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2020-10-06ethtool: wire up set policies to opsJakub Kicinski14-104/+74
Similarly to get commands wire up the policies of set commands to get parsing by the core and policy dumps. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06ethtool: wire up get policies to opsJakub Kicinski17-107/+90
Wire up policies for get commands in struct nla_policy of the ethtool family. Make use of genetlink code attr validation and parsing, as well as allow dumping policies to user space. For every ETHTOOL_MSG_*_GET: - add 'ethnl_' prefix to policy name - add extern declaration in net/ethtool/netlink.h - wire up the policy & attr in ethtool_genl_ops[]. - remove .request_policy and .max_attr from ethnl_request_ops. Obviously core only records the first "layer" of parsed attrs so we still need to parse the sub-attrs of the nested header attribute. v2: - merge of patches 1 and 2 from v1 - remove stray empty lines in ops - also remove .max_attr Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06ipv4: use dev_sw_netstats_rx_add()Fabian Frederick2-15/+2
use new helper for netstats settings Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06net: openvswitch: use dev_sw_netstats_rx_add()Fabian Frederick1-7/+1
use new helper for netstats settings Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06xfrm: use dev_sw_netstats_rx_add()Fabian Frederick1-8/+1
use new helper for netstats settings Signed-off-by: Fabian Frederick <fabf@skynet.be> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06ipv6: use dev_sw_netstats_rx_add()Fabian Frederick1-7/+1
use new helper for netstats settings Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06ethtool: allow netdev driver to define phy tunablesIgor Russkikh1-13/+24
Define get/set phy tunable callbacks in ethtool ops. This will allow MAC drivers with integrated PHY still to implement these tunables. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Igor Russkikh <irusskikh@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06net: always dump full packets with skb_dumpVladimir Oltean1-5/+1
Currently skb_dump has a restriction to only dump full packet for the first 5 socket buffers, then only headers will be printed. Remove this arbitrary and confusing restriction, which is only documented vaguely ("up to") in the comments above the prototype. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-06mptcp: don't skip needed ackPaolo Abeni1-2/+4
Currently we skip calling tcp_cleanup_rbuf() when packets are moved into the OoO queue or simply dropped. In both cases we still increment tp->copied_seq, and we should ask the TCP stack to check for ack. Fixes: c76c6956566f ("mptcp: call tcp_cleanup_rbuf on subflows") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller47-183/+350
Rejecting non-native endian BTF overlapped with the addition of support for it. The rest were more simple overlapping changes, except the renesas ravb binding update, which had to follow a file move as well as a YAML conversion. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds48-197/+367
Pull networking fixes from David Miller: 1) Make sure SKB control block is in the proper state during IPSEC ESP-in-TCP encapsulation. From Sabrina Dubroca. 2) Various kinds of attributes were not being cloned properly when we build new xfrm_state objects from existing ones. Fix from Antony Antony. 3) Make sure to keep BTF sections, from Tony Ambardar. 4) TX DMA channels need proper locking in lantiq driver, from Hauke Mehrtens. 5) Honour route MTU during forwarding, always. From Maciej Żenczykowski. 6) Fix races in kTLS which can result in crashes, from Rohit Maheshwari. 7) Skip TCP DSACKs with rediculous sequence ranges, from Priyaranjan Jha. 8) Use correct address family in xfrm state lookups, from Herbert Xu. 9) A bridge FDB flush should not clear out user managed fdb entries with the ext_learn flag set, from Nikolay Aleksandrov. 10) Fix nested locking of netdev address lists, from Taehee Yoo. 11) Fix handling of 32-bit DATA_FIN values in mptcp, from Mat Martineau. 12) Fix r8169 data corruptions on RTL8402 chips, from Heiner Kallweit. 13) Don't free command entries in mlx5 while comp handler could still be running, from Eran Ben Elisha. 14) Error flow of request_irq() in mlx5 is busted, due to an off by one we try to free and IRQ never allocated. From Maor Gottlieb. 