From: Isaku Yamahata <[email protected]>
Signed-off-by: Isaku Yamahata <[email protected]>
Signed-off-by: Simon Horman <[email protected]>
---
v6 [Simon Horman]
* Change ofp12_action_set_field so that the last element is
ovs_be32 dst rather than uint8_t field[4].
This avoids some casting when the field is used.
* Use is_all_zeros()
* Accept non-OXM fields in nxm_reg_load_from_openflow12_set_field()
* Leave nxm_reg_load_check() unmodified, the NXM checks should be sufficient
* Save subvalue right-justified in nxm_reg_load_from_openflow12_set_field()
* Add room for value and padding in nxm_reg_load_to_nxast()
* If outputing a flow using OpenFlow 1.1 or 1.2 then split any
set-field actions into NXM load actions
v5 [Simon Horman]
* Do not add mf_check_dst_oxm(), just use mf_check_dst().
v4 [Simon Horman]
* Remove utilities/ovs-ofctl.c hunk, introduced in v3,
which belongs in a different patch
* Make use of new oxm_writable field in struct mf_subfield
to implement mf_check_dst_oxm(). This provides more
strict checking than the previous implementation.
* Do not call pre-requisites explicitly in mf_are_prereqs_ok()
- It will segfault as flow is NULL
- It would be called by mf_is_value_valid() if
flow was not NULL
* Correct byte-order issues in nxm_reg_load_from_openflow12_set_field()
* Add set_field_format() and use it in nxm_format_reg_load()
* Update to use mf_subfield
v3 [Simon Horman]
* Add (now) missing cases to nxm_reg_load_check()
v2 [Isaku Yamahata]
* First post
---
include/openflow/openflow-1.2.h | 2 +-
lib/nx-match.c | 137 +++++++++++++++++++++++++++++++++++++--
lib/nx-match.h | 2 +
3 files changed, 135 insertions(+), 6 deletions(-)
diff --git a/include/openflow/openflow-1.2.h b/include/openflow/openflow-1.2.h
index 0a73ed1..cf5ba2d 100644
--- a/include/openflow/openflow-1.2.h
+++ b/include/openflow/openflow-1.2.h
@@ -221,7 +221,7 @@ struct ofp12_action_set_field {
* - Exactly ((oxm_len + 4) + 7)/8*8 - (oxm_len + 4) (between 0 and 7)
* bytes of all-zero bytes
*/
- uint8_t field[4]; /* OXM TLV - Make compiler happy */
+ ovs_be32 dst; /* OXM TLV header */
};
OFP_ASSERT(sizeof(struct ofp12_action_set_field) == 8);
diff --git a/lib/nx-match.c b/lib/nx-match.c
index 17ef160..e1b3c61 100644
--- a/lib/nx-match.c
+++ b/lib/nx-match.c
@@ -1019,14 +1019,39 @@ nxm_format_reg_move(const struct ofpact_reg_move *move,
struct ds *s)
mf_format_subfield(&move->dst, s);
}
-void
-nxm_format_reg_load(const struct ofpact_reg_load *load, struct ds *s)
+static void
+set_field_format(const struct ofpact_reg_load *load, struct ds *s)
+{
+ const struct mf_field *mf = load->dst.field;
+ union mf_value value;
+
+ assert(load->ofpact.compat == OFPUTIL_OFPAT12_SET_FIELD);
+ ds_put_format(s, "set_field:");
+ memset(&value, 0, sizeof value);
+ bitwise_copy(&load->subvalue, sizeof load->subvalue, load->dst.ofs,
+ &value, mf->n_bytes, 0, load->dst.n_bits);
+ mf_format(mf, &value, NULL, s);
+ ds_put_format(s, "->%s", mf->name);
+}
+
+static void
+load_format(const struct ofpact_reg_load *load, struct ds *s)
{
ds_put_cstr(s, "load:");
mf_format_subvalue(&load->subvalue, s);
ds_put_cstr(s, "->");
mf_format_subfield(&load->dst, s);
}
+
+void
+nxm_format_reg_load(const struct ofpact_reg_load *load, struct ds *s)
+{
+ if (load->ofpact.compat == OFPUTIL_OFPAT12_SET_FIELD) {
+ set_field_format(load, s);
+ } else {
+ load_format(load, s);
+ }
+}
enum ofperr
nxm_reg_move_from_openflow(const struct nx_action_reg_move *narm,
@@ -1066,6 +1091,43 @@ nxm_reg_load_from_openflow(const struct
nx_action_reg_load *narl,
return nxm_reg_load_check(load, NULL);
}
+
+enum ofperr
+nxm_reg_load_from_openflow12_set_field(
+ const struct ofp12_action_set_field * oasf, struct ofpbuf *ofpacts)
+{
+ uint16_t oasf_len = ntohs(oasf->len);
+ uint32_t oxm_header = ntohl(oasf->dst);
+ uint8_t oxm_length = NXM_LENGTH(oxm_header);
+ struct ofpact_reg_load *load;
+ const struct mf_field *mf;
