--- /dev/null
+/* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ *
+ * 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 "ofproto-dpif-mirror.h"
+
+#include <errno.h>
+
+#include "hmap.h"
+#include "hmapx.h"
+#include "ofproto.h"
+#include "vlan-bitmap.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(ofproto_dpif_mirror);
+
+#define MIRROR_MASK_C(X) UINT32_C(X)
+BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS);
+
+struct mbridge {
+ struct mirror *mirrors[MAX_MIRRORS];
+ struct hmap mbundles;
+
+ bool need_revalidate;
+ bool has_mirrors;
+
+ int ref_cnt;
+};
+
+struct mbundle {
+ struct hmap_node hmap_node; /* In parent 'mbridge' map. */
+ struct ofbundle *ofbundle;
+
+ mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */
+ mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */
+ mirror_mask_t mirror_out; /* Mirrors that output to this mbundle. */
+};
+
+struct mirror {
+ struct mbridge *mbridge; /* Owning ofproto. */
+ size_t idx; /* In ofproto's "mirrors" array. */
+ void *aux; /* Key supplied by ofproto's client. */
+
+ /* Selection criteria. */
+ struct hmapx srcs; /* Contains "struct mbundle*"s. */
+ struct hmapx dsts; /* Contains "struct mbundle*"s. */
+ unsigned long *vlans; /* Bitmap of chosen VLANs, NULL selects all. */
+
+ /* Output (exactly one of out == NULL and out_vlan == -1 is true). */
+ struct mbundle *out; /* Output port or NULL. */
+ int out_vlan; /* Output VLAN or -1. */
+ mirror_mask_t dup_mirrors; /* Bitmap of mirrors with the same output. */
+
+ /* Counters. */
+ int64_t packet_count; /* Number of packets sent. */
+ int64_t byte_count; /* Number of bytes sent. */
+};
+
+static struct mirror *mirror_lookup(struct mbridge *, void *aux);
+static struct mbundle *mbundle_lookup(const struct mbridge *,
+ struct ofbundle *);
+static void mbundle_lookup_multiple(const struct mbridge *, struct ofbundle **,
+ size_t n_bundles, struct hmapx *mbundles);
+static int mirror_scan(struct mbridge *);
+static void mirror_update_dups(struct mbridge *);
+static int mirror_mask_ffs(mirror_mask_t);
+
+struct mbridge *
+mbridge_create(void)
+{
+ struct mbridge *mbridge;
+
+ mbridge = xzalloc(sizeof *mbridge);
+ mbridge->ref_cnt = 1;
+
+ hmap_init(&mbridge->mbundles);
+ return mbridge;
+}
+
+struct mbridge *
+mbridge_ref(const struct mbridge *mbridge_)
+{
+ struct mbridge *mbridge = CONST_CAST(struct mbridge *, mbridge_);
+ if (mbridge) {
+ ovs_assert(mbridge->ref_cnt > 0);
+ mbridge->ref_cnt++;
+ }
+ return mbridge;
+}
+
+void
+mbridge_unref(struct mbridge *mbridge)
+{
+ struct mbundle *mbundle, *next;
+ size_t i;
+
+ if (!mbridge) {
+ return;
+ }
+
+ ovs_assert(mbridge->ref_cnt > 0);
+ if (--mbridge->ref_cnt) {
+ return;
+ }
+
+ for (i = 0; i < MAX_MIRRORS; i++) {
+ if (mbridge->mirrors[i]) {
+ mirror_destroy(mbridge, mbridge->mirrors[i]->aux);
+ }
+ }
+
+ HMAP_FOR_EACH_SAFE (mbundle, next, hmap_node, &mbridge->mbundles) {
+ mbridge_unregister_bundle(mbridge, mbundle->ofbundle);
+ }
+
+ free(mbridge);
+}
+
+bool
+mbridge_has_mirrors(struct mbridge *mbridge)
+{