15) Fix leak when dumping netlink policies, from Johannes Berg. 16) Sendpage cannot be performed when a page is a slab page, or the page count is < 1. Some subsystems such as nvme were doing so. Create a "sendpage_ok()" helper and use it as needed, from Coly Li. 17) Don't leak request socket when using syncookes with mptcp, from Paolo Abeni. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (111 commits) net/core: check length before updating Ethertype in skb_mpls_{push,pop} net: mvneta: fix double free of txq->buf net_sched: check error pointer in tcf_dump_walker() net: team: fix memory leak in __team_options_register net: typhoon: Fix a typo Typoon --> Typhoon net: hinic: fix DEVLINK build errors net: stmmac: Modify configuration method of EEE timers tcp: fix syn cookied MPTCP request socket leak libceph: use sendpage_ok() in ceph_tcp_sendpage() scsi: libiscsi: use sendpage_ok() in iscsi_tcp_segment_map() drbd: code cleanup by using sendpage_ok() to check page for kernel_sendpage() tcp: use sendpage_ok() to detect misused .sendpage nvme-tcp: check page by sendpage_ok() before calling kernel_sendpage() net: add WARN_ONCE in kernel_sendpage() for improper zero-copy send net: introduce helper sendpage_ok() in include/linux/net.h net: usb: pegasus: Proper error handing when setting pegasus' MAC address net: core: document two new elements of struct net_device netlink: fix policy dump leak net/mlx5e: Fix race condition on nhe->n pointer in neigh update net/mlx5e: Fix VLAN create flow ...
2020-10-05net: dsa: propagate switchdev vlan_filtering prepare phase to driversVladimir Oltean2-9/+17
A driver may refuse to enable VLAN filtering for any reason beyond what the DSA framework cares about, such as: - having tc-flower rules that rely on the switch being VLAN-aware - the particular switch does not support VLAN, even if the driver does (the DSA framework just checks for the presence of the .port_vlan_add and .port_vlan_del pointers) - simply not supporting this configuration to be toggled at runtime Currently, when a driver rejects a configuration it cannot support, it does this from the commit phase, which triggers various warnings in switchdev. So propagate the prepare phase to drivers, to give them the ability to refuse invalid configurations cleanly and avoid the warnings. Since we need to modify all function prototypes and check for the prepare phase from within the drivers, take that opportunity and move the existing driver restrictions within the prepare phase where that is possible and easy. Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: Woojung Huh <woojung.huh@microchip.com> Cc: Microchip Linux Driver Support <UNGLinuxDriver@microchip.com> Cc: Sean Wang <sean.wang@mediatek.com> Cc: Landen Chao <Landen.Chao@mediatek.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Vivien Didelot <vivien.didelot@gmail.com> Cc: Jonathan McDowell <noodles@earth.li> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net: openvswitch: Constify static struct genl_small_opsRikard Falkeborn2-2/+2
The only usage of these is to assign their address to the small_ops field in the genl_family struct, which is a const pointer, and applying ARRAY_SIZE() on them. Make them const to allow the compiler to put them in read-only memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04mptcp: Constify mptcp_pm_opsRikard Falkeborn1-1/+1
The only usages of mptcp_pm_ops is to assign its address to the small_ops field of the genl_family struct, which is a const pointer, and applying ARRAY_SIZE() on it. Make it const to allow the compiler to put it in read-only memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net/core: check length before updating Ethertype in skb_mpls_{push,pop}Guillaume Nault1-2/+2
Openvswitch allows to drop a packet's Ethernet header, therefore skb_mpls_push() and skb_mpls_pop() might be called with ethernet=true and mac_len=0. In that case the pointer passed to skb_mod_eth_type() doesn't point to an Ethernet header and the new Ethertype is written at unexpected locations. Fix this by verifying that mac_len is big enough to contain an Ethernet header. Fixes: fa4e0f8855fc ("net/sched: fix corrupted L2 header with MPLS 'push' and 'pop' actions") Signed-off-by: Guillaume Nault <gnault@redhat.com> Acked-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net_sched: check error pointer in tcf_dump_walker()Cong Wang1-0/+2
