From: Saloni Jain <[email protected]>
This commit enables the eviction mechanism on the basis of importance as
per the openflow specification 1.4.
ovs-ofctl -O OpenFlow14 mod-table <switch> <table> evict
-Enable eviction on <table> of <switch>. Eviction adds a mechanism
enabling the switch to automatically eliminate entries of lower
importance to make space for newer entries.If want to enable eviction
on all tables, user can set the <table> as 'ALL'.
ovs-ofctl -O OpenFlow14 mod-table <switch> <table> noevict
-Disable eviction on <table> of <switch>.
ovs-ofctl -O OpenFlow14 dump-tables-desc <switch>
-This command provides a way to list the current configuration
(eviction for importance) of the tables on a <switch>, which is set
using the mod-table command.
Signed-off-by: Saloni Jain <[email protected]>
Signed-off-by: Hiteshi Kalra <[email protected]>
---
DESIGN.md | 19 +++--
NEWS | 2 +
include/openflow/openflow-1.4.h | 10 +++
lib/learning-switch.c | 2 +
lib/ofp-msgs.h | 10 +++
lib/ofp-parse.c | 4 +
lib/ofp-print.c | 62 +++++++++++++-
lib/ofp-util.c | 178 +++++++++++++++++++++++++++++++++++++++-
lib/ofp-util.h | 28 +++++++
lib/rconn.c | 2 +
ofproto/ofproto-provider.h | 2 +
ofproto/ofproto.c | 158 +++++++++++++++++++++++++++++++++--
tests/ofp-print.at | 1 +
tests/ofproto.at | 105 ++++++++++++++++++++++++
utilities/ovs-ofctl.8.in | 25 +++++-
utilities/ovs-ofctl.c | 21 +++++
16 files changed, 608 insertions(+), 21 deletions(-)
diff --git a/DESIGN.md b/DESIGN.md
index 4d94c2d..874c0f2 100644
--- a/DESIGN.md
+++ b/DESIGN.md
@@ -277,13 +277,18 @@ The table for 1.3 is the same as the one shown above for
1.2.
OpenFlow 1.4
-------------
-
-OpenFlow 1.4 adds the "importance" field to flow_mods, but it does not
-explicitly specify which kinds of flow_mods set the importance.For
-consistency, Open vSwitch uses the same rule for importance as for
-idle_timeout and hard_timeout, that is, only an "ADD" flow_mod sets
-the importance. (This issue has been filed with the ONF as EXT-496.)
+-----------
+OpenFlow 1.4 makes these changes:
+
+ - Adds the "importance" field to flow_mods, but it does not
+ explicitly specify which kinds of flow_mods set the importance.
+ For consistency, Open vSwitch uses the same rule for importance
+ as for idle_timeout and hard_timeout, that is, only an "ADD"
+ flow_mod sets the importance. (This issue has been filed with
+ the ONF as EXT-496.)
+
+ - Eviction Mechanism to automatically delete entries of lower
+ importance to make space for newer entries.
OFPT_PACKET_IN
==============
diff --git a/NEWS b/NEWS
index adfa1d1..cd175f8 100644
--- a/NEWS
+++ b/NEWS
@@ -33,6 +33,8 @@ Post-v2.3.0
is executed last, and only if the action set has no "output" or "group"
action.
* OpenFlow 1.4+ flow "importance" is now maintained in the flow table.
+ * OpenFlow 1.4+ table-mod flow eviction on basis of importance and
+ table-description requests are now supported.
- ovs-pki: Changed message digest algorithm from MD5 to SHA-1 because
MD5 is no longer secure and some operating systems have started to disable
it in OpenSSL.
diff --git a/include/openflow/openflow-1.4.h b/include/openflow/openflow-1.4.h
index 7631e47..c1ac227 100644
--- a/include/openflow/openflow-1.4.h
+++ b/include/openflow/openflow-1.4.h
@@ -155,6 +155,16 @@ struct ofp14_table_mod {
};
OFP_ASSERT(sizeof(struct ofp14_table_mod) == 8);
+/* Body of reply to OFPMP_TABLE_DESC request. */
+struct ofp14_table_desc {
+ ovs_be16 length; /* Length is padded to 64 bits. */
+ uint8_t table_id; /* Identifier of table. Lower numbered tables are
consulted first. */
+ uint8_t pad[1]; /* Align to 32-bits. */
+ ovs_be32 config; /* Bitmap of OFPTC_* values. */
+ /* Followed by 0 or more OFPTMPT14_* properties. */
+};
+OFP_ASSERT(sizeof(struct ofp14_table_desc) == 8);
+
/* ## ---------------- ## */
/* ## ofp14_port_stats ## */
diff --git a/lib/learning-switch.c b/lib/learning-switch.c
index 1423ac4..27273ad 100644
--- a/lib/learning-switch.c
+++ b/lib/learning-switch.c
@@ -439,6 +439,8 @@ lswitch_process_packet(struct lswitch *sw, const struct
ofpbuf *msg)
case OFPTYPE_METER_FEATURES_STATS_REPLY:
case OFPTYPE_TABLE_FEATURES_STATS_REQUEST:
case OFPTYPE_TABLE_FEATURES_STATS_REPLY:
+ case OFPTYPE_TABLE_DESC_REQUEST:
+ case OFPTYPE_TABLE_DESC_REPLY:
case OFPTYPE_BUNDLE_CONTROL:
case OFPTYPE_BUNDLE_ADD_MESSAGE:
default:
diff --git a/lib/ofp-msgs.h b/lib/ofp-msgs.h
index 23c334a..d14c569 100644
--- a/lib/ofp-msgs.h
+++ b/lib/ofp-msgs.h
@@ -369,6 +369,12 @@ enum ofpraw {
/* OFPST 1.3+ (12): struct ofp13_table_features, uint8_t[8][]. */
OFPRAW_OFPST13_TABLE_FEATURES_REPLY,
+ /* OFPST 1.4+ (15): void. */
+ OFPRAW_OFPST14_TABLE_DESC_REQUEST,
+
+ /* OFPST 1.4+ (15): struct ofp14_table_desc, uint8_t[8][]. */
+ OFPRAW_OFPST14_TABLE_DESC_REPLY,
+
/* OFPST 1.0-1.4 (13): void. */
OFPRAW_OFPST10_PORT_DESC_REQUEST,
/* OFPST 1.5+ (13): ovs_be32. */
@@ -602,6 +608,10 @@ enum ofptype {
OFPTYPE_TABLE_FEATURES_STATS_REPLY, /*
OFPRAW_OFPST13_TABLE_FEATURES_REPLY. */
+ OFPTYPE_TABLE_DESC_REQUEST, /* OFPRAW_OFPST14_TABLE_DESC_REQUEST. */
+
+ OFPTYPE_TABLE_DESC_REPLY, /* OFPRAW_OFPST14_TABLE_DESC_REPLY. */
+
OFPTYPE_PORT_DESC_STATS_REQUEST, /* OFPRAW_OFPST10_PORT_DESC_REQUEST.
