X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=instrumentation%2Fevents%2Flttng-module%2Fnet.h;h=c66a6dba3fe9310bd6c929aac9224cc073b1b267;hb=2d0428212cbfa3f8428feee160b095f48c2ac974;hp=e33959a2efa1a1d30788417027231dcc8af2b530;hpb=e5990fd415d46da69523dfe7943bc3168664fde8;p=lttng-modules.git diff --git a/instrumentation/events/lttng-module/net.h b/instrumentation/events/lttng-module/net.h index e33959a2..c66a6dba 100644 --- a/instrumentation/events/lttng-module/net.h +++ b/instrumentation/events/lttng-module/net.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #undef TRACE_SYSTEM #define TRACE_SYSTEM net @@ -10,7 +11,7 @@ #include #include #include -#include +#include #include #include @@ -20,8 +21,8 @@ static inline unsigned char __has_network_hdr(struct sk_buff *skb) { /* - * If the header is not set yet, - * the network header will point to the head. + * If the header is not set yet, the network header will point + * to the head. */ return skb_network_header(skb) != skb->head; } @@ -29,50 +30,220 @@ static inline unsigned char __has_network_hdr(struct sk_buff *skb) static struct lttng_event_field emptyfields[] = { }; +/* Structures for transport headers. */ + +static struct lttng_event_field tcpfields[] = { + [0] = { + .name = "source_port", + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), + }, + [1] = { + .name = "dest_port", + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), + }, + [2] = { + .name = "seq", + .type = __type_integer(uint32_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), + }, + [3] = { + .name = "ack_seq", + .type = __type_integer(uint32_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), + }, + [4] = { + .name = "data_offset", + .type = __type_integer(uint8_t, 4, 4, 0, + __BIG_ENDIAN, 10, none), + }, + [5] = { + .name = "reserved", + .type = __type_integer(uint8_t, 3, 1, 0, + __BIG_ENDIAN, 10, none), + }, + [6] = { + .name = "flags", + .type = __type_integer(uint8_t, 9, 1, 0, + __BIG_ENDIAN, 16, none), + }, + [7] = { + .name = "window_size", + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), + }, + [8] = { + .name = "checksum", + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 16, none), + }, + [9] = { + .name = "urg_ptr", + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), + }, +}; + +static struct lttng_event_field transport_fields[] = { + [0] = { + .name = "unknown", + .type = { + .atype = atype_struct, + .u._struct.nr_fields = ARRAY_SIZE(emptyfields), + .u._struct.fields = emptyfields, + }, + }, + [1] = { + .name = "tcp", + .type = { + .atype = atype_struct, + .u._struct.nr_fields = ARRAY_SIZE(tcpfields), + .u._struct.fields = tcpfields, + }, + }, +}; + +enum transport_header_types { + TH_NONE = 0, + TH_TCP = 1, +}; + +static inline enum transport_header_types __get_transport_header_type(struct sk_buff *skb) +{ + if (__has_network_hdr(skb)) { + /* + * When both transport and network headers are set, + * transport header is greater than network header, + * otherwise it points to head. + */ + if (skb->transport_header > skb->network_header) { + /* + * Get the transport protocol from the network + * header's data. This method works both for + * sent and received packets. + */ + if ((skb->protocol == htons(ETH_P_IP) && + ip_hdr(skb)->protocol == IPPROTO_TCP) || + (skb->protocol == htons(ETH_P_IPV6) && + ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)) + return TH_TCP; + } + /* Fallthrough for other cases where header is not TCP. */ + } + return TH_NONE; +} + +static struct lttng_enum_entry proto_transport_enum_entries[] = { + [0] = { + .start = { .value = 0, .signedness = 0, }, + .end = { .value = IPPROTO_TCP - 1, .signedness = 0, }, + .string = "_unknown", + }, + [1] = { + .start = { .value = IPPROTO_TCP, .signedness = 0, }, + .end = { .value = IPPROTO_TCP, .signedness = 0, }, + .string = "_tcp", + }, + [2] = { + .start = { .value = IPPROTO_TCP + 1, .signedness = 0, }, + .end = { .value = 255, .signedness = 0, }, + .string = "_unknown", + }, +}; + +static const struct lttng_enum_desc proto_transport_header_type = { + .name = "proto_transport_header_type", + .entries = proto_transport_enum_entries, + .nr_entries = ARRAY_SIZE(proto_transport_enum_entries), +}; + +static struct lttng_enum_entry transport_enum_entries[] = { + [0] = { + .start = { .value = TH_NONE, .signedness = 0, }, + .end = { .value = TH_NONE, .signedness = 0, }, + .string = "_unknown", + }, + [1] = { + .start = { .value = TH_TCP, .signedness = 0, }, + .end = { .value = TH_TCP, .signedness = 0, }, + .string = "_tcp", + }, +}; + +static const struct lttng_enum_desc transport_header_type = { + .name = "transport_header_type", + .entries = transport_enum_entries, + .nr_entries = ARRAY_SIZE(transport_enum_entries), +}; + /* Structures for network headers. */ static struct lttng_event_field ipv4fields[] = { [0] = { .name = "version", - .