diff options
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_rx.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 12 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 15 | ||||
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede_fp.c | 4 | ||||
| -rw-r--r-- | drivers/net/virtio_net.c | 12 | ||||
| -rw-r--r-- | include/linux/bpf_trace.h | 7 | ||||
| -rw-r--r-- | include/trace/events/bpf.h | 347 | ||||
| -rw-r--r-- | include/trace/events/xdp.h | 53 | ||||
| -rw-r--r-- | kernel/bpf/core.c | 9 | ||||
| -rw-r--r-- | kernel/bpf/inode.c | 17 | ||||
| -rw-r--r-- | kernel/bpf/syscall.c | 19 |
11 files changed, 483 insertions, 15 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index e362f99..f15ddba 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -33,6 +33,7 @@ #include <net/busy_poll.h> #include <linux/bpf.h> +#include <linux/bpf_trace.h> #include <linux/mlx4/cq.h> #include <linux/slab.h> #include <linux/mlx4/qp.h> @@ -926,10 +927,12 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud length, cq->ring, &doorbell_pending))) goto consumed; + trace_xdp_exception(dev, xdp_prog, act); goto xdp_drop_no_cnt; /* Drop on xmit failure */ default: bpf_warn_invalid_xdp_action(act); case XDP_ABORTED: + trace_xdp_exception(dev, xdp_prog, act); case XDP_DROP: ring->xdp_drop++; xdp_drop_no_cnt: diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index ba50583..3d2e1a1 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -33,6 +33,7 @@ #include <linux/ip.h> #include <linux/ipv6.h> #include <linux/tcp.h> +#include <linux/bpf_trace.h> #include <net/busy_poll.h> #include "en.h" #include "en_tc.h" @@ -640,7 +641,7 @@ static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_sq *sq) mlx5e_tx_notify_hw(sq, &wqe->ctrl, 0); } -static inline void mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq, +static inline bool mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq, struct mlx5e_dma_info *di, const struct xdp_buff *xdp) { @@ -662,7 +663,7 @@ static inline void mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq, MLX5E_SW2HW_MTU(rq->netdev->mtu) < dma_len)) { rq->stats.xdp_drop++; mlx5e_page_release(rq, di, true); - return; + return false; } if (unlikely(!mlx5e_sq_has_room_for(sq, MLX5E_XDP_TX_WQEBBS))) { @@ -673,7 +674,7 @@ static inline void mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq, } rq->stats.xdp_tx_full++; mlx5e_page_release(rq, di, true); - return; + return false; } dma_len -= MLX5E_XDP_MIN_INLINE; @@ -703,6 +704,7 @@ static inline void mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq, sq->db.xdp.doorbell = true; rq->stats.xdp_tx++; + return true; } /* returns true if packet was consumed by xdp */ @@ -728,11 +730,13 @@ static inline int mlx5e_xdp_handle(struct mlx5e_rq *rq, *len = xdp.data_end - xdp.data; return false; case XDP_TX: - mlx5e_xmit_xdp_frame(rq, di, &xdp); + if (unlikely(!mlx5e_xmit_xdp_frame(rq, di, &xdp))) + trace_xdp_exception(rq->netdev, prog, act); return true; default: bpf_warn_invalid_xdp_action(act); case XDP_ABORTED: + trace_xdp_exception(rq->netdev, prog, act); case XDP_DROP: rq->stats.xdp_drop++; mlx5e_page_release(rq, di, true); diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 67afd95..6ac43ab 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -42,6 +42,7 @@ */ #include <linux/bpf.h> +#include <linux/bpf_trace.