On Tue, Mar 22, 2016 at 6:17 PM, Han Zhou <[email protected]> wrote: > > > > On Fri, Mar 11, 2016 at 1:06 PM, Ryan Moats <[email protected]> wrote: > > > > From: RYAN D. MOATS <[email protected]> > > > > This code changes lflow_run to do incremental process of the > > logical flow table rather than processing the full table each run. > > > > Signed-off-by: RYAN D. MOATS <[email protected]> > > --- > > ovn/controller/binding.c | 3 ++ > > ovn/controller/lflow.c | 53 +++++++++++++++++++++++++++++++++------ > > ovn/controller/lflow.h | 4 +- > > ovn/controller/ofctrl.c | 4 +- > > ovn/controller/ofctrl.h | 2 + > > ovn/controller/ovn-controller.c | 5 +++- > > 6 files changed, 58 insertions(+), 13 deletions(-) > > > > diff --git a/ovn/controller/binding.c b/ovn/controller/binding.c > > index 602a8fe..87cae99 100644 > > --- a/ovn/controller/binding.c > > +++ b/ovn/controller/binding.c > > @@ -15,6 +15,7 @@ > > > > #include <config.h> > > #include "binding.h" > > +#include "lflow.h" > > > > #include "lib/bitmap.h" > > #include "lib/hmap.h" > > @@ -139,6 +140,7 @@ remove_local_datapath(struct hmap *local_datapaths, unsigned int ins_seqno) > > if (ld) { > > hmap_remove(local_datapaths, &ld->hmap_node); > > hmap_remove(&local_datapaths_by_seqno, &ld->seqno_hmap_node); > > + reset_flow_processing(); > > } > > } > > > > @@ -156,6 +158,7 @@ add_local_datapath(struct hmap *local_datapaths, > > hmap_insert(local_datapaths, &ld->hmap_node, > > binding_rec->datapath->tunnel_key); > > hmap_insert(&local_datapaths_by_seqno, &ld->seqno_hmap_node, ins_seqno); > > + reset_flow_processing(); > > } > > > > static void > > diff --git a/ovn/controller/lflow.c b/ovn/controller/lflow.c > > index 4856362..6d0d417 100644 > > --- a/ovn/controller/lflow.c > > +++ b/ovn/controller/lflow.c > > @@ -176,6 +176,20 @@ struct logical_datapath { > > enum ldp_type type; /* Type of logical datapath */ > > }; > > > > +void reset_flow_processing(void); > > +void ldp_port_create(uint32_t ins_seqno, char *name, > > + struct logical_datapath *ldp); > > +void ldp_port_update(uint32_t ins_seqno, char *name, > > + struct logical_datapath *ldp); > > + > > +bool restart_flow_processing = false; > > + > > +void > > +reset_flow_processing(void) > > +{ > > + restart_flow_processing = true; > > +} > > + > > /* Contains "struct logical_datapath"s. */ > > static struct hmap logical_datapaths = HMAP_INITIALIZER(&logical_datapaths); > > > > @@ -208,6 +222,7 @@ ldp_create(const struct sbrec_datapath_binding *binding) > > const char *ls = smap_get(&binding->external_ids, "logical-switch"); > > ldp->type = ls ? LDP_TYPE_SWITCH : LDP_TYPE_ROUTER; > > simap_init(&ldp->ports); > > + reset_flow_processing(); > > return ldp; > > } > > > > @@ -224,6 +239,7 @@ ldp_free(struct logical_datapath *ldp) > > simap_destroy(&ldp->ports); > > hmap_remove(&logical_datapaths, &ldp->hmap_node); > > free(ldp); > > + reset_flow_processing(); > > } > > > > /* Whether a particular port has been seen or not > > @@ -319,6 +335,7 @@ ldp_run(struct controller_ctx *ctx) > > binding->logical_port); > > if (!old || old->data != binding->tunnel_key) { > > simap_put(&ldp->ports, binding->logical_port, binding->tunnel_key); > > + reset_flow_processing(); > > } > > > > ldp_port_update(ins_seqno, binding->logical_port, ldp); > > @@ -380,13 +397,21 @@ lflow_init(void) > > > > /* Translates logical flows in the Logical_Flow table in the OVN_SB database > > * into OpenFlow flows. See ovn-architecture(7) for more information. */ > > -void > > +unsigned int > > lflow_run(struct controller_ctx *ctx, > > const struct simap *ct_zones, > > - struct hmap *local_datapaths) > > + struct hmap *local_datapaths, > > + unsigned int seqno) > > { > > struct hmap flows = HMAP_INITIALIZER(&flows); > > uint32_t conj_id_ofs = 1; > > + unsigned int processed_seqno = seqno; > > + > > + if (restart_flow_processing) { > > + seqno = 0; > > + ovn_flow_table_clear(); > > + restart_flow_processing = false; > > + } > > > > ldp_run(ctx); > > > > @@ -398,17 +423,29 @@ lflow_run(struct controller_ctx *ctx, > > OVSDB_IDL_CHANGE_MODIFY); > > unsigned int ins_seqno = sbrec_logical_flow_row_get_seqno(lflow, > > OVSDB_IDL_CHANGE_INSERT); > > - // this offset is to protect the hard coded rules in physical.c > > - ins_seqno += 4; > > - > > + if (del_seqno <= seqno && mod_seqno <= seqno && ins_seqno <= seqno) { > > + continue; > > + } > > /* if the row has a del_seqno > 0, then trying to process the > > * row isn't going to work (as it has already been freed). > > - * Therefore all we can do is to pass the ins_seqno to > > + * Therefore all we can do is to pass the offset ins_seqno to > > * ofctrl_remove_flow() to remove the flow */ > > if (del_seqno > 0) { > > - ofctrl_remove_flow(ins_seqno); > > + ofctrl_remove_flow(ins_seqno+4); > > + if (del_seqno > processed_seqno) { > > + processed_seqno = del_seqno; > > + } > > continue; > > } > > + if (mod_seqno > processed_seqno) { > > + processed_seqno = mod_seqno; > > + } > > + if (ins_seqno > processed_seqno) { > > + processed_seqno = ins_seqno; > > + } > > + > > + // this offset is to protect the hard coded rules in physical.c > > + ins_seqno += 4; > > > > /* Find the "struct logical_datapath" associated with this > > * Logical_Flow row. If there's no such struct, that must be because > > @@ -544,12 +581,12 @@ lflow_run(struct controller_ctx *ctx, > > ofpbuf_uninit(&conj); > > } > > } > > - > > /* Clean up. */ > > expr_matches_destroy(&matches); > > ofpbuf_uninit(&ofpacts); > > conj_id_ofs += n_conjs; > > } > > + return processed_seqno; > > } > > > > void > > diff --git a/ovn/controller/lflow.h b/ovn/controller/lflow.h > > index e0e902c..31b187a 100644 > > --- a/ovn/controller/lflow.h > > +++ b/ovn/controller/lflow.h > > @@ -56,8 +56,8 @@ struct uuid; > > #define LOG_PIPELINE_LEN 16 > > > > void lflow_init(void); > > -void lflow_run(struct controller_ctx *, const struct simap *ct_zones, > > - struct hmap *local_datapaths); > > +unsigned int lflow_run(struct controller_ctx *, const struct simap *ct_zones, > > + struct hmap *local_datapaths, unsigned int seqno); > > void lflow_destroy(void); > > > > #endif /* ovn/lflow.h */ > > diff --git a/ovn/controller/ofctrl.c b/ovn/controller/ofctrl.c > > index 2479ca1..5aa7044 100644 > > --- a/ovn/controller/ofctrl.c > > +++ b/ovn/controller/ofctrl.c > > @@ -106,7 +106,7 @@ static struct hmap installed_flows; > > * S_CLEAR_FLOWS or S_UPDATE_FLOWS, this is really the option we have. */ > > static enum mf_field_id mff_ovn_geneve; > > > > -static void ovn_flow_table_clear(void); > > +void ovn_flow_table_clear(void); > > static void ovn_flow_table_destroy(void); > > > > static void ofctrl_recv(const struct ofp_header *, enum ofptype); > > @@ -728,7 +728,7 @@ ovn_flow_destroy(struct ovn_flow *f) > > > > /* Flow tables of struct ovn_flow. */ > > > > -static void > > +void > > ovn_flow_table_clear(void) > > { > > struct ovn_flow *f, *next; > > diff --git a/ovn/controller/ofctrl.h b/ovn/controller/ofctrl.h > > index 4ae0d42..ff870e6 100644 > > --- a/ovn/controller/ofctrl.h > > +++ b/ovn/controller/ofctrl.h > > @@ -43,4 +43,6 @@ void ofctrl_add_flow(uint8_t table_id, uint16_t priority, > > > > void ofctrl_remove_flow(unsigned int ins_seqno); > > > > +void ovn_flow_table_clear(void); > > + > > #endif /* ovn/ofctrl.h */ > > diff --git a/ovn/controller/ovn-controller.c b/ovn/controller/ovn-controller.c > > index cb8536b..258d83e 100644 > > --- a/ovn/controller/ovn-controller.c > > +++ b/ovn/controller/ovn-controller.c > > @@ -208,6 +208,7 @@ main(int argc, char *argv[]) > > struct unixctl_server *unixctl; > > bool exiting; > > int retval; > > + unsigned int ovnsb_last_lflow_seqno = 0; > > > > ovs_cmdl_proctitle_init(argc, argv); > > set_program_name(argv[0]); > > @@ -303,7 +304,9 @@ main(int argc, char *argv[]) > > > > pinctrl_run(&ctx, br_int); > > > > - lflow_run(&ctx, &ct_zones, &local_datapaths); > > + ovnsb_last_lflow_seqno = lflow_run(&ctx, &ct_zones, > > + &local_datapaths, > > + ovnsb_last_lflow_seqno); > > if (chassis_id) { > > physical_run(&ctx, mff_ovn_geneve, > > br_int, chassis_id, &ct_zones, > > -- > > 1.7.1 > > > > _______________________________________________ > > dev mailing list > > [email protected] > > http://openvswitch.org/mailman/listinfo/dev > > I just realized a problem here. We have an optimization already in lflow_run to process egress flows only if it belongs to local-datapath, which was added by Russell some time ago. > > With incremental lflow_run this can be a problem. Considering below scenario: > > - HV-1 has lports for lswitch-A, so local-datapath contains only lswitch-A > - Egress lflows for lswtich-B is added in SB, but ignored by HV-1 because lswitch-B is not local. > - A lport of lswitch-B attached to HV-1. Now lswitch-B becomes local for HV-1. But there is no egress lflow updates for lswitch-B, so HV-1 still will not generate physical flows for those egress lflows of lswitch-B, because of the incremental processing logic. > > I don't think we should drop the local-datapath optimization. So the only way I am thinking right now is to mark the lflows that we ignored, and when a new lswitch becomes local, we need to recheck those lflows to see if it belong to the newly added local-datapath. Any better ideas? > Marking the lflows that we ignored requires maintaining a lflow cache. A simpler (but less optimized) approach would be resetting the seqno when a new datapath is added to local_datapath so that we can fall back to reprocess all lflows. This is just the idea, but I haven't worked out all details. Ryan, what do you think?
-- Best regards, Han _______________________________________________ dev mailing list [email protected] http://openvswitch.org/mailman/listinfo/dev
