mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 09:56:16 +07:00
1385d755cf
For passing device functions for offloaded eBPF programs, there used to be no place where to store the pointer without making the non-offloaded programs pay a memory price. As a consequence, three functions were called with ndo_bpf() through specific commands. Now that we have struct bpf_offload_dev, and since none of those operations rely on RTNL, we can turn these three commands into hooks inside the struct bpf_prog_offload_ops, and pass them as part of bpf_offload_dev_create(). This commit effectively passes a pointer to the struct to bpf_offload_dev_create(). We temporarily have two struct bpf_prog_offload_ops instances, one under offdev->ops and one under offload->dev_ops. The next patches will make the transition towards the former, so that offload->dev_ops can be removed, and callbacks relying on ndo_bpf() added to offdev->ops as well. While at it, rename "nfp_bpf_analyzer_ops" as "nfp_bpf_dev_ops" (and similarly for netdevsim). Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
873 lines
27 KiB
C
873 lines
27 KiB
C
/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#ifndef _LINUX_BPF_H
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#define _LINUX_BPF_H 1
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#include <uapi/linux/bpf.h>
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#include <linux/workqueue.h>
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#include <linux/file.h>
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#include <linux/percpu.h>
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#include <linux/err.h>
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#include <linux/rbtree_latch.h>
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#include <linux/numa.h>
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#include <linux/wait.h>
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struct bpf_verifier_env;
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struct perf_event;
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struct bpf_prog;
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struct bpf_map;
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struct sock;
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struct seq_file;
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struct btf_type;
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/* map is generic key/value storage optionally accesible by eBPF programs */
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struct bpf_map_ops {
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/* funcs callable from userspace (via syscall) */
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int (*map_alloc_check)(union bpf_attr *attr);
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struct bpf_map *(*map_alloc)(union bpf_attr *attr);
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void (*map_release)(struct bpf_map *map, struct file *map_file);
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void (*map_free)(struct bpf_map *map);
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int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
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void (*map_release_uref)(struct bpf_map *map);
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/* funcs callable from userspace and from eBPF programs */
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void *(*map_lookup_elem)(struct bpf_map *map, void *key);
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int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
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int (*map_delete_elem)(struct bpf_map *map, void *key);
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int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
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int (*map_pop_elem)(struct bpf_map *map, void *value);
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int (*map_peek_elem)(struct bpf_map *map, void *value);
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/* funcs called by prog_array and perf_event_array map */
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void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
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int fd);
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void (*map_fd_put_ptr)(void *ptr);
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u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
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u32 (*map_fd_sys_lookup_elem)(void *ptr);
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void (*map_seq_show_elem)(struct bpf_map *map, void *key,
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struct seq_file *m);
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int (*map_check_btf)(const struct bpf_map *map,
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const struct btf_type *key_type,
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const struct btf_type *value_type);
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};
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struct bpf_map {
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/* The first two cachelines with read-mostly members of which some
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* are also accessed in fast-path (e.g. ops, max_entries).
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*/
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const struct bpf_map_ops *ops ____cacheline_aligned;
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struct bpf_map *inner_map_meta;
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#ifdef CONFIG_SECURITY
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void *security;
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#endif
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enum bpf_map_type map_type;
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u32 key_size;
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u32 value_size;
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u32 max_entries;
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u32 map_flags;
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u32 pages;
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u32 id;
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int numa_node;
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u32 btf_key_type_id;
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u32 btf_value_type_id;
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struct btf *btf;
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bool unpriv_array;
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/* 55 bytes hole */
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/* The 3rd and 4th cacheline with misc members to avoid false sharing
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* particularly with refcounting.
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*/
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struct user_struct *user ____cacheline_aligned;
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atomic_t refcnt;
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atomic_t usercnt;
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struct work_struct work;
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char name[BPF_OBJ_NAME_LEN];
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};
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struct bpf_offload_dev;
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struct bpf_offloaded_map;
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struct bpf_map_dev_ops {
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int (*map_get_next_key)(struct bpf_offloaded_map *map,
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void *key, void *next_key);
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int (*map_lookup_elem)(struct bpf_offloaded_map *map,
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void *key, void *value);
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int (*map_update_elem)(struct bpf_offloaded_map *map,
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void *key, void *value, u64 flags);
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int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
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};
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struct bpf_offloaded_map {
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struct bpf_map map;
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struct net_device *netdev;
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const struct bpf_map_dev_ops *dev_ops;
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void *dev_priv;
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struct list_head offloads;
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};
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static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
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{
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return container_of(map, struct bpf_offloaded_map, map);
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}
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static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
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{
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return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
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}
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static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
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{
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return map->btf && map->ops->map_seq_show_elem;
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}
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int map_check_no_btf(const struct bpf_map *map,
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const struct btf_type *key_type,
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const struct btf_type *value_type);
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extern const struct bpf_map_ops bpf_map_offload_ops;
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/* function argument constraints */
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enum bpf_arg_type {
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ARG_DONTCARE = 0, /* unused argument in helper function */
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/* the following constraints used to prototype
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* bpf_map_lookup/update/delete_elem() functions
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*/
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ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
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ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
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ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
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ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
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/* the following constraints used to prototype bpf_memcmp() and other
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* functions that access data on eBPF program stack
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*/
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ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
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ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
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ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
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* helper function must fill all bytes or clear
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* them in error case.
