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2017-10-22drivers, net, mlx4: convert mlx4_qp.refcount from atomic_t to refcount_tElena Reshetova2-5/+5
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable mlx4_qp.refcount is used as pure reference counter. Convert it to refcount_t and fix up the operations. Suggested-by: Kees Cook <keescook@chromium.org> Reviewed-by: David Windsor <dwindsor@gmail.com> Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22drivers, net, mlx4: convert mlx4_cq.refcount from atomic_t to refcount_tElena Reshetova2-6/+6
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable mlx4_cq.refcount is used as pure reference counter. Convert it to refcount_t and fix up the operations. Suggested-by: Kees Cook <keescook@chromium.org> Reviewed-by: David Windsor <dwindsor@gmail.com> Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22drivers, net, ethernet: convert mtk_eth.dma_refcnt from atomic_t to refcount_tElena Reshetova2-4/+8
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable mtk_eth.dma_refcnt is used as pure reference counter. Convert it to refcount_t and fix up the operations. Suggested-by: Kees Cook <keescook@chromium.org> Reviewed-by: David Windsor <dwindsor@gmail.com> Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22drivers, net, ethernet: convert clip_entry.refcnt from atomic_t to refcount_tElena Reshetova2-8/+9
atomic_t variables are currently used to implement reference counters with the following properties: - counter is initialized to 1 using atomic_set() - a resource is freed upon counter reaching zero - once counter reaches zero, its further increments aren't allowed - counter schema uses basic atomic operations (set, inc, inc_not_zero, dec_and_test, etc.) Such atomic variables should be converted to a newly provided refcount_t type and API that prevents accidental counter overflows and underflows. This is important since overflows and underflows can lead to use-after-free situation and be exploitable. The variable clip_entry.refcnt is used as pure reference counter. Convert it to refcount_t and fix up the operations. Suggested-by: Kees Cook <keescook@chromium.org> Reviewed-by: David Windsor <dwindsor@gmail.com> Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22Merge branch 'hns3-loopback-selftest'David S. Miller4-5/+343
Yunsheng Lin says: ==================== Add mac loopback selftest support in hns3 driver This patchset refactors the skb receiving and transmitting function before adding mac loopback selftest support in hns3 driver. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22net: hns3: Add mac loopback selftest support in hns3 driverYunsheng Lin2-0/+327
This patch adds mac loopback selftest support for ethtool cmd by checking if a transmitted packet can be received correctly when mac loopback is enabled. Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22net: hns3: Refactor the skb receiving and transmitting functionYunsheng Lin2-5/+16
This patch refactors the skb receiving and transmitting functions and export them in order to support the ethtool's mac loopback selftest. Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22Merge branch 'bpftool-add-a-version-command-and-fix-several-items'David S. Miller6-30/+56
Jakub Kicinski says: ==================== tools: bpftool: add a "version" command, and fix several items Quentin says: The first seven patches of this series bring several minor fixes to bpftool. Please see individual commit logs for details. Last patch adds a "version" commands to bpftool, which is in fact the version of the kernel from which it was compiled. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: add a command to display bpftool versionQuentin Monnet2-1/+15
This command can be used to print the version of the tool, which is in fact the version from Linux taken from usr/include/linux/version.h. Example usage: $ bpftool version bpftool v4.14.0 Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: show that `opcodes` or `file FILE` should be exclusiveQuentin Monnet2-6/+6
For the `bpftool prog dump { jited | xlated } ...` command, adding `opcodes` keyword (to request opcodes to be printed) will have no effect if `file FILE` (to write binary output to FILE) is provided. The manual page and the help message to be displayed in the terminal should reflect that, and indicate that these options should be mutually exclusive. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: print all relevant byte opcodes for "load double word"Quentin Monnet1-3/+12
The eBPF instruction permitting to load double words (8 bytes) into a register need 8-byte long "immediate" field, and thus occupy twice the space of other instructions. bpftool was aware of this and would increment the instruction counter only once on meeting such instruction, but it would only print the first four bytes of the immediate value to load. Make it able to dump the whole 16 byte-long double instruction instead (as would `llvm-objdump -d <program>`). Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: print only one error message on byte parsing failureQuentin Monnet1-1/+1
Make error messages more consistent. Specifically, when bpftool fails at parsing map key bytes, make it print a single error message to stderr and return from the function, instead of (always) printing a second error message afterwards. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: add `bpftool prog help` as real command i.r.t exit codeQuentin Monnet1-0/+1
Make error messages and return codes more consistent. Specifically, make `bpftool prog help` a real command, instead of printing usage by default for a non-recognized "help" command. Output is the same, but this makes bpftool return with a success value instead of an error. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: use err() instead of info() if there are too many insnsQuentin Monnet1-1/+1