* OFPRAW_OFPST15_PORT_DESC_REQUEST. */
diff --git a/lib/ofp-parse.c b/lib/ofp-parse.c
index 9acf6a4..ac0f7d7 100644
--- a/lib/ofp-parse.c
+++ b/lib/ofp-parse.c
@@ -866,6 +866,10 @@ parse_ofp_table_mod(struct ofputil_table_mod *tm, const
char *table_id,
tm->miss_config = OFPUTIL_TABLE_MISS_CONTINUE;
} else if (strcmp(flow_miss_handling, "drop") == 0) {
tm->miss_config = OFPUTIL_TABLE_MISS_DROP;
+ } else if (strcmp(flow_miss_handling, "evict") == 0) {
+ tm->config = OFPUTIL_TABLE_CONFIG_EVICTION;
+ } else if (strcmp(flow_miss_handling, "noevict") == 0) {
+ tm->config = OFPUTIL_TABLE_CONFIG_NO_EVICTION;
} else {
return xasprintf("invalid flow_miss_handling %s", flow_miss_handling);
}
diff --git a/lib/ofp-print.c b/lib/ofp-print.c
index f4c5bc6..dea57ea 100644
--- a/lib/ofp-print.c
+++ b/lib/ofp-print.c
@@ -987,6 +987,22 @@ ofp_print_table_miss_config(struct ds *string, enum
ofputil_table_miss miss)
}
}
+/* This Function will print the config properties of table set through
+ * mod-table command */
+static void
+ofp_print_table_config(struct ds *string, enum ofputil_table_config config,
+ uint32_t flags)
+{
+ if (config & OFPUTIL_TABLE_CONFIG_EVICTION) {
+ ds_put_cstr(string, "Eviction");
+ if (flags & OFPTMPEF14_IMPORTANCE) {
+ ds_put_cstr(string, " flag: Importance\n");
+ }
+ } else if ((config & OFPUTIL_TABLE_CONFIG_EVICTION) == 0) {
+ ds_put_cstr(string, "No Eviction\n");
+ }
+}
+
static void
ofp_print_table_mod(struct ds *string, const struct ofp_header *oh)
{
@@ -1006,11 +1022,26 @@ ofp_print_table_mod(struct ds *string, const struct
ofp_header *oh)
}
if (pm.miss_config != OFPUTIL_TABLE_MISS_DEFAULT) {
- ds_put_cstr(string, ", flow_miss_config=");
- ofp_print_table_miss_config(string, pm.miss_config);
+ ds_put_cstr(string, ", flow_miss_config=");
+ ofp_print_table_miss_config(string, pm.miss_config);
+ }
+ if (oh->version >= OFP14_VERSION) {
+ ds_put_cstr(string, "\n config = ");
+ ofp_print_table_config(string, pm.config, pm.eviction_flags);
}
}
+/* This function will print the Table description properties */
+static void
+ofp_print_table_desc(struct ds *string, const struct ofputil_table_desc *td)
+{
+ ds_put_format(string, "\n table %"PRIu8, td->table_id);
+ ds_put_cstr(string, ":\n");
+
+ ds_put_cstr(string, " config = ");
+ ofp_print_table_config(string, td->config, td->eviction_flags);
+}
+
static void
ofp_print_queue_get_config_request(struct ds *string,
const struct ofp_header *oh)
@@ -2562,6 +2593,28 @@ ofp_print_table_features_reply(struct ds *s, const
struct ofp_header *oh)
}
}
+static void
+ofp_print_table_desc_reply(struct ds *s, const struct ofp_header *oh)
+{
+ struct ofpbuf b;
+
+ ofpbuf_use_const(&b, oh, ntohs(oh->length));
+
+ for (;;) {
+ struct ofputil_table_desc td;
+ int retval;
+
+ retval = ofputil_decode_table_desc(&b, &td);
+ if (retval) {
+ if (retval != EOF) {
+ ofp_print_error(s, retval);
+ }
+ return;
+ }
+ ofp_print_table_desc(s, &td);
+ }
+}
+
static const char *
bundle_flags_to_name(uint32_t bit)
{
@@ -2690,6 +2743,11 @@ ofp_to_string__(const struct ofp_header *oh, enum ofpraw
raw,
ofp_print_table_features_reply(string, oh);
break;
+ case OFPTYPE_TABLE_DESC_REQUEST:
+ case OFPTYPE_TABLE_DESC_REPLY:
+ ofp_print_table_desc_reply(string, oh);
+ break;
+
case OFPTYPE_HELLO:
ofp_print_hello(string, oh);
break;
diff --git a/lib/ofp-util.c b/lib/ofp-util.c
index a503818..755436c 100644
--- a/lib/ofp-util.c
+++ b/lib/ofp-util.c
@@ -4903,7 +4903,139 @@ ofputil_append_table_features_reply(const struct
ofputil_table_features *tf,
ofpmp_postappend(replies, start_ofs);
}
+/* Decodes the OpenFlow "table desc" message in '*msg' into an abstract form in
+ * '*td'. Returns 0 if successful, otherwise an OFPERR_* value. */
+int
+ofputil_decode_table_desc(struct ofpbuf *msg,
+ struct ofputil_table_desc *td)
+{
+ struct ofp14_table_desc *otd;
+ size_t length;
+ size_t property_length;
+
+ memset(td, 0, sizeof *td);
+
+ if (!msg->frame) {
+ ofpraw_pull_assert(msg);
+ }
+
+ if (!ofpbuf_size(msg)) {
+ return EOF;
+ }
+
+ otd = ofpbuf_try_pull(msg, sizeof *otd);
+
+ if (!otd) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFP14_TABLE_DESC reply has %"PRIu32" "
+ "leftover bytes at end", ofpbuf_size(msg));
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ td->table_id = otd->table_id;
+ td->config = ntohl(otd->config);
+ length = ntohs(otd->length);
+