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*/
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ARG_CONST_SIZE, /* number of bytes accessed from memory */
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ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
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ARG_PTR_TO_CTX, /* pointer to context */
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ARG_ANYTHING, /* any (initialized) argument is ok */
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ARG_PTR_TO_SOCKET, /* pointer to bpf_sock */
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};
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/* type of values returned from helper functions */
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enum bpf_return_type {
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RET_INTEGER, /* function returns integer */
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RET_VOID, /* function doesn't return anything */
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RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
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RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
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RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
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};
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/* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
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* to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
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* instructions after verifying
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*/
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struct bpf_func_proto {
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u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
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bool gpl_only;
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bool pkt_access;
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enum bpf_return_type ret_type;
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enum bpf_arg_type arg1_type;
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enum bpf_arg_type arg2_type;
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enum bpf_arg_type arg3_type;
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enum bpf_arg_type arg4_type;
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enum bpf_arg_type arg5_type;
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};
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/* bpf_context is intentionally undefined structure. Pointer to bpf_context is
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* the first argument to eBPF programs.
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* For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
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*/
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struct bpf_context;
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enum bpf_access_type {
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BPF_READ = 1,
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BPF_WRITE = 2
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};
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/* types of values stored in eBPF registers */
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/* Pointer types represent:
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* pointer
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* pointer + imm
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* pointer + (u16) var
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* pointer + (u16) var + imm
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* if (range > 0) then [ptr, ptr + range - off) is safe to access
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* if (id > 0) means that some 'var' was added
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* if (off > 0) means that 'imm' was added
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*/
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enum bpf_reg_type {
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NOT_INIT = 0, /* nothing was written into register */
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SCALAR_VALUE, /* reg doesn't contain a valid pointer */
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PTR_TO_CTX, /* reg points to bpf_context */
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CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
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PTR_TO_MAP_VALUE, /* reg points to map element value */
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PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
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PTR_TO_STACK, /* reg == frame_pointer + offset */
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PTR_TO_PACKET_META, /* skb->data - meta_len */
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PTR_TO_PACKET, /* reg points to skb->data */
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PTR_TO_PACKET_END, /* skb->data + headlen */
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PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
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PTR_TO_SOCKET, /* reg points to struct bpf_sock */
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PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
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};
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/* The information passed from prog-specific *_is_valid_access
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* back to the verifier.
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*/
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struct bpf_insn_access_aux {
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enum bpf_reg_type reg_type;
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int ctx_field_size;
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};
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static inline void
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bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
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{
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aux->ctx_field_size = size;
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}
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struct bpf_prog_ops {
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int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
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union bpf_attr __user *uattr);
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};
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struct bpf_verifier_ops {
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/* return eBPF function prototype for verification */
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const struct bpf_func_proto *
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(*get_func_proto)(enum bpf_func_id func_id,
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const struct bpf_prog *prog);
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/* return true if 'size' wide access at offset 'off' within bpf_context
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* with 'type' (read or write) is allowed
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*/
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bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
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const struct bpf_prog *prog,
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struct bpf_insn_access_aux *info);
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int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
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const struct bpf_prog *prog);
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int (*gen_ld_abs)(const struct bpf_insn *orig,
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struct bpf_insn *insn_buf);
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u32 (*convert_ctx_access)(enum bpf_access_type type,
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const struct bpf_insn *src,
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struct bpf_insn *dst,
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struct bpf_prog *prog, u32 *target_size);
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};
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struct bpf_prog_offload_ops {
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int (*insn_hook)(struct bpf_verifier_env *env,
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int insn_idx, int prev_insn_idx);
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int (*finalize)(struct bpf_verifier_env *env);
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};
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struct bpf_prog_offload {
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struct bpf_prog *prog;
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struct net_device *netdev;
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void *dev_priv;
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struct list_head offloads;
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bool dev_state;
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const struct bpf_prog_offload_ops *dev_ops;
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void *jited_image;
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u32 jited_len;
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};
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enum bpf_cgroup_storage_type {
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BPF_CGROUP_STORAGE_SHARED,
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BPF_CGROUP_STORAGE_PERCPU,
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__BPF_CGROUP_STORAGE_MAX
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};
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#define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
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struct bpf_prog_aux {
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atomic_t refcnt;
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u32 used_map_cnt;
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u32 max_ctx_offset;
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u32 max_pkt_offset;
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u32 stack_depth;
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u32 id;
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u32 func_cnt;
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bool offload_requested;
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struct bpf_prog **func;
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void *jit_data; /* JIT specific data. arch dependent */
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struct latch_tree_node ksym_tnode;
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struct list_head ksym_lnode;
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const struct bpf_prog_ops *ops;
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struct bpf_map **used_maps;
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struct bpf_prog *prog;
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struct user_struct *user;
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u64 load_time; /* ns since boottime */
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struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
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char name[BPF_OBJ_NAME_LEN];
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#ifdef CONFIG_SECURITY
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void *security;
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#endif
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struct bpf_prog_offload *offload;
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union {
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struct work_struct work;
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struct rcu_head rcu;
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};
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};
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struct bpf_array {
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struct bpf_map map;
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u32 elem_size;
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u32 index_mask;
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/* 'ownership' of prog_array is claimed by the first program that
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* is going to use this map or by the first program which FD is stored
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* in the map to make sure that all callers and callees have the same
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* prog_type and JITed flag
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*/
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enum bpf_prog_type owner_prog_type;
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bool owner_jited;
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union {
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char value[0] __aligned(8);
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void *ptrs[0] __aligned(8);
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void __percpu *pptrs[0] __aligned(8);
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};
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};
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#define MAX_TAIL_CALL_CNT 32
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struct bpf_event_entry {
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struct perf_event *event;
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struct file *perf_file;
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struct file *map_file;
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struct rcu_head rcu;
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};
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bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
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int bpf_prog_calc_tag(struct bpf_prog *fp);
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const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
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typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
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unsigned long off, unsigned long len);
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typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
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const struct bpf_insn *src,
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struct bpf_insn *dst,
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struct bpf_prog *prog,
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u32 *target_size);
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u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
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void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
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int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
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union bpf_attr __user *uattr);
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int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
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union bpf_attr __user *uattr);
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/* an array of programs to be executed under rcu_lock.
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*
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* Typical usage:
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* ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
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*
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* the structure returned by bpf_prog_array_alloc() should be populated
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* with program pointers and the last pointer must be NULL.
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* The user has to keep refcnt on the program and make sure the program
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* is removed from the array before bpf_prog_put().
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* The 'struct bpf_prog_array *' should only be replaced with xchg()
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* since other cpus are walking the array of pointers in parallel.
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*/
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struct bpf_prog_array_item {
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struct bpf_prog *prog;
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struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
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};
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struct bpf_prog_array {
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struct rcu_head rcu;
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struct bpf_prog_array_item items[0];
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};
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struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
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void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
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int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
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int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
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__u32 __user *prog_ids, u32 cnt);
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void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
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struct bpf_prog *old_prog);
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int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
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u32 *prog_ids, u32 request_cnt,
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u32 *prog_cnt);
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int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
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struct bpf_prog *exclude_prog,
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struct bpf_prog *include_prog,
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struct bpf_prog_array **new_array);
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#define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
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({ \
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struct bpf_prog_array_item *_item; \
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struct bpf_prog *_prog; \
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struct bpf_prog_array *_array; \
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u32 _ret = 1; \
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preempt_disable(); \
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rcu_read_lock(); \
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_array = rcu_dereference(array); \
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if (unlikely(check_non_null && !_array))\
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goto _out; \
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_item = &_array->items[0]; \
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while ((_prog = READ_ONCE(_item->prog))) { \
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bpf_cgroup_storage_set(_item->cgroup_storage); \
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_ret &= func(_prog, ctx); \
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_item++; \
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} \
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_out: \
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rcu_read_unlock(); \
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preempt_enable_no_resched(); \
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_ret; \
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})
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#define BPF_PROG_RUN_ARRAY(array, ctx, func) \
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__BPF_PROG_RUN_ARRAY(array, ctx, func, false)
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#define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
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__BPF_PROG_RUN_ARRAY(array, ctx, func, true)
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#ifdef CONFIG_BPF_SYSCALL
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DECLARE_PER_CPU(int, bpf_prog_active);
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extern const struct file_operations bpf_map_fops;
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extern const struct file_operations bpf_prog_fops;
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#define BPF_PROG_TYPE(_id, _name) \
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extern const struct bpf_prog_ops _name ## _prog_ops; \
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extern const struct bpf_verifier_ops _name ## _verifier_ops;
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#define BPF_MAP_TYPE(_id, _ops) \
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extern const struct bpf_map_ops _ops;
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#include <linux/bpf_types.h>
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#undef BPF_PROG_TYPE
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#undef BPF_MAP_TYPE
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extern const struct bpf_prog_ops bpf_offload_prog_ops;
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extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
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extern const struct bpf_verifier_ops xdp_analyzer_ops;
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struct bpf_prog *bpf_prog_get(u32 ufd);
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struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
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bool attach_drv);
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struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
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void bpf_prog_sub(struct bpf_prog *prog, int i);
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struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
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struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
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void bpf_prog_put(struct bpf_prog *prog);
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int __bpf_prog_charge(struct user_struct *user, u32 pages);
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void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
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void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
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void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
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struct bpf_map *bpf_map_get_with_uref(u32 ufd);
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struct bpf_map *__bpf_map_get(struct fd f);
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struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
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void bpf_map_put_with_uref(struct bpf_map *map);
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void bpf_map_put(struct bpf_map *map);
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int bpf_map_precharge_memlock(u32 pages);
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int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
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void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
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void *bpf_map_area_alloc(size_t size, int numa_node);
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void bpf_map_area_free(void *base);
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void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
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extern int sysctl_unprivileged_bpf_disabled;
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int bpf_map_new_fd(struct bpf_map *map, int flags);
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int bpf_prog_new_fd(struct bpf_prog *prog);
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int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
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int bpf_obj_get_user(const char __user *pathname, int flags);