Make error messages and return codes more consistent. Specifically, replace the use of info() macro with err() when too many eBPF instructions are received to be dumped, given that bpftool returns with a non-null exit value in that case. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: fix return value when all eBPF programs have been shownQuentin Monnet1-1/+3
Change the program to have a more consistent return code. Specifically, do not make bpftool return an error code simply because it reaches the end of the list of the eBPF programs to show. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22tools: bpftool: add pointer to file argument to print_hex()Quentin Monnet4-17/+17
Make print_hex() able to print to any file instead of standard output only, and rename it to fprint_hex(). The function can now be called with the info() macro, for example, without splitting the output between standard and error outputs. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22net: sched: mark expected switch fall-throughsGustavo A. R. Silva10-0/+10
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22net: rose: mark expected switch fall-throughsGustavo A. R. Silva2-0/+3
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22openvswitch: conntrack: mark expected switch fall-throughGustavo A. R. Silva1-0/+1
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Notice that in this particular case I placed a "fall through" comment on its own line, which is what GCC is expecting to find. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22net: netrom: nr_in: mark expected switch fall-throughGustavo A. R. Silva1-1/+1
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21bnxt: Move generic devlink code to new fileSteve Lin6-85/+112
Moving generic devlink code (registration) out of VF-R code into new bnxt_devlink file, in preparation for future work to add additional devlink functionality to bnxt. Signed-off-by: Steve Lin <steven.lin1@broadcom.com> Acked-by: Andy Gospodarek <gospo@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21tipc: fix broken tipc_poll() functionJon Maloy1-3/+2
In commit ae236fb208a6 ("tipc: receive group membership events via member socket") we broke the tipc_poll() function by checking the state of the receive queue before the call to poll_sock_wait(), while relying that state afterwards, when it might have changed. We restore this in this commit. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21Merge branch ↵David S. Miller22-227/+849
'net-sched-convert-cls-ndo_setup_tc-offload-calls-to-per-block-callbacks' Jiri Pirko says: ==================== net: sched: convert cls ndo_setup_tc offload calls to per-block callbacks This patchset is a bit bigger, but most of the patches are doing the same changes in multiple classifiers and drivers. I could do some squashes, but I think it is better split. This is another dependency on the way to shared block implementation. The goal is to remove use of tp->q in classifiers code. Also, this provides drivers possibility to track binding of blocks to qdiscs. Legacy drivers which do not support shared block offloading. register one callback per binding. That maintains the current functionality we have with ndo_setup_tc. Drivers which support block sharing offload register one callback per block which safes overhead. Patches 1-4 introduce the binding notifications and per-block callbacks Patches 5-8 add block callbacks calls to classifiers Patches 9-17 do convert from ndo_setup_tc calls to block callbacks for classifier offloads in drivers Patches 18-20 do cleanup v1->v2: - patch1: - move new enum value to the end ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: remove unused is_classid_clsact_ingress/egress helpersJiri Pirko1-13/+0
These helpers are no longer in use by drivers, so remove them. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: remove unused classid field from tc_cls_common_offloadJiri Pirko1-2/+0
It is no longer used by the drivers, so remove it. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: avoid ndo_setup_tc calls for TC_SETUP_CLS*Jiri Pirko14-103/+0
All drivers are converted to use block callbacks for TC_SETUP_CLS*. So it is now safe to remove the calls to ndo_setup_tc from cls_* Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21dsa: Convert ndo_setup_tc offloads to block callbacksJiri Pirko1-11/+53
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for matchall offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21nfp: bpf: Convert ndo_setup_tc offloads to block callbacksJiri Pirko1-9/+45
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for bpf offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21nfp: flower: Convert ndo_setup_tc offloads to block callbacksJiri Pirko1-8/+48
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for flower offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21mlx5e_rep: Convert ndo_setup_tc offloads to block callbacksJiri Pirko1-6/+38
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for flower offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21ixgbe: Convert ndo_setup_tc offloads to block callbacksJiri Pirko1-6/+39
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for u32 offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21cxgb4: Convert ndo_setup_tc offloads to block callbacksJiri Pirko1-6/+39
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for flower and u32 offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21bnxt: Convert ndo_setup_tc offloads to block callbacksJiri Pirko3-10/+73
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for flower offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21mlx5e: Convert ndo_setup_tc offloads to block callbacksJiri Pirko3-22/+51
