diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-27 02:07:23 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-27 02:07:23 +0300 |
| commit | 6e98b09da931a00bf4e0477d0fa52748bf28fcce (patch) | |
| tree | 9c658ed95add5693f42f29f63df80a2ede3f6ec2 /net/bpf/test_run.c | |
| parent | b68ee1c6131c540a62ecd443be89c406401df091 (diff) | |
| parent | 9b78d919632b7149d311aaad5a977e4b48b10321 (diff) | |
| download | linux-6e98b09da931a00bf4e0477d0fa52748bf28fcce.tar.xz | |
Merge tag 'net-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Paolo Abeni:
"Core:
- Introduce a config option to tweak MAX_SKB_FRAGS. Increasing the
default value allows for better BIG TCP performances
- Reduce compound page head access for zero-copy data transfers
- RPS/RFS improvements, avoiding unneeded NET_RX_SOFTIRQ when
possible
- Threaded NAPI improvements, adding defer skb free support and
unneeded softirq avoidance
- Address dst_entry reference count scalability issues, via false
sharing avoidance and optimize refcount tracking
- Add lockless accesses annotation to sk_err[_soft]
- Optimize again the skb struct layout
- Extends the skb drop reasons to make it usable by multiple
subsystems
- Better const qualifier awareness for socket casts
BPF:
- Add skb and XDP typed dynptrs which allow BPF programs for more
ergonomic and less brittle iteration through data and
variable-sized accesses
- Add a new BPF netfilter program type and minimal support to hook
BPF programs to netfilter hooks such as prerouting or forward
- Add more precise memory usage reporting for all BPF map types
- Adds support for using {FOU,GUE} encap with an ipip device
operating in collect_md mode and add a set of BPF kfuncs for
controlling encap params
- Allow BPF programs to detect at load time whether a particular
kfunc exists or not, and also add support for this in light
skeleton
- Bigger batch of BPF verifier improvements to prepare for upcoming
BPF open-coded iterators allowing for less restrictive looping
capabilities
- Rework RCU enforcement in the verifier, add kptr_rcu and enforce
BPF programs to NULL-check before passing such pointers into kfunc
- Add support for kptrs in percpu hashmaps, percpu LRU hashmaps and
in local storage maps
- Enable RCU semantics for task BPF kptrs and allow referenced kptr
tasks to be stored in BPF maps
- Add support for refcounted local kptrs to the verifier for allowing
shared ownership, useful for adding a node to both the BPF list and
rbtree
- Add BPF verifier support for ST instructions in
convert_ctx_access() which will help new -mcpu=v4 clang flag to
start emitting them
- Add ARM32 USDT support to libbpf
- Improve bpftool's visual program dump which produces the control
flow graph in a DOT format by adding C source inline annotations
Protocols:
- IPv4: Allow adding to IPv4 address a 'protocol' tag. Such value
indicates the provenance of the IP address
- IPv6: optimize route lookup, dropping unneeded R/W lock acquisition
- Add the handshake upcall mechanism, allowing the user-space to
implement generic TLS handshake on kernel's behalf
- Bridge: support per-{Port, VLAN} neighbor suppression, increasing
resilience to nodes failures
- SCTP: add support for Fair Capacity and Weighted Fair Queueing
schedulers
- MPTCP: delay first subflow allocation up to its first usage. This
will allow for later better LSM interaction
- xfrm: Remove inner/outer modes from input/output path. These are
not needed anymore
- WiFi:
- reduced neighbor report (RNR) handling for AP mode
- HW timestamping support
- support for randomized auth/deauth TA for PASN privacy
