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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-05 09:13:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-05 09:13:07 -0700
commit0cdf6d4607df37804955530e153cee2d363c426e (patch)
tree202d7d60f31cbf09b111e51210c663af580d1fca /tools/include/uapi/linux/bpf.h
parentb9fb1fc7f921e4f52bc753d9147d1b6be6d0b675 (diff)
parentce03b6d2b610b70bb527d14d82c2394adb235e5d (diff)
download96b-common-0cdf6d4607df37804955530e153cee2d363c426e.tar.gz
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner: "A set of fixes for perf: Kernel side: - Fix the hardcoded index of extra PCI devices on Broadwell which caused a resource conflict and triggered warnings on CPU hotplug. Tooling: - Update the tools copy of several files, including perf_event.h, powerpc's asm/unistd.h (new io_pgetevents syscall), bpf.h and x86's memcpy_64.s (used in 'perf bench mem'), silencing the respective warnings during the perf tools build. - Fix the build on the alpine:edge distro" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/uncore: Fix hardcoded index of Broadwell extra PCI devices perf tools: Fix the build on the alpine:edge distro tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy' tools headers uapi: Refresh linux/bpf.h copy tools headers powerpc: Update asm/unistd.h copy to pick new tools headers uapi: Update tools's copy of linux/perf_event.h
Diffstat (limited to 'tools/include/uapi/linux/bpf.h')
-rw-r--r--tools/include/uapi/linux/bpf.h28
1 files changed, 23 insertions, 5 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 59b19b6a40d7..b7db3261c62d 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -1857,7 +1857,8 @@ union bpf_attr {
* is resolved), the nexthop address is returned in ipv4_dst
* or ipv6_dst based on family, smac is set to mac address of
* egress device, dmac is set to nexthop mac address, rt_metric
- * is set to metric from route (IPv4/IPv6 only).
+ * is set to metric from route (IPv4/IPv6 only), and ifindex
+ * is set to the device index of the nexthop from the FIB lookup.
*
* *plen* argument is the size of the passed in struct.
* *flags* argument can be a combination of one or more of the
@@ -1873,9 +1874,10 @@ union bpf_attr {
* *ctx* is either **struct xdp_md** for XDP programs or
* **struct sk_buff** tc cls_act programs.
* Return
- * Egress device index on success, 0 if packet needs to continue
- * up the stack for further processing or a negative error in case
- * of failure.
+ * * < 0 if any input argument is invalid
+ * * 0 on success (packet is forwarded, nexthop neighbor exists)
+ * * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the
+ * * packet is not forwarded or needs assist from full stack
*
* int bpf_sock_hash_update(struct bpf_sock_ops_kern *skops, struct bpf_map *map, void *key, u64 flags)
* Description
@@ -2612,6 +2614,18 @@ struct bpf_raw_tracepoint_args {
#define BPF_FIB_LOOKUP_DIRECT BIT(0)
#define BPF_FIB_LOOKUP_OUTPUT BIT(1)
+enum {
+ BPF_FIB_LKUP_RET_SUCCESS, /* lookup successful */
+ BPF_FIB_LKUP_RET_BLACKHOLE, /* dest is blackholed; can be dropped */
+ BPF_FIB_LKUP_RET_UNREACHABLE, /* dest is unreachable; can be dropped */
+ BPF_FIB_LKUP_RET_PROHIBIT, /* dest not allowed; can be dropped */
+ BPF_FIB_LKUP_RET_NOT_FWDED, /* packet is not forwarded */
+ BPF_FIB_LKUP_RET_FWD_DISABLED, /* fwding is not enabled on ingress */
+ BPF_FIB_LKUP_RET_UNSUPP_LWT, /* fwd requires encapsulation */
+ BPF_FIB_LKUP_RET_NO_NEIGH, /* no neighbor entry for nh */
+ BPF_FIB_LKUP_RET_FRAG_NEEDED, /* fragmentation required to fwd */
+};
+
struct bpf_fib_lookup {
/* input: network family for lookup (AF_INET, AF_INET6)
* output: network family of egress nexthop
@@ -2625,7 +2639,11 @@ struct bpf_fib_lookup {
/* total length of packet from network header - used for MTU check */
__u16 tot_len;
- __u32 ifindex; /* L3 device index for lookup */
+
+ /* input: L3 device index for lookup
+ * output: device index from FIB lookup
+ */
+ __u32 ifindex;
union {
/* inputs to lookup */