+ if (length < sizeof *otd || length - sizeof *otd > ofpbuf_size(msg)) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFP14_TABLE_DESC reply claims invalid "
+ "length %"PRIuSIZE, length);
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ property_length = length - sizeof *otd;
+
+ while (property_length > 0) {
+ size_t prop_len;
+
+ if (td->config & OFPUTIL_TABLE_CONFIG_EVICTION) {
+ struct ofp14_table_mod_prop_eviction *ote;
+
+ ote = (property_length >= sizeof *ote
+ ? ofpbuf_try_pull(msg, sizeof *ote)
+ : NULL);
+
+ if (!ote) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "OFP14_TABLE_DESC property end
with"
+ "%"PRIuSIZE" leftover bytes", property_length);
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ prop_len = ntohs(ote->length);
+ if (prop_len != sizeof *ote) {
+ VLOG_WARN_RL(&bad_ofmsg_rl, "Table property length "
+ "%"PRIuSIZE" is not valid", prop_len);
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ td->eviction_flags = ntohl(ote->flags);
+ property_length = property_length - prop_len;
+ }
+ }
+
+ return 0;
+}
+
+/* Encodes and returns a request to obtain the table desc feature of a switch.
+ * The message is encoded for OpenFlow version 'ofp_version'.*/
+struct ofpbuf *
+ofputil_encode_table_desc_request(enum ofp_version ofp_version)
+{
+ struct ofpbuf *request = NULL;
+
+ if (ofp_version >= OFP14_VERSION) {
+ request = ofpraw_alloc(OFPRAW_OFPST14_TABLE_DESC_REQUEST,
+ ofp_version, 0);
+ } else {
+ ovs_fatal(0, "dump-table-desc needs OpenFlow 1.4 or later "
+ "(\'-O OpenFlow14\')");
+ }
+
+ return request;
+}
+
+/* Function to append Table desc information in a reply list. */
+void
+ofputil_append_table_desc_reply(const struct ofputil_table_desc *td,
+ struct ovs_list *replies)
+{
+ struct ofpbuf *reply = ofpbuf_from_list(list_back(replies));
+ size_t start_otd;
+ struct ofp14_table_desc *otd;
+
+ start_otd = ofpbuf_size(reply);
+ ofpbuf_put_zeros(reply, sizeof *otd);
+ if (td->config & OFPUTIL_TABLE_CONFIG_EVICTION) {
+ struct ofp14_table_mod_prop_eviction *ote;
+ size_t start_ote;
+
+ start_ote = ofpbuf_size(reply);
+ ofpbuf_put_zeros(reply, sizeof *ote);
+ ote = ofpbuf_at_assert(reply, start_ote, sizeof *ote);
+ ote->type = htons(OFPTMPT14_EVICTION);
+ ote->length = htons(ofpbuf_size(reply) - start_ote);
+ ote->flags = htonl(td->eviction_flags);
+ }
+
+ otd = ofpbuf_at_assert(reply, start_otd, sizeof *otd);
+ otd->length = htons(ofpbuf_size(reply) - start_otd);
+ otd->table_id = td->table_id;
+ otd->config = htonl(td->config);
+ ofpmp_postappend(replies, start_otd);
+}
+
/* ofputil_table_mod */
+static enum ofperr
+parse_table_mod_eviction_property(struct ofpbuf *property,
+ struct ofputil_table_mod *tm)
+{
+ struct ofp14_table_mod_prop_eviction *ote = ofpbuf_data(property);
+
+ if (ofpbuf_size(property) != sizeof *ote) {
+ return OFPERR_OFPBRC_BAD_LEN;
+ }
+
+ tm->eviction_flags = ntohl(ote->flags);
+ return 0;
+}
/* Given 'config', taken from an OpenFlow 'version' message that specifies
* table configuration (a table mod, table stats, or table features message),
@@ -4968,6 +5100,7 @@ ofputil_decode_table_mod(const struct ofp_header *oh,
enum ofpraw raw;
struct ofpbuf b;
+ memset(pm, 0, sizeof *pm);
ofpbuf_use_const(&b, oh, ntohs(oh->length));
raw = ofpraw_pull_assert(&b);
@@ -4983,8 +5116,33 @@ ofputil_decode_table_mod(const struct ofp_header *oh,
pm->table_id = otm->table_id;
pm->miss_config = ofputil_table_miss_from_config(otm->config,
oh->version);
+ pm->config = ntohl(otm->config);
/* We do not understand any properties yet, so we do not bother
* parsing them. */
+ while (ofpbuf_size(&b) > 0) {
+ struct ofpbuf property;
+ enum ofperr error;
+ uint16_t type;
+
+ error = ofputil_pull_property(&b, &property, &type);
+ if (error) {
+ return error;
+ }
+
+ switch (type) {
+ case OFPTMPT14_EVICTION:
+ error = parse_table_mod_eviction_property(&property, pm);
+ break;
+
+ default:
+ error = OFPERR_OFPBRC_BAD_TYPE;
+ break;
+ }
+
+ if (error) {
+ return error;
+ }
+ }
} else {
return OFPERR_OFPBRC_BAD_TYPE;
}
@@ -5023,12 +5181,24 @@ ofputil_encode_table_mod(const struct ofputil_table_mod
*pm,
case OFP14_VERSION:
case OFP15_VERSION: {
struct ofp14_table_mod *otm;
+ struct ofp14_table_mod_prop_eviction *ote;
+ ovs_be32 miss_config, config;
b = ofpraw_alloc(OFPRAW_OFPT14_TABLE_MOD, ofp_version, 0);
- otm = ofpbuf_put_zeros(b, sizeof *otm);
- otm->table_id = pm->table_id;
- otm->config = ofputil_table_miss_to_config(pm->miss_config,
