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2009-11-29net: Move && and || to end of previous lineJoe Perches
Not including net/atm/ Compiled tested x86 allyesconfig only Added a > 80 column line or two, which I ignored. Existing checkpatch plaints willfully, cheerfully ignored. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-25net: use net_eq to compare netsOctavian Purdila
Generated with the following semantic patch @@ struct net *n1; struct net *n2; @@ - n1 == n2 + net_eq(n1, n2) @@ struct net *n1; struct net *n2; @@ - n1 != n2 + !net_eq(n1, n2) applied over {include,net,drivers/net}. Signed-off-by: Octavian Purdila <opurdila@ixiacom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-10CAN: use dev_get_by_index_rcustephen hemminger
Use new function to avoid doing read_lock(). Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-08Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/can/usb/ems_usb.c
2009-11-08can: should not use __dev_get_by_index() without locksEric Dumazet
bcm_proc_getifname() is called with RTNL and dev_base_lock not held. It calls __dev_get_by_index() without locks, and this is illegal (might crash) Close the race by holding dev_base_lock and copying dev->name in the protected section. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-05net: pass kern to net_proto_family create functionEric Paris
The generic __sock_create function has a kern argument which allows the security system to make decisions based on if a socket is being created by the kernel or by userspace. This patch passes that flag to the net_proto_family specific create function, so it can do the same thing. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-05net: drop capability from protocol definitionsEric Paris
struct can_proto had a capability field which wasn't ever used. It is dropped entirely. struct inet_protosw had a capability field which can be more clearly expressed in the code by just checking if sock->type = SOCK_RAW. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29net: Cleanup redundant tests on unsignedroel kluin
optlen is unsigned so the `< 0' test is never true. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-12net: Generalize socket rx gap / receive queue overflow cmsgNeil Horman
Create a new socket level option to report number of queue overflows Recently I augmented the AF_PACKET protocol to report the number of frames lost on the socket receive queue between any two enqueued frames. This value was exported via a SOL_PACKET level cmsg. AFter I completed that work it was requested that this feature be generalized so that any datagram oriented socket could make use of this option. As such I've created this patch, It creates a new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue overflowed between any two given frames. It also augments the AF_PACKET protocol to take advantage of this new feature (as it previously did not touch sk->sk_drops, which this patch uses to record the overflow count). Tested successfully by me. Notes: 1) Unlike my previous patch, this patch simply records the sk_drops value, which is not a number of drops between packets, but rather a total number of drops. Deltas must be computed in user space. 2) While this patch currently works with datagram oriented protocols, it will also be accepted by non-datagram oriented protocols. I'm not sure if thats agreeable to everyone, but my argument in favor of doing so is that, for those protocols which aren't applicable to this option, sk_drops will always be zero, and reporting no drops on a receive queue that isn't used for those non-participating protocols seems reasonable to me. This also saves us having to code in a per-protocol opt in mechanism. 3) This applies cleanly to net-next assuming that commit 977750076d98c7ff6cbda51858bb5a5894a9d9ab (my af packet cmsg patch) is reverted Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-07net: mark net_proto_ops as constStephen Hemminger
All usages of structure net_proto_ops should be declared const. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-30net: Make setsockopt() optlen be unsigned.David S. Miller
This provides safety against negative optlen at the type level instead of depending upon (sometimes non-trivial) checks against this sprinkled all over the the place, in each and every implementation. Based upon work done by Arjan van de Ven and feedback from Linus Torvalds. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-15can: fix NOHZ local_softirq_pending 08 warningOliver Hartkopp
When using nanosleep() in an userspace application we get a ratelimit warning NOHZ: local_softirq_pending 08 for 10 times. The echo of CAN frames is done from process context and softirq context only. Therefore the usage of netif_rx() was wrong (for years). This patch replaces netif_rx() with netif_rx_ni() which has to be used from process/softirq context. It also adds a missing comment that can_send() must no be used from hardirq context. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: Urs Thuermann <urs@isnogud.escape.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-30can: use correct NET_RX_ return valuesOliver Hartkopp
