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Date: Tue, 20 Aug 2019 12:52:24 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org,
jakub.kicinski@...ronome.com, jiri@...nulli.us, vladbu@...lanox.com
Subject: [PATCH net-next 1/2] net: flow_offload: mangle 128-bit packet field with one action
The existing infrastructure needs the front-end to generate up to four
actions (one for each 32-bit word) to mangle an IPv6 address. This patch
allows you to mangle fields than are longer than 4-bytes with one single
action. Drivers have been adapted to this new representation following a
simple approach, that is, iterate over the array of words and configure
the hardware IR to make the packet mangling. FLOW_ACTION_MANGLE_MAX_WORDS
defines the maximum number of words from one given offset (currently 4
words).
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
.../net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c | 44 ++++++++++----
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 50 +++++++++++-----
drivers/net/ethernet/netronome/nfp/flower/action.c | 69 ++++++++++++++--------
include/net/flow_offload.h | 9 ++-
net/sched/cls_api.c | 7 ++-
5 files changed, 125 insertions(+), 54 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
index e447976bdd3e..6a961e29a904 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
@@ -428,13 +428,17 @@ static void cxgb4_process_flow_actions(struct net_device *in,
case FLOW_ACTION_MANGLE: {
u32 mask, val, offset;
u8 htype;
+ int i;
htype = act->mangle.htype;
- mask = act->mangle.mask;
- val = act->mangle.val;
offset = act->mangle.offset;
- process_pedit_field(fs, val, mask, offset, htype);
+ for (i = 0; i < act->mangle.words; i++) {
+ mask = act->mangle.data[i].mask;
+ val = act->mangle.data[i].val;
+ process_pedit_field(fs, val, mask, offset, htype);
+ offset += sizeof(u32);
+ }
}
break;
default:
@@ -456,16 +460,9 @@ static bool valid_l4_mask(u32 mask)
return hi && lo ? false : true;
}
-static bool valid_pedit_action(struct net_device *dev,
- const struct flow_action_entry *act)
+static bool __valid_pedit_action(struct net_device *dev, u8 htype,
+ __be32 mask, __be32 offset)
{
- u32 mask, offset;
- u8 htype;
-
- htype = act->mangle.htype;
- mask = act->mangle.mask;
- offset = act->mangle.offset;
-
switch (htype) {
case FLOW_ACT_MANGLE_HDR_TYPE_ETH:
switch (offset) {
@@ -541,6 +538,29 @@ static bool valid_pedit_action(struct net_device *dev,
netdev_err(dev, "%s: Unsupported pedit type\n", __func__);
return false;
}
+
+ return true;
+}
+
+static bool valid_pedit_action(struct net_device *dev,
+ const struct flow_action_entry *act)
+{
+ u32 mask, offset;
+ u8 htype;
+ int i;
+
+ htype = act->mangle.htype;
+ offset = act->mangle.offset;
+
+ for (i = 0; i < act->mangle.words; i++) {
+ mask = act->mangle.data[i].mask;
+
+ if (!__valid_pedit_action(dev, htype, mask, offset))
+ return false;
+
+ offset += sizeof(u32);
+ }
+
return true;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index c57f7533a6d0..bb24616ee27f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -2411,6 +2411,7 @@ static int parse_tc_pedit_action(struct mlx5e_priv *priv,
int err = -EOPNOTSUPP;
u32 mask, val, offset;
u8 htype;
+ int i;
htype = act->mangle.htype;
err = -EOPNOTSUPP; /* can't be all optimistic */
@@ -2426,15 +2427,19 @@ static int parse_tc_pedit_action(struct mlx5e_priv *priv,
goto out_err;
}
- mask = act->mangle.mask;
- val = act->mangle.val;
offset = act->mangle.offset;
- err = set_pedit_val(htype, ~mask, val, offset, &hdrs[cmd]);
- if (err)
- goto out_err;
+ for (i = 0; i < act->mangle.words; i++) {
+ val = act->mangle.data[i].val;
+ mask = act->mangle.data[i].mask;
- hdrs[cmd].pedits++;
+ err = set_pedit_val(htype, ~mask, val, offset, &hdrs[cmd]);
+ if (err)
+ goto out_err;
+
+ offset += sizeof(u32);
+ hdrs[cmd].pedits++;
+ }
return 0;
out_err:
@@ -2523,14 +2528,8 @@ struct ipv6_hoplimit_word {
__u8 hop_limit;
};
-static bool is_action_keys_supported(const struct flow_action_entry *act)
+static bool __is_action_keys_supported(u8 htype, u32 offset, u32 mask)
{
- u32 mask, offset;
- u8 htype;
-
- htype = act->mangle.htype;
- offset = act->mangle.offset;
- mask = ~act->mangle.mask;
/* For IPv4 & IPv6 header check 4 byte word,
* to determine that modified fields
* are NOT ttl & hop_limit only.
