X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=instrumentation%2Fevents%2Flttng-module%2Fnet.h;h=7dd68957be97f793c31cd88f5616421c722bd80c;hb=e9d818b9d564b1ca885fc0b8a6d08b0d205c606f;hp=f4a0d97ee13b2c92cced3906579ec6d3f6e3b683;hpb=f127e61ee231d002fb9a7803643a157e06f6d2e2;p=lttng-modules.git diff --git a/instrumentation/events/lttng-module/net.h b/instrumentation/events/lttng-module/net.h index f4a0d97e..7dd68957 100644 --- a/instrumentation/events/lttng-module/net.h +++ b/instrumentation/events/lttng-module/net.h @@ -1,40 +1,456 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #undef TRACE_SYSTEM #define TRACE_SYSTEM net #if !defined(LTTNG_TRACE_NET_H) || defined(TRACE_HEADER_MULTI_READ) #define LTTNG_TRACE_NET_H -#include "../../../probes/lttng-tracepoint-event.h" +#include #include #include #include +#include +#include #include +#include +#include + +#ifndef ONCE_LTTNG_NET_H +#define ONCE_LTTNG_NET_H + +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. + */ + return skb_network_header(skb) != skb->head; +} + +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), + }, + [1] = { + .name = "ihl", + .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), + }, + [3] = { + .name = "tot_len", + .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), + }, + [5] = { + .name = "frag_off", + .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), + }, + [7] = { + .name = "protocol", + .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), + }, + [9] = { + .name = "saddr", + .type = { + .atype = atype_array, + .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), + }, + }, + [10] = { + .name = "daddr", + .type = { + .atype = atype_array, + .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), + }, + [1] = { + .name = "prio", + .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.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), + }, + [4] = { + .name = "nexthdr", + .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), + }, + [6] = { + .name = "saddr", + .type = { + .atype = atype_array, + .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), + }, + }, + [7] = { + .name = "daddr", + .type = { + .atype = atype_array, + .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[] = { + [0] = { + .name = "unknown", + .type = { + .atype = atype_struct, + .u._struct.nr_fields = 0, + .u._struct.fields = emptyfields, + }, + }, + [1] = { + .name = "ipv4", + .type = { + .atype = atype_struct, + .u._struct.nr_fields = ARRAY_SIZE(ipv4fields), + .u._struct.fields = ipv4fields, + }, + }, + [2] = { + .name = "ipv6", + .type = { + .atype = atype_struct, + .u._struct.nr_fields = ARRAY_SIZE(ipv6fields), + .u._struct.fields = ipv6fields, + }, + }, +}; + +enum network_header_types { + NH_NONE, + NH_IPV4, + NH_IPV6, +}; + +static inline unsigned char __get_network_header_type(struct sk_buff *skb) +{ + if (__has_network_hdr(skb)) { + if (skb->protocol == htons(ETH_P_IPV6)) + return NH_IPV6; + else if (skb->protocol == htons(ETH_P_IP)) + return NH_IPV4; + /* Fallthrough for other header types. */ + } + return NH_NONE; +} + +#endif + +LTTNG_TRACEPOINT_ENUM(net_network_header, + TP_ENUM_VALUES( + ctf_enum_value("_unknown", NH_NONE) + ctf_enum_value("_ipv4", NH_IPV4) + ctf_enum_value("_ipv6", NH_IPV6) + ) +) 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(void *, skbaddr, skb) - ctf_integer(unsigned int, len, skb_len) + 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_string(name, skb->dev->name) -#endif ) ) @@ -45,9 +461,67 @@ LTTNG_TRACEPOINT_EVENT_CLASS(net_dev_template, TP_ARGS(skb), TP_FIELDS( - ctf_integer(void *, skbaddr, skb) + ctf_integer_hex(void *, skbaddr, skb) ctf_integer(unsigned int, len, skb->len) ctf_string(name, skb->dev->name) + ctf_enum(net_network_header, unsigned char, + network_header_type, __get_network_header_type(skb)) + ctf_custom_field( + ctf_custom_type( + .atype = atype_variant, + .u.variant.tag_name = "network_header_type", + .u.variant.choices = 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 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. + */ + } + ) + ) ) ) @@ -58,20 +532,197 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(net_dev_template, net_dev_queue, TP_ARGS(skb) ) -LTTNG_TRACEPOINT_EVENT_INSTANCE(net_dev_template, netif_receive_skb, +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_template, + + netif_receive_skb, + + net_if_receive_skb, TP_PROTO(struct sk_buff *skb), TP_ARGS(skb) ) -LTTNG_TRACEPOINT_EVENT_INSTANCE(net_dev_template, netif_rx, +LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_template, + + netif_rx, + + net_if_rx, TP_PROTO(struct sk_buff *skb), TP_ARGS(skb) ) + +#if (LINUX_VERSION_CODE >= 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 (LINUX_VERSION_CODE >= 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 (LINUX_VERSION_CODE >= 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 */ -#include "../../../probes/define_trace.h" +#include