Dropped skb's should be documented by an appropriate return value. Use the correct NET_RX_DROP and NET_RX_SUCCESS values for that reason. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-29can: switch to seq_fileAlexey Dobriyan
create_proc_read_entry() is going to be removed soon. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-14can: Use WARN_ONCE() instead of BUG_ON() for sanity check in receive pathOliver Hartkopp
To ensure a proper handling of CAN frames transported in skbuffs some checks need to be performed at receive time. As stated by Michael Olbrich and Luotao Fu BUG_ON() might be to restrictive. This is right as we can just drop the non conform skbuff and the Kernel can continue working. This patch replaces the BUG_ON() with a WARN_ONCE() so that the system remains healthy but we made the problem visible (once). Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: Urs Thuermann <urs@isnogud.escape.de> CC: Michael Olbrich <m.olbrich@pengutronix.de> CC: Luotao Fu <l.fu@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-09can: Fix raw_getname() leakEric Dumazet
raw_getname() can leak 10 bytes of kernel memory to user (two bytes hole between can_family and can_ifindex, 8 bytes at the end of sockaddr_can structure) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-07-15net/can: add module alias to can protocol driversLothar Waßmann
Add appropriate MODULE_ALIAS() to facilitate autoloading of can protocol drivers Signed-off-by: Lothar Wassmann <LW@KARO-electronics.de> Acked-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-07-15net/can bugfix: use after free bug in can protocol driversLothar Waßmann
Fix a use after free bug in can protocol drivers The release functions of the can protocol drivers lack a call to sock_orphan() which leads to referencing freed memory under certain circumstances. This patch fixes a bug reported here: https://lists.berlios.de/pipermail/socketcan-users/2009-July/000985.html Signed-off-by: Lothar Wassmann <LW@KARO-electronics.de> Acked-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-10can: af_can.c use rcu_barrier() on module unload.Jesper Dangaard Brouer
This module uses rcu_call() thus it should use rcu_barrier() on module unload. Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk> Acked-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-04-17can: Network Drop Monitor: Make use of consume_skb() in af_can.cOliver Hartkopp
Since commit ead2ceb0ec9f85cff19c43b5cdb2f8a054484431 ("Network Drop Monitor: Adding kfree_skb_clean for non-drops and modifying end-of-line points for skbs") so called end-of-line points for skb's should use consume_skb() to free the socket buffer. In opposite to consume_skb() the function kfree_skb() is intended to be used for unexpected skb drops e.g. in error conditions that now can trigger the network drop monitor if enabled. This patch moves the skb end-of-line point in af_can.c to use consume_skb(). Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-31proc 2/2: remove struct proc_dir_entry::ownerAlexey Dobriyan
Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy as correctly noted at bug #12454. Someone can lookup entry with NULL ->owner, thus not pinning enything, and release it later resulting in module refcount underflow. We can keep ->owner and supply it at registration time like ->proc_fops and ->data. But this leaves ->owner as easy-manipulative field (just one C assignment) and somebody will forget to unpin previous/pin current module when switching ->owner. ->proc_fops is declared as "const" which should give some thoughts. ->read_proc/->write_proc were just fixed to not require ->owner for protection. rmmod'ed directories will be empty and return "." and ".." -- no harm. And directories with tricky enough readdir and lookup shouldn't be modular. We definitely don't want such modular code. Removing ->owner will also make PDE smaller. So, let's nuke it. Kudos to Jeff Layton for reminding about this, let's say, oversight. http://bugzilla.kernel.org/show_bug.cgi?id=12454 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-02-26can: remove some pointless conditionals before kfree_skb()Wei Yongjun
Remove some pointless conditionals before kfree_skb(). Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-15ip: support for TX timestamps on UDP and RAW socketsPatrick Ohly
Instructions for time stamping outgoing packets are take from the socket layer and later copied into the new skb. Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-01net: replace uses of __constant_{endian}Harvey Harrison
Base versions handle constant folding now. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-14can: fix slowpath issue in hrtimer callback functionOliver Hartkopp