@@ -2557,6 +2556,26 @@ static bool is_action_keys_supported(const struct flow_action_entry *act)
return false;
}
+static bool is_action_keys_supported(const struct flow_action_entry *act)
+{
+ u32 mask, offset;
+ u8 htype;
+ int i;
+
+ htype = act->mangle.htype;
+ offset = act->mangle.offset;
+
+ for (i = 0; i < act->mangle.words; i++) {
+ mask = ~act->mangle.data[i].mask;
+ if (!__is_action_keys_supported(htype, offset, mask))
+ return false;
+
+ offset += sizeof(u32);
+ }
+
+ return true;
+}
+
static bool modify_header_match_supported(struct mlx5_flow_spec *spec,
struct flow_action *flow_action,
u32 actions,
@@ -2654,8 +2673,9 @@ static int add_vlan_rewrite_action(struct mlx5e_priv *priv, int namespace,
.id = FLOW_ACTION_MANGLE,
.mangle.htype = FLOW_ACT_MANGLE_HDR_TYPE_ETH,
.mangle.offset = offsetof(struct vlan_ethhdr, h_vlan_TCI),
- .mangle.mask = ~(u32)be16_to_cpu(*(__be16 *)&mask16),
- .mangle.val = (u32)be16_to_cpu(*(__be16 *)&val16),
+ .mangle.data[0].mask = ~(u32)be16_to_cpu(*(__be16 *)&mask16),
+ .mangle.data[0].val = (u32)be16_to_cpu(*(__be16 *)&val16),
+ .mangle.words = 1,
};
u8 match_prio_mask, match_prio_val;
void *headers_c, *headers_v;
diff --git a/drivers/net/ethernet/netronome/nfp/flower/action.c b/drivers/net/ethernet/netronome/nfp/flower/action.c
index 1b019fdfcd97..15bace2354dc 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/action.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/action.c
@@ -485,7 +485,7 @@ static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask)
}
static int
-nfp_fl_set_eth(const struct flow_action_entry *act, u32 off,
+nfp_fl_set_eth(const struct flow_action_entry *act, u32 idx, u32 off,
struct nfp_fl_set_eth *set_eth, struct netlink_ext_ack *extack)
{
u32 exact, mask;
@@ -495,8 +495,8 @@ nfp_fl_set_eth(const struct flow_action_entry *act, u32 off,
return -EOPNOTSUPP;
}
- mask = ~act->mangle.mask;
- exact = act->mangle.val;
+ mask = ~act->mangle.data[idx].mask;
+ exact = act->mangle.data[idx].val;
if (exact & ~mask) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit ethernet action");
@@ -520,7 +520,7 @@ struct ipv4_ttl_word {
};
static int
-nfp_fl_set_ip4(const struct flow_action_entry *act, u32 off,
+nfp_fl_set_ip4(const struct flow_action_entry *act, u32 idx, u32 off,
struct nfp_fl_set_ip4_addrs *set_ip_addr,
struct nfp_fl_set_ip4_ttl_tos *set_ip_ttl_tos,
struct netlink_ext_ack *extack)
@@ -532,8 +532,8 @@ nfp_fl_set_ip4(const struct flow_action_entry *act, u32 off,
__be32 exact, mask;
/* We are expecting tcf_pedit to return a big endian value */
- mask = (__force __be32)~act->mangle.mask;
- exact = (__force __be32)act->mangle.val;
+ mask = (__force __be32)~act->mangle.data[idx].mask;
+ exact = (__force __be32)act->mangle.data[idx].val;
if (exact & ~mask) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv4 action");
@@ -662,7 +662,7 @@ nfp_fl_set_ip6_hop_limit_flow_label(u32 off, __be32 exact, __be32 mask,
}
static int
-nfp_fl_set_ip6(const struct flow_action_entry *act, u32 off,
+nfp_fl_set_ip6(const struct flow_action_entry *act, u32 idx, u32 off,
struct nfp_fl_set_ipv6_addr *ip_dst,
struct nfp_fl_set_ipv6_addr *ip_src,
struct nfp_fl_set_ipv6_tc_hl_fl *ip_hl_fl,
@@ -673,8 +673,8 @@ nfp_fl_set_ip6(const struct flow_action_entry *act, u32 off,
u8 word;
/* We are expecting tcf_pedit to return a big endian value */
- mask = (__force __be32)~act->mangle.mask;
- exact = (__force __be32)act->mangle.val;
+ mask = (__force __be32)~act->mangle.data[idx].mask;
+ exact = (__force __be32)act->mangle.data[idx].val;
if (exact & ~mask) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit IPv6 action");
@@ -702,7 +702,7 @@ nfp_fl_set_ip6(const struct flow_action_entry *act, u32 off,
}
static int
-nfp_fl_set_tport(const struct flow_action_entry *act, u32 off,
+nfp_fl_set_tport(const struct flow_action_entry *act, u32 idx, u32 off,
struct nfp_fl_set_tport *set_tport, int opcode,
struct netlink_ext_ack *extack)
{
@@ -713,8 +713,8 @@ nfp_fl_set_tport(const struct flow_action_entry *act, u32 off,
return -EOPNOTSUPP;
}
- mask = ~act->mangle.mask;
- exact = act->mangle.val;
+ mask = ~act->mangle.data[idx].mask;
