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Date: Fri, 4 Oct 2013 17:09:57 +0900
From: Simon Horman <horms@...ge.net.au>
To: dev@...nvswitch.org, netdev@...r.kernel.org,
Jesse Gross <jesse@...ira.com>, Ben Pfaff <blp@...ira.com>
Cc: Pravin B Shelar <pshelar@...ira.com>, Ravi K <rkerur@...il.com>,
Isaku Yamahata <yamahata@...inux.co.jp>,
Joe Stringer <joe@...d.net.nz>
Subject: [PATCH v2.42 2/5] ofp-actions: Add separate OpenFlow 1.3 action parser
From: Joe Stringer <joe@...d.net.nz>
This patch adds new ofpact_from_openflow13() and
ofpacts_from_openflow13() functions parallel to the existing ofpact
handling code. In the OpenFlow 1.3 version, push_mpls is handled
differently, but all other actions are handled by the existing code.
In the case of push_mpls for OpenFlow 1.3 the new mpls_before_vlan field of
struct ofpact_push_mpls is set to true. This will be used by a subsequent
patch to allow allow the correct VLAN+MPLS datapath behaviour to be
determined at odp translation time.
Signed-off-by: Joe Stringer <joe@...d.net.nz>
Signed-off-by: Simon Horman <horms@...ge.net.au>
---
v2.41 [Simon Horman]
* As suggested by Ben Pfaff
+ Expand struct ofpact_reg_load to include a mpls_before_vlan field
rather than using the compat field of the ofpact field of
struct ofpact_reg_load.
+ Pass version to ofpacts_pull_openflow11_actions and
ofpacts_pull_openflow11_instructions. This removes the invalid
assumption that that these functions are passed a full message and are
thus able to deduce the OpenFlow version.
v2.36 - v2.40
* No change
v2.35 [Joe Stringer]
* First post
---
lib/ofp-actions.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++---
lib/ofp-actions.h | 9 +++++++
lib/ofp-print.c | 2 +-
lib/ofp-util.c | 24 ++++++++++--------
lib/ofp-util.h | 2 +-
utilities/ovs-ofctl.c | 8 +++---
6 files changed, 93 insertions(+), 20 deletions(-)
diff --git a/lib/ofp-actions.c b/lib/ofp-actions.c
index 65430f3..434d020 100644
--- a/lib/ofp-actions.c
+++ b/lib/ofp-actions.c
@@ -881,6 +881,40 @@ ofpacts_from_openflow11(const union ofp_action *in, size_t n_in,
return ofpacts_from_openflow(in, n_in, out, ofpact_from_openflow11);
}
.
+static enum ofperr
+ofpact_from_openflow13(const union ofp_action *a, struct ofpbuf *out)
+{
+ enum ofputil_action_code code;
+ enum ofperr error;
+
+ error = decode_openflow11_action(a, &code);
+ if (error) {
+ return error;
+ }
+
+ if (code == OFPUTIL_OFPAT11_PUSH_MPLS) {
+ struct ofpact_push_mpls *oam;
+ struct ofp11_action_push *oap = (struct ofp11_action_push *)a;
+ if (!eth_type_mpls(oap->ethertype)) {
+ return OFPERR_OFPBAC_BAD_ARGUMENT;
+ }
+ oam = ofpact_put_PUSH_MPLS(out);
+ oam->ethertype = oap->ethertype;
+ oam->mpls_before_vlan = true;
+ } else {
+ return ofpact_from_openflow11(a, out);
+ }
+
+ return error;
+}
+
+static enum ofperr
+ofpacts_from_openflow13(const union ofp_action *in, size_t n_in,
+ struct ofpbuf *out)
+{
+ return ofpacts_from_openflow(in, n_in, out, ofpact_from_openflow13);
+}
+.
/* OpenFlow 1.1 instructions. */
#define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) \
@@ -1085,11 +1119,14 @@ get_actions_from_instruction(const struct ofp11_instruction *inst,
*n_actions = (ntohs(inst->len) - sizeof *inst) / OFP11_INSTRUCTION_ALIGN;
}
-/* Attempts to convert 'actions_len' bytes of OpenFlow 1.1 actions from the
+/* Attempts to convert 'actions_len' bytes of OpenFlow actions from the
* front of 'openflow' into ofpacts. On success, replaces any existing content
* in 'ofpacts' by the converted ofpacts; on failure, clears 'ofpacts'.
* Returns 0 if successful, otherwise an OpenFlow error.
*
+ * Actions are processed according to their OpenFlow version which
+ * is provided in the 'version' parameter.
+ *
* In most places in OpenFlow 1.1 and 1.2, actions appear encapsulated in
* instructions, so you should call ofpacts_pull_openflow11_instructions()
* instead of this function.