+ return mbridge ? mbridge->has_mirrors : false;
+}
+
+/* Returns true if configurations changes in 'mbridge''s mirrors require
+ * revalidation. */
+bool
+mbridge_need_revalidate(struct mbridge *mbridge)
+{
+ return mbridge->need_revalidate;
+}
+
+void
+mbridge_register_bundle(struct mbridge *mbridge, struct ofbundle *ofbundle)
+{
+ struct mbundle *mbundle;
+
+ mbundle = xzalloc(sizeof *mbundle);
+ mbundle->ofbundle = ofbundle;
+ hmap_insert(&mbridge->mbundles, &mbundle->hmap_node,
+ hash_pointer(ofbundle, 0));
+}
+
+void
+mbridge_unregister_bundle(struct mbridge *mbridge, struct ofbundle *ofbundle)
+{
+ struct mbundle *mbundle = mbundle_lookup(mbridge, ofbundle);
+ size_t i;
+
+ if (!mbundle) {
+ return;
+ }
+
+ for (i = 0; i < MAX_MIRRORS; i++) {
+ struct mirror *m = mbridge->mirrors[i];
+ if (m) {
+ if (m->out == mbundle) {
+ mirror_destroy(mbridge, m->aux);
+ } else if (hmapx_find_and_delete(&m->srcs, mbundle)
+ || hmapx_find_and_delete(&m->dsts, mbundle)) {
+ mbridge->need_revalidate = true;
+ }
+ }
+ }
+
+ hmap_remove(&mbridge->mbundles, &mbundle->hmap_node);
+ free(mbundle);
+}
+
+mirror_mask_t
+mirror_bundle_out(struct mbridge *mbridge, struct ofbundle *ofbundle)
+{
+ struct mbundle *mbundle = mbundle_lookup(mbridge, ofbundle);
+ return mbundle ? mbundle->mirror_out : 0;
+}
+
+mirror_mask_t
+mirror_bundle_src(struct mbridge *mbridge, struct ofbundle *ofbundle)
+{
+ struct mbundle *mbundle = mbundle_lookup(mbridge, ofbundle);
+ return mbundle ? mbundle->src_mirrors : 0;
+}
+
+mirror_mask_t
+mirror_bundle_dst(struct mbridge *mbridge, struct ofbundle *ofbundle)
+{
+ struct mbundle *mbundle = mbundle_lookup(mbridge, ofbundle);
+ return mbundle ? mbundle->dst_mirrors : 0;
+}
+
+int
+mirror_set(struct mbridge *mbridge, void *aux, const char *name,
+ struct ofbundle **srcs, size_t n_srcs,
+ struct ofbundle **dsts, size_t n_dsts,
+ unsigned long *src_vlans, struct ofbundle *out_bundle,
+ uint16_t out_vlan)
+{
+ struct mbundle *mbundle, *out;
+ mirror_mask_t mirror_bit;
+ struct mirror *mirror;
+ struct hmapx srcs_map; /* Contains "struct ofbundle *"s. */
+ struct hmapx dsts_map; /* Contains "struct ofbundle *"s. */
+
+ mirror = mirror_lookup(mbridge, aux);
+ if (!mirror) {
+ int idx;
+
+ idx = mirror_scan(mbridge);
+ if (idx < 0) {
+ VLOG_WARN("maximum of %d port mirrors reached, cannot create %s",
+ MAX_MIRRORS, name);
+ return EFBIG;
+ }
+
+ mirror = mbridge->mirrors[idx] = xzalloc(sizeof *mirror);
+ mirror->mbridge = mbridge;
+ mirror->idx = idx;
+ mirror->aux = aux;
+ mirror->out_vlan = -1;
+ }
+
+ /* Get the new configuration. */
+ if (out_bundle) {
+ out = mbundle_lookup(mbridge, out_bundle);
+ if (!out) {
+ mirror_destroy(mbridge, mirror->aux);
+ return EINVAL;
+ }
+ out_vlan = -1;
+ } else {
+ out = NULL;
+ }
+ mbundle_lookup_multiple(mbridge, srcs, n_srcs, &srcs_map);
+ mbundle_lookup_multiple(mbridge, dsts, n_dsts, &dsts_map);
+
+ /* If the configuration has not changed, do nothing. */
+ if (hmapx_equals(&srcs_map, &mirror->srcs)
+ && hmapx_equals(&dsts_map, &mirror->dsts)
