NXAST_REG_LOAD, /* struct nx_action_reg_load */
NXAST_NOTE, /* struct nx_action_note */
NXAST_SET_TUNNEL64, /* struct nx_action_set_tunnel64 */
- NXAST_MULTIPATH /* struct nx_action_multipath */
+ NXAST_MULTIPATH, /* struct nx_action_multipath */
+ NXAST_AUTOPATH /* struct nx_action_autopath */
};
/* Header for Nicira-defined actions. */
#define NXFW_ALL NXFW_TUN_ID
#define OVSFW_ALL (OFPFW_ALL | NXFW_ALL)
\f
+/* Action structure for NXAST_AUTOPATH.
+ *
+ * This action performs the following steps in sequence:
+ *
+ * 1. Hashes the flow using an implementation-defined hash function.
+ *
+ * The hashed fields' values are drawn from the current state of the
+ * flow, including all modifications that have been made by actions up to
+ * this point.
+ *
+ * 2. Selects an OpenFlow 'port'.
+ *
+ * 'port' is selected in an implementation-defined manner, taking into
+ * account 'id' and the hash value calculated in step 1.
+ *
+ * Generally a switch will have been configured with a set of ports that
+ * may be chosen given 'id'. The switch may take into account any number
+ * of factors when choosing 'port' from its configured set. Factors may
+ * include carrier, load, and the results of configuration protocols such
+ * as LACP.
+ *
+ * 3. Stores 'port' in dst[ofs:ofs+n_bits].
+ *
+ * The format and semantics of 'dst' and 'ofs_nbits' are similar to those
+ * for the NXAST_REG_LOAD action, except that 'dst' must be
+ * NXM_NX_REG(idx) for 'idx' in the switch's supported range.
+ *
+ * The switch will reject actions in which ofs+n_bits is greater than the width
+ * of 'dst', with error type OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT.
+ */
+struct nx_action_autopath {
+ ovs_be16 type; /* OFPAT_VENDOR. */
+ ovs_be16 len; /* Length is 20. */
+ ovs_be32 vendor; /* NX_VENDOR_ID. */
+ ovs_be16 subtype; /* NXAST_MULTIPATH. */
+
+ /* Where to store the result. */
+ ovs_be16 ofs_nbits; /* (ofs << 6) | (n_bits - 1). */
+ ovs_be32 dst; /* Destination register. */
+
+ ovs_be32 id; /* Autopath ID. */
+ ovs_be32 pad;
+};
+OFP_ASSERT(sizeof(struct nx_action_autopath) == 24);
+\f
/* Flexible flow specifications (aka NXM = Nicira Extended Match).
*
* OpenFlow 1.0 has "struct ofp_match" for specifying flow matches. This
lib_libopenvswitch_a_SOURCES = \
lib/aes128.c \
lib/aes128.h \
+ lib/autopath.c \
+ lib/autopath.h \
lib/backtrace.c \
lib/backtrace.h \
lib/bitmap.c \
--- /dev/null
+/*
+ * Copyright (c) 2011 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include "autopath.h"
+
+#include <inttypes.h>
+#include <stdlib.h>
+
+#include "flow.h"
+#include "nx-match.h"
+#include "ofp-util.h"
+#include "openflow/nicira-ext.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(autopath);
+
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+
+/* Loads 'ofp_port' into the appropriate register in accordance with the
+ * autopath action. */
+void
+autopath_execute(const struct nx_action_autopath *ap, struct flow *flow,
+ uint16_t ofp_port)
+{
+ uint32_t *reg = &flow->regs[NXM_NX_REG_IDX(ntohl(ap->dst))];
+ int ofs = nxm_decode_ofs(ap->ofs_nbits);
+ int n_bits = nxm_decode_n_bits(ap->ofs_nbits);
+ uint32_t mask = n_bits == 32 ? UINT32_MAX : (UINT32_C(1) << n_bits) - 1;
+ *reg = (*reg & ~(mask << ofs)) | ((ofp_port & mask) << ofs);
+}
+
+void
+autopath_parse(struct nx_action_autopath *ap, const char *s_)
+{
+ char *s;
+ uint32_t reg;
+ int id_int, ofs, n_bits;
+ char *id_str, *dst, *save_ptr;
+
+ s = xstrdup(s_);
+ save_ptr = NULL;