Although we take RTNL on dump path, it is possible to skip RTNL on insertion path. So the following race condition is possible: rtnl_lock() // no rtnl lock mutex_lock(&idrinfo->lock); // insert ERR_PTR(-EBUSY) mutex_unlock(&idrinfo->lock); tc_dump_action() rtnl_unlock() So we have to skip those temporary -EBUSY entries on dump path too. Reported-and-tested-by: syzbot+b47bc4f247856fb4d9e1@syzkaller.appspotmail.com Fixes: 0fedc63fadf0 ("net_sched: commit action insertions together") Cc: Vlad Buslov <vladbu@mellanox.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net: dsa: Add devlink port regions support to DSAAndrew Lunn1-0/+14
Allow DSA drivers to make use of devlink port regions, via simple wrappers. Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Tested-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net: devlink: Add support for port regionsAndrew Lunn1-26/+224
Allow regions to be registered to a devlink port. The same netlink API is used, but the port index is provided to indicate when a region is a port region as opposed to a device region. Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Tested-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net: dsa: Register devlink ports before calling DSA driver setup()Andrew Lunn1-53/+72
DSA drivers want to create regions on devlink ports as well as the devlink device instance, in order to export registers and other tables per port. To keep all this code together in the drivers, have the devlink ports registered early, so the setup() method can setup both device and port devlink regions. v3: Remove dp->setup Move common code out of switch statement. Fix wrong goto Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Tested-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net: dsa: Make use of devlink port flavour unusedAndrew Lunn1-0/+10
If a port is unused, still create a devlink port for it, but set the flavour to unused. This allows us to attach devlink regions to the port, etc. Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Tested-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04net: devlink: Add unused port flavourAndrew Lunn1-1/+3
Not all ports of a switch need to be used, particularly in embedded systems. Add a port flavour for ports which physically exist in the switch, but are not connected to the front panel etc, and so are unused. By having unused ports present in devlink, it gives a more accurate representation of the hardware. It also allows regions to be associated to such ports, so allowing, for example, to determine unused ports are correctly powered off, or to compare probable reset defaults of unused ports to used ports experiences issues. Actually registering unused ports and setting the flavour to unused is optional. The DSA core will register all such switch ports, but such ports are expected to be limited in number. Bigger ASICs may decide not to list unused ports. v2: Expand the description about why it is useful Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Tested-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller9-56/+207
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next: 1) Rename 'searched' column to 'clashres' in conntrack /proc/ stats to amend a recent patch, from Florian Westphal. 2) Remove unused nft_data_debug(), from YueHaibing. 3) Remove unused definitions in IPVS, also from YueHaibing. 4) Fix user data memleak in tables and objects, this is also amending a recent patch, from Jose M. Guisado. 5) Use nla_memdup() to allocate user data in table and objects, also from Jose M. Guisado 6) User data support for chains, from Jose M. Guisado 7) Remove unused definition in nf_tables_offload, from YueHaibing. 8) Use kvzalloc() in ip_set_alloc(), from Vasily Averin. 9) Fix false positive reported by lockdep in nfnetlink mutexes, from Florian Westphal. 10) Extend fast variant of cmp for neq operation, from Phil Sutter. 11) Implement fast bitwise variant, also from Phil Sutter. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-04netfilter: nf_tables: Implement fast bitwise expressionPhil Sutter2-6/+147
A typical use of bitwise expression is to mask out parts of an IP address when matching on the network part only. Optimize for this common use with a fast variant for NFT_BITWISE_BOOL-type expressions operating on 32bit-sized values. Signed-off-by: Phil Sutter <phil@nwl.cc> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-04netfilter: nf_tables: Enable fast nft_cmp for inverted matchesPhil Sutter2-8/+8
