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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 /tools/testing/selftests/bpf/prog_tests/mmap.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 'tools/testing/selftests/bpf/prog_tests/mmap.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/mmap.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/mmap.c b/tools/testing/selftests/bpf/prog_tests/mmap.c new file mode 100644 index 000000000..a271d5a0f --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/mmap.c @@ -0,0 +1,304 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> +#include <sys/mman.h> +#include "test_mmap.skel.h" + +struct map_data { + __u64 val[512 * 4]; +}; + +static size_t roundup_page(size_t sz) +{ + long page_size = sysconf(_SC_PAGE_SIZE); + return (sz + page_size - 1) / page_size * page_size; +} + +void test_mmap(void) +{ + const size_t bss_sz = roundup_page(sizeof(struct test_mmap__bss)); + const size_t map_sz = roundup_page(sizeof(struct map_data)); + const int zero = 0, one = 1, two = 2, far = 1500; + const long page_size = sysconf(_SC_PAGE_SIZE); + int err, duration = 0, i, data_map_fd, data_map_id, tmp_fd, rdmap_fd; + struct bpf_map *data_map, *bss_map; + void *bss_mmaped = NULL, *map_mmaped = NULL, *tmp0, *tmp1, *tmp2; + struct test_mmap__bss *bss_data; + struct bpf_map_info map_info; + __u32 map_info_sz = sizeof(map_info); + struct map_data *map_data; + struct test_mmap *skel; + __u64 val = 0; + + skel = test_mmap__open(); + if (CHECK(!skel, "skel_open", "skeleton open failed\n")) + return; + + err = bpf_map__set_max_entries(skel->maps.rdonly_map, page_size); + if (CHECK(err != 0, "bpf_map__set_max_entries", "bpf_map__set_max_entries failed\n")) + goto cleanup; + + /* at least 4 pages of data */ + err = bpf_map__set_max_entries(skel->maps.data_map, + 4 * (page_size / sizeof(u64))); + if (CHECK(err != 0, "bpf_map__set_max_entries", "bpf_map__set_max_entries failed\n")) + goto cleanup; + + err = test_mmap__load(skel); + if (CHECK(err != 0, "skel_load", "skeleton load failed\n")) + goto cleanup; + + bss_map = skel->maps.bss; + data_map = skel->maps.data_map; + data_map_fd = bpf_map__fd(data_map); + + rdmap_fd = bpf_map__fd(skel->maps.rdonly_map); + tmp1 = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, rdmap_fd, 0); + if (CHECK(tmp1 != MAP_FAILED, "rdonly_write_mmap", "unexpected success\n")) { + munmap(tmp1, page_size); + goto cleanup; + } + /* now double-check if it's mmap()'able at all */ + tmp1 = mmap(NULL, page_size, PROT_READ, MAP_SHARED, rdmap_fd, 0); + if (CHECK(tmp1 == MAP_FAILED, "rdonly_read_mmap", "failed: %d\n", errno)) + goto cleanup; + + /* get map's ID */ + memset(&map_info, 0, map_info_sz); + err = bpf_map_get_info_by_fd(data_map_fd, &map_info, &map_info_sz); + if (CHECK(err, "map_get_info", "failed %d\n", errno)) + goto cleanup; + data_map_id = map_info.id; + + /* mmap BSS map */ + bss_mmaped = mmap(NULL, bss_sz, PROT_READ | PROT_WRITE, MAP_SHARED, + bpf_map__fd(bss_map), 0); + if (CHECK(bss_mmaped == MAP_FAILED, "bss_mmap", + ".bss mmap failed: %d\n", errno)) { + bss_mmaped = NULL; + goto cleanup; + } + /* map as R/W first */ + map_mmaped = mmap(NULL, map_sz, PROT_READ | PROT_WRITE, MAP_SHARED, + data_map_fd, 0); + if (CHECK(map_mmaped == MAP_FAILED, "data_mmap", + "data_map mmap failed: %d\n", errno)) { + map_mmaped = NULL; + goto