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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /net/sched/cls_fw.c | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski:
"Core:
- Add dedicated kmem_cache for typical/small skb->head, avoid having
to access struct page at kfree time, and improve memory use.
- Introduce sysctl to set default RPS configuration for new netdevs.
- Define Netlink protocol specification format which can be used to
describe messages used by each family and auto-generate parsers.
Add tools for generating kernel data structures and uAPI headers.
- Expose all net/core sysctls inside netns.
- Remove 4s sleep in netpoll if carrier is instantly detected on
boot.
- Add configurable limit of MDB entries per port, and port-vlan.
- Continue populating drop reasons throughout the stack.
- Retire a handful of legacy Qdiscs and classifiers.
Protocols:
- Support IPv4 big TCP (TSO frames larger than 64kB).
- Add IP_LOCAL_PORT_RANGE socket option, to control local port range
on socket by socket basis.
- Track and report in procfs number of MPTCP sockets used.
- Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
manager.
- IPv6: don't check net.ipv6.route.max_size and rely on garbage
collection to free memory (similarly to IPv4).
- Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).
- ICMP: add per-rate limit counters.
- Add support for user scanning requests in ieee802154.
- Remove static WEP support.
- Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
reporting.
- WiFi 7 EHT channel puncturing support (client & AP).
BPF:
- Add a rbtree data structure following the "next-gen data structure"
precedent set by recently added linked list, that is, by using
kfunc + kptr instead of adding a new BPF map type.
- Expose XDP hints via kfuncs with initial support for RX hash and
timestamp metadata.
- Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
better support decap on GRE tunnel devices not operating in collect
metadata.
- Improve x86 JIT's codegen for PROBE_MEM runtime error checks.
- Remove the need for trace_printk_lock for bpf_trace_printk and
bpf_trace_vprintk helpers.
- Extend libbpf's bpf_tracing.h support for tracing arguments of
kprobes/uprobes and syscall as a special case.
- Significantly reduce the search time for module symbols by
livepatch and BPF.
- Enable cpumasks to be used as kptrs, which is useful for tracing
programs tracking which tasks end up running on which CPUs in
different time intervals.
- Add support for BPF trampoline on s390x and riscv64.
- Add capability to export the XDP features supported by the NIC.
- Add __bpf_kfunc tag for marking kernel functions as kfuncs.
- Add cgroup.memory=nobpf kernel parameter option to disable BPF
memory accounting for container environments.
Netfilter:
- Remove the CLUSTERIP target. It has been marked as obsolete for
years, and we still have WARN splats wrt races of the out-of-band
/proc interface installed by this target.
- Add 'destroy' commands to nf_tables. They are identical to the
existing 'delete' commands, but do not return an error if the
referenced object (set, chain, rule...) did not exist.
Driver API:
- Improve cpumask_local_spread() locality to help NICs set the right
IRQ affinity on AMD platforms.
- Separate C22 and C45 MDIO bus transactions more clearly.
- Introduce new DCB table to control DSCP rewrite on egress.
- Support configuration of Physical Layer Collision Avoidance (PLCA)
Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
shared medium Ethernet.
- Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
preemption of low priority frames by high priority frames.
- Add support for controlling MACSec offload using netlink SET.
- Rework devlink instance refcounts to allow registration and
de-registration under the instance lock. Split the code into
multiple files, drop some of the unnecessarily granular locks and
factor out common parts of netlink operation handling.
- Add TX frame aggregation parameters (for USB drivers).
- Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
messages with notifications for debug.
- Allow offloading of UDP NEW connections via act_ct.
- Add support for per action HW stats in TC.
- Support hardware miss to TC action (continue processing in SW from
a specific point in the action chain).
- Warn if old Wireless Extension user space interface is used with
modern cfg80211/mac80211 drivers. Do not support Wireless
Extensions for Wi-Fi 7 devices at all. Everyone should switch to
using nl80211 interface instead.
- Improve the CAN bit timing configuration. Use extack to return
error messages directly to user space, update the SJW handling,
including the definition of a new default value that will benefit
CAN-FD controllers, by increasing their oscillator tolerance.
