diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_xdp_noinline.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_xdp_noinline.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c index 42c8f6ded0e4..fad94e41cef9 100644 --- a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c +++ b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c @@ -15,6 +15,7 @@ #include <linux/udp.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include "bpf_compiler.h" static __always_inline __u32 rol32(__u32 word, unsigned int shift) { @@ -317,6 +318,14 @@ bool encap_v6(struct xdp_md *xdp, struct ctl_value *cval, return true; } +#ifndef __clang__ +#pragma GCC push_options +/* GCC optimization collapses functions and increases the number of arguments + * beyond the compatible amount supported by BPF. + */ +#pragma GCC optimize("-fno-ipa-sra") +#endif + static __attribute__ ((noinline)) bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval, struct packet_description *pckt, @@ -362,7 +371,7 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval, iph->ttl = 4; next_iph_u16 = (__u16 *) iph; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (int i = 0; i < sizeof(struct iphdr) >> 1; i++) csum += *next_iph_u16++; iph->check = ~((csum & 0xffff) + (csum >> 16)); @@ -371,6 +380,10 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval, return true; } +#ifndef __clang__ +#pragma GCC pop_options +#endif + static __attribute__ ((noinline)) int swap_mac_and_send(void *data, void *data_end) { @@ -409,7 +422,7 @@ int send_icmp_reply(void *data, void *data_end) iph->saddr = tmp_addr; iph->check = 0; next_iph_u16 = (__u16 *) iph; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (int i = 0; i < sizeof(struct iphdr) >> 1; i++) csum += *next_iph_u16++; iph->check = ~((csum & 0xffff) + (csum >> 16)); @@ -587,12 +600,13 @@ static void connection_table_lookup(struct real_definition **real, __attribute__ ((noinline)) static int process_l3_headers_v6(struct packet_description *pckt, __u8 *protocol, __u64 off, - __u16 *pkt_bytes, void *data, - void *data_end) + __u16 *pkt_bytes, void *extra_args[2]) { struct ipv6hdr *ip6h; __u64 iph_len; int action; + void *data = extra_args[0]; + void *data_end = extra_args[1]; ip6h = data + off; if (ip6h + 1 > data_end) @@ -618,11 +632,12 @@ static int process_l3_headers_v6(struct packet_description *pckt, __attribute__ ((noinline)) static int process_l3_headers_v4(struct packet_description *pckt, __u8 *protocol, __u64 off, - __u16 *pkt_bytes, void *data, - void *data_end) + __u16 *pkt_bytes, void *extra_args[2]) { struct iphdr *iph; int action; + void *data = extra_args[0]; + void *data_end = extra_args[1]; iph = data + off; if (iph + 1 > data_end) @@ -665,13 +680,14 @@ static int process_packet(void *data, __u64 off, void *data_end, __u8 protocol; __u32 vip_num; int action; + void *extra_args[2] = { data, data_end }; if (is_ipv6) action = process_l3_headers_v6(&pckt, &protocol, off, - &pkt_bytes, data, data_end); + &pkt_bytes, extra_args); else action = process_l3_headers_v4(&pckt, &protocol, off, - &pkt_bytes, data, data_end); + &pkt_bytes, extra_args); if (action >= 0) return action; protocol = pckt.flow.proto; |