cleanup; + } + + bss_data = bss_mmaped; + map_data = map_mmaped; + + CHECK_FAIL(bss_data->in_val); + CHECK_FAIL(bss_data->out_val); + CHECK_FAIL(skel->bss->in_val); + CHECK_FAIL(skel->bss->out_val); + CHECK_FAIL(map_data->val[0]); + CHECK_FAIL(map_data->val[1]); + CHECK_FAIL(map_data->val[2]); + CHECK_FAIL(map_data->val[far]); + + err = test_mmap__attach(skel); + if (CHECK(err, "attach_raw_tp", "err %d\n", err)) + goto cleanup; + + bss_data->in_val = 123; + val = 111; + CHECK_FAIL(bpf_map_update_elem(data_map_fd, &zero, &val, 0)); + + usleep(1); + + CHECK_FAIL(bss_data->in_val != 123); + CHECK_FAIL(bss_data->out_val != 123); + CHECK_FAIL(skel->bss->in_val != 123); + CHECK_FAIL(skel->bss->out_val != 123); + CHECK_FAIL(map_data->val[0] != 111); + CHECK_FAIL(map_data->val[1] != 222); + CHECK_FAIL(map_data->val[2] != 123); + CHECK_FAIL(map_data->val[far] != 3 * 123); + + CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &zero, &val)); + CHECK_FAIL(val != 111); + CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &one, &val)); + CHECK_FAIL(val != 222); + CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &two, &val)); + CHECK_FAIL(val != 123); + CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &far, &val)); + CHECK_FAIL(val != 3 * 123); + + /* data_map freeze should fail due to R/W mmap() */ + err = bpf_map_freeze(data_map_fd); + if (CHECK(!err || errno != EBUSY, "no_freeze", + "data_map freeze succeeded: err=%d, errno=%d\n", err, errno)) + goto cleanup; + + err = mprotect(map_mmaped, map_sz, PROT_READ); + if (CHECK(err, "mprotect_ro", "mprotect to r/o failed %d\n", errno)) + goto cleanup; + + /* unmap R/W mapping */ + err = munmap(map_mmaped, map_sz); + map_mmaped = NULL; + if (CHECK(err, "data_map_munmap", "data_map munmap failed: %d\n", errno)) + goto cleanup; + + /* re-map as R/O now */ + map_mmaped = mmap(NULL, map_sz, PROT_READ, MAP_SHARED, data_map_fd, 0); + if (CHECK(map_mmaped == MAP_FAILED, "data_mmap", + "data_map R/O mmap failed: %d\n", errno)) { + map_mmaped = NULL; + goto cleanup; + } + err = mprotect(map_mmaped, map_sz, PROT_WRITE); + if (CHECK(!err, "mprotect_wr", "mprotect() succeeded unexpectedly!\n")) + goto cleanup; + err = mprotect(map_mmaped, map_sz, PROT_EXEC); + if (CHECK(!err, "mprotect_ex", "mprotect() succeeded unexpectedly!\n")) + goto cleanup; + map_data = map_mmaped; + + /* map/unmap in a loop to test ref counting */ + for (i = 0; i < 10; i++) { + int flags = i % 2 ? PROT_READ : PROT_WRITE; + void *p; + + p = mmap(NULL, map_sz, flags, MAP_SHARED, data_map_fd, 0); + if (CHECK_FAIL(p == MAP_FAILED)) + goto cleanup; + err = munmap(p, map_sz); + if (CHECK_FAIL(err)) + goto cleanup; + } + + /* data_map freeze should now succeed due to no R/W mapping */ + err = bpf_map_freeze(data_map_fd); + if (CHECK(err, "freeze", "data_map freeze failed: err=%d, errno=%d\n", + err, errno)) + goto cleanup; + + /* mapping as R/W now should fail */ + tmp1 = mmap(NULL, map_sz, PROT_READ | PROT_WRITE, MAP_SHARED, + data_map_fd, 0); + if (CHECK(tmp1 != MAP_FAILED, "data_mmap", "mmap succeeded\n")) { + munmap(tmp1, map_sz); + goto cleanup; + } + + bss_data->in_val = 321; + usleep(1); + CHECK_FAIL(bss_data->in_val != 321); + CHECK_FAIL(bss_data->out_val != 321); + CHECK_FAIL(skel->bss->in_val != 321); + CHECK_FAIL(skel->bss->out_val != 321); + CHECK_FAIL(map_data->val[0] != 111); + CHECK_FAIL(map_data->val[1] != 