Add a boolean indicating NFT_CMP_NEQ. To include it into the match decision, it is sufficient to XOR it with the data comparison's result. While being at it, store the mask that is calculated during expression init and free the eval routine from having to recalculate it each time. Signed-off-by: Phil Sutter <phil@nwl.cc> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-04netfilter: nfnetlink: place subsys mutexes in distinct lockdep classesFlorian Westphal1-1/+18
From time to time there are lockdep reports similar to this one: WARNING: possible circular locking dependency detected ------------------------------------------------------ 000000004f61aa56 (&table[i].mutex){+.+.}, at: nfnl_lock [nfnetlink] but task is already holding lock: [..] (&net->nft.commit_mutex){+.+.}, at: nf_tables_valid_genid [nf_tables] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&net->nft.commit_mutex){+.+.}: [..] nf_tables_valid_genid+0x18/0x60 [nf_tables] nfnetlink_rcv_batch+0x24c/0x620 [nfnetlink] nfnetlink_rcv+0x110/0x140 [nfnetlink] netlink_unicast+0x12c/0x1e0 [..] sys_sendmsg+0x18/0x40 linux_sparc_syscall+0x34/0x44 -> #0 (&table[i].mutex){+.+.}: [..] nfnl_lock+0x24/0x40 [nfnetlink] ip_set_nfnl_get_byindex+0x19c/0x280 [ip_set] set_match_v1_checkentry+0x14/0xc0 [xt_set] xt_check_match+0x238/0x260 [x_tables] __nft_match_init+0x160/0x180 [nft_compat] [..] sys_sendmsg+0x18/0x40 linux_sparc_syscall+0x34/0x44 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&net->nft.commit_mutex); lock(&table[i].mutex); lock(&net->nft.commit_mutex); lock(&table[i].mutex); Lockdep considers this an ABBA deadlock because the different nfnl subsys mutexes reside in the same lockdep class, but this is a false positive. CPU1 table[i] refers to the nftables subsys mutex, whereas CPU1 locks the ipset subsys mutex. Yi Che reported a similar lockdep splat, this time between ipset and ctnetlink subsys mutexes. Time to place them in distinct classes to avoid these warnings. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-04netfilter: ipset: enable memory accounting for ipset allocationsVasily Averin1-16/+1
Currently netadmin inside non-trusted container can quickly allocate whole node's memory via request of huge ipset hashtable. Other ipset-related memory allocations should be restricted too. v2: fixed typo ALLOC -> ACCOUNT Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-04netfilter: nf_tables_offload: Remove unused macro FLOW_SETUP_BLOCKYueHaibing1-2/+0
commit 9a32669fecfb ("netfilter: nf_tables_offload: support indr block call") left behind this. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-03mptcp: ADD_ADDRs with echo bit are smallerMatthieu Baerts3-6/+8
The MPTCP ADD_ADDR suboption with echo-flag=1 has no HMAC, the size is smaller than the one initially sent without echo-flag=1. We then need to use the correct size everywhere when we need this echo bit. Before this patch, the wrong size was reserved but the correct amount of bytes were written (and read): the remaining bytes contained garbage. Fixes: 6a6c05a8b016 ("mptcp: send out ADD_ADDR with echo flag") Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/95 Reported-and-tested-by: Davide Caratti <dcaratti@redhat.com> Acked-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03net/sched: act_mpls: Add action to push MPLS LSE before Ethernet headerGuillaume Nault1-0/+18
Define the MAC_PUSH action which pushes an MPLS LSE before the mac header (instead of between the mac and the network headers as the plain PUSH action does). The only special case is when the skb has an offloaded VLAN. In that case, it has to be inlined before pushing the MPLS header. Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03net/sched: act_vlan: Add {POP,PUSH}_ETH actionsGuillaume Nault3-18/+117
Implement TCA_VLAN_ACT_POP_ETH and TCA_VLAN_ACT_PUSH_ETH, to respectively pop and push a base Ethernet header at the beginning of a frame. POP_ETH is just a matter of pulling ETH_HLEN bytes. VLAN tags, if any, must be stripped before calling POP_ETH. PUSH_ETH is restricted to skbs with no mac_header, and only the MAC addresses can be configured. The Ethertype is automatically set from skb->protocol. These restrictions ensure that all skb's fields remain consistent, so that this action can't confuse other part of the networking stack (like GSO). Since openvswitch already had these actions, consolidate the code in skbuff.c (like for vlan and mpls push/pop). Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03net/smc: use an array to check fields in system EIDKarsten Graul1-1/+1
