On Thu, Mar 16, 2017 at 03:23:38PM -0700, Ben Pfaff wrote:
> On Wed, Mar 01, 2017 at 05:47:59PM -0500, Eric Garver wrote:
> > Flow key handling changes:
> > - Add VLAN header array in struct flow, to record multiple 802.1q VLAN
> > headers.
> > - Add dpif multi-VLAN capability probing. If datapath supports
> > multi-VLAN, increase the maximum depth of nested OVS_KEY_ATTR_ENCAP.
> >
> > Refactor VLAN handling in dpif-xlate:
> > - Introduce 'xvlan' to track VLAN stack during flow processing.
> > - Input and output VLAN translation according to the xbundle type.
> >
> > Push VLAN action support:
> > - Allow ethertype 0x88a8 in VLAN headers and push_vlan action.
> > - Support push_vlan on dot1q packets.
> >
> > Use other_config:vlan-limit in table Open_vSwitch to limit maximum VLANs
> > that can be matched. This allows us to preserve backwards compatibility.
> >
> > Add test cases for VLAN depth limit, Multi-VLAN actions and QinQ VLAN
> > handling
> >
> > Co-authored-by: Thomas F Herbert <[email protected]>
> > Signed-off-by: Thomas F Herbert <[email protected]>
> > Co-authored-by: Xiao Liang <[email protected]>
> > Signed-off-by: Xiao Liang <[email protected]>
> > Signed-off-by: Eric Garver <[email protected]>
>
> Thanks for all the iteration on this patch.
>
> I've folded in the following incremental and applied this to master.
Great! Thanks for the feedback and clean ups.
Do you intend to take the tests as well? The macro OVS_CHECK_8021AD()
probably needs adjusted due the incremental below.
The dot1q-tunnel patches should stand on their own and can be re-spun if
needed.
>
> Some reasoning for my changes:
>
> - I changed the ROUND_UP in struct flow to a build assertion that
> FLOW_MAX_VLAN_HEADERS is a multiple of 2 because we have a fair
> number of cases where we memcpy an array of FLOW_MAX_VLAN_HEADERS
> elements to or from vlans[]. That was going to be risky if we ever
> used "sizeof" on the vlans[] member and FLOW_MAX_VLAN_HEADERS was
> not a multiple of 2, because it would copy too many bytes. So, on
> balance, it seemed safer this way.
Understood. Thanks for the cleanup.
> (Maybe we should do the same thing for mpls_lse.)
>
> - Some style improvements, mostly related to ?: and to moving variable
> declarations closer to first use.
>
> - I reverted the change to vswitch.ovsschema since it only updated the
> version without any other changes.
I think that was remnant of when the dot1q-tunnel was part of this
patch. I guess I missed that when I split them.
> - I made the documentation more explicit.
>
> It seems that I made a few other minor changes while I was fixing up
> rebase conflicts, most notably making the NEWS item shorter. Those
> aren't in the diff below (sorry about that).
>
> --8<--------------------------cut here-------------------------->8--
>
> diff --git a/include/openvswitch/flow.h b/include/openvswitch/flow.h
> index e7622af8f4ae..188467dc42d5 100644
> --- a/include/openvswitch/flow.h
> +++ b/include/openvswitch/flow.h
> @@ -23,7 +23,7 @@
> /* This sequence number should be incremented whenever anything involving
> flows
> * or the wildcarding of flows changes. This will cause build assertion
> * failures in places which likely need to be updated. */
> -#define FLOW_WC_SEQ 37
> +#define FLOW_WC_SEQ 38
>
> /* Number of Open vSwitch extension 32-bit registers. */
> #define FLOW_N_REGS 16
> @@ -64,8 +64,12 @@ const char *flow_tun_flag_to_string(uint32_t flags);
> /* Maximum number of supported SAMPLE action nesting. */
> #define FLOW_MAX_SAMPLE_NESTING 10
>
> -/* Maximum number of supported VLAN headers. */
> +/* Maximum number of supported VLAN headers.
