=0;} /212992 / {sum+=$4; print " +"$4} /==/ {print " file:"$2} END{print "sum:"sum" Mbit/s"}' Test(20G3F) UDP-3xfrags 2x 10Gbit/s with no DoS traffic: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ export SIZE=$((3*1472)); export TIME=$((20)); export LOG=/tmp/netperf.log ;\ netperf -p 1337 -H 192.168.31.2 -T7,7 -t UDP_STREAM -l $TIME -- -m $SIZE >> ${LOG}.31 &\ netperf -H 192.168.81.2 -T2,2 -t UDP_STREAM -l $TIME -- -m $SIZE >> ${LOG}.81 && \ wait $! && tail -n3 ${LOG}.* && \ tail -n3 ${LOG}.{31,81} | awk 'BEGIN{sum=0;} /212992 / {sum+=$4; print " +"$4} /==/ {print " file:"$2} END{print "sum:"sum" Mbit/s"}' Awk script for summming results: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ tail -n3 ${LOG}.{31,81} | awk 'BEGIN{sum=0;} /212992 / {sum+=$4; print " +"$4} /==/ {print " file:"$2} END{print "sum:"sum" Mbit/s"}' ==================== Signed-off-by:
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Jesper Dangaard Brouer authored
Updating the fragmentation queues LRU (Least-Recently-Used) list, required taking the hash writer lock. However, the LRU list isn't tied to the hash at all, so we can use a separate lock for it. Original-idea-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by:
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Jesper Dangaard Brouer authored
Replace the per network namespace shared atomic "mem" accounting variable, in the fragmentation code, with a lib/percpu_counter. Getting percpu_counter to scale to the fragmentation code usage requires some tweaks. At first view, percpu_counter looks superfast, but it does not scale on multi-CPU/NUMA machines, because the default batch size is too small, for frag code usage. Thus, I have adjusted the batch size by using __percpu_counter_add() directly, instead of percpu_counter_sub() and percpu_counter_add(). The batch size is increased to 130.000, based on the largest 64K fragment memory usage. This does introduce some imprecise memory accounting, but its does not need to be strict for this use-case. It is also essential, that the percpu_counter, does not share cacheline with other writers, to make this scale. Signed-off-by:
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Jesper Dangaard Brouer authored
This change is primarily a preparation to ease the extension of memory limit tracking. The change does reduce the number atomic operation, during freeing of a frag queue. This does introduce a some performance improvement, as these atomic operations are at the core of the performance problems seen on NUMA systems. Signed-off-by:
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Jesper Dangaard Brouer authored
Fragmentation code cacheline adjusting of struct inet_frag_queue. Take advantage of the size of struct timer_list, and move all but spinlock_t lock, below the timer struct. On 64-bit 'lru_list', 'list' and 'refcnt', fits exactly into the next cacheline, and a new cacheline starts at 'fragments'. The netns_frags *net pointer is moved to the end of the struct, because its used in a compare, with "next/close-by" elements of which this struct is embedded into. Signed-off-by:
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Jesper Dangaard Brouer authored
The globally shared rwlock, of struct inet_frags, shares cacheline with the 'rnd' number, which is used by the hash calculations. Fix this, as this obviously is a bad idea, as unnecessary cache-misses will occur when accessing the 'rnd' number. Also small note that, moving function ptr (*match) up in struct, is to avoid it lands on the next cacheline (on 64-bit). Signed-off-by:
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Jesper Dangaard Brouer authored
This small cacheline adjustment of struct netns_frags improves performance significantly for the fragmentation code. Struct members 'lru_list' and 'mem' are both hot elements, and it hurts performance, due to cacheline bouncing at every call point, when they share a cacheline. Also notice, how mem is placed together with 'high_thresh' and 'low_thresh', as they are used in the compare operations together. Signed-off-by:
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Felipe Balbi authored
just as it should have been. It also helps removing the, now unnecessary, workqueue. Signed-off-by:
Felipe Balbi <balbi@ti.com> Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
When allocating memory for neighbour cache entry, if tbl->entry_size is not set, we always calculate sizeof(struct neighbour) + tbl->key_len, which is common in the same table. With this change, set tbl->entry_size during the table initialization phase, if it was not set, and use it in neigh_alloc() and neighbour_priv(). This change also allow us to have both of protocol private data and device priate data at tha same time. Note that the only user of prototcol private is DECnet and the only user of device private is ATM CLIP. Since those are exclusive, we have not been facing issues here. Signed-off-by:
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bingtian.ly@taobao.com authored
I found if we write a larger than 4GB value to some sysctl variables, the sending syscall will hang up forever, because these variables are 32 bits, such large values make them overflow to 0 or negative. This patch try to fix overflow or prevent from zero value setup of below sysctl variables: net.core.wmem_default net.core.rmem_default net.core.rmem_max net.core.wmem_max net.ipv4.udp_rmem_min net.ipv4.udp_wmem_min net.ipv4.tcp_wmem net.ipv4.tcp_rmem Signed-off-by:Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
Li Yu <raise.sail@gmail.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpcLinus Torvalds authored
Pull powerpc fixes from Benjamin Herrenschmidt: "Whenever you have a chance between two dives, you might want to consider pulling my merge branch to pickup a few fixes for 3.8 that have been accumulating for the last couple of weeks (I was myself travelling then on vacation). Nothing major, just a handful of powerpc bug fixes that I consider worth getting in before 3.8 goes final." And I'll have everybody know that I'm not diving for several days yet. Snif. * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Max next_tb to prevent from replaying timer interrupt powerpc: kernel/kgdb.c: Fix memory leakage powerpc/book3e: Disable interrupt after preempt_schedule_irq powerpc/oprofile: Fix error in oprofile power7_marked_instr_event() function powerpc/pasemi: Fix crash on reboot powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning for ppc32
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- 28 Jan, 2013 1 commit
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Jamie Gloudon authored
Switch to use ndo_get_stats64 to get 64bit statistics. Signed-off-by:
Jamie Gloudon <jamie.gloudon@gmail.com> Tested-by:
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