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> @@ -1459,7 +1460,7 @@ nfp_net_rx_drop(struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring, dev_kfree_skb_any(skb); } -static void +static bool nfp_net_tx_xdp_buf(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring, struct nfp_net_tx_ring *tx_ring, struct nfp_net_rx_buf *rxbuf, unsigned int pkt_off, @@ -1473,13 +1474,13 @@ nfp_net_tx_xdp_buf(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring, if (unlikely(nfp_net_tx_full(tx_ring, 1))) { nfp_net_rx_drop(rx_ring->r_vec, rx_ring, rxbuf, NULL); - return; + return false; } new_frag = nfp_net_napi_alloc_one(nn, DMA_BIDIRECTIONAL, &new_dma_addr); if (unlikely(!new_frag)) { nfp_net_rx_drop(rx_ring->r_vec, rx_ring, rxbuf, NULL); - return; + return false; } nfp_net_rx_give_one(rx_ring, new_frag, new_dma_addr); @@ -1509,6 +1510,7 @@ nfp_net_tx_xdp_buf(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring, tx_ring->wr_p++; tx_ring->wr_ptr_add++; + return true; } static int nfp_net_run_xdp(struct bpf_prog *prog, void *data, unsigned int len) @@ -1613,12 +1615,15 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) case XDP_PASS: break; case XDP_TX: - nfp_net_tx_xdp_buf(nn, rx_ring, tx_ring, rxbuf, - pkt_off, pkt_len); + if (unlikely(!nfp_net_tx_xdp_buf(nn, rx_ring, + tx_ring, rxbuf, + pkt_off, pkt_len))) + trace_xdp_exception(nn->netdev, xdp_prog, act); continue; default: bpf_warn_invalid_xdp_action(act); case XDP_ABORTED: + trace_xdp_exception(nn->netdev, xdp_prog, act); case XDP_DROP: nfp_net_rx_give_one(rx_ring, rxbuf->frag, rxbuf->dma_addr); diff --git a/drivers/net/ethernet/qlogic/qede/qede_fp.c b/drivers/net/ethernet/qlogic/qede/qede_fp.c index 1a6ca48..445d4d2 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_fp.c +++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c @@ -32,6 +32,7 @@ #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> +#include <linux/bpf_trace.h> #include <net/udp_tunnel.h> #include <linux/ip.h> #include <net/ipv6.h> @@ -1016,6 +1017,7 @@ static bool qede_rx_xdp(struct qede_dev *edev, /* We need the replacement buffer before transmit. */ if (qede_alloc_rx_buffer(rxq, true)) { qede_recycle_rx_bd_ring(rxq, 1); + trace_xdp_exception(edev->ndev, prog, act); return false; } @@ -1026,6 +1028,7 @@ static bool qede_rx_xdp(struct qede_dev *edev, dma_unmap_page(rxq->dev, bd->mapping, PAGE_SIZE, DMA_BIDIRECTIONAL); __free_page(bd->data); + trace_xdp_exception(edev->ndev, prog, act); } /* Regardless, we've consumed an Rx BD */ @@ -1035,6 +1038,7 @@ static bool qede_rx_xdp(struct qede_dev *edev, default: bpf_warn_invalid_xdp_action(act); case XDP_ABORTED: + trace_xdp_exception(edev->ndev, prog, act); case XDP_DROP: qede_recycle_rx_bd_ring(rxq, cqe->bd_num); } diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 37db91d..f9bf948 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -23,6 +23,7 @@ #include <linux/virtio.h> #include <linux/virtio_net.h> #include <linux/bpf.h> +#include <linux/bpf_trace.h> #include <linux/scatterlist.h> #include <linux/if_vlan.h> #include <linux/slab.h> @@ -330,7 +331,7 @@ static struct sk_buff *page_to_skb(struct virtnet_info *vi, return skb; } -static void virtnet_xdp_xmit(struct virtnet_info *vi, +static bool virtnet_xdp_xmit(struct virtnet_info *vi, struct receive_queue *rq, struct send_queue *sq, struct xdp_buff *xdp, @@ -382,10 +383,12 @@ static void virtnet_xdp_xmit(struct virtnet_info *vi, put_page(page); } else /* small buffer */ kfree_skb(data); - return; // On error abort to avoid unnecessary kick + /* On error abort to avoid unnecessary kick */ + return false; } virtqueue_kick(sq->vq); + return true; } static u32 do_xdp_prog(struct virtnet_info *vi, @@ -421,11 +424,14 @@ static u32 do_xdp_prog(struct virtnet_info *vi, vi->xdp_queue_pairs + smp_processor_id(); xdp.data = buf; - virtnet_xdp_xmit(vi, rq, &vi->sq[qp], &xdp, data); + if (unlikely(!virtnet_xdp_xmit(vi, rq, &vi->sq[qp], &xdp, + data))) + trace_xdp_exception(vi->dev, xdp_prog, act); return XDP_TX; default: bpf_warn_invalid_xdp_action(act); case XDP_ABORTED: + trace_xdp_exception(vi->dev, xdp_prog, act); case XDP_DROP: return XDP_DROP; } diff --git a/include/linux/bpf_trace.h b/include/linux/bpf_trace.h new file mode 100644 index 0000000..b22efbd --- /dev/null +++ b/include/linux/bpf_trace.h @@ -0,0 +1,7 @@ +#ifndef __LINUX_BPF_TRACE_H__ +#define __LINUX_BPF_TRACE_H__ + +#include <trace/events/bpf.h> +#include <trace/events/xdp.h> + +#endif /* __LINUX_BPF_TRACE_H__ */ diff --git a/include/trace/events/bpf.h b/include/trace/events/bpf.h new file mode 100644 index 0000000..c3a53fd --- /dev/null +++ b/include/trace/events/bpf.h @@ -0,0 +1,347 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM bpf + +#if !defined(_TRACE_BPF_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_BPF_H + +#include <linux/filter.h> +#include <linux/bpf.h> +#include <linux/fs.h> +#include <linux/tracepoint.h> + +#define __PROG_TYPE_MAP(FN) \ + FN(SOCKET_FILTER) \ + FN(KPROBE) \ + FN(SCHED_CLS) \ + FN(SCHED_ACT) \ + FN(TRACEPOINT) \ + FN(XDP) \ + FN(PERF_EVENT) \ + FN(CGROUP_SKB) \ + FN(CGROUP_SOCK) \ + FN(LWT_IN) \ + FN(LWT_OUT) \ + FN(LWT_XMIT) + +#define __MAP_TYPE_MAP(FN) \ + FN(HASH) \ + FN(ARRAY) \ + FN(PROG_ARRAY) \ + FN(PERF_EVENT_ARRAY) \ + FN(PERCPU_HASH) \ + FN(PERCPU_ARRAY) \ + FN(STACK_TRACE) \ + FN(CGROUP_ARRAY) \ + FN(LRU_HASH) \ + FN(LRU_PERCPU_HASH) \ + FN(LPM_TRIE) + +#define __PROG_TYPE_TP_FN(x) \ + TRACE_DEFINE_ENUM(BPF_PROG_TYPE_##x); +#define __PROG_TYPE_SYM_FN(x) \ + { BPF_PROG_TYPE_##x, #x }, +#define __PROG_TYPE_SYM_TAB \ + __PROG_TYPE_MAP(__PROG_TYPE_SYM_FN) { -1, 0 } +__PROG_TYPE_MAP(__PROG_TYPE_TP_FN) + +#define __MAP_TYPE_TP_FN(x) \ + TRACE_DEFINE_ENUM(BPF_MAP_TYPE_##x); +#define __MAP_TYPE_SYM_FN(x) \ + { BPF_MAP_TYPE_##x, #x }, +#define __MAP_TYPE_SYM_TAB \ + __MAP_TYPE_MAP(__MAP_TYPE_SYM_FN) { -1, 0 } +__MAP_TYPE_MAP(__MAP_TYPE_TP_FN) + +DECLARE_EVENT_CLASS(bpf_prog_event, + + TP_PROTO(const struct bpf_prog *prg), + + TP_ARGS(prg), + + TP_STRUCT__entry( + __array(u8, prog_tag, 8) + __field(u32, type) + ), + + TP_fast_assign( + BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(prg->tag)); + memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag)); + __entry->type = prg->type; + ), + + TP_printk("prog=%s type=%s", + __print_hex_str(__entry->prog_tag, 8), + __print_symbolic(__entry->type, __PROG_TYPE_SYM_TAB)) +); + +DEFINE_EVENT(bpf_prog_event, bpf_prog_get_type, + + TP_PROTO(const struct bpf_prog *prg), + + TP_ARGS(prg) +); + +DEFINE_EVENT(bpf_prog_event, bpf_prog_put_rcu, + + TP_PROTO(const struct bpf_prog *prg), + + TP_ARGS(prg) +); + +TRACE_EVENT(bpf_prog_load, + + TP_PROTO(const struct bpf_prog *prg, int ufd), + + TP_ARGS(prg, ufd), + + TP_STRUCT__entry( + __array(u8, prog_tag, 8) + __field(u32, type) + __field(int, ufd) + ), + + TP_fast_assign( + BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(prg->tag)); + memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag)); + __entry->type = prg->type; + __entry->ufd = ufd; + ), + + TP_printk("prog=%s type=%s ufd=%d", + __print_hex_str(__entry->prog_tag, 8), + __print_symbolic(__entry->type, __PROG_TYPE_SYM_TAB), + __entry->ufd) +); + +TRACE_EVENT(bpf_map_create, + + TP_PROTO(const struct bpf_map *map, int ufd), + + TP_ARGS(map, ufd), + + TP_STRUCT__entry( + __field(u32, type) + __field(u32, size_key) + __field(u32, size_value) + __field(u32, max_entries) + __field(u32, flags) + __field(int, ufd) + ), + + TP_fast_assign( + __entry->type = map->map_type; + __entry->size_key = map->key_size; + __entry->size_value = map->value_size; + __entry->max_entries = map->max_entries; + __entry->flags = map->map_flags; + __entry->ufd = ufd; + ), + + TP_printk("map type=%s ufd=%d key=%u val=%u max=%u flags=%x", + __print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB), + __entry->ufd, __entry->size_key, __entry->size_value, + __entry->max_entries, __entry->flags) +); + +DECLARE_EVENT_CLASS(bpf_obj_prog, + + TP_PROTO(const struct bpf_prog *prg, int ufd, + const struct filename *pname), + + TP_ARGS(prg, ufd, pname), + + TP_STRUCT__entry( + __array(u8, prog_tag, 8) + __field(int, ufd) + __string(path, pname->name) + ), + + TP_fast_assign( + BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(prg->tag)); + memcpy(__entry->prog_tag, prg->tag, sizeof(prg->tag)); + __assign_str(path, pname->name); + __entry->ufd = ufd; + ), + + TP_printk("prog=%s path=%s ufd=%d", + __print_hex_str(__entry->prog_tag, 8), + __get_str(path), __entry->ufd) +); + +DEFINE_EVENT(bpf_obj_prog, bpf_obj_pin_prog, + + TP_PROTO(const struct bpf_prog *prg, int ufd, + const struct filename *pname), + + TP_ARGS(prg, ufd, pname) +); + +DEFINE_EVENT(bpf_obj_prog, bpf_obj_get_prog, + + TP_PROTO(const struct bpf_prog *prg, int ufd, + const struct filename *pname), + + TP_ARGS(prg, ufd, pname) +); + +DECLARE_EVENT_CLASS(bpf_obj_map, + + TP_PROTO(const struct bpf_map *map, int ufd, + const struct filename *pname), + + TP_ARGS(map, ufd, pname), + + TP_STRUCT__entry( + __field(u32, type) + __field(int, ufd) + __string(path, pname->name) + ), + + TP_fast_assign( + __assign_str(path, pname->name); + __entry->type = map->map_type; + __entry->ufd = ufd; + ), + + TP_printk("map type=%s ufd=%d path=%s", + __print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB), + __entry->ufd, __get_str(path)) +); + +DEFINE_EVENT(bpf_obj_map, bpf_obj_pin_map, + + TP_PROTO(const struct bpf_map *map, int ufd, + const struct filename *pname), + + TP_ARGS(map, ufd, pname) +); + +DEFINE_EVENT(bpf_obj_map, bpf_obj_get_map, + + TP_PROTO(const struct bpf_map *map, int ufd, + const struct filename *pname), + + TP_ARGS(map, ufd, pname) +); + +DECLARE_EVENT_CLASS(bpf_map_keyval, + + TP_PROTO(const struct bpf_map *map, int ufd, + const void *key, const void *val), + + TP_ARGS(map, ufd, key, val), + + TP_STRUCT__entry( + __field(u32, type) + __field(u32, key_len) + __dynamic_array(u8, key, map->key_size) + __field(bool, key_trunc) + __field(u32, val_len) + __dynamic_array(u8, val, map->value_size) + __field(bool, val_trunc) + __field(int, ufd) + ), + + TP_fast_assign( + memcpy(__get_dynamic_array(key), key, map->key_size); + memcpy(__get_dynamic_array(val), val, map->value_size); + __entry->type = map->map_type; + __entry->key_len = min(map->key_size, 16U); + __entry->key_trunc = map->key_size != __entry->key_len; + __entry->val_len = min(map->value_size, 16U); + __entry->val_trunc = map->value_size != __entry->val_len; + __entry->ufd = ufd; + ), + + TP_printk("map type=%s ufd=%d key=[%s%s] val=[%s%s]", + __print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB), + __entry->ufd, + __print_hex(__get_dynamic_array(key), __entry->key_len), + __entry->key_trunc ? " ..." : "", + __print_hex(__get_dynamic_array(val), __entry->val_len), + __entry->val_trunc ? " ..." : "") +); + +DEFINE_EVENT(bpf_map_keyval, bpf_map_lookup_elem, + + TP_PROTO(const struct bpf_map *map, int ufd, + const void *key, const void *val), + + TP_ARGS(map, ufd, key, val) +); + +DEFINE_EVENT(bpf_map_keyval, bpf_map_update_elem, + + TP_PROTO(const