> + *
> + * We require this to be a multiple of 2 so that vlans[] in struct flow is a
> + * multiple of 64 bits. */
> #define FLOW_MAX_VLAN_HEADERS 2
> +BUILD_ASSERT_DECL(FLOW_MAX_VLAN_HEADERS % 2 == 0);
>
> /* Legacy maximum VLAN headers */
> #define LEGACY_MAX_VLAN_HEADERS 1
> @@ -114,7 +118,7 @@ struct flow {
> struct eth_addr dl_src; /* Ethernet source address. */
> ovs_be16 dl_type; /* Ethernet frame type. */
> uint8_t pad2[2]; /* Pad to 64 bits. */
> - union flow_vlan_hdr vlans[ROUND_UP(FLOW_MAX_VLAN_HEADERS, 2)]; /* VLANs
> */
> + union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS]; /* VLANs */
> ovs_be32 mpls_lse[ROUND_UP(FLOW_MAX_MPLS_LABELS, 2)]; /* MPLS label stack
> (with padding).
> */
> /* L3 (64-bit aligned) */
> @@ -154,7 +158,7 @@ BUILD_ASSERT_DECL(sizeof(struct flow_tnl) %
> sizeof(uint64_t) == 0);
> /* Remember to update FLOW_WC_SEQ when changing 'struct flow'. */
> BUILD_ASSERT_DECL(offsetof(struct flow, igmp_group_ip4) + sizeof(uint32_t)
> == sizeof(struct flow_tnl) + 300
> - && FLOW_WC_SEQ == 37);
> + && FLOW_WC_SEQ == 38);
>
> /* Incremental points at which flow classification may be performed in
> * segments.
> diff --git a/lib/flow.c b/lib/flow.c
> index 35693f830e45..f628526657de 100644
> --- a/lib/flow.c
> +++ b/lib/flow.c
> @@ -125,7 +125,7 @@ struct mf_ctx {
> * away. Some GCC versions gave warnings on ALWAYS_INLINE, so these are
> * defined as macros. */
>
> -#if (FLOW_WC_SEQ != 37)
> +#if (FLOW_WC_SEQ != 38)
> #define MINIFLOW_ASSERT(X) ovs_assert(X)
> BUILD_MESSAGE("FLOW_WC_SEQ changed: miniflow_extract() will have runtime "
> "assertions enabled. Consider updating FLOW_WC_SEQ after "
> @@ -337,7 +337,6 @@ parse_mpls(const void **datap, size_t *sizep)
> static inline ALWAYS_INLINE size_t
> parse_vlan(const void **datap, size_t *sizep, union flow_vlan_hdr *vlan_hdrs)
> {
> - size_t encaps;
> const ovs_be16 *eth_type;
>
> memset(vlan_hdrs, 0, sizeof(union flow_vlan_hdr) *
> FLOW_MAX_VLAN_HEADERS);
> @@ -345,20 +344,18 @@ parse_vlan(const void **datap, size_t *sizep, union
> flow_vlan_hdr *vlan_hdrs)
>
> eth_type = *datap;
>
> - for (encaps = 0;
> - eth_type_vlan(*eth_type) && encaps < flow_vlan_limit;
> - encaps++) {
> - const ovs_16aligned_be32 *qp;
> -
> + size_t n;
> + for (n = 0; eth_type_vlan(*eth_type) && n < flow_vlan_limit; n++) {
> if (OVS_UNLIKELY(*sizep < sizeof(ovs_be32) + sizeof(ovs_be16))) {
> break;
> }
> - qp = data_pull(datap, sizep, sizeof *qp);
> - vlan_hdrs[encaps].qtag = get_16aligned_be32(qp);
> - vlan_hdrs[encaps].tci |= htons(VLAN_CFI);
> +
> + const ovs_16aligned_be32 *qp = data_pull(datap, sizep, sizeof *qp);
> + vlan_hdrs[n].qtag = get_16aligned_be32(qp);
> + vlan_hdrs[n].tci |= htons(VLAN_CFI);
> eth_type = *datap;
> }
> - return encaps;
> + return n;
> }
>
> static inline ALWAYS_INLINE ovs_be16
> @@ -636,14 +633,14 @@ miniflow_extract(struct dp_packet *packet, struct
> miniflow *dst)
> if (OVS_UNLIKELY(size < sizeof(struct eth_header))) {
> goto out;
> } else {
> - union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS];
> - size_t num_vlans;
> -
> /* Link layer. */
> ASSERT_SEQUENTIAL(dl_dst, dl_src);
> miniflow_push_macs(mf, dl_dst, data);
> +
> /* VLAN */
> - num_vlans = parse_vlan(&data, &size, vlans);
> + union flow_vlan_hdr vlans[FLOW_MAX_VLAN_HEADERS];
> + size_t num_vlans = parse_vlan(&data, &size, vlans);
> +
> /* dl_type */
