mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-13 14:14:37 +00:00
5cad527d5f
In the commit c504e5c2f9 ("net: skb: introduce kfree_skb_reason()")
drop reason is introduced to the tracepoint of kfree_skb. Therefore,
drop_monitor is able to report the drop reason to users by netlink.
The drop reasons are reported as string to users, which is exactly
the same as what we do when reporting it to ftrace.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220209060838.55513-1-imagedong@tencent.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
#ifndef __NET_DROPMON_H
|
|
#define __NET_DROPMON_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/netlink.h>
|
|
|
|
struct net_dm_drop_point {
|
|
__u8 pc[8];
|
|
__u32 count;
|
|
};
|
|
|
|
#define is_drop_point_hw(x) do {\
|
|
int ____i, ____j;\
|
|
for (____i = 0; ____i < 8; i ____i++)\
|
|
____j |= x[____i];\
|
|
____j;\
|
|
} while (0)
|
|
|
|
#define NET_DM_CFG_VERSION 0
|
|
#define NET_DM_CFG_ALERT_COUNT 1
|
|
#define NET_DM_CFG_ALERT_DELAY 2
|
|
#define NET_DM_CFG_MAX 3
|
|
|
|
struct net_dm_config_entry {
|
|
__u32 type;
|
|
__u64 data __attribute__((aligned(8)));
|
|
};
|
|
|
|
struct net_dm_config_msg {
|
|
__u32 entries;
|
|
struct net_dm_config_entry options[0];
|
|
};
|
|
|
|
struct net_dm_alert_msg {
|
|
__u32 entries;
|
|
struct net_dm_drop_point points[0];
|
|
};
|
|
|
|
struct net_dm_user_msg {
|
|
union {
|
|
struct net_dm_config_msg user;
|
|
struct net_dm_alert_msg alert;
|
|
} u;
|
|
};
|
|
|
|
|
|
/* These are the netlink message types for this protocol */
|
|
|
|
enum {
|
|
NET_DM_CMD_UNSPEC = 0,
|
|
NET_DM_CMD_ALERT,
|
|
NET_DM_CMD_CONFIG,
|
|
NET_DM_CMD_START,
|
|
NET_DM_CMD_STOP,
|
|
NET_DM_CMD_PACKET_ALERT,
|
|
NET_DM_CMD_CONFIG_GET,
|
|
NET_DM_CMD_CONFIG_NEW,
|
|
NET_DM_CMD_STATS_GET,
|
|
NET_DM_CMD_STATS_NEW,
|
|
_NET_DM_CMD_MAX,
|
|
};
|
|
|
|
#define NET_DM_CMD_MAX (_NET_DM_CMD_MAX - 1)
|
|
|
|
/*
|
|
* Our group identifiers
|
|
*/
|
|
#define NET_DM_GRP_ALERT 1
|
|
|
|
enum net_dm_attr {
|
|
NET_DM_ATTR_UNSPEC,
|
|
|
|
NET_DM_ATTR_ALERT_MODE, /* u8 */
|
|
NET_DM_ATTR_PC, /* u64 */
|
|
NET_DM_ATTR_SYMBOL, /* string */
|
|
NET_DM_ATTR_IN_PORT, /* nested */
|
|
NET_DM_ATTR_TIMESTAMP, /* u64 */
|
|
NET_DM_ATTR_PROTO, /* u16 */
|
|
NET_DM_ATTR_PAYLOAD, /* binary */
|
|
NET_DM_ATTR_PAD,
|
|
NET_DM_ATTR_TRUNC_LEN, /* u32 */
|
|
NET_DM_ATTR_ORIG_LEN, /* u32 */
|
|
NET_DM_ATTR_QUEUE_LEN, /* u32 */
|
|
NET_DM_ATTR_STATS, /* nested */
|
|
NET_DM_ATTR_HW_STATS, /* nested */
|
|
NET_DM_ATTR_ORIGIN, /* u16 */
|
|
NET_DM_ATTR_HW_TRAP_GROUP_NAME, /* string */
|
|
NET_DM_ATTR_HW_TRAP_NAME, /* string */
|
|
NET_DM_ATTR_HW_ENTRIES, /* nested */
|
|
NET_DM_ATTR_HW_ENTRY, /* nested */
|
|
NET_DM_ATTR_HW_TRAP_COUNT, /* u32 */
|
|
NET_DM_ATTR_SW_DROPS, /* flag */
|
|
NET_DM_ATTR_HW_DROPS, /* flag */
|
|
NET_DM_ATTR_FLOW_ACTION_COOKIE, /* binary */
|
|
NET_DM_ATTR_REASON, /* string */
|
|
|
|
__NET_DM_ATTR_MAX,
|
|
NET_DM_ATTR_MAX = __NET_DM_ATTR_MAX - 1
|
|
};
|
|
|
|
/**
|
|
* enum net_dm_alert_mode - Alert mode.
|
|
* @NET_DM_ALERT_MODE_SUMMARY: A summary of recent drops is sent to user space.
|
|
* @NET_DM_ALERT_MODE_PACKET: Each dropped packet is sent to user space along
|
|
* with metadata.
|
|
*/
|
|
enum net_dm_alert_mode {
|
|
NET_DM_ALERT_MODE_SUMMARY,
|
|
NET_DM_ALERT_MODE_PACKET,
|
|
};
|
|
|
|
enum {
|
|
NET_DM_ATTR_PORT_NETDEV_IFINDEX, /* u32 */
|
|
NET_DM_ATTR_PORT_NETDEV_NAME, /* string */
|
|
|
|
__NET_DM_ATTR_PORT_MAX,
|
|
NET_DM_ATTR_PORT_MAX = __NET_DM_ATTR_PORT_MAX - 1
|
|
};
|
|
|
|
enum {
|
|
NET_DM_ATTR_STATS_DROPPED, /* u64 */
|
|
|
|
__NET_DM_ATTR_STATS_MAX,
|
|
NET_DM_ATTR_STATS_MAX = __NET_DM_ATTR_STATS_MAX - 1
|
|
};
|
|
|
|
enum net_dm_origin {
|
|
NET_DM_ORIGIN_SW,
|
|
NET_DM_ORIGIN_HW,
|
|
};
|
|
|
|
#endif
|