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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 05:34:00 +08:00
linux-next/tools
Jesper Dangaard Brouer 6710e11269 bpf: introduce new bpf cpu map type BPF_MAP_TYPE_CPUMAP
The 'cpumap' is primarily used as a backend map for XDP BPF helper
call bpf_redirect_map() and XDP_REDIRECT action, like 'devmap'.

This patch implement the main part of the map.  It is not connected to
the XDP redirect system yet, and no SKB allocation are done yet.

The main concern in this patch is to ensure the datapath can run
without any locking.  This adds complexity to the setup and tear-down
procedure, which assumptions are extra carefully documented in the
code comments.

V2:
 - make sure array isn't larger than NR_CPUS
 - make sure CPUs added is a valid possible CPU

V3: fix nitpicks from Jakub Kicinski <kubakici@wp.pl>

V5:
 - Restrict map allocation to root / CAP_SYS_ADMIN
 - WARN_ON_ONCE if queue is not empty on tear-down
 - Return -EPERM on memlock limit instead of -ENOMEM
 - Error code in __cpu_map_entry_alloc() also handle ptr_ring_cleanup()
 - Moved cpu_map_enqueue() to next patch

V6: all notice by Daniel Borkmann
 - Fix err return code in cpu_map_alloc() introduced in V5
 - Move cpu_possible() check after max_entries boundary check
 - Forbid usage initially in check_map_func_compatibility()

V7:
 - Fix alloc error path spotted by Daniel Borkmann
 - Did stress test adding+removing CPUs from the map concurrently
 - Fixed refcnt issue on cpu_map_entry, kthread started too soon
 - Make sure packets are flushed during tear-down, involved use of
   rcu_barrier() and kthread_run only exit after queue is empty
 - Fix alloc error path in __cpu_map_entry_alloc() for ptr_ring

V8:
 - Nitpicking comments and gramma by Edward Cree
 - Fix missing semi-colon introduced in V7 due to rebasing
 - Move struct bpf_cpu_map_entry members cpu+map_id to tracepoint patch

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-18 12:12:18 +01:00
..
accounting
arch tools include: Sync kernel ABI headers with tooling headers 2017-09-25 10:39:44 -03:00
bpf tools: bpftool: use the kernel's instruction printer 2017-10-10 12:30:16 -07:00
build tools build tests: Don't hardcode gcc name 2017-08-28 16:44:44 -03:00
cgroup
firewire
gpio gpio-hammer: fix make consumer_label suitable to work on gpio-nails 2017-01-26 16:29:09 +01:00
hv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-09-06 14:45:08 -07:00
iio iio: tools: add install section 2017-08-09 14:31:58 +01:00
include bpf: introduce new bpf cpu map type BPF_MAP_TYPE_CPUMAP 2017-10-18 12:12:18 +01:00
kvm/kvm_stat tools/kvm_stat: add '-f help' to get the available event list 2017-07-26 19:04:53 +02:00
laptop
leds tools/leds: Add led_hw_brightness_mon program 2017-02-14 22:20:23 +01:00
lib libbpf: use map_flags when creating maps 2017-10-05 21:42:28 -07:00
nfsd
objtool objtool: Support unoptimized frame pointer setup 2017-09-28 07:25:54 +02:00
pci tools: PCI: Add a missing option help line 2017-08-29 16:03:34 -05:00
pcmcia
perf perf/urgent fixes: 2017-09-29 19:31:46 +02:00
power Kbuild updates for v4.14 2017-09-14 13:46:33 -07:00
scripts Kbuild updates for v4.14 2017-09-14 13:46:33 -07:00
spi spi: tools: add install section 2017-07-26 12:25:28 +01:00
testing tc-testing: fix the -l argument bug in tdc.py 2017-10-14 18:47:53 -07:00
thermal/tmon
time
usb usbip: auto retry for concurrent attach 2017-08-31 18:08:45 +02:00
virtio tools/virtio: fix spelling mistake: "wakeus" -> "wakeups" 2017-05-09 16:43:24 +03:00
vm tools/vm: add missing Makefile rules 2017-02-22 16:41:26 -08:00
Makefile tools: rename tools/net directory to tools/bpf 2017-10-04 21:45:05 -07:00