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Andrii Nakryiko 82e6b1eee6 bpf: Allow to specify user-provided bpf_cookie for BPF perf links 
Add ability for users to specify custom u64 value (bpf_cookie) when creating
BPF link for perf_event-backed BPF programs (kprobe/uprobe, perf_event,
tracepoints).

This is useful for cases when the same BPF program is used for attaching and
processing invocation of different tracepoints/kprobes/uprobes in a generic
fashion, but such that each invocation is distinguished from each other (e.g.,
BPF program can look up additional information associated with a specific
kernel function without having to rely on function IP lookups). This enables
new use cases to be implemented simply and efficiently that previously were
possible only through code generation (and thus multiple instances of almost
identical BPF program) or compilation at runtime (BCC-style) on target hosts
(even more expensive resource-wise). For uprobes it is not even possible in
some cases to know function IP before hand (e.g., when attaching to shared
library without PID filtering, in which case base load address is not known
for a library).

This is done by storing u64 bpf_cookie in struct bpf_prog_array_item,
corresponding to each attached and run BPF program. Given cgroup BPF programs
already use two 8-byte pointers for their needs and cgroup BPF programs don't
have (yet?) support for bpf_cookie, reuse that space through union of
cgroup_storage and new bpf_cookie field.

Make it available to kprobe/tracepoint BPF programs through bpf_trace_run_ctx.
This is set by BPF_PROG_RUN_ARRAY, used by kprobe/uprobe/tracepoint BPF
program execution code, which luckily is now also split from
BPF_PROG_RUN_ARRAY_CG. This run context will be utilized by a new BPF helper
giving access to this user-provided cookie value from inside a BPF program.
Generic perf_event BPF programs will access this value from perf_event itself
through passed in BPF program context.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/bpf/20210815070609.987780-6-andrii@kernel.org
2021-08-17 00:45:07 +02:00
..
accessibility TTY / Serial patches for 5.14-rc1 2021-07-05 14:08:24 -07:00
acpi Revert "ACPICA: Fix memory leak caused by _CID repair function" 2021-08-03 18:14:44 +02:00
amba
android
ata libata-5.14-2021-07-30 2021-07-30 10:56:47 -07:00
atm atm: horizon: Fix spelling mistakes in TX comment 2021-08-08 12:58:42 +01:00
auxdisplay
base firmware_loader: fix use-after-free in firmware_fallback_sysfs 2021-07-29 17:22:15 +02:00
bcma
block block-5.14-2021-08-07 2021-08-07 10:26:21 -07:00
bluetooth TTY / Serial patches for 5.14-rc1 2021-07-05 14:08:24 -07:00
bus Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
cdrom block: remove REQ_OP_SCSI_{IN,OUT} 2021-06-30 15:34:19 -06:00
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
clk A collection of clk driver fixes and one core clk API fix 2021-08-03 09:26:09 -07:00
clocksource This round has a diffstat dominated by Qualcomm clk drivers. Honestly though 2021-07-01 13:26:16 -07:00
comedi Staging / IIO driver patches for 5.14-rc1 2021-07-05 14:01:53 -07:00
connector
counter counter: interrupt-cnt: Add const qualifier for actions_list array 2021-06-13 17:00:18 +01:00
cpufreq cpufreq: Fix fall-through warning for Clang 2021-07-13 11:53:07 -05:00
cpuidle cpuidle: teo: Rename two local variables in teo_select() 2021-08-03 15:18:57 +02:00
crypto ARM: SoC changes for 5.14 2021-07-10 09:22:44 -07:00
cxl cxl/pci: Rename CXL REGLOC ID 2021-06-17 17:37:18 -07:00
dax fs: remove noop_set_page_dirty() 2021-06-29 10:53:48 -07:00
dca
devfreq PM / devfreq: passive: Fix get_target_freq when not using required-opp 2021-06-24 10:37:35 +09:00
dio
dma dmaengine fixes for v5.14 2021-08-06 11:08:24 -07:00
dma-buf Short summary of fixes pull: 2021-07-13 15:15:17 +02:00
edac EDAC/igen6: fix core dependency AGAIN 2021-07-15 11:59:59 -07:00
eisa
extcon Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
firewire Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
firmware tee: Improve support for kexec and kdump 2021-08-02 14:35:18 +02:00
fpga fpga: dfl: fme: Fix cpu hotplug issue in performance reporting 2021-07-27 11:05:16 -07:00
fsi
gnss
gpio gpio: tqmx86: really make IRQ optional 2021-08-02 17:17:27 +02:00
gpu Short summary of fixes pull: 2021-08-13 06:37:40 +10:00
greybus
hid HID: ft260: fix device removal due to USB disconnect 2021-07-29 12:38:32 +02:00
hsi
hv Drivers: hv: vmbus: Fix duplicate CPU assignments within a device 2021-07-19 09:26:31 +00:00
hwmon Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
hwspinlock
hwtracing Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
i2c i2c: mpc: Poll for MCF 2021-07-20 22:32:01 +02:00
i3c I3C for 5.14 2021-07-10 11:53:06 -07:00
idle intel_idle: Adjust the SKX C6 parameters if PC6 is disabled 2021-06-09 17:51:07 +02:00
iio Staging / IIO driver patches for 5.14-rc1 2021-07-05 14:01:53 -07:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
input This pull request contains the following changes for UML: 2021-07-09 10:19:13 -07:00
interconnect interconnect: Fix undersized devress_alloc allocation 2021-08-02 12:25:00 +03:00
iommu fallthrough fixes for Clang for 5.14-rc2 2021-07-15 13:57:31 -07:00
ipack TTY / Serial patches for 5.14-rc1 2021-07-05 14:08:24 -07:00
irqchip irqchip fixes for 5.14, take #1 2021-07-09 15:35:13 +02:00
isdn TTY / Serial patches for 5.14-rc1 2021-07-05 14:08:24 -07:00
leds This contains quite a lot of fixes, with more fixes in my inbox that 2021-07-03 11:57:42 -07:00
lightnvm
macintosh
mailbox mbox: add polarfire soc system controller mailbox 2021-06-26 12:06:48 -05:00
mcb mcb: Use DEFINE_RES_MEM() helper macro and fix the end address 2021-06-24 15:56:25 +02:00
md block-5.14-2021-08-07 2021-08-07 10:26:21 -07:00
media bpf: Allow to specify user-provided bpf_cookie for BPF perf links 2021-08-17 00:45:07 +02:00
memory Memory controller drivers for v5.14 - Tegra SoC, part two 2021-06-16 17:36:30 -07:00
memstick for-5.14/block-2021-06-29 2021-06-30 12:12:56 -07:00
message scsi: message: mptfc: Switch from pci_ to dma_ API 2021-06-22 23:00:01 -04:00
mfd Driver core changes for 5.14-rc1 2021-07-05 13:51:41 -07:00
misc Merge tag 'at24-fixes-for-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-current 2021-07-20 22:28:56 +02:00
mmc MMC core: 2021-07-22 09:51:38 -07:00
most
mtd mtd: cfi_util: Fix unreachable code issue 2021-07-12 11:15:28 -05:00
mux
net bpf: Refactor BPF_PROG_RUN into a function 2021-08-17 00:45:07 +02:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-07-31 09:14:46 -07:00
ntb
nubus
nvdimm cxl for 5.14 2021-07-04 11:55:13 -07:00
nvme block-5.14-2021-07-24 2021-07-24 12:57:06 -07:00
nvmem Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
of Devicetree updates for v5.14: 2021-07-03 10:54:08 -07:00
opp opp: Allow required-opps to be used for non genpd use cases 2021-06-18 09:00:55 +05:30
parisc kernel.h: split out panic and oops helpers 2021-07-01 11:06:04 -07:00
parport
pci PCI: Fix fall-through warning for Clang 2021-07-13 13:59:12 -05:00
pcmcia pcmcia: i82092: fix a null pointer dereference bug 2021-07-23 08:08:54 +02:00
perf drivers/perf: fix the missed ida_simple_remove() in ddr_perf_probe() 2021-06-17 19:45:24 +01:00
phy USB / Thunderbolt patches for 5.14-rc1 2021-07-05 14:16:22 -07:00
pinctrl This is the bulk of pin control changes for the v5.14 kernel: 2021-07-01 16:57:14 -07:00
platform platform/x86: pcengines-apuv2: Add missing terminating entries to gpio-lookup tables 2021-08-06 14:04:43 +02:00
pnp Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
power power: supply: Fix fall-through warnings for Clang 2021-07-13 14:50:47 -05:00
powercap
pps
ps3 powerpc/ps3: Warn on PS3 device errors 2021-06-10 21:44:58 +10:00
ptp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
pwm pwm: ep93xx: Ensure configuring period and duty_cycle isn't wrongly skipped 2021-07-08 16:09:30 +02:00
rapidio
ras
regulator regulator: Fixes for v5.14 2021-07-21 12:37:49 -07:00
remoteproc remoteproc updates for v5.14 2021-07-07 10:50:03 -07:00
reset ARM: Drivers for 5.14 2021-07-10 09:46:20 -07:00
rpmsg rpmsg: core: Add driver_data for rpmsg_device_id 2021-06-18 13:13:40 -07:00
rtc RTC for 5.14 2021-07-10 16:19:10 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
sbus
scsi SCSI fixes on 20210804 2021-08-04 12:41:30 -07:00
sh
siox siox: Simplify error handling via dev_err_probe() 2021-06-24 15:46:34 +02:00
slimbus
soc soc: ixp4xx/qmgr: fix invalid __iomem access 2021-08-03 10:16:34 +02:00
soundwire Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
spi spi: Fixes for v5.14 2021-08-06 11:15:02 -07:00
spmi spmi: hisi-spmi-controller: move driver from staging 2021-06-25 10:02:05 +02:00
ssb ssb: use DEVICE_ATTR_ADMIN_RW() helper macro 2021-06-15 13:11:56 +03:00
staging Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
target scsi: target: Fix NULL dereference on XCOPY completion 2021-07-20 23:18:22 -04:00
tc
tee tee: Correct inappropriate usage of TEE_SHM_DMA_BUF flag 2021-07-21 07:55:50 +02:00
thermal - Add rk3568 sensor support (Finley Xiao) 2021-07-10 11:43:25 -07:00
thunderbolt Revert "thunderbolt: Hide authorized attribute if router does not support PCIe tunnels" 2021-07-27 18:14:25 +02:00
tty Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
uio
usb usb: typec: tcpm: Keep other events when receiving FRS and Sourcing_vbus events 2021-08-05 12:27:43 +02:00
vdpa Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-08-13 06:41:22 -07:00
vfio VFIO update for v5.14-rc1 2021-07-03 11:49:33 -07:00
vhost vdpa: support packed virtqueue for set/get_vq_state() 2021-07-08 07:49:01 -04:00
video drm fixes for 5.14-rc2 2021-07-16 11:14:54 -07:00
virt virt: acrn: Do hcall_destroy_vm() before resource release 2021-07-27 16:48:45 +02:00
virtio virtio,vhost,vdpa: features, fixes 2021-07-09 11:06:29 -07:00
visorbus
vlynq
vme
w1
watchdog linux-watchdog 5.14-rc1 tag 2021-07-07 12:57:46 -07:00
xen xen: branch for v5.14-rc1 2021-07-07 11:07:13 -07:00
zorro
Kconfig ide: remove the legacy ide driver 2021-06-16 08:53:58 -06:00
Makefile hyperv-next for 5.14 2021-06-29 11:21:35 -07:00