Hi Numan,

Thanks for your review.

On Fri, Nov 25, 2022 at 8:47 AM Numan Siddique <[email protected]> wrote:

> On Thu, Nov 24, 2022 at 9:14 AM Abhiram R N <[email protected]> wrote:
> >
> > Mirror creation just creates the mirror. The lsp-attach-mirror
> > triggers the sequence to create Mirror in OVS DB on compute node.
> > OVS already supports Port Mirroring.
> >
> > Note: This is targeted to mirror to destinations anywhere outside the
> > cluster where the analyser resides and it need not be an OVN node.
> >
> > Example commands are as below:
> >
> > Mirror creation
> > ovn-nbctl mirror-add mirror1 gre 0 from-lport 10.10.10.2
> >
> > Attach a logical port to the mirror.
> > ovn-nbctl lsp-attach-mirror sw0-port1 mirror1
> >
> > Detach a source from Mirror
> > ovn-nbctl lsp-detach-mirror sw0-port1 mirror1
> >
> > Mirror deletion
> > ovn-nbctl mirror-del mirror1
> >
> > Co-authored-by: Veda Barrenkala <[email protected]>
> > Signed-off-by: Veda Barrenkala <[email protected]>
> > Signed-off-by: Abhiram R N <[email protected]>
> > ---
> > v14 --> v15: Addressed comments of Ihar from v14 in function
> >              ovn_port_mirror_handle_lport (mirror.c)
> >              i.e. to have both mirror_delete AND mirror_create
> >              regardless of which case it is:
> >              n_mirror_rules == shash_count(), or <, or >.
> >
> > Ihar,
> >      Regarding the recomputes you asked I think we have to wait
> > for Numan's comments.
> >
>
>
> Hi Abhiram,
>
> Thanks for addressing the review comments and for your patience.
>
> I've a few comments about this patch.
>
> 1. This patch seems to be very big and it can be split into a couple of
> small
>    patches. I'd suggest you split into following patches
>    - Patch 1 can add the new schemas for port mirroring in both NB and SB
>      and ovn-nbctl related changes.
>    - Patch 2 - only ovn-northd changes which syncs the NB port mirrors to
>      SB port mirrrors.
>    - Patch 3 - ovn-controller changes which create ovs mirrors.
>
>  This would make reviewing the patch series easier. I'm sorry, I should've
>  asked you to split earlier.
>
Sure. I will split and send the next one. No issues.

>
>
> 2. The engine_node 'en_port_mirror' added in this patch is no way related
> to
>    flow output and it just syncs and creates OVS mirrors.
>    The mirror.c added in this patch is way too complicated and confusing.
> I'm
>    afraid it will be difficult to maintain it and enhance it.
>
>    Since it only syncs the SB mirrors to OVS mirrors, it seems to me
>    we can avoid the engine changes completely.
>    Instead I think we can do the mirror syncs similar to patch.c,
> chassis.c,
>    and encaps.c.
>
>    Please take a look at those files.
>    In the mirror.c we can have the below functions
>       - mirror_init()
>       - mirror_destroy()
>       - mirror_run() -> This function should first iterate over the SB
> mirrors,
>         OVS mirrors and local bindings and then create, update or delete
> the
>         ovs mirrors.
>    ovn-controller should call mirror_run() just like it calls
> patch_run(), encaps_run() etc.
>
>    The only drop back of this approach is that there is no incremental
> handling.
>    Whenever ovn-controller loop wakes up, it will call mirror_run().
>    I think this is ok to start with.  If there are scale concerns, we can
>    add engine support for the mirrors.  This can be a future task.
>
>    To start with and to make the implementation cleaner and less
> complicated
>    I'd suggest this.
>
Okay sure.

>
>    I'm sorry that I didn't provide these comments in my earlier reviews.
>    Earlier I thought it should be straightforward to add this feature using
>    the I-P engine.
>
> I did a quick implementation on top of your patch.  It can be found here
>   - https://github.com/numansiddique/ovn/commits/port_mirror_local_hack
>   -
> https://github.com/numansiddique/ovn/commit/615d28d4146964a5f6c7b7d58c9c947b363b0a7b
>
> I'd suggest you refer to this and use this.  Feel free to have your own
> implementation if you prefer.
>
Agreed, without the engine it's simpler. I took your patch and updated my
repo and tested it.
Only 1 issue I found.
Update of a single field of NB mirror was not getting propagated to OVS
mirror like below for example.
check ovn-nbctl set mirror . type=erspan

So I have modified ONLY below code by adding an 'else' part and
used the  function check_and_update_interface_table from old code to update
it.

Also retained function 'create_and_set_options' since create_ovs_mirror and
'check_and_update_interface_table' both need to set options now.
It's working as expected with the change below.

    if (m->sb_mirror && !m->ovs_mirror) {
        create_ovs_mirror(m, ovs_idl_txn, br_int);
    } else {
        /* Since mirror already exists in OVS, look for updates */
        check_and_update_interface_table(m->sb_mirror, m->ovs_mirror);
    }

Apart from that I didn't find any issue as of now.

I will do a little bit more testing and re-submit the patch set

Thanks & Regards,
Abhiram R N


> Thanks
> Numan
>
> >  NEWS                        |   1 +
> >  controller/automake.mk      |   4 +-
> >  controller/mirror.c         | 550 ++++++++++++++++++++++++++++++++++++
> >  controller/mirror.h         |  53 ++++
> >  controller/ovn-controller.c | 265 +++++++++++++++--
> >  northd/en-northd.c          |   4 +
> >  northd/inc-proc-northd.c    |   4 +
> >  northd/northd.c             | 172 +++++++++++
> >  northd/northd.h             |   2 +
> >  ovn-nb.ovsschema            |  31 +-
> >  ovn-nb.xml                  |  63 +++++
> >  ovn-sb.ovsschema            |  26 +-
> >  ovn-sb.xml                  |  50 ++++
> >  tests/ovn-nbctl.at          | 120 ++++++++
> >  tests/ovn-northd.at         | 102 +++++++
> >  tests/ovn.at                | 514 +++++++++++++++++++++++++++++++++
> >  utilities/ovn-nbctl.c       | 357 +++++++++++++++++++++++
> >  utilities/ovn-sbctl.c       |   4 +
> >  18 files changed, 2294 insertions(+), 28 deletions(-)
> >  create mode 100644 controller/mirror.c
> >  create mode 100644 controller/mirror.h
> >
> > diff --git a/NEWS b/NEWS
> > index 6c4573b50..dbffcac0f 100644
> > --- a/NEWS
> > +++ b/NEWS
> > @@ -27,6 +27,7 @@ OVN v22.09.0 - 16 Sep 2022
> >      any of LR's LRP IP, there is no need to create SNAT entry.  Now such
> >      traffic destined to LRP IP is not dropped.
> >    - Bump python version required for building OVN to 3.6.
> > +  - Added Support for Remote Port Mirroring.
> >
> >  OVN v22.06.0 - 03 Jun 2022
> >  --------------------------
> > diff --git a/controller/automake.mk b/controller/automake.mk
> > index c2ab1bbe6..334672b4d 100644
> > --- a/controller/automake.mk
> > +++ b/controller/automake.mk
> > @@ -41,7 +41,9 @@ controller_ovn_controller_SOURCES = \
> >         controller/ovsport.h \
> >         controller/ovsport.c \
> >         controller/vif-plug.h \
> > -       controller/vif-plug.c
> > +       controller/vif-plug.c \
> > +       controller/mirror.h \
> > +       controller/mirror.c
> >
> >  controller_ovn_controller_LDADD = lib/libovn.la $(OVS_LIBDIR)/
> libopenvswitch.la
> >  man_MANS += controller/ovn-controller.8
> > diff --git a/controller/mirror.c b/controller/mirror.c
> > new file mode 100644
> > index 000000000..e410facc0
> > --- /dev/null
> > +++ b/controller/mirror.c
> > @@ -0,0 +1,550 @@
> > +/* Copyright (c) 2022 Red Hat, 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 <unistd.h>
> > +
> > +/* library headers */
> > +#include "lib/sset.h"
> > +#include "lib/util.h"
> > +
> > +/* OVS includes. */
> > +#include "lib/vswitch-idl.h"
> > +#include "openvswitch/vlog.h"
> > +
> > +/* OVN includes. */
> > +#include "binding.h"
> > +#include "lib/ovn-sb-idl.h"
> > +#include "mirror.h"
> > +
> > +VLOG_DEFINE_THIS_MODULE(port_mirror);
> > +
> > +/* Static function declarations */
> > +
> > +static const struct ovsrec_port *
> > +get_port_for_iface(const struct ovsrec_interface *iface,
> > +                   const struct ovsrec_bridge *br_int)
> > +{
> > +    for (size_t i = 0; i < br_int->n_ports; i++) {
> > +        const struct ovsrec_port *p = br_int->ports[i];
> > +        for (size_t j = 0; j < p->n_interfaces; j++) {
> > +            if (!strcmp(iface->name, p->interfaces[j]->name)) {
> > +                return p;
> > +            }
> > +        }
> > +    }
> > +    return NULL;
> > +}
> > +
> > +static void
> > +create_and_set_options(struct ovsrec_interface *iface,
> > +                       const struct sbrec_mirror *sb_mirror)
> > +{
> > +    struct smap options = SMAP_INITIALIZER(&options);
> > +    char *key;
> > +
> > +    key = xasprintf("%ld", (long int) sb_mirror->index);
> > +    smap_add(&options, "remote_ip", sb_mirror->sink);
> > +    smap_add(&options, "key", key);
> > +    if (!strcmp(sb_mirror->type, "erspan")) {
> > +        /* Set the ERSPAN index */
> > +        smap_add(&options, "erspan_idx", key);
> > +        smap_add(&options, "erspan_ver", "1");
> > +    }
> > +    ovsrec_interface_set_options(iface, &options);
> > +
> > +    free(key);
> > +    smap_destroy(&options);
> > +}
> > +
> > +static bool
> > +mirror_create(const struct sbrec_port_binding *pb,
> > +              struct port_mirror_ctx *pm_ctx)
> > +{
> > +    const struct ovsrec_mirror *mirror = NULL;
> > +    struct shash ovs_mirrors = SHASH_INITIALIZER(&ovs_mirrors);
> > +
> > +    if (pb->n_up && !pb->up[0]) {
> > +        return true;
> > +    }
> > +
> > +    if (pb->chassis != pm_ctx->chassis_rec) {
> > +        return true;
> > +    }
> > +
> > +    if (!pm_ctx->ovs_idl_txn) {
> > +        return false;
> > +    }
> > +
> > +    OVSREC_MIRROR_TABLE_FOR_EACH (mirror, pm_ctx->mirror_table) {
> > +        shash_add(&ovs_mirrors, mirror->name, mirror);
> > +    }
> > +
> > +    /* Loop through the mirror rules */
> > +    for (size_t i =0; i < pb->n_mirror_rules; i++) {
> > +        /* check if the mirror already exists in OVS DB */
> > +        mirror = NULL;
> > +        mirror = shash_find_data(&ovs_mirrors,
> pb->mirror_rules[i]->name);
> > +
> > +        if (!mirror) {
> > +
> > +            char *port_name;
> > +            struct ovsrec_interface *iface =
> > +                      ovsrec_interface_insert(pm_ctx->ovs_idl_txn);
> > +            port_name = xasprintf("ovn-%s",
> > +                                   pb->mirror_rules[i]->name);
> > +
> > +            ovsrec_interface_set_name(iface, port_name);
> > +            ovsrec_interface_set_type(iface, pb->mirror_rules[i]->type);
> > +            create_and_set_options(iface, pb->mirror_rules[i]);
> > +
> > +            struct ovsrec_port *port =
> > +                              ovsrec_port_insert(pm_ctx->ovs_idl_txn);
> > +            ovsrec_port_set_name(port, port_name);
> > +            ovsrec_port_set_interfaces(port, &iface, 1);
> > +
> > +            ovsrec_bridge_update_ports_addvalue(pm_ctx->br_int, port);
> > +
> > +            free(port_name);
> > +
> > +            mirror = ovsrec_mirror_insert(pm_ctx->ovs_idl_txn);
> > +            ovsrec_mirror_set_name(mirror, pb->mirror_rules[i]->name);
> > +            ovsrec_mirror_update_output_port_addvalue(mirror, port);
> > +            ovsrec_bridge_update_mirrors_addvalue(pm_ctx->br_int,
> > +                                                             mirror);
> > +        }
> > +
> > +        struct local_binding *lbinding = local_binding_find(
> > +                               pm_ctx->local_bindings,
> pb->logical_port);
> > +        const struct ovsrec_port *p =
> > +                     get_port_for_iface(lbinding->iface,
> pm_ctx->br_int);
> > +        if (p) {
> > +            if (!strcmp(pb->mirror_rules[i]->filter, "from-lport")) {
> > +                ovsrec_mirror_update_select_src_port_addvalue(mirror,
> p);
> > +            } else if (!strcmp(pb->mirror_rules[i]->filter,
> "to-lport")) {
> > +                ovsrec_mirror_update_select_dst_port_addvalue(mirror,
> p);
> > +            } else {
> > +                ovsrec_mirror_update_select_src_port_addvalue(mirror,
> p);
> > +                ovsrec_mirror_update_select_dst_port_addvalue(mirror,
> p);
> > +            }
> > +        }
> > +    }
> > +
> > +    struct shash_node *ovs_mirror_node, *ovs_mirror_next;
> > +    SHASH_FOR_EACH_SAFE (ovs_mirror_node, ovs_mirror_next,
> > +                                              &ovs_mirrors) {
> > +        shash_delete(&ovs_mirrors, ovs_mirror_node);
> > +    }
> > +    shash_destroy(&ovs_mirrors);
> > +
> > +    return true;
> > +}
> > +
> > +enum {
> > +    FILTER_FROM_LPORT,
> > +    FILTER_TO_LPORT,
> > +    FILTER_BOTH
> > +};
> > +
> > +static int
> > +filter_encode(const char *filter)
> > +{
> > +    if (!strcmp(filter, "from-lport")) {
> > +        return FILTER_FROM_LPORT;
> > +    } else if (!strcmp(filter, "to-lport")) {
> > +        return FILTER_TO_LPORT;
> > +    } else if (!strcmp(filter, "both")) {
> > +        return FILTER_BOTH;
> > +    }
> > +
> > +    OVS_NOT_REACHED();
> > +}
> > +
> > +static void
> > +check_and_update_mirror_table(const struct sbrec_mirror *sb_mirror,
> > +                              struct ovsrec_mirror *ovs_mirror)
> > +{
> > +    char *filter;
> > +    if ((ovs_mirror->n_select_dst_port)
> > +            && (ovs_mirror->n_select_src_port)) {
> > +        filter = "both";
> > +    } else if (ovs_mirror->n_select_dst_port) {
> > +        filter = "to-lport";
> > +    } else {
> > +        filter = "from-lport";
> > +    }
> > +
> > +    int ovs_filter = filter_encode(filter);
> > +    int sb_filter  = filter_encode(sb_mirror->filter);
> > +
> > +    if (ovs_filter != sb_filter) {
> > +        if ((sb_filter == FILTER_FROM_LPORT)
> > +            && (ovs_filter == FILTER_BOTH)) {
> > +            for (size_t i = 0; i < ovs_mirror->n_select_dst_port; i++) {
> > +
> ovsrec_mirror_update_select_dst_port_delvalue(ovs_mirror,
> > +
>  ovs_mirror->select_dst_port[i]);
> > +            }
> > +        } else if ((sb_filter == FILTER_TO_LPORT)
> > +                   && (ovs_filter == FILTER_BOTH)) {
> > +            for (size_t i = 0; i < ovs_mirror->n_select_src_port; i++) {
> > +
> ovsrec_mirror_update_select_src_port_delvalue(ovs_mirror,
> > +
>  ovs_mirror->select_src_port[i]);
> > +            }
> > +        } else if ((sb_filter == FILTER_BOTH)
> > +                   && (ovs_filter == FILTER_FROM_LPORT)) {
> > +            for (size_t i = 0; i < ovs_mirror->n_select_src_port; i++) {
> > +
> ovsrec_mirror_update_select_dst_port_addvalue(ovs_mirror,
> > +
>  ovs_mirror->select_src_port[i]);
> > +            }