Due to the loopback functionality in can_send() we can not invoke it from hardirq context which was done inside the bcm_tx_timeout_handler() hrtimer callback: [ 700.361154] [<c012228c>] warn_slowpath+0x80/0xb6 [ 700.361163] [<c013d559>] valid_state+0x125/0x136 [ 700.361171] [<c013d858>] mark_lock+0x18e/0x332 [ 700.361180] [<c013e300>] __lock_acquire+0x12e/0xb1e [ 700.361189] [<f8ab5915>] bcm_tx_timeout_handler+0x0/0xbc [can_bcm] [ 700.361198] [<c031e20a>] dev_queue_xmit+0x191/0x479 [ 700.361206] [<c01262a7>] __local_bh_disable+0x2b/0x64 [ 700.361213] [<c031e20a>] dev_queue_xmit+0x191/0x479 [ 700.361225] [<f8aa69a1>] can_send+0xd7/0x11a [can] [ 700.361235] [<f8ab522b>] bcm_can_tx+0x9d/0xd9 [can_bcm] [ 700.361245] [<f8ab597f>] bcm_tx_timeout_handler+0x6a/0xbc [can_bcm] [ 700.361255] [<f8ab5915>] bcm_tx_timeout_handler+0x0/0xbc [can_bcm] [ 700.361263] [<c0134143>] __run_hrtimer+0x5a/0x86 [ 700.361273] [<f8ab5915>] bcm_tx_timeout_handler+0x0/0xbc [can_bcm] [ 700.361282] [<c0134a50>] hrtimer_interrupt+0xb9/0x110 This patch moves the rest of the functionality from the hrtimer callback to the already existing tasklet to fix this slowpath problem. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-06can: omit unneeded skb_clone() callsOliver Hartkopp
The AF_CAN core delivered always cloned sk_buffs to the AF_CAN protocols, although this was _only_ needed by the can-raw protocol. With this (additionally documented) change, the AF_CAN core calls the callback functions of the registered AF_CAN protocols with the original (uncloned) sk_buff pointer and let's the can-raw protocol do the skb_clone() itself which omits all unneeded skb_clone() calls for other AF_CAN protocols. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-04can: update can-bcm for hrtimer hardirq callbacksOliver Hartkopp
Since commit ca109491f612aab5c8152207631c0444f63da97f ("hrtimer: removing all ur callback modes") the hrtimer callbacks are processed only in hardirq context. This patch moves some functionality into tasklets to run in softirq context. Additionally some duplicated code was removed in bcm_rx_thr_flush() and an avoidable memcpy was removed from bcm_rx_handler(). Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-14can: merge error pathsIlpo Järvinen
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-04can: omit received RTR frames for single ID filter listsOliver Hartkopp
Since commit d253eee20195b25e298bf162a6e72f14bf4803e5 the single CAN identifier filter lists handle only non-RTR CAN frames. So we need to omit the check of these filter lists when receiving RTR CAN frames. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-03can: Fix CAN_(EFF|RTR)_FLAG handling in can_filterOliver Hartkopp
Due to a wrong safety check in af_can.c it was not possible to filter for SFF frames with a specific CAN identifier without getting the same selected CAN identifier from a received EFF frame also. This fix has a minimum (but user visible) impact on the CAN filter API and therefore the CAN version is set to a new date. Indeed the 'old' API is still working as-is. But when now setting CAN_(EFF|RTR)_FLAG in can_filter.can_mask you might get less traffic than before - but still the stuff that you expected to get for your defined filter ... Thanks to Kurt Van Dijck for pointing at this issue and for the review. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Acked-by: Kurt Van Dijck <kurt.van.dijck@eia.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-16net: Remove CONFIG_KMOD from net/ (towards removing CONFIG_KMOD entirely)Johannes Berg
Some code here depends on CONFIG_KMOD to not try to load protocol modules or similar, replace by CONFIG_MODULES where more than just request_module depends on CONFIG_KMOD and and also use try_then_request_module in ebtables. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-19netns: Use net_eq() to compare net-namespaces for optimization.YOSHIFUJI Hideaki
Without CONFIG_NET_NS, namespace is always &init_net. Compiler will be able to omit namespace comparisons with this patch. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-05can: add sanity checksOliver Hartkopp
Even though the CAN netlayer only deals with CAN netdevices, the netlayer interface to the userspace and to the device layer should perform some sanity checks. This patch adds several sanity checks that mainly prevent userspace apps to send broken content into the system that may be misinterpreted by some other userspace application. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Acked-by: Andre Naujoks <nautsch@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (32 commits) net: Added ASSERT_RTNL() to dev_open() and dev_close(). can: Fix can_send() handling on dev_queue_xmit() failures netns: Fix arbitrary net_device-s corruptions on net_ns stop. netfilter: Kconfig: default DCCP/SCTP conntrack support to the protocol config values netfilter: nf_conntrack_sip: restrict RTP expect flushing on error to last request macvlan: Fix memleak on device removal/crash on module removal net/ipv4: correct RFC 1122 section reference in comment tcp FRTO: SACK variant is errorneously used with NewReno e1000e: don't return half-read eeprom on error ucc_geth: Don't use RX clock as TX clock. cxgb3: Use CAP_SYS_RAWIO for firmware pcnet32: delete non NAPI code from driver. fs_enet: Fix a memory leak in fs_enet_mdio_probe [netdrvr] eexpress: IPv6 fails - multicast problems 3c59x: use netstats in net_device structure 3c980-TX needs EXTRA_PREAMBLE fix warning in drivers/net/appletalk/cops.c e1000e: Add support for BM PHYs on ICH9 uli526x: fix endianness issues in the setup frame uli526x: initialize the hardware prior to requesting interrupts ...
