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Message-Id: <20170515084146.3698-3-jiri@resnulli.us>
Date: Mon, 15 May 2017 10:41:46 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, jhs@...atatu.com, xiyou.wangcong@...il.com,
dsa@...ulusnetworks.com, edumazet@...gle.com,
stephen@...workplumber.org, daniel@...earbox.net,
alexander.h.duyck@...el.com, simon.horman@...ronome.com,
mlxsw@...lanox.com
Subject: [patch iproute2 v2 3/3] tc/actions: introduce support for goto chain action
From: Jiri Pirko <jiri@...lanox.com>
Allow user to set control action "goto" with filter chain index as
a parameter.
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
include/linux/pkt_cls.h | 16 +++++++++++++++-
man/man8/tc-ife.8 | 2 +-
man/man8/tc-pedit.8 | 2 +-
man/man8/tc-police.8 | 2 +-
man/man8/tc-vlan.8 | 2 +-
tc/m_connmark.c | 3 ++-
tc/m_gact.c | 6 ++++--
tc/m_pedit.c | 3 ++-
tc/m_police.c | 6 ++++--
tc/m_skbmod.c | 3 ++-
tc/m_vlan.c | 3 ++-
tc/tc_util.c | 24 +++++++++++++++++++++++-
12 files changed, 58 insertions(+), 14 deletions(-)
diff --git a/include/linux/pkt_cls.h b/include/linux/pkt_cls.h
index f1129e3..1b9aa9e 100644
--- a/include/linux/pkt_cls.h
+++ b/include/linux/pkt_cls.h
@@ -37,7 +37,21 @@ enum {
#define TC_ACT_QUEUED 5
#define TC_ACT_REPEAT 6
#define TC_ACT_REDIRECT 7
-#define TC_ACT_JUMP 0x10000000
+
+/* There is a special kind of actions called "extended actions",
+ * which need a value parameter. These have a local opcode located in
+ * the highest nibble, starting from 1. The rest of the bits
+ * are used to carry the value. These two parts together make
+ * a combined opcode.
+ */
+#define __TC_ACT_EXT_SHIFT 28
+#define __TC_ACT_EXT(local) ((local) << __TC_ACT_EXT_SHIFT)
+#define TC_ACT_EXT_VAL_MASK ((1 << __TC_ACT_EXT_SHIFT) - 1)
+#define TC_ACT_EXT_CMP(combined, opcode) \
+ (((combined) & (~TC_ACT_EXT_VAL_MASK)) == opcode)
+
+#define TC_ACT_JUMP __TC_ACT_EXT(1)
+#define TC_ACT_GOTO_CHAIN __TC_ACT_EXT(2)
/* Action type identifiers*/
enum {
diff --git a/man/man8/tc-ife.8 b/man/man8/tc-ife.8
index a8f1f28..24595cc 100644
--- a/man/man8/tc-ife.8
+++ b/man/man8/tc-ife.8
@@ -34,7 +34,7 @@ IFE - encapsulate/decapsulate metadata
.ti -8
.IR CONTROL " := { "
-.BR reclassify " | " use " | " pipe " | " drop " | " continue " | " ok " }"
+.BR reclassify " | " use " | " pipe " | " drop " | " continue " | " ok " | " goto " " chain " " CHAIN_INDEX " }"
.SH DESCRIPTION
The
.B ife
diff --git a/man/man8/tc-pedit.8 b/man/man8/tc-pedit.8
index 7f482ea..de0d9e9 100644
--- a/man/man8/tc-pedit.8
+++ b/man/man8/tc-pedit.8
@@ -74,7 +74,7 @@ pedit - generic packet editor action
.ti -8
.IR CONTROL " := {"
-.BR reclassify " | " pipe " | " drop " | " shot " | " continue " | " pass " }"
+.BR reclassify " | " pipe " | " drop " | " shot " | " continue " | " pass " | " goto " " chain " " CHAIN_INDEX " }"
.SH DESCRIPTION
The
.B pedit
diff --git a/man/man8/tc-police.8 b/man/man8/tc-police.8
index 620c288..bcc5f43 100644
--- a/man/man8/tc-police.8
+++ b/man/man8/tc-police.8
@@ -30,7 +30,7 @@ police - policing action
.ti -8
.IR EXCEEDACT/NOTEXCEEDACT " := { "
-.BR pipe " | " ok " | " reclassify " | " drop " | " continue " }"
