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* [L2TP]: Add PPPoL2TP in-kernel documentationJames Chapman2007-07-111-0/+169
| | | | | Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [L2TP]: Add PPPoL2TP maintainerJames Chapman2007-07-111-0/+5
| | | | | Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PPPOL2TP]: Use proper printf format specifier for size_t.David S. Miller2007-07-111-2/+2
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [L2TP]: PPP over L2TP driver coreJames Chapman2007-07-113-0/+2500
| | | | | | | | | | | | This driver handles only L2TP data frames; control frames are handled by a userspace application. It implements L2TP using the PPPoX socket family. There is a PPPoX socket for each L2TP session in an L2TP tunnel. PPP data within each session is passed through the kernel's PPP subsystem via this driver. Kernel parameters of each socket can be read or modified using ioctl() or [gs]etsockopt() calls. Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [L2TP]: Changes to existing ppp and socket kernel headers for L2TPJames Chapman2007-07-115-2/+101
| | | | | | | | | | | | | | | | | | Add struct sockaddr_pppol2tp to carry L2TP-specific address information for the PPPoX (PPPoL2TP) socket. Unfortunately we can't use the union inside struct sockaddr_pppox because the L2TP-specific data is larger than the current size of the union and we must preserve the size of struct sockaddr_pppox for binary compatibility. Also add a PPPIOCGL2TPSTATS ioctl to allow userspace to obtain L2TP counters and state from the kernel. Add new if_pppol2tp.h header. [ Modified to use aligned_u64 in statistics structure -DaveM ] Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [UDP]: Introduce UDP encapsulation type for L2TPJames Chapman2007-07-112-4/+29
| | | | | | | | | | | | | | | | | | This patch adds a new UDP_ENCAP_L2TPINUDP encapsulation type for UDP sockets. When a UDP socket's encap_type is UDP_ENCAP_L2TPINUDP, the skb is delivered to a function pointed to by the udp_sock's encap_rcv funcptr. If the skb isn't wanted by L2TP, it returns >0, which causes it to be passed through to UDP. Include padding to put the new encap_rcv field on a 4-byte boundary. Previously, the only user of UDP encap sockets was ESP, so when CONFIG_XFRM was not defined, some of the encap code was compiled out. This patch changes that. As a result, udp_encap_rcv() will now do a little more work when CONFIG_XFRM is not defined. Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: dev: secondary unicast address supportPatrick McHardy2007-07-113-54/+139
| | | | | | | | | | | | Add support for configuring secondary unicast addresses on network devices. To support this devices capable of filtering multiple unicast addresses need to change their set_multicast_list function to configure unicast filters as well and assign it to dev->set_rx_mode instead of dev->set_multicast_list. Other devices are put into promiscous mode when secondary unicast addresses are present. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: dev_mcast: switch to generic net_device address listsPatrick McHardy2007-07-112-91/+22Star
| | | | | | | | Use generic net_device address lists for multicast list handling. Some defines are used to keep drivers working. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: dev: introduce generic net_device address listsPatrick McHardy2007-07-112-0/+80
| | | | | | | | | | Introduce struct dev_addr_list and list maintenance functions based on dev_mc_list and the related functions. This will be used by follow-up patches for both multicast and secondary unicast addresses. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: dev_mcast: unexport dev_mc_uploadPatrick McHardy2007-07-112-4/+0Star
| | | | | | | | | dev_mc_add/dev_mc_delete take care of uploading the list when necessary and thats the only interface other code should use. Also remove two incorrect calls in DECnet. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: IPV6 checksum offloading in network devicesStephen Hemminger2007-07-119-17/+49
| | | | | | | | | | | | | | | The existing model for checksum offload does not correctly handle devices that can offload IPV4 and IPV6 only. The NETIF_F_HW_CSUM flag implies device can do any arbitrary protocol. This patch: * adds NETIF_F_IPV6_CSUM for those devices * fixes bnx2 and tg3 devices that need it * add NETIF_F_IPV6_CSUM to ipv6 output (incl GSO) * fixes assumptions about NETIF_F_ALL_CSUM in nat * adjusts bridge union of checksumming computation Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Add module alias for transformation type.Masahide NAKAMURA2007-07-1110-1/+20
| | | | | | | | | | | | | | | It is clean-up for XFRM type modules and adds aliases with its protocol: ESP, AH, IPCOMP, IPIP and IPv6 for IPsec ROUTING and DSTOPTS for MIPv6 It is almost the same thing as XFRM mode alias, but it is added new defines XFRM_PROTO_XXX for preprocessing since some protocols are defined as enum. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Acked-by: Ingo Oeser <netdev@axxeo.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6] MIP6: Loadable module support for MIPv6.Masahide NAKAMURA2007-07-1118-46/+88
