[PATCH v4 bpf-next 1/9] bpf: make bpf_link API available indepently of CONFIG_BPF_SYSCALL
From: Andrii Nakryiko <hidden>
Date: 2020-07-22 06:46:24
Also in:
bpf
Subsystem:
bpf [core], bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
Similarly to bpf_prog, make bpf_link and related generic API available unconditionally to make it easier to have bpf_link support in various parts of the kernel. Stub out init/prime/settle/cleanup and inc/put APIs. Reported-by: kernel test robot <redacted> Signed-off-by: Andrii Nakryiko <redacted> --- include/linux/bpf.h | 81 ++++++++++++++++++++++++++++++--------------- 1 file changed, 55 insertions(+), 26 deletions(-)
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index bae557ff2da8..33bb21b1dfe5 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h@@ -761,6 +761,32 @@ struct bpf_array_aux { struct work_struct work; }; +struct bpf_link { + atomic64_t refcnt; + u32 id; + enum bpf_link_type type; + const struct bpf_link_ops *ops; + struct bpf_prog *prog; + struct work_struct work; +}; + +struct bpf_link_ops { + void (*release)(struct bpf_link *link); + void (*dealloc)(struct bpf_link *link); + int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, + struct bpf_prog *old_prog); + void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); + int (*fill_link_info)(const struct bpf_link *link, + struct bpf_link_info *info); +}; + +struct bpf_link_primer { + struct bpf_link *link; + struct file *file; + int fd; + u32 id; +}; + struct bpf_struct_ops_value; struct btf_type; struct btf_member;
@@ -1143,32 +1169,6 @@ static inline bool bpf_bypass_spec_v4(void) int bpf_map_new_fd(struct bpf_map *map, int flags); int bpf_prog_new_fd(struct bpf_prog *prog); -struct bpf_link { - atomic64_t refcnt; - u32 id; - enum bpf_link_type type; - const struct bpf_link_ops *ops; - struct bpf_prog *prog; - struct work_struct work; -}; - -struct bpf_link_primer { - struct bpf_link *link; - struct file *file; - int fd; - u32 id; -}; - -struct bpf_link_ops { - void (*release)(struct bpf_link *link); - void (*dealloc)(struct bpf_link *link); - int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, - struct bpf_prog *old_prog); - void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); - int (*fill_link_info)(const struct bpf_link *link, - struct bpf_link_info *info); -}; - void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, const struct bpf_link_ops *ops, struct bpf_prog *prog); int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
@@ -1370,6 +1370,35 @@ static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) { } +static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, + const struct bpf_link_ops *ops, + struct bpf_prog *prog) +{ +} + +static inline int bpf_link_prime(struct bpf_link *link, + struct bpf_link_primer *primer) +{ + return -EOPNOTSUPP; +} + +static inline int bpf_link_settle(struct bpf_link_primer *primer) +{ + return -EOPNOTSUPP; +} + +static inline void bpf_link_cleanup(struct bpf_link_primer *primer) +{ +} + +static inline void bpf_link_inc(struct bpf_link *link) +{ +} + +static inline void bpf_link_put(struct bpf_link *link) +{ +} + static inline int bpf_obj_get_user(const char __user *pathname, int flags) { return -EOPNOTSUPP;
--
2.24.1