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9c395c1b99
This patch adds special BPF_RB_{ROOT,NODE} btf_field_types similar to
BPF_LIST_{HEAD,NODE}, adds the necessary plumbing to detect the new
types, and adds bpf_rb_root_free function for freeing bpf_rb_root in
map_values.
structs bpf_rb_root and bpf_rb_node are opaque types meant to
obscure structs rb_root_cached rb_node, respectively.
btf_struct_access will prevent BPF programs from touching these special
fields automatically now that they're recognized.
btf_check_and_fixup_fields now groups list_head and rb_root together as
"graph root" fields and {list,rb}_node as "graph node", and does same
ownership cycle checking as before. Note that this function does _not_
prevent ownership type mixups (e.g. rb_root owning list_node) - that's
handled by btf_parse_graph_root.
After this patch, a bpf program can have a struct bpf_rb_root in a
map_value, but not add anything to nor do anything useful with it.
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Link: https://lore.kernel.org/r/20230214004017.2534011-2-davemarchevsky@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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| .. | ||
| alsa | ||
| amd-pstate | ||
| arm64 | ||
| bpf | ||
| breakpoints | ||
| capabilities | ||
| cgroup | ||
| clone3 | ||
| core | ||
| cpu-hotplug | ||
| cpufreq | ||
| damon | ||
| dma | ||
| dmabuf-heaps | ||
| drivers | ||
| efivarfs | ||
| exec | ||
| filesystems | ||
| firmware | ||
| fpu | ||
| ftrace | ||
| futex | ||
| gpio | ||
| ia64 | ||
| intel_pstate | ||
| iommu | ||
| ipc | ||
| ir | ||
| kcmp | ||
| kexec | ||
| kmod | ||
| kselftest | ||
| kvm | ||
| landlock | ||
| lib | ||
| livepatch | ||
| lkdtm | ||
| locking | ||
| media_tests | ||
| membarrier | ||
| memfd | ||
| memory-hotplug | ||
| mincore | ||
| mount | ||
| mount_setattr | ||
| move_mount_set_group | ||
| mqueue | ||
| nci | ||
| net | ||
| netfilter | ||
| nolibc | ||
| nsfs | ||
| ntb | ||
| openat2 | ||
| perf_events | ||
| pid_namespace | ||
| pidfd | ||
| powerpc | ||
| prctl | ||
| proc | ||
| pstore | ||
| ptp | ||
| ptrace | ||
| rcutorture | ||
| resctrl | ||
| rlimits | ||
| rseq | ||
| rtc | ||
| safesetid | ||
| sched | ||
| seccomp | ||
| sgx | ||
| sigaltstack | ||
| size | ||
| sparc64 | ||
| splice | ||
| static_keys | ||
| sync | ||
| syscall_user_dispatch | ||
| sysctl | ||
| tc-testing | ||
| tdx | ||
| timens | ||
| timers | ||
| tmpfs | ||
| tpm2 | ||
| uevent | ||
| user | ||
| user_events | ||
| vDSO | ||
| vm | ||
| watchdog | ||
| wireguard | ||
| x86 | ||
| zram | ||
| .gitignore | ||
| gen_kselftest_tar.sh | ||
| kselftest.h | ||
| kselftest_deps.sh | ||
| kselftest_harness.h | ||
| kselftest_install.sh | ||
| kselftest_module.h | ||
| lib.mk | ||
| Makefile | ||
| run_kselftest.sh | ||