The check for old hardware versions that did not have SMCDv2 support was using suspicious pointer magic. Address the fields using an array. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03net/smc: send ISM devices with unique chid in CLC proposalKarsten Graul1-1/+17
When building a CLC proposal message then the list of ISM devices does not need to contain multiple devices that have the same chid value, all these devices use the same function at the end. Improve smc_find_ism_v2_device_clnt() to collect only ISM devices that have unique chid values. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03tcp: account total lost packets properlyYuchung Cheng1-0/+10
The retransmission refactoring patch 686989700cab ("tcp: simplify tcp_mark_skb_lost") does not properly update the total lost packet counter which may break the policer mode in BBR. This patch fixes it. Fixes: 686989700cab ("tcp: simplify tcp_mark_skb_lost") Reported-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03net/iucv: fix indentation in __iucv_message_receive()Julian Wiedmann1-5/+3
smatch complains about net/iucv/iucv.c:1119 __iucv_message_receive() warn: inconsistent indenting While touching this line, also make the return logic consistent and thus get rid of a goto label. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Reviewed-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03net/af_iucv: right-size the uid variable in iucv_sock_bind()Julian Wiedmann1-1/+1
smatch complains about net/iucv/af_iucv.c:624 iucv_sock_bind() error: memcpy() 'sa->siucv_user_id' too small (8 vs 9) Which is absolutely correct - the memcpy() takes 9 bytes (sizeof(uid)) from an 8-byte field (sa->siucv_user_id). Luckily the sockaddr_iucv struct contains more data after the .siucv_user_id field, and we checked the size of the passed data earlier on. So the memcpy() won't accidentally read from an invalid location. Fix the warning by reducing the size of the uid variable to what's actually needed, and thus reducing the amount of copied data. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Reviewed-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03genetlink: allow dumping command-specific policyJakub Kicinski1-5/+36
Right now CTRL_CMD_GETPOLICY can only dump the family-wide policy. Support dumping policy of a specific op. v3: - rebase after per-op policy export and handle that v2: - make cmd U32, just in case. v1: - don't echo op in the output in a naive way, this should make it cleaner to extend the output format for dumping policies for all the commands at once in the future. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Link: https://lore.kernel.org/r/20201001225933.1373426-11-kuba@kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03genetlink: properly support per-op policy dumpingJohannes Berg1-10/+92
Add support for per-op policy dumping. The data is pretty much as before, except that now the assumption that the policy with index 0 is "the" policy no longer holds - you now need to look at the new CTRL_ATTR_OP_POLICY attribute which is a nested attr (indexed by op) containing attributes for do and dump policies. When a single op is requested, the CTRL_ATTR_OP_POLICY will be added in the same way, since do and dump policies may differ. v2: - conditionally advertise per-command policies only if there actually is a policy being used for the do/dump and it's present at all Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03genetlink: factor skb preparation out of ctrl_dumppolicy()Johannes Berg1-6/+19
We'll need this later for the per-op policy index dump. Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03netlink: rework policy dump to support multiple policiesJohannes Berg2-21/+84
Rework the policy dump code a bit to support adding multiple policies to a single dump, in order to e.g. support per-op policies in generic netlink. v2: - move kernel-doc to implementation [Jakub] - squash the first patch to not flip-flop on the prototype [Jakub] - merge netlink_policy_dump_get_policy_idx() with the old get_policy_idx() we already had - rebase without Jakub's patch to have per-op dump Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03netlink: compare policy more accuratelyJohannes Berg1-4/+8