@@ -1101,15 +1138,27 @@ get_actions_from_instruction(const struct ofp11_instruction *inst,
* valid in a specific context. */
enum ofperr
ofpacts_pull_openflow11_actions(struct ofpbuf *openflow,
+ enum ofp_version version,
unsigned int actions_len,
struct ofpbuf *ofpacts)
{
- return ofpacts_pull_actions(openflow, actions_len, ofpacts,
- ofpacts_from_openflow11);
+ switch (version) {
+ case OFP10_VERSION:
+ case OFP11_VERSION:
+ case OFP12_VERSION:
+ return ofpacts_pull_actions(openflow, actions_len, ofpacts,
+ ofpacts_from_openflow11);
+ case OFP13_VERSION:
+ return ofpacts_pull_actions(openflow, actions_len, ofpacts,
+ ofpacts_from_openflow13);
+ default:
+ NOT_REACHED();
+ }
}
enum ofperr
ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
+ enum ofp_version version,
unsigned int instructions_len,
struct ofpbuf *ofpacts)
{
@@ -1160,7 +1209,18 @@ ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
get_actions_from_instruction(insts[OVSINST_OFPIT11_APPLY_ACTIONS],
&actions, &n_actions);
- error = ofpacts_from_openflow11(actions, n_actions, ofpacts);
+ switch (version) {
+ case OFP10_VERSION:
+ case OFP11_VERSION:
+ case OFP12_VERSION:
+ error = ofpacts_from_openflow11(actions, n_actions, ofpacts);
+ break;
+ case OFP13_VERSION:
+ error = ofpacts_from_openflow13(actions, n_actions, ofpacts);
+ break;
+ default:
+ NOT_REACHED();
+ }
if (error) {
goto exit;
}
diff --git a/lib/ofp-actions.h b/lib/ofp-actions.h
index 0876ed7..d67fc3f 100644
--- a/lib/ofp-actions.h
+++ b/lib/ofp-actions.h
@@ -332,6 +332,13 @@ struct ofpact_reg_load {
struct ofpact_push_mpls {
struct ofpact ofpact;
ovs_be16 ethertype;
+ bool mpls_before_vlan; /* If true then the MPLS LSE will be added
+ * immediately after the ethernet header
+ * and before any VLAN tags that are present.
+ * This is the behaviour for OpenFlow 1.3+.
+ * Otherwise the MPLS LSE will be added after
+ * any VLAN tags that are present. This is the
+ * behaviour for OpenFlow 1.1 and 1.2. */
};
/* OFPACT_POP_MPLS
@@ -504,9 +511,11 @@ enum ofperr ofpacts_pull_openflow10(struct ofpbuf *openflow,
unsigned int actions_len,
struct ofpbuf *ofpacts);
enum ofperr ofpacts_pull_openflow11_actions(struct ofpbuf *openflow,
+ enum ofp_version version,
unsigned int actions_len,
struct ofpbuf *ofpacts);
enum ofperr ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
+ enum ofp_version version,
unsigned int instructions_len,
struct ofpbuf *ofpacts);
enum ofperr ofpacts_check(const struct ofpact[], size_t ofpacts_len,
diff --git a/lib/ofp-print.c b/lib/ofp-print.c
index 6fe1cee..a0615b5 100644
--- a/lib/ofp-print.c
+++ b/lib/ofp-print.c
@@ -2224,7 +2224,7 @@ ofp_print_group_desc(struct ds *s, const struct ofp_header *oh)
struct ofputil_group_desc gd;
int retval;
- retval = ofputil_decode_group_desc_reply(&gd, &b);
+ retval = ofputil_decode_group_desc_reply(&gd, &b, oh->version);
if (retval) {
if (retval != EOF) {
ds_put_cstr(s, " ***parse error***");
diff --git a/lib/ofp-util.c b/lib/ofp-util.c
index 173b534..570447a 100644
--- a/lib/ofp-util.c
+++ b/lib/ofp-util.c
@@ -1504,7 +1504,8 @@ ofputil_decode_flow_mod(struct ofputil_flow_mod *fm,
return error;
}
- error = ofpacts_pull_openflow11_instructions(&b, b.size, ofpacts);
+ error = ofpacts_pull_openflow11_instructions(&b, oh->version,
+ b.size, ofpacts);
if (error) {
return error;
}
@@ -2360,7 +2361,8 @@ ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *fs,
return EINVAL;
}
- if (ofpacts_pull_openflow11_instructions(msg, length - sizeof *ofs -
+ if (ofpacts_pull_openflow11_instructions(msg, oh->version,
+ length - sizeof *ofs -
padded_match_len, ofpacts)) {