New hardware / drivers:
- Ethernet:
- nVidia BlueField-3 support (control traffic driver)
- Ethernet support for imx93 SoCs
- Motorcomm yt8531 gigabit Ethernet PHY
- onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
- Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
- Amlogic gxl MDIO mux
- WiFi:
- RealTek RTL8188EU (rtl8xxxu)
- Qualcomm Wi-Fi 7 devices (ath12k)
- CAN:
- Renesas R-Car V4H
Drivers:
- Bluetooth:
- Set Per Platform Antenna Gain (PPAG) for Intel controllers.
- Ethernet NICs:
- Intel (1G, igc):
- support TSN / Qbv / packet scheduling features of i226 model
- Intel (100G, ice):
- use GNSS subsystem instead of TTY
- multi-buffer XDP support
- extend support for GPIO pins to E823 devices
- nVidia/Mellanox:
- update the shared buffer configuration on PFC commands
- implement PTP adjphase function for HW offset control
- TC support for Geneve and GRE with VF tunnel offload
- more efficient crypto key management method
- multi-port eswitch support
- Netronome/Corigine:
- add DCB IEEE support
- support IPsec offloading for NFP3800
- Freescale/NXP (enetc):
- support XDP_REDIRECT for XDP non-linear buffers
- improve reconfig, avoid link flap and waiting for idle
- support MAC Merge layer
- Other NICs:
- sfc/ef100: add basic devlink support for ef100
- ionic: rx_push mode operation (writing descriptors via MMIO)
- bnxt: use the auxiliary bus abstraction for RDMA
- r8169: disable ASPM and reset bus in case of tx timeout
- cpsw: support QSGMII mode for J721e CPSW9G
- cpts: support pulse-per-second output
- ngbe: add an mdio bus driver
- usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
- r8152: handle devices with FW with NCM support
- amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
- virtio-net: support multi buffer XDP
- virtio/vsock: replace virtio_vsock_pkt with sk_buff
- tsnep: XDP support
- Ethernet high-speed switches:
- nVidia/Mellanox (mlxsw):
- add support for latency TLV (in FW control messages)
- Microchip (sparx5):
- separate explicit and implicit traffic forwarding rules, make
the implicit rules always active
- add support for egress DSCP rewrite
- IS0 VCAP support (Ingress Classification)
- IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
etc.)
- ES2 VCAP support (Egress Access Control)
- support for Per-Stream Filtering and Policing (802.1Q,
8.6.5.1)
- Ethernet embedded switches:
- Marvell (mv88e6xxx):
- add MAB (port auth) offload support
- enable PTP receive for mv88e6390
- NXP (ocelot):
- support MAC Merge layer
- support for the the vsc7512 internal copper phys
- Microchip:
- lan9303: convert to PHYLINK
- lan966x: support TC flower filter statistics
- lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
- lan937x: support Credit Based Shaper configuration
- ksz9477: support Energy Efficient Ethernet
- other:
- qca8k: convert to regmap read/write API, use bulk operations
- rswitch: Improve TX timestamp accuracy
- Intel WiFi (iwlwifi):
- EHT (Wi-Fi 7) rate reporting
- STEP equalizer support: transfer some STEP (connection to radio
on platforms with integrated wifi) related parameters from the
BIOS to the firmware.
- Qualcomm 802.11ax WiFi (ath11k):
- IPQ5018 support
- Fine Timing Measurement (FTM) responder role support
- channel 177 support
- MediaTek WiFi (mt76):
- per-PHY LED support
- mt7996: EHT (Wi-Fi 7) support
- Wireless Ethernet Dispatch (WED) reset support
- switch to using page pool allocator
- RealTek WiFi (rtw89):
- support new version of Bluetooth co-existance
- Mobile:
- rmnet: support TX aggregation"
* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
page_pool: add a comment explaining the fragment counter usage
net: ethtool: fix __ethtool_dev_mm_supported() implementation
ethtool: pse-pd: Fix double word in comments
xsk: add linux/vmalloc.h to xsk.c
sefltests: netdevsim: wait for devlink instance after netns removal
selftest: fib_tests: Always cleanup before exit
net/mlx5e: Align IPsec ASO result memory to be as required by hardware
net/mlx5e: TC, Set CT miss to the specific ct action instance
net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
net/mlx5: Refactor tc miss handling to a single function
net/mlx5: Kconfig: Make tc offload depend on tc skb extension
net/sched: flower: Support hardware miss to tc action
net/sched: flower: Move filter handle initialization earlier
net/sched: cls_api: Support hardware miss to tc action
net/sched: Rename user cookie and act cookie
sfc: fix builds without CONFIG_RTC_LIB
sfc: clean up some inconsistent indentings
net/mlx4_en: Introduce flexible array to silence overflow warning
net: lan966x: Fix possible deadlock inside PTP
net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
...