2008-05-08can: Fix can_send() handling on dev_queue_xmit() failuresOliver Hartkopp
The tx packet counting and the local loopback of CAN frames should only happen in the case that the CAN frame has been enqueued to the netdevice tx queue successfully. Thanks to Andre Naujoks <nautsch@gmail.com> for reporting this issue. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: Urs Thuermann <urs@isnogud.escape.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-03hrtimer: remove duplicate helper functionOliver Hartkopp
The helper function hrtimer_callback_running() is used in kernel/hrtimer.c as well as in the updated net/can/bcm.c which now supports hrtimers. Moving the helper function to hrtimer.h removes the duplicate definition in the C-files. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Cc: David Miller <davem@davemloft.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-27can: Fix copy_from_user() results interpretationSam Ravnborg
Both copy_to_ and _from_user return the number of bytes, that failed to reach their destination, not the 0/-EXXX values. Based on patch from Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-25net: Fix wrong interpretation of some copy_to_user() results.Pavel Emelyanov
I found some places, that erroneously return the value obtained from the copy_to_user() call: if some amount of bytes were not able to get to the user (this is what this one returns) the proper behavior is to return the -EFAULT error, not that number itself. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-15CAN: use hrtimers in can-bcm protocolOliver Hartkopp
Make use of hrtimers to support high resolution capabilities, when provided by the system clocksource. The conversion to hrtimers additionally discovered and solved an unlikely race condition that has been reproduced under (unrealistic) massive receive load, which can only be produced on vcan software devices. [ Fix printf format warnings on 64-bit -DaveM ] Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-26[NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.YOSHIFUJI Hideaki
Introduce per-net_device inlines: dev_net(), dev_net_set(). Without CONFIG_NET_NS, no namespace other than &init_net exists. Let's explicitly define them to help compiler optimizations. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-02-07[CAN]: Minor clean-upsUrs Thuermann
Remove unneeded variable. Rename local variable error to err like in all other places. Some white-space changes. Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-07[CAN]: Move proto_{,un}register() out of spin-locked regionUrs Thuermann
The implementation of proto_register() has changed so that it can now sleep. The call to proto_register() must be moved out of the spin-locked region. Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-07[CAN]: Clean up module auto loadingUrs Thuermann
Remove local char array to construct module name. Don't call request_module() when CONFIG_KMOD is not set. Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[CAN]: Add virtual CAN netdevice driverOliver Hartkopp
This patch adds the virtual CAN bus (vcan) network driver. The vcan device is just a loopback device for CAN frames, no real CAN hardware is involved. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[CAN]: Add broadcast manager (bcm) protocolOliver Hartkopp
This patch adds the CAN broadcast manager (bcm) protocol. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[CAN]: Add raw protocolOliver Hartkopp
This patch adds the CAN raw protocol. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[CAN]: Add PF_CAN core moduleOliver Hartkopp
This patch adds the CAN core functionality but no protocols or drivers. No protocol implementations are included here. They come as separate patches. Protocol numbers are already in include/linux/can.h. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
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