> > +        } else if ((sb_filter == FILTER_BOTH)
> > +                   && (ovs_filter == FILTER_TO_LPORT)) {
> > +            for (size_t i = 0; i < ovs_mirror->n_select_dst_port; i++) {
> > +
> ovsrec_mirror_update_select_src_port_addvalue(ovs_mirror,
> > +
>  ovs_mirror->select_dst_port[i]);
> > +            }
> > +        } else if ((sb_filter == FILTER_TO_LPORT)
> > +                   && (ovs_filter == FILTER_FROM_LPORT)) {
> > +            for (size_t i = 0; i < ovs_mirror->n_select_src_port; i++) {
> > +
> ovsrec_mirror_update_select_dst_port_addvalue(ovs_mirror,
> > +
>  ovs_mirror->select_src_port[i]);
> > +
> ovsrec_mirror_update_select_src_port_delvalue(ovs_mirror,
> > +
>  ovs_mirror->select_src_port[i]);
> > +            }
> > +        } else if ((sb_filter == FILTER_FROM_LPORT)
> > +                   && (ovs_filter == FILTER_TO_LPORT)) {
> > +            for (size_t i = 0; i < ovs_mirror->n_select_dst_port; i++) {
> > +
> ovsrec_mirror_update_select_src_port_addvalue(ovs_mirror,
> > +
>  ovs_mirror->select_dst_port[i]);
> > +
> ovsrec_mirror_update_select_dst_port_delvalue(ovs_mirror,
> > +
>  ovs_mirror->select_dst_port[i]);
> > +            }
> > +        }
> > +    }
> > +}
> > +
> > +static void
> > +check_and_update_interface_table(const struct sbrec_mirror *sb_mirror,
> > +                                 struct ovsrec_mirror *ovs_mirror)
> > +{
> > +    char *type;
> > +    struct ovsrec_interface *iface =
> > +                          ovs_mirror->output_port->interfaces[0];
> > +    struct smap *opts = &iface->options;
> > +    const char *erspan_ver = smap_get(opts, "erspan_ver");
> > +    if (erspan_ver) {
> > +        type = "erspan";
> > +    } else {
> > +        type = "gre";
> > +    }
> > +    if (strcmp(type, sb_mirror->type)) {
> > +        ovsrec_interface_set_type(iface, sb_mirror->type);
> > +    }
> > +    create_and_set_options(iface, sb_mirror);
> > +}
> > +
> > +static void
> > +mirror_update(const struct sbrec_mirror *sb_mirror,
> > +              struct ovsrec_mirror *ovs_mirror)
> > +{
> > +    check_and_update_interface_table(sb_mirror, ovs_mirror);
> > +    check_and_update_mirror_table(sb_mirror, ovs_mirror);
> > +}
> > +
> > +static bool
> > +mirror_delete(const struct sbrec_port_binding *pb,
> > +              struct port_mirror_ctx *pm_ctx,
> > +              struct shash *pb_mirror_map,
> > +              struct sset *pb_mirrors,
> > +              bool detach_all)
> > +{
> > +
> > +    if (!pm_ctx->ovs_idl_txn) {
> > +        return false;
> > +    }
> > +
> > +    if (detach_all && (shash_is_empty(pb_mirror_map))) {
> > +        for (size_t i = 0; i < pb->n_mirror_rules ; i++) {
> > +
> > +            struct ovsrec_mirror *ovs_mirror = NULL;
> > +            ovs_mirror = shash_find_data(pm_ctx->ovs_mirrors,
> > +                                            pb->mirror_rules[i]->name);
> > +            if (ovs_mirror) {
> > +                ovsrec_bridge_update_ports_delvalue(pm_ctx->br_int,
> > +                                               ovs_mirror->output_port);
> > +                ovsrec_bridge_update_mirrors_delvalue(pm_ctx->br_int,
> > +                                                            ovs_mirror);
> > +                ovsrec_port_delete(ovs_mirror->output_port);
> > +                ovsrec_mirror_delete(ovs_mirror);
> > +            }
> > +        }
> > +    }
> > +
> > +    struct shash_node *mirror_node;
> > +    SHASH_FOR_EACH (mirror_node, pb_mirror_map) {
> > +        struct ovsrec_mirror *ovs_mirror = mirror_node->data;
> > +        if (!sset_find(pb_mirrors, ovs_mirror->name)) {
> > +            /* Find if the mirror has other sources */
> > +            const struct sbrec_port_binding *sb_pb;
> > +            bool is_attached = false;
> > +            SBREC_PORT_BINDING_TABLE_FOR_EACH_TRACKED (sb_pb,
> > +                                       pm_ctx->port_binding_table) {
> > +                for (size_t i = 0; i < sb_pb->n_mirror_rules; i++) {
> > +                    if (!strcmp(sb_pb->mirror_rules[i]->name,
> > +                                                ovs_mirror->name)) {
> > +                        is_attached = true;
> > +                        break;
> > +                    }
> > +                }
> > +                if (is_attached) {
> > +                    break;
> > +                }
> > +            }
> > +            if (is_attached) {
> > +                /* More than 1 source then just
> > +                 * update the mirror table
> > +                 */
> > +                bool done = false;
> > +                for (size_t i = 0; i < ovs_mirror->n_select_dst_port;
> i++) {
> > +                    const struct ovsrec_port *port_rec =
> > +
>  ovs_mirror->select_dst_port[i];
> > +                    for (size_t j = 0; j < port_rec->n_interfaces; j++)
> {
> > +                        const struct ovsrec_interface *iface_rec;
> > +
> > +                        iface_rec = port_rec->interfaces[j];
> > +                        const char *iface_id =
> > +
> smap_get(&iface_rec->external_ids,
> > +
> "iface-id");
> > +                        if (!strcmp(iface_id, pb->logical_port)) {
> > +
> ovsrec_mirror_update_select_dst_port_delvalue(
> > +                                                        ovs_mirror,
> port_rec);
> > +                            done = true;
> > +                            break;
> > +                        }
> > +                    }
> > +                    if (done) {
> > +                        break;
> > +                    }
> > +                }
> > +                done = false;
> > +                for (size_t i = 0; i < ovs_mirror->n_select_src_port;
> i++) {
> > +                    const struct ovsrec_port *port_rec =
> > +
> ovs_mirror->select_src_port[i];
> > +                    for (size_t j = 0; j < port_rec->n_interfaces; j++)
> {
> > +                        const struct ovsrec_interface *iface_rec;
> > +
> > +                        iface_rec = port_rec->interfaces[j];
> > +                        const char *iface_id =
> > +
> smap_get(&iface_rec->external_ids,
> > +
> "iface-id");
> > +                        if (!strcmp(iface_id, pb->logical_port)) {
> > +
> ovsrec_mirror_update_select_src_port_delvalue(
> > +                                                        ovs_mirror,
> port_rec);
> > +                            done = true;
> > +                            break;
> > +                        }
> > +                    }
> > +                    if (done) {
> > +                        break;
> > +                    }
> > +                }
> > +            } else {
> > +                /*
> > +                 * If only 1 source delete the output port
> > +                 * and then delete the mirror completely
> > +                 */
> > +                ovsrec_bridge_update_ports_delvalue(pm_ctx->br_int,
> > +
> ovs_mirror->output_port);
> > +                ovsrec_bridge_update_mirrors_delvalue(pm_ctx->br_int,
> > +                                                            ovs_mirror);
> > +                ovsrec_port_delete(ovs_mirror->output_port);
> > +                ovsrec_mirror_delete(ovs_mirror);
> > +            }
> > +        }
> > +    }
> > +
> > +    return true;
> > +}
> > +
> > +static void
> > +find_port_specific_mirrors (const struct sbrec_port_binding *pb,
> > +                            struct port_mirror_ctx *pm_ctx,
> > +                            struct shash *pb_mirror_map)
> > +{
> > +    const struct ovsrec_mirror *mirror = NULL;
> > +
> > +    OVSREC_MIRROR_TABLE_FOR_EACH (mirror, pm_ctx->mirror_table) {
> > +        for (size_t i = 0; i < mirror->n_select_dst_port; i++) {
> > +            const struct ovsrec_port *port_rec =
> mirror->select_dst_port[i];
> > +            for (size_t j = 0; j < port_rec->n_interfaces; j++) {
> > +                const struct ovsrec_interface *iface_rec;
> > +                iface_rec = port_rec->interfaces[j];
> > +                const char *logical_port =
> > +                    smap_get(&iface_rec->external_ids, "iface-id");
> > +                if (!strcmp(logical_port, pb->logical_port)) {
> > +                    shash_add_once(pb_mirror_map, mirror->name, mirror);
> > +                }
> > +            }
> > +        }
> > +        for (size_t i = 0; i < mirror->n_select_src_port; i++) {
> > +            const struct ovsrec_port *port_rec =
> mirror->select_src_port[i];
> > +            for (size_t j = 0; j < port_rec->n_interfaces; j++) {
> > +                const struct ovsrec_interface *iface_rec;
> > +                iface_rec = port_rec->interfaces[j];
> > +                const char *logical_port =
> > +                    smap_get(&iface_rec->external_ids, "iface-id");
> > +                if (!strcmp(logical_port, pb->logical_port)) {
> > +                    shash_add_once(pb_mirror_map, mirror->name, mirror);
> > +                }
> > +            }
> > +        }
> > +    }
> > +}
> > +
> > +void
> > +mirror_register_ovs_idl(struct ovsdb_idl *ovs_idl)
> > +{
> > +    ovsdb_idl_add_column(ovs_idl, &ovsrec_bridge_col_mirrors);
> > +
> > +    ovsdb_idl_add_table(ovs_idl, &ovsrec_table_mirror);
> > +    ovsdb_idl_add_column(ovs_idl, &ovsrec_mirror_col_name);
> > +    ovsdb_idl_add_column(ovs_idl, &ovsrec_mirror_col_output_port);
> > +    ovsdb_idl_add_column(ovs_idl, &ovsrec_mirror_col_select_dst_port);
> > +    ovsdb_idl_add_column(ovs_idl, &ovsrec_mirror_col_select_src_port);
> > +}
> > +
> > +
> > +void
> > +ovn_port_mirror_init(struct shash *ovs_mirrors)
> > +{
> > +    shash_init(ovs_mirrors);
> > +}
> > +
> > +void
> > +ovn_port_mirror_run(struct port_mirror_ctx *pm_ctx)
> > +{
> > +    const struct sbrec_port_binding *pb;
> > +    SBREC_PORT_BINDING_TABLE_FOR_EACH (pb,
> > +                                       pm_ctx->port_binding_table) {
> > +        ovn_port_mirror_handle_lport(pb, false, pm_ctx);
> > +    }
> > +}
> > +
> > +bool
> > +ovn_port_mirror_handle_lport(const struct sbrec_port_binding *pb, bool
> removed,
> > +                             struct port_mirror_ctx *pm_ctx)
> > +{
> > +    bool ret = true;
> > +    struct local_binding *lbinding = local_binding_find(
> > +                               pm_ctx->local_bindings,
> pb->logical_port);
> > +
> > +    if (strcmp(pb->type, "") && (!lbinding)) {
> > +        return ret;
> > +    }
> > +
> > +    struct shash port_ovs_mirrors =
> SHASH_INITIALIZER(&port_ovs_mirrors);
> > +    struct sset pb_mirrors = SSET_INITIALIZER(&pb_mirrors);
> > +
> > +    /* Need to find if mirror needs update */
> > +    find_port_specific_mirrors(pb, pm_ctx, &port_ovs_mirrors);
> > +    if (removed) {
> > +        /* Port Binding is removed.
> > +         * So, we detach it from all the mirrors associated to it.
> > +         * If when detaching there are no other sources to a mirror,
> > +         * then delete mirror and remove the associated output port.
> > +         * Also pass the pb_mirrors set empty.
> > +         */
> > +        ret = mirror_delete(pb, pm_ctx, &port_ovs_mirrors, &pb_mirrors,
> true);
> > +    } else {
> > +        /* Check and call mirror_create */
> > +        for (size_t i = 0; i < pb->n_mirror_rules; i++) {
> > +            if (!shash_find(&port_ovs_mirrors,
> > +                            pb->mirror_rules[i]->name)) {
> > +                    ret = mirror_create(pb, pm_ctx);
> > +                break;
> > +            }
> > +        }
> > +
> > +        /* Check and call mirror_delete */
> > +        for (size_t i = 0; i < pb->n_mirror_rules ; i++) {
> > +            sset_add(&pb_mirrors, pb->mirror_rules[i]->name);
> > +        }
> > +
> > +        struct shash_node *mirror_node;
> > +        SHASH_FOR_EACH (mirror_node, &port_ovs_mirrors) {
> > +            struct ovsrec_mirror *ovs_mirror = mirror_node->data;
> > +            if (!sset_find(&pb_mirrors, ovs_mirror->name)) {
> > +                if (ret) {
> > +                    ret = mirror_delete(pb, pm_ctx,
> > +                                        &port_ovs_mirrors,
> > +                                        &pb_mirrors, false);
> > +                }
> > +                break;
> > +            }
> > +        }
> > +        const char *used_node, *used_next;
> > +        SSET_FOR_EACH_SAFE (used_node, used_next, &pb_mirrors) {
> > +            sset_delete(&pb_mirrors, SSET_NODE_FROM_NAME(used_node));
> > +        }
> > +    }
> > +
> > +    sset_destroy(&pb_mirrors);
> > +
> > +    struct shash_node *ovs_mirror_node, *ovs_mirror_next;
> > +    SHASH_FOR_EACH_SAFE (ovs_mirror_node, ovs_mirror_next,
> > +                                              &port_ovs_mirrors) {
> > +        shash_delete(&port_ovs_mirrors, ovs_mirror_node);
> > +    }
> > +    shash_destroy(&port_ovs_mirrors);
> > +
> > +    return ret;
> > +}
> > +
> > +bool
> > +ovn_port_mirror_handle_update(struct port_mirror_ctx *pm_ctx)
> > +{
> > +    const struct sbrec_mirror *mirror = NULL;
> > +    struct ovsrec_mirror *ovs_mirror = NULL;
> > +
> > +    SBREC_MIRROR_TABLE_FOR_EACH_TRACKED (mirror,
> pm_ctx->sb_mirror_table) {
> > +    /* For each tracked mirror entry check if OVS entry is there */
> > +        ovs_mirror = shash_find_data(pm_ctx->ovs_mirrors, mirror->name);
> > +        if (ovs_mirror) {
> > +            if (sbrec_mirror_is_deleted(mirror)) {
> > +                /* Need to delete the mirror in OVS */
> > +                ovsrec_bridge_update_ports_delvalue(pm_ctx->br_int,
> > +
> ovs_mirror->output_port);
> > +                ovsrec_bridge_update_mirrors_delvalue(pm_ctx->br_int,
> > +                                                      ovs_mirror);
> > +                ovsrec_port_delete(ovs_mirror->output_port);
> > +                ovsrec_mirror_delete(ovs_mirror);
> > +            } else {
> > +                mirror_update(mirror, ovs_mirror);
> > +            }
> > +        }
> > +    }
> > +
> > +    return true;
> > +}
> > +
> > +void
> > +ovn_port_mirror_destroy(struct shash *ovs_mirrors)
> > +{
> > +    struct shash_node *ovs_mirror_node, *ovs_mirror_next;
> > +    SHASH_FOR_EACH_SAFE (ovs_mirror_node, ovs_mirror_next,
> > +                                              ovs_mirrors) {
> > +        shash_delete(ovs_mirrors, ovs_mirror_node);
> > +    }
> > +    shash_destroy(ovs_mirrors);
> > +}
> > diff --git a/controller/mirror.h b/controller/mirror.h
> > new file mode 100644
> > index 000000000..85b964f55
> > --- /dev/null
> > +++ b/controller/mirror.h
> > @@ -0,0 +1,53 @@
> > +/* Copyright (c) 2022 Red Hat, 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.
> > + */
> > +
> > +#ifndef OVN_MIRROR_H
> > +#define OVN_MIRROR_H 1
> > +
> > +struct ovsdb_idl_txn;
> > +struct ovsrec_port_table;
> > +struct ovsrec_bridge;
> > +struct ovsrec_bridge_table;
> > +struct ovsrec_open_vswitch_table;
> > +struct sbrec_chassis;
> > +struct ovsrec_interface_table;
> > +struct ovsrec_mirror_table;
> > +struct sbrec_mirror_table;
> > +struct sbrec_port_binding_table;
> > +
> > +struct port_mirror_ctx {
> > +    struct shash *ovs_mirrors;
> > +    struct ovsdb_idl_txn *ovs_idl_txn;
> > +    const struct ovsrec_port_table *port_table;
> > +    const struct ovsrec_bridge *br_int;
> > +    const struct sbrec_chassis *chassis_rec;
> > +    const struct ovsrec_bridge_table *bridge_table;
> > +    const struct ovsrec_open_vswitch_table *ovs_table;
> > +    const struct ovsrec_interface_table *iface_table;
> > +    const struct ovsrec_mirror_table *mirror_table;
> > +    const struct sbrec_mirror_table *sb_mirror_table;
> > +    const struct sbrec_port_binding_table *port_binding_table;
> > +    struct shash *local_bindings;
> > +};
> > +
> > +void mirror_register_ovs_idl(struct ovsdb_idl *);
> > +void ovn_port_mirror_init(struct shash *);
> > +void ovn_port_mirror_destroy(struct shash *);
> > +void ovn_port_mirror_run(struct port_mirror_ctx *pm_ctx);
> > +bool ovn_port_mirror_handle_lport(const struct sbrec_port_binding *pb,
> > +                                  bool removed,
> > +                                  struct port_mirror_ctx *pm_ctx);
> > +bool ovn_port_mirror_handle_update(struct port_mirror_ctx *pm_ctx);
> > +#endif
> > diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
> > index 0752a71ad..1a03837f5 100644
> > --- a/controller/ovn-controller.c
> > +++ b/controller/ovn-controller.c
> > @@ -78,6 +78,7 @@
> >  #include "lib/inc-proc-eng.h"
> >  #include "lib/ovn-l7.h"
> >  #include "hmapx.h"
> > +#include "mirror.h"
> >
> >  VLOG_DEFINE_THIS_MODULE(main);
> >
> > @@ -994,6 +995,7 @@ ctrl_register_ovs_idl(struct ovsdb_idl *ovs_idl)
> >      ovsdb_idl_track_add_column(ovs_idl, &ovsrec_port_col_name);
> >      ovsdb_idl_track_add_column(ovs_idl, &ovsrec_port_col_interfaces);
> >      ovsdb_idl_track_add_column(ovs_idl, &ovsrec_port_col_external_ids);
> > +    mirror_register_ovs_idl(ovs_idl);
> >  }
> >
> >  #define SB_NODES \
> > @@ -1014,6 +1016,7 @@ ctrl_register_ovs_idl(struct ovsdb_idl *ovs_idl)
> >      SB_NODE(load_balancer, "load_balancer") \
> >      SB_NODE(fdb, "fdb") \
> >      SB_NODE(meter, "meter") \
> > +    SB_NODE(mirror, "mirror") \
> >      SB_NODE(static_mac_binding, "static_mac_binding")
> >
> >  enum sb_engine_node {
> > @@ -1031,7 +1034,8 @@ enum sb_engine_node {
> >      OVS_NODE(bridge, "bridge") \
> >      OVS_NODE(port, "port") \
> >      OVS_NODE(interface, "interface") \
> > -    OVS_NODE(qos, "qos")
> > +    OVS_NODE(qos, "qos") \
> > +    OVS_NODE(mirror, "mirror")
> >
> >  enum ovs_engine_node {
> >  #define OVS_NODE(NAME, NAME_STR) OVS_##NAME,
> > @@ -2405,6 +2409,202 @@ load_balancers_by_dp_cleanup(struct hmap *lbs)
> >      free(lbs);
> >  }
> >
> > +/* Mirror Engine */
> > +struct ed_type_port_mirror {
> > +    struct shash ovs_mirrors;
> > +};
> > +
> > +static void *
> > +en_port_mirror_init(struct engine_node *node OVS_UNUSED,
> > +                    struct engine_arg *arg OVS_UNUSED)
> > +{
> > +    struct ed_type_port_mirror *port_mirror = xzalloc(sizeof
> *port_mirror);
> > +    ovn_port_mirror_init(&port_mirror->ovs_mirrors);
> > +    return port_mirror;
> > +}
> > +
> > +static void
> > +en_port_mirror_cleanup(void *data)
> > +{
> > +    struct ed_type_port_mirror *port_mirror = data;
> > +    ovn_port_mirror_destroy(&port_mirror->ovs_mirrors);
> > +}
> > +
> > +static void
> > +init_port_mirror_ctx(struct engine_node *node,
> > +                 struct ed_type_runtime_data *rt_data,
> > +                 struct ed_type_port_mirror *port_mirror_data,
> > +                 struct port_mirror_ctx *pm_ctx)
> > +{
> > +    struct ovsrec_open_vswitch_table *ovs_table =
> > +        (struct ovsrec_open_vswitch_table *) EN_OVSDB_GET(
> > +            engine_get_input("OVS_open_vswitch", node));
> > +    struct ovsrec_bridge_table *bridge_table =
> > +        (struct ovsrec_bridge_table *) EN_OVSDB_GET(
> > +            engine_get_input("OVS_bridge", node));
> > +    const char *chassis_id = get_ovs_chassis_id(ovs_table);
> > +    const struct ovsrec_bridge *br_int = get_br_int(bridge_table,
> ovs_table);
> > +
> > +    ovs_assert(br_int && chassis_id);
> > +    const struct sbrec_chassis *chassis = NULL;
> > +    struct ovsdb_idl_index *sbrec_chassis_by_name =
> > +        engine_ovsdb_node_get_index(
> > +                engine_get_input("SB_chassis", node),
> > +                "name");
> > +
> > +    if (chassis_id) {
> > +        chassis = chassis_lookup_by_name(sbrec_chassis_by_name,
> chassis_id);
> > +    }
> > +    ovs_assert(chassis);
> > +
> > +    struct ovsrec_port_table *port_table =
> > +        (struct ovsrec_port_table *) EN_OVSDB_GET(
> > +            engine_get_input("OVS_port", node));
> > +
> > +    struct ed_type_ovs_interface_shadow *iface_shadow =
> > +        engine_get_input_data("ovs_interface_shadow", node);
> > +
> > +    struct ovsrec_mirror_table *mirror_table =
> > +        (struct ovsrec_mirror_table *) EN_OVSDB_GET(
> > +            engine_get_input("OVS_mirror", node));
> > +
> > +    struct sbrec_port_binding_table *pb_table =
> > +        (struct sbrec_port_binding_table *) EN_OVSDB_GET(
> > +            engine_get_input("SB_port_binding", node));
> > +
> > +    struct sbrec_mirror_table *sb_mirror_table =
> > +        (struct sbrec_mirror_table *) EN_OVSDB_GET(
> > +            engine_get_input("SB_mirror", node));
> > +
> > +    struct shash_node *ovs_mirror_node, *ovs_mirror_next;
> > +    SHASH_FOR_EACH_SAFE (ovs_mirror_node, ovs_mirror_next,
> > +                           &port_mirror_data->ovs_mirrors) {
> > +        shash_delete(&port_mirror_data->ovs_mirrors, ovs_mirror_node);
> > +    }
> > +
> > +    const struct ovsrec_mirror *ovsmirror = NULL;
> > +    OVSREC_MIRROR_TABLE_FOR_EACH (ovsmirror, mirror_table) {
> > +       shash_add(&port_mirror_data->ovs_mirrors, ovsmirror->name,
> ovsmirror);
> > +    }
> > +
> > +    pm_ctx->ovs_idl_txn = engine_get_context()->ovs_idl_txn;
> > +    pm_ctx->port_table = port_table;
> > +    pm_ctx->iface_table = iface_shadow->iface_table;
> > +    pm_ctx->mirror_table = mirror_table;
> > +    pm_ctx->port_binding_table = pb_table;
> > +    pm_ctx->sb_mirror_table = sb_mirror_table;
> > +    pm_ctx->br_int = br_int;
> > +    pm_ctx->chassis_rec = chassis;
> > +    pm_ctx->bridge_table = bridge_table;
> > +    pm_ctx->ovs_table = ovs_table;
> > +    pm_ctx->ovs_mirrors = &port_mirror_data->ovs_mirrors;
> > +    pm_ctx->local_bindings = &rt_data->lbinding_data.bindings;
> > +}
> > +
> > +static void
> > +en_port_mirror_run(struct engine_node *node, void *data)
> > +{
> > +    struct port_mirror_ctx pm_ctx;
> > +    struct ed_type_port_mirror *port_mirror_data = data;
> > +    struct ed_type_runtime_data *rt_data =
> > +        engine_get_input_data("runtime_data", node);
> > +
> > +    init_port_mirror_ctx(node, rt_data, port_mirror_data, &pm_ctx);
> > +
> > +    ovn_port_mirror_run(&pm_ctx);
> > +    engine_set_node_state(node, EN_UPDATED);
> > +}
> > +
> > +static bool
> > +port_mirror_runtime_data_handler(struct engine_node *node, void *data)
> > +{
> > +    struct ed_type_runtime_data *rt_data =
> > +        engine_get_input_data("runtime_data", node);
> > +
> > +    /* There is no tracked data. Fall back to full recompute of
> port_mirror */
> > +    if (!rt_data->tracked) {
> > +        return false;
> > +    }
> > +
> > +    struct hmap *tracked_dp_bindings = &rt_data->tracked_dp_bindings;
> > +    if (hmap_is_empty(tracked_dp_bindings)) {
> > +        return true;
> > +    }
> > +
> > +    struct port_mirror_ctx pm_ctx;
> > +    struct ed_type_port_mirror *port_mirror_data = data;
> > +    init_port_mirror_ctx(node, rt_data, port_mirror_data, &pm_ctx);
> > +
> > +    struct tracked_datapath *tdp;
> > +    HMAP_FOR_EACH (tdp, node, tracked_dp_bindings) {
> > +        if (tdp->tracked_type != TRACKED_RESOURCE_UPDATED) {
> > +            /* Fall back to full recompute when a local datapath
> > +             * is added or deleted. */
> > +            return false;
> > +        }
> > +
> > +        struct shash_node *shash_node;
> > +        SHASH_FOR_EACH (shash_node, &tdp->lports) {
> > +            struct tracked_lport *lport = shash_node->data;
> > +            bool removed =
> > +                lport->tracked_type == TRACKED_RESOURCE_REMOVED ? true:
> false;
> > +            if (!ovn_port_mirror_handle_lport(lport->pb, removed,
> &pm_ctx)) {
> > +                return false;
> > +            }
> > +        }
> > +    }
> > +
> > +    engine_set_node_state(node, EN_UPDATED);
> > +    return true;
> > +}
> > +
> > +static bool
> > +port_mirror_port_binding_handler(struct engine_node *node, void *data)
> > +{
> > +    struct port_mirror_ctx pm_ctx;
> > +    struct ed_type_port_mirror *port_mirror_data = data;
> > +    struct ed_type_runtime_data *rt_data =
> > +        engine_get_input_data("runtime_data", node);
> > +
> > +    init_port_mirror_ctx(node, rt_data, port_mirror_data, &pm_ctx);
> > +
> > +    /* handle port binding updates (i.e. when the mirror column
> > +     * of port_binding is updated)
> > +     */
> > +    const struct sbrec_port_binding *pb;
> > +    SBREC_PORT_BINDING_TABLE_FOR_EACH_TRACKED (pb,
> > +
>  pm_ctx.port_binding_table) {
> > +        bool removed = sbrec_port_binding_is_deleted(pb);
> > +        if (!ovn_port_mirror_handle_lport(pb, removed, &pm_ctx)) {
> > +            return false;
> > +        }
> > +    }
> > +
> > +    engine_set_node_state(node, EN_UPDATED);
> > +    return true;
> > +
> > +}
> > +
> > +static bool
> > +port_mirror_sb_mirror_handler(struct engine_node *node, void *data)
> > +{
> > +    struct port_mirror_ctx pm_ctx;
> > +    struct ed_type_port_mirror *port_mirror_data = data;
> > +    struct ed_type_runtime_data *rt_data =
> > +        engine_get_input_data("runtime_data", node);
> > +
> > +    init_port_mirror_ctx(node, rt_data, port_mirror_data, &pm_ctx);
> > +
> > +    /* handle sb mirror updates */
> > +    if (!ovn_port_mirror_handle_update(&pm_ctx)) {
> > +        return false;
> > +    }
> > +
> > +    engine_set_node_state(node, EN_UPDATED);
> > +    return true;
> > +
> > +}
> > +
> >  /* Engine node which is used to handle the Non VIF data like
> >   *   - OVS patch ports
> >   *   - Tunnel ports and the related chassis information.
> > @@ -3766,6 +3966,7 @@ main(int argc, char *argv[])
> >      ENGINE_NODE_WITH_CLEAR_TRACK_DATA(port_groups, "port_groups");
> >      ENGINE_NODE(northd_options, "northd_options");
> >      ENGINE_NODE(dhcp_options, "dhcp_options");
> > +    ENGINE_NODE(port_mirror, "port_mirror");
> >
> >  #define SB_NODE(NAME, NAME_STR) ENGINE_NODE_SB(NAME, NAME_STR);
> >      SB_NODES
> > @@ -3926,6 +4127,22 @@ main(int argc, char *argv[])
> >      engine_add_input(&en_flow_output, &en_pflow_output,
> >                       flow_output_pflow_output_handler);
> >
> > +    engine_add_input(&en_port_mirror, &en_ovs_open_vswitch, NULL);
> > +    engine_add_input(&en_port_mirror, &en_ovs_bridge, NULL);
> > +    engine_add_input(&en_port_mirror, &en_ovs_mirror, NULL);
> > +    engine_add_input(&en_port_mirror, &en_sb_chassis, NULL);
> > +    engine_add_input(&en_port_mirror, &en_ovs_port,
> engine_noop_handler);
> > +    engine_add_input(&en_port_mirror, &en_ovs_interface_shadow,
> > +                     engine_noop_handler);
> > +    engine_add_input(&en_flow_output, &en_port_mirror,
> > +                     engine_noop_handler);
> > +    engine_add_input(&en_port_mirror, &en_runtime_data,
> > +                     port_mirror_runtime_data_handler);
> > +    engine_add_input(&en_port_mirror, &en_sb_mirror,
> > +                     port_mirror_sb_mirror_handler);
> > +    engine_add_input(&en_port_mirror, &en_sb_port_binding,
> > +                     port_mirror_port_binding_handler);
> > +
> >      struct engine_arg engine_arg = {
> >          .sb_idl = ovnsb_idl_loop.idl,
> >          .ovs_idl = ovs_idl_loop.idl,
> > @@ -4195,34 +4412,36 @@ main(int argc, char *argv[])
> >
> >                      stopwatch_start(CONTROLLER_LOOP_STOPWATCH_NAME,
> >                                      time_msec());
> > -                    if (ovnsb_idl_txn) {
> > -                        if (ofctrl_has_backlog()) {
> > -                            /* When there are in-flight messages
> pending to
> > -                             * ovs-vswitchd, we should hold on
> recomputing so
> > -                             * that the previous flow installations
> won't be
> > -                             * delayed.  However, we still want to try
> if
> > -                             * recompute is not needed and we can
> quickly
> > -                             * incrementally process the new changes,
> to avoid
> > -                             * unnecessarily forced recomputes later
> on.  This
> > -                             * is because the OVSDB change tracker
> cannot
> > -                             * preserve tracked changes across
> iterations.  If
> > -                             * change tracking is improved, we can
> simply skip
> > -                             * this round of engine_run and continue
> processing
> > -                             * acculated changes incrementally later
> when
> > -                             * ofctrl_has_backlog() returns false. */
> > -                            engine_run(false);
> > -                        } else {
> > -                            engine_run(true);
> > -                        }
> > -                    } else {
> > -                        /* Even if there's no SB DB transaction
> available,
> > +
> > +                    bool allow_engine_recompute = true;
> > +
> > +                    if (!ovnsb_idl_txn || !ovs_idl_txn ||
> > +
>  ofctrl_has_backlog()) {
> > +                        /* When there are in-flight messages pending to
> > +                         * ovs-vswitchd, we should hold on recomputing
> so
> > +                         * that the previous flow installations won't be
> > +                         * delayed.  However, we still want to try if
> > +                         * recompute is not needed and we can quickly
> > +                         * incrementally process the new changes, to
> avoid
> > +                         * unnecessarily forced recomputes later on.
> This
> > +                         * is because the OVSDB change tracker cannot
> > +                         * preserve tracked changes across iterations.
> If
> > +                         * change tracking is improved, we can simply
> skip
> > +                         * this round of engine_run and continue
> processing
> > +                         * acculated changes incrementally later when
> > +                         * ofctrl_has_backlog() returns false. */
> > +
> > +                        /* Even if there's no SB/OVS DB transaction
> available,
> >                           * try to run the engine so that we can handle
> any
> >                           * incremental changes that don't require a
> recompute.
> >                           * If a recompute is required, the engine will
> abort,
> >                           * triggerring a full run in the next iteration.
> >                           */
> > -                        engine_run(false);
> > +                        allow_engine_recompute = false;
> >                      }
> > +
> > +                    engine_run(allow_engine_recompute);
> > +
> >                      stopwatch_stop(CONTROLLER_LOOP_STOPWATCH_NAME,
> >                                     time_msec());
> >                      if (engine_has_updated()) {
> > diff --git a/northd/en-northd.c b/northd/en-northd.c
> > index 93891b0b7..66ecc6573 100644
> > --- a/northd/en-northd.c
> > +++ b/northd/en-northd.c
> > @@ -78,6 +78,8 @@ void en_northd_run(struct engine_node *node, void
> *data)
> >          EN_OVSDB_GET(engine_get_input("NB_acl", node));
> >      input_data.nbrec_static_mac_binding_table =
> >          EN_OVSDB_GET(engine_get_input("NB_static_mac_binding", node));
> > +    input_data.nbrec_mirror_table =
> > +        EN_OVSDB_GET(engine_get_input("NB_mirror", node));
> >
> >      input_data.sbrec_sb_global_table =
> >          EN_OVSDB_GET(engine_get_input("SB_sb_global", node));
> > @@ -109,6 +111,8 @@ void en_northd_run(struct engine_node *node, void
> *data)
> >          EN_OVSDB_GET(engine_get_input("SB_chassis_private", node));
> >      input_data.sbrec_static_mac_binding_table =
> >          EN_OVSDB_GET(engine_get_input("SB_static_mac_binding", node));
> > +    input_data.sbrec_mirror_table =
> > +        EN_OVSDB_GET(engine_get_input("SB_mirror", node));
> >
> >      northd_run(&input_data, data,
> >                 eng_ctx->ovnnb_idl_txn,
> > diff --git a/northd/inc-proc-northd.c b/northd/inc-proc-northd.c
> > index 73f230b2c..7b7b250f3 100644
> > --- a/northd/inc-proc-northd.c
> > +++ b/northd/inc-proc-northd.c
> > @@ -52,6 +52,7 @@ VLOG_DEFINE_THIS_MODULE(inc_proc_northd);
> >      NB_NODE(acl, "acl") \
> >      NB_NODE(logical_router, "logical_router") \
> >      NB_NODE(qos, "qos") \
> > +    NB_NODE(mirror, "mirror") \
> >      NB_NODE(meter, "meter") \
> >      NB_NODE(meter_band, "meter_band") \
> >      NB_NODE(logical_router_port, "logical_router_port") \
> > @@ -94,6 +95,7 @@ VLOG_DEFINE_THIS_MODULE(inc_proc_northd);
> >      SB_NODE(logical_flow, "logical_flow") \
> >      SB_NODE(logical_dp_group, "logical_DP_group") \
> >      SB_NODE(multicast_group, "multicast_group") \
> > +    SB_NODE(mirror, "mirror") \
> >      SB_NODE(meter, "meter") \
> >      SB_NODE(meter_band, "meter_band") \
> >      SB_NODE(datapath_binding, "datapath_binding") \
> > @@ -176,6 +178,7 @@ void inc_proc_northd_init(struct ovsdb_idl_loop *nb,
> >      engine_add_input(&en_northd, &en_nb_acl, NULL);
> >      engine_add_input(&en_northd, &en_nb_logical_router, NULL);
> >      engine_add_input(&en_northd, &en_nb_qos, NULL);
> > +    engine_add_input(&en_northd, &en_nb_mirror, NULL);
> >      engine_add_input(&en_northd, &en_nb_meter, NULL);
> >      engine_add_input(&en_northd, &en_nb_meter_band, NULL);
> >      engine_add_input(&en_northd, &en_nb_logical_router_port, NULL);
> > @@ -197,6 +200,7 @@ void inc_proc_northd_init(struct ovsdb_idl_loop *nb,
> >      engine_add_input(&en_northd, &en_sb_encap, NULL);
> >      engine_add_input(&en_northd, &en_sb_port_group, NULL);
> >      engine_add_input(&en_northd, &en_sb_logical_dp_group, NULL);
> > +    engine_add_input(&en_northd, &en_sb_mirror, NULL);
> >      engine_add_input(&en_northd, &en_sb_meter, NULL);
> >      engine_add_input(&en_northd, &en_sb_meter_band, NULL);
> >      engine_add_input(&en_northd, &en_sb_datapath_binding, NULL);
> > diff --git a/northd/northd.c b/northd/northd.c
> > index 040f46e1a..16739983c 100644
> > --- a/northd/northd.c
> > +++ b/northd/northd.c
> > @@ -3239,6 +3239,89 @@ ovn_port_update_sbrec_chassis(
> >      free(requested_chassis_sb);
> >  }
> >
> > +static void
> > +do_sb_mirror_addition(struct northd_input *input_data,
> > +                      const struct ovn_port *op)
> > +{
> > +    for (size_t i = 0; i < op->nbsp->n_mirror_rules; i++) {
> > +        const struct sbrec_mirror *sb_mirror;
> > +        SBREC_MIRROR_TABLE_FOR_EACH (sb_mirror,
> > +                                     input_data->sbrec_mirror_table) {
> > +            if (!strcmp(sb_mirror->name,
> > +                        op->nbsp->mirror_rules[i]->name)) {
> > +                /* Add the value to SB */
> > +                sbrec_port_binding_update_mirror_rules_addvalue(op->sb,
> > +
> sb_mirror);
> > +            }
> > +        }
> > +    }
> > +}
> > +
> > +static void
> > +sbrec_port_binding_update_mirror_rules(struct northd_input *input_data,
> > +                                       const struct ovn_port *op)
> > +{
> > +    size_t i = 0;
> > +    if (op->sb->n_mirror_rules > op->nbsp->n_mirror_rules) {
> > +        /* Needs deletion in SB */
> > +        struct shash nb_mirror_rules =
> SHASH_INITIALIZER(&nb_mirror_rules);
> > +        for (i = 0; i < op->nbsp->n_mirror_rules; i++) {
> > +            shash_add(&nb_mirror_rules,
> > +                                 op->nbsp->mirror_rules[i]->name,
> > +                                 op->nbsp->mirror_rules[i]);
> > +        }
> > +
> > +        for (i = 0; i < op->sb->n_mirror_rules; i++) {
> > +            if (!shash_find(&nb_mirror_rules,
> > +                           op->sb->mirror_rules[i]->name)) {
> > +
> sbrec_port_binding_update_mirror_rules_delvalue(op->sb,
> > +
>  op->sb->mirror_rules[i]);
> > +            }
> > +        }
> > +
> > +        struct shash_node *node, *next;
> > +        SHASH_FOR_EACH_SAFE (node, next, &nb_mirror_rules) {
> > +            shash_delete(&nb_mirror_rules, node);
> > +        }
> > +        shash_destroy(&nb_mirror_rules);
> > +
> > +    } else if (op->sb->n_mirror_rules < op->nbsp->n_mirror_rules) {
> > +        /* Needs addition in SB */
> > +        do_sb_mirror_addition(input_data, op);
> > +    } else if (op->sb->n_mirror_rules == op->nbsp->n_mirror_rules) {
> > +        /*
> > +         * Check if its the same mirrors on both SB and NB DBs
> > +         * If not update accordingly.
> > +         */
> > +        bool needs_sb_addition = false;
> > +        struct shash nb_mirror_rules =
> SHASH_INITIALIZER(&nb_mirror_rules);
> > +        for (i = 0; i < op->nbsp->n_mirror_rules; i++) {
> > +            shash_add(&nb_mirror_rules,
> > +                                 op->nbsp->mirror_rules[i]->name,
> > +                                 op->nbsp->mirror_rules[i]);
> > +        }
> > +
> > +        for (i = 0; i < op->sb->n_mirror_rules; i++) {
> > +            if (!shash_find(&nb_mirror_rules,
> > +                           op->sb->mirror_rules[i]->name)) {
> > +
> sbrec_port_binding_update_mirror_rules_delvalue(op->sb,
> > +
>  op->sb->mirror_rules[i]);
> > +                    needs_sb_addition = true;
> > +            }
> > +        }
> > +
> > +        struct shash_node *node, *next;
> > +        SHASH_FOR_EACH_SAFE (node, next, &nb_mirror_rules) {
> > +            shash_delete(&nb_mirror_rules, node);
> > +        }
> > +        shash_destroy(&nb_mirror_rules);
> > +
> > +        if (needs_sb_addition) {
> > +            do_sb_mirror_addition(input_data, op);
> > +        }
> > +    }
> > +}
> > +
> >  static void
> >  ovn_port_update_sbrec(struct northd_input *input_data,
> >                        struct ovsdb_idl_txn *ovnsb_txn,
> > @@ -3598,6 +3681,15 @@ ovn_port_update_sbrec(struct northd_input
> *input_data,
> >          }
> >          sbrec_port_binding_set_external_ids(op->sb, &ids);
> >          smap_destroy(&ids);
> > +
> > +        if (!op->nbsp->n_mirror_rules) {
> > +            /* Nothing is set. Clear mirror_rules from pb. */
> > +            sbrec_port_binding_set_mirror_rules(op->sb, NULL, 0);
> > +        } else {
> > +            /* Check if SB DB update needed */
> > +            sbrec_port_binding_update_mirror_rules(input_data, op);
> > +        }
> > +
> >      }
> >      if (op->tunnel_key != op->sb->tunnel_key) {
> >          sbrec_port_binding_set_tunnel_key(op->sb, op->tunnel_key);
> > @@ -15161,6 +15253,85 @@ sync_meters(struct northd_input *input_data,
> >      shash_destroy(&sb_meters);
> >  }
> >
> > +static bool
> > +mirror_needs_update(const struct nbrec_mirror *nb_mirror,
> > +                  const struct sbrec_mirror *sb_mirror)
> > +{
> > +
> > +    if (nb_mirror->index != sb_mirror->index) {
> > +        return true;
> > +    } else if (strcmp(nb_mirror->sink, sb_mirror->sink)) {
> > +        return true;
> > +    } else if (strcmp(nb_mirror->type, sb_mirror->type)) {
> > +        return true;
> > +    } else if (strcmp(nb_mirror->filter, sb_mirror->filter)) {
> > +        return true;
> > +    }
> > +
> > +    return false;
> > +}
> > +
> > +static void
> > +sync_mirrors_iterate_nb_mirror(struct ovsdb_idl_txn *ovnsb_txn,
> > +                             const char *mirror_name,
> > +                             const struct nbrec_mirror *nb_mirror,
> > +                             struct shash *sb_mirrors,
> > +                             struct sset *used_sb_mirrors)
> > +{
> > +    const struct sbrec_mirror *sb_mirror;
> > +    bool new_sb_mirror = false;
> > +
> > +    sb_mirror = shash_find_data(sb_mirrors, mirror_name);
> > +    if (!sb_mirror) {
> > +        sb_mirror = sbrec_mirror_insert(ovnsb_txn);
> > +        sbrec_mirror_set_name(sb_mirror, mirror_name);
> > +        shash_add(sb_mirrors, sb_mirror->name, sb_mirror);
> > +        new_sb_mirror = true;
> > +    }
> > +    sset_add(used_sb_mirrors, mirror_name);
> > +
> > +    if ((new_sb_mirror) || mirror_needs_update(nb_mirror, sb_mirror)) {
> > +        sbrec_mirror_set_filter(sb_mirror,nb_mirror->filter);
> > +        sbrec_mirror_set_index(sb_mirror, nb_mirror->index);
> > +        sbrec_mirror_set_sink(sb_mirror, nb_mirror->sink);
> > +        sbrec_mirror_set_type(sb_mirror, nb_mirror->type);
> > +    }
> > +}
> > +
> > +static void
> > +sync_mirrors(struct northd_input *input_data,
> > +            struct ovsdb_idl_txn *ovnsb_txn)
> > +{
> > +    struct shash sb_mirrors = SHASH_INITIALIZER(&sb_mirrors);
> > +    struct sset used_sb_mirrors = SSET_INITIALIZER(&used_sb_mirrors);
> > +
> > +    const struct sbrec_mirror *sb_mirror;
> > +    SBREC_MIRROR_TABLE_FOR_EACH (sb_mirror,
> input_data->sbrec_mirror_table) {
> > +        shash_add(&sb_mirrors, sb_mirror->name, sb_mirror);
> > +    }
> > +
> > +    const struct nbrec_mirror *nb_mirror;
> > +    NBREC_MIRROR_TABLE_FOR_EACH (nb_mirror,
> input_data->nbrec_mirror_table) {
> > +        sync_mirrors_iterate_nb_mirror(ovnsb_txn, nb_mirror->name,
> nb_mirror,
> > +                                     &sb_mirrors, &used_sb_mirrors);
> > +    }
> > +
> > +    const char *used_mirror;
> > +    const char *used_mirror_next;
> > +    SSET_FOR_EACH_SAFE (used_mirror, used_mirror_next,
> &used_sb_mirrors) {
> > +        shash_find_and_delete(&sb_mirrors, used_mirror);
> > +        sset_delete(&used_sb_mirrors, SSET_NODE_FROM_NAME(used_mirror));
> > +    }
> > +    sset_destroy(&used_sb_mirrors);
> > +
> > +    struct shash_node *node, *next;
> > +    SHASH_FOR_EACH_SAFE (node, next, &sb_mirrors) {
> > +        sbrec_mirror_delete(node->data);
> > +        shash_delete(&sb_mirrors, node);
> > +    }
> > +    shash_destroy(&sb_mirrors);
> > +}
> > +
> >  /*
> >   * struct 'dns_info' is used to sync the DNS records between OVN
> Northbound db
> >   * and Southbound db.
> > @@ -15794,6 +15965,7 @@ ovnnb_db_run(struct northd_input *input_data,
> >      sync_lbs(input_data, ovnsb_txn, &data->datapaths, &data->lbs);
> >      sync_port_groups(input_data, ovnsb_txn, &data->port_groups);
> >      sync_meters(input_data, ovnsb_txn, &data->meter_groups);
> > +    sync_mirrors(input_data, ovnsb_txn);
> >      sync_dns_entries(input_data, ovnsb_txn, &data->datapaths);
> >      cleanup_stale_fdb_entries(input_data, &data->datapaths);
> >      stopwatch_stop(CLEAR_LFLOWS_CTX_STOPWATCH_NAME, time_msec());
> > diff --git a/northd/northd.h b/northd/northd.h
> > index ea9bd5797..1670177ed 100644
> > --- a/northd/northd.h
> > +++ b/northd/northd.h
> > @@ -35,6 +35,7 @@ struct northd_input {
> >      const struct nbrec_acl_table *nbrec_acl_table;
> >      const struct nbrec_static_mac_binding_table
> >          *nbrec_static_mac_binding_table;
> > +    const struct nbrec_mirror_table *nbrec_mirror_table;
> >
> >      /* Southbound table references */
> >      const struct sbrec_sb_global_table *sbrec_sb_global_table;
> > @@ -53,6 +54,7 @@ struct northd_input {
> >      const struct sbrec_chassis_private_table
> *sbrec_chassis_private_table;
> >      const struct sbrec_static_mac_binding_table
> >          *sbrec_static_mac_binding_table;
> > +    const struct sbrec_mirror_table *sbrec_mirror_table;
> >
> >      /* Indexes */
> >      struct ovsdb_idl_index *sbrec_chassis_by_name;
> > diff --git a/ovn-nb.ovsschema b/ovn-nb.ovsschema
> > index 174364c8b..01de55222 100644
> > --- a/ovn-nb.ovsschema
> > +++ b/ovn-nb.ovsschema
> > @@ -1,7 +1,7 @@
> >  {
> >      "name": "OVN_Northbound",
> > -    "version": "6.3.0",
> > -    "cksum": "4042813038 31869",
> > +    "version": "6.4.0",
> > +    "cksum": "589874483 33352",
> >      "tables": {
> >          "NB_Global": {
> >              "columns": {
> > @@ -132,6 +132,11 @@
> >                                              "refType": "weak"},
> >                                   "min": 0,
> >                                   "max": 1}},
> > +                "mirror_rules": {"type": {"key": {"type": "uuid",
> > +                                          "refTable": "Mirror",
> > +                                          "refType": "weak"},
> > +                                  "min": 0,
> > +                                  "max": "unlimited"}},
> >                  "ha_chassis_group": {
> >                      "type": {"key": {"type": "uuid",
> >                                       "refTable": "HA_Chassis_Group",
> > @@ -301,6 +306,28 @@
> >                      "type": {"key": "string", "value": "string",
> >                               "min": 0, "max": "unlimited"}}},
> >              "isRoot": false},
> > +        "Mirror": {
> > +            "columns": {
> > +                "name": {"type": "string"},
> > +                "filter": {"type": {"key": {"type": "string",
> > +                                            "enum": ["set",
> ["from-lport",
> > +                                                             "to-lport",
> > +
>  "both"]]}}},
> > +                "sink":{"type": "string"},
> > +                "type": {"type": {"key": {"type": "string",
> > +                                            "enum": ["set", ["gre",
> > +
>  "erspan"]]}}},
> > +                "index": {"type": "integer"},
> > +                "src": {"type": {"key": {"type": "uuid",
> > +                                           "refTable":
> "Logical_Switch_Port",
> > +                                           "refType": "weak"},
> > +                                   "min": 0,
> > +                                   "max": "unlimited"}},
> > +                "external_ids": {
> > +                    "type": {"key": "string", "value": "string",
> > +                             "min": 0, "max": "unlimited"}}},
> > +            "indexes": [["name"]],
> > +            "isRoot": true},
> >          "Meter": {
> >              "columns": {
> >                  "name": {"type": "string"},
> > diff --git a/ovn-nb.xml b/ovn-nb.xml
> > index 7f207a413..671692b49 100644
> > --- a/ovn-nb.xml
> > +++ b/ovn-nb.xml
> > @@ -1582,6 +1582,11 @@
> >        </column>
> >      </group>
> >
> > +    <column name="mirror_rules">
> > +        Mirror rules that apply to logical switch port which is the
> source.
> > +        Please see the <ref table="Mirror"/> table.
> > +    </column>
> > +
> >      <column name="ha_chassis_group">
> >        References a row in the OVN Northbound database's
> >        <ref table="HA_Chassis_Group" db="OVN_Northbound"/> table.
> > @@ -2527,6 +2532,64 @@
> >      </column>
> >    </table>
> >
> > +  <table name="Mirror" title="Mirror Entry">
> > +    <p>
> > +      Each row in this table represents one Mirror that can be used for
> > +      port mirroring. These Mirrors are referenced by the
> > +      <ref column="mirror_rules" table="Logical_Switch_Port"/> column in
> > +      the <ref table="Logical_Switch_Port"/> table.
> > +    </p>
> > +
> > +    <column name="name">
> > +      <p>
> > +        Represents the name of the mirror.
> > +      </p>
> > +    </column>
> > +
> > +    <column name="filter">
> > +      <p>
> > +        The value of this field represents selection criteria of the
> mirror.
> > +        Supported values for filter to-lport / from-lport / both
> > +        to-lport - to mirror packets coming into logical port
> > +        from-lport - to mirror packets going out of logical port
> > +        both - to mirror packets coming into and going out of logical
> port.
> > +      </p>
> > +    </column>
> > +
> > +    <column name="sink">
> > +      <p>
> > +        The value of this field represents the destination/sink of the
> mirror.
> > +        The value it takes is an IP address of the sink port.
> > +      </p>
> > +    </column>
> > +
> > +    <column name="type">
> > +      <p>
> > +        The value of this field represents the type of the tunnel used
> for
> > +        sending the mirrored packets. Supported Tunnel types gre and
> erspan
> > +      </p>
> > +    </column>
> > +
> > +    <column name="index">
> > +      <p>
> > +        The value of this field represents the tunnel ID. Depending on
> the
> > +        tunnel type configured, GRE key value if type GRE and
> erspan_idx value
> > +        if ERSPAN
> > +      </p>
> > +    </column>
> > +
> > +    <column name="src">
> > +      <p>
> > +        The value of this field represents a list of source ports for
> the
> > +        mirror. Please see the <ref table="Logical_Switch_Port"/> table.
> > +      </p>
> > +    </column>
> > +
> > +    <column name="external_ids">
> > +      See <em>External IDs</em> at the beginning of this document.
> > +    </column>
> > +  </table>
> > +
> >    <table name="Meter" title="Meter entry">
> >      <p>
> >        Each row in this table represents a meter that can be used for
> QoS or
> > diff --git a/ovn-sb.ovsschema b/ovn-sb.ovsschema
> > index 576ebbdeb..b83134416 100644
> > --- a/ovn-sb.ovsschema
> > +++ b/ovn-sb.ovsschema
> > @@ -1,7 +1,7 @@
> >  {
> >      "name": "OVN_Southbound",
> > -    "version": "20.25.0",
> > -    "cksum": "53184112 28845",
> > +    "version": "20.26.0",
> > +    "cksum": "2344151793 30004",
> >      "tables": {
> >          "SB_Global": {
> >              "columns": {
> > @@ -142,6 +142,23 @@
> >              "indexes": [["datapath", "tunnel_key"],
> >                          ["datapath", "name"]],
> >              "isRoot": true},
> > +        "Mirror": {
> > +            "columns": {
> > +                "name": {"type": "string"},
> > +                "filter": {"type": {"key": {"type": "string",
> > +                                            "enum": ["set",
> > +                                                     ["from-lport",
> > +
> "to-lport","both"]]}}},
> > +                "sink":{"type": "string"},
> > +                "type": {"type": {"key": {"type": "string",
> > +                                            "enum": ["set",
> > +                                                     ["gre",
> "erspan"]]}}},
> > +                "index": {"type": "integer"},
> > +                "external_ids": {
> > +                    "type": {"key": "string", "value": "string",
> > +                             "min": 0, "max": "unlimited"}}},
> > +            "indexes": [["name"]],
> > +            "isRoot": true},
> >          "Meter": {
> >              "columns": {
> >                  "name": {"type": "string"},
> > @@ -230,6 +247,11 @@
> >                                                        "refTable":
> "Encap",
> >                                                        "refType":
> "weak"},
> >                                      "min": 0, "max": "unlimited"}},
> > +                "mirror_rules": {"type": {"key": {"type": "uuid",
> > +                                          "refTable": "Mirror",
> > +                                          "refType": "weak"},
> > +                                  "min": 0,
> > +                                  "max": "unlimited"}},
> >                  "mac": {"type": {"key": "string",
> >                                   "min": 0,
> >                                   "max": "unlimited"}},
> > diff --git a/ovn-sb.xml b/ovn-sb.xml
> > index 16f57b374..2dd2e304f 100644
> > --- a/ovn-sb.xml
> > +++ b/ovn-sb.xml
> > @@ -2869,6 +2869,51 @@ tcp.flags = RST;
> >      </column>
> >    </table>
> >
> > +  <table name="Mirror" title="Mirror Entry">
> > +    <p>
> > +      Each row in this table represents one Mirror that can be used for
> > +      port mirroring. These Mirrors are referenced by the
> > +      <ref column="mirror_rules" table="Port_Binding"/> column in
> > +      the <ref table="Port_Binding"/> table.
> > +    </p>
> > +
> > +    <column name="name">
> > +      <p>
> > +        Represents the name of the mirror.
> > +      </p>
> > +    </column>
> > +
> > +    <column name="filter">
> > +      <p>
> > +        The value of this field represents selection criteria of the
> mirror.
> > +      </p>
> > +    </column>
> > +
> > +    <column name="sink">
> > +      <p>
> > +        The value of this field represents the destination/sink of the
> mirror.
> > +      </p>
> > +    </column>
> > +
> > +    <column name="type">
> > +      <p>
> > +        The value of this field represents the type of the tunnel used
> for
> > +        sending the mirrored packets
> > +      </p>
> > +    </column>
> > +
> > +    <column name="index">
> > +      <p>
> > +        The value of this field represents the key/idx depending on the
> > +        tunnel type configured
> > +      </p>
> > +    </column>
> > +
> > +    <column name="external_ids">
> > +      See <em>External IDs</em> at the beginning of this document.
> > +    </column>
> > +  </table>
> > +
> >    <table name="Meter" title="Meter entry">
> >      <p>
> >        Each row in this table represents a meter that can be used for
> QoS or
> > @@ -3371,6 +3416,11 @@ tcp.flags = RST;
> >        </column>
> >      </group>
> >
> > +    <column name="mirror_rules">
> > +        Mirror rules that apply to the port binding.
> > +        Please see the <ref table="Mirror"/> table.
> > +    </column>
> > +
> >      <group title="Patch Options">
> >        <p>
> >          These options apply to logical ports with <ref column="type"/>
> of
> > diff --git a/tests/ovn-nbctl.at b/tests/ovn-nbctl.at
> > index 4d480e357..d79f9d929 100644
> > --- a/tests/ovn-nbctl.at
> > +++ b/tests/ovn-nbctl.at
> > @@ -435,6 +435,126 @@ AT_CHECK([ovn-nbctl meter-list], [0], [dnl
> >
> >  dnl
> ---------------------------------------------------------------------
> >
> > +OVN_NBCTL_TEST([ovn_nbctl_mirrors], [mirrors], [
> > +AT_CHECK([ovn-nbctl mirror-add mirror1 gre 0 from-lport 10.10.10.1])
> > +AT_CHECK([ovn-nbctl mirror-add mirror2 erspan 1 both 10.10.10.2])
> > +AT_CHECK([ovn-nbctl mirror-add mirror3 gre 2 to-lport 10.10.10.3])
> > +AT_CHECK([ovn-nbctl ls-add sw0])
> > +AT_CHECK([ovn-nbctl lsp-add sw0 sw0-port1])
> > +AT_CHECK([ovn-nbctl lsp-add sw0 sw0-port2])
> > +AT_CHECK([ovn-nbctl lsp-add sw0 sw0-port3])
> > +
> > +dnl Add duplicate mirror name
> > +AT_CHECK([ovn-nbctl mirror-add mirror1 gre 0 from-lport 10.10.10.5],
> [1], [], [stderr])
> > +AT_CHECK([grep 'already exists' stderr], [0], [ignore])
> > +
> > +dnl Attach invalid source port to mirror
> > +AT_CHECK([ovn-nbctl lsp-attach-mirror sw0-port4 mirror3], [1], [],
> [stderr])
> > +AT_CHECK([grep 'port name not found' stderr], [0], [ignore])
> > +
> > +dnl Attach source port to invalid mirror
> > +AT_CHECK([ovn-nbctl lsp-attach-mirror sw0-port3 mirror4], [1], [],
> [stderr])
> > +AT_CHECK([grep 'mirror name not found' stderr], [0], [ignore])
> > +
> > +dnl Attach source port to mirror
> > +AT_CHECK([ovn-nbctl lsp-attach-mirror sw0-port1 mirror3])
> > +
> > +dnl Attach one more source port to mirror
> > +AT_CHECK([ovn-nbctl lsp-attach-mirror sw0-port3 mirror3])
> > +
> > +dnl Verify if multiple ports are attached to the same mirror properly
> > +AT_CHECK([ovn-nbctl mirror-list], [0], [dnl
> > +mirror1:
> > +  Type     :  gre
> > +  Sink     :  10.10.10.1
> > +  Filter   :  from-lport
> > +  Index/Key:  0
> > +  Sources  :  None attached
> > +mirror2:
> > +  Type     :  erspan
> > +  Sink     :  10.10.10.2
> > +  Filter   :  both
> > +  Index/Key:  1
> > +  Sources  :  None attached
> > +mirror3:
> > +  Type     :  gre
> > +  Sink     :  10.10.10.3
> > +  Filter   :  to-lport
> > +  Index/Key:  2
> > +  Sources  :  sw0-port1  sw0-port3
> > +])
> > +
> > +dnl Detach one source port from mirror
> > +AT_CHECK([ovn-nbctl lsp-detach-mirror sw0-port3 mirror3])
> > +
> > +dnl Verify if detach source port from mirror happens properly
> > +AT_CHECK([ovn-nbctl mirror-list], [0], [dnl
> > +mirror1:
> > +  Type     :  gre
> > +  Sink     :  10.10.10.1
> > +  Filter   :  from-lport
> > +  Index/Key:  0
> > +  Sources  :  None attached
> > +mirror2:
> > +  Type     :  erspan
> > +  Sink     :  10.10.10.2
> > +  Filter   :  both
> > +  Index/Key:  1
> > +  Sources  :  None attached
> > +mirror3:
> > +  Type     :  gre
> > +  Sink     :  10.10.10.3
> > +  Filter   :  to-lport
> > +  Index/Key:  2
> > +  Sources  :  sw0-port1
> > +])
> > +
> > +dnl Delete a single mirror which has source attached.
> > +AT_CHECK([ovn-nbctl mirror-del mirror3])
> > +
> > +dnl Check if the detach happened from source properly
> > +AT_CHECK([ovn-nbctl get Logical_Switch_Port sw0-port1 mirror_rules |
> cut -b 3], [0], [dnl
> > +
> > +])
> > +
> > +dnl Check if the mirror deleted properly
> > +AT_CHECK([ovn-nbctl mirror-list], [0], [dnl
> > +mirror1:
> > +  Type     :  gre
> > +  Sink     :  10.10.10.1
> > +  Filter   :  from-lport
> > +  Index/Key:  0
> > +  Sources  :  None attached
> > +mirror2:
> > +  Type     :  erspan
> > +  Sink     :  10.10.10.2
> > +  Filter   :  both
> > +  Index/Key:  1
> > +  Sources  :  None attached
> > +])
> > +
> > +dnl Delete another mirror
> > +AT_CHECK([ovn-nbctl mirror-del mirror2])
> > +
> > +dnl Update the Sink address
> > +AT_CHECK([ovn-nbctl set mirror . sink=192.168.1.13])
> > +
> > +AT_CHECK([ovn-nbctl mirror-list], [0], [dnl
> > +mirror1:
> > +  Type     :  gre
> > +  Sink     :  192.168.1.13
> > +  Filter   :  from-lport
> > +  Index/Key:  0
> > +  Sources  :  None attached
> > +])
> > +
> > +dnl Delete all mirrors
> > +AT_CHECK([ovn-nbctl mirror-del])
> > +AT_CHECK([ovn-nbctl mirror-list], [0], [dnl
> > +])])
> > +
> > +dnl
> ---------------------------------------------------------------------
> > +
> >  OVN_NBCTL_TEST([ovn_nbctl_nats], [NATs], [
> >  AT_CHECK([ovn-nbctl lr-add lr0])
> >  AT_CHECK([ovn-nbctl lr-nat-add lr0 snatt 30.0.0.2 192.168.1.2], [1], [],
> > diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
> > index 02c00c062..466d16916 100644
> > --- a/tests/ovn-northd.at
> > +++ b/tests/ovn-northd.at
> > @@ -2319,6 +2319,108 @@ check_meter_by_name NOT meter_me__${acl1}
> meter_me__${acl2}
> >  AT_CLEANUP
> >  ])
> >
> > +OVN_FOR_EACH_NORTHD_NO_HV([
> > +AT_SETUP([Check NB-SB mirrors sync])
> > +AT_KEYWORDS([mirrors])
> > +ovn_start
> > +
> > +check ovn-nbctl --wait=sb mirror-add mirror1 erspan 0 both 10.10.10.2
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . Sink], [0], [dnl
> > +"10.10.10.2"
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . type], [0], [dnl
> > +erspan
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . index], [0], [dnl
> > +0
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . filter], [0], [dnl
> > +both
> > +])
> > +
> > +check ovn-nbctl --wait=sb \
> > +    -- set mirror . sink=192.168.1.13
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . Sink], [0], [dnl
> > +"192.168.1.13"
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . type], [0], [dnl
> > +erspan
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . index], [0], [dnl
> > +0
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . filter], [0], [dnl
> > +both
> > +])
> > +
> > +check ovn-nbctl --wait=sb \
> > +    -- set mirror . type=gre
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . type], [0], [dnl
> > +gre
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . Sink], [0], [dnl
> > +"192.168.1.13"
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . index], [0], [dnl
> > +0
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . filter], [0], [dnl
> > +both
> > +])
> > +
> > +check ovn-nbctl --wait=sb \
> > +    -- set mirror . index=12
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . index], [0], [dnl
> > +12
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . type], [0], [dnl
> > +gre
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . Sink], [0], [dnl
> > +"192.168.1.13"
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . filter], [0], [dnl
> > +both
> > +])
> > +
> > +check ovn-nbctl --wait=sb \
> > +    -- set mirror . filter=to-lport
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . filter], [0], [dnl
> > +to-lport
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . index], [0], [dnl
> > +12
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . type], [0], [dnl
> > +gre
> > +])
> > +
> > +AT_CHECK([ovn-sbctl get Mirror . Sink], [0], [dnl
> > +"192.168.1.13"
> > +])
> > +
> > +AT_CLEANUP
> > +])
> > +
> >  OVN_FOR_EACH_NORTHD_NO_HV([
> >  AT_SETUP([ACL skip hints for stateless config])
> >  AT_KEYWORDS([acl])
> > diff --git a/tests/ovn.at b/tests/ovn.at
> > index 9d52b1677..2cef53826 100644
> > --- a/tests/ovn.at
> > +++ b/tests/ovn.at
> > @@ -16237,6 +16237,520 @@ OVN_CLEANUP([hv1], [hv2])
> >  AT_CLEANUP
> >  ])
> >
> > +OVN_FOR_EACH_NORTHD([
> > +AT_SETUP([Mirror])
> > +AT_KEYWORDS([Mirror])
> > +ovn_start
> > +
> > +# Logical network:
> > +# One LR - R1 has switch ls1 (191.168.1.0/24) connected to it,
> > +# and has switch ls2 (172.16.1.0/24) connected to it.
> > +
> > +ovn-nbctl lr-add R1
> > +
> > +ovn-nbctl ls-add ls1
> > +ovn-nbctl ls-add ls2
> > +
> > +# Connect ls1 to R1
> > +ovn-nbctl lrp-add R1 ls1 00:00:00:01:02:f1 192.168.1.1/24
> > +ovn-nbctl lsp-add ls1 rp-ls1 -- set Logical_Switch_Port rp-ls1 \
> > +    type=router options:router-port=ls1 addresses=\"00:00:00:01:02:f1\"
> > +
> > +# Connect ls2 to R1
> > +ovn-nbctl lrp-add R1 ls2 00:00:00:01:02:f2 172.16.1.1/24
> > +ovn-nbctl lsp-add ls2 rp-ls2 -- set Logical_Switch_Port rp-ls2 \
> > +    type=router options:router-port=ls2 addresses=\"00:00:00:01:02:f2\"
> > +
> > +# Create logical port ls1-lp1 in ls1
> > +ovn-nbctl lsp-add ls1 ls1-lp1 \
> > +-- lsp-set-addresses ls1-lp1 "00:00:00:01:02:03 192.168.1.2"
> > +
> > +# Create logical port ls2-lp1 in ls2
> > +ovn-nbctl lsp-add ls2 ls2-lp1 \
> > +-- lsp-set-addresses ls2-lp1 "00:00:00:01:02:04 172.16.1.2"
> > +
> > +ovn-nbctl lsp-add ls1 ln-public
> > +ovn-nbctl lsp-set-type ln-public localnet
> > +ovn-nbctl lsp-set-addresses ln-public unknown
> > +ovn-nbctl lsp-set-options ln-public network_name=public
> > +
> > +# Create one hypervisor and create OVS ports corresponding to logical
> ports.
> > +net_add n1
> > +
> > +sim_add hv1
> > +as hv1
> > +ovs-vsctl add-br br-phys -- set bridge br-phys
> other-config:hwaddr=\"00:00:00:01:02:00\"
> > +ovn_attach n1 br-phys 192.168.1.11
> > +
> > +ovs-vsctl -- add-port br-int vif1 -- \
> > +    set interface vif1 external-ids:iface-id=ls1-lp1 \
> > +    options:tx_pcap=hv1/vif1-tx.pcap \
> > +    options:rxq_pcap=hv1/vif1-rx.pcap \
> > +    ofport-request=1
> > +
> > +ovs-vsctl -- add-port br-int vif2 -- \
> > +    set interface vif2 external-ids:iface-id=ls2-lp1 \
> > +    options:tx_pcap=hv1/vif2-tx.pcap \
> > +    options:rxq_pcap=hv1/vif2-rx.pcap \
> > +    ofport-request=1
> > +
> > +ovs-vsctl set open . external-ids:ovn-bridge-mappings=public:br-phys
> > +
> > +# Allow some time for ovn-northd and ovn-controller to catch up.
> > +wait_for_ports_up
> > +check ovn-nbctl --wait=hv sync
> > +ovn-nbctl dump-flows > sbflows
> > +AT_CAPTURE_FILE([sbflows])
> > +
> > +for i in 1 2; do
> > +    : > vif$i.expected
> > +done
> > +
> > +net_add n2
> > +
> > +sim_add hv2
> > +as hv2
> > +ovs-vsctl add-br br-phys -- set bridge br-phys
> other-config:hwaddr=\"00:00:00:02:02:00\"
> > +ovn_attach n2 br-phys 192.168.1.12
> > +
> > +OVN_POPULATE_ARP
> > +
> > +as hv1
> > +
> > +# test_ipv4_icmp_request INPORT ETH_SRC ETH_DST IPV4_SRC IPV4_DST
> IP_CHKSUM ICMP_CHKSUM [EXP_IP_CHKSUM EXP_ICMP_CHKSUM] ENCAP_TYPE FILTER
> > +#
> > +# Causes a packet to be received on INPORT.  The packet is an ICMPv4
> > +# request with ETH_SRC, ETH_DST, IPV4_SRC, IPV4_DST, IP_CHSUM and
> > +# ICMP_CHKSUM as specified.  If EXP_IP_CHKSUM and EXP_ICMP_CHKSUM are
> > +# provided, then it should be the ip and icmp checksums of the packet
> > +# responded; otherwise, no reply is expected.
> > +# In the absence of an ip checksum calculation helpers, this relies
> > +# on the caller to provide the checksums for the ip and icmp headers.
> > +# XXX This should be more systematic.
> > +#
> > +# INPORT is an lport number, e.g. 11 for vif11.
> > +# ETH_SRC and ETH_DST are each 12 hex digits.
> > +# IPV4_SRC and IPV4_DST are each 8 hex digits.
> > +# IP_CHSUM and ICMP_CHKSUM are each 4 hex digits.
> > +# EXP_IP_CHSUM and EXP_ICMP_CHKSUM are each 4 hex digits.
> > +# ENCAP_TYPE - gre or erspan
> > +# FILTER - Mirror Filter - to-lport / from-lport
> > +test_ipv4_icmp_request() {
> > +    local inport=$1 eth_src=$2 eth_dst=$3 ipv4_src=$4 ipv4_dst=$5
> ip_chksum=$6 icmp_chksum=$7
> > +    local exp_ip_chksum=$8 exp_icmp_chksum=$9 mirror_encap_type=${10}
> mirror_filter=${11}
> > +    shift; shift; shift; shift; shift; shift; shift
> > +    shift; shift; shift; shift;
> > +
> > +    # Use ttl to exercise section 4.2.2.9 of RFC1812
> > +    local ip_ttl=02
> > +    local icmp_id=5fbf
> > +    local icmp_seq=0001
> > +    local icmp_data=$(seq 1 56 | xargs printf "%02x")
> > +    local icmp_type_code_request=0800
> > +    local
> icmp_payload=${icmp_type_code_request}${icmp_chksum}${icmp_id}${icmp_seq}${icmp_data}
> > +    local
> packet=${eth_dst}${eth_src}08004500005400004000${ip_ttl}01${ip_chksum}${ipv4_src}${ipv4_dst}${icmp_payload}
> > +
> > +    as hv1 ovs-appctl netdev-dummy/receive vif$inport $packet
> > +
> > +    # Expect to receive the reply, if any. In same port where packet
> was sent.
> > +    # Note: src and dst fields are expected to be reversed.
> > +    local icmp_type_code_response=0000
> > +    local reply_icmp_ttl=fe
> > +    local
> reply_icmp_payload=${icmp_type_code_response}${exp_icmp_chksum}${icmp_id}${icmp_seq}${icmp_data}
> > +    local
> reply=${eth_src}${eth_dst}08004500005400004000${reply_icmp_ttl}01${exp_ip_chksum}${ipv4_dst}${ipv4_src}${reply_icmp_payload}
> > +    echo $reply >> vif$inport.expected
> > +    local remote_mac=000000020200
> > +    local local_mac=000000010200
> > +    if test ${mirror_encap_type} = "gre" ; then
> > +        local
> ipv4_gre=4500007e00004000402fb6e9c0a8010bc0a8010c2000655800000000
> > +        if test ${mirror_filter} = "to-lport" ; then
> > +            local
> mirror=${remote_mac}${local_mac}0800${ipv4_gre}${reply}
> > +        elif test ${mirror_filter} = "from-lport" ; then
> > +            local
> mirror=${remote_mac}${local_mac}0800${ipv4_gre}${packet}
> > +        fi
> > +    elif test ${mirror_encap_type} = "erspan" ; then
> > +        local ipv4_erspan=4500008600004000402fb6e1c0a8010bc0a8010c
> > +        local erspan_seq0=100088be000000001000000000000000
> > +        local erspan_seq1=100088be000000011000000000000000
> > +        if test ${mirror_filter} = "to-lport" ; then
> > +            local
> mirror=${remote_mac}${local_mac}0800${ipv4_erspan}${erspan_seq0}${reply}
> > +        elif test ${mirror_filter} = "from-lport" ; then
> > +            local
> mirror=${remote_mac}${local_mac}0800${ipv4_erspan}${erspan_seq1}${packet}
> > +        fi
> > +    fi
> > +    echo $mirror >> br-phys_n1.expected
> > +
> > +}
> > +
> > +# Set IPs
> > +rtr_l2_ip=$(ip_to_hex 172 16 1 1)
> > +l1_ip=$(ip_to_hex 192 168 1 2)
> > +
> > +check ovn-nbctl mirror-add mirror0 gre 0 to-lport 192.168.1.12
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror0
> > +
> > +# Send ping packet and check for mirrored packet of the reply
> > +test_ipv4_icmp_request 1 000000010203 0000000102f1 $l1_ip $rtr_l2_ip
> 0000 8510 03ff 8d10 "gre" "to-lport"
> > +
> > +OVN_CHECK_PACKETS_CONTAIN([hv1/br-phys_n1-tx.pcap],
> [br-phys_n1.expected])
> > +OVN_CHECK_PACKETS([hv1/vif1-tx.pcap], [vif1.expected])
> > +
> > +as hv1 reset_pcap_file vif1 hv1/vif1
> > +as hv1 reset_pcap_file br-phys_n1 hv1/br-phys_n1
> > +rm -f br-phys_n1.expected
> > +rm -f vif1.expected
> > +
> > +check ovn-nbctl set mirror . type=erspan
> > +
> > +# Send ping packet and check for mirrored packet of the reply
> > +test_ipv4_icmp_request 1 000000010203 0000000102f1 $l1_ip $rtr_l2_ip
> 0000 8510 03ff 8d10 "erspan" "to-lport"
> > +
> > +OVN_CHECK_PACKETS_CONTAIN([hv1/br-phys_n1-tx.pcap],
> [br-phys_n1.expected])
> > +OVN_CHECK_PACKETS([hv1/vif1-tx.pcap], [vif1.expected])
> > +
> > +as hv1 reset_pcap_file vif1 hv1/vif1
> > +as hv1 reset_pcap_file br-phys_n1 hv1/br-phys_n1
> > +rm -f br-phys_n1.expected
> > +rm -f vif1.expected
> > +
> > +check ovn-nbctl set mirror . filter=from-lport
> > +
> > +# Send ping packet and check for mirrored packet of the request
> > +test_ipv4_icmp_request 1 000000010203 0000000102f1 $l1_ip $rtr_l2_ip
> 0000 8510 03ff 8d10 "erspan" "from-lport"
> > +
> > +OVN_CHECK_PACKETS_CONTAIN([hv1/br-phys_n1-tx.pcap],
> [br-phys_n1.expected])
> > +OVN_CHECK_PACKETS([hv1/vif1-tx.pcap], [vif1.expected])
> > +
> > +as hv1 reset_pcap_file vif1 hv1/vif1
> > +as hv1 reset_pcap_file br-phys_n1 hv1/br-phys_n1
> > +rm -f br-phys_n1.expected
> > +rm -f vif1.expected
> > +
> > +check ovn-nbctl set mirror . type=gre
> > +
> > +# Send ping packet and check for mirrored packet of the request
> > +test_ipv4_icmp_request 1 000000010203 0000000102f1 $l1_ip $rtr_l2_ip
> 0000 8510 03ff 8d10 "gre" "from-lport"
> > +
> > +OVN_CHECK_PACKETS_CONTAIN([hv1/br-phys_n1-tx.pcap],
> [br-phys_n1.expected])
> > +OVN_CHECK_PACKETS([hv1/vif1-tx.pcap], [vif1.expected])
> > +
> > +echo "---------OVN NB Mirror-----"
> > +ovn-nbctl mirror-list
> > +
> > +echo "---------OVS Mirror----"
> > +ovs-vsctl list Mirror
> > +
> > +echo "-----------------------"
> > +
> > +echo "Verifying Mirror deletion in OVS"
> > +# Set vif1 iface-id such that OVN releases port binding
> > +check ovs-vsctl set interface vif1 external_ids:iface-id=foo
> > +check ovn-nbctl --wait=hv sync
> > +
> > +AT_CHECK([as hv1 ovs-vsctl list Mirror], [0], [dnl
> > +])
> > +
> > +# Set vif1 iface-id back to ls1-lp1
> > +check ovs-vsctl set interface vif1 external_ids:iface-id=ls1-lp1
> > +check ovn-nbctl --wait=hv sync
> > +
> > +OVS_WAIT_UNTIL([test $(as hv1 ovs-vsctl get Mirror mirror0 name) =
> "mirror0"])
> > +
> > +# Delete vif1 so that OVN releases port binding
> > +check ovs-vsctl del-port br-int vif1
> > +check ovn-nbctl --wait=hv sync
> > +
> > +OVS_WAIT_UNTIL([test 0 = $(as hv1 ovs-vsctl list Mirror | wc -l)])
> > +
> > +OVN_CLEANUP([hv1], [hv2])
> > +AT_CLEANUP
> > +])
> > +
> > +OVN_FOR_EACH_NORTHD([
> > +AT_SETUP([Mirror test bulk updates])
> > +AT_KEYWORDS([Mirror test bulk updates])
> > +ovn_start
> > +
> > +# Logical network:
> > +# One LR - R1 has switch ls1 (191.168.1.0/24) connected to it,
> > +# and has switch ls2 (172.16.1.0/24) connected to it.
> > +
> > +ovn-nbctl lr-add R1
> > +
> > +ovn-nbctl ls-add ls1
> > +ovn-nbctl ls-add ls2
> > +
> > +# Connect ls1 to R1
> > +ovn-nbctl lrp-add R1 ls1 00:00:00:01:02:f1 192.168.1.1/24
> > +ovn-nbctl lsp-add ls1 rp-ls1 -- set Logical_Switch_Port rp-ls1 \
> > +    type=router options:router-port=ls1 addresses=\"00:00:00:01:02:f1\"
> > +
> > +# Connect ls2 to R1
> > +ovn-nbctl lrp-add R1 ls2 00:00:00:01:02:f2 172.16.1.1/24
> > +ovn-nbctl lsp-add ls2 rp-ls2 -- set Logical_Switch_Port rp-ls2 \
> > +    type=router options:router-port=ls2 addresses=\"00:00:00:01:02:f2\"
> > +
> > +# Create logical port ls1-lp1 in ls1
> > +ovn-nbctl lsp-add ls1 ls1-lp1 \
> > +-- lsp-set-addresses ls1-lp1 "00:00:00:01:02:03 192.168.1.2"
> > +
> > +# Create logical port ls1-lp2 in ls1
> > +ovn-nbctl lsp-add ls1 ls1-lp2 \
> > +-- lsp-set-addresses ls1-lp2 "00:00:00:01:03:03 192.168.1.3"
> > +
> > +# Create logical port ls2-lp1 in ls2
> > +ovn-nbctl lsp-add ls2 ls2-lp1 \
> > +-- lsp-set-addresses ls2-lp1 "00:00:00:01:02:04 172.16.1.2"
> > +
> > +# Create logical port ls2-lp2 in ls2
> > +ovn-nbctl lsp-add ls2 ls2-lp2 \
> > +-- lsp-set-addresses ls2-lp2 "00:00:00:01:03:04 172.16.1.3"
> > +
> > +ovn-nbctl lsp-add ls1 ln-public
> > +ovn-nbctl lsp-set-type ln-public localnet
> > +ovn-nbctl lsp-set-addresses ln-public unknown
> > +ovn-nbctl lsp-set-options ln-public network_name=public
> > +
> > +# Create 2 hypervisors and create OVS ports corresponding to logical
> ports for hv1.
> > +net_add n1
> > +
> > +sim_add hv1
> > +as hv1
> > +ovs-vsctl add-br br-phys -- set bridge br-phys
> other-config:hwaddr=\"00:00:00:01:02:00\"
> > +ovn_attach n1 br-phys 192.168.1.11
> > +
> > +net_add n2
> > +
> > +sim_add hv2
> > +as hv2
> > +ovs-vsctl add-br br-phys -- set bridge br-phys
> other-config:hwaddr=\"00:00:00:02:02:00\"
> > +ovn_attach n2 br-phys 192.168.1.12
> > +
> > +OVN_POPULATE_ARP
> > +
> > +as hv1
> > +
> > +ovs-vsctl -- add-port br-int vif1 -- \
> > +    set interface vif1 external-ids:iface-id=ls1-lp1
> > +
> > +ovs-vsctl -- add-port br-int vif2 -- \
> > +    set interface vif2 external-ids:iface-id=ls2-lp1
> > +
> > +ovs-vsctl -- add-port br-int vif3 -- \
> > +    set interface vif3 external-ids:iface-id=ls1-lp2
> > +
> > +ovs-vsctl -- add-port br-int vif4 -- \
> > +    set interface vif4 external-ids:iface-id=ls2-lp2
> > +
> > +ovs-vsctl set open . external-ids:ovn-bridge-mappings=public:br-phys
> > +
> > +# Allow some time for ovn-northd and ovn-controller to catch up.
> > +wait_for_ports_up
> > +check ovn-nbctl --wait=hv sync
> > +ovn-nbctl dump-flows > sbflows
> > +AT_CAPTURE_FILE([sbflows])
> > +
> > +check ovn-nbctl mirror-add mirror0 gre 0 to-lport 192.168.1.12
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl --wait=hv sync
> > +origA=$(ovs-vsctl get Mirror mirror0 select_dst_port)
> > +check ovn-nbctl lsp-attach-mirror ls2-lp1 mirror0
> > +
> > +check ovn-nbctl mirror-add mirror1 gre 1 to-lport 192.168.1.12
> > +check ovn-nbctl lsp-attach-mirror ls1-lp2 mirror1
> > +check ovn-nbctl --wait=hv sync
> > +origB=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +check ovn-nbctl lsp-attach-mirror ls2-lp2 mirror1
> > +
> > +check ovn-nbctl --wait=hv sync
> > +
> > +as hv1
> > +orig1=$(ovs-vsctl get Mirror mirror0 select_dst_port)
> > +orig2=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +
> > +check ovn-nbctl mirror-del
> > +check ovn-nbctl --wait=hv sync
> > +
> > +check ovn-nbctl mirror-add mirror0 gre 0 to-lport 192.168.1.12
> > +check ovn-nbctl mirror-add mirror1 gre 1 to-lport 192.168.1.12
> > +
> > +# Attaches multiple mirrors
> > +
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl lsp-attach-mirror ls2-lp1 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls2-lp2 mirror1
> > +check ovn-nbctl lsp-attach-mirror ls1-lp2 mirror1
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +
> > +check ovn-nbctl --wait=hv sync
> > +
> > +as hv1
> > +new1=$(ovs-vsctl get Mirror mirror0 select_dst_port)
> > +new2=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +
> > +AT_CHECK([test "$orig1" = "$new1"], [0], [])
> > +
> > +AT_CHECK([test "$orig2" = "$new2"], [0], [])
> > +
> > +# Equal detaches and attaches
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl lsp-detach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl lsp-detach-mirror ls2-lp1 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls1-lp2 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls2-lp2 mirror0
> > +
> > +check ovn-nbctl lsp-detach-mirror ls1-lp2 mirror1
> > +check ovn-nbctl lsp-detach-mirror ls2-lp2 mirror1
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror1
> > +check ovn-nbctl lsp-attach-mirror ls2-lp1 mirror1
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +
> > +check ovn-nbctl --wait=hv sync
> > +
> > +# Make sure that ovn-controller has not asserted.
> > +AT_CHECK([kill -0 $(cat hv1/ovn-controller.pid)])
> > +
> > +as hv1
> > +new1=$(ovs-vsctl get Mirror mirror0 select_dst_port)
> > +new2=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +
> > +AT_CHECK([test "$orig1" = "$new2"], [0], [])
> > +
> > +AT_CHECK([test "$orig2" = "$new1"], [0], [])
> > +
> > +# Detaches more than attaches
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl lsp-detach-mirror ls1-lp1 mirror1
> > +check ovn-nbctl lsp-detach-mirror ls2-lp1 mirror1
> > +check ovn-nbctl lsp-detach-mirror ls1-lp2 mirror0
> > +check ovn-nbctl lsp-detach-mirror ls2-lp2 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls1-lp2 mirror1
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +
> > +check ovn-nbctl --wait=hv sync
> > +# Make sure that ovn-controller has not asserted.
> > +AT_CHECK([kill -0 $(cat hv1/ovn-controller.pid)])
> > +
> > +as hv1
> > +new1=$(ovs-vsctl get Mirror mirror0 select_dst_port)
> > +new2=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +
> > +AT_CHECK([test "$origA" = "$new1"], [0], [])
> > +
> > +AT_CHECK([test "$origB" = "$new2"], [0], [])
> > +
> > +# Attaches more than detaches
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl lsp-detach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl lsp-detach-mirror ls1-lp2 mirror1
> > +check ovn-nbctl lsp-attach-mirror ls1-lp2 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls2-lp2 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror1
> > +check ovn-nbctl lsp-attach-mirror ls2-lp1 mirror1
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +
> > +check ovn-nbctl --wait=hv sync
> > +# Make sure that ovn-controller has not asserted.
> > +AT_CHECK([kill -0 $(cat hv1/ovn-controller.pid)])
> > +
> > +as hv1
> > +new1=$(ovs-vsctl get Mirror mirror0 select_dst_port)
> > +new2=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +
> > +AT_CHECK([test "$orig1" = "$new2"], [0], [])
> > +
> > +AT_CHECK([test "$orig2" = "$new1"], [0], [])
> > +
> > +# Detaches all
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl lsp-detach-mirror ls1-lp2 mirror0
> > +check ovn-nbctl lsp-detach-mirror ls2-lp2 mirror0
> > +check ovn-nbctl lsp-detach-mirror ls1-lp1 mirror1
> > +check ovn-nbctl lsp-detach-mirror ls2-lp1 mirror1
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +check ovn-nbctl --wait=hv sync
> > +
> > +OVS_WAIT_UNTIL([test 0 = $(as hv1 ovs-vsctl list Mirror | wc -l)])
> > +
> > +check ovn-nbctl mirror-add mirror2 gre 2 to-lport 192.168.1.12
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror2
> > +check ovn-nbctl --wait=hv sync
> > +
> > +# Attaches SAME port to multiple mirrors
> > +# and detaches it from existing mirror.
> > +# More attach than detach
> > +
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror1
> > +check ovn-nbctl lsp-detach-mirror ls1-lp1 mirror2
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +
> > +check ovn-nbctl --wait=hv sync
> > +
> > +as hv1
> > +new1=$(ovs-vsctl get Mirror mirror0 select_dst_port)
> > +new2=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +
> > +AT_CHECK([test "$origA" = "$new1"], [0], [])
> > +AT_CHECK([test "$origA" = "$new2"], [0], [])
> > +OVS_WAIT_UNTIL([test 0 = $(as hv1 ovs-vsctl list Mirror mirror2 | wc
> -l)])
> > +
> > +check ovn-nbctl mirror-add mirror3 gre 3 to-lport 192.168.1.12
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror3
> > +check ovn-nbctl --wait=hv sync
> > +
> > +# Detaches SAME port from multiple mirrors
> > +# and attaches it to existing mirror.
> > +# More detach than attach
> > +
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl lsp-detach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl lsp-detach-mirror ls1-lp1 mirror3
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror2
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +
> > +check ovn-nbctl --wait=hv sync
> > +
> > +as hv1
> > +new1=$(ovs-vsctl get Mirror mirror1 select_dst_port)
> > +new2=$(ovs-vsctl get Mirror mirror2 select_dst_port)
> > +
> > +AT_CHECK([test "$origA" = "$new1"], [0], [])
> > +AT_CHECK([test "$origA" = "$new2"], [0], [])
> > +OVS_WAIT_UNTIL([test 0 = $(as hv1 ovs-vsctl list Mirror mirror0 | wc
> -l)])
> > +OVS_WAIT_UNTIL([test 0 = $(as hv1 ovs-vsctl list Mirror mirror3 | wc
> -l)])
> > +
> > +check ovn-nbctl mirror-del
> > +check ovn-nbctl --wait=hv sync
> > +check ovn-nbctl mirror-add mirror0 erspan 0 to-lport 192.168.1.12
> > +check ovn-nbctl lsp-attach-mirror ls1-lp1 mirror0
> > +check ovn-nbctl --wait=hv sync
> > +
> > +# Make sure different fields of mirror resource set from OVN
> > +# propagates to OVS correctly
> > +
> > +check as hv1 ovn-appctl -t ovn-controller debug/pause
> > +check ovn-nbctl set mirror . filter=from-lport
> > +check ovn-nbctl set mirror . type=gre
> > +check ovn-nbctl set mirror . index=123
> > +check as hv1 ovn-appctl -t ovn-controller debug/resume
> > +
> > +check ovn-nbctl --wait=hv sync
> > +
> > +as hv1
> > +new1=$(ovs-vsctl get Mirror mirror0 select_src_port)
> > +AT_CHECK([test "$origA" = "$new1"], [0], [])
> > +type=$(ovs-vsctl get Interface ovn-mirror0 type)
> > +OVS_WAIT_UNTIL([test "gre" = "$type"])
> > +index=$(ovs-vsctl get Interface ovn-mirror0 options:key | grep 123 | wc
> -l)
> > +OVS_WAIT_UNTIL([test "1" = "$index"])
> > +
> > +OVN_CLEANUP([hv1],[hv2])
> > +AT_CLEANUP
> > +])
> >
> >  OVN_FOR_EACH_NORTHD([
> >  AT_SETUP([Port Groups])
> > diff --git a/utilities/ovn-nbctl.c b/utilities/ovn-nbctl.c
> > index 811468dc6..af2e61435 100644
> > --- a/utilities/ovn-nbctl.c
> > +++ b/utilities/ovn-nbctl.c
> > @@ -271,6 +271,19 @@ QoS commands:\n\
> >                              remove QoS rules from SWITCH\n\
> >    qos-list SWITCH           print QoS rules for SWITCH\n\
> >  \n\
> > +Mirror commands:\n\
> > +  mirror-add NAME TYPE INDEX FILTER IP\n\
> > +                            add a mirror with given name\n\
> > +                            specify TYPE 'gre' or 'erspan'\n\
> > +                            specify the tunnel INDEX value\n\
> > +                                (indicates key if GRE\n\
> > +                                 erpsan_idx if ERSPAN)\n\
> > +                            specify FILTER for mirroring selection\n\
> > +                                'to-lport' / 'from-lport' / 'both'\n\
> > +                            specify Sink / Destination i.e. Remote IP\n\
> > +  mirror-del [NAME]         remove mirrors\n\
> > +  mirror-list               print mirrors\n\
> > +\n\
> >  Meter commands:\n\
> >    [--fair]\n\
> >    meter-add NAME ACTION RATE UNIT [BURST]\n\
> > @@ -311,6 +324,8 @@ Logical switch port commands:\n\
> >                              set dhcpv6 options for PORT\n\
> >    lsp-get-dhcpv6-options PORT  get the dhcpv6 options for PORT\n\
> >    lsp-get-ls PORT           get the logical switch which the port
> belongs to\n\
> > +  lsp-attach-mirror PORT MIRROR   attach source PORT to MIRROR\n\
> > +  lsp-detach-mirror PORT MIRROR   detach source PORT from MIRROR\n\
> >  \n\
> >  Forwarding group commands:\n\
> >    [--liveness]\n\
> > @@ -1685,6 +1700,130 @@ nbctl_pre_lsp_type(struct ctl_context *ctx)
> >      ovsdb_idl_add_column(ctx->idl, &nbrec_logical_switch_port_col_type);
> >  }
> >
> > +static void
> > +nbctl_pre_lsp_mirror(struct ctl_context *ctx)
> > +{
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_logical_switch_port_col_name);
> > +    ovsdb_idl_add_column(ctx->idl,
> > +                         &nbrec_logical_switch_port_col_mirror_rules);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_name);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_src);
> > +}
> > +
> > +static int
> > +mirror_cmp(const void *mirror1_, const void *mirror2_)
> > +{
> > +    const struct nbrec_mirror *const *mirror_1 = mirror1_;
> > +    const struct nbrec_mirror *const *mirror_2 = mirror2_;
> > +
> > +    const struct nbrec_mirror *mirror1 = *mirror_1;
> > +    const struct nbrec_mirror *mirror2 = *mirror_2;
> > +
> > +    return strcmp(mirror1->name,mirror2->name);
> > +}
> > +
> > +static char * OVS_WARN_UNUSED_RESULT
> > +mirror_by_name_or_uuid(struct ctl_context *ctx, const char *id,
> > +                    bool must_exist,
> > +                    const struct nbrec_mirror **mirror_p)
> > +{
> > +    const struct nbrec_mirror *mirror = NULL;
> > +    *mirror_p = NULL;
> > +
> > +    struct uuid mirror_uuid;
> > +    bool is_uuid = uuid_from_string(&mirror_uuid, id);
> > +    if (is_uuid) {
> > +        mirror = nbrec_mirror_get_for_uuid(ctx->idl, &mirror_uuid);
> > +    }
> > +
> > +    if (!mirror) {
> > +        NBREC_MIRROR_FOR_EACH (mirror, ctx->idl) {
> > +            if (!strcmp(mirror->name, id)) {
> > +                break;
> > +            }
> > +        }
> > +    }
> > +
> > +    if (!mirror && must_exist) {
> > +        return xasprintf("%s: mirror %s not found",
> > +                         id, is_uuid ? "UUID" : "name");
> > +    }
> > +
> > +    *mirror_p = mirror;
> > +    return NULL;
> > +}
> > +
> > +static void
> > +nbctl_lsp_attach_mirror(struct ctl_context *ctx)
> > +{
> > +    const char *port = ctx->argv[1];
> > +    const char *mirror_name = ctx->argv[2];
> > +    const struct nbrec_logical_switch_port *lsp = NULL;
> > +    const struct nbrec_mirror *mirror;
> > +
> > +    char *error;
> > +
> > +    error = lsp_by_name_or_uuid(ctx, port, true, &lsp);
> > +    if (error) {
> > +        ctx->error = error;
> > +        return;
> > +    }
> > +
> > +
> > +    /*check if a mirror rule actually exists on that name or not*/
> > +    error = mirror_by_name_or_uuid(ctx, mirror_name, true, &mirror);
> > +    if (error) {
> > +        ctx->error = error;
> > +        return;
> > +    }
> > +
> > +    /* Check if same mirror rule already exists for the lsp */
> > +    for (size_t i = 0; i < lsp->n_mirror_rules; i++) {
> > +        if (!mirror_cmp(&lsp->mirror_rules[i], &mirror)) {
> > +            bool may_exist = shash_find(&ctx->options, "--may-exist")
> != NULL;
> > +            if (!may_exist) {
> > +                ctl_error(ctx, "Same mirror already existed on the lsp
> %s.",
> > +                          ctx->argv[1]);
> > +                return;
> > +            }
> > +            return;
> > +        }
> > +    }
> > +
> > +    nbrec_logical_switch_port_update_mirror_rules_addvalue(lsp, mirror);
> > +    nbrec_mirror_update_src_addvalue(mirror,lsp);
> > +
> > +}
> > +
> > +static void
> > +nbctl_lsp_detach_mirror(struct ctl_context *ctx)
> > +{
> > +    const char *port = ctx->argv[1];
> > +    const char *mirror_name = ctx->argv[2];
> > +    const struct nbrec_logical_switch_port *lsp = NULL;
> > +    const struct nbrec_mirror *mirror;
> > +
> > +    char *error;
> > +
> > +    error = lsp_by_name_or_uuid(ctx, port, true, &lsp);
> > +    if (error) {
> > +        ctx->error = error;
> > +        return;
> > +    }
> > +
> > +
> > +    /*check if a mirror rule actually exists on that name or not*/
> > +    error = mirror_by_name_or_uuid(ctx, mirror_name, true, &mirror);
> > +    if (error) {
> > +        ctx->error = error;
> > +        return;
> > +    }
> > +
> > +    nbrec_logical_switch_port_update_mirror_rules_delvalue(lsp, mirror);
> > +    nbrec_mirror_update_src_delvalue(mirror,lsp);
> > +
> > +}
> > +
> >  static void
> >  nbctl_lsp_set_type(struct ctl_context *ctx)
> >  {
> > @@ -7241,6 +7380,211 @@ cmd_ha_ch_grp_set_chassis_prio(struct
> ctl_context *ctx)
> >      nbrec_ha_chassis_set_priority(ha_chassis, priority);
> >  }
> >
> > +static char * OVS_WARN_UNUSED_RESULT
> > +parse_filter(const char *arg, const char **selection_p)
> > +{
> > +    /* Validate selection.  Only require the first letter. */
> > +    if (arg[0] == 't') {
> > +        *selection_p = "to-lport";
> > +    } else if (arg[0] == 'f') {
> > +        *selection_p = "from-lport";
> > +    } else if (arg[0] == 'b') {
> > +        *selection_p = "both";
> > +    } else {
> > +        *selection_p = NULL;
> > +        return xasprintf("%s: selection must be \"to-lport\" or "
> > +                         "\"from-lport\" or \"both\" ", arg);
> > +    }
> > +    return NULL;
> > +}
> > +
> > +static char * OVS_WARN_UNUSED_RESULT
> > +parse_type(const char *arg, const char **type_p)
> > +{
> > +    /* Validate type.  Only require the first letter. */
> > +    if (arg[0] == 'g') {
> > +        *type_p = "gre";
> > +    } else if (arg[0] == 'e') {
> > +        *type_p = "erspan";
> > +    } else {
> > +        *type_p = NULL;
> > +        return xasprintf("%s: type must be \"gre\" or "
> > +                         "\"erspan\"", arg);
> > +    }
> > +    return NULL;
> > +}
> > +
> > +static void
> > +nbctl_pre_mirror_add(struct ctl_context *ctx)
> > +{
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_name);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_filter);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_index);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_sink);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_type);
> > +}
> > +
> > +static void
> > +nbctl_mirror_add(struct ctl_context *ctx)
> > +{
> > +    const char *filter = NULL;
> > +    const char *sink_ip = NULL;
> > +    const char *type = NULL;
> > +    const char *name = NULL;
> > +    char *new_sink_ip = NULL;
> > +    int64_t index;
> > +    char *error = NULL;
> > +    const struct nbrec_mirror *mirror_check = NULL;
> > +
> > +    /* Mirror Name */
> > +    name = ctx->argv[1];
> > +    NBREC_MIRROR_FOR_EACH (mirror_check, ctx->idl) {
> > +        if (!strcmp(mirror_check->name, name)) {
> > +            ctl_error(ctx, "Mirror with %s name already exists.",
> > +                      name);
> > +            return;
> > +        }
> > +    }
> > +
> > +    /* Tunnel Type - GRE/ERSPAN */
> > +    error = parse_type(ctx->argv[2], &type);
> > +    if (error) {
> > +        ctx->error = error;
> > +        return;
> > +    }
> > +
> > +    /* tunnel index / GRE key / ERSPAN idx */
> > +    index = atoi(ctx->argv[3]);
> > +
> > +    /* Filter for mirroring */
> > +    error = parse_filter(ctx->argv[4], &filter);
> > +    if (error) {
> > +        ctx->error = error;
> > +        return;
> > +    }
> > +
> > +    /* Destination / Sink details */
> > +    sink_ip = ctx->argv[5];
> > +
> > +    /* check if it is a valid ip */
> > +    new_sink_ip = normalize_ipv4_addr_str(sink_ip);
> > +    if (!new_sink_ip) {
> > +        new_sink_ip = normalize_ipv6_addr_str(sink_ip);
> > +    }
> > +
> > +    if (new_sink_ip) {
> > +        free(new_sink_ip);
> > +    } else {
> > +        ctl_error(ctx, "Invalid sink ip: %s", sink_ip);
> > +        return;
> > +    }
> > +
> > +    /* Create the mirror. */
> > +    struct nbrec_mirror *mirror = nbrec_mirror_insert(ctx->txn);
> > +    nbrec_mirror_set_name(mirror, name);
> > +    nbrec_mirror_set_index(mirror, index);
> > +    nbrec_mirror_set_filter(mirror, filter);
> > +    nbrec_mirror_set_type(mirror, type);
> > +    nbrec_mirror_set_sink(mirror, sink_ip);
> > +
> > +}
> > +
> > +static void
> > +nbctl_pre_mirror_del(struct ctl_context *ctx)
> > +{
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_name);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_src);
> > +}
> > +
> > +static void
> > +nbctl_mirror_del(struct ctl_context *ctx)
> > +{
> > +    const struct nbrec_mirror *mirror, *next;
> > +
> > +    /* If a name is not specified, delete all mirrors. */
> > +    if (ctx->argc == 1) {
> > +        NBREC_MIRROR_FOR_EACH_SAFE (mirror, next, ctx->idl) {
> > +            nbrec_mirror_delete(mirror);
> > +        }
> > +        return;
> > +    }
> > +
> > +    /* Remove the matching mirror. */
> > +    NBREC_MIRROR_FOR_EACH (mirror, ctx->idl) {
> > +        if (strcmp(ctx->argv[1], mirror->name)) {
> > +            continue;
> > +        }
> > +        nbrec_mirror_delete(mirror);
> > +        return;
> > +    }
> > +}
> > +
> > +static void
> > +nbctl_pre_mirror_list(struct ctl_context *ctx)
> > +{
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_logical_switch_port_col_name);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_name);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_filter);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_index);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_sink);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_type);
> > +    ovsdb_idl_add_column(ctx->idl, &nbrec_mirror_col_src);
> > +}
> > +
> > +static void
> > +nbctl_mirror_list(struct ctl_context *ctx)
> > +{
> > +
> > +    const struct nbrec_mirror **mirrors = NULL;
> > +    const struct nbrec_mirror *mirror;
> > +    size_t n_capacity = 0;
> > +    size_t n_mirrors = 0;
> > +
> > +    NBREC_MIRROR_FOR_EACH (mirror, ctx->idl) {
> > +        if (n_mirrors == n_capacity) {
> > +            mirrors = x2nrealloc(mirrors, &n_capacity, sizeof *mirrors);
> > +        }
> > +
> > +        mirrors[n_mirrors] = mirror;
> > +        n_mirrors++;
> > +    }
> > +
> > +    if (n_mirrors) {
> > +        qsort(mirrors, n_mirrors, sizeof *mirrors, mirror_cmp);
> > +    }
> > +
> > +    for (size_t i = 0; i < n_mirrors; i++) {
> > +        mirror = mirrors[i];
> > +        ds_put_format(&ctx->output, "%s:\n", mirror->name);
> > +        /* print all the values */
> > +        ds_put_format(&ctx->output, "  Type     :  %s\n", mirror->type);
> > +        ds_put_format(&ctx->output, "  Sink     :  %s\n", mirror->sink);
> > +        ds_put_format(&ctx->output, "  Filter   :  %s\n",
> mirror->filter);
> > +        ds_put_format(&ctx->output, "  Index/Key:  %ld\n",
> > +                                                (long int)
> mirror->index);
> > +        ds_put_cstr(&ctx->output,   "  Sources  :");
> > +        if (mirror->n_src > 0) {
> > +            struct svec srcs;
> > +            const char *src;
> > +            size_t j;
> > +            svec_init(&srcs);
> > +            for (j = 0; j < mirror->n_src; j++) {
> > +                svec_add(&srcs, mirror->src[j]->name);
> > +            }
> > +            svec_sort(&srcs);
> > +            SVEC_FOR_EACH (j, src, &srcs) {
> > +                ds_put_format(&ctx->output, "  %s", src);
> > +            }
> > +            svec_destroy(&srcs);
> > +        } else {
> > +            ds_put_cstr(&ctx->output, "  None attached");
> > +        }
> > +        ds_put_cstr(&ctx->output, "\n");
> > +    }
> > +
> > +    free(mirrors);
> > +}
> > +
> >  static const struct ctl_table_class tables[NBREC_N_TABLES] = {
> >      [NBREC_TABLE_DHCP_OPTIONS].row_ids
> >      = {{&nbrec_logical_switch_port_col_name, NULL,
> > @@ -7334,6 +7678,15 @@ static const struct ctl_command_syntax
> nbctl_commands[] = {
> >      { "qos-list", 1, 1, "SWITCH", nbctl_pre_qos_list, nbctl_qos_list,
> >        NULL, "", RO },
> >
> > +    /* mirror commands. */
> > +    { "mirror-add", 5, 5,
> > +      "NAME TYPE INDEX FILTER IP",
> > +      nbctl_pre_mirror_add, nbctl_mirror_add, NULL, "--may-exist", RW },
> > +    { "mirror-del", 0, 1, "[NAME]",
> > +      nbctl_pre_mirror_del, nbctl_mirror_del, NULL, "", RW },
> > +    { "mirror-list", 0, 0, "", nbctl_pre_mirror_list, nbctl_mirror_list,
> > +      NULL, "", RO },
> > +
> >      /* meter commands. */
> >      { "meter-add", 4, 5, "NAME ACTION RATE UNIT [BURST]",
> nbctl_pre_meter_add,
> >        nbctl_meter_add, NULL, "--fair,--may-exist", RW },
> > @@ -7388,6 +7741,10 @@ static const struct ctl_command_syntax
> nbctl_commands[] = {
> >        nbctl_lsp_get_dhcpv6_options, NULL, "", RO },
> >      { "lsp-get-ls", 1, 1, "PORT", nbctl_pre_lsp_get_ls,
> nbctl_lsp_get_ls,
> >        NULL, "", RO },
> > +    { "lsp-attach-mirror", 2, 2, "PORT MIRROR", nbctl_pre_lsp_mirror,
> > +      nbctl_lsp_attach_mirror, NULL, "", RW },
> > +    { "lsp-detach-mirror", 2, 2, "PORT MIRROR", nbctl_pre_lsp_mirror,
> > +      nbctl_lsp_detach_mirror, NULL, "", RW },
> >
> >      /* forwarding group commands. */
> >      { "fwd-group-add", 4, INT_MAX, "SWITCH GROUP VIP VMAC PORT...",
> > diff --git a/utilities/ovn-sbctl.c b/utilities/ovn-sbctl.c
> > index f60dde1b6..3d73e9e25 100644
> > --- a/utilities/ovn-sbctl.c
> > +++ b/utilities/ovn-sbctl.c
> > @@ -307,6 +307,7 @@ pre_get_info(struct ctl_context *ctx)
> >      ovsdb_idl_add_column(ctx->idl, &sbrec_port_binding_col_chassis);
> >      ovsdb_idl_add_column(ctx->idl, &sbrec_port_binding_col_datapath);
> >      ovsdb_idl_add_column(ctx->idl, &sbrec_port_binding_col_up);
> > +    ovsdb_idl_add_column(ctx->idl,
> &sbrec_port_binding_col_mirror_rules);
> >
> >      ovsdb_idl_add_column(ctx->idl,
> &sbrec_logical_flow_col_logical_datapath);
> >      ovsdb_idl_add_column(ctx->idl,
> &sbrec_logical_flow_col_logical_dp_group);
> > @@ -1431,6 +1432,9 @@ static const struct ctl_table_class
> tables[SBREC_N_TABLES] = {
> >      [SBREC_TABLE_HA_CHASSIS_GROUP].row_ids[0]
> >      = {&sbrec_ha_chassis_group_col_name, NULL, NULL},
> >
> > +    [SBREC_TABLE_MIRROR].row_ids[0]
> > +    = {&sbrec_mirror_col_name, NULL, NULL},
> > +
> >      [SBREC_TABLE_METER].row_ids[0]
> >      = {&sbrec_meter_col_name, NULL, NULL},
> >
> > --
> > 2.31.1
> >
>
>
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