Diffstat (limited to '')
-rw-r--r-- | net/sched/cls_fw.c | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c new file mode 100644 index 000000000..ae9439a6c --- /dev/null +++ b/net/sched/cls_fw.c @@ -0,0 +1,450 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class. + * + * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> + * + * Changes: + * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one + * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel). + * Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/skbuff.h> +#include <net/netlink.h> +#include <net/act_api.h> +#include <net/pkt_cls.h> +#include <net/sch_generic.h> +#include <net/tc_wrapper.h> + +#define HTSIZE 256 + +struct fw_head { + u32 mask; + struct fw_filter __rcu *ht[HTSIZE]; + struct rcu_head rcu; +}; + +struct fw_filter { + struct fw_filter __rcu *next; + u32 id; + struct tcf_result res; + int ifindex; + struct tcf_exts exts; + struct tcf_proto *tp; + struct rcu_work rwork; +}; + +static u32 fw_hash(u32 handle) +{ + handle ^= (handle >> 16); + handle ^= (handle >> 8); + return handle % HTSIZE; +} + +TC_INDIRECT_SCOPE int fw_classify(struct sk_buff *skb, + const struct tcf_proto *tp, + struct tcf_result *res) +{ + struct fw_head *head = rcu_dereference_bh(tp->root); + struct fw_filter *f; + int r; + u32 id = skb->mark; + + if (head != NULL) { + id &= head->mask; + + for (f = rcu_dereference_bh(head->ht[fw_hash(id)]); f; + f = rcu_dereference_bh(f->next)) { + if (f->id == id) { + *res = f->res; + if (!tcf_match_indev(skb, f->ifindex)) + continue; + r = tcf_exts_exec(skb, &f->exts, res); + if (r < 0) + continue; + + return r; + } + } + } else { + struct Qdisc *q = tcf_block_q(tp->chain->block); + + /* Old method: classify the packet using its skb mark. */ + if (id && (TC_H_MAJ(id) == 0 || + !(TC_H_MAJ(id ^ q->handle)))) { + res->classid = id; + res->class = 0; + return 0; + } + } + + return -1; +} + +static void *fw_get(struct tcf_proto *tp, u32 handle) +{ + struct fw_head *head = rtnl_dereference(tp->root); + struct fw_filter *f; + + if (head == NULL) + return NULL; + + f = rtnl_dereference(head->ht[fw_hash(handle)]); + for (; f; f = rtnl_dereference(f->next)) { + if (f->id == handle) + return f; + } + return NULL; +} + +static int fw_init(struct tcf_proto *tp) +{ + /* We don't allocate fw_head here, because in the old method + * we don't need it at all. + */ + return 0; +} + +static void __fw_delete_filter(struct fw_filter *f) +{ + tcf_exts_destroy(&f->exts); + tcf_exts_put_net(&f->exts); + kfree(f); +} + +static void fw_delete_filter_work(struct work_struct *work) +{ + struct fw_filter *f = container_of(to_rcu_work(work), + struct fw_filter, + rwork); + rtnl_lock(); + __fw_delete_filter(f); + rtnl_unlock(); +} + +static void fw_destroy(struct tcf_proto *tp, bool rtnl_held, + struct netlink_ext_ack *extack) +{ + struct fw_head *head = rtnl_dereference(tp->root); + struct fw_filter *f; + int h; + + if (head == NULL) + return; + + for (h = 0; h < HTSIZE; h++) { + while ((f = rtnl_dereference(head->ht[h])) != NULL) { + RCU_INIT_POINTER(head->ht[h], + rtnl_dereference(f->next)); + tcf_unbind_filter(tp, &f->res); + if (tcf_exts_get_net(&f->exts)) + tcf_queue_work(&f->rwork, fw_delete_filter_work); + else + __fw_delete_filter(f); + } + } + kfree_rcu(head, rcu); +} + +static