net/sfc/base: distinguish filters for encapsulated packets

Add filter match flag to distinguish filters applied only to
encapsulated packets.

Match flags set should allow to determine whether a filter
is supported or not. The problem is that if specification
has supported set outer match flags and specified
encapsulation without any inner flags, check says that it
is supported, and filter insertion is performed. However,
there is no filtering of the encapsulated traffic. A new
flag is added to solve this problem and separate the
filters for the encapsulated packets.

Signed-off-by: Roman Zhukov <roman.zhukov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@solarflare.com>
Reviewed-by: Mark Spender <mspender@solarflare.com>

diff --git a/drivers/net/sfc/base/ef10_filter.c b/drivers/net/sfc/base/ef10_filter.c
index e93dc13..a627cce 100644 (file)
--- a/drivers/net/sfc/base/ef10_filter.c
+++ b/drivers/net/sfc/base/ef10_filter.c
@@ -174,6 +174,7 @@ efx_mcdi_filter_op_add(
        efx_mcdi_req_t req;
        uint8_t payload[MAX(MC_CMD_FILTER_OP_EXT_IN_LEN,
                            MC_CMD_FILTER_OP_EXT_OUT_LEN)];
+       efx_filter_match_flags_t match_flags;
        efx_rc_t rc;
 
        memset(payload, 0, sizeof (payload));
@@ -183,6 +184,12 @@ efx_mcdi_filter_op_add(
        req.emr_out_buf = payload;
        req.emr_out_length = MC_CMD_FILTER_OP_EXT_OUT_LEN;
 
+       /*
+        * Remove match flag for encapsulated filters that does not correspond
+        * to the MCDI match flags
+        */
+       match_flags = spec->efs_match_flags & ~EFX_FILTER_MATCH_ENCAP_TYPE;
+
        switch (filter_op) {
        case MC_CMD_FILTER_OP_IN_OP_REPLACE:
                MCDI_IN_SET_DWORD(req, FILTER_OP_EXT_IN_HANDLE_LO,
@@ -203,7 +210,7 @@ efx_mcdi_filter_op_add(
        MCDI_IN_SET_DWORD(req, FILTER_OP_EXT_IN_PORT_ID,
            EVB_PORT_ID_ASSIGNED);
        MCDI_IN_SET_DWORD(req, FILTER_OP_EXT_IN_MATCH_FIELDS,
-           spec->efs_match_flags);
+           match_flags);
        MCDI_IN_SET_DWORD(req, FILTER_OP_EXT_IN_RX_DEST,
            MC_CMD_FILTER_OP_EXT_IN_RX_DEST_HOST);
        MCDI_IN_SET_DWORD(req, FILTER_OP_EXT_IN_RX_QUEUE,
@@ -1008,13 +1015,17 @@ ef10_filter_supported_filters(
            EFX_FILTER_MATCH_IFRM_LOC_MAC |
            EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST |
            EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST |
+           EFX_FILTER_MATCH_ENCAP_TYPE |
            EFX_FILTER_MATCH_UNKNOWN_MCAST_DST |
            EFX_FILTER_MATCH_UNKNOWN_UCAST_DST);
 
        /*
         * Two calls to MC_CMD_GET_PARSER_DISP_INFO are needed: one to get the
         * list of supported filters for ordinary packets, and then another to
-        * get the list of supported filters for encapsulated packets.
+        * get the list of supported filters for encapsulated packets. To
+        * distinguish the second list from the first, the
+        * EFX_FILTER_MATCH_ENCAP_TYPE flag is added to each filter for
+        * encapsulated packets.
         */
        rc = efx_mcdi_get_parser_disp_info(enp, buffer, buffer_length, B_FALSE,
            &mcdi_list_length);
@@ -1042,6 +1053,10 @@ ef10_filter_supported_filters(
                                no_space = B_TRUE;
                        else
                                goto fail2;
+               } else {
+                       for (i = next_buf_idx;
+                           i < next_buf_idx + mcdi_encap_list_length; i++)
+                               buffer[i] |= EFX_FILTER_MATCH_ENCAP_TYPE;
                }
        } else {
                mcdi_encap_list_length = 0;

diff --git a/drivers/net/sfc/base/efx.h b/drivers/net/sfc/base/efx.h
index e2f49ec..bb903e5 100644 (file)
--- a/drivers/net/sfc/base/efx.h
+++ b/drivers/net/sfc/base/efx.h
@@ -2485,6 +2485,11 @@ typedef uint8_t efx_filter_flags_t;
 #define        EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST 0x01000000
 /* For encapsulated packets, match all unicast inner frames */
 #define        EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST 0x02000000
+/*
+ * Match by encap type, this flag does not correspond to
+ * the MCDI match flags and any unoccupied value may be used
+ */
+#define        EFX_FILTER_MATCH_ENCAP_TYPE             0x20000000
 /* Match otherwise-unmatched multicast and broadcast packets */
 #define        EFX_FILTER_MATCH_UNKNOWN_MCAST_DST      0x40000000
 /* Match otherwise-unmatched unicast packets */

diff --git a/drivers/net/sfc/base/efx_filter.c b/drivers/net/sfc/base/efx_filter.c
index 2e6628b..97c972c 100644 (file)
--- a/drivers/net/sfc/base/efx_filter.c
+++ b/drivers/net/sfc/base/efx_filter.c
@@ -418,7 +418,7 @@ efx_filter_spec_set_encap_type(
        __in            efx_tunnel_protocol_t encap_type,
        __in            efx_filter_inner_frame_match_t inner_frame_match)
 {
-       uint32_t match_flags = 0;
+       uint32_t match_flags = EFX_FILTER_MATCH_ENCAP_TYPE;
        uint8_t ip_proto;
        efx_rc_t rc;
 
@@ -499,6 +499,7 @@ efx_filter_spec_set_vxlan_full(
                spec->efs_match_flags |= EFX_FILTER_MATCH_IFRM_LOC_MAC;
                memcpy(spec->efs_ifrm_loc_mac, inner_addr, EFX_MAC_ADDR_LEN);
        }
+       spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
        spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_VXLAN;
 
        return (0);