For passing device functions for offloaded eBPF programs, there used to be no place where to store the pointer without making the non-offloaded programs pay a memory price.
As a consequence, three functions were called with ndo_bpf() through specific commands. Now that we have struct bpf_offload_dev, and since none of those operations rely on RTNL, we can turn these three commands into hooks inside the struct bpf_prog_offload_ops, and pass them as part of bpf_offload_dev_create(). This patch set changes the offload architecture to do so, and brings the relevant changes to the nfp and netdevsim drivers. Quentin Monnet (9): nfp: bpf: move nfp_bpf_analyzer_ops from verifier.c to offload.c bpf: pass a struct with offload callbacks to bpf_offload_dev_create() bpf: call verify_insn from its callback in struct bpf_offload_dev bpf: call finalize() from its callback in struct bpf_offload_dev bpf: call verifier_prep from its callback in struct bpf_offload_dev bpf: pass translate() as a callback and remove its ndo_bpf subcommand bpf: pass destroy() as a callback and remove its ndo_bpf subcommand bpf: pass prog instead of env to bpf_prog_offload_verifier_prep() bpf: do not pass netdev to translate() and prepare() offload callbacks drivers/net/ethernet/netronome/nfp/bpf/main.c | 2 +- drivers/net/ethernet/netronome/nfp/bpf/main.h | 6 +- .../net/ethernet/netronome/nfp/bpf/offload.c | 34 ++++----- .../net/ethernet/netronome/nfp/bpf/verifier.c | 11 +-- drivers/net/netdevsim/bpf.c | 51 +++++++------ include/linux/bpf.h | 8 +- include/linux/bpf_verifier.h | 2 +- include/linux/netdevice.h | 12 --- kernel/bpf/offload.c | 75 +++++++------------ kernel/bpf/verifier.c | 2 +- 10 files changed, 85 insertions(+), 118 deletions(-) -- 2.17.1
