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2018-01-19bpf: add upper complexity limit to verifier logDaniel Borkmann1-1/+2
Given the limit could potentially get further adjustments in the future, add it to the log so it becomes obvious what the current limit is w/o having to check the source first. This may also be helpful for debugging complexity related issues on kernels that backport from upstream. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-19bpf, x86: small optimization in alu ops with immDaniel Borkmann1-5/+30
For the BPF_REG_0 (BPF_REG_A in cBPF, respectively), we can use the short form of the opcode as dst mapping is on eax/rax and thus save a byte per such operation. Added to add/sub/and/or/xor for 32/64 bit when K immediate is used. There may be more such low-hanging fruit to add in future as well. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-19bpf: restrict access to core bpf sysctlsDaniel Borkmann1-3/+43
Given BPF reaches far beyond just networking these days, it was never intended to allow setting and in some cases reading those knobs out of a user namespace root running without CAP_SYS_ADMIN, thus tighten such access. Also the bpf_jit_enable = 2 debugging mode should only be allowed if kptr_restrict is not set since it otherwise can leak addresses to the kernel log. Dump a note to the kernel log that this is for debugging JITs only when enabled. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-19bpf: get rid of pure_initcall dependency to enable jitsDaniel Borkmann13-42/+24
Having a pure_initcall() callback just to permanently enable BPF JITs under CONFIG_BPF_JIT_ALWAYS_ON is unnecessary and could leave a small race window in future where JIT is still disabled on boot. Since we know about the setting at compilation time anyway, just initialize it properly there. Also consolidate all the individual bpf_jit_enable variables into a single one and move them under one location. Moreover, don't allow for setting unspecified garbage values on them. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-19bpf: add couple of test cases for div/mod by zeroDaniel Borkmann1-0/+87
Add couple of missing test cases for eBPF div/mod by zero to the new test_verifier prog runtime feature. Also one for an empty prog and only exit. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-19bpf: add couple of test cases for signed extended immsDaniel Borkmann1-0/+104
Add a couple of test cases for interpreter and JIT that are related to an issue we faced some time ago in Cilium [1], which is fixed in LLVM with commit e53750e1e086 ("bpf: fix bug on silently truncating 64-bit immediate"). Test cases were run-time checking kernel to behave as intended which should also provide some guidance for current or new JITs in case they should trip over this. Added for cBPF and eBPF. [1] https://github.com/cilium/cilium/pull/2162 Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-19bpf: add csum_diff helper to xdp as wellDaniel Borkmann1-0/+2
Useful for porting cls_bpf programs w/o increasing program complexity limits much at the same time, so add the helper to XDP as well. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-19bpf, verifier: detect misconfigured mem, size argument pairDaniel Borkmann1-24/+55
I've seen two patch proposals now for helper additions that used ARG_PTR_TO_MEM or similar in reg_X but no corresponding ARG_CONST_SIZE in reg_X+1. Verifier won't complain in such case, but it will omit verifying the memory passed to the helper thus ending up badly. Detect such buggy helper function signature and bail out during verification rather than finding them through review. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-20samples/bpf: xdp_monitor include cpumap tracepoints in monitoringJesper Dangaard Brouer2-67/+443
The xdp_redirect_cpu sample have some "builtin" monitoring of the tracepoints for xdp_cpumap_*, but it is practical to have an external tool that can monitor these transpoint as an easy way to troubleshoot an application using XDP + cpumap. Specifically I need such external tool when working on Suricata and XDP cpumap redirect. Extend the xdp_monitor tool sample with monitoring of these xdp_cpumap_* tracepoints. Model the output format like xdp_redirect_cpu. Given I needed to handle per CPU decoding for cpumap, this patch also add per CPU info on the existing monitor events. This resembles part of the builtin monitoring output from sample xdp_rxq_info. Thus, also covering part of that sample in an external monitoring tool. Performance wise, the cpumap tracepoints uses bulking, which cause them to have very little overhead. Thus, they are enabled by default. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-19tools/bpf: add a testcase for MAP_GET_NEXT_KEY command of LPM_TRIE mapYonghong Song1-0/+122
A test case is added in tools/testing/selftests/bpf/test_lpm_map.c for MAP_GET_NEXT_KEY command. A four node trie, which is described in kernel/bpf/lpm_trie.c, is built and the MAP_GET_NEXT_KEY results are checked. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-19bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE mapYonghong Song1-2/+93
Current LPM_TRIE map type does not implement MAP_GET_NEXT_KEY command. This command is handy when users want to enumerate keys. Otherwise, a different map which supports key enumeration may be required to store the keys. If the map data is sparse and all map data are to be deleted without closing file descriptor, using MAP_GET_NEXT_KEY to find all keys is much faster than enumerating all key space. This patch implements MAP_GET_NEXT_KEY command for LPM_TRIE map. If user provided key pointer is NULL or the key does not have an exact match in the trie, the first key will be returned. Otherwise, the next key will be returned. In this implemenation, key enumeration follows a postorder traversal of internal trie. More specific keys will be returned first than less specific ones, given a sequence of MAP_GET_NEXT_KEY syscalls. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-19selftests: bpf: update .gitignore with missing generated filesShuah Khan1-0/+7
