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net: psample: Add tunnel support

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Currently, psample can only send the packet bits after decapsulation.
The tunnel information is lost. Add the tunnel support.

If the sampled packet has no tunnel info, the behavior is the same as
before. If it has, add a nested metadata field named PSAMPLE_ATTR_TUNNEL
and include the tunnel subfields if applicable.

Increase the metadata length for sampled packet with the tunnel info.
If new subfields of tunnel info should be included, update the metadata
length accordingly.

Signed-off-by: Chris Mi <chrism@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chris Mi 2020-05-19 22:45:20 +08:00 • committed by David S. Miller
parent de1b99ef2a
commit d8bed686ab
2 changed files with 179 additions and 0 deletions
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22
include/uapi/linux/psample.h
View file

@ -11,6 +11,7 @@ enum {
PSAMPLE_ATTR_GROUP_SEQ,
PSAMPLE_ATTR_SAMPLE_RATE,
PSAMPLE_ATTR_DATA,
PSAMPLE_ATTR_TUNNEL,
/* commands attributes */
PSAMPLE_ATTR_GROUP_REFCOUNT,
@ -25,6 +26,27 @@ enum psample_command {
PSAMPLE_CMD_DEL_GROUP,
};
enum psample_tunnel_key_attr {
PSAMPLE_TUNNEL_KEY_ATTR_ID, /* be64 Tunnel ID */
PSAMPLE_TUNNEL_KEY_ATTR_IPV4_SRC, /* be32 src IP address. */
PSAMPLE_TUNNEL_KEY_ATTR_IPV4_DST, /* be32 dst IP address. */
PSAMPLE_TUNNEL_KEY_ATTR_TOS, /* u8 Tunnel IP ToS. */
PSAMPLE_TUNNEL_KEY_ATTR_TTL, /* u8 Tunnel IP TTL. */
PSAMPLE_TUNNEL_KEY_ATTR_DONT_FRAGMENT, /* No argument, set DF. */
PSAMPLE_TUNNEL_KEY_ATTR_CSUM, /* No argument. CSUM packet. */
PSAMPLE_TUNNEL_KEY_ATTR_OAM, /* No argument. OAM frame. */
PSAMPLE_TUNNEL_KEY_ATTR_GENEVE_OPTS, /* Array of Geneve options. */
PSAMPLE_TUNNEL_KEY_ATTR_TP_SRC, /* be16 src Transport Port. */
PSAMPLE_TUNNEL_KEY_ATTR_TP_DST, /* be16 dst Transport Port. */
PSAMPLE_TUNNEL_KEY_ATTR_VXLAN_OPTS, /* Nested VXLAN opts* */
PSAMPLE_TUNNEL_KEY_ATTR_IPV6_SRC, /* struct in6_addr src IPv6 address. */
PSAMPLE_TUNNEL_KEY_ATTR_IPV6_DST, /* struct in6_addr dst IPv6 address. */
PSAMPLE_TUNNEL_KEY_ATTR_PAD,
PSAMPLE_TUNNEL_KEY_ATTR_ERSPAN_OPTS, /* struct erspan_metadata */
PSAMPLE_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE, /* No argument. IPV4_INFO_BRIDGE mode.*/
__PSAMPLE_TUNNEL_KEY_ATTR_MAX
};
/* Can be overridden at runtime by module option */
#define PSAMPLE_ATTR_MAX (__PSAMPLE_ATTR_MAX - 1)