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chore/docs: support to unroll route loop and update troubleshooting.md (#158)

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This commit is contained in:
mzz
2023-06-27 10:04:07 +08:00
committed by GitHub
parent 5508c372c8
commit d60e644e0c
3 changed files with 34 additions and 11 deletions
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20
control/kern/tproxy.c
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@ -19,6 +19,7 @@
// #define __PRINT_ROUTING_RESULT
// #define __PRINT_SETUP_PROCESS_CONNNECTION
// #define __REMOVE_BPF_PRINTK
// #define __UNROLL_ROUTE_LOOP
// #define likely(x) x
// #define unlikely(x) x
@ -137,7 +138,7 @@ struct routing_result {
__u32 pid;
};
struct dst_routing_result {
struct __attribute__((packed)) dst_routing_result {
__be32 ip[4];
__be16 port;
__u16 recognize;
@ -1005,7 +1006,9 @@ route(const __u32 flag[6], const void *l4hdr, const __be32 saddr[4],
// Unroll can give less instructions but more memory consumption when loading.
// We disable it here to support more poor memory devices.
// #pragma unroll
#ifdef __UNROLL_ROUTE_LOOP
#pragma unroll
#endif
for (__u32 i = 0; i < MAX_MATCH_SET_LEN; i++) {
__u32 k = i; // Clone to pass code checker.
match_set = bpf_map_lookup_elem(&routing_map, &k);
@ -1016,8 +1019,9 @@ route(const __u32 flag[6], const void *l4hdr, const __be32 saddr[4],
#ifdef __DEBUG_ROUTING
key = match_set->type;
bpf_printk("key(match_set->type): %llu", key);
bpf_printk("Skip to judge. bad_rule: %d, good_subrule: %d", isdns_must_goodsubrule_badrule&0b10,
isdns_must_goodsubrule_badrule&0b1);
bpf_printk("Skip to judge. bad_rule: %d, good_subrule: %d",
isdns_must_goodsubrule_badrule & 0b10,
isdns_must_goodsubrule_badrule & 0b1);
#endif
goto before_next_loop;
}
@ -1103,7 +1107,9 @@ route(const __u32 flag[6], const void *l4hdr, const __be32 saddr[4],
before_next_loop:
#ifdef __DEBUG_ROUTING
bpf_printk("good_subrule: %d, bad_rule: %d", isdns_must_goodsubrule_badrule&0b10, isdns_must_goodsubrule_badrule&0b1);
bpf_printk("good_subrule: %d, bad_rule: %d",
isdns_must_goodsubrule_badrule & 0b10,
isdns_must_goodsubrule_badrule & 0b1);
#endif
if (match_set->outbound != OUTBOUND_LOGICAL_OR) {
// This match_set reaches the end of subrule.
@ -1119,7 +1125,7 @@ route(const __u32 flag[6], const void *l4hdr, const __be32 saddr[4],
isdns_must_goodsubrule_badrule &= ~0b10;
}
#ifdef __DEBUG_ROUTING
bpf_printk("_bad_rule: %d", isdns_must_goodsubrule_badrule&0b1);
bpf_printk("_bad_rule: %d", isdns_must_goodsubrule_badrule & 0b1);
#endif
if ((match_set->outbound & OUTBOUND_LOGICAL_MASK) !=
OUTBOUND_LOGICAL_MASK) {
@ -2065,7 +2071,7 @@ static int __always_inline _update_map_elem_by_cookie(const __u64 cookie) {
We extract "sddm-helper" from it.
*/
unsigned long loc, j, last_slash = -1;
#pragma unroll
#pragma unroll
for (loc = 0, j = 0; j < MAX_ARG_LEN_TO_PROBE;
++j, loc = ((loc + 1) & (MAX_ARG_SCANNER_BUFFER_SIZE - 1))) {
// volatile unsigned long k = j; // Cheat to unroll.