> dl_type = parse_ethertype(&data, &size);
> miniflow_push_be16(mf, dl_type, dl_type);
> @@ -930,7 +927,7 @@ flow_get_metadata(const struct flow *flow, struct match
> *flow_metadata)
> {
> int i;
>
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> match_init_catchall(flow_metadata);
> if (flow->tunnel.tun_id != htonll(0)) {
> @@ -1357,13 +1354,14 @@ flow_wildcards_init_catchall(struct flow_wildcards
> *wc)
> * the packet headers extracted to 'flow'. It will not set the mask for
> fields
> * that do not make sense for the packet type. OpenFlow-only metadata is
> * wildcarded, but other metadata is unconditionally exact-matched. */
> -void flow_wildcards_init_for_packet(struct flow_wildcards *wc,
> - const struct flow *flow)
> +void
> +flow_wildcards_init_for_packet(struct flow_wildcards *wc,
> + const struct flow *flow)
> {
> memset(&wc->masks, 0x0, sizeof wc->masks);
>
> /* Update this function whenever struct flow changes. */
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> if (flow_tnl_dst_is_set(&flow->tunnel)) {
> if (flow->tunnel.flags & FLOW_TNL_F_KEY) {
> @@ -1498,7 +1496,7 @@ void
> flow_wc_map(const struct flow *flow, struct flowmap *map)
> {
> /* Update this function whenever struct flow changes. */
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> flowmap_init(map);
>
> @@ -1592,7 +1590,7 @@ void
> flow_wildcards_clear_non_packet_fields(struct flow_wildcards *wc)
> {
> /* Update this function whenever struct flow changes. */
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> memset(&wc->masks.metadata, 0, sizeof wc->masks.metadata);
> memset(&wc->masks.regs, 0, sizeof wc->masks.regs);
> @@ -1736,7 +1734,7 @@ flow_wildcards_set_xxreg_mask(struct flow_wildcards
> *wc, int idx,
> uint32_t
> miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis)
> {
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
> uint32_t hash = basis;
>
> if (flow) {
> @@ -1783,7 +1781,7 @@ ASSERT_SEQUENTIAL(ipv6_src, ipv6_dst);
> uint32_t
> flow_hash_5tuple(const struct flow *flow, uint32_t basis)
> {
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
> uint32_t hash = basis;
>
> if (flow) {
> @@ -1919,9 +1917,9 @@ flow_random_hash_fields(struct flow *flow)
> eth_addr_random(&flow->dl_dst);
>
> for (i = 0; i < FLOW_MAX_VLAN_HEADERS; i++) {
> + uint16_t vlan = random_uint16() & VLAN_VID_MASK;
> flow->vlans[i].tpid = htons(ETH_TYPE_VLAN_8021Q);
> - flow->vlans[i].tci = htons((random_uint16() & VLAN_VID_MASK) |
> - VLAN_CFI);
> + flow->vlans[i].tci = htons(vlan | VLAN_CFI);
> }
>
> /* Make most of the random flows IPv4, some IPv6, and rest random. */
> @@ -2184,8 +2182,8 @@ flow_pop_vlan(struct flow *flow, struct flow_wildcards
> *wc)
> void
> flow_push_vlan_uninit(struct flow *flow, struct flow_wildcards *wc)
> {
> - int n = flow_count_vlan_headers(flow);
> if (wc) {
> + int n = flow_count_vlan_headers(flow);
> memset(wc->masks.vlans, 0xff, sizeof(union flow_vlan_hdr) * n);
> }
> memmove(&flow->vlans[1], &flow->vlans[0],
> @@ -2331,7 +2329,7 @@ flow_push_mpls(struct flow *flow, int n, ovs_be16
> mpls_eth_type,
>
> if (clear_flow_L3) {
> /* Clear all L3 and L4 fields and dp_hash. */
> - BUILD_ASSERT(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT(FLOW_WC_SEQ == 38);
> memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0,
> sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT);
