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Message-Id: <1643106363-20246-1-git-send-email-baowen.zheng@corigine.com>
Date: Tue, 25 Jan 2022 18:26:03 +0800
From: Baowen Zheng <baowen.zheng@...igine.com>
To: David Ahern <dsahern@...il.com>
Cc: netdev@...r.kernel.org, oss-drivers@...igine.com, jhs@...atatu.com,
baowen zheng <baowen.zheng@...igine.com>,
Simon Horman <simon.horman@...igine.com>
Subject: [PATCH iproute2-next v1] tc: add skip_hw and skip_sw to control action offload
Add skip_hw and skip_sw flags for user to control whether
offload action to hardware.
Also we add hw_count to show how many hardwares accept to offload
the action.
Change man page to describe the usage of skip_sw and skip_hw flag.
An example to add and query action as below.
$ tc actions add action police rate 1mbit burst 100k index 100 skip_sw
$ tc -s -d actions list action police
total acts 1
action order 0: police 0x64 rate 1Mbit burst 100Kb mtu 2Kb action reclassify overhead 0b linklayer ethernet
ref 1 bind 0 installed 2 sec used 2 sec
Action statistics:
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
skip_sw in_hw in_hw_count 1
used_hw_stats delayed
Signed-off-by: baowen zheng <baowen.zheng@...igine.com>
Signed-off-by: Simon Horman <simon.horman@...igine.com>
---
man/man8/tc-actions.8 | 24 ++++++++++++++++++++
tc/m_action.c | 63 +++++++++++++++++++++++++++++++++++++++++++--------
2 files changed, 77 insertions(+), 10 deletions(-)
diff --git a/man/man8/tc-actions.8 b/man/man8/tc-actions.8
index 6f1c201..5c399cd 100644
--- a/man/man8/tc-actions.8
+++ b/man/man8/tc-actions.8
@@ -52,6 +52,8 @@ actions \- independently defined actions in tc
.I HWSTATSSPEC
] [
.I CONTROL
+] [
+.I SKIPSPEC
]
.I ACTISPEC
@@ -99,6 +101,11 @@ Time since last update.
.IR reclassify " | " pipe " | " drop " | " continue " | " ok
}
+.I SKIPSPEC
+:= {
+.IR skip_sw " | " skip_hw
+}
+
.I TC_OPTIONS
These are the options that are specific to
.B tc
@@ -270,6 +277,23 @@ Return to the calling qdisc for packet processing, and end classification of
this packet.
.RE
+.TP
+.I SKIPSPEC
+The
+.I SKIPSPEC
+indicates how
+.B tc
+should proceed when executing the action. Any of the following are valid:
+.RS
+.TP
+.B skip_sw
+Do not process action by software. If hardware has no offload support for this
+action, operation will fail.
+.TP
+.B skip_hw
+Do not process action by hardware.
+.RE
+
.SH SEE ALSO
.BR tc (8),
.BR tc-bpf (8),
diff --git a/tc/m_action.c b/tc/m_action.c
index b16882a..b9fed6f 100644
--- a/tc/m_action.c
+++ b/tc/m_action.c
@@ -51,9 +51,10 @@ static void act_usage(void)
" FL := ls | list | flush | <ACTNAMESPEC>\n"
" ACTNAMESPEC := action <ACTNAME>\n"
" ACTISPEC := <ACTNAMESPEC> <INDEXSPEC>\n"
- " ACTSPEC := action <ACTDETAIL> [INDEXSPEC] [HWSTATSSPEC]\n"
+ " ACTSPEC := action <ACTDETAIL> [INDEXSPEC] [HWSTATSSPEC] [SKIPSPEC]\n"