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes MIPv6 loadable module named "mip6". Here is a modprobe.conf(5) example to load it automatically when user application uses XFRM state for MIPv6: alias xfrm-type-10-43 mip6 alias xfrm-type-10-60 mip6 Some MIPv6 feature is not included by this modular, however, it should not be affected to other features like either IPsec or IPv6 with and without the patch. We may discuss XFRM, MH (RAW socket) and ancillary data/sockopt separately for future work. Loadable features: * MH receiving check (to send ICMP error back) * RO header parsing and building (i.e. RH2 and HAO in DSTOPTS) * XFRM policy/state database handling for RO These are NOT covered as loadable: * Home Address flags and its rule on source address selection * XFRM sub policy (depends on its own kernel option) * XFRM functions to receive RO as IPv6 extension header * MH sending/receiving through raw socket if user application opens it (since raw socket allows to do so) * RH2 sending as ancillary data * RH2 operation with setsockopt(2) Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6] MIP6: Kill unnecessary ifdefs.Masahide NAKAMURA2007-07-114-12/+2Star
| | | | | | | | | | | Kill unnecessary CONFIG_IPV6_MIP6. o It is redundant for RAW socket to keep MH out with the config then it can handle any protocol. o Clean-up at AH. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RTNETLINK]: Fix rtnetlink compat attribute patchPatrick McHardy2007-07-112-7/+9
| | | | | | | Sent the wrong patch previously. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RTNETLINK]: Add nested compat attributePatrick McHardy2007-07-112-0/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a nested compat attribute type that can be used to convert attributes that contain a structure to nested attributes in a backwards compatible way. The attribute looks like this: struct { [ compat contents ] struct rtattr { .rta_len = total size, .rta_type = type, } rta; struct old_structure struct; [ nested top-level attribute ] struct rtattr { .rta_len = nest size, .rta_type = type, } nest_attr; [ optional 0 .. n nested attributes ] struct rtattr { .rta_len = private attribute len, .rta_type = private attribute typ, } nested_attr; struct nested_data data; }; Since both userspace and kernel deal correctly with attributes that are larger than expected old versions will just parse the compat part and ignore the rest. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETLINK]: attr: add nested compat attribute typePatrick McHardy2007-07-112-0/+95
| | | | | | | | | Add a nested compat attribute type that can be used to convert attributes that contain a structure to nested attributes in a backwards compatible way. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SKBUFF]: Keep track of writable header len of headerless clonesPatrick McHardy2007-07-113-5/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently NAT (and others) that want to modify cloned skbs copy them, even if in the vast majority of cases its not necessary because the skb is a clone made by TCP and the portion NAT wants to modify is actually writable because TCP release the header reference before cloning. The problem is that there is no clean way for NAT to find out how long the writable header area is, so this patch introduces skb->hdr_len to hold this length. When a headerless skb is cloned skb->hdr_len is set to the current headroom, for regular clones it is copied from the original. A new function skb_clone_writable(skb, len) returns whether the skb is writable up to len bytes from skb->data. To avoid enlarging the skb the mac_len field is reduced to 16 bit and the new hdr_len field is put in the remaining 16 bit. I've done a few rough benchmarks of NAT (not with this exact patch, but a very similar one). As expected it saves huge amounts of system time in case of sendfile, bringing it down to basically the same amount as without NAT, with sendmsg it only helps on loopback, probably because of the large MTU. Transmit a 1GB file using sendfile/sendmsg over eth0/lo with and without NAT: - sendfile eth0, no NAT: sys 0m0.388s - sendfile eth0, NAT: sys 0m1.835s - sendfile eth0: NAT + path: sys 0m0.370s (~ -80%) - sendfile lo, no NAT: sys 0m0.258s - sendfile lo, NAT: sys 0m2.609s - sendfile lo, NAT + patch: sys 0m0.260s (~ -90%) - sendmsg eth0, no NAT: sys 0m2.508s - sendmsg eth0, NAT: sys 0m2.539s - sendmsg eth0, NAT + patch: sys 0m2.445s (no change) - sendmsg lo, no NAT: sys 0m2.151s - sendmsg lo, NAT: sys 0m3.557s - sendmsg lo, NAT + patch: sys 0m2.159s (~ -40%) I expect other users can see a similar performance improvement, packet mangling iptables targets, ipip and ip_gre come to mind .. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: qdisc_restart - couple of optimizations.Krishna Kumar2007-07-111-4/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | Changes : - netif_queue_stopped need not be called inside qdisc_restart as it has been called already in qdisc_run() before the first skb is sent, and in __qdisc_run() after each intermediate skb is sent (note : we are the only sender, so the queue cannot get stopped while the tx lock was got in the ~LLTX case). - BUG_ON((int) q->q.qlen < 0) was a relic from old times when -1 meant more packets are available, and __qdisc_run used to loop when qdisc_restart() returned -1. During those days, it was necessary to make sure that qlen is never less than zero, since __qdisc_run would get into an infinite loop if no packets are on the queue and this bug in qdisc was there (and worse - no more skbs could ever get queue'd as we hold the queue lock too). With Herbert's recent change to return values, this check is not required. Hopefully Herbert can validate this change. If at all this is required, it should be added to skb_dequeue (in failure case), and not to qdisc_qlen. Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: qdisc_restart - readability changes plus one bug fix.Krishna Kumar2007-07-111-81/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | New changes : - Incorporated Peter Waskiewicz's comments. - Re-added back one warning message (on driver returning wrong value). Previous changes : - Converted to use switch/case code which looks neater. - "if (ret == NETDEV_TX_LOCKED && lockless)" is buggy, and the lockless check should be removed, since driver will return NETDEV_TX_LOCKED only if lockless is true and driver has to do the locking. In the original code as well as the latest code, this code can result in a bug where if LLTX is not set for a driver (lockless == 0) but the driver is written wrongly to do a trylock (despite LLTX being set), the driver returns LOCKED. But since lockless is zero, the packet is requeue'd instead of calling collision code which will issue warning and free up the skb. Instead this skb will be retried with this driver next time, and the same result will ensue. Removing this check will catch these driver bugs instead of hiding the problem. I am keeping this change to readability section since : a. it is confusing to check two things as it is; and b. it is difficult to keep this check in the changed 'switch' code. - Changed some names, like try_get_tx_pkt to dev_dequeue_skb (as that is the work being done and easier to understand) and do_dev_requeue to dev_requeue_skb, merged handle_dev_cpu_collision and tx_islocked to dev_handle_collision (handle_dev_cpu_collision is a small routine with only one caller, so there is no need to have two separate routines which also results in getting rid of two macros, etc. - Removed an XXX comment as it should never fail (I suspect this was related to batch skb WIP, Jamal ?). Converted some functions to original coding style of having the return values and the function name on same line, eg prio2list. Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Fix a bug in the send time processingGerrit Renker2007-07-111-1/+1
| | | | | | | | | | | | | | | | | | ccid3_hc_tx_send_packet currently returns 0 when the time difference between current time and t_nom is less than 1000 microseconds. In this case the packet is sent immediately; but, unlike other packets that can be emitted on first attempt, it will not have its window counter updated and its options set as required. This is a bug. Fix: Require the time difference to be at least 1000 microseconds. The algorithm then converges: time differences > 1000 microseconds trigger the timer in dccp_write_xmit; after timer expiry this function is tried again; when the time difference is less than 1000, the packet will have its options added and window counter updated as required. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [CCID3]: Sending time: update to ktime_tGerrit Renker2007-07-112-22/+16Star
| | | | | | | | | | | This updates the computation of t_nom and t_last_win_count to use the newer gettimeofday interface. Committer note: used ktime_to_timeval to set the 'now' variable to t_ld in ccid3hctx_no_feedback_timer Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [KTIME]: Introduce ktime_add_usArnaldo Carvalho de Melo2007-07-111-0/+5
| | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [KTIME]: Introduce ktime_us_deltaGerrit Renker2007-07-111-0/+5
| | | | | | | | | | This provides a reusable time difference function which returns the difference in microseconds, as often used in the DCCP code. Commiter note: renamed ktime_delta to ktime_us_delta and put it in ktime.h. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* loss_interval: make struct dccp_li_hist_entry privateArnaldo Carvalho de Melo2007-07-112-10/+9Star
| | | | | | net/dccp/ccids/lib/loss_interval.c is the only place where this struct is used. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* loss_interval: Nuke dccp_li_histArnaldo Carvalho de Melo2007-07-113-86/+36Star
| | | | | | | | It had just a slab cache, so, for the sake of simplicity just make dccp_trfc_lib module init routine create the slab cache, no need for users of the lib to create a private loss_interval object. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* loss_interval: Make dccp_li_hist_entry_{new,delete} privateArnaldo Carvalho de Melo2007-07-112-14/+14
| | | | | | Not used outside the loss_interval code anymore. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* loss_interval: unexport dccp_li_hist_interval_newArnaldo Carvalho de Melo2007-07-112-7/+3Star
| | | | | | Now its only used inside the loss_interval code. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* [DCCP] loss_interval: Move ccid3_hc_rx_update_li to loss_intervalArnaldo Carvalho de Melo2007-07-113-170/+176