struct bpf_map *map, int ufd, + const void *key, const void *val), + + TP_ARGS(map, ufd, key, val) +); + +TRACE_EVENT(bpf_map_delete_elem, + + TP_PROTO(const struct bpf_map *map, int ufd, + const void *key), + + TP_ARGS(map, ufd, key), + + TP_STRUCT__entry( + __field(u32, type) + __field(u32, key_len) + __dynamic_array(u8, key, map->key_size) + __field(bool, key_trunc) + __field(int, ufd) + ), + + TP_fast_assign( + memcpy(__get_dynamic_array(key), key, map->key_size); + __entry->type = map->map_type; + __entry->key_len = min(map->key_size, 16U); + __entry->key_trunc = map->key_size != __entry->key_len; + __entry->ufd = ufd; + ), + + TP_printk("map type=%s ufd=%d key=[%s%s]", + __print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB), + __entry->ufd, + __print_hex(__get_dynamic_array(key), __entry->key_len), + __entry->key_trunc ? " ..." : "") +); + +TRACE_EVENT(bpf_map_next_key, + + TP_PROTO(const struct bpf_map *map, int ufd, + const void *key, const void *key_next), + + TP_ARGS(map, ufd, key, key_next), + + TP_STRUCT__entry( + __field(u32, type) + __field(u32, key_len) + __dynamic_array(u8, key, map->key_size) + __dynamic_array(u8, nxt, map->key_size) + __field(bool, key_trunc) + __field(int, ufd) + ), + + TP_fast_assign( + memcpy(__get_dynamic_array(key), key, map->key_size); + memcpy(__get_dynamic_array(nxt), key_next, map->key_size); + __entry->type = map->map_type; + __entry->key_len = min(map->key_size, 16U); + __entry->key_trunc = map->key_size != __entry->key_len; + __entry->ufd = ufd; + ), + + TP_printk("map type=%s ufd=%d key=[%s%s] next=[%s%s]", + __print_symbolic(__entry->type, __MAP_TYPE_SYM_TAB), + __entry->ufd, + __print_hex(__get_dynamic_array(key), __entry->key_len), + __entry->key_trunc ? " ..." : "", + __print_hex(__get_dynamic_array(nxt), __entry->key_len), + __entry->key_trunc ? " ..." : "") +); + +#endif /* _TRACE_BPF_H */ + +#include <trace/define_trace.h> diff --git a/include/trace/events/xdp.h b/include/trace/events/xdp.h new file mode 100644 index 0000000..1b61357 --- /dev/null +++ b/include/trace/events/xdp.h @@ -0,0 +1,53 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM xdp + +#if !defined(_TRACE_XDP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_XDP_H + +#include <linux/netdevice.h> +#include <linux/filter.h> +#include <linux/tracepoint.h> + +#define __XDP_ACT_MAP(FN) \ + FN(ABORTED) \ + FN(DROP) \ + FN(PASS) \ + FN(TX) + +#define __XDP_ACT_TP_FN(x) \ + TRACE_DEFINE_ENUM(XDP_##x); +#define __XDP_ACT_SYM_FN(x) \ + { XDP_##x, #x }, +#define __XDP_ACT_SYM_TAB \ + __XDP_ACT_MAP(__XDP_ACT_SYM_FN) { -1, 0 } +__XDP_ACT_MAP(__XDP_ACT_TP_FN) + +TRACE_EVENT(xdp_exception, + + TP_PROTO(const struct net_device *dev, + const struct bpf_prog *xdp, u32 act), + + TP_ARGS(dev, xdp, act), + + TP_STRUCT__entry( + __string(name, dev->name) + __array(u8, prog_tag, 8) + __field(u32, act) + ), + + TP_fast_assign( + BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(xdp->tag)); + memcpy(__entry->prog_tag, xdp->tag, sizeof(xdp->tag)); + __assign_str(name, dev->name); + __entry->act = act; + ), + + TP_printk("prog=%s device=%s action=%s", + __print_hex_str(__entry->prog_tag, 8), + __get_str(name), + __print_symbolic(__entry->act, __XDP_ACT_SYM_TAB)) +); + +#endif /* _TRACE_XDP_H */ + +#include <trace/define_trace.h> diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 503d421..fddd76b 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -1173,3 +1173,12 @@ int __weak skb_copy_bits(const struct sk_buff *skb, int offset, void *to, { return -EFAULT; } + +/* All