+ otm = ofpbuf_put_zeros(b, sizeof *otm);
+ otm->table_id = pm->table_id;
+ miss_config = ofputil_table_miss_to_config(pm->miss_config,
ofp_version);
+ config = htonl(pm->config);
+ otm->config = config | miss_config;
+
+ if (pm->config & OFPUTIL_TABLE_CONFIG_EVICTION) {
+ ote = ofpbuf_put_zeros(b, sizeof *ote);
+ ote->type = htons(OFPTMPT14_EVICTION);
+ ote->length = htons(sizeof *ote);
+ ote->flags = htonl(OFPTMPEF14_IMPORTANCE);
+ }
+
break;
}
default:
@@ -8536,6 +8706,7 @@ ofputil_is_bundlable(enum ofptype type)
case OFPTYPE_AGGREGATE_STATS_REQUEST:
case OFPTYPE_TABLE_STATS_REQUEST:
case OFPTYPE_TABLE_FEATURES_STATS_REQUEST:
+ case OFPTYPE_TABLE_DESC_REQUEST:
case OFPTYPE_PORT_STATS_REQUEST:
case OFPTYPE_QUEUE_STATS_REQUEST:
case OFPTYPE_PORT_DESC_STATS_REQUEST:
@@ -8577,6 +8748,7 @@ ofputil_is_bundlable(enum ofptype type)
case OFPTYPE_METER_CONFIG_STATS_REPLY:
case OFPTYPE_METER_FEATURES_STATS_REPLY:
case OFPTYPE_TABLE_FEATURES_STATS_REPLY:
+ case OFPTYPE_TABLE_DESC_REPLY:
case OFPTYPE_ROLE_STATUS:
break;
}
diff --git a/lib/ofp-util.h b/lib/ofp-util.h
index df4d044..dbb2a15 100644
--- a/lib/ofp-util.h
+++ b/lib/ofp-util.h
@@ -606,13 +606,29 @@ enum ofputil_table_miss {
OFPUTIL_TABLE_MISS_DROP, /* Drop the packet. */
};
+/* Abstract version of OFPTC14_TABLE_CONFIG*.*/
+enum ofputil_table_config {
+ OFPUTIL_TABLE_CONFIG_DEFAULT = 1 << 0, /* Table Config default
behaviour*/
+ OFPUTIL_TABLE_CONFIG_NO_EVICTION = 1 << 1, /* No Eviction for Table*/
+ OFPUTIL_TABLE_CONFIG_EVICTION = 1 << 2, /* Eviction for importance
Configured */
+};
+
ovs_be32 ofputil_table_miss_to_config(enum ofputil_table_miss,
enum ofp_version);
/* Abstract ofp_table_mod. */
struct ofputil_table_mod {
uint8_t table_id; /* ID of the table, 0xff indicates all tables. */
+ enum ofputil_table_config config;
enum ofputil_table_miss miss_config;
+ uint32_t eviction_flags;
+};
+
+/* Abstract ofp14_table_desc. */
+struct ofputil_table_desc {
+ uint8_t table_id; /* ID of the table. */
+ enum ofputil_table_config config;
+ uint32_t eviction_flags;
};
enum ofperr ofputil_decode_table_mod(const struct ofp_header *,
@@ -681,11 +697,20 @@ struct ofputil_table_features {
int ofputil_decode_table_features(struct ofpbuf *,
struct ofputil_table_features *, bool loose);
+
+int ofputil_decode_table_desc(struct ofpbuf *,
+ struct ofputil_table_desc *);
+
struct ofpbuf *ofputil_encode_table_features_request(enum ofp_version);
+struct ofpbuf *ofputil_encode_table_desc_request(enum ofp_version);
+
void ofputil_append_table_features_reply(
const struct ofputil_table_features *tf, struct ovs_list *replies);
+void ofputil_append_table_desc_reply(
+ const struct ofputil_table_desc *td, struct ovs_list *replies);
+
/* Meter band configuration for all supported band types. */
struct ofputil_meter_band {
uint16_t type;
@@ -812,6 +837,9 @@ struct ofputil_table_stats {
};
struct ofpbuf *ofputil_encode_table_stats_reply(const struct ofp_header *rq);
+
+struct ofpbuf *ofputil_encode_table_desc_reply(const struct ofp_header *rq);
+
void ofputil_append_table_stats_reply(struct ofpbuf *reply,
const struct ofputil_table_stats *,
const struct ofputil_table_features *);
diff --git a/lib/rconn.c b/lib/rconn.c
index 625cb68..aa306b6 100644
--- a/lib/rconn.c
+++ b/lib/rconn.c
@@ -1365,6 +1365,8 @@ is_admitted_msg(const struct ofpbuf *b)
case OFPTYPE_GROUP_FEATURES_STATS_REPLY:
case OFPTYPE_TABLE_FEATURES_STATS_REQUEST:
case OFPTYPE_TABLE_FEATURES_STATS_REPLY:
+ case OFPTYPE_TABLE_DESC_REQUEST:
+ case OFPTYPE_TABLE_DESC_REPLY:
return false;
case OFPTYPE_PACKET_IN:
diff --git a/ofproto/ofproto-provider.h b/ofproto/ofproto-provider.h
index a0d556a..22a274a 100644
--- a/ofproto/ofproto-provider.h
+++ b/ofproto/ofproto-provider.h
@@ -243,6 +243,8 @@ struct oftable {
/* Table configuration. */
ATOMIC(enum ofputil_table_miss) miss_config;
+ ATOMIC(enum ofputil_table_config) config;
+ uint32_t eviction_flags; /* Flags of value OFPTMPEF14_* */
atomic_ulong n_matched;
atomic_ulong n_missed;
diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index 4601670..d5160ed 100644
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -69,6 +69,8 @@ COVERAGE_DEFINE(ofproto_recv_openflow);
COVERAGE_DEFINE(ofproto_reinit_ports);
COVERAGE_DEFINE(ofproto_update_port);
+# define CLEAR_EVICTION_BIT 0x8
+
/* Default fields to use for prefix tries in each flow table, unless something
* else is configured. */
const enum mf_field_id default_prefix_fields[2] =