- per-link debugfs for multi-link
- TC offload support for mac80211 drivers
- mac80211 mesh fast-xmit and fast-rx support
- enable Wi-Fi 7 (EHT) mesh support
Netfilter:
- Add nf_tables 'brouting' support, to force a packet to be routed
instead of being bridged
- Update bridge netfilter and ovs conntrack helpers to handle IPv6
Jumbo packets properly, i.e. fetch the packet length from
hop-by-hop extension header. This is needed for BIT TCP support
- The iptables 32bit compat interface isn't compiled in by default
anymore
- Move ip(6)tables builtin icmp matches to the udptcp one. This has
the advantage that icmp/icmpv6 match doesn't load the
iptables/ip6tables modules anymore when iptables-nft is used
- Extended netlink error report for netdevice in flowtables and
netdev/chains. Allow for incrementally add/delete devices to netdev
basechain. Allow to create netdev chain without device
Driver API:
- Remove redundant Device Control Error Reporting Enable, as PCI core
has already error reporting enabled at enumeration time
- Move Multicast DB netlink handlers to core, allowing devices other
then bridge to use them
- Allow the page_pool to directly recycle the pages from safely
localized NAPI
- Implement lockless TX queue stop/wake combo macros, allowing for
further code de-duplication and sanitization
- Add YNL support for user headers and struct attrs
- Add partial YNL specification for devlink
- Add partial YNL specification for ethtool
- Add tc-mqprio and tc-taprio support for preemptible traffic classes
- Add tx push buf len param to ethtool, specifies the maximum number
of bytes of a transmitted packet a driver can push directly to the
underlying device
- Add basic LED support for switch/phy
- Add NAPI documentation, stop relaying on external links
- Convert dsa_master_ioctl() to netdev notifier. This is a
preparatory work to make the hardware timestamping layer selectable
by user space
- Add transceiver support and improve the error messages for CAN-FD
controllers
New hardware / drivers:
- Ethernet:
- AMD/Pensando core device support
- MediaTek MT7981 SoC
- MediaTek MT7988 SoC
- Broadcom BCM53134 embedded switch
- Texas Instruments CPSW9G ethernet switch
- Qualcomm EMAC3 DWMAC ethernet
- StarFive JH7110 SoC
- NXP CBTX ethernet PHY
- WiFi:
- Apple M1 Pro/Max devices
- RealTek rtl8710bu/rtl8188gu
- RealTek rtl8822bs, rtl8822cs and rtl8821cs SDIO chipset
- Bluetooth:
- Realtek RTL8821CS, RTL8851B, RTL8852BS
- Mediatek MT7663, MT7922
- NXP w8997
- Actions Semi ATS2851
- QTI WCN6855
- Marvell 88W8997
- Can:
- STMicroelectronics bxcan stm32f429
Drivers:
- Ethernet NICs:
- Intel (1G, icg):
- add tracking and reporting of QBV config errors
- add support for configuring max SDU for each Tx queue
- Intel (100G, ice):
- refactor mailbox overflow detection to support Scalable IOV
- GNSS interface optimization
- Intel (i40e):
- support XDP multi-buffer
- nVidia/Mellanox:
- add the support for linux bridge multicast offload
- enable TC offload for egress and engress MACVLAN over bond
- add support for VxLAN GBP encap/decap flows offload
- extend packet offload to fully support libreswan
- support tunnel mode in mlx5 IPsec packet offload
- extend XDP multi-buffer support
- support MACsec VLAN offload
- add support for dynamic msix vectors allocation
- drop RX page_cache and fully use page_pool
- implement thermal zone to report NIC temperature
- Netronome/Corigine:
- add support for multi-zone conntrack offload
- Solarflare/Xilinx:
- support offloading TC VLAN push/pop actions to the MAE
- support TC decap rules
- support unicast PTP
- Other NICs:
- Broadcom (bnxt): enforce software based freq adjustments only on
shared PHC NIC
- RealTek (r8169): refactor to addess ASPM issues during NAPI poll
- Micrel (lan8841): add support for PTP_PF_PEROUT
- Cadence (macb): enable PTP unicast
- Engleder (tsnep): add XDP socket zero-copy support
- virtio-net: implement exact header length guest feature
- veth: add page_pool support for page recycling
- vxlan: add MDB data path support
- gve: add XDP support for GQI-QPL format
- geneve: accept every ethertype
- macvlan: allow some packets to bypass broadcast queue
- mana: add support for jumbo frame
- Ethernet high-speed switches:
- Microchip (sparx5): Add support for TC flower templates
- Ethernet embedded switches:
- Broadcom (b54):
- configure 6318 and 63268 RGMII ports
- Marvell (mv88e6xxx):
- faster C45 bus scan
- Microchip:
- lan966x:
- add support for IS1 VCAP
- better TX/RX from/to CPU performances
- ksz9477: add ETS Qdisc support
- ksz8: enhance static MAC table operations and error handling
- sama7g5: add PTP capability
- NXP (ocelot):
- add support for external ports
- add support for preemptible traffic classes
- Texas Instruments:
- add CPSWxG SGMII support for J7200 and J721E
- Intel WiFi (iwlwifi):
- preparation for Wi-Fi 7 EHT and multi-link support
- EHT (Wi-Fi 7) sniffer support
- hardware timestamping support for some devices/firwmares
- TX beacon protection on newer hardware
- Qualcomm 802.11ax WiFi (ath11k):
- MU-MIMO parameters support
- ack signal support for management packets
- RealTek WiFi (rtw88):
- SDIO bus support
- better support for some SDIO devices (e.g. MAC address from
efuse)
- RealTek WiFi (rtw89):
- HW scan support for 8852b
- better support for 6 GHz scanning
- support for various newer firmware APIs
- framework firmware backwards compatibility
- MediaTek WiFi (mt76):
- P2P support
- mesh A-MSDU support
- EHT (Wi-Fi 7) support
- coredump support"
* tag 'net-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2078 commits)
net: phy: hide the PHYLIB_LEDS knob
net: phy: marvell-88x2222: remove unnecessary (void*) conversions
tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.
net: amd: Fix link leak when verifying config failed
net: phy: marvell: Fix inconsistent indenting in led_blink_set
lan966x: Don't use xdp_frame when action is XDP_TX
tsnep: Add XDP socket zero-copy TX support
tsnep: Add XDP socket zero-copy RX support
tsnep: Move skb receive action to separate function
tsnep: Add functions for queue enable/disable
tsnep: Rework TX/RX queue initialization
tsnep: Replace modulo operation with mask
net: phy: dp83867: Add led_brightness_set support
net: phy: Fix reading LED reg property
drivers: nfc: nfcsim: remove return value check of `dev_dir`
net: phy: dp83867: Remove unnecessary (void*) conversions
net: ethtool: coalesce: try to make user settings stick twice
net: mana: Check if netdev/napi_alloc_frag returns single page
net: mana: Rename mana_refill_rxoob and remove some empty lines
net: veth: add page_pool stats
...
Diffstat (limited to 'net/bpf/test_run.c')
| -rw-r--r-- | net/bpf/test_run.c | 207 |
