forked from Minki/linux
net/sched: act_ife: Change to use ife module
Use the encode/decode functionality from the ife module instead of using implementation inside the act_ife. Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Yotam Gigi <yotamg@mellanox.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Roman Mashak <mrv@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yotam Gigi
David S. Miller
parent
1ce8460496
commit
295a6e06d2
@ -6,7 +6,6 @@
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#include <linux/rtnetlink.h>
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#include <linux/module.h>
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#define IFE_METAHDRLEN 2
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struct tcf_ife_info {
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struct tc_action common;
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u8 eth_dst[ETH_ALEN];
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@ -3,6 +3,7 @@
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#include <linux/types.h>
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#include <linux/pkt_cls.h>
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#include <linux/ife.h>
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#define TCA_ACT_IFE 25
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/* Flag bits for now just encoding/decoding; mutually exclusive */
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@ -28,13 +29,4 @@ enum {
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};
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#define TCA_IFE_MAX (__TCA_IFE_MAX - 1)
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#define IFE_META_SKBMARK 1
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#define IFE_META_HASHID 2
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#define IFE_META_PRIO 3
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#define IFE_META_QMAP 4
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#define IFE_META_TCINDEX 5
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/*Can be overridden at runtime by module option*/
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#define __IFE_META_MAX 6
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#define IFE_META_MAX (__IFE_META_MAX - 1)
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#endif
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@ -776,6 +776,7 @@ config NET_ACT_SKBMOD
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config NET_ACT_IFE
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tristate "Inter-FE action based on IETF ForCES InterFE LFB"
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depends on NET_CLS_ACT
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select NET_IFE
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---help---
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Say Y here to allow for sourcing and terminating metadata
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For details refer to netdev01 paper:
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@ -32,6 +32,7 @@
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#include <uapi/linux/tc_act/tc_ife.h>
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#include <net/tc_act/tc_ife.h>
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#include <linux/etherdevice.h>
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#include <net/ife.h>
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#define IFE_TAB_MASK 15
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@ -46,23 +47,6 @@ static const struct nla_policy ife_policy[TCA_IFE_MAX + 1] = {
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[TCA_IFE_TYPE] = { .type = NLA_U16},
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};
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/* Caller takes care of presenting data in network order
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*/
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static int ife_tlv_meta_encode(void *skbdata, u16 attrtype, u16 dlen,
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const void *dval)
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{
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u32 *tlv = (u32 *)(skbdata);
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u16 totlen = nla_total_size(dlen); /*alignment + hdr */
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char *dptr = (char *)tlv + NLA_HDRLEN;
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u32 htlv = attrtype << 16 | (dlen + NLA_HDRLEN);
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*tlv = htonl(htlv);
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memset(dptr, 0, totlen - NLA_HDRLEN);
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memcpy(dptr, dval, dlen);
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return totlen;
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}
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int ife_encode_meta_u16(u16 metaval, void *skbdata, struct tcf_meta_info *mi)
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{
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u16 edata = 0;
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@ -637,69 +621,59 @@ int find_decode_metaid(struct sk_buff *skb, struct tcf_ife_info *ife,
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return 0;
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}
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struct ifeheadr {
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__be16 metalen;
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u8 tlv_data[];
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};
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struct meta_tlvhdr {
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__be16 type;
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__be16 len;
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};
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static int tcf_ife_decode(struct sk_buff *skb, const struct tc_action *a,
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struct tcf_result *res)
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{
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struct tcf_ife_info *ife = to_ife(a);
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int action = ife->tcf_action;
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struct ifeheadr *ifehdr = (struct ifeheadr *)skb->data;
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int ifehdrln = (int)ifehdr->metalen;
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struct meta_tlvhdr *tlv = (struct meta_tlvhdr *)(ifehdr->tlv_data);
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u8 *ifehdr_end;
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u8 *tlv_data;
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u16 metalen;
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spin_lock(&ife->tcf_lock);
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bstats_update(&ife->tcf_bstats, skb);
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tcf_lastuse_update(&ife->tcf_tm);
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spin_unlock(&ife->tcf_lock);
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ifehdrln = ntohs(ifehdrln);
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if (unlikely(!pskb_may_pull(skb, ifehdrln))) {
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if (skb_at_tc_ingress(skb))
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skb_push(skb, skb->dev->hard_header_len);
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tlv_data = ife_decode(skb, &metalen);
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if (unlikely(!tlv_data)) {
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spin_lock(&ife->tcf_lock);
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ife->tcf_qstats.drops++;
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spin_unlock(&ife->tcf_lock);
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return TC_ACT_SHOT;
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}
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skb_set_mac_header(skb, ifehdrln);
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__skb_pull(skb, ifehdrln);
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skb->protocol = eth_type_trans(skb, skb->dev);
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ifehdrln -= IFE_METAHDRLEN;
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ifehdr_end = tlv_data + metalen;
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for (; tlv_data < ifehdr_end; tlv_data = ife_tlv_meta_next(tlv_data)) {
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u8 *curr_data;
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u16 mtype;