@@ -88,6 +90,8 @@ static void oftable_enable_eviction(struct oftable *,
const struct mf_subfield *fields,
size_t n_fields);
+static void enable_eviction_for_importance(struct oftable *);
+
static void oftable_remove_rule(struct rule *rule) OVS_REQUIRES(ofproto_mutex);
/* A set of rules within a single OpenFlow table (oftable) that have the same
@@ -1302,7 +1306,7 @@ ofproto_configure_table(struct ofproto *ofproto, int
table_id,
return;
}
- if (s->groups) {
+ if (s->groups || (table->config & OFPUTIL_TABLE_CONFIG_EVICTION)) {
oftable_enable_eviction(table, s->groups, s->n_groups);
} else {
oftable_disable_eviction(table);
@@ -3349,6 +3353,48 @@ handle_table_features_request(struct ofconn *ofconn,
return 0;
}
+/* This function queries the database for dumping table-desc*/
+static void
+query_tables_desc(struct ofproto *ofproto,
+ struct ofputil_table_desc **descp)
+{
+ struct ofputil_table_desc *table_desc;
+ size_t i;
+ table_desc = *descp = xcalloc(ofproto->n_tables, sizeof *table_desc);
+ for (i = 0; i < ofproto->n_tables; i++) {
+ struct ofputil_table_desc *td = &table_desc[i];
+ td->table_id = i;
+ atomic_read_relaxed(&ofproto->tables[i].config, &td->config);
+ if (td->config & OFPUTIL_TABLE_CONFIG_EVICTION) {
+ td->eviction_flags = ofproto->tables[i].eviction_flags;
+ }
+ }
+}
+
+/* Function to handle dump-table-desc request */
+static enum ofperr
+handle_table_desc_request(struct ofconn *ofconn,
+ const struct ofp_header *request)
+{
+ struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
+ struct ofputil_table_desc *table_desc;
+ struct ovs_list replies;
+ size_t i;
+
+ query_tables_desc(ofproto, &table_desc);
+
+ ofpmp_init(&replies, request);
+ for (i = 0; i < ofproto->n_tables; i++) {
+ if (!(ofproto->tables[i].flags & OFTABLE_HIDDEN)) {
+ ofputil_append_table_desc_reply(&table_desc[i], &replies);
+ }
+ }
+ ofconn_send_replies(ofconn, &replies);
+ free(table_desc);
+
+ return 0;
+}
+
static void
append_port_stat(struct ofport *port, struct ovs_list *replies)
{
@@ -6175,26 +6221,89 @@ ofproto_table_get_miss_config(const struct ofproto
*ofproto, uint8_t table_id)
return value;
}
+/* This function configures or deconfigures eviction for all tables or
+ * for given table-id
+ * CLEAR_EVICTION_BIT - BIT-MASK for clearing the eviction/noeviction
+ * configuration and will have significance for other table configuartion
+ * properties */
+static void configure_eviction(const struct ofputil_table_mod *tm,
+ struct ofproto *ofproto)
+{
+ enum ofputil_table_config table_config;
+ if (tm->table_id == OFPTT_ALL) {
+ int i;
+ for (i = 0; i < ofproto->n_tables; i++) {
+ atomic_read_relaxed(&ofproto->tables[i].config, &table_config);
+ table_config = table_config & CLEAR_EVICTION_BIT;
+ table_config = table_config | tm->config;
+ atomic_store_relaxed(&ofproto->tables[i].config,
+ table_config);
+ ofproto->tables[i].eviction_flags = tm->eviction_flags;
+ if (tm->config & OFPUTIL_TABLE_CONFIG_EVICTION) {
+ enable_eviction_for_importance(&ofproto->tables[i]);
+ } else if (tm->config & OFPUTIL_TABLE_CONFIG_NO_EVICTION) {
+ oftable_disable_eviction(&ofproto->tables[i]);
+ }
+ }
+ } else {
+ atomic_read_relaxed(&ofproto->tables[tm->table_id].config,
+ &table_config);
+ table_config = table_config & CLEAR_EVICTION_BIT;
+ table_config = table_config | tm->config;
+ atomic_store_relaxed(&ofproto->tables[tm->table_id].config,
+ table_config);
+ ofproto->tables[tm->table_id].eviction_flags = tm->eviction_flags;
+ if (tm->config & OFPUTIL_TABLE_CONFIG_EVICTION) {
+ enable_eviction_for_importance(&ofproto->tables[tm->table_id]);
+ } else if (tm->config & OFPUTIL_TABLE_CONFIG_NO_EVICTION) {
+ oftable_disable_eviction(&ofproto->tables[tm->table_id]);
+ }
+ }
+}
+
+/* OFPUTIL_TABLE_CONFIG_NO_EVICTION and OFPUTIL_TABLE_CONFIG_DEFAULT
+ * these two values are considered different because we have to understand in
switch
+ * that user wants to disable Eviction by explicitly giving Noevict or no
value is passed
+ * at all which is default case */
static enum ofperr
table_mod(struct ofproto *ofproto, const struct ofputil_table_mod *tm)
{
if (!check_table_id(ofproto, tm->table_id)) {
return OFPERR_OFPTMFC_BAD_TABLE;
- } else if (tm->miss_config != OFPUTIL_TABLE_MISS_DEFAULT) {
+ }
+
+ if ((tm->config & OFPUTIL_TABLE_CONFIG_EVICTION) ||
+ (tm->config & OFPUTIL_TABLE_CONFIG_NO_EVICTION)) {
+ configure_eviction(tm, ofproto);
+ }
+