> flow->dp_hash = 0;
> @@ -2552,7 +2550,6 @@ flow_compose(struct dp_packet *p, const struct flow
> *flow)
> {
> uint32_t pseudo_hdr_csum;
> size_t l4_len;
> - int encaps;
>
> /* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */
> eth_compose(p, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0);
> @@ -2562,7 +2559,7 @@ flow_compose(struct dp_packet *p, const struct flow
> *flow)
> return;
> }
>
> - for (encaps = FLOW_MAX_VLAN_HEADERS - 1; encaps >= 0; encaps--) {
> + for (int encaps = FLOW_MAX_VLAN_HEADERS - 1; encaps >= 0; encaps--) {
> if (flow->vlans[encaps].tci & htons(VLAN_CFI)) {
> eth_push_vlan(p, flow->vlans[encaps].tpid,
> flow->vlans[encaps].tci);
> @@ -2893,7 +2890,7 @@ flow_limit_vlans(int vlan_limit)
> {
> if (vlan_limit <= 0) {
> flow_vlan_limit = FLOW_MAX_VLAN_HEADERS;
> - } else if (vlan_limit > 0) {
> + } else {
> flow_vlan_limit = MIN(vlan_limit, FLOW_MAX_VLAN_HEADERS);
> }
> }
> diff --git a/lib/flow.h b/lib/flow.h
> index 2047fe872961..86b52584b1de 100644
> --- a/lib/flow.h
> +++ b/lib/flow.h
> @@ -905,7 +905,7 @@ static inline void
> pkt_metadata_from_flow(struct pkt_metadata *md, const struct flow *flow)
> {
> /* Update this function whenever struct flow changes. */
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> md->recirc_id = flow->recirc_id;
> md->dp_hash = flow->dp_hash;
> diff --git a/lib/match.c b/lib/match.c
> index 5440fc6e8fa2..4a8db187b72e 100644
> --- a/lib/match.c
> +++ b/lib/match.c
> @@ -1169,7 +1169,7 @@ match_format(const struct match *match, struct ds *s,
> int priority)
>
> int i;
>
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> if (priority != OFP_DEFAULT_PRIORITY) {
> ds_put_format(s, "%spriority=%s%d,",
> diff --git a/lib/nx-match.c b/lib/nx-match.c
> index 6a27e57a841a..8fcae977cfa1 100644
> --- a/lib/nx-match.c
> +++ b/lib/nx-match.c
> @@ -986,7 +986,7 @@ nx_put_raw(struct ofpbuf *b, enum ofp_version oxm, const
> struct match *match,
> int match_len;
> int i;
>
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> /* Metadata. */
> if (match->wc.masks.dp_hash) {
> diff --git a/lib/odp-util.c b/lib/odp-util.c
> index 4a1b6915792f..a7b14ed720f9 100644
> --- a/lib/odp-util.c
> +++ b/lib/odp-util.c
> @@ -4424,7 +4424,6 @@ odp_flow_key_from_flow__(const struct
> odp_flow_key_parms *parms,
> {
> struct ovs_key_ethernet *eth_key;
> size_t encap[FLOW_MAX_VLAN_HEADERS] = {0};
> - int encaps = 0;
> size_t max_vlans;
> const struct flow *flow = parms->flow;
> const struct flow *data = export_mask ? parms->mask : parms->flow;
> @@ -4495,7 +4494,7 @@ odp_flow_key_from_flow__(const struct
> odp_flow_key_parms *parms,
> } else {
> max_vlans = MIN(parms->support.max_vlan_headers, flow_vlan_limit);
> }
> - for (encaps = 0; encaps < max_vlans; encaps++) {
> + for (int encaps = 0; encaps < max_vlans; encaps++) {
> ovs_be16 tpid = flow->vlans[encaps].tpid;
>
> if (flow->vlans[encaps].tci == htons(0)) {
> @@ -4636,7 +4635,7 @@ odp_flow_key_from_flow__(const struct
> odp_flow_key_parms *parms,
> }
>
> unencap:
> - for (encaps = max_vlans-1; encaps >= 0; encaps--) {
> + for (int encaps = max_vlans - 1; encaps >= 0; encaps--) {
> if (encap[encaps]) {
> nl_msg_end_nested(buf, encap[encaps]);
> }
> @@ -5239,12 +5238,12 @@ parse_8021q_onward(const struct nlattr
> *attrs[OVS_KEY_ATTR_MAX + 1],
> int encaps = 0;
>
> while (encaps < flow_vlan_limit &&
> - (is_mask ?
