1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#include <linux/if_vlan.h>
#include "act.h"
#include "pedit.h"
#include "en/tc_priv.h"
#include "en/mod_hdr.h"
static int pedit_header_offsets[] = {
[FLOW_ACT_MANGLE_HDR_TYPE_ETH] = offsetof(struct pedit_headers, eth),
[FLOW_ACT_MANGLE_HDR_TYPE_IP4] = offsetof(struct pedit_headers, ip4),
[FLOW_ACT_MANGLE_HDR_TYPE_IP6] = offsetof(struct pedit_headers, ip6),
[FLOW_ACT_MANGLE_HDR_TYPE_TCP] = offsetof(struct pedit_headers, tcp),
[FLOW_ACT_MANGLE_HDR_TYPE_UDP] = offsetof(struct pedit_headers, udp),
};
#define pedit_header(_ph, _htype) ((void *)(_ph) + pedit_header_offsets[_htype])
static int
set_pedit_val(u8 hdr_type, u32 mask, u32 val, u32 offset,
struct pedit_headers_action *hdrs,
struct netlink_ext_ack *extack)
{
u32 *curr_pmask, *curr_pval;
curr_pmask = (u32 *)(pedit_header(&hdrs->masks, hdr_type) + offset);
curr_pval = (u32 *)(pedit_header(&hdrs->vals, hdr_type) + offset);
if (*curr_pmask & mask) { /* disallow acting twice on the same location */
NL_SET_ERR_MSG_MOD(extack,
"curr_pmask and new mask same. Acting twice on same location");
goto out_err;
}
*curr_pmask |= mask;
*curr_pval |= (val & mask);
return 0;
out_err:
return -EOPNOTSUPP;
}
int
mlx5e_tc_act_pedit_parse_action(struct mlx5e_priv *priv,
const struct flow_action_entry *act, int namespace,
struct pedit_headers_action *hdrs,
struct netlink_ext_ack *extack)
{
u8 cmd = (act->id == FLOW_ACTION_MANGLE) ? 0 : 1;
u8 htype = act->mangle.htype;
int err = -EOPNOTSUPP;
u32 mask, val, offset;
if (htype == FLOW_ACT_MANGLE_UNSPEC) {
NL_SET_ERR_MSG_MOD(extack, "legacy pedit isn't offloaded");
goto out_err;
}
if (!mlx5e_mod_hdr_max_actions(priv->mdev, namespace)) {
NL_SET_ERR_MSG_MOD(extack, "The pedit offload action is not supported");
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], extack);
if (err)
goto out_err;
hdrs[cmd].pedits++;
return 0;
out_err:
return err;
}
static int
tc_act_parse_pedit(struct mlx5e_tc_act_parse_state *parse_state,
const struct flow_action_entry *act,
struct mlx5e_priv *priv,
struct mlx5_flow_attr *attr)
{
struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr;
struct mlx5e_tc_flow *flow = parse_state->flow;
enum mlx5_flow_namespace_type ns_type;
int err;
ns_type = mlx5e_get_flow_namespace(flow);
err = mlx5e_tc_act_pedit_parse_action(flow->priv, act, ns_type, attr->parse_attr->hdrs,
parse_state->extack);
if (err)
return err;
attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
if (ns_type == MLX5_FLOW_NAMESPACE_FDB) {
esw_attr->split_count = esw_attr->out_count;
parse_state->if_count = 0;
}
return 0;
}
struct mlx5e_tc_act mlx5e_tc_act_pedit = {
.parse_action = tc_act_parse_pedit,
};
|