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int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
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int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
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int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
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u64 flags);
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int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
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u64 flags);
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int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
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int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
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void *key, void *value, u64 map_flags);
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int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
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int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
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void *key, void *value, u64 map_flags);
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int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
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int bpf_get_file_flag(int flags);
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int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
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size_t actual_size);
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/* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
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* forced to use 'long' read/writes to try to atomically copy long counters.
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* Best-effort only. No barriers here, since it _will_ race with concurrent
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* updates from BPF programs. Called from bpf syscall and mostly used with
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* size 8 or 16 bytes, so ask compiler to inline it.
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*/
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static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
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{
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const long *lsrc = src;
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long *ldst = dst;
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size /= sizeof(long);
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while (size--)
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*ldst++ = *lsrc++;
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}
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/* verify correctness of eBPF program */
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int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
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void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
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/* Map specifics */
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struct xdp_buff;
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struct sk_buff;
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struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
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void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
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void __dev_map_flush(struct bpf_map *map);
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int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
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struct net_device *dev_rx);
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int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
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struct bpf_prog *xdp_prog);
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struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
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void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
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void __cpu_map_flush(struct bpf_map *map);
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int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
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struct net_device *dev_rx);
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/* Return map's numa specified by userspace */
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static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
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{
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return (attr->map_flags & BPF_F_NUMA_NODE) ?
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attr->numa_node : NUMA_NO_NODE;
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}
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struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
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int array_map_alloc_check(union bpf_attr *attr);
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#else /* !CONFIG_BPF_SYSCALL */
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static inline struct bpf_prog *bpf_prog_get(u32 ufd)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
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enum bpf_prog_type type,
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bool attach_drv)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
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int i)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
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{
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}
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static inline void bpf_prog_put(struct bpf_prog *prog)
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{
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}
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static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline struct bpf_prog *__must_check
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bpf_prog_inc_not_zero(struct bpf_prog *prog)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
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{
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return 0;
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}
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static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
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{
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}
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static inline int bpf_obj_get_user(const char __user *pathname, int flags)
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{
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return -EOPNOTSUPP;
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}
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static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
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u32 key)
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{
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return NULL;
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}
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static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
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{
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}
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static inline void __dev_map_flush(struct bpf_map *map)
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{
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}
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struct xdp_buff;
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struct bpf_dtab_netdev;
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static inline
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int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
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struct net_device *dev_rx)
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{
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return 0;
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}
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struct sk_buff;
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static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
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struct sk_buff *skb,
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struct bpf_prog *xdp_prog)
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{
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return 0;
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}
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static inline
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struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
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{
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return NULL;
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}
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static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
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{
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}
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static inline void __cpu_map_flush(struct bpf_map *map)
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{
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}
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static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
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struct xdp_buff *xdp,
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struct net_device *dev_rx)
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{
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return 0;
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}
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static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
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enum bpf_prog_type type)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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#endif /* CONFIG_BPF_SYSCALL */
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static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
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enum bpf_prog_type type)
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{
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return bpf_prog_get_type_dev(ufd, type, false);
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}
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bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
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int bpf_prog_offload_compile(struct bpf_prog *prog);
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void bpf_prog_offload_destroy(struct bpf_prog *prog);
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int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
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struct bpf_prog *prog);
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int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
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int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
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int bpf_map_offload_update_elem(struct bpf_map *map,
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void *key, void *value, u64 flags);
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int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
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int bpf_map_offload_get_next_key(struct bpf_map *map,
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void *key, void *next_key);
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bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
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struct bpf_offload_dev *
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bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops);
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void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
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int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