> - (src_flow->vlans[encaps].tci & htons(VLAN_CFI)) != 0 :
> - eth_type_vlan(flow->dl_type))) {
> + (is_mask
> + ? (src_flow->vlans[encaps].tci & htons(VLAN_CFI)) != 0
> + : eth_type_vlan(flow->dl_type))) {
>
> encap = (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_ENCAP)
> - ? attrs[OVS_KEY_ATTR_ENCAP] : NULL);
> + ? attrs[OVS_KEY_ATTR_ENCAP] : NULL);
>
> /* Calculate fitness of outer attributes. */
> if (!is_mask) {
> @@ -5700,10 +5699,8 @@ static void
> commit_vlan_action(const struct flow* flow, struct flow *base,
> struct ofpbuf *odp_actions, struct flow_wildcards *wc)
> {
> - int flow_n, base_n;
> -
> - base_n = flow_count_vlan_headers(base);
> - flow_n = flow_count_vlan_headers(flow);
> + int base_n = flow_count_vlan_headers(base);
> + int flow_n = flow_count_vlan_headers(flow);
> flow_skip_common_vlan_headers(base, &base_n, flow, &flow_n);
>
> /* Pop all mismatching vlan of base, push those of flow */
> diff --git a/lib/odp-util.h b/lib/odp-util.h
> index dc0fef177fd7..50fa1d133e1f 100644
> --- a/lib/odp-util.h
> +++ b/lib/odp-util.h
> @@ -143,7 +143,7 @@ void odp_portno_names_destroy(struct hmap *portno_names);
> * add another field and forget to adjust this value.
> */
> #define ODPUTIL_FLOW_KEY_BYTES 640
> -BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> +BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> /* A buffer with sufficient size and alignment to hold an nlattr-formatted
> flow
> * key. An array of "struct nlattr" might not, in theory, be sufficiently
> diff --git a/lib/ofp-util.c b/lib/ofp-util.c
> index 5ee47ebb2970..02ee95fadb20 100644
> --- a/lib/ofp-util.c
> +++ b/lib/ofp-util.c
> @@ -101,7 +101,7 @@ ofputil_netmask_to_wcbits(ovs_be32 netmask)
> void
> ofputil_wildcard_from_ofpfw10(uint32_t ofpfw, struct flow_wildcards *wc)
> {
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> /* Initialize most of wc. */
> flow_wildcards_init_catchall(wc);
> diff --git a/ofproto/ofproto-dpif-rid.h b/ofproto/ofproto-dpif-rid.h
> index dfe54ff3296f..2c05c36077d6 100644
> --- a/ofproto/ofproto-dpif-rid.h
> +++ b/ofproto/ofproto-dpif-rid.h
> @@ -99,7 +99,7 @@ struct rule;
> /* Metadata for restoring pipeline context after recirculation. Helpers
> * are inlined below to keep them together with the definition for easier
> * updates. */
> -BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> +BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
>
> struct frozen_metadata {
> /* Metadata in struct flow. */
> diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
> index 19e81543ef49..940ed269af4b 100644
> --- a/ofproto/ofproto-dpif-xlate.c
> +++ b/ofproto/ofproto-dpif-xlate.c
> @@ -3206,7 +3206,7 @@ compose_output_action__(struct xlate_ctx *ctx,
> ofp_port_t ofp_port,
> struct flow_wildcards *wc = ctx->wc;
> struct flow *flow = &ctx->xin->flow;
> struct flow_tnl flow_tnl;
> - ovs_be16 flow_vlan_tci;
> + union flow_vlan_hdr flow_vlans[FLOW_MAX_VLAN_HEADERS];
> uint32_t flow_pkt_mark;
> uint8_t flow_nw_tos;
> odp_port_t out_port, odp_port;
> @@ -3215,7 +3215,7 @@ compose_output_action__(struct xlate_ctx *ctx,
> ofp_port_t ofp_port,
>
> /* If 'struct flow' gets additional metadata, we'll need to zero it out
> * before traversing a patch port. */
> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 37);
> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 38);
> memset(&flow_tnl, 0, sizeof flow_tnl);
>
> if (!xport) {
> @@ -3401,7 +3401,7 @@ compose_output_action__(struct xlate_ctx *ctx,
> ofp_port_t ofp_port,
> return;
> }
>
> - flow_vlan_tci = flow->vlans[0].tci;
> + memcpy(flow_vlans, flow->vlans, sizeof flow_vlans);
> flow_pkt_mark = flow->pkt_mark;
> flow_nw_tos = flow->nw_tos;
>