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint8_t, 4, 4, 0, + __BIG_ENDIAN, 10, none), }, [1] = { .name = "ihl", - .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint8_t, 4, 4, 0, + __BIG_ENDIAN, 10, none), }, [2] = { .name = "tos", - .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint8_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), }, [3] = { .name = "tot_len", - .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), }, [4] = { .name = "id", - .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none), + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 16, none), }, [5] = { .name = "frag_off", - .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), }, [6] = { .name = "ttl", - .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint8_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), }, [7] = { .name = "protocol", - .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = { + .atype = atype_enum, + .u.basic.enumeration.desc = + &proto_transport_header_type, + .u.basic.enumeration.container_type = { + .size = 8, + .alignment = 8, + .signedness = 0, + .reverse_byte_order = + __BIG_ENDIAN != __BYTE_ORDER, + .base = 10, + .encoding = lttng_encode_none, + }, + }, }, [8] = { .name = "checksum", - .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none), + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 16, none), }, [9] = { .name = "saddr", .type = { .atype = atype_array, - .u.array.elem_type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .u.array.elem_type = + __type_integer(uint8_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), .u.array.length = 4, .u.array.elem_alignment = lttng_alignof(uint8_t), }, @@ -81,48 +252,95 @@ static struct lttng_event_field ipv4fields[] = { .name = "daddr", .type = { .atype = atype_array, - .u.array.elem_type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .u.array.elem_type = + __type_integer(uint8_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), .u.array.length = 4, .u.array.elem_alignment = lttng_alignof(uint8_t), }, }, + [11] = { + .name = "transport_header_type", + .type = { + .atype = atype_enum, + .u.basic.enumeration.desc = &transport_header_type, + .u.basic.enumeration.container_type = { + .size = 8, + .alignment = 8, + .signedness = 0, + .reverse_byte_order = 0, + .base = 10, + .encoding = lttng_encode_none, + }, + }, + }, + [12] = { + .name = "transport_header", + .type = { + .atype = atype_variant, + .u.variant.tag_name = "transport_header_type", + .u.variant.choices = transport_fields, + .u.variant.nr_choices = ARRAY_SIZE(transport_fields), + }, + }, }; static struct lttng_event_field ipv6fields[] = { [0] = { .name = "version", - .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint8_t, 4, 4, 0, + __BIG_ENDIAN, 10, none), }, [1] = { .name = "prio", - .type = __type_integer(uint8_t, 4, 4, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint8_t, 4, 4, 0, + __BIG_ENDIAN, 10, none), }, [2] = { .name = "flow_lbl", .type = { .atype = atype_array, - .u.array.elem_type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 16, none), + .u.array.elem_type = + __type_integer(uint8_t, 0, 0, 0, + __BIG_ENDIAN, 16, none), .u.array.length = 3, .u.array.elem_alignment = lttng_alignof(uint8_t), }, }, [3] = { .name = "payload_len", - .type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), }, [4] = { .name = "nexthdr", - .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = { + .atype = atype_enum, + .u.basic.enumeration.desc = + &proto_transport_header_type, + .u.basic.enumeration.container_type = { + .size = 8, + .alignment = 8, + .signedness = 0, + .reverse_byte_order = + __BIG_ENDIAN != __BYTE_ORDER, + .base = 10, + .encoding = lttng_encode_none, + }, + }, }, [5] = { .name = "hop_limit", - .type = __type_integer(uint8_t, 0, 0, 0, __BIG_ENDIAN, 10, none), + .type = __type_integer(uint8_t, 0, 0, 0, + __BIG_ENDIAN, 10, none), }, [6] = { .name = "saddr", .type = { .atype = atype_array, - .u.array.elem_type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none), + .u.array.elem_type = + __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 16, none), .u.array.length = 8, .u.array.elem_alignment = lttng_alignof(uint16_t), }, @@ -131,11 +349,37 @@ static struct lttng_event_field ipv6fields[] = { .name = "daddr", .type = { .atype = atype_array, - .u.array.elem_type = __type_integer(uint16_t, 0, 0, 0, __BIG_ENDIAN, 16, none), + .u.array.elem_type = + __type_integer(uint16_t, 0, 0, 0, + __BIG_ENDIAN, 16, none), .u.array.length = 8, .u.array.elem_alignment = lttng_alignof(uint16_t), }, }, + [8] = { + .name = "transport_header_type", + .type = { + .atype = atype_enum, + .u.basic.enumeration.desc = &transport_header_type, + .u.basic.enumeration.container_type = { + .size = 8, + .alignment = 8, + .signedness = 0, + .reverse_byte_order = 0, + .base = 10, + .encoding = lttng_encode_none, + }, + }, + }, + [9] = { + .name = "transport_header", + .type = { + .atype = atype_variant, + .u.variant.tag_name = "transport_header_type", + .u.variant.choices = transport_fields, + .u.variant.nr_choices = ARRAY_SIZE(transport_fields), + }, + }, }; static struct lttng_event_field network_fields[] = { @@ -195,30 +439,18 @@ LTTNG_TRACEPOINT_ENUM(net_network_header, LTTNG_TRACEPOINT_EVENT(net_dev_xmit, -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,40)) TP_PROTO(struct sk_buff *skb, int rc, struct net_device *dev, unsigned int skb_len), TP_ARGS(skb, rc, dev, skb_len), -#else - TP_PROTO(struct sk_buff *skb, - int rc), - - TP_ARGS(skb, rc), -#endif TP_FIELDS( ctf_integer_hex(void *, skbaddr, skb) ctf_integer(int, rc, rc) -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,40)) ctf_integer(unsigned int, len, skb_len) ctf_string(name, dev->name) -#else - ctf_integer(unsigned int, len, skb->len) - ctf_string(name, skb->dev->name) -#endif ) ) @@ -239,27 +471,55 @@ LTTNG_TRACEPOINT_EVENT_CLASS(net_dev_template, .atype = atype_variant, .u.variant.tag_name = "network_header_type", .u.variant.choices = network_fields, - .u.variant.nr_choices = ARRAY_SIZE(network_fields), + .u.variant.nr_choices = + ARRAY_SIZE(network_fields), ), network_header, ctf_custom_code( + bool has_network_header = false; + + /* Copy the network header. */ switch (__get_network_header_type(skb)) { case NH_IPV4: { ctf_align(uint16_t) ctf_array_type(uint8_t, ip_hdr(skb), sizeof(struct iphdr)) + has_network_header = true; break; } case NH_IPV6: { ctf_align(uint16_t) ctf_array_type(uint8_t, ipv6_hdr(skb), sizeof(struct ipv6hdr)) + has_network_header = true; break; } default: - /* For any other header type, there is nothing to do. */ + /* + * For any other network header + * type, there is nothing to do. + */ break; } + + if (has_network_header) { + enum transport_header_types th_type = + __get_transport_header_type(skb); + + /* Transport header type field. */ + ctf_integer_type(unsigned char, th_type) + + /* Copy the transport header. */ + if (th_type == TH_TCP) { + ctf_align(uint32_t) + ctf_array_type(uint8_t, tcp_hdr(skb), + sizeof(struct tcphdr)) + } + /* + * For any other transport header type, + * there is nothing to do. + */ + } ) ) ) @@ -293,6 +553,175 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_template, TP_ARGS(skb) ) + +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,14,0)) + +/* Trace events for the receive entry points */ +LTTNG_TRACEPOINT_EVENT_CLASS(net_dev_receive_entry_template, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb), + + TP_FIELDS( + ctf_integer_hex(const void *, skbaddr, skb) + ) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_entry_template, + + napi_gro_frags_entry, + + net_napi_gro_frags_entry, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_entry_template, + + napi_gro_receive_entry, + + net_napi_gro_receive_entry, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_entry_template, + + netif_receive_skb_entry, + + net_if_receive_skb_entry, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_entry_template, + + netif_rx_entry, + + net_if_rx_entry, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_entry_template, + + netif_rx_ni_entry, + + net_if_rx_ni_entry, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb) +) + +#endif /* kernel > 3.14 */ + +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,19,0)) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_entry_template, + + netif_receive_skb_list_entry, + + net_if_receive_skb_list_entry, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb) +) + +#endif /* kernel > 4.19 */ + +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,0,0)) + +/* Trace events for the receive exit points */ +LTTNG_TRACEPOINT_EVENT_CLASS(net_dev_receive_exit_template, + + TP_PROTO(int ret), + + TP_ARGS(ret), + + TP_FIELDS( + ctf_integer(int, ret, ret) + ) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_exit_template, + + napi_gro_frags_exit, + + net_napi_gro_frags_exit, + + TP_PROTO(int ret), + + TP_ARGS(ret) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_exit_template, + + napi_gro_receive_exit, + + net_napi_gro_receive_exit, + + TP_PROTO(int ret), + + TP_ARGS(ret) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_exit_template, + + netif_receive_skb_exit, + + net_if_receive_skb_exit, + + TP_PROTO(int ret), + + TP_ARGS(ret) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_exit_template, + + netif_rx_exit, + + net_if_rx_exit, + + TP_PROTO(int ret), + + TP_ARGS(ret) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_exit_template, + + netif_rx_ni_exit, + + net_if_rx_ni_exit, + + TP_PROTO(int ret), + + TP_ARGS(ret) +) + +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_receive_exit_template, + + netif_receive_skb_list_exit, + + net_if_receive_skb_list_exit, + + TP_PROTO(int ret), + + TP_ARGS(ret) +) + +#endif /* kernel > 5.0.0 */ + #endif /* LTTNG_TRACE_NET_H */ /* This part must be outside protection */