Update .gitignore with missing generated files. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-19bpftool: recognize BPF_MAP_TYPE_CPUMAP mapsRoman Gushchin1-0/+1
Add BPF_MAP_TYPE_CPUMAP map type to the list of map type recognized by bpftool and define corresponding text representation. Signed-off-by: Roman Gushchin <guro@fb.com> Cc: Quentin Monnet <quentin.monnet@netronome.com> Cc: Jakub Kicinski <jakub.kicinski@netronome.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Acked-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-19net: dsa: mv88e6xxx: Free ATU/VTU irq only when there is chip irqAndrew Lunn1-2/+4
We only register the ATU and VTU irq when we have a chip level IRQ. In the error path, we should only attempt to remove the ATU and VTU irq if we also have a chip level IRQ. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: dsa: mv88e6xxx: Return error from irq_find_mapping()Andrew Lunn2-2/+2
Fix a cut/paste error. When irq_find_mapping() returns an error for the ATU or VTU interrupt, return that error, not the value of chip->device_irq. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: sched: cls_u32: add extack supportAlexander Aring1-14/+44
This patch adds extack support for the u32 classifier as example for delete and init callback. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: sched: cls: add extack support for tcf_change_indevAlexander Aring4-7/+11
This patch adds extack handling for the tcf_change_indev function which is common used by TC classifier implementations. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: sched: cls: add extack support for delete callbackAlexander Aring13-14/+26
This patch adds extack support for classifier delete callback api. This prepares to handle extack support inside each specific classifier implementation. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: sched: cls: add extack support for tcf_exts_validateAlexander Aring13-32/+50
The tcf_exts_validate function calls the act api change callback. For preparing extack support for act api, this patch adds the extack as parameter for this function which is common used in cls implementations. Furthermore the tcf_exts_validate will call action init callback which prepares the TC action subsystem for extack support. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: sched: cls: add extack support for change callbackAlexander Aring13-13/+20
This patch adds extack support for classifier change callback api. This prepares to handle extack support inside each specific classifier implementation. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: sched: cls_api: handle generic cls errorsAlexander Aring1-11/+41
This patch adds extack support for generic cls handling. The extack will be set deeper to each called function which is not part of netdev core api. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net: sched: cls: fix code style issuesAlexander Aring3-6/+7
This patch changes some code style issues pointed out by checkpatch inside the TC cls subsystem. Signed-off-by: Alexander Aring <aring@mojatatu.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19mlxsw: spectrum: Upper-bound supported FW versionYuval Mintz1-19/+11
During initialization the driver checks whether the flashed FW image suits its requirements by checking that it's sufficiently new. However, there's only a weak backward compatibility scheme that is actually guaranteed by the FW, so driver must also upper bound the version to prevent compatibility issues between current driver and some possible future fw. Signed-off-by: Yuval Mintz <yuvalm@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: bpf: disable all ctrl vNIC capabilitiesJakub Kicinski1-1/+1
BPF firmware currently exposes IRQ moderation capability. The driver will make use of it by default, inserting 50 usec delay to every control message exchange. This cuts the number of messages per second we can exchange by almost half. None of the other capabilities make much sense for BPF control vNIC, either. Disable them all. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: allow apps to disable ctrl vNIC capabilitiesJakub Kicinski4-0/+12
Most vNIC capabilities are netdev related. It makes no sense to initialize them and waste FW resources. Some are even counter-productive, like IRQ moderation, which will slow down exchange of control messages. Add to nfp_app a mask of enabled control vNIC capabilities for apps to use. Make flower and BPF enable all capabilities for now. No functional changes. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: split reading capabilities out of nfp_net_init()Jakub Kicinski1-11/+20
nfp_net_init() is a little long and we are about to add more code to reading capabilties. Move the capability reading, parsing and validating out. Only actual initialization will stay in nfp_net_init(). No functional changes. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: read mailbox address from TLV capsJakub Kicinski3-10/+46
Allow specifying alternative vNIC mailbox location in TLV caps. This way we can size the mailbox to the needs and not necessarily waste 512B of ctrl memory space. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: read ME frequency from vNIC ctrl memoryJakub Kicinski5-13/+19
PCIe island clock frequency is used when converting coalescing parameters from usecs to NFP timestamps. Most chips don't run at 1200MHz, allow FW to provide us with the real frequency. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: add TLV capabilities to the BARJakub Kicinski5-3/+186
NFP is entirely programmable, including the PCI data interface. Using a fixed control BAR layout certainly makes implementations easier, but require careful considerations when space is allocated. Once BAR area is allocated to one feature nothing else can use it. Allocating space statically also requires it to be sized upfront, which leads to either unnecessary limitation or wastage. We currently have a 32bit capability word defined which tells drivers which application FW features are supported. Most of the bits are exhausted. The same bits are also reused for enabling specific features. Bulk of capabilities don't have a need for an enable bit, however, leading to confusion and wastage. TLVs seems like a better fit for expressing capabilities of applications running on programmable hardware. This patch leaves the front of the BAR as is, and declares a TLV capability start at offset 0x58. Most of the space up to 0x0d90 is already allocated, but the used space can be wrapped with RESERVED TLVs. E.g.: Address Type Length 0x0058 RESERVED 0xe00 /* Wrap basic structures */ 0x0e5c FEATURE_A 0x004 0x0e64 FEATURE_B 0x004 0x0e6c RESERVED 0x990 /* Wrap qeueue stats */ 0x1800 FEATURE_C 0x100 Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: improve app not found messageJakub Kicinski1-1/+1
When driver app matching loaded FW is not found users are faced with: nfp: failed to find app with ID 0x%02x This message does not properly explain that matching driver code is either not built into the driver or the driver is too old. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: protect each repr pointer individually with RCUJakub Kicinski3-63/+68
Representors are grouped in sets by type. Currently the whole sets are under RCU protection, but individual representor pointers are not. This causes some inconveniences when representors have to be destroyed, because we have to allocate new sets to remove any representors. Protect the individual pointers with RCU. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: add nfp_reprs_get_locked() helperJakub Kicinski3-5/+13
The write side of repr tables is always done under pf->lock. Add a helper to dereference repr table pointers under protection of that lock. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: register devlink after app is createdJakub Kicinski3-36/+29
Devlink used to have two global locks: devlink lock and port lock, our lock ordering looked like this: devlink lock -> driver's pf->lock -> devlink port lock After recent changes port lock was replaced with per-instance lock. Unfortunately, new per-instance lock is taken on most operations now. This means we can only grab the pf->lock from the port split/unsplit ops. Lock ordering looks like this: devlink lock -> driver's pf->lock -> devlink instance lock Since we can't take pf->lock from most devlink ops, make sure nfp_apps are prepared to service them as soon as devlink is registered. Locking the pf must be pushed down after nfp_app_init() callback. The init order looks like this: nfp_app_init devlink_register nfp_app_start netdev/port_register As soon as app_init is done nfp_apps must be ready to service devlink-related callbacks. apps can only register their own devlink objects from nfp_app_start. Fixes: 2406e7e546b2 ("devlink: Add per devlink instance lock") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: release global resources only on the remove pathJakub Kicinski1-23/+13
NFP app is currently shut down as soon as all the vNICs are gone. This means we can't depend on the app existing throughout the lifetime of the device. Free the app only from PCI remove path. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19nfp: core: make scalar CPP helpers fail on short accessesJakub Kicinski4-45/+58
Currently the helpers for accessing 4 or 8 byte values over the CPP bus return the length of IO on success. If the IO was short caller has to deal with error handling. The short IO for 4/8B values is completely impractical. Make the helpers return an error if full access was not possible. Fix the few places which are actually dealing with errors correctly, most call sites already only deal with negative return codes. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19tcp: avoid min RTT bloat by skipping RTT from delayed-ACK in BBRYuchung Cheng3-1/+4
A persistent connection may send tiny amount of data (e.g. health-check) for a long period of time. BBR's windowed min RTT filter may only see RTT samples from delayed ACKs causing BBR to grossly over-estimate the path delay depending how much the ACK was delayed at the receiver. This patch skips RTT samples that are likely coming from delayed ACKs. Note that it is possible the sender never obtains a valid measure to set the min RTT. In this case BBR will continue to set cwnd to initial window which seems fine because the connection is thin stream. Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Priyaranjan Jha <priyarjha@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19tcp: avoid min-RTT overestimation from delayed ACKsYuchung Cheng1-2/+21
This patch avoids having TCP sender or congestion control overestimate the min RTT by orders of magnitude. This happens when all the samples in the windowed filter are one-packet transfer like small request and health-check like chit-chat, which is farily common for applications using persistent connections. This patch tries to conservatively labels and skip RTT samples obtained from this type of workload. Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19tipc: fix race between poll() and setsockopt()Jon Maloy3-17/+13