> @@ -3529,7 +3529,7 @@ compose_output_action__(struct xlate_ctx *ctx,
> ofp_port_t ofp_port,
>
> out:
> /* Restore flow */
> - flow->vlans[0].tci = flow_vlan_tci;
> + memcpy(flow->vlans, flow_vlans, sizeof flow->vlans);
> flow->pkt_mark = flow_pkt_mark;
> flow->nw_tos = flow_nw_tos;
> }
> diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
> index 1af0bded4089..1c4c80469d0c 100644
> --- a/ofproto/ofproto-dpif.c
> +++ b/ofproto/ofproto-dpif.c
> @@ -974,12 +974,12 @@ check_max_vlan_headers(struct dpif_backer *backer)
>
> ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
> odp_flow_key_from_flow(&odp_parms, &key);
> - if (!dpif_probe_feature(backer->dpif, "VLAN", &key, NULL)) {
> + if (!dpif_probe_feature(backer->dpif, "VLAN", &key, NULL, NULL)) {
> break;
> }
> }
>
> - VLOG_INFO("%s: VLAN label stack length probed as %d",
> + VLOG_INFO("%s: VLAN header stack length probed as %d",
> dpif_name(backer->dpif), n);
> return n;
> }
> diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
> index 2a85c0f8c763..09594f1010e1 100644
> --- a/ofproto/ofproto.c
> +++ b/ofproto/ofproto.c
> @@ -8616,4 +8616,3 @@ ofproto_set_vlan_limit(int vlan_limit)
> {
> flow_limit_vlans(vlan_limit);
> }
> -
> diff --git a/tests/test-classifier.c b/tests/test-classifier.c
> index 774a9be22f89..37baad2a4bab 100644
> --- a/tests/test-classifier.c
> +++ b/tests/test-classifier.c
> @@ -58,7 +58,7 @@ static bool versioned = false;
> CLS_FIELD(nw_src, NW_SRC) \
> CLS_FIELD(nw_dst, NW_DST) \
> CLS_FIELD(in_port.ofp_port, IN_PORT) \
> - CLS_FIELD(vlans[0].tci, VLAN_TCI) \
> + CLS_FIELD(vlans[0].tci, VLAN_TCI) \
> CLS_FIELD(dl_type, DL_TYPE) \
> CLS_FIELD(tp_src, TP_SRC) \
> CLS_FIELD(tp_dst, TP_DST) \
> diff --git a/vswitchd/vswitch.ovsschema b/vswitchd/vswitch.ovsschema
> index de78dfd26d2c..b04d360d604e 100644
> --- a/vswitchd/vswitch.ovsschema
> +++ b/vswitchd/vswitch.ovsschema
> @@ -1,6 +1,6 @@
> {"name": "Open_vSwitch",
> - "version": "7.15.0",
> - "cksum": "2264024465 22987",
> + "version": "7.14.0",
> + "cksum": "3374030633 22987",
> "tables": {
> "Open_vSwitch": {
> "columns": {
> diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
> index 8ef675f5cc17..464a211ad0f5 100644
> --- a/vswitchd/vswitch.xml
> +++ b/vswitchd/vswitch.xml
> @@ -354,18 +354,23 @@
> <column name="other_config" key="vlan-limit"
> type='{"type": "integer", "minInteger": 0}'>
> <p>
> - Limit the maxmium of VLAN headers that can be matched. Further VLAN
> - headers will be treated as payload, e.g. a packet with more 802.1q
> - headers will match eth_type 0x8100.
> + Limits the number of VLAN headers that can be matched to the
> + specified number. Further VLAN headers will be treated as payload,
> + e.g. a packet with more 802.1q headers will match Ethernet type
> + 0x8100.
> </p>
> <p>
> - Value <code>0</code> means unlimited. The actual value of max VLAN
> - headers is the minumium of <code>vlan-limit</code>, the max VLANs
> - supported by Open vSwitch userspace (currently 2), and that
> supported
> - by datapath.
> + Value <code>0</code> means unlimited. The actual number of
> supported
> + VLAN headers is the smallest of <code>vlan-limit</code>, the number
> + of VLANs supported by Open vSwitch userspace (currently 2), and the
> + number supported by the datapath.
> </p>
> +
> <p>
> - The default value is 1, to keep backward compatibility.
> + If this value is absent, the default is currently 1. This
> maintains
> + backward compatibility with controllers that were designed for use
> + with Open vSwitch versions earlier than 2.8, which only supported
> one
> + VLAN.
> </p>
> </column>
> </group>
This incremental looks good to me.
Thanks again!
Eric.
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