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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asm-generic	vfs: add faccessat2 syscall	2020-05-14 16:44:25 +02:00
drm	drm: Generalized NV Block Linear DRM format mod	2020-05-22 10:53:33 +10:00
linux	bpf: Devmap adjust uapi for attach bpf program	2020-06-09 11:36:18 -07:00
misc	crypto: hisilicon - register zip engine to uacce	2020-02-22 09:25:42 +08:00
mtd	mtd: abi: do not use C++ style comments in uapi header	2019-07-07 20:31:29 +02:00
rdma	docs: fix broken references to text files	2020-04-20 15:35:59 -06:00
scsi	uapi: revert flexible-array conversions	2020-05-04 11:30:15 -05:00
sound	Revert "ALSA: uapi: Drop asound.h inclusion from asoc.h"	2020-03-31 11:01:12 +02:00
video	…
xen	…
Kbuild	kbuild: re-implement Makefile.headersinst without recursion	2019-06-15 19:57:02 +09:00