222); + CHECK_FAIL(map_data->val[2] != 321); + CHECK_FAIL(map_data->val[far] != 3 * 321); + + /* check some more advanced mmap() manipulations */ + + tmp0 = mmap(NULL, 4 * page_size, PROT_READ, MAP_SHARED | MAP_ANONYMOUS, + -1, 0); + if (CHECK(tmp0 == MAP_FAILED, "adv_mmap0", "errno %d\n", errno)) + goto cleanup; + + /* map all but last page: pages 1-3 mapped */ + tmp1 = mmap(tmp0, 3 * page_size, PROT_READ, MAP_SHARED | MAP_FIXED, + data_map_fd, 0); + if (CHECK(tmp0 != tmp1, "adv_mmap1", "tmp0: %p, tmp1: %p\n", tmp0, tmp1)) { + munmap(tmp0, 4 * page_size); + goto cleanup; + } + + /* unmap second page: pages 1, 3 mapped */ + err = munmap(tmp1 + page_size, page_size); + if (CHECK(err, "adv_mmap2", "errno %d\n", errno)) { + munmap(tmp1, 4 * page_size); + goto cleanup; + } + + /* map page 2 back */ + tmp2 = mmap(tmp1 + page_size, page_size, PROT_READ, + MAP_SHARED | MAP_FIXED, data_map_fd, 0); + if (CHECK(tmp2 == MAP_FAILED, "adv_mmap3", "errno %d\n", errno)) { + munmap(tmp1, page_size); + munmap(tmp1 + 2*page_size, 2 * page_size); + goto cleanup; + } + CHECK(tmp1 + page_size != tmp2, "adv_mmap4", + "tmp1: %p, tmp2: %p\n", tmp1, tmp2); + + /* re-map all 4 pages */ + tmp2 = mmap(tmp1, 4 * page_size, PROT_READ, MAP_SHARED | MAP_FIXED, + data_map_fd, 0); + if (CHECK(tmp2 == MAP_FAILED, "adv_mmap5", "errno %d\n", errno)) { + munmap(tmp1, 4 * page_size); /* unmap page 1 */ + goto cleanup; + } + CHECK(tmp1 != tmp2, "adv_mmap6", "tmp1: %p, tmp2: %p\n", tmp1, tmp2); + + map_data = tmp2; + CHECK_FAIL(bss_data->in_val != 321); + CHECK_FAIL(bss_data->out_val != 321); + CHECK_FAIL(skel->bss->in_val != 321); + CHECK_FAIL(skel->bss->out_val != 321); + CHECK_FAIL(map_data->val[0] != 111); + CHECK_FAIL(map_data->val[1] != 222); + CHECK_FAIL(map_data->val[2] != 321); + CHECK_FAIL(map_data->val[far] != 3 * 321); + + munmap(tmp2, 4 * page_size); + + /* map all 4 pages, but with pg_off=1 page, should fail */ + tmp1 = mmap(NULL, 4 * page_size, PROT_READ, MAP_SHARED | MAP_FIXED, + data_map_fd, page_size /* initial page shift */); + if (CHECK(tmp1 != MAP_FAILED, "adv_mmap7", "unexpected success")) { + munmap(tmp1, 4 * page_size); + goto cleanup; + } + + tmp1 = mmap(NULL, map_sz, PROT_READ, MAP_SHARED, data_map_fd, 0); + if (CHECK(tmp1 == MAP_FAILED, "last_mmap", "failed %d\n", errno)) + goto cleanup; + + test_mmap__destroy(skel); + skel = NULL; + CHECK_FAIL(munmap(bss_mmaped, bss_sz)); + bss_mmaped = NULL; + CHECK_FAIL(munmap(map_mmaped, map_sz)); + map_mmaped = NULL; + + /* map should be still held by active mmap */ + tmp_fd = bpf_map_get_fd_by_id(data_map_id); + if (CHECK(tmp_fd < 0, "get_map_by_id", "failed %d\n", errno)) { + munmap(tmp1, map_sz); + goto cleanup; + } + close(tmp_fd); + + /* this should release data map finally */ + munmap(tmp1, map_sz); + + /* we need to wait for RCU grace period */ + for (i = 0; i < 10000; i++) { + __u32 id = data_map_id - 1; + if (bpf_map_get_next_id(id, &id) || id > data_map_id) + break; + usleep(1); + } + + /* should fail to get map FD by non-existing ID */ + tmp_fd = bpf_map_get_fd_by_id(data_map_id); + if (CHECK(tmp_fd >= 0, "get_map_by_id_after", + "unexpectedly succeeded %d\n", tmp_fd)) { + close(tmp_fd); + goto cleanup; + } + +cleanup: + if (bss_mmaped) + CHECK_FAIL(munmap(bss_mmaped, bss_sz)); + if (map_mmaped) + CHECK_FAIL(munmap(map_mmaped, map_sz)); + test_mmap__destroy(skel); +} |