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author | 2020-10-15 18:42:13 -0700 | |
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committer | 2020-10-15 18:42:13 -0700 | |
commit | 9ff9b0d392ea08090cd1780fb196f36dbb586529 (patch) | |
tree | 276a3a5c4525b84dee64eda30b423fc31bf94850 /tools/testing/selftests/bpf/prog_tests/btf_dump.c | |
parent | Merge tag 'integrity-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity (diff) | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next (diff) | |
download | linux-dev-9ff9b0d392ea08090cd1780fb196f36dbb586529.tar.xz linux-dev-9ff9b0d392ea08090cd1780fb196f36dbb586529.zip |
Merge tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
- Add redirect_neigh() BPF packet redirect helper, allowing to limit
stack traversal in common container configs and improving TCP
back-pressure.
Daniel reports ~10Gbps => ~15Gbps single stream TCP performance gain.
- Expand netlink policy support and improve policy export to user
space. (Ge)netlink core performs request validation according to
declared policies. Expand the expressiveness of those policies
(min/max length and bitmasks). Allow dumping policies for particular
commands. This is used for feature discovery by user space (instead
of kernel version parsing or trial and error).
- Support IGMPv3/MLDv2 multicast listener discovery protocols in
bridge.
- Allow more than 255 IPv4 multicast interfaces.
- Add support for Type of Service (ToS) reflection in SYN/SYN-ACK
packets of TCPv6.
- In Multi-patch TCP (MPTCP) support concurrent transmission of data on
multiple subflows in a load balancing scenario. Enhance advertising
addresses via the RM_ADDR/ADD_ADDR options.
- Support SMC-Dv2 version of SMC, which enables multi-subnet
deployments.
- Allow more calls to same peer in RxRPC.
- Support two new Controller Area Network (CAN) protocols - CAN-FD and
ISO 15765-2:2016.
- Add xfrm/IPsec compat layer, solving the 32bit user space on 64bit
kernel problem.
- Add TC actions for implementing MPLS L2 VPNs.
- Improve nexthop code - e.g. handle various corner cases when nexthop
objects are removed from groups better, skip unnecessary
notifications and make it easier to offload nexthops into HW by
converting to a blocking notifier.
- Support adding and consuming TCP header options by BPF programs,
opening the doors for easy experimental and deployment-specific TCP
option use.
- Reorganize TCP congestion control (CC) initialization to simplify
life of TCP CC implemented in BPF.
- Add support for shipping BPF programs with the kernel and loading
them early on boot via the User Mode Driver mechanism, hence reusing
all the user space infra we have.
- Support sleepable BPF programs, initially targeting LSM and tracing.
- Add bpf_d_path() helper for returning full path for given 'struct
path'.
- Make bpf_tail_call compatible with bpf-to-bpf calls.
- Allow BPF programs to call map_update_elem on sockmaps.
- Add BPF Type Format (BTF) support for type and enum discovery, as
well as support for using BTF within the kernel itself (current use
is for pretty printing structures).
- Support listing and getting information about bpf_links via the bpf
syscall.
- Enhance kernel interfaces around NIC firmware update. Allow
specifying overwrite mask to control if settings etc. are reset
during update; report expected max time operation may take to users;
support firmware activation without machine reboot incl. limits of
how much impact reset may have (e.g. dropping link or not).
- Extend ethtool configuration interface to report IEEE-standard
counters, to limit the need for per-vendor logic in user space.
- Adopt or extend devlink use for debug, monitoring, fw update in many
drivers (dsa loop, ice, ionic, sja1105, qed, mlxsw, mv88e6xxx,
dpaa2-eth).
- In mlxsw expose critical and emergency SFP module temperature alarms.
Refactor port buffer handling to make the defaults more suitable and
support setting these values explicitly via the DCBNL interface.
- Add XDP support for Intel's igb driver.
- Support offloading TC flower classification and filtering rules to
mscc_ocelot switches.
- Add PTP support for Marvell Octeontx2 and PP2.2 hardware, as well as
fixed interval period pulse generator and one-step timestamping in
dpaa-eth.
- Add support for various auth offloads in WiFi APs, e.g. SAE (WPA3)
offload.
- Add Lynx PHY/PCS MDIO module, and convert various drivers which have
this HW to use it. Convert mvpp2 to split PCS.
- Support Marvell Prestera 98DX3255 24-port switch ASICs, as well as
7-port Mediatek MT7531 IP.
- Add initial support for QCA6390 and IPQ6018 in ath11k WiFi driver,
and wcn3680 support in wcn36xx.
- Improve performance for packets which don't require much offloads on
recent Mellanox NICs by 20% by making multiple packets share a
descriptor entry.
- Move chelsio inline crypto drivers (for TLS and IPsec) from the
crypto subtree to drivers/net. Move MDIO drivers out of the phy
directory.
- Clean up a lot of W=1 warnings, reportedly the actively developed
subsections of networking drivers should now build W=1 warning free.
- Make sure drivers don't use in_interrupt() to dynamically adapt their
code. Convert tasklets to use new tasklet_setup API (sadly this
conversion is not yet complete).
* tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2583 commits)
Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"
net, sockmap: Don't call bpf_prog_put() on NULL pointer
bpf, selftest: Fix flaky tcp_hdr_options test when adding addr to lo
bpf, sockmap: Add locking annotations to iterator
netfilter: nftables: allow re-computing sctp CRC-32C in 'payload' statements
net: fix pos incrementment in ipv6_route_seq_next
net/smc: fix invalid return code in smcd_new_buf_create()
net/smc: fix valid DMBE buffer sizes
net/smc: fix use-after-free of delayed events
bpfilter: Fix build error with CONFIG_BPFILTER_UMH
cxgb4/ch_ipsec: Replace the module name to ch_ipsec from chcr
net: sched: Fix suspicious RCU usage while accessing tcf_tunnel_info
bpf: Fix register equivalence tracking.
rxrpc: Fix loss of final ack on shutdown
rxrpc: Fix bundle counting for exclusive connections
netfilter: restore NF_INET_NUMHOOKS
ibmveth: Identify ingress large send packets.
ibmveth: Switch order of ibmveth_helper calls.
cxgb4: handle 4-tuple PEDIT to NAT mode translation
selftests: Add VRF route leaking tests
...
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/btf_dump.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/btf_dump.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/btf_dump.c b/tools/testing/selftests/bpf/prog_tests/btf_dump.c index 39fb81d9daeb..c60091ee8a21 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf_dump.c +++ b/tools/testing/selftests/bpf/prog_tests/btf_dump.c @@ -129,6 +129,109 @@ done: return err; } +static char *dump_buf; +static size_t dump_buf_sz; +static FILE *dump_buf_file; + +void test_btf_dump_incremental(void) +{ + struct btf *btf = NULL; + struct btf_dump *d = NULL; + struct btf_dump_opts opts; + int id, err, i; + + dump_buf_file = open_memstream(&dump_buf, &dump_buf_sz); + if (!ASSERT_OK_PTR(dump_buf_file, "dump_memstream")) + return; + btf = btf__new_empty(); + if (!ASSERT_OK_PTR(btf, "new_empty")) + goto err_out; + opts.ctx = dump_buf_file; + d = btf_dump__new(btf, NULL, &opts, btf_dump_printf); + if (!ASSERT_OK(libbpf_get_error(d), "btf_dump__new")) + goto err_out; + + /* First, generate BTF corresponding to the following C code: + * + * enum { VAL = 1 }; + * + * struct s { int x; }; + * + */ + id = btf__add_enum(btf, NULL, 4); + ASSERT_EQ(id, 1, "enum_id"); + err = btf__add_enum_value(btf, "VAL", 1); + ASSERT_OK(err, "enum_val_ok"); + + id = btf__add_int(btf, "int", 4, BTF_INT_SIGNED); + ASSERT_EQ(id, 2, "int_id"); + + id = btf__add_struct(btf, "s", 4); + ASSERT_EQ(id, 3, "struct_id"); + err = btf__add_field(btf, "x", 2, 0, 0); + ASSERT_OK(err, "field_ok"); + + for (i = 1; i <= btf__get_nr_types(btf); i++) { + err = btf_dump__dump_type(d, i); + ASSERT_OK(err, "dump_type_ok"); + } + + fflush(dump_buf_file); + dump_buf[dump_buf_sz] = 0; /* some libc implementations don't do this */ + ASSERT_STREQ(dump_buf, +"enum {\n" +" VAL = 1,\n" +"};\n" +"\n" +"struct s {\n" +" int x;\n" +"};\n\n", "c_dump1"); + + /* Now, after dumping original BTF, append another struct that embeds + * anonymous enum. It also has a name conflict with the first struct: + * + * struct s___2 { + * enum { VAL___2 = 1 } x; + * struct s s; + * }; + * + * This will test that btf_dump'er maintains internal state properly. + * Note that VAL___2 enum value. It's because we've already emitted + * that enum as a global anonymous enum, so btf_dump will ensure that + * enum values don't conflict; + * + */ + fseek(dump_buf_file, 0, SEEK_SET); + + id = btf__add_struct(btf, "s", 4); + ASSERT_EQ(id, 4, "struct_id"); + err = btf__add_field(btf, "x", 1, 0, 0); + ASSERT_OK(err, "field_ok"); + err = btf__add_field(btf, "s", 3, 32, 0); + ASSERT_OK(err, "field_ok"); + + for (i = 1; i <= btf__get_nr_types(btf); i++) { + err = btf_dump__dump_type(d, i); + ASSERT_OK(err, "dump_type_ok"); + } + + fflush(dump_buf_file); + dump_buf[dump_buf_sz] = 0; /* some libc implementations don't do this */ + ASSERT_STREQ(dump_buf, +"struct s___2 {\n" +" enum {\n" +" VAL___2 = 1,\n" +" } x;\n" +" struct s s;\n" +"};\n\n" , "c_dump1"); + +err_out: + fclose(dump_buf_file); + free(dump_buf); + btf_dump__free(d); + btf__free(btf); +} + void test_btf_dump() { int i; @@ -140,4 +243,6 @@ void test_btf_dump() { test_btf_dump_case(i, &btf_dump_test_cases[i]); } + if (test__start_subtest("btf_dump: incremental")) + test_btf_dump_incremental(); } |