+ if (tm->miss_config != OFPUTIL_TABLE_MISS_DEFAULT) {
if (tm->table_id == OFPTT_ALL) {
int i;
for (i = 0; i < ofproto->n_tables; i++) {
atomic_store_relaxed(&ofproto->tables[i].miss_config,
tm->miss_config);
+ }
+ } else {
+ atomic_store_relaxed(&ofproto->tables[tm->table_id].miss_config,
+ tm->miss_config);
}
- } else {
- atomic_store_relaxed(&ofproto->tables[tm->table_id].miss_config,
- tm->miss_config);
- }
}
return 0;
}
+/* This function is only used when eviction is performed on the
+ basis of importance. This function enables eviction on a particular table
given */
+static void
+enable_eviction_for_importance(struct oftable *tables)
+{
+ struct mf_subfield *field = NULL;
+ size_t n_field = 0;
+
+ field = xmalloc(n_field* sizeof *field);
+ oftable_enable_eviction(tables, field, n_field);
+}
+
static enum ofperr
handle_table_mod(struct ofconn *ofconn, const struct ofp_header *oh)
{
@@ -6392,6 +6501,9 @@ handle_openflow__(struct ofconn *ofconn, const struct
ofpbuf *msg)
case OFPTYPE_TABLE_FEATURES_STATS_REQUEST:
return handle_table_features_request(ofconn, oh);
+ case OFPTYPE_TABLE_DESC_REQUEST:
+ return handle_table_desc_request(ofconn, oh);
+
case OFPTYPE_PORT_STATS_REQUEST:
return handle_port_stats_request(ofconn, oh);
@@ -6457,6 +6569,7 @@ handle_openflow__(struct ofconn *ofconn, const struct
ofpbuf *msg)
case OFPTYPE_METER_CONFIG_STATS_REPLY:
case OFPTYPE_METER_FEATURES_STATS_REPLY:
case OFPTYPE_TABLE_FEATURES_STATS_REPLY:
+ case OFPTYPE_TABLE_DESC_REPLY:
case OFPTYPE_ROLE_STATUS:
default:
if (ofpmsg_is_stat_request(oh)) {
@@ -6710,7 +6823,7 @@ eviction_group_find(struct oftable *table, uint32_t id)
/* Returns an eviction priority for 'rule'. The return value should be
* interpreted so that higher priorities make a rule more attractive candidates
* for eviction.
- * Called only if have a timeout. */
+ * Called if have a timeout and for eviction on basis of importance */
static uint32_t
rule_eviction_priority(struct ofproto *ofproto, struct rule *rule)
OVS_REQUIRES(ofproto_mutex)
@@ -6718,12 +6831,30 @@ rule_eviction_priority(struct ofproto *ofproto, struct
rule *rule)
long long int expiration = LLONG_MAX;
long long int modified;
uint32_t expiration_offset;
+ struct oftable *table = &ofproto->tables[rule->table_id];
+ bool has_eviction_by_importance;
/* 'modified' needs protection even when we hold 'ofproto_mutex'. */
ovs_mutex_lock(&rule->mutex);
modified = rule->modified;
ovs_mutex_unlock(&rule->mutex);
+ /* For eviction on basis of importance only those entries will be added
+ * which have eviction fields set, importance parameter given in flow
+ * entry and table config parameter for eviction is set. */
+ has_eviction_by_importance = (table->eviction_fields &&
+ rule->importance &&
+ (table->config &
+ OFPUTIL_TABLE_CONFIG_EVICTION));
+
+ /* As per the openflow specification 1.4, flow entries with lesser
importance
+ * will be evicted before flow entries with higher importance.So invert the
+ * value of importance for calculating the rule eviction priority as higher
+ * priorities make a rule more attractive candidates for eviction. */
+ if (has_eviction_by_importance) {
+ return UINT32_MAX - (rule->importance);
+ }
+
if (rule->hard_timeout) {
expiration = modified + rule->hard_timeout * 1000;
}
@@ -6765,12 +6896,22 @@ eviction_group_add_rule(struct rule *rule)
struct ofproto *ofproto = rule->ofproto;
struct oftable *table = &ofproto->tables[rule->table_id];
bool has_timeout;
+ bool has_eviction_by_importance;
/* Timeouts may be modified only when holding 'ofproto_mutex'. We have it
* so no additional protection is needed. */
has_timeout = rule->hard_timeout || rule->idle_timeout;
- if (table->eviction_fields && has_timeout) {
+ /* For eviction on basis of importance only those entries will be added
+ * which have eviction fields set, importance parameter is not zero in flow
+ * entry and table config parameter for eviction is set. All rules are added
+ * in a single group when eviction is done on basis of importance. */
+ has_eviction_by_importance = (table->eviction_fields &&
+ rule->importance &&
+ (table->config &
+ OFPUTIL_TABLE_CONFIG_EVICTION));
+
+ if ((table->eviction_fields && has_timeout) || has_eviction_by_importance)
{
struct eviction_group *evg;
evg = eviction_group_find(table, eviction_group_hash_rule(rule));
@@ -6792,6 +6933,7 @@ oftable_init(struct oftable *table)
classifier_init(&table->cls, flow_segment_u64s);
