diff options
Diffstat (limited to 'tools/lib/bpf/libbpf.c')
-rw-r--r-- | tools/lib/bpf/libbpf.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index ae1c5cb..4fa4bc4 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -17,6 +17,7 @@ #include <asm/unistd.h> #include <linux/kernel.h> #include <linux/bpf.h> +#include <linux/list.h> #include <libelf.h> #include <gelf.h> @@ -104,6 +105,8 @@ struct bpf_program { bpf_program_clear_priv_t clear_priv; }; +static LIST_HEAD(bpf_objects_list); + struct bpf_object { char license[64]; u32 kern_version; @@ -137,6 +140,12 @@ struct bpf_object { } *reloc; int nr_reloc; } efile; + /* + * All loaded bpf_object is linked in a list, which is + * hidden to caller. bpf_objects__<func> handlers deal with + * all objects. + */ + struct list_head list; char path[]; }; #define obj_elf_valid(o) ((o)->efile.elf) @@ -265,6 +274,9 @@ static struct bpf_object *bpf_object__new(const char *path, obj->efile.obj_buf_sz = obj_buf_sz; obj->loaded = false; + + INIT_LIST_HEAD(&obj->list); + list_add(&obj->list, &bpf_objects_list); return obj; } @@ -940,9 +952,29 @@ void bpf_object__close(struct bpf_object *obj) } zfree(&obj->programs); + list_del(&obj->list); free(obj); } +struct bpf_object * +bpf_object__next(struct bpf_object *prev) +{ + struct bpf_object *next; + + if (!prev) + next = list_first_entry(&bpf_objects_list, + struct bpf_object, + list); + else + next = list_next_entry(prev, list); + + /* Empty list is noticed here so don't need checking on entry. */ + if (&next->list == &bpf_objects_list) + return NULL; + + return next; +} + struct bpf_program * bpf_program__next(struct bpf_program *prev, struct bpf_object *obj) { |