" INDEXSPEC := index <32 bit indexvalue>\n"
" HWSTATSSPEC := hw_stats [ immediate | delayed | disabled ]\n"
+ " SKIPSPEC := [ skip_sw | skip_hw ]\n"
" ACTDETAIL := <ACTNAME> <ACTPARAMS>\n"
" Example ACTNAME is gact, mirred, bpf, etc\n"
" Each action has its own parameters (ACTPARAMS)\n"
@@ -210,12 +211,14 @@ int parse_action(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
struct rtattr *tail, *tail2;
char k[FILTER_NAMESZ];
int act_ck_len = 0;
+ __u32 flag = 0;
int ok = 0;
int eap = 0; /* expect action parameters */
int ret = 0;
int prio = 0;
unsigned char act_ck[TC_COOKIE_MAX_SIZE];
+ int skip_loop = 2;
if (argc <= 0)
return -1;
@@ -314,13 +317,27 @@ done0:
}
if (*argv && strcmp(*argv, "no_percpu") == 0) {
+ flag |= TCA_ACT_FLAGS_NO_PERCPU_STATS;
+ NEXT_ARG_FWD();
+ }
+
+ /* we need to parse twice to fix skip flag out of order */
+ while (skip_loop--) {
+ if (*argv && strcmp(*argv, "skip_sw") == 0) {
+ flag |= TCA_ACT_FLAGS_SKIP_SW;
+ NEXT_ARG_FWD();
+ } else if (*argv && strcmp(*argv, "skip_hw") == 0) {
+ flag |= TCA_ACT_FLAGS_SKIP_HW;
+ NEXT_ARG_FWD();
+ }
+ }
+
+ if (flag) {
struct nla_bitfield32 flags =
- { TCA_ACT_FLAGS_NO_PERCPU_STATS,
- TCA_ACT_FLAGS_NO_PERCPU_STATS };
+ { flag, flag };
addattr_l(n, MAX_MSG, TCA_ACT_FLAGS, &flags,
sizeof(struct nla_bitfield32));
- NEXT_ARG_FWD();
}
addattr_nest_end(n, tail);
@@ -396,13 +413,39 @@ static int tc_print_one_action(FILE *f, struct rtattr *arg)
strsz, b1, sizeof(b1)));
print_nl();
}
- if (tb[TCA_ACT_FLAGS]) {
- struct nla_bitfield32 *flags = RTA_DATA(tb[TCA_ACT_FLAGS]);
+ if (tb[TCA_ACT_FLAGS] || tb[TCA_ACT_IN_HW_COUNT]) {
+ bool skip_hw = false;
+ if (tb[TCA_ACT_FLAGS]) {
+ struct nla_bitfield32 *flags = RTA_DATA(tb[TCA_ACT_FLAGS]);
+
+ if (flags->selector & TCA_ACT_FLAGS_NO_PERCPU_STATS)
+ print_bool(PRINT_ANY, "no_percpu", "\tno_percpu",
+ flags->value &
+ TCA_ACT_FLAGS_NO_PERCPU_STATS);
+ if (flags->selector & TCA_ACT_FLAGS_SKIP_HW) {
+ print_bool(PRINT_ANY, "skip_hw", "\tskip_hw",
+ flags->value &
+ TCA_ACT_FLAGS_SKIP_HW);
+ skip_hw = !!(flags->value & TCA_ACT_FLAGS_SKIP_HW);
+ }
+ if (flags->selector & TCA_ACT_FLAGS_SKIP_SW)
+ print_bool(PRINT_ANY, "skip_sw", "\tskip_sw",
+ flags->value &
+ TCA_ACT_FLAGS_SKIP_SW);
+ }
+ if (tb[TCA_ACT_IN_HW_COUNT] && !skip_hw) {
+ __u32 count = rta_getattr_u32(tb[TCA_ACT_IN_HW_COUNT]);
+ if (count) {
+ print_bool(PRINT_ANY, "in_hw", "\tin_hw",
+ true);
+ print_uint(PRINT_ANY, "in_hw_count",
+ " in_hw_count %u", count);
+ } else {
+ print_bool(PRINT_ANY, "not_in_hw",
+ "\tnot_in_hw", true);
+ }
+ }
- if (flags->selector & TCA_ACT_FLAGS_NO_PERCPU_STATS)
- print_bool(PRINT_ANY, "no_percpu", "\tno_percpu",
- flags->value &
- TCA_ACT_FLAGS_NO_PERCPU_STATS);
print_nl();
}
if (tb[TCA_ACT_HW_STATS])
--
1.8.3.1
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