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u16 dlen;
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while (ifehdrln > 0) {
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u8 *tlvdata = (u8 *)tlv;
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u16 mtype = tlv->type;
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u16 mlen = tlv->len;
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u16 alen;
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curr_data = ife_tlv_meta_decode(tlv_data, &mtype, &dlen, NULL);
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mtype = ntohs(mtype);
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mlen = ntohs(mlen);
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alen = NLA_ALIGN(mlen);
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if (find_decode_metaid(skb, ife, mtype, (mlen - NLA_HDRLEN),
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(void *)(tlvdata + NLA_HDRLEN))) {
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if (find_decode_metaid(skb, ife, mtype, dlen, curr_data)) {
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/* abuse overlimits to count when we receive metadata
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* but dont have an ops for it
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*/
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pr_info_ratelimited("Unknown metaid %d alnlen %d\n",
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mtype, mlen);
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pr_info_ratelimited("Unknown metaid %d dlen %d\n",
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mtype, dlen);
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ife->tcf_qstats.overlimits++;
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}
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tlvdata += alen;
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ifehdrln -= alen;
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tlv = (struct meta_tlvhdr *)tlvdata;
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}
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if (WARN_ON(tlv_data != ifehdr_end)) {
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spin_lock(&ife->tcf_lock);
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ife->tcf_qstats.drops++;
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spin_unlock(&ife->tcf_lock);
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return TC_ACT_SHOT;
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}
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skb->protocol = eth_type_trans(skb, skb->dev);
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skb_reset_network_header(skb);
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return action;
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}
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@ -727,7 +701,6 @@ static int tcf_ife_encode(struct sk_buff *skb, const struct tc_action *a,
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struct tcf_ife_info *ife = to_ife(a);
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int action = ife->tcf_action;
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struct ethhdr *oethh; /* outer ether header */
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struct ethhdr *iethh; /* inner eth header */
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struct tcf_meta_info *e;
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/*
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OUTERHDR:TOTMETALEN:{TLVHDR:Metadatum:TLVHDR..}:ORIGDATA
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@ -735,10 +708,11 @@ static int tcf_ife_encode(struct sk_buff *skb, const struct tc_action *a,
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*/
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u16 metalen = ife_get_sz(skb, ife);
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int hdrm = metalen + skb->dev->hard_header_len + IFE_METAHDRLEN;
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unsigned int skboff = skb->dev->hard_header_len;
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unsigned int skboff = 0;
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int new_len = skb->len + hdrm;
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bool exceed_mtu = false;
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int err;
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void *ife_meta;
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int err = 0;
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if (!skb_at_tc_ingress(skb)) {
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if (new_len > skb->dev->mtu)
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@ -765,27 +739,10 @@ static int tcf_ife_encode(struct sk_buff *skb, const struct tc_action *a,
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return TC_ACT_SHOT;
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}
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err = skb_cow_head(skb, hdrm);
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if (unlikely(err)) {
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ife->tcf_qstats.drops++;
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spin_unlock(&ife->tcf_lock);
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return TC_ACT_SHOT;
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}
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if (skb_at_tc_ingress(skb))
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skb_push(skb, skb->dev->hard_header_len);
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iethh = (struct ethhdr *)skb->data;
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__skb_push(skb, hdrm);
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memcpy(skb->data, iethh, skb->mac_len);
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skb_reset_mac_header(skb);
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oethh = eth_hdr(skb);
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/*total metadata length */
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metalen += IFE_METAHDRLEN;
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metalen = htons(metalen);
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memcpy((skb->data + skboff), &metalen, IFE_METAHDRLEN);
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skboff += IFE_METAHDRLEN;
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ife_meta = ife_encode(skb, metalen);
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/* XXX: we dont have a clever way of telling encode to
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* not repeat some of the computations that are done by
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@ -793,7 +750,7 @@ static int tcf_ife_encode(struct sk_buff *skb, const struct tc_action *a,
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*/
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list_for_each_entry(e, &ife->metalist, metalist) {
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if (e->ops->encode) {
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err = e->ops->encode(skb, (void *)(skb->data + skboff),
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err = e->ops->encode(skb, (void *)(ife_meta + skboff),
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e);
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}
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if (err < 0) {
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@ -804,15 +761,12 @@ static int tcf_ife_encode(struct sk_buff *skb, const struct tc_action *a,
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}
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skboff += err;
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}
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oethh = (struct ethhdr *)skb->data;
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if (!is_zero_ether_addr(ife->eth_src))
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ether_addr_copy(oethh->h_source, ife->eth_src);
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else
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ether_addr_copy(oethh->h_source, iethh->h_source);
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if (!is_zero_ether_addr(ife->eth_dst))
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ether_addr_copy(oethh->h_dest, ife->eth_dst);
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else
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ether_addr_copy(oethh->h_dest, iethh->h_dest);
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oethh->h_proto = htons(ife->eth_type);
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if (skb_at_tc_ingress(skb))
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