+ && vlan_bitmap_equal(mirror->vlans, src_vlans)
+ && mirror->out == out
+ && mirror->out_vlan == out_vlan)
+ {
+ hmapx_destroy(&srcs_map);
+ hmapx_destroy(&dsts_map);
+ return 0;
+ }
+
+ hmapx_swap(&srcs_map, &mirror->srcs);
+ hmapx_destroy(&srcs_map);
+
+ hmapx_swap(&dsts_map, &mirror->dsts);
+ hmapx_destroy(&dsts_map);
+
+ free(mirror->vlans);
+ mirror->vlans = vlan_bitmap_clone(src_vlans);
+
+ mirror->out = out;
+ mirror->out_vlan = out_vlan;
+
+ /* Update mbundles. */
+ mirror_bit = MIRROR_MASK_C(1) << mirror->idx;
+ HMAP_FOR_EACH (mbundle, hmap_node, &mirror->mbridge->mbundles) {
+ if (hmapx_contains(&mirror->srcs, mbundle)) {
+ mbundle->src_mirrors |= mirror_bit;
+ } else {
+ mbundle->src_mirrors &= ~mirror_bit;
+ }
+
+ if (hmapx_contains(&mirror->dsts, mbundle)) {
+ mbundle->dst_mirrors |= mirror_bit;
+ } else {
+ mbundle->dst_mirrors &= ~mirror_bit;
+ }
+
+ if (mirror->out == mbundle) {
+ mbundle->mirror_out |= mirror_bit;
+ } else {
+ mbundle->mirror_out &= ~mirror_bit;
+ }
+ }
+
+ mbridge->has_mirrors = true;
+ mirror_update_dups(mbridge);
+
+ return 0;
+}
+
+void
+mirror_destroy(struct mbridge *mbridge, void *aux)
+{
+ struct mirror *mirror = mirror_lookup(mbridge, aux);
+ mirror_mask_t mirror_bit;
+ struct mbundle *mbundle;
+ int i;
+
+ if (!mirror) {
+ return;
+ }
+
+ mirror_bit = MIRROR_MASK_C(1) << mirror->idx;
+ HMAP_FOR_EACH (mbundle, hmap_node, &mbridge->mbundles) {
+ mbundle->src_mirrors &= ~mirror_bit;
+ mbundle->dst_mirrors &= ~mirror_bit;
+ mbundle->mirror_out &= ~mirror_bit;
+ }
+
+ hmapx_destroy(&mirror->srcs);
+ hmapx_destroy(&mirror->dsts);
+ free(mirror->vlans);
+
+ mbridge->mirrors[mirror->idx] = NULL;
+ free(mirror);
+
+ mirror_update_dups(mbridge);
+
+ mbridge->has_mirrors = false;
+ for (i = 0; i < MAX_MIRRORS; i++) {
+ if (mbridge->mirrors[i]) {
+ mbridge->has_mirrors = true;
+ break;
+ }
+ }
+}
+
+int
+mirror_get_stats(struct mbridge *mbridge, void *aux, uint64_t *packets,
+ uint64_t *bytes)
+{
+ struct mirror *mirror = mirror_lookup(mbridge, aux);
+
+ if (!mirror) {
+ *packets = *bytes = UINT64_MAX;
+ return 0;
+ }
+
+ *packets = mirror->packet_count;
+ *bytes = mirror->byte_count;
+
+ return 0;
+}
+
+void
+mirror_update_stats(struct mbridge *mbridge, mirror_mask_t mirrors,
+ uint64_t packets, uint64_t bytes)
+{
+ if (!mbridge || !mirrors) {
+ return;
+ }
+
+ for (; mirrors; mirrors = zero_rightmost_1bit(mirrors)) {
+ struct mirror *m;
+
+ m = mbridge->mirrors[mirror_mask_ffs(mirrors) - 1];
+
+ if (!m) {
+ /* In normal circumstances 'm' will not be NULL. However,
+ * if mirrors are reconfigured, we can temporarily get out
+ * of sync in facet_revalidate(). We could "correct" the
+ * mirror list before reaching here, but doing that would
+ * not properly account the traffic stats we've currently
+ * accumulated for previous mirror configuration. */
+ continue;
+ }
+
+ m->packet_count += packets;
+ m->byte_count += bytes;
+ }
+}
+
+/* Retrieves the mirror in 'mbridge' represented by the first bet set of
+ * 'mirrors'. Returns true if such a mirror exists, false otherwise.