1 files changed, 189 insertions, 18 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index f81b24320a36..e79e3a415ca9 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -19,7 +19,9 @@ #include <linux/error-injection.h> #include <linux/smp.h> #include <linux/sock_diag.h> +#include <linux/netfilter.h> #include <net/xdp.h> +#include <net/netfilter/nf_bpf_link.h> #define CREATE_TRACE_POINTS #include <trace/events/bpf_test_run.h> @@ -215,6 +217,16 @@ static void xdp_test_run_teardown(struct xdp_test_data *xdp) kfree(xdp->skbs); } +static bool frame_was_changed(const struct xdp_page_head *head) +{ + /* xdp_scrub_frame() zeroes the data pointer, flags is the last field, + * i.e. has the highest chances to be overwritten. If those two are + * untouched, it's most likely safe to skip the context reset. + */ + return head->frame->data != head->orig_ctx.data || + head->frame->flags != head->orig_ctx.flags; +} + static bool ctx_was_changed(struct xdp_page_head *head) { return head->orig_ctx.data != head->ctx.data || @@ -224,7 +236,7 @@ static bool ctx_was_changed(struct xdp_page_head *head) static void reset_ctx(struct xdp_page_head *head) { - if (likely(!ctx_was_changed(head))) + if (likely(!frame_was_changed(head) && !ctx_was_changed(head))) return; head->ctx.data = head->orig_ctx.data; @@ -538,6 +550,11 @@ int noinline bpf_fentry_test8(struct bpf_fentry_test_t *arg) return (long)arg->a; } +__bpf_kfunc u32 bpf_fentry_test9(u32 *a) +{ + return *a; +} + __bpf_kfunc int bpf_modify_return_test(int a, int *b) { *b += 1; @@ -567,6 +584,11 @@ long noinline bpf_kfunc_call_test4(signed char a, short b, int c, long d) return (long)a + (long)b + (long)c + d; } +int noinline bpf_fentry_shadow_test(int a) +{ + return a + 1; +} + struct prog_test_member1 { int a; }; @@ -598,6 +620,11 @@ bpf_kfunc_call_test_acquire(unsigned long *scalar_ptr) return &prog_test_struct; } +__bpf_kfunc void bpf_kfunc_call_test_offset(struct prog_test_ref_kfunc *p) +{ + WARN_ON_ONCE(1); +} + __bpf_kfunc struct prog_test_member * bpf_kfunc_call_memb_acquire(void) { @@ -607,9 +634,6 @@ bpf_kfunc_call_memb_acquire(void) __bpf_kfunc void bpf_kfunc_call_test_release(struct prog_test_ref_kfunc *p) { - if (!p) - return; - refcount_dec(&p->cnt); } @@ -657,17 +681,6 @@ __bpf_kfunc void bpf_kfunc_call_int_mem_release(int *p) { } -__bpf_kfunc struct prog_test_ref_kfunc * -bpf_kfunc_call_test_kptr_get(struct prog_test_ref_kfunc **pp, int a, int b) -{ - struct prog_test_ref_kfunc *p = READ_ONCE(*pp); - - if (!p) - return NULL; - refcount_inc(&p->cnt); - return p; -} - struct prog_test_pass1 { int x0; struct { @@ -744,6 +757,7 @@ __bpf_kfunc void bpf_kfunc_call_test_mem_len_fail2(u64 *mem, int len) __bpf_kfunc void bpf_kfunc_call_test_ref(struct prog_test_ref_kfunc *p) { + /* p != NULL, but p->cnt could be 0 */ } __bpf_kfunc void bpf_kfunc_call_test_destructive(void) @@ -781,7 +795,6 @@ BTF_ID_FLAGS(func, bpf_kfunc_call_test_get_rdwr_mem, KF_RET_NULL) BTF_ID_FLAGS(func, bpf_kfunc_call_test_get_rdonly_mem, KF_RET_NULL) BTF_ID_FLAGS(func, bpf_kfunc_call_test_acq_rdonly_mem, KF_ACQUIRE | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_kfunc_call_int_mem_release, KF_RELEASE) -BTF_ID_FLAGS(func, bpf_kfunc_call_test_kptr_get, KF_ACQUIRE | KF_RET_NULL | KF_KPTR_GET) BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass_ctx) BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass1) BTF_ID_FLAGS(func, bpf_kfunc_call_test_pass2) @@ -791,9 +804,10 @@ BTF_ID_FLAGS(func, bpf_kfunc_call_test_fail3) BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_pass1) BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail1) BTF_ID_FLAGS(func, bpf_kfunc_call_test_mem_len_fail2) -BTF_ID_FLAGS(func, bpf_kfunc_call_test_ref, KF_TRUSTED_ARGS) +BTF_ID_FLAGS(func, bpf_kfunc_call_test_ref, KF_TRUSTED_ARGS | KF_RCU) BTF_ID_FLAGS(func, bpf_kfunc_call_test_destructive, KF_DESTRUCTIVE) BTF_ID_FLAGS(func, bpf_kfunc_call_test_static_unused_arg) +BTF_ID_FLAGS(func, bpf_kfunc_call_test_offset) BTF_SET8_END(test_sk_check_kfunc_ids) static void *bpf_test_init(const union bpf_attr *kattr, u32 user_size, @@ -843,7 +857,8 @@ int bpf_prog_test_run_tracing(struct