+ id_str = strtok_r(s, ", ", &save_ptr);
+ dst = strtok_r(NULL, ", ", &save_ptr);
+
+ if (!dst) {
+ ovs_fatal(0, "%s: not enough arguments to autopath action", s_);
+ }
+
+ id_int = atoi(id_str);
+ if (id_int < 1 || id_int > UINT32_MAX) {
+ ovs_fatal(0, "%s: autopath id %d is not in valid range "
+ "1 to %"PRIu32, s_, id_int, UINT32_MAX);
+ }
+
+ nxm_parse_field_bits(dst, ®, &ofs, &n_bits);
+ if (!NXM_IS_NX_REG(reg) || NXM_NX_REG_IDX(reg) >= FLOW_N_REGS) {
+ ovs_fatal(0, "%s: destination field must be a register", s_);
+ }
+
+ if (n_bits < 16) {
+ ovs_fatal(0, "%s: %d-bit destination field has %u possible values, "
+ "less than required 65536", s_, n_bits, 1u << n_bits);
+ }
+
+ memset(ap, 0, sizeof *ap);
+ ap->type = htons(OFPAT_VENDOR);
+ ap->len = htons(sizeof *ap);
+ ap->vendor = htonl(NX_VENDOR_ID);
+ ap->subtype = htons(NXAST_AUTOPATH);
+ ap->id = htonl(id_int);
+ ap->ofs_nbits = nxm_encode_ofs_nbits(ofs, n_bits);
+ ap->dst = htonl(reg);
+
+ free(s);
+}
+
+int
+autopath_check(const struct nx_action_autopath *ap)
+{
+ uint32_t dst = ntohl(ap->dst);
+ int ofs = nxm_decode_ofs(ap->ofs_nbits);
+ int n_bits = nxm_decode_n_bits(ap->ofs_nbits);
+
+ if (!NXM_IS_NX_REG(dst) || NXM_NX_REG_IDX(dst) >= FLOW_N_REGS) {
+ VLOG_WARN_RL(&rl, "unsupported destination field %#"PRIx32, dst);
+ } else if (ofs + n_bits > nxm_field_bits(dst)) {
+ VLOG_WARN_RL(&rl, "destination overflows output field");
+ } else if (n_bits < 16) {
+ VLOG_WARN_RL(&rl, "minimum of 16 bits required in output field");
+ } else {
+ return 0;
+ }
+
+ return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
+}
--- /dev/null
+/*
+ * Copyright (c) 2011 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef AUTOPATH_H
+#define AUTOPATH_H 1
+
+#include <stdint.h>
+
+struct flow;
+struct nx_action_autopath;
+
+/* NXAST_AUTOPATH helper functions.
+ *
+ * See include/openflow/nicira-ext.h for NXAST_AUTOPATH specification. */
+
+void autopath_execute(const struct nx_action_autopath *, struct flow *,
+ uint16_t ofp_port);
+void autopath_parse(struct nx_action_autopath *, const char *);
+int autopath_check(const struct nx_action_autopath *);
+
+#endif /* autopath.h */
#include <errno.h>
#include <stdlib.h>
+#include "autopath.h"
#include "byte-order.h"
#include "dynamic-string.h"
#include "netdev.h"
struct nx_action_multipath *nam;
nam = ofpbuf_put_uninit(b, sizeof *nam);
multipath_parse(nam, arg);
+ } else if (!strcasecmp(act, "autopath")) {
+ struct nx_action_autopath *naa;
+ naa = ofpbuf_put_uninit(b, sizeof *naa);
+ autopath_parse(naa, arg);
} else if (!strcasecmp(act, "output")) {
put_output_action(b, str_to_u32(arg));
} else if (!strcasecmp(act, "enqueue")) {
case NXAST_NOTE: return -1;
case NXAST_SET_TUNNEL64: return sizeof(struct nx_action_set_tunnel64);
case NXAST_MULTIPATH: return sizeof(struct nx_action_multipath);
+ case NXAST_AUTOPATH: return sizeof (struct nx_action_autopath);
default: return -1;
}
}
const struct nx_action_reg_move *move;
const struct nx_action_reg_load *load;
const struct nx_action_multipath *nam;
+ const struct nx_action_autopath *naa;
switch ((enum nx_action_subtype) subtype) {
case NXAST_RESUBMIT:
multipath_format(nam, string);
return;
+ case NXAST_AUTOPATH:
+ naa = (const struct nx_action_autopath *)nah;
+ ds_put_format(string, "autopath(%u,", ntohl(naa->id));
+ nxm_format_field_bits(string, ntohl(naa->dst),
+ nxm_decode_ofs(naa->ofs_nbits),
+ nxm_decode_n_bits(naa->ofs_nbits));
+ ds_put_char(string, ')');
+ return;
+
case NXAST_SNAT__OBSOLETE:
default:
break;
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
+#include "autopath.h"
#include "byte-order.h"
#include "classifier.h"
#include "dynamic-string.h"
}
return multipath_check((const struct nx_action_multipath *) a);
+ case NXAST_AUTOPATH:
+ error = check_nx_action_exact_len(
+ nah, len, sizeof(struct nx_action_autopath));
+ if (error) {
+ return error;
+ }
+ return autopath_check((const struct nx_action_autopath *) a);
+
case NXAST_SNAT__OBSOLETE:
default:
VLOG_WARN_RL(&bad_ofmsg_rl,
#include <netinet/in.h>
#include <stdbool.h>
#include <stdlib.h>
+#include "autopath.h"
#include "byte-order.h"
#include "cfm.h"
#include "classifier.h"
const struct nx_action_set_tunnel *nast;
const struct nx_action_set_queue *nasq;
const struct nx_action_multipath *nam;
+ const struct nx_action_autopath *naa;
enum nx_action_subtype subtype = ntohs(nah->subtype);
+ const struct ofhooks *ofhooks = ctx->ofproto->ofhooks;
struct xlate_reg_state state;
+ uint16_t autopath_port;
ovs_be64 tun_id;
assert(nah->vendor == htonl(NX_VENDOR_ID));
multipath_execute(nam, &ctx->flow);
break;
+ case NXAST_AUTOPATH:
+ naa = (const struct nx_action_autopath *) nah;
+ autopath_port = (ofhooks->autopath_cb
+ ? ofhooks->autopath_cb(&ctx->flow, ntohl(naa->id),
+ &ctx->tags, ctx->ofproto->aux)
+ : OFPP_NONE);
+ autopath_execute(naa, &ctx->flow, autopath_port);
+ break;
+
/* If you add a new action here that modifies flow data, don't forget to
* update the flow key in ctx->flow at the same time. */
default_normal_ofhook_cb,
NULL,
NULL,
+ NULL,
NULL
};
size_t actions_len,
uint64_t n_bytes, void *aux);
void (*account_checkpoint_cb)(void *aux);
+
+ uint16_t (*autopath_cb)(const struct flow *, uint32_t id,
+ tag_type *, void *aux);
};
void ofproto_revalidate(struct ofproto *, tag_type);
struct tag_set *ofproto_get_revalidate_set(struct ofproto *);
the \fBiter_hash\fR algorithm uses \fIarg\fR.
.IP
Refer to \fBnicira\-ext.h\fR for more details.
+.
+.IP "\fBautopath(\fIid\fB, \fIdst\fB[\fIstart\fB..\fIend\fB])\fR"
+Given \fIid\fR, chooses an OpenFlow port and populates it in
+\fIdst\fB[\fIstart\fB..\fIend\fB]\fR, which must be an NXM register as
+described above.
+.IP
+Currently, \fIid\fR should be the OpenFlow port number of an interface on the
+bridge. If it isn't then \fIdst\fB[\fIstart\fB..\fIend\fB]\fR will be
+populated with the OpenFlow port "none". If \fIid\fR is a member of a bond,
+the normal bond selection logic will be used to choose the destination port.
+Otherwise, the register will be populated with \fIid\fR itself.
+.IP
+Refer to \fBnicira\-ext.h\fR for more details.
.RE
.
.IP
}
}
+static uint16_t
+bridge_autopath_ofhook_cb(const struct flow *flow, uint32_t ofp_port,
+ tag_type *tags, void *br_)
+{
+ struct bridge *br = br_;
+ uint16_t odp_port = ofp_port_to_odp_port(ofp_port);
+ struct port *port = port_from_dp_ifidx(br, odp_port);
+ uint16_t ret;
+
+ if (!port) {
+ ret = ODPP_NONE;
+ } else if (list_is_short(&port->ifaces)) {
+ ret = odp_port;
+ } else {
+ struct iface *iface;
+
+ /* Autopath does not support VLAN hashing. */
+ iface = bond_choose_output_slave(port->bond, flow,
+ OFP_VLAN_NONE, tags);
+ ret = iface ? iface->dp_ifidx : ODPP_NONE;
+ }
+
+ return odp_port_to_ofp_port(ret);
+}
+
static struct ofhooks bridge_ofhooks = {
bridge_normal_ofhook_cb,
bridge_special_ofhook_cb,
bridge_account_flow_ofhook_cb,
bridge_account_checkpoint_ofhook_cb,
+ bridge_autopath_ofhook_cb,
};
\f
/* Port functions. */
projects / openvswitch / commitdiff