shared: bpf_attach_type {from,to} string

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.

diff --git a/src/shared/bpf-program.c b/src/shared/bpf-program.c
index d67ada23b0cf1d205f7b517ce8a8cfc728bc5fc0..a8a34521fd640c24c1a816e39c8424e4769f9f86 100644 (file)
--- a/src/shared/bpf-program.c
+++ b/src/shared/bpf-program.c
@@ -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. */

diff --git a/src/shared/bpf-program.h b/src/shared/bpf-program.h
index 243cef923fa6c0a884e307cb9fa98c9acda20512..86fd338c93c44d61a18d4c792bcff75e84060dc5 100644 (file)
--- a/src/shared/bpf-program.h
+++ b/src/shared/bpf-program.h
@@ -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);