+
+ /* ofp12_action_set_field is padded to 64 bits by zero */
+ if (oasf_len != ROUND_UP(sizeof(*oasf) + oxm_length, 8)) {
+ return OFPERR_OFPBAC_BAD_ARGUMENT;
+ }
+ if (!is_all_zeros((const uint8_t *)(oasf) + sizeof *oasf + oxm_length,
+ oasf_len - oxm_length - sizeof *oasf)) {
+ return OFPERR_OFPBAC_BAD_ARGUMENT;
+ }
+
+ if (NXM_HASMASK(oxm_header)) {
+ return OFPERR_OFPBAC_BAD_ARGUMENT;
+ }
+ mf = mf_from_nxm_header(oxm_header);
+ if (!mf || mf->oxm_header == 0) {
+ return OFPERR_OFPBAC_BAD_ARGUMENT;
+ }
+ load = ofpact_put_REG_LOAD(ofpacts);
+ load->ofpact.compat = OFPUTIL_OFPAT12_SET_FIELD;
+ load->dst.field = mf;
+ load->dst.ofs = 0;
+ load->dst.n_bits = mf->n_bits;
+ bitwise_copy(oasf + 1, mf->n_bytes, load->dst.ofs,
+ &load->subvalue, sizeof load->subvalue, 0, mf->n_bits);
+
+ return nxm_reg_load_check(load, NULL);
+}
enum ofperr
nxm_reg_move_check(const struct ofpact_reg_move *move, const struct flow *flow)
@@ -1100,9 +1162,8 @@ nxm_reg_move_to_nxast(const struct ofpact_reg_move *move,
narm->dst = htonl(move->dst.field->nxm_header);
}
-void
-nxm_reg_load_to_nxast(const struct ofpact_reg_load *load,
- struct ofpbuf *openflow)
+static void
+reg_load_to_nast(const struct ofpact_reg_load *load, struct ofpbuf *openflow)
{
struct nx_action_reg_load *narl;
@@ -1111,6 +1172,72 @@ nxm_reg_load_to_nxast(const struct ofpact_reg_load *load,
narl->dst = htonl(load->dst.field->nxm_header);
narl->value = load->subvalue.be64[1];
}
+
+static void
+set_field_to_nast(const struct ofpact_reg_load *load, struct ofpbuf *openflow)
+{
+ const struct mf_field *mf = load->dst.field;
+ struct ofp12_action_set_field *oasf;
+ uint16_t padded_value_len;
+
+ oasf = ofputil_put_OFPAT12_SET_FIELD(openflow);
+ oasf->dst = htonl(mf->oxm_header);
+
+ /* Set field is the only action of variable length (so far),
+ * so handling the variable length portion is open-coded here */
+ padded_value_len = ROUND_UP(mf->n_bytes, 8);
+ ofpbuf_put_uninit(openflow, padded_value_len);
+ oasf->len = htons(ntohs(oasf->len) + padded_value_len);
+ memset(oasf + 1, 0, padded_value_len);
+
+ bitwise_copy(&load->subvalue, sizeof load->subvalue, load->dst.ofs,
+ oasf + 1, mf->n_bytes, load->dst.ofs, load->dst.n_bits);
+ return;
+}
+
+void
+nxm_reg_load_to_nxast(const struct ofpact_reg_load *load,
+ struct ofpbuf *openflow)
+{
+
+ if (load->ofpact.compat == OFPUTIL_OFPAT12_SET_FIELD) {
+ struct ofp_header *oh = (struct ofp_header *)openflow->l2;
+
+ switch(oh->version) {
+ case OFP12_VERSION:
+ set_field_to_nast(load, openflow);
+ break;
+
+ case OFP11_VERSION:
+ case OFP10_VERSION:
+ if (load->dst.n_bits < 64) {
+ reg_load_to_nast(load, openflow);
+ } else {
+ /* Split into 64bit chunks */
+ int chunk, ofs;
+ for (ofs = 0; ofs < load->dst.n_bits; ofs += chunk) {
+ struct ofpact_reg_load subload = *load;
+
+ chunk = MIN(load->dst.n_bits - ofs, 64);
+
+ subload.dst.field = load->dst.field;
+ subload.dst.ofs = load->dst.ofs + ofs;
+ subload.dst.n_bits = chunk;
+ bitwise_copy(&load->subvalue, sizeof load->subvalue, ofs,
+ &subload.subvalue, sizeof subload.subvalue, 0,
+ chunk);
+ reg_load_to_nast(&subload, openflow);
+ }
+ }
+ break;
+
+ default:
+ NOT_REACHED();
+ }
+ } else {
+ reg_load_to_nast(load, openflow);
+ }
+}
/* nxm_execute_reg_move(), nxm_execute_reg_load(). */
diff --git a/lib/nx-match.h b/lib/nx-match.h
index f504ad0..6a57297 100644
--- a/lib/nx-match.h
+++ b/lib/nx-match.h
@@ -65,6 +65,8 @@ enum ofperr nxm_reg_move_from_openflow(const struct
nx_action_reg_move *,
struct ofpbuf *ofpacts);
enum ofperr nxm_reg_load_from_openflow(const struct nx_action_reg_load *,
struct ofpbuf *ofpacts);
+enum ofperr nxm_reg_load_from_openflow12_set_field(
+ const struct ofp12_action_set_field * oasf, struct ofpbuf *ofpacts);
enum ofperr nxm_reg_move_check(const struct ofpact_reg_move *,
const struct flow *);
--
1.7.10.4
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