The maxtype is really an integral part of the policy, and while we haven't gotten into a situation yet where this happens, it seems that some developer might eventually have two places pointing to identical policies, with different maxattr to exclude some attrs in one of the places. Even if not, it's really the right thing to compare both since the two data items fundamentally belong together. v2: - also do the proper comparison in get_policy_idx() Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02genetlink: switch control commands to per-op policiesJakub Kicinski1-3/+11
In preparation for adding a new attribute to CTRL_CMD_GETPOLICY split the policies for getpolicy and getfamily apart. This will cause a slight user-visible change in that dumping the policies will switch from per family to per op, but supposedly sniffer-type applications (which are the main use case for policy dumping thus far) should support both, anyway. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02genetlink: use parsed attrs in dumppolicyJakub Kicinski1-7/+2
Attributes are already parsed based on the policy specified in the family and ready-to-use in info->attrs. No need to call genlmsg_parse() again. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02genetlink: bring back per op policyJakub Kicinski1-5/+13
Add policy to the struct genl_ops structure, this time with maxattr, so it can be used properly. Propagate .policy and .maxattr from the family in genl_get_cmd() if needed, this way the rest of the code does not have to worry if the policy is per op or global. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02genetlink: use .start callback for dumppolicyJakub Kicinski1-24/+24
The structure of ctrl_dumppolicy() is clearly split into init and dumping. Move the init to a .start callback for clarity, it's a more idiomatic netlink dump code structure. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02genetlink: add a structure for dump stateJakub Kicinski2-27/+32
Whenever netlink dump uses more than 2 cb->args[] entries code gets hard to read. We're about to add more state to ctrl_dumppolicy() so create a structure. Since the structure is typed and clearly named we can remove the local fam_id variable and use ctx->fam_id directly. v3: - rebase onto explicit free fix v1: - s/nl_policy_dump/netlink_policy_dump_state/ - forward declare struct netlink_policy_dump_state, and move from passing unsigned long to actual pointer type - add build bug on - u16 fam_id - s/args/ctx/ Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02genetlink: move to smaller ops wherever possibleJakub Kicinski22-72/+77
Bulk of the genetlink users can use smaller ops, move them. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02genetlink: add small version of opsJakub Kicinski1-32/+95
We want to add maxattr and policy back to genl_ops, to enable dumping per command policy to user space. This, however, would cause bloat for all the families with global policies. Introduce smaller version of ops (half the size of genl_ops). Translate these smaller ops into a full blown struct before use in the core. v1: - use struct assignment - put a full copy of the op in struct genl_dumpit_info - s/light/small/ Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02devlink: add .trap_group_action_set() callbackIoana Ciornei1-0/+18
Add a new devlink callback, .trap_group_action_set(), which can be used by device drivers which do not support controlling the action (drop, trap) on each trap but rather on the entire group trap. If this new callback is populated, it will take precedence over the .trap_action_set() callback when the user requests a change of all the traps in a group. Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02devlink: add parser error drop packet trapsIoana Ciornei1-0/+17
Add parser error drop packet traps, so that capable device driver could register them with devlink. The new packet trap group holds any drops of packets which were marked by the device as erroneous during header parsing. Add documentation for every added packet trap and packet trap group. Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-02tcp: fix syn cookied MPTCP request socket leakPaolo Abeni1-1/+1
If a syn-cookies request socket don't pass MPTCP-level validation done in syn_recv_sock(), we need to release it immediately, or it will be leaked. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/89 Fixes: 9466a1ccebbe ("mptcp: enable JOIN requests even if cookies are in use") Reported-and-tested-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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