+.BR pipe " | " ok " | " reclassify " | " drop " | " continue " | " goto " " chain " " CHAIN_INDEX " }"
.SH DESCRIPTION
The
.B police
diff --git a/man/man8/tc-vlan.8 b/man/man8/tc-vlan.8
index af3de1c..59c81e8 100644
--- a/man/man8/tc-vlan.8
+++ b/man/man8/tc-vlan.8
@@ -26,7 +26,7 @@ vlan - vlan manipulation module
.ti -8
.IR CONTROL " := { "
-.BR reclassify " | " pipe " | " drop " | " continue " | " pass " }"
+.BR reclassify " | " pipe " | " drop " | " continue " | " pass " | " goto " " chain " " CHAIN_INDEX " }"
.SH DESCRIPTION
The
.B vlan
diff --git a/tc/m_connmark.c b/tc/m_connmark.c
index 3c2274b..37d7185 100644
--- a/tc/m_connmark.c
+++ b/tc/m_connmark.c
@@ -30,7 +30,8 @@ explain(void)
fprintf(stderr, "Usage: ... connmark [zone ZONE] [CONTROL] [index <INDEX>]\n");
fprintf(stderr, "where :\n"
"\tZONE is the conntrack zone\n"
- "\tCONTROL := reclassify|pipe|drop|continue|ok\n");
+ "\tCONTROL := reclassify | pipe | drop | continue | ok |\n"
+ "\t goto chain <CHAIN_INDEX>\n");
}
static void
diff --git a/tc/m_gact.c b/tc/m_gact.c
index 938b6b5..d95aa11 100644
--- a/tc/m_gact.c
+++ b/tc/m_gact.c
@@ -45,7 +45,8 @@ explain(void)
#ifdef CONFIG_GACT_PROB
fprintf(stderr, "Usage: ... gact <ACTION> [RAND] [INDEX]\n");
fprintf(stderr,
- "Where: \tACTION := reclassify | drop | continue | pass | pipe\n"
+ "Where: \tACTION := reclassify | drop | continue | pass | pipe |\n"
+ " \t goto chain <CHAIN_INDEX>\n"
"\tRAND := random <RANDTYPE> <ACTION> <VAL>\n"
"\tRANDTYPE := netrand | determ\n"
"\tVAL : = value not exceeding 10000\n"
@@ -54,7 +55,8 @@ explain(void)
#else
fprintf(stderr, "Usage: ... gact <ACTION> [INDEX]\n");
fprintf(stderr,
- "Where: \tACTION := reclassify | drop | continue | pass | pipe\n"
+ "Where: \tACTION := reclassify | drop | continue | pass | pipe |\n"
+ " \t goto chain <CHAIN_INDEX>\n"
"\tINDEX := index value used\n"
"\n");
#endif
diff --git a/tc/m_pedit.c b/tc/m_pedit.c
index 730a434..cb3bb0e 100644
--- a/tc/m_pedit.c
+++ b/tc/m_pedit.c
@@ -45,7 +45,8 @@ static void explain(void)
"\t\tCMD:= clear | invert | set <setval>| add <addval> | retain\n"
"\t<LAYERED>:= ip <ipdata> | ip6 <ip6data>\n"
" \t\t| udp <udpdata> | tcp <tcpdata> | icmp <icmpdata>\n"
- "\tCONTROL:= reclassify | pipe | drop | continue | pass\n"
+ "\tCONTROL:= reclassify | pipe | drop | continue | pass |\n"
+ "\t goto chain <CHAIN_INDEX>\n"
"\tNOTE: if 'ex' is set, extended functionality will be supported (kernel >= 4.11)\n"
"For Example usage look at the examples directory\n");
diff --git a/tc/m_police.c b/tc/m_police.c
index 2b73969..86117db 100644
--- a/tc/m_police.c
+++ b/tc/m_police.c
@@ -41,7 +41,8 @@ static void usage(void)
fprintf(stderr, "Where: CONTROL := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT]\n");
fprintf(stderr, " Define how to handle packets which exceed (<EXCEEDACT>)\n");
fprintf(stderr, " or conform (<NOTEXCEEDACT>) the configured bandwidth limit.\n");
- fprintf(stderr, " EXCEEDACT/NOTEXCEEDACT := { pipe | ok | reclassify | drop | continue }\n");
+ fprintf(stderr, " EXCEEDACT/NOTEXCEEDACT := { pipe | ok | reclassify | drop | continue |\n");