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struct net_device *netdev);
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void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
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struct net_device *netdev);
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bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
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#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
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int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
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static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
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{
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return aux->offload_requested;
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}
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static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
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{
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return unlikely(map->ops == &bpf_map_offload_ops);
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}
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struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
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void bpf_map_offload_map_free(struct bpf_map *map);
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#else
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static inline int bpf_prog_offload_init(struct bpf_prog *prog,
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union bpf_attr *attr)
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{
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return -EOPNOTSUPP;
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}
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static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
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{
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return false;
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}
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static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
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{
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return false;
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}
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static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline void bpf_map_offload_map_free(struct bpf_map *map)
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{
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}
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#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
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#if defined(CONFIG_BPF_STREAM_PARSER)
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int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
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int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
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#else
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static inline int sock_map_prog_update(struct bpf_map *map,
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struct bpf_prog *prog, u32 which)
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{
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return -EOPNOTSUPP;
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}
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static inline int sock_map_get_from_fd(const union bpf_attr *attr,
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struct bpf_prog *prog)
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{
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return -EINVAL;
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}
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#endif
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#if defined(CONFIG_XDP_SOCKETS)
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struct xdp_sock;
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struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
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int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
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struct xdp_sock *xs);
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void __xsk_map_flush(struct bpf_map *map);
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#else
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struct xdp_sock;
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static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
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u32 key)
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{
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return NULL;
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}
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static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
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struct xdp_sock *xs)
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{
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return -EOPNOTSUPP;
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}
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static inline void __xsk_map_flush(struct bpf_map *map)
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{
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}
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#endif
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#if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
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void bpf_sk_reuseport_detach(struct sock *sk);
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int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
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void *value);
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int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
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void *value, u64 map_flags);
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#else
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static inline void bpf_sk_reuseport_detach(struct sock *sk)
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{
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}
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#ifdef CONFIG_BPF_SYSCALL
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static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
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void *key, void *value)
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{
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return -EOPNOTSUPP;
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}
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static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
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void *key, void *value,
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u64 map_flags)
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{
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return -EOPNOTSUPP;
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}
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#endif /* CONFIG_BPF_SYSCALL */
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#endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
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/* verifier prototypes for helper functions called from eBPF programs */
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extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
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extern const struct bpf_func_proto bpf_map_update_elem_proto;
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extern const struct bpf_func_proto bpf_map_delete_elem_proto;
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extern const struct bpf_func_proto bpf_map_push_elem_proto;
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extern const struct bpf_func_proto bpf_map_pop_elem_proto;
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extern const struct bpf_func_proto bpf_map_peek_elem_proto;
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extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
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extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
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extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
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extern const struct bpf_func_proto bpf_tail_call_proto;
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extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
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extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
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extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
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extern const struct bpf_func_proto bpf_get_current_comm_proto;
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extern const struct bpf_func_proto bpf_get_stackid_proto;
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extern const struct bpf_func_proto bpf_get_stack_proto;
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extern const struct bpf_func_proto bpf_sock_map_update_proto;
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extern const struct bpf_func_proto bpf_sock_hash_update_proto;
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extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
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extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
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extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
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extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
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extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
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extern const struct bpf_func_proto bpf_get_local_storage_proto;
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/* Shared helpers among cBPF and eBPF. */
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void bpf_user_rnd_init_once(void);
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u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
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#if defined(CONFIG_NET)
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bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
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struct bpf_insn_access_aux *info);
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u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
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const struct bpf_insn *si,
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struct bpf_insn *insn_buf,
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struct bpf_prog *prog,
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u32 *target_size);
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#else
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static inline bool bpf_sock_is_valid_access(int off, int size,
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enum bpf_access_type type,
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struct bpf_insn_access_aux *info)
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{
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return false;
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}
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static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
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const struct bpf_insn *si,
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struct bpf_insn *insn_buf,
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struct bpf_prog *prog,
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u32 *target_size)
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{
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return 0;
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}
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#endif
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#endif /* _LINUX_BPF_H */
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