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for flower offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21mlxsw: spectrum: Convert ndo_setup_tc offloads to block callbacksJiri Pirko1-22/+60
Benefit from the newly introduced block callback infrastructure and convert ndo_setup_tc calls for matchall and flower offloads to block callbacks. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: cls_bpf: call block callbacks for offloadJiri Pirko1-8/+32
Use the newly introduced callbacks infrastructure and call block callbacks alongside with the existing per-netdev ndo_setup_tc. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: cls_u32: call block callbacks for offloadJiri Pirko1-20/+52
Use the newly introduced callbacks infrastructure and call block callbacks alongside with the existing per-netdev ndo_setup_tc. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: cls_u32: swap u32_remove_hw_knode and u32_remove_hw_hnodeJiri Pirko1-8/+8
Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: cls_matchall: call block callbacks for offloadJiri Pirko1-27/+45
Use the newly introduced callbacks infrastructure and call block callbacks alongside with the existing per-netdev ndo_setup_tc. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: use tc_setup_cb_call to call per-block callbacksJiri Pirko3-8/+26
Extend the tc_setup_cb_call entrypoint function originally used only for action egress devices callbacks to call per-block callbacks as well. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: introduce per-block callbacksJiri Pirko3-0/+187
Introduce infrastructure that allows drivers to register callbacks that are called whenever tc would offload inserted rule for a specific block. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: use extended variants of block_get/put in ingress and clsact qdiscsJiri Pirko2-7/+31
Use previously introduced extended variants of block get and put functions. This allows to specify a binder types specific to clsact ingress/egress which is useful for drivers to distinguish who actually got the block. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21net: sched: add block bind/unbind notif. and extended block_get/putJiri Pirko3-3/+94
Introduce new type of ndo_setup_tc message to propage binding/unbinding of a block to driver. Call this ndo whenever qdisc gets/puts a block. Alongside with this, there's need to propagate binder type from qdisc code down to the notifier. So introduce extended variants of block_get/put in order to pass this info. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21ipv6: let trace_fib6_table_lookup() dereference the fib tablePaolo Abeni2-9/+9
The perf traces for ipv6 routing code show a relevant cost around trace_fib6_table_lookup(), even if no trace is enabled. This is due to the fib6_table de-referencing currently performed by the caller. Let's the tracing code pay this overhead, passing to the trace helper the table pointer. This gives small but measurable performance improvement under UDP flood. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Acked-by: David Ahern <dsa@cumulusnetworks.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21Merge branch 'for-upstream' of ↵David S. Miller20-333/+487
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next Johan Hedberg says: ==================== pull request: bluetooth-next 2017-10-19 Here's the first bluetooth-next pull request targeting the 4.15 kernel release. - Multiple fixes & improvements to the hci_bcm driver - DT improvements, e.g. new local-bd-address property - Fixes & improvements to ECDH usage. Private key is now generated by the crypto subsystem. - gcc-4.9 warning fixes Please let me know if there are any issues pulling. Thanks. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21ipv4: ipv4_default_advmss() should use route mtuEric Dumazet1-1/+1
ipv4_default_advmss() incorrectly uses the device MTU instead of the route provided one. IPv6 has the proper behavior, lets harmonize the two protocols. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21Merge branch 'ieee802154-for-davem-2017-10-18' of ↵David S. Miller2-8/+6
git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan-next Stefan Schmidt says: ==================== pull-request: ieee802154 2017-10-18 Please find below a pull request from the ieee802154 subsystem for net-next. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21spectrum: Convert fib event handlers to use container_of on info argDavid Ahern1-6/+23
Use container_of to convert the generic fib_notifier_info into the event specific data structure. Signed-off-by: David Ahern <dsahern@gmail.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21tcp: fix tcp_send_syn_data()Eric Dumazet1-0/+1
syn_data was allocated by sk_stream_alloc_skb(), meaning its destructor and _skb_refdst fields are mangled. We need to call tcp_skb_tsorted_anchor_cleanup() before calling kfree_skb() or kernel crashes. Bug was reported by syzkaller bot. Fixes: e2080072ed2d ("tcp: new list for sent but unacked skbs for RACK recovery") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-21Merge branch 'ipv6-fixes-for-RTF_CACHE-entries'David S. Miller1-2/+14
Paolo Abeni says: ==================== ipv6: fixes for RTF_CACHE entries This series addresses 2 different but related issues with RTF_CACHE introduced by the recent refactory. patch 1 restore the gc timer for such routes patch 2 removes the aged out dst from the fib tree, properly coping with pMTU routes v1 -> v2: - dropped the for ip route show cache - avoid touching dst.obsolete when the dst is aged out v2 -> v3: - take care of pMTU exceptions ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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