diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/bpf.h | 41 | ||||
-rw-r--r-- | include/uapi/linux/bpf.h | 23 |
2 files changed, 64 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h new file mode 100644 index 000000000000..48014a71f0fe --- /dev/null +++ b/include/linux/bpf.h @@ -0,0 +1,41 @@ +/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ +#ifndef _LINUX_BPF_H +#define _LINUX_BPF_H 1 + +#include <uapi/linux/bpf.h> +#include <linux/workqueue.h> + +struct bpf_map; + +/* map is generic key/value storage optionally accesible by eBPF programs */ +struct bpf_map_ops { + /* funcs callable from userspace (via syscall) */ + struct bpf_map *(*map_alloc)(union bpf_attr *attr); + void (*map_free)(struct bpf_map *); +}; + +struct bpf_map { + atomic_t refcnt; + enum bpf_map_type map_type; + u32 key_size; + u32 value_size; + u32 max_entries; + struct bpf_map_ops *ops; + struct work_struct work; +}; + +struct bpf_map_type_list { + struct list_head list_node; + struct bpf_map_ops *ops; + enum bpf_map_type type; +}; + +void bpf_register_map_type(struct bpf_map_type_list *tl); +void bpf_map_put(struct bpf_map *map); + +#endif /* _LINUX_BPF_H */ diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 479ed0b6be16..f58a10f9670c 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -62,4 +62,27 @@ struct bpf_insn { __s32 imm; /* signed immediate constant */ }; +/* BPF syscall commands */ +enum bpf_cmd { + /* create a map with given type and attributes + * fd = bpf(BPF_MAP_CREATE, union bpf_attr *, u32 size) + * returns fd or negative error + * map is deleted when fd is closed + */ + BPF_MAP_CREATE, +}; + +enum bpf_map_type { + BPF_MAP_TYPE_UNSPEC, +}; + +union bpf_attr { + struct { /* anonymous struct used by BPF_MAP_CREATE command */ + __u32 map_type; /* one of enum bpf_map_type */ + __u32 key_size; /* size of key in bytes */ + __u32 value_size; /* size of value in bytes */ + __u32 max_entries; /* max number of entries in a map */ + }; +} __attribute__((aligned(8))); + #endif /* _UAPI__LINUX_BPF_H__ */ |