Letting tipc_poll() dereference a socket's pointer to struct tipc_group entails a race risk, as the group item may be deleted in a concurrent tipc_sk_join() or tipc_sk_leave() thread. We now move the 'open' flag in struct tipc_group to struct tipc_sock, and let the former retain only a pointer to the moved field. This will eliminate the race risk. Reported-by: syzbot+799dafde0286795858ac@syzkaller.appspotmail.com Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19l2tp: remove switch block in l2tp_nl_cmd_session_create()Lorenzo Bianconi1-21/+0
Remove the switch block in l2tp_nl_cmd_session_create() that checks pseudowire-specific parameters since just L2TP_PWTYPE_ETH and L2TP_PWTYPE_PPP are currently supported and no actual checks are performed. Moreover the L2TP_PWTYPE_IP/default case presents a harmless issue in error handling (break instead of goto out_tunnel) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Acked-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19cxgb4: IPv6 filter takes 2 tidsGanesh Goudar1-33/+80
on T6, IPv6 filter would occupy 2 tids instead of 4. Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19l2tp: mark L2TP_ATTR_L2SPEC_LEN as not usedLorenzo Bianconi1-1/+1
Reviewed-by: Guillaume Nault <g.nault@alphalink.fr> Tested-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19l2tp: remove l2specific_len configurable parameterLorenzo Bianconi4-8/+1
Remove l2specific_len configuration parameter since now L2-Specific Sublayer length is computed according to l2specific_type provided by userspace. Reviewed-by: Guillaume Nault <g.nault@alphalink.fr> Tested-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19l2tp: remove l2specific_len dependency in l2tp_coreLorenzo Bianconi2-18/+27
Remove l2specific_len dependency while building l2tpv3 header or parsing the received frame since default L2-Specific Sublayer is always four bytes long and we don't need to rely on a user supplied value. Moreover in l2tp netlink code there are no sanity checks to enforce the relation between l2specific_len and l2specific_type, so sending a malformed netlink message is possible to set l2specific_type to L2TP_L2SPECTYPE_DEFAULT (or even L2TP_L2SPECTYPE_NONE) and set l2specific_len to a value greater than 4 leaking memory on the wire and sending corrupted frames. Reviewed-by: Guillaume Nault <g.nault@alphalink.fr> Tested-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19l2tp: double-check l2specific_type provided by userspaceLorenzo Bianconi1-2/+9
Add sanity check on l2specific_type provided by userspace in l2tp_nl_cmd_session_create() since just L2TP_L2SPECTYPE_DEFAULT and L2TP_L2SPECTYPE_NONE are currently supported. Moreover explicitly set l2specific_type to L2TP_L2SPECTYPE_DEFAULT only if the userspace does not provide a value for it Reviewed-by: Guillaume Nault <g.nault@alphalink.fr> Tested-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19cxgb4: use zlib deflate to compress firmware dumpRahul Lakkireddy7-3/+169
Use zlib deflate to compress firmware dump. Collect and compress as much firmware dump as possible into a 32 MB buffer. Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com> Signed-off-by: Vishal Kulkarni <vishal@chelsio.com> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19cxgb4: update dump collection logic to use compressionRahul Lakkireddy6-147/+207
Update firmware dump collection logic to use compression when available. Let collection logic attempt to do compression, instead of returning out of memory early. Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com> Signed-off-by: Vishal Kulkarni <vishal@chelsio.com> Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19net/dim: Fix fixpoint divide exception in net_dim_stats_compareTalat Batheesh1-0/+7
Helmut reported a bug about devision by zero while running traffic and doing physical cable pull test. When the cable unplugged the ppms become zero, so when dividing the current ppms by the previous ppms in the next dim iteration there is devision by zero. This patch prevent this division for both ppms and epms. Fixes: c3164d2fc48f ("net/mlx5e: Added BW check for DIM decision mechanism") Fixes: 4c4dbb4a7363 ("net/mlx5e: Move dynamic interrupt coalescing code to include/linux") Reported-by: Helmut Grauer <helmut.grauer@de.ibm.com> Signed-off-by: Talat Batheesh <talatb@mellanox.com> Signed-off-by: Tal Gilboa <talgi@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19devlink: Make some functions staticWei Yongjun1-2/+3
Fixes the following sparse warnings: net/core/devlink.c:2297:25: warning: symbol 'devlink_resource_find' was not declared. Should it be static? net/core/devlink.c:2322:6: warning: symbol 'devlink_resource_validate_children' was not declared. Should it be static? Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19mlxsw: spectrum: Make function mlxsw_sp_kvdl_part_occ() staticWei Yongjun1-1/+1
Fixes the following sparse warning: drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c:289:5: warning: symbol 'mlxsw_sp_kvdl_part_occ' was not declared. Should it be static? Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Arkadi Sharshevsky <arkadis@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19forcedeth: remove unused variableZhu Yanjun1-5/+3
The variable miistat is not used. So it is removed. CC: Srinivas Eeda <srinivas.eeda@oracle.com> CC: Joe Jin <joe.jin@oracle.com> CC: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>