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Merge branch 'net-trap-control-action'

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Jiri Pirko says:

====================
net: introduce trap control action to tc and offload it

This patchset introduces a control action dedicated to indicate
to trap the matched packet to CPU. This is specific action for
HW offloads. Also, the patchset offloads the action to mlxsw driver.

Example usage:
$ tc filter add dev enp3s0np19 parent ffff: protocol ip prio 20 flower skip_sw dst_ip 192.168.10.1 action trap

v1->v2:
- patch 1
  - fix the comment according to Andrew's note
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-06-06 12:45:25 -04:00
commit 359fce1d40
24 changed files with 89 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
View File

@ -40,6 +40,7 @@
#include <linux/list.h>
#include "item.h"
#include "trap.h"
#include "core_acl_flex_actions.h"
enum mlxsw_afa_set_type {
@ -662,6 +663,16 @@ EXPORT_SYMBOL(mlxsw_afa_block_append_vlan_modify);
#define MLXSW_AFA_TRAPDISC_CODE 0x03
#define MLXSW_AFA_TRAPDISC_SIZE 1
enum mlxsw_afa_trapdisc_trap_action {
MLXSW_AFA_TRAPDISC_TRAP_ACTION_NOP = 0,
MLXSW_AFA_TRAPDISC_TRAP_ACTION_TRAP = 2,
};
/* afa_trapdisc_trap_action
* Trap Action.
*/
MLXSW_ITEM32(afa, trapdisc, trap_action, 0x00, 24, 4);
enum mlxsw_afa_trapdisc_forward_action {
MLXSW_AFA_TRAPDISC_FORWARD_ACTION_DISCARD = 3,
};
@ -671,11 +682,20 @@ enum mlxsw_afa_trapdisc_forward_action {
*/
MLXSW_ITEM32(afa, trapdisc, forward_action, 0x00, 0, 4);
/* afa_trapdisc_trap_id
* Trap ID to configure.
*/
MLXSW_ITEM32(afa, trapdisc, trap_id, 0x04, 0, 9);
static inline void
mlxsw_afa_trapdisc_pack(char *payload,
enum mlxsw_afa_trapdisc_forward_action forward_action)
enum mlxsw_afa_trapdisc_trap_action trap_action,
enum mlxsw_afa_trapdisc_forward_action forward_action,
u16 trap_id)
{
mlxsw_afa_trapdisc_trap_action_set(payload, trap_action);
mlxsw_afa_trapdisc_forward_action_set(payload, forward_action);
mlxsw_afa_trapdisc_trap_id_set(payload, trap_id);
}
int mlxsw_afa_block_append_drop(struct mlxsw_afa_block *block)
@ -686,11 +706,27 @@ int mlxsw_afa_block_append_drop(struct mlxsw_afa_block *block)
if (!act)
return -ENOBUFS;
mlxsw_afa_trapdisc_pack(act, MLXSW_AFA_TRAPDISC_FORWARD_ACTION_DISCARD);
mlxsw_afa_trapdisc_pack(act, MLXSW_AFA_TRAPDISC_TRAP_ACTION_NOP,
MLXSW_AFA_TRAPDISC_FORWARD_ACTION_DISCARD, 0);
return 0;
}
EXPORT_SYMBOL(mlxsw_afa_block_append_drop);
int mlxsw_afa_block_append_trap(struct mlxsw_afa_block *block)
{
char *act = mlxsw_afa_block_append_action(block,
MLXSW_AFA_TRAPDISC_CODE,
MLXSW_AFA_TRAPDISC_SIZE);
if (!act)
return -ENOBUFS;
mlxsw_afa_trapdisc_pack(act, MLXSW_AFA_TRAPDISC_TRAP_ACTION_TRAP,
MLXSW_AFA_TRAPDISC_FORWARD_ACTION_DISCARD,
MLXSW_TRAP_ID_ACL0);
return 0;
}
EXPORT_SYMBOL(mlxsw_afa_block_append_trap);
/* Forwarding Action
* -----------------
* Forwarding Action can be used to implement Policy Based Switching (PBS)