bpf_prog *prog, bpf_fentry_test5(11, (void *)12, 13, 14, 15) != 65 || bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111 || bpf_fentry_test7((struct bpf_fentry_test_t *)0) != 0 || - bpf_fentry_test8(&arg) != 0) + bpf_fentry_test8(&arg) != 0 || + bpf_fentry_test9(&retval) != 0) goto out; break; case BPF_MODIFY_RETURN: @@ -1678,6 +1693,162 @@ out: return err; } +static int verify_and_copy_hook_state(struct nf_hook_state *state, + const struct nf_hook_state *user, + struct net_device *dev) +{ + if (user->in || user->out) + return -EINVAL; + + if (user->net || user->sk || user->okfn) + return -EINVAL; + + switch (user->pf) { + case NFPROTO_IPV4: + case NFPROTO_IPV6: + switch (state->hook) { + case NF_INET_PRE_ROUTING: + state->in = dev; + break; + case NF_INET_LOCAL_IN: + state->in = dev; + break; + case NF_INET_FORWARD: + state->in = dev; + state->out = dev; + break; + case NF_INET_LOCAL_OUT: + state->out = dev; + break; + case NF_INET_POST_ROUTING: + state->out = dev; + break; + } + + break; + default: + return -EINVAL; + } + + state->pf = user->pf; + state->hook = user->hook; + + return 0; +} + +static __be16 nfproto_eth(int nfproto) +{ + switch (nfproto) { + case NFPROTO_IPV4: + return htons(ETH_P_IP); + case NFPROTO_IPV6: + break; + } + + return htons(ETH_P_IPV6); +} + +int bpf_prog_test_run_nf(struct bpf_prog *prog, + const union bpf_attr *kattr, + union bpf_attr __user *uattr) +{ + struct net *net = current->nsproxy->net_ns; + struct net_device *dev = net->loopback_dev; + struct nf_hook_state *user_ctx, hook_state = { + .pf = NFPROTO_IPV4, + .hook = NF_INET_LOCAL_OUT, + }; + u32 size = kattr->test.data_size_in; + u32 repeat = kattr->test.repeat; + struct bpf_nf_ctx ctx = { + .state = &hook_state, + }; + struct sk_buff *skb = NULL; + u32 retval, duration; + void *data; + int ret; + + if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size) + return -EINVAL; + + if (size < sizeof(struct iphdr)) + return -EINVAL; + + data = bpf_test_init(kattr, kattr->test.data_size_in, size, + NET_SKB_PAD + NET_IP_ALIGN, + SKB_DATA_ALIGN(sizeof(struct skb_shared_info))); + if (IS_ERR(data)) + return PTR_ERR(data); + + if (!repeat) + repeat = 1; + + user_ctx = bpf_ctx_init(kattr, sizeof(struct nf_hook_state)); + if (IS_ERR(user_ctx)) { + kfree(data); + return PTR_ERR(user_ctx); + } + + if (user_ctx) { + ret = verify_and_copy_hook_state(&hook_state, user_ctx, dev); + if (ret) + goto out; + } + + skb = slab_build_skb(data); + if (!skb) { + ret = -ENOMEM; + goto out; + } + + data = NULL; /* data released via kfree_skb */ + + skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); + __skb_put(skb, size); + + ret = -EINVAL; + + if (hook_state.hook != NF_INET_LOCAL_OUT) { + if (size < ETH_HLEN + sizeof(struct iphdr)) + goto out; + + skb->protocol = eth_type_trans(skb, dev); + switch (skb->protocol) { + case htons(ETH_P_IP): + if (hook_state.pf == NFPROTO_IPV4) + break; + goto out; + case htons(ETH_P_IPV6): + if (size < ETH_HLEN + sizeof(struct ipv6hdr)) + goto out; + if (hook_state.pf == NFPROTO_IPV6) + break; + goto out; + default: + ret = -EPROTO; + goto out; + } + + skb_reset_network_header(skb); + } else { + skb->protocol = nfproto_eth(hook_state.pf); + } + + ctx.skb = skb; + + ret = bpf_test_run(prog, &ctx, repeat, &retval, &duration, false); + if (ret) + goto out; + + ret = bpf_test_finish(kattr, uattr, NULL, NULL, 0, retval, duration); + +out: + kfree(user_ctx); + kfree_skb(skb); + kfree(data); + return ret; +} + static const struct btf_kfunc_id_set bpf_prog_test_kfunc_set = { .owner = THIS_MODULE, .set = &test_sk_check_kfunc_ids, |