definitions of tracepoints related to BPF. */ +#define CREATE_TRACE_POINTS +#include <linux/bpf_trace.h> + +EXPORT_TRACEPOINT_SYMBOL_GPL(xdp_exception); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bpf_prog_get_type); +EXPORT_TRACEPOINT_SYMBOL_GPL(bpf_prog_put_rcu); diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c index 0b030c9..fddcae8 100644 --- a/kernel/bpf/inode.c +++ b/kernel/bpf/inode.c @@ -21,6 +21,7 @@ #include <linux/parser.h> #include <linux/filter.h> #include <linux/bpf.h> +#include <linux/bpf_trace.h> enum bpf_type { BPF_TYPE_UNSPEC = 0, @@ -281,6 +282,13 @@ int bpf_obj_pin_user(u32 ufd, const char __user *pathname) ret = bpf_obj_do_pin(pname, raw, type); if (ret != 0) bpf_any_put(raw, type); + if ((trace_bpf_obj_pin_prog_enabled() || + trace_bpf_obj_pin_map_enabled()) && !ret) { + if (type == BPF_TYPE_PROG) + trace_bpf_obj_pin_prog(raw, ufd, pname); + if (type == BPF_TYPE_MAP) + trace_bpf_obj_pin_map(raw, ufd, pname); + } out: putname(pname); return ret; @@ -342,8 +350,15 @@ int bpf_obj_get_user(const char __user *pathname) else goto out; - if (ret < 0) + if (ret < 0) { bpf_any_put(raw, type); + } else if (trace_bpf_obj_get_prog_enabled() || + trace_bpf_obj_get_map_enabled()) { + if (type == BPF_TYPE_PROG) + trace_bpf_obj_get_prog(raw, ret, pname); + if (type == BPF_TYPE_MAP) + trace_bpf_obj_get_map(raw, ret, pname); + } out: putname(pname); return ret; diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 1d6b29e..05ad086 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -10,6 +10,7 @@ * General Public License for more details. */ #include <linux/bpf.h> +#include <linux/bpf_trace.h> #include <linux/syscalls.h> #include <linux/slab.h> #include <linux/anon_inodes.h> @@ -215,6 +216,7 @@ static int map_create(union bpf_attr *attr) /* failed to allocate fd */ goto free_map; + trace_bpf_map_create(map, err); return err; free_map: @@ -339,6 +341,7 @@ static int map_lookup_elem(union bpf_attr *attr) if (copy_to_user(uvalue, value, value_size) != 0) goto free_value; + trace_bpf_map_lookup_elem(map, ufd, key, value); err = 0; free_value: @@ -421,6 +424,8 @@ static int map_update_elem(union bpf_attr *attr) __this_cpu_dec(bpf_prog_active); preempt_enable(); + if (!err) + trace_bpf_map_update_elem(map, ufd, key, value); free_value: kfree(value); free_key: @@ -466,6 +471,8 @@ static int map_delete_elem(union bpf_attr *attr) __this_cpu_dec(bpf_prog_active); preempt_enable(); + if (!err) + trace_bpf_map_delete_elem(map, ufd, key); free_key: kfree(key); err_put: @@ -518,6 +525,7 @@ static int map_get_next_key(union bpf_attr *attr) if (copy_to_user(unext_key, next_key, map->key_size) != 0) goto free_next_key; + trace_bpf_map_next_key(map, ufd, key, next_key); err = 0; free_next_key: @@ -671,8 +679,10 @@ static void __bpf_prog_put_rcu(struct rcu_head *rcu) void bpf_prog_put(struct bpf_prog *prog) { - if (atomic_dec_and_test(&prog->aux->refcnt)) + if (atomic_dec_and_test(&prog->aux->refcnt)) { + trace_bpf_prog_put_rcu(prog); call_rcu(&prog->aux->rcu, __bpf_prog_put_rcu); + } } EXPORT_SYMBOL_GPL(bpf_prog_put); @@ -781,7 +791,11 @@ struct bpf_prog *bpf_prog_get(u32 ufd) struct bpf_prog *bpf_prog_get_type(u32 ufd, enum bpf_prog_type type) { - return __bpf_prog_get(ufd, &type); + struct bpf_prog *prog = __bpf_prog_get(ufd, &type); + + if (!IS_ERR(prog)) + trace_bpf_prog_get_type(prog); + return prog; } EXPORT_SYMBOL_GPL(bpf_prog_get_type); @@ -863,6 +877,7 @@ static int bpf_prog_load(union bpf_attr *attr) /* failed to allocate fd */ goto free_used_maps; + trace_bpf_prog_load(prog, err); return err; free_used_maps: |