1
drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h
View File

@ -60,6 +60,7 @@ u32 mlxsw_afa_block_first_set_kvdl_index(struct mlxsw_afa_block *block);
void mlxsw_afa_block_continue(struct mlxsw_afa_block *block);
void mlxsw_afa_block_jump(struct mlxsw_afa_block *block, u16 group_id);
int mlxsw_afa_block_append_drop(struct mlxsw_afa_block *block);
int mlxsw_afa_block_append_trap(struct mlxsw_afa_block *block);
int mlxsw_afa_block_append_fwd(struct mlxsw_afa_block *block,
u8 local_port, bool in_port);
int mlxsw_afa_block_append_vlan_modify(struct mlxsw_afa_block *block,

2
drivers/net/ethernet/mellanox/mlxsw/pci_hw.h
View File

@ -155,7 +155,7 @@ MLXSW_ITEM32(pci, cqe, byte_count, 0x04, 0, 14);
/* pci_cqe_trap_id
* Trap ID that captured the packet.
*/
MLXSW_ITEM32(pci, cqe, trap_id, 0x08, 0, 8);
MLXSW_ITEM32(pci, cqe, trap_id, 0x08, 0, 9);
/* pci_cqe_crc
* Length include CRC. Indicates the length field includes

4
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -3261,7 +3261,9 @@ static const struct mlxsw_listener mlxsw_sp_listener[] = {
MLXSW_SP_RXL_NO_MARK(BGP_IPV4, TRAP_TO_CPU, BGP_IPV4, false),
/* PKT Sample trap */
MLXSW_RXL(mlxsw_sp_rx_listener_sample_func, PKT_SAMPLE, MIRROR_TO_CPU,
false, SP_IP2ME, DISCARD)
false, SP_IP2ME, DISCARD),
/* ACL trap */
MLXSW_SP_RXL_NO_MARK(ACL0, TRAP_TO_CPU, IP2ME, false),
};
static int mlxsw_sp_cpu_policers_set(struct mlxsw_core *mlxsw_core)

1
drivers/net/ethernet/mellanox/mlxsw/spectrum.h
View File

@ -460,6 +460,7 @@ void mlxsw_sp_acl_rulei_act_continue(struct mlxsw_sp_acl_rule_info *rulei);
void mlxsw_sp_acl_rulei_act_jump(struct mlxsw_sp_acl_rule_info *rulei,
u16 group_id);
int mlxsw_sp_acl_rulei_act_drop(struct mlxsw_sp_acl_rule_info *rulei);
int mlxsw_sp_acl_rulei_act_trap(struct mlxsw_sp_acl_rule_info *rulei);
int mlxsw_sp_acl_rulei_act_fwd(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_rule_info *rulei,
struct net_device *out_dev);

5
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
View File

@ -347,6 +347,11 @@ int mlxsw_sp_acl_rulei_act_drop(struct mlxsw_sp_acl_rule_info *rulei)
return mlxsw_afa_block_append_drop(rulei->act_block);
}
int mlxsw_sp_acl_rulei_act_trap(struct mlxsw_sp_acl_rule_info *rulei)
{
return mlxsw_afa_block_append_trap(rulei->act_block);
}
int mlxsw_sp_acl_rulei_act_fwd(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_acl_rule_info *rulei,
struct net_device *out_dev)

4
drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
View File

@ -67,6 +67,10 @@ static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
err = mlxsw_sp_acl_rulei_act_drop(rulei);
if (err)
return err;
} else if (is_tcf_gact_trap(a)) {
err = mlxsw_sp_acl_rulei_act_trap(rulei);
if (err)
return err;
} else if (is_tcf_mirred_egress_redirect(a)) {
int ifindex = tcf_mirred_ifindex(a);
struct net_device *out_dev;

1
drivers/net/ethernet/mellanox/mlxsw/trap.h
View File

@ -66,6 +66,7 @@ enum {
MLXSW_TRAP_ID_RTR_INGRESS0 = 0x70,
MLXSW_TRAP_ID_BGP_IPV4 = 0x88,
MLXSW_TRAP_ID_HOST_MISS_IPV4 = 0x90,
MLXSW_TRAP_ID_ACL0 = 0x1C0,
MLXSW_TRAP_ID_MAX = 0x1FF
};

