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shared: bpf_attach_type {from,to} string

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Introduce bpf_cgroup_attach_type_table with accustomed attached type
names also used in bpftool.
Add bpf_cgroup_attach_type_{from|to}_string helpers to convert from|to
string representation of pinned bpf program, e.g.
"egress:/sys/fs/bpf/egress-hook" for
/sys/fs/bpf/egress-hook path and BPF_CGROUP_INET_EGRESS attach type.
This commit is contained in:
Julia Kartseva 2021-02-04 00:02:07 -08:00
parent f23f0ead1f
commit 9984f4933b
2 changed files with 27 additions and 0 deletions
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24
src/shared/bpf-program.c
View File

@ -11,6 +11,30 @@
#include "memory-util.h"
#include "missing_syscall.h"
#include "path-util.h"
#include "string-table.h"
static const char *const bpf_cgroup_attach_type_table[__MAX_BPF_ATTACH_TYPE] = {
[BPF_CGROUP_INET_INGRESS] = "ingress",
[BPF_CGROUP_INET_EGRESS] = "egress",
[BPF_CGROUP_INET_SOCK_CREATE] = "sock_create",
[BPF_CGROUP_SOCK_OPS] = "sock_ops",
[BPF_CGROUP_DEVICE] = "device",
[BPF_CGROUP_INET4_BIND] = "bind4",
[BPF_CGROUP_INET6_BIND] = "bind6",
[BPF_CGROUP_INET4_CONNECT] = "connect4",
[BPF_CGROUP_INET6_CONNECT] = "connect6",
[BPF_CGROUP_INET4_POST_BIND] = "post_bind4",
[BPF_CGROUP_INET6_POST_BIND] = "post_bind6",
[BPF_CGROUP_UDP4_SENDMSG] = "sendmsg4",
[BPF_CGROUP_UDP6_SENDMSG] = "sendmsg6",
[BPF_CGROUP_SYSCTL] = "sysctl",
[BPF_CGROUP_UDP4_RECVMSG] = "recvmsg4",
[BPF_CGROUP_UDP6_RECVMSG] = "recvmsg6",
[BPF_CGROUP_GETSOCKOPT] = "getsockopt",
[BPF_CGROUP_SETSOCKOPT] = "setsockopt",
};
DEFINE_STRING_TABLE_LOOKUP(bpf_cgroup_attach_type, int);
/* struct bpf_prog_info info must be initialized since its value is both input and output
* for BPF_OBJ_GET_INFO_BY_FD syscall. */

3
src/shared/bpf-program.h
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@ -43,4 +43,7 @@ int bpf_map_new(enum bpf_map_type type, size_t key_size, size_t value_size, size
int bpf_map_update_element(int fd, const void *key, void *value);
int bpf_map_lookup_element(int fd, const void *key, void *value);
int bpf_cgroup_attach_type_from_string(const char *str) _pure_;
const char *bpf_cgroup_attach_type_to_string(int attach_type) _const_;
DEFINE_TRIVIAL_CLEANUP_FUNC(BPFProgram*, bpf_program_unref);