table->max_flows = UINT_MAX;
atomic_init(&table->miss_config, OFPUTIL_TABLE_MISS_DEFAULT);
+ atomic_init(&table->config, OFPUTIL_TABLE_CONFIG_DEFAULT);
classifier_set_prefix_fields(&table->cls, default_prefix_fields,
ARRAY_SIZE(default_prefix_fields));
diff --git a/tests/ofp-print.at b/tests/ofp-print.at
index dc809e2..6753e21 100644
--- a/tests/ofp-print.at
+++ b/tests/ofp-print.at
@@ -1133,6 +1133,7 @@ AT_CHECK([ovs-ofctl ofp-print "\
05 11 00 10 00 00 00 02 02 00 00 00 00 00 00 00 \
" 3], [0], [dnl
OFPT_TABLE_MOD (OF1.4) (xid=0x2): table_id=2
+ config = No Eviction
])
AT_CLEANUP
diff --git a/tests/ofproto.at b/tests/ofproto.at
index 2a2111f..1732083 100644
--- a/tests/ofproto.at
+++ b/tests/ofproto.at
@@ -1568,6 +1568,111 @@ AT_CHECK([ovs-ofctl -O OpenFlow13 dump-table-features
br0 | sed '/^$/d
OVS_VSWITCHD_STOP
AT_CLEANUP
+AT_SETUP([ofproto - table description (OpenFlow 1.4)])
+OVS_VSWITCHD_START
+(x=0
+ while test $x -lt 254; do
+ y=`expr $x + 1`
+ echo " table $x:
+ config = No Eviction"
+ x=$y
+ done) > expout
+AT_CHECK([ovs-ofctl -O OpenFlow14 dump-table-desc br0 | sed '/^$/d
+/^OFPST_TABLE_DESC/d'], [0], [expout])
+
+# Change the configuration.
+AT_CHECK([ovs-ofctl -O Openflow14 mod-table br0 0 evict])
+# Check that the configuration was updated.
+mv expout orig-expout
+FLAG_STRING=" flag: Importance"
+sed -e "2s/No Eviction/Eviction/
+2s/$/$FLAG_STRING/" <orig-expout > expout
+AT_CHECK([ovs-ofctl -O OpenFlow14 dump-table-desc br0 | sed '/^$/d
+/^OFPST_TABLE_DESC/d'], [0], [expout])
+OVS_VSWITCHD_STOP
+AT_CLEANUP
+
+AT_SETUP([ofproto - eviction using importance upon table overflow (OpenFlow
1.4)])
+OVS_VSWITCHD_START
+# Configure a maximum of 4 flows.
+AT_CHECK(
+ [ovs-vsctl \
+ -- --id=@t0 create Flow_Table flow-limit=4 \
+ -- set bridge br0 flow_tables:0=@t0 \
+ | ${PERL} $srcdir/uuidfilt.pl],
+ [0], [<0>
+])
+# set the Eviction configuration.
+AT_CHECK([ovs-ofctl -O Openflow14 mod-table br0 0 evict])
+# Add 4 flows.
+for in_port in 4 3 2 1; do
+ ovs-ofctl -O Openflow14 add-flow br0 importance=$((in_port +
30)),priority=$((in_port + 5)),hard_timeout=$((in_port + 500)),actions=drop
+done
+AT_CHECK([ovs-ofctl -O Openflow14 dump-flows br0 | ofctl_strip | sort], [0],
[dnl
+ hard_timeout=501, importance=31, priority=6 actions=drop
+ hard_timeout=502, importance=32, priority=7 actions=drop
+ hard_timeout=503, importance=33, priority=8 actions=drop
+ hard_timeout=504, importance=34, priority=9 actions=drop
+OFPST_FLOW reply (OF1.4):
+])
+# Adding another flow will cause the one with lowest importance to be evicted.
+AT_CHECK([ovs-ofctl -O Openflow14 add-flow br0
hard_timeout=505,importance=35,priority=10,in_port=2,actions=drop])
+AT_CHECK([ovs-ofctl -O Openflow14 dump-flows br0 | ofctl_strip | sort], [0],
[dnl
+ hard_timeout=502, importance=32, priority=7 actions=drop
+ hard_timeout=503, importance=33, priority=8 actions=drop
+ hard_timeout=504, importance=34, priority=9 actions=drop
+ hard_timeout=505, importance=35, priority=10,in_port=2 actions=drop
+OFPST_FLOW reply (OF1.4):
+])
+# Disable the Eviction configuration.
+AT_CHECK([ovs-ofctl -O Openflow14 mod-table br0 0 noevict])
+# Adding another flow will cause the system to give error for FULL TABLE.
+AT_CHECK([ovs-ofctl -O Openflow14 add-flow br0
hard_timeout=506,importance=36,priority=11,actions=drop],[1], [], [stderr])
+AT_CHECK([head -n 1 stderr | ofctl_strip], [0],
+ [OFPT_ERROR (OF1.4): OFPFMFC_TABLE_FULL
+])
+#Dump flows. It should show only the old values
+AT_CHECK([ovs-ofctl -O Openflow14 dump-flows br0 | ofctl_strip | sort], [0],
[dnl
+ hard_timeout=502, importance=32, priority=7 actions=drop
+ hard_timeout=503, importance=33, priority=8 actions=drop
+ hard_timeout=504, importance=34, priority=9 actions=drop
+ hard_timeout=505, importance=35, priority=10,in_port=2 actions=drop
+OFPST_FLOW reply (OF1.4):
+])
+# mod-flow that would modify a flow will be done successfully.
+AT_CHECK([ovs-ofctl -O Openflow14 mod-flows br0 in_port=2,actions=NORMAL])
+AT_CHECK([ovs-ofctl -O Openflow14 dump-flows br0 | ofctl_strip | sort], [0],
[dnl
+ hard_timeout=502, importance=32, priority=7 actions=drop
+ hard_timeout=503, importance=33, priority=8 actions=drop
+ hard_timeout=504, importance=34, priority=9 actions=drop
+ hard_timeout=505, importance=35, priority=10,in_port=2 actions=NORMAL
+OFPST_FLOW reply (OF1.4):
+])
+# Also a mod-flow that would add a flow will be refused.