int fw_delete(struct tcf_proto *tp, void *arg, bool *last, + bool rtnl_held, struct netlink_ext_ack *extack) +{ + struct fw_head *head = rtnl_dereference(tp->root); + struct fw_filter *f = arg; + struct fw_filter __rcu **fp; + struct fw_filter *pfp; + int ret = -EINVAL; + int h; + + if (head == NULL || f == NULL) + goto out; + + fp = &head->ht[fw_hash(f->id)]; + + for (pfp = rtnl_dereference(*fp); pfp; + fp = &pfp->next, pfp = rtnl_dereference(*fp)) { + if (pfp == f) { + RCU_INIT_POINTER(*fp, rtnl_dereference(f->next)); + tcf_unbind_filter(tp, &f->res); + tcf_exts_get_net(&f->exts); + tcf_queue_work(&f->rwork, fw_delete_filter_work); + ret = 0; + break; + } + } + + *last = true; + for (h = 0; h < HTSIZE; h++) { + if (rcu_access_pointer(head->ht[h])) { + *last = false; + break; + } + } + +out: + return ret; +} + +static const struct nla_policy fw_policy[TCA_FW_MAX + 1] = { + [TCA_FW_CLASSID] = { .type = NLA_U32 }, + [TCA_FW_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ }, + [TCA_FW_MASK] = { .type = NLA_U32 }, +}; + +static int fw_set_parms(struct net *net, struct tcf_proto *tp, + struct fw_filter *f, struct nlattr **tb, + struct nlattr **tca, unsigned long base, u32 flags, + struct netlink_ext_ack *extack) +{ + struct fw_head *head = rtnl_dereference(tp->root); + u32 mask; + int err; + + err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &f->exts, flags, + extack); + if (err < 0) + return err; + + if (tb[TCA_FW_CLASSID]) { + f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]); + tcf_bind_filter(tp, &f->res, base); + } + + if (tb[TCA_FW_INDEV]) { + int ret; + ret = tcf_change_indev(net, tb[TCA_FW_INDEV], extack); + if (ret < 0) + return ret; + f->ifindex = ret; + } + + err = -EINVAL; + if (tb[TCA_FW_MASK]) { + mask = nla_get_u32(tb[TCA_FW_MASK]); + if (mask != head->mask) + return err; + } else if (head->mask != 0xFFFFFFFF) + return err; + + return 0; +} + +static int fw_change(struct net *net, struct sk_buff *in_skb, + struct tcf_proto *tp, unsigned long base, + u32 handle, struct nlattr **tca, void **arg, + u32 flags, struct netlink_ext_ack *extack) +{ + struct fw_head *head = rtnl_dereference(tp->root); + struct fw_filter *f = *arg; + struct nlattr *opt = tca[TCA_OPTIONS]; + struct nlattr *tb[TCA_FW_MAX + 1]; + int err; + + if (!opt) + return handle ? -EINVAL : 0; /* Succeed if it is old method. */ + + err = nla_parse_nested_deprecated(tb, TCA_FW_MAX, opt, fw_policy, + NULL); + if (err < 0) + return err; + + if (f) { + struct fw_filter *pfp, *fnew; + struct fw_filter __rcu **fp; + + if (f->id != handle && handle) + return -EINVAL; + + fnew = kzalloc(sizeof(struct fw_filter), GFP_KERNEL); + if (!fnew) + return -ENOBUFS; + + fnew->id = f->id; + fnew->res = f->res; + fnew->ifindex = f->ifindex; + fnew->tp = f->tp; + + err = tcf_exts_init(&fnew->exts, net, TCA_FW_ACT, + TCA_FW_POLICE); + if (err < 0) { + kfree(fnew); + return err; + } + + err = fw_set_parms(net, tp, fnew, tb, tca, base, flags, extack); + if (err < 0) { + tcf_exts_destroy(&fnew->exts); + kfree(fnew); + return err; + } + + fp = &head->ht[fw_hash(fnew->id)]; + for (pfp = rtnl_dereference(*fp); pfp; + fp = &pfp->next, pfp = rtnl_dereference(*fp)) + if (pfp == f) + break; + + RCU_INIT_POINTER(fnew->next, rtnl_dereference(pfp->next)); + rcu_assign_pointer(*fp, fnew); + tcf_unbind_filter(tp, &f->res); + tcf_exts_get_net(&f->exts); + tcf_queue_work(&f->rwork, fw_delete_filter_work); + + *arg = fnew; + return err; + } + + if (!handle) + return -EINVAL; + + if (!head) { + u32 mask = 0xFFFFFFFF; + if (tb[TCA_FW_MASK]) + mask = nla_get_u32(tb[TCA_FW_MASK]); + + head = kzalloc(sizeof(*head), GFP_KERNEL); + if (!head) + return -ENOBUFS; + head->mask = mask; + + rcu_assign_pointer(tp->root, head); + } + + f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL); + if (f == NULL) + return -ENOBUFS; + + err = tcf_exts_init(&f->exts, net, TCA_FW_ACT, TCA_FW_POLICE); + if (err < 0) + goto errout; + f->id = handle; + f->tp = tp; + + err = fw_set_parms(net, tp, f, tb, tca, base, flags, extack); + if (err < 0) + goto errout; + + RCU_INIT_POINTER(f->next, head->ht[fw_hash(handle)]); + rcu_assign_pointer(head->ht[fw_hash(handle)], f); + + *arg = f; + return 0; + +errout: + tcf_exts_destroy(&f->exts); + kfree(f); + return err; +} + +static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg, + bool rtnl_held) +{ + struct fw_head *head = rtnl_dereference(tp->root); + int h; + + if (head == NULL) + arg->stop = 1; + + if (arg->stop) + return; + + for (h = 0; h < HTSIZE; h++) { + struct fw_filter *f; + + for (f = rtnl_dereference(head->ht[h]); f; + f = rtnl_dereference(f->next)) { + if (!tc_cls_stats_dump(tp, arg, f)) + return; + } + } +} + +static int fw_dump(struct net *net, struct tcf_proto *tp, void *fh, + struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) +{ + struct fw_head *head = rtnl_dereference(tp->root); + struct fw_filter *f = fh; + struct nlattr *nest; + + if (f == NULL) + return skb->len; + + t->tcm_handle = f->id; + + if (!f->res.classid && !tcf_exts_has_actions(&f->exts)) + return skb->len; + + nest = nla_nest_start_noflag(skb, TCA_OPTIONS); + if (nest == NULL) + goto nla_put_failure; + + if (f->res.classid && + nla_put_u32(skb, TCA_FW_CLASSID, f->res.classid)) + goto nla_put_failure; + if (f->ifindex) { + struct net_device *dev; + dev = __dev_get_by_index(net, f->ifindex); + if (dev && nla_put_string(skb, TCA_FW_INDEV, dev->name)) + goto nla_put_failure; + } + if (head->mask != 0xFFFFFFFF && + nla_put_u32(skb, TCA_FW_MASK, head->mask)) + goto nla_put_failure; + + if (tcf_exts_dump(skb, &f->exts) < 0) + goto nla_put_failure; + + nla_nest_end(skb, nest); + + if (tcf_exts_dump_stats(skb, &f->exts) < 0) + goto nla_put_failure; + + return skb->len; + +nla_put_failure: + nla_nest_cancel(skb, nest); + return -1; +} + +static void fw_bind_class(void *fh, u32 classid, unsigned long cl, void *q, + unsigned long base) +{ + struct fw_filter *f = fh; + + tc_cls_bind_class(classid, cl, q, &f->res, base); +} + +static struct tcf_proto_ops cls_fw_ops __read_mostly = { + .kind = "fw", + .classify = fw_classify, + .init = fw_init, + .destroy = fw_destroy, + .get = fw_get, + .change = fw_change, + .delete = fw_delete, + .walk = fw_walk, + .dump = fw_dump, + .bind_class = fw_bind_class, + .owner = THIS_MODULE, +}; + +static int __init init_fw(void) +{ + return register_tcf_proto_ops(&cls_fw_ops); +} + +static void __exit exit_fw(void) +{ + unregister_tcf_proto_ops(&cls_fw_ops); +} + +module_init(init_fw) +module_exit(exit_fw) +MODULE_LICENSE("GPL"); |