+ * The caller takes ownership of, and is expected to deallocate, 'vlans' */
+bool
+mirror_get(struct mbridge *mbridge, int index, unsigned long **vlans,
+ mirror_mask_t *dup_mirrors, struct ofbundle **out, int *out_vlan)
+{
+ struct mirror *mirror;
+
+ if (!mbridge) {
+ return false;
+ }
+
+ mirror = mbridge->mirrors[index];
+ if (!mirror) {
+ return false;
+ }
+
+ *vlans = vlan_bitmap_clone(mirror->vlans);
+ *dup_mirrors = mirror->dup_mirrors;
+ *out = mirror->out ? mirror->out->ofbundle : NULL;
+ *out_vlan = mirror->out_vlan;
+ return true;
+}
+\f
+/* Helpers. */
+
+static struct mbundle *
+mbundle_lookup(const struct mbridge *mbridge, struct ofbundle *ofbundle)
+{
+ struct mbundle *mbundle;
+
+ HMAP_FOR_EACH_IN_BUCKET (mbundle, hmap_node, hash_pointer(ofbundle, 0),
+ &mbridge->mbundles) {
+ if (mbundle->ofbundle == ofbundle) {
+ return mbundle;
+ }
+ }
+ return NULL;
+}
+
+/* Looks up each of the 'n_ofbundlees' pointers in 'ofbundlees' as mbundles and
+ * adds the ones that are found to 'mbundles'. */
+static void
+mbundle_lookup_multiple(const struct mbridge *mbridge,
+ struct ofbundle **ofbundles, size_t n_ofbundles,
+ struct hmapx *mbundles)
+{
+ size_t i;
+
+ hmapx_init(mbundles);
+ for (i = 0; i < n_ofbundles; i++) {
+ struct mbundle *mbundle = mbundle_lookup(mbridge, ofbundles[i]);
+ if (mbundle) {
+ hmapx_add(mbundles, mbundle);
+ }
+ }
+}
+
+static int
+mirror_scan(struct mbridge *mbridge)
+{
+ int idx;
+
+ for (idx = 0; idx < MAX_MIRRORS; idx++) {
+ if (!mbridge->mirrors[idx]) {
+ return idx;
+ }
+ }
+ return -1;
+}
+
+static struct mirror *
+mirror_lookup(struct mbridge *mbridge, void *aux)
+{
+ int i;
+
+ for (i = 0; i < MAX_MIRRORS; i++) {
+ struct mirror *mirror = mbridge->mirrors[i];
+ if (mirror && mirror->aux == aux) {
+ return mirror;
+ }
+ }
+
+ return NULL;
+}
+
+/* Update the 'dup_mirrors' member of each of the mirrors in 'ofproto'. */
+static void
+mirror_update_dups(struct mbridge *mbridge)
+{
+ int i;
+
+ for (i = 0; i < MAX_MIRRORS; i++) {
+ struct mirror *m = mbridge->mirrors[i];
+
+ if (m) {
+ m->dup_mirrors = MIRROR_MASK_C(1) << i;
+ }
+ }
+
+ for (i = 0; i < MAX_MIRRORS; i++) {
+ struct mirror *m1 = mbridge->mirrors[i];
+ int j;
+
+ if (!m1) {
+ continue;
+ }
+
+ for (j = i + 1; j < MAX_MIRRORS; j++) {
+ struct mirror *m2 = mbridge->mirrors[j];
+
+ if (m2 && m1->out == m2->out && m1->out_vlan == m2->out_vlan) {
+ m1->dup_mirrors |= MIRROR_MASK_C(1) << j;
+ m2->dup_mirrors |= m1->dup_mirrors;
+ }
+ }
+ }
+}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff