linux-stable/include
Florent Revest 7b15523a98 bpf: Add a bpf_snprintf helper
The implementation takes inspiration from the existing bpf_trace_printk
helper but there are a few differences:

To allow for a large number of format-specifiers, parameters are
provided in an array, like in bpf_seq_printf.

Because the output string takes two arguments and the array of
parameters also takes two arguments, the format string needs to fit in
one argument. Thankfully, ARG_PTR_TO_CONST_STR is guaranteed to point to
a zero-terminated read-only map so we don't need a format string length
arg.

Because the format-string is known at verification time, we also do
a first pass of format string validation in the verifier logic. This
makes debugging easier.

Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210419155243.1632274-4-revest@chromium.org
2021-04-19 15:27:36 -07:00
..
acpi IOMMU Updates for Linux v5.12 2021-02-22 10:31:29 -08:00
asm-generic RISC-V Patches for the 5.12 Merge Window 2021-02-26 10:28:35 -08:00
clocksource
crypto Keyrings miscellany 2021-02-23 16:09:23 -08:00
drm drm/ttm: make ttm_bo_unpin more defensive 2021-03-15 16:02:30 +01:00
dt-bindings RISC-V Patches for the 5.12 Merge Window 2021-02-26 10:28:35 -08:00
keys
kunit
kvm KVM: arm64: Turn kvm_arm_support_pmu_v3() into a static key 2021-03-06 04:18:40 -05:00
linux bpf: Add a bpf_snprintf helper 2021-04-19 15:27:36 -07:00
math-emu
media media: rc: compile rc-cec.c into rc-core 2021-03-11 11:40:28 +01:00
memory
misc
net skmsg: Pass psock pointer to ->psock_update_sk_prot() 2021-04-12 17:34:27 +02:00
pcmcia
ras
rdma
scsi
soc net: ocelot: replay switchdev events when joining bridge 2021-03-23 14:49:06 -07:00
sound ALSA/ASoC/SOF/SoundWire: fix Kconfig issues 2021-03-02 18:30:07 +01:00
target scsi: target: core: Add cmd length set before cmd complete 2021-02-22 22:21:29 -05:00
trace Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-03-25 15:31:22 -07:00
uapi bpf: Add a bpf_snprintf helper 2021-04-19 15:27:36 -07:00
vdso
video
xen Xen/gnttab: introduce common INVALID_GRANT_{HANDLE,REF} 2021-03-10 16:39:29 -06:00