Jesper Dangaard Brouer 281920b7e0 bpf: Devmap adjust uapi for attach bpf program ... V2: - Defer changing BPF-syscall to start at file-descriptor 1 - Use {} to zero initialise struct. The recent commit fbee97feed ("bpf: Add support to attach bpf program to a devmap entry"), introduced ability to attach (and run) a separate XDP bpf_prog for each devmap entry. A bpf_prog is added via a file-descriptor. As zero were a valid FD, not using the feature requires using value minus-1. The UAPI is extended via tail-extending struct bpf_devmap_val and using map->value_size to determine the feature set. This will break older userspace applications not using the bpf_prog feature. Consider an old userspace app that is compiled against newer kernel uapi/bpf.h, it will not know that it need to initialise the member bpf_prog.fd to minus-1. Thus, users will be forced to update source code to get program running on newer kernels. This patch remove the minus-1 checks, and have zero mean feature isn't used. Followup patches either for kernel or libbpf should handle and avoid returning file-descriptor zero in the first place. Fixes: fbee97feed ("bpf: Add support to attach bpf program to a devmap entry") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/159170950687.2102545.7235914718298050113.stgit@firesoul		2020-06-09 11:36:18 -07:00
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acpi	Merge branches 'acpi-apei', 'acpi-pmic', 'acpi-video' and 'acpi-dptf'	2020-06-01 17:19:43 +02:00
asm-generic	ARM:	2020-06-03 15:13:47 -07:00
clocksource
crypto	crypto: lib/sha1 - fold linux/cryptohash.h into crypto/sha.h	2020-05-08 15:32:17 +10:00
drm	drm pull for 5.8-rc1	2020-06-02 15:04:15 -07:00
dt-bindings
keys
kunit
kvm	KVM: arm64: vgic-v3: Take cpu_if pointer directly instead of vcpu	2020-05-28 11:57:10 +01:00
linux	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
math-emu
media
misc
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
pcmcia
ras
rdma	RDMA/core: Fix double destruction of uobject	2020-05-27 14:22:57 -03:00
scsi
soc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-05-06 22:10:13 -07:00
sound	ALSA: rawmidi: Fix racy buffer resize under concurrent accesses	2020-05-07 22:29:14 +02:00
target
trace	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-06-03 16:27:18 -07:00
uapi	bpf: Devmap adjust uapi for attach bpf program	2020-06-09 11:36:18 -07:00
vdso
video
xen