+ fprintf(stderr, " goto chain <CHAIN_INDEX> }\n");
exit(-1);
}
@@ -150,7 +151,8 @@ int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p,
matches(*argv, "shot") == 0 ||
matches(*argv, "continue") == 0 ||
matches(*argv, "pass") == 0 ||
- matches(*argv, "pipe") == 0) {
+ matches(*argv, "pipe") == 0 ||
+ matches(*argv, "goto") == 0) {
if (parse_action_control(&argc, &argv, &p.action, false))
return -1;
} else if (strcmp(*argv, "conform-exceed") == 0) {
diff --git a/tc/m_skbmod.c b/tc/m_skbmod.c
index 1ccd474..ba79308 100644
--- a/tc/m_skbmod.c
+++ b/tc/m_skbmod.c
@@ -36,7 +36,8 @@ static void skbmod_explain(void)
"\tDMAC := 6 byte Destination MAC address\n"
"\tSMAC := optional 6 byte Source MAC address\n"
"\tETYPE := optional 16 bit ethertype\n"
- "\tCONTROL := reclassify|pipe|drop|continue|ok\n"
+ "\tCONTROL := reclassify | pipe | drop | continue | ok |\n"
+ "\t goto chain <CHAIN_INDEX>\n"
"\tINDEX := skbmod index value to use\n");
}
diff --git a/tc/m_vlan.c b/tc/m_vlan.c
index 2441b06..cccb499 100644
--- a/tc/m_vlan.c
+++ b/tc/m_vlan.c
@@ -32,7 +32,8 @@ static void explain(void)
fprintf(stderr, " vlan modify [ protocol VLANPROTO ] id VLANID [ priority VLANPRIO ] [CONTROL]\n");
fprintf(stderr, " VLANPROTO is one of 802.1Q or 802.1AD\n");
fprintf(stderr, " with default: 802.1Q\n");
- fprintf(stderr, " CONTROL := reclassify | pipe | drop | continue | pass\n");
+ fprintf(stderr, " CONTROL := reclassify | pipe | drop | continue | pass |\n");
+ fprintf(stderr, " goto chain <CHAIN_INDEX>\n");
}
static void usage(void)
diff --git a/tc/tc_util.c b/tc/tc_util.c
index fd543c5..4f7283d 100644
--- a/tc/tc_util.c
+++ b/tc/tc_util.c
@@ -415,6 +415,8 @@ static const char *action_n2a(int action)
{
static char buf[64];
+ if (TC_ACT_EXT_CMP(action, TC_ACT_GOTO_CHAIN))
+ return "goto";
switch (action) {
case TC_ACT_UNSPEC:
return "continue";
@@ -459,6 +461,7 @@ static int action_a2n(char *arg, int *result, bool allow_num)
{"ok", TC_ACT_OK},
{"reclassify", TC_ACT_RECLASSIFY},
{"pipe", TC_ACT_PIPE},
+ {"goto", TC_ACT_GOTO_CHAIN},
{ NULL },
}, *iter;
@@ -498,6 +501,22 @@ int parse_action_control(int *argc_p, char ***argv_p,
fprintf(stderr, "Bad action type %s\n", *argv);
return -1;
}
+ if (result == TC_ACT_GOTO_CHAIN) {
+ __u32 chain_index;
+
+ NEXT_ARG();
+ if (matches(*argv, "chain") != 0) {
+ fprintf(stderr, "\"chain index\" expected\n");
+ return -1;
+ }
+ NEXT_ARG();
+ if (get_u32(&chain_index, *argv, 10) ||
+ chain_index > TC_ACT_EXT_VAL_MASK) {
+ fprintf(stderr, "Illegal \"chain index\"\n");
+ return -1;
+ }
+ result |= chain_index;
+ }
NEXT_ARG_FWD();
*argc_p = argc;
*argv_p = argv;
@@ -605,7 +624,10 @@ int parse_action_control_slash(int *argc_p, char ***argv_p,
void print_action_control(FILE *f, const char *prefix,
int action, const char *suffix)
{
- fprintf(f, "%s%s%s", prefix, action_n2a(action), suffix);
+ fprintf(f, "%s%s", prefix, action_n2a(action));
+ if (TC_ACT_EXT_CMP(action, TC_ACT_GOTO_CHAIN))
+ fprintf(f, " chain %u", action & TC_ACT_EXT_VAL_MASK);
+ fprintf(f, "%s", suffix);
}
int get_linklayer(unsigned int *val, const char *arg)
--
2.9.3
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