+ exact = act->mangle.data[idx].val;
if (exact & ~mask) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: invalid pedit L4 action");
@@ -860,32 +860,31 @@ nfp_fl_commit_mangle(struct flow_cls_offload *flow, char *nfp_action,
}
static int
-nfp_fl_pedit(const struct flow_action_entry *act,
- struct flow_cls_offload *flow, char *nfp_action, int *a_len,
- u32 *csum_updated, struct nfp_flower_pedit_acts *set_act,
- struct netlink_ext_ack *extack)
+__nfp_fl_pedit(const struct flow_action_entry *act, u32 idx, u32 offset,
+ struct flow_cls_offload *flow, char *nfp_action, int *a_len,
+ u32 *csum_updated, struct nfp_flower_pedit_acts *set_act,
+ struct netlink_ext_ack *extack)
{
enum flow_action_mangle_base htype;
- u32 offset;
htype = act->mangle.htype;
- offset = act->mangle.offset;
switch (htype) {
case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
- return nfp_fl_set_eth(act, offset, &set_act->set_eth, extack);
+ return nfp_fl_set_eth(act, idx, offset, &set_act->set_eth,
+ extack);
case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
- return nfp_fl_set_ip4(act, offset, &set_act->set_ip_addr,
+ return nfp_fl_set_ip4(act, idx, offset, &set_act->set_ip_addr,
&set_act->set_ip_ttl_tos, extack);
case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
- return nfp_fl_set_ip6(act, offset, &set_act->set_ip6_dst,
+ return nfp_fl_set_ip6(act, idx, offset, &set_act->set_ip6_dst,
&set_act->set_ip6_src,
&set_act->set_ip6_tc_hl_fl, extack);
case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
- return nfp_fl_set_tport(act, offset, &set_act->set_tport,
+ return nfp_fl_set_tport(act, idx, offset, &set_act->set_tport,
NFP_FL_ACTION_OPCODE_SET_TCP, extack);
case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
- return nfp_fl_set_tport(act, offset, &set_act->set_tport,
+ return nfp_fl_set_tport(act, idx, offset, &set_act->set_tport,
NFP_FL_ACTION_OPCODE_SET_UDP, extack);
default:
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: pedit on unsupported header");
@@ -894,6 +893,30 @@ nfp_fl_pedit(const struct flow_action_entry *act,
}
static int
+nfp_fl_pedit(const struct flow_action_entry *act,
+ struct flow_cls_offload *flow, char *nfp_action, int *a_len,
+ u32 *csum_updated, struct nfp_flower_pedit_acts *set_act,
+ struct netlink_ext_ack *extack)
+{
+ u32 offset, idx;
+ int err;
+
+ offset = act->mangle.offset;
+
+ for (idx = 0; idx < act->mangle.words; idx++) {
+ err = __nfp_fl_pedit(act, idx, offset, flow,
+ nfp_action, a_len, csum_updated, set_act,
+ extack);
+ if (err < 0)
+ return err;
+
+ offset += sizeof(u32);
+ }
+
+ return 0;
+}
+
+static int
nfp_flower_output_action(struct nfp_app *app,
const struct flow_action_entry *act,
struct nfp_fl_payload *nfp_fl, int *a_len,
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index e8069b6c474c..d3fc6b7dcd6a 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -153,6 +153,8 @@ enum flow_action_mangle_base {
FLOW_ACT_MANGLE_HDR_TYPE_UDP,
};
+#define FLOW_ACTION_MANGLE_MAX_WORDS 4
+
struct flow_action_entry {
enum flow_action_id id;
union {
@@ -166,8 +168,11 @@ struct flow_action_entry {
struct { /* FLOW_ACTION_PACKET_EDIT */
enum flow_action_mangle_base htype;
u32 offset;
- u32 mask;
- u32 val;
+ struct {
+ u32 mask;
+ u32 val;
+ } data[FLOW_ACTION_MANGLE_MAX_WORDS];
+ u32 words;
} mangle;
const struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
u32 csum_flags; /* FLOW_ACTION_CSUM */
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index e0d8b456e9f5..041cd4000389 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -3077,9 +3077,12 @@ int tc_setup_flow_action(struct flow_action *flow_action,
goto err_out;
}
entry->mangle.htype = tcf_pedit_htype(act, k);
- entry->mangle.mask = tcf_pedit_mask(act, k);
- entry->mangle.val = tcf_pedit_val(act, k);
+ entry->mangle.data[0].mask =
+ tcf_pedit_mask(act, k);
+ entry->mangle.data[0].val =
+ tcf_pedit_val(act, k);
entry->mangle.offset = tcf_pedit_offset(act, k);
+ entry->mangle.words = 1;
entry = &flow_action->entries[++j];
}
} else if (is_tcf_csum(act)) {
--
2.11.0
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