15
include/net/tc_act/tc_gact.h
View File

@ -15,7 +15,7 @@ struct tcf_gact {
};
#define to_gact(a) ((struct tcf_gact *)a)
static inline bool is_tcf_gact_shot(const struct tc_action *a)
static inline bool __is_tcf_gact_act(const struct tc_action *a, int act)
{
#ifdef CONFIG_NET_CLS_ACT
struct tcf_gact *gact;
@ -24,10 +24,21 @@ static inline bool is_tcf_gact_shot(const struct tc_action *a)
return false;
gact = to_gact(a);
if (gact->tcf_action == TC_ACT_SHOT)
if (gact->tcf_action == act)
return true;
#endif
return false;
}
static inline bool is_tcf_gact_shot(const struct tc_action *a)
{
return __is_tcf_gact_act(a, TC_ACT_SHOT);
}
static inline bool is_tcf_gact_trap(const struct tc_action *a)
{
return __is_tcf_gact_act(a, TC_ACT_TRAP);
}
#endif /* __NET_TC_GACT_H */

7
include/uapi/linux/pkt_cls.h
View File

@ -37,6 +37,13 @@ enum {
#define TC_ACT_QUEUED 5
#define TC_ACT_REPEAT 6
#define TC_ACT_REDIRECT 7
#define TC_ACT_TRAP 8 /* For hw path, this means "trap to cpu"
* and don't further process the frame
* in hardware. For sw path, this is
* equivalent of TC_ACT_STOLEN - drop
* the skb and act like everything
* is alright.
*/
/* There is a special kind of actions called "extended actions",
* which need a value parameter. These have a local opcode located in

2
net/core/dev.c
View File

@ -3269,6 +3269,7 @@ sch_handle_egress(struct sk_buff *skb, int *ret, struct net_device *dev)
return NULL;
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
*ret = NET_XMIT_SUCCESS;
consume_skb(skb);
return NULL;
@ -4038,6 +4039,7 @@ sch_handle_ingress(struct sk_buff *skb, struct packet_type **pt_prev, int *ret,
return NULL;
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
consume_skb(skb);
return NULL;
case TC_ACT_REDIRECT:

1
net/sched/cls_bpf.c
View File

@ -70,6 +70,7 @@ static int cls_bpf_exec_opcode(int code)
case TC_ACT_OK:
case TC_ACT_SHOT:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
case TC_ACT_REDIRECT:
case TC_ACT_UNSPEC:
return code;

1
net/sched/sch_atm.c
View File

@ -406,6 +406,7 @@ done:
switch (result) {
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
__qdisc_drop(skb, to_free);
return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:

1
net/sched/sch_cbq.c
View File

@ -254,6 +254,7 @@ cbq_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
switch (result) {
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return NULL;

1
net/sched/sch_drr.c
View File

@ -339,6 +339,7 @@ static struct drr_class *drr_classify(struct sk_buff *skb, struct Qdisc *sch,
switch (result) {
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return NULL;

1
net/sched/sch_dsmark.c
View File

@ -243,6 +243,7 @@ static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch,
#ifdef CONFIG_NET_CLS_ACT
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
__qdisc_drop(skb, to_free);
return NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;

1
net/sched/sch_fq_codel.c
View File

@ -103,6 +103,7 @@ static unsigned int fq_codel_classify(struct sk_buff *skb, struct Qdisc *sch,
switch (result) {
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return 0;

1
net/sched/sch_hfsc.c
View File

@ -1155,6 +1155,7 @@ hfsc_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
switch (result) {
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return NULL;

1
net/sched/sch_htb.c
View File

@ -238,6 +238,7 @@ static struct htb_class *htb_classify(struct sk_buff *skb, struct Qdisc *sch,
switch (result) {
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return NULL;

1
net/sched/sch_multiq.c
View File

@ -52,6 +52,7 @@ multiq_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
switch (err) {
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return NULL;

1
net/sched/sch_prio.c
View File

@ -48,6 +48,7 @@ prio_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
switch (err) {
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return NULL;

1
net/sched/sch_qfq.c
View File

@ -726,6 +726,7 @@ static struct qfq_class *qfq_classify(struct sk_buff *skb, struct Qdisc *sch,
switch (result) {
case TC_ACT_QUEUED:
case TC_ACT_STOLEN:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return NULL;

1
net/sched/sch_sfb.c
View File

@ -266,6 +266,7 @@ static bool sfb_classify(struct sk_buff *skb, struct tcf_proto *fl,
switch (result) {
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return false;

1
net/sched/sch_sfq.c
View File

@ -187,6 +187,7 @@ static unsigned int sfq_classify(struct sk_buff *skb, struct Qdisc *sch,
switch (result) {
case TC_ACT_STOLEN:
case TC_ACT_QUEUED:
case TC_ACT_TRAP:
*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
case TC_ACT_SHOT:
return 0;