VLOG_WARN_RL(&bad_ofmsg_rl, "OFPST_FLOW reply bad instructions");
return EINVAL;
@@ -3092,7 +3094,8 @@ ofputil_decode_packet_out(struct ofputil_packet_out *po,
return error;
}
- error = ofpacts_pull_openflow11_actions(&b, ntohs(opo->actions_len),
+ error = ofpacts_pull_openflow11_actions(&b, oh->version,
+ ntohs(opo->actions_len),
ofpacts);
if (error) {
return error;
@@ -5674,8 +5677,8 @@ ofputil_append_group_desc_reply(const struct ofputil_group_desc *gds,
}
static enum ofperr
-ofputil_pull_buckets(struct ofpbuf *msg, size_t buckets_length,
- struct list *buckets)
+ofputil_pull_buckets(struct ofpbuf *msg, enum ofp_version version,
+ size_t buckets_length, struct list *buckets)
{
struct ofp11_bucket *ob;
@@ -5708,8 +5711,8 @@ ofputil_pull_buckets(struct ofpbuf *msg, size_t buckets_length,
buckets_length -= ob_len;
ofpbuf_init(&ofpacts, 0);
- error = ofpacts_pull_openflow11_actions(msg, ob_len - sizeof *ob,
- &ofpacts);
+ error = ofpacts_pull_openflow11_actions(msg, version,
+ ob_len - sizeof *ob, &ofpacts);
if (error) {
ofpbuf_uninit(&ofpacts);
ofputil_bucket_list_destroy(buckets);
@@ -5745,7 +5748,7 @@ ofputil_pull_buckets(struct ofpbuf *msg, size_t buckets_length,
* otherwise a positive errno value. */
int
ofputil_decode_group_desc_reply(struct ofputil_group_desc *gd,
- struct ofpbuf *msg)
+ struct ofpbuf *msg, enum ofp_version version)
{
struct ofp11_group_desc_stats *ogds;
size_t length;
@@ -5774,7 +5777,8 @@ ofputil_decode_group_desc_reply(struct ofputil_group_desc *gd,
return OFPERR_OFPBRC_BAD_LEN;
}
- return ofputil_pull_buckets(msg, length - sizeof *ogds, &gd->buckets);
+ return ofputil_pull_buckets(msg, version, length - sizeof *ogds,
+ &gd->buckets);
}
/* Converts abstract group mod 'gm' into a message for OpenFlow version
@@ -5857,7 +5861,7 @@ ofputil_decode_group_mod(const struct ofp_header *oh,
gm->type = ogm->type;
gm->group_id = ntohl(ogm->group_id);
- return ofputil_pull_buckets(&msg, msg.size, &gm->buckets);
+ return ofputil_pull_buckets(&msg, oh->version, msg.size, &gm->buckets);
}
/* Parse a queue status request message into 'oqsr'.
diff --git a/lib/ofp-util.h b/lib/ofp-util.h
index d5f34d7..5fa8fee 100644
--- a/lib/ofp-util.h
+++ b/lib/ofp-util.h
@@ -973,7 +973,7 @@ int ofputil_decode_group_stats_reply(struct ofpbuf *,
struct ofputil_group_stats *);
int ofputil_decode_group_desc_reply(struct ofputil_group_desc *,
- struct ofpbuf *);
+ struct ofpbuf *, enum ofp_version);
void ofputil_append_group_desc_reply(const struct ofputil_group_desc *,
struct list *buckets,
diff --git a/utilities/ovs-ofctl.c b/utilities/ovs-ofctl.c
index c2cc1f6..00d35aa 100644
--- a/utilities/ovs-ofctl.c
+++ b/utilities/ovs-ofctl.c
@@ -2968,8 +2968,8 @@ ofctl_parse_ofp11_actions(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
/* Convert to ofpacts. */
ofpbuf_init(&ofpacts, 0);
size = of11_in.size;
- error = ofpacts_pull_openflow11_actions(&of11_in, of11_in.size,
- &ofpacts);
+ error = ofpacts_pull_openflow11_actions(&of11_in, OFP11_VERSION,
+ of11_in.size, &ofpacts);
if (error) {
printf("bad OF1.1 actions: %s\n\n", ofperr_get_name(error));
ofpbuf_uninit(&ofpacts);
@@ -3036,8 +3036,8 @@ ofctl_parse_ofp11_instructions(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
/* Convert to ofpacts. */
ofpbuf_init(&ofpacts, 0);
size = of11_in.size;
- error = ofpacts_pull_openflow11_instructions(&of11_in, of11_in.size,
- &ofpacts);
+ error = ofpacts_pull_openflow11_instructions(&of11_in, OFP11_VERSION,
+ of11_in.size, &ofpacts);
if (!error) {
/* Verify actions. */
struct flow flow;
--
1.8.4
--
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