1e12d3ef47
BPF struct_ops programs currently cannot be marked as sleepable. This need not be the case -- struct_ops programs can be sleepable, and e.g. invoke kfuncs that export the KF_SLEEPABLE flag. So as to allow future struct_ops programs to invoke such kfuncs, this patch updates the verifier to allow struct_ops programs to be sleepable. A follow-on patch will add support to libbpf for specifying struct_ops.s as a sleepable struct_ops program, and then another patch will add testcases to the dummy_st_ops selftest suite which test sleepable struct_ops behavior. Signed-off-by: David Vernet <void@manifault.com> Link: https://lore.kernel.org/r/20230125164735.785732-2-void@manifault.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
{
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"sleepable fentry accept",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_TRACING,
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.expected_attach_type = BPF_TRACE_FENTRY,
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.kfunc = "bpf_fentry_test1",
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.result = ACCEPT,
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.flags = BPF_F_SLEEPABLE,
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.runs = -1,
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},
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{
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"sleepable fexit accept",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_TRACING,
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.expected_attach_type = BPF_TRACE_FENTRY,
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.kfunc = "bpf_fentry_test1",
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.result = ACCEPT,
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.flags = BPF_F_SLEEPABLE,
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.runs = -1,
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},
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{
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"sleepable fmod_ret accept",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_TRACING,
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.expected_attach_type = BPF_MODIFY_RETURN,
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.kfunc = "bpf_fentry_test1",
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.result = ACCEPT,
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.flags = BPF_F_SLEEPABLE,
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.runs = -1,
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},
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{
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"sleepable iter accept",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_TRACING,
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.expected_attach_type = BPF_TRACE_ITER,
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.kfunc = "task",
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.result = ACCEPT,
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.flags = BPF_F_SLEEPABLE,
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.runs = -1,
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},
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{
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"sleepable lsm accept",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_LSM,
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.kfunc = "bpf",
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.expected_attach_type = BPF_LSM_MAC,
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.result = ACCEPT,
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.flags = BPF_F_SLEEPABLE,
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.runs = -1,
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},
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{
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"sleepable uprobe accept",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_KPROBE,
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.kfunc = "bpf_fentry_test1",
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.result = ACCEPT,
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.flags = BPF_F_SLEEPABLE,
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.runs = -1,
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},
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{
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"sleepable raw tracepoint reject",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.prog_type = BPF_PROG_TYPE_TRACING,
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.expected_attach_type = BPF_TRACE_RAW_TP,
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.kfunc = "sched_switch",
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.result = REJECT,
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.errstr = "Only fentry/fexit/fmod_ret, lsm, iter, uprobe, and struct_ops programs can be sleepable",
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.flags = BPF_F_SLEEPABLE,
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.runs = -1,
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},
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