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Date: Fri, 15 Jun 2018 20:32:55 -0600
From: Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
To: lorenzo@...gle.com, netdev@...r.kernel.org,
stephen@...workplumber.org, dsahern@...il.com,
steffen.klassert@...unet.com
Cc: Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
Subject: [PATCH iproute2-next v3] ip-xfrm: Add support for OUTPUT_MARK
This patch adds support for OUTPUT_MARK in xfrm state to exercise the
functionality added by kernel commit 077fbac405bf
("net: xfrm: support setting an output mark.").
Sample output-
(with mark and output-mark)
src 192.168.1.1 dst 192.168.1.2
proto esp spi 0x00004321 reqid 0 mode tunnel
replay-window 0 flag af-unspec
mark 0x10000/0x3ffff output-mark 0x20000
auth-trunc xcbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b211 96
enc cbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b233
anti-replay context: seq 0x0, oseq 0x0, bitmap 0x00000000
(with mark only)
src 192.168.1.1 dst 192.168.1.2
proto esp spi 0x00004321 reqid 0 mode tunnel
replay-window 0 flag af-unspec
mark 0x10000/0x3ffff
auth-trunc xcbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b211 96
enc cbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b233
anti-replay context: seq 0x0, oseq 0x0, bitmap 0x00000000
(with output-mark only)
src 192.168.1.1 dst 192.168.1.2
proto esp spi 0x00004321 reqid 0 mode tunnel
replay-window 0 flag af-unspec
output-mark 0x20000
auth-trunc xcbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b211 96
enc cbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b233
anti-replay context: seq 0x0, oseq 0x0, bitmap 0x00000000
(no mark and output-mark)
src 192.168.1.1 dst 192.168.1.2
proto esp spi 0x00004321 reqid 0 mode tunnel
replay-window 0 flag af-unspec
auth-trunc xcbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b211 96
enc cbc(aes) 0x3ed0af408cf5dcbf5d5d9a5fa806b233
anti-replay context: seq 0x0, oseq 0x0, bitmap 0x00000000
v1->v2: Moved the XFRMA_OUTPUT_MARK print after XFRMA_MARK in
xfrm_xfrma_print() as mentioned by Lorenzo
v2->v3: Fix one help formatting error as mentioned by Lorenzo.
Keep mark and output-mark on the same line and add man page info as
mentioned by David.
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
---
ip/ipxfrm.c | 17 ++++++++++++++++-
ip/xfrm_state.c | 9 +++++++++
man/man8/ip-xfrm.8 | 11 +++++++++++
3 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/ip/ipxfrm.c b/ip/ipxfrm.c
index 12c2f72..17ab4ab 100644
--- a/ip/ipxfrm.c
+++ b/ip/ipxfrm.c
@@ -637,6 +637,13 @@ static void xfrm_tmpl_print(struct xfrm_user_tmpl *tmpls, int len,
}
}
+static void xfrm_output_mark_print(struct rtattr *tb[], FILE *fp)
+{
+ __u32 output_mark = rta_getattr_u32(tb[XFRMA_OUTPUT_MARK]);
+
+ fprintf(fp, "output-mark 0x%x", output_mark);
+}
+
int xfrm_parse_mark(struct xfrm_mark *mark, int *argcp, char ***argvp)
{
int argc = *argcp;
@@ -677,7 +684,15 @@ void xfrm_xfrma_print(struct rtattr *tb[], __u16 family,
struct rtattr *rta = tb[XFRMA_MARK];
struct xfrm_mark *m = RTA_DATA(rta);
- fprintf(fp, "\tmark %#x/%#x", m->v, m->m);
+ fprintf(fp, "\tmark %#x/%#x ", m->v, m->m);
+
+ if (tb[XFRMA_OUTPUT_MARK])
+ xfrm_output_mark_print(tb, fp);
+ fprintf(fp, "%s", _SL_);
+ } else if (tb[XFRMA_OUTPUT_MARK]) {
+ fprintf(fp, "\t");
+
+ xfrm_output_mark_print(tb, fp);
fprintf(fp, "%s", _SL_);
}
diff --git a/ip/xfrm_state.c b/ip/xfrm_state.c
index 85d959c..913e9fa 100644
--- a/ip/xfrm_state.c
+++ b/ip/xfrm_state.c
@@ -61,6 +61,7 @@ static void usage(void)
fprintf(stderr, " [ flag FLAG-LIST ] [ sel SELECTOR ] [ LIMIT-LIST ] [ encap ENCAP ]\n");
fprintf(stderr, " [ coa ADDR[/PLEN] ] [ ctx CTX ] [ extra-flag EXTRA-FLAG-LIST ]\n");
fprintf(stderr, " [ offload [dev DEV] dir DIR ]\n");
+ fprintf(stderr, " [ output-mark OUTPUT-MARK ]\n");
fprintf(stderr, "Usage: ip xfrm state allocspi ID [ mode MODE ] [ mark MARK [ mask MASK ] ]\n");
fprintf(stderr, " [ reqid REQID ] [ seq SEQ ] [ min SPI max SPI ]\n");
fprintf(stderr, "Usage: ip xfrm state { delete | get } ID [ mark MARK [ mask MASK ] ]\n");
@@ -322,6 +323,7 @@ static int xfrm_state_modify(int cmd, unsigned int flags, int argc, char **argv)
struct xfrm_user_sec_ctx sctx;
char str[CTX_BUF_SIZE];
} ctx = {};
+ __u32 output_mark = 0;
while (argc > 0) {
if (strcmp(*argv, "mode") == 0) {
@@ -437,6 +439,10 @@ static int xfrm_state_modify(int cmd, unsigned int flags, int argc, char **argv)
invarg("value after \"offload dir\" is invalid", *argv);
is_offload = false;
}
+ } else if (strcmp(*argv, "output-mark") == 0) {
+ NEXT_ARG();
+ if (get_u32(&output_mark, *argv, 0))
+ invarg("value after \"output-mark\" is invalid", *argv);
} else {
/* try to assume ALGO */
int type = xfrm_algotype_getbyname(*argv);
@@ -720,6 +726,9 @@ static int xfrm_state_modify(int cmd, unsigned int flags, int argc, char **argv)
}
}
+ if (output_mark)
+ addattr32(&req.n, sizeof(req.buf), XFRMA_OUTPUT_MARK, output_mark);
+
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
diff --git a/man/man8/ip-xfrm.8 b/man/man8/ip-xfrm.8
index 988cc6a..839e06a 100644
--- a/man/man8/ip-xfrm.8
+++ b/man/man8/ip-xfrm.8
@@ -59,6 +59,8 @@ ip-xfrm \- transform configuration
.IR CTX " ]"
.RB "[ " extra-flag
.IR EXTRA-FLAG-LIST " ]"
+.RB "[ " output-mark
+.IR OUTPUT-MARK " ]"
.ti -8
.B "ip xfrm state allocspi"
@@ -537,6 +539,15 @@ encapsulates packets with protocol
.RI "using source port " SPORT ", destination port " DPORT
.RI ", and original address " OADDR "."
+.TP
+.I MARK
+used to match xfrm policies and states
+
+.TP
+.I OUTPUT-MARK
+used to set the output mark to influence the routing
+of the packets emitted by the state
+
.sp
.PP
.TS
--
1.9.1
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