| | | | | | | | Renaming it to dccp_li_update_li. Also based on previous work by Ian McDonald. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [CCID3]: Pass ccid3_li_hist to ccid3_hc_rx_update_liArnaldo Carvalho de Melo2007-07-111-6/+6
| | | | | | | | Now ccid3_hc_rx_update_li is ready to be moved to net/dccp/ccids/lib/loss_interval, it uses the same interface as the other functions there. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* Remove accesses to ccid3_hc_rx_sock in ccid3_hc_rx_{update,calc_first}_liArnaldo Carvalho de Melo2007-07-111-21/+41
| | | | | | | | | This is a preparatory patch for moving these loss interval functions from net/dccp/ccids/ccid3.c to net/dccp/ccids/lib/loss_interval.c. Based on a patch by Ian McDonald. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* loss_interval: Fix timeval initialisationIan McDonald2007-07-111-1/+1
| | | | | | | | When compiling with EXTRA_CFLAGS=-W noticed that tstamp is not initialised correctly in dccp_li_calc_first_li. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
* Fix dccp_sum_coverageIan McDonald2007-07-111-2/+2
| | | | | | | | When compiling with EXTRA_CFLAGS=-W notice that we have signed/unsigned issue in dccp.h. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
* ccid3: Update copyrightsIan McDonald2007-07-113-6/+6
| | | | | Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [VLAN]: Use rtnl_link APIPatrick McHardy2007-07-115-11/+300
| | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Introduce symbolic constants for flag valuesPatrick McHardy2007-07-113-7/+12
| | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Keep track of number of QoS mappingsPatrick McHardy2007-07-112-6/+24
| | | | | | | | Keep track of the number of configured ingress/egress QoS mappings to avoid iteration while calculating the netlink attribute size. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Use 32 bit value for skb->priority mappingPatrick McHardy2007-07-112-4/+4
| | | | | | | skb->priority has only 32 bits and even VLAN uses 32 bit values in its API. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Return proper error codes in register_vlan_devicePatrick McHardy2007-07-111-18/+14Star
| | | | | | | | The returned device is unused, return proper error codes instead and avoid having the ioctl handler guess the error. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Move device registation to seperate functionPatrick McHardy2007-07-111-36/+47
| | | | | | | | Move device registration and configuration of the underlying device to a seperate function. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Split up device checksPatrick McHardy2007-07-111-24/+32
| | | | | | | Move the checks of the underlying device to a seperate function. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Move vlan_group allocation to seperate functionPatrick McHardy2007-07-111-37/+41
| | | | | | | | | | Move group allocation to a seperate function to clean up the code a bit and allocate groups before registering the device. Device registration is globally visible and causes netlink events, so we shouldn't fail afterwards. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Move some device intialization code to dev->init callbackPatrick McHardy2007-07-111-46/+46
| | | | | | | | | | Move some device initialization code to new dev->init callback to make it shareable with netlink. Additionally this fixes a minor bug, dev->iflink is set after registration, which causes an incorrect value in the initial netlink message. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [VLAN]: Convert name-based configuration functions to struct netdevice *Patrick McHardy2007-07-113-199/+109Star
| | | | | | | | | | | | | | | | | Move the device lookup and checks to the ioctl handler under the RTNL and change all name-based interfaces to take a struct net_device * instead. This allows to use them from a netlink interface, which identifies devices based on ifindex not name. It also avoids races between the ioctl interface and the (upcoming) netlink interface since now all changes happen under the RTNL. As a nice side effect this greatly simplifies error handling in the helper functions and fixes a number of incorrect error codes like -EINVAL for device not found. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IFB]: Use rtnl_link APIPatrick McHardy2007-07-111-20/+60
| | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IFB]: Keep ifb devices on listPatrick McHardy2007-07-111-15/+21
| | | | | | | Use a list instead of an array to allow creating new devices. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DUMMY]: Use rtnl_link APIPatrick McHardy2007-07-111-20/+62
| | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DUMMY]: Keep dummy devices on listPatrick McHardy2007-07-111-18/+29
| | | | | | | Use a list instead of an array to allow creating new devices. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DUMMY]: Use dev->statsPatrick McHardy2007-07-111-13/+3Star
| | | | | | | Use dev->stats instead of netdev_priv(). Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RTNETLINK]: Link creation APIPatrick McHardy2007-07-114-7/+409
| | | | | | | Add rtnetlink API for creating, changing and deleting software devices. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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