f1a2e44a3a
Queue/stack maps implement a FIFO/LIFO data storage for ebpf programs. These maps support peek, pop and push operations that are exposed to eBPF programs through the new bpf_map[peek/pop/push] helpers. Those operations are exposed to userspace applications through the already existing syscalls in the following way: BPF_MAP_LOOKUP_ELEM -> peek BPF_MAP_LOOKUP_AND_DELETE_ELEM -> pop BPF_MAP_UPDATE_ELEM -> push Queue/stack maps are implemented using a buffer, tail and head indexes, hence BPF_F_NO_PREALLOC is not supported. As opposite to other maps, queue and stack do not use RCU for protecting maps values, the bpf_map[peek/pop] have a ARG_PTR_TO_UNINIT_MAP_VALUE argument that is a pointer to a memory zone where to save the value of a map. Basically the same as ARG_PTR_TO_UNINIT_MEM, but the size has not be passed as an extra argument. Our main motivation for implementing queue/stack maps was to keep track of a pool of elements, like network ports in a SNAT, however we forsee other use cases, like for exampling saving last N kernel events in a map and then analysing from userspace. Signed-off-by: Mauricio Vasquez B <mauricio.vasquez@polito.it> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* internal file - do not include directly */
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#ifdef CONFIG_NET
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BPF_PROG_TYPE(BPF_PROG_TYPE_SOCKET_FILTER, sk_filter)
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BPF_PROG_TYPE(BPF_PROG_TYPE_SCHED_CLS, tc_cls_act)
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BPF_PROG_TYPE(BPF_PROG_TYPE_SCHED_ACT, tc_cls_act)
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BPF_PROG_TYPE(BPF_PROG_TYPE_XDP, xdp)
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BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SKB, cg_skb)
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BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCK, cg_sock)
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BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCK_ADDR, cg_sock_addr)
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BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_IN, lwt_in)
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BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_OUT, lwt_out)
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BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_XMIT, lwt_xmit)
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BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_SEG6LOCAL, lwt_seg6local)
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BPF_PROG_TYPE(BPF_PROG_TYPE_SOCK_OPS, sock_ops)
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BPF_PROG_TYPE(BPF_PROG_TYPE_SK_SKB, sk_skb)
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BPF_PROG_TYPE(BPF_PROG_TYPE_SK_MSG, sk_msg)
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BPF_PROG_TYPE(BPF_PROG_TYPE_FLOW_DISSECTOR, flow_dissector)
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#endif
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#ifdef CONFIG_BPF_EVENTS
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BPF_PROG_TYPE(BPF_PROG_TYPE_KPROBE, kprobe)
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BPF_PROG_TYPE(BPF_PROG_TYPE_TRACEPOINT, tracepoint)
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BPF_PROG_TYPE(BPF_PROG_TYPE_PERF_EVENT, perf_event)
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BPF_PROG_TYPE(BPF_PROG_TYPE_RAW_TRACEPOINT, raw_tracepoint)
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#endif
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#ifdef CONFIG_CGROUP_BPF
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BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_DEVICE, cg_dev)
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#endif
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#ifdef CONFIG_BPF_LIRC_MODE2
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BPF_PROG_TYPE(BPF_PROG_TYPE_LIRC_MODE2, lirc_mode2)
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#endif
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#ifdef CONFIG_INET
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BPF_PROG_TYPE(BPF_PROG_TYPE_SK_REUSEPORT, sk_reuseport)
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#endif
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BPF_MAP_TYPE(BPF_MAP_TYPE_ARRAY, array_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_PERCPU_ARRAY, percpu_array_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_PROG_ARRAY, prog_array_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_PERF_EVENT_ARRAY, perf_event_array_map_ops)
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#ifdef CONFIG_CGROUPS
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BPF_MAP_TYPE(BPF_MAP_TYPE_CGROUP_ARRAY, cgroup_array_map_ops)
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#endif
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#ifdef CONFIG_CGROUP_BPF
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BPF_MAP_TYPE(BPF_MAP_TYPE_CGROUP_STORAGE, cgroup_storage_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE, cgroup_storage_map_ops)
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#endif
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BPF_MAP_TYPE(BPF_MAP_TYPE_HASH, htab_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_PERCPU_HASH, htab_percpu_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_LRU_HASH, htab_lru_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_LRU_PERCPU_HASH, htab_lru_percpu_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_LPM_TRIE, trie_map_ops)
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#ifdef CONFIG_PERF_EVENTS
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BPF_MAP_TYPE(BPF_MAP_TYPE_STACK_TRACE, stack_trace_map_ops)
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#endif
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BPF_MAP_TYPE(BPF_MAP_TYPE_ARRAY_OF_MAPS, array_of_maps_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_HASH_OF_MAPS, htab_of_maps_map_ops)
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#ifdef CONFIG_NET
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BPF_MAP_TYPE(BPF_MAP_TYPE_DEVMAP, dev_map_ops)
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#if defined(CONFIG_BPF_STREAM_PARSER)
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BPF_MAP_TYPE(BPF_MAP_TYPE_SOCKMAP, sock_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_SOCKHASH, sock_hash_ops)
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#endif
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BPF_MAP_TYPE(BPF_MAP_TYPE_CPUMAP, cpu_map_ops)
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#if defined(CONFIG_XDP_SOCKETS)
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BPF_MAP_TYPE(BPF_MAP_TYPE_XSKMAP, xsk_map_ops)
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#endif
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#ifdef CONFIG_INET
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BPF_MAP_TYPE(BPF_MAP_TYPE_REUSEPORT_SOCKARRAY, reuseport_array_ops)
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#endif
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#endif
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BPF_MAP_TYPE(BPF_MAP_TYPE_QUEUE, queue_map_ops)
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BPF_MAP_TYPE(BPF_MAP_TYPE_STACK, stack_map_ops)
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