+AT_CHECK([ovs-ofctl mod-flows br0 in_port=5,actions=drop], [1], [], [stderr])
+AT_CHECK([head -n 1 stderr | ofctl_strip], [0],
+ [OFPT_ERROR: OFPFMFC_TABLE_FULL
+])
+# Now set the eviction on timeout basis.
+AT_CHECK(
+ [ovs-vsctl \
+ -- --id=@t0 create Flow_Table flow-limit=4 overflow-policy=evict \
+ -- set bridge br0 flow_tables:0=@t0 \
+ | ${PERL} $srcdir/uuidfilt.pl],
+ [0], [<0>
+])
+#Now add a new flow
+AT_CHECK([ovs-ofctl -O Openflow14 add-flow br0
importance=37,hard_timeout=507,priority=11,in_port=6,actions=drop])
+AT_CHECK([ovs-ofctl -O Openflow14 dump-flows br0 | ofctl_strip | sort], [0],
[dnl
+ hard_timeout=503, importance=33, priority=8 actions=drop
+ hard_timeout=504, importance=34, priority=9 actions=drop
+ hard_timeout=505, importance=35, priority=10,in_port=2 actions=NORMAL
+ hard_timeout=507, importance=37, priority=11,in_port=6 actions=drop
+OFPST_FLOW reply (OF1.4):
+])
+OVS_VSWITCHD_STOP
+AT_CLEANUP
+
AT_SETUP([ofproto - hard limits on flow table size (OpenFlow 1.0)])
OVS_VSWITCHD_START
# Configure a maximum of 4 flows.
diff --git a/utilities/ovs-ofctl.8.in b/utilities/ovs-ofctl.8.in
index b73c24c..2a2305c 100644
--- a/utilities/ovs-ofctl.8.in
+++ b/utilities/ovs-ofctl.8.in
@@ -62,8 +62,14 @@ Prints to the console statistics for each of the flow tables
used by
\fBdump\-table\-features \fIswitch\fR
Prints to the console features for each of the flow tables used by
\fIswitch\fR.
+.TP
+\fBdump\-table\-desc \fIswitch\fR
+Prints to the console configuration for each of the flow tables used
+by \fIswitch\fR for OpenFlow 1.4+.
.
-.IP "\fBmod\-table \fIswitch\fR \fItable_id\fR \fIflow_miss_handling\fR"
+.IP "\fBmod\-table \fIswitch\fR \fItable_id\fR \fIflow_miss_handling/config\fR"
+.RS
+.IP \fIflow_miss_handling\fR
An OpenFlow 1.0 switch looks up each packet that arrives at the switch
in table 0, then in table 1 if there is no match in table 0, then in
table 2, and so on until the packet finds a match in some table.
@@ -87,6 +93,23 @@ tables other than the last one.)
Send to controller. (This is how an OpenFlow 1.0 switch always
handles packets that do not match any flow in the last table.)
.RE
+.IP \fIconfig\fR
+An OpenFlow 1.4+ switch configures the behaviour of the table when the
+table is full.
+.IP
+This command configures the flow table configuration for table
+\fItable_id\fR in \fIswitch\fR. \fItable_id\fR may be an OpenFlow
+table number between 0 and 254, inclusive, or the keyword \fBALL\fR to
+modify all tables. \fIconfig\fR may be any one of the following:
+.RS
+.IP \fBevict\fR
+Enable eviction on \fItable_id\fR of \fIswitch\fR on the basis of
+importance.
+.IP \fBnoevict\fR
+Disable eviction on \fItable_id\fR of \fIswitch\fR on the basis of
+importance.
+.RE
+.RE
.
.TP
\fBdump\-ports \fIswitch\fR [\fInetdev\fR]
diff --git a/utilities/ovs-ofctl.c b/utilities/ovs-ofctl.c
index b5ace5a..7278674 100644
--- a/utilities/ovs-ofctl.c
+++ b/utilities/ovs-ofctl.c
@@ -316,6 +316,7 @@ usage(void)
" dump-desc SWITCH print switch description\n"
" dump-tables SWITCH print table stats\n"
" dump-table-features SWITCH print table features\n"
+ " dump-tables-desc SWITCH print table description\n"
" mod-port SWITCH IFACE ACT modify port behavior\n"
" mod-table SWITCH MOD modify flow table behavior\n"
" get-frags SWITCH print fragment handling behavior\n"
@@ -701,6 +702,24 @@ ofctl_dump_table_features(int argc OVS_UNUSED, char
*argv[])
vconn_close(vconn);
}
+/* ovs-ofctl dump-table-desc provides a way to list the current configuration
of
+ * the tables on a switch, which is set using the ovs-ofctl table-mod command.
*/
+static void
+ofctl_dump_table_desc(int argc OVS_UNUSED, char *argv[])
+{
+ struct ofpbuf *request;
+ struct vconn *vconn;
+
+ open_vconn(argv[1], &vconn);
+ request = ofputil_encode_table_desc_request(vconn_get_version(vconn));
+ if (request) {
+ dump_stats_transaction(vconn, request);
+ }
+
+ vconn_close(vconn);
+}
+
+
static bool fetch_port_by_stats(struct vconn *,
const char *port_name, ofp_port_t port_no,
struct ofputil_phy_port *);
@@ -3496,6 +3515,8 @@ static const struct command all_commands[] = {
1, 1, ofctl_dump_tables },
{ "dump-table-features", "switch",
1, 1, ofctl_dump_table_features },
+ { "dump-table-desc", "switch",
+ 1, 1, ofctl_dump_table_desc},
{ "dump-flows", "switch",
1, 2, ofctl_dump_flows },
{ "dump-aggregate", "switch",
--
2.3.0
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