From: Isaku Yamahata <yamah...@valinux.co.jp>
Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
Signed-off-by: Simon Horman <ho...@verge.net.au>
---
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
---
lib/nx-match.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
lib/nx-match.h | 2 ++
2 files changed, 98 insertions(+), 2 deletions(-)
diff --git a/lib/nx-match.c b/lib/nx-match.c
index 1ff58bb..b1eb9e2 100644
--- a/lib/nx-match.c
+++ b/lib/nx-match.c
@@ -1022,8 +1022,23 @@ 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)
{
union mf_subvalue right_justified;
@@ -1037,6 +1052,16 @@ nxm_format_reg_load(const struct ofpact_reg_load *load,
struct ds *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,
@@ -1079,6 +1104,47 @@ 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);
+ ovs_be32 *p = (ovs_be32*)oasf->field;
+ uint32_t oxm_header = ntohl(*p);
+ uint8_t oxm_length = NXM_LENGTH(oxm_header);
+ struct ofpact_reg_load *load;
+ const struct mf_field *mf;
+ int i;
+
+ /* 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;
+ }
+ for (i = sizeof(*oasf) + oxm_length; i < oasf_len; i++) {
+ if (((const char*)oasf)[i]) {
+ 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, load->dst.ofs,
+ 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)
@@ -1096,6 +1162,22 @@ nxm_reg_move_check(const struct ofpact_reg_move *move,
const struct flow *flow)
enum ofperr
nxm_reg_load_check(const struct ofpact_reg_load *load, const struct flow *flow)
{
+ const struct mf_field *mf;
+ union mf_value value;
+
+ if (load->ofpact.compat != OFPUTIL_OFPAT12_SET_FIELD) {
+ return mf_check_dst(&load->dst, flow);
+ }
+
+ mf = load->dst.field;
+
+ memset(&value, 0, sizeof value);
+ bitwise_copy(&load->subvalue, sizeof load->subvalue, load->dst.ofs,
+ &value, load->dst.field->n_bytes, load->dst.ofs,
+ load->dst.n_bits);
+ if (!mf_is_value_valid(mf, &value)) {
+ return OFPERR_OFPBAC_BAD_ARGUMENT;
+ }
return mf_check_dst(&load->dst, flow);
}
@@ -1119,6 +1201,18 @@ nxm_reg_load_to_nxast(const struct ofpact_reg_load *load,
{
struct nx_action_reg_load *narl;
+ if (load->ofpact.compat == OFPUTIL_OFPAT12_SET_FIELD) {
+ const struct mf_field *mf = load->dst.field;
+ struct ofp12_action_set_field *oasf;
+
+ oasf = ofputil_put_OFPAT12_SET_FIELD(openflow);
+ *(uint32_t *)oasf->field = mf->oxm_header;
+ memset(oasf + 1, 0, mf->n_bytes);
+ bitwise_copy(&load->subvalue, sizeof load->subvalue, load->dst.ofs,
+ oasf + 1, mf->n_bytes, load->dst.ofs, load->dst.n_bits);
+ return;
+ }
+
narl = ofputil_put_NXAST_REG_LOAD(openflow);
narl->ofs_nbits = nxm_encode_ofs_nbits(load->dst.ofs, load->dst.n_bits);
narl->dst = htonl(load->dst.field->nxm_header);
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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