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authorChristian Breunig <christian@breunig.cc>2023-06-12 19:57:28 +0200
committerChristian Breunig <christian@breunig.cc>2023-06-12 19:57:28 +0200
commitfcb5d0fdafeebe49f42799b1d0d056c4b67bcc16 (patch)
tree28a5a272cc66cd5c6b4bc1132b4db5a455ca3214 /src/xdp/common/common_libbpf.c
parentf9fa1e99e042846a8089ae2b4bc41dd8f3e3eb7c (diff)
downloadvyos-1x-fcb5d0fdafeebe49f42799b1d0d056c4b67bcc16.tar.gz
vyos-1x-fcb5d0fdafeebe49f42799b1d0d056c4b67bcc16.zip
T5286: drop XDP support for ethernet and bonding interfaces
... this is a step towards a new and better implementation that will utilize VPP.
Diffstat (limited to 'src/xdp/common/common_libbpf.c')
-rw-r--r--src/xdp/common/common_libbpf.c161
1 files changed, 0 insertions, 161 deletions
diff --git a/src/xdp/common/common_libbpf.c b/src/xdp/common/common_libbpf.c
deleted file mode 100644
index 443ca4c66..000000000
--- a/src/xdp/common/common_libbpf.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/* Common function that with time should be moved to libbpf */
-
-#include <errno.h>
-#include <string.h>
-
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-
-#include "common_libbpf.h"
-
-/* From: include/linux/err.h */
-#define MAX_ERRNO 4095
-#define IS_ERR_VALUE(x) ((x) >= (unsigned long)-MAX_ERRNO)
-static inline bool IS_ERR_OR_NULL(const void *ptr)
-{
- return (!ptr) || IS_ERR_VALUE((unsigned long)ptr);
-}
-
-#define pr_warning printf
-
-/* As close as possible to libbpf bpf_prog_load_xattr(), with the
- * difference of handling pinned maps.
- */
-int bpf_prog_load_xattr_maps(const struct bpf_prog_load_attr_maps *attr,
- struct bpf_object **pobj, int *prog_fd)
-{
- struct bpf_program *prog, *first_prog = NULL;
- enum bpf_attach_type expected_attach_type;
- enum bpf_prog_type prog_type;
- struct bpf_object *obj;
- struct bpf_map *map;
- int err;
- int i;
-
- if (!attr)
- return -EINVAL;
- if (!attr->file)
- return -EINVAL;
-
- obj = bpf_object__open_file(attr->file, NULL);
-
- if (libbpf_get_error(obj))
- return -EINVAL;
-
- prog = bpf_object__next_program(obj, NULL);
- bpf_program__set_type(prog, attr->prog_type);
-
- bpf_object__for_each_program(prog, obj) {
- /*
- * If type is not specified, try to guess it based on
- * section name.
- */
- prog_type = attr->prog_type;
- // Was: prog->prog_ifindex = attr->ifindex;
- bpf_program__set_ifindex(prog, attr->ifindex);
-
- expected_attach_type = attr->expected_attach_type;
-#if 0 /* Use internal libbpf variables */
- if (prog_type == BPF_PROG_TYPE_UNSPEC) {
- err = bpf_program__identify_section(prog, &prog_type,
- &expected_attach_type);
- if (err < 0) {
- bpf_object__close(obj);
- return -EINVAL;
- }
- }
-#endif
-
- bpf_program__set_type(prog, prog_type);
- bpf_program__set_expected_attach_type(prog,
- expected_attach_type);
-
- if (!first_prog)
- first_prog = prog;
- }
-
- /* Reset attr->pinned_maps.map_fd to identify successful file load */
- for (i = 0; i < attr->nr_pinned_maps; i++)
- attr->pinned_maps[i].map_fd = -1;
-
- bpf_map__for_each(map, obj) {
- const char* mapname = bpf_map__name(map);
-
- if (bpf_map__type(map) != BPF_MAP_TYPE_PERF_EVENT_ARRAY)
- bpf_map__set_ifindex(map, attr->ifindex);
- /* Was: map->map_ifindex = attr->ifindex; */
-
- for (i = 0; i < attr->nr_pinned_maps; i++) {
- struct bpf_pinned_map *pin_map = &attr->pinned_maps[i];
- int fd;
-
- if (strcmp(mapname, pin_map->name) != 0)
- continue;
-
- /* Matched, try opening pinned file */
- fd = bpf_obj_get(pin_map->filename);
- if (fd > 0) {
- /* Use FD from pinned map as replacement */
- bpf_map__reuse_fd(map, fd);
- /* TODO: Might want to set internal map "name"
- * if opened pinned map didn't, to allow
- * bpf_object__find_map_fd_by_name() to work.
- */
- pin_map->map_fd = fd;
- continue;
- }
- /* Could not open pinned filename map, then this prog
- * should then pin the map, BUT this can only happen
- * after bpf_object__load().
- */
- }
- }
-
- if (!first_prog) {
- pr_warning("object file doesn't contain bpf program\n");
- bpf_object__close(obj);
- return -ENOENT;
- }
-
- err = bpf_object__load(obj);
- if (err) {
- bpf_object__close(obj);
- return -EINVAL;
- }
-
- /* Pin the maps that were not loaded via pinned filename */
- bpf_map__for_each(map, obj) {
- const char* mapname = bpf_map__name(map);
-
- for (i = 0; i < attr->nr_pinned_maps; i++) {
- struct bpf_pinned_map *pin_map = &attr->pinned_maps[i];
- int err;
-
- if (strcmp(mapname, pin_map->name) != 0)
- continue;
-
- /* Matched, check if map is already loaded */
- if (pin_map->map_fd != -1)
- continue;
-
- /* Needs to be pinned */
- err = bpf_map__pin(map, pin_map->filename);
- if (err)
- continue;
- pin_map->map_fd = bpf_map__fd(map);
- }
- }
-
- /* Help user if requested map name that doesn't exist */
- for (i = 0; i < attr->nr_pinned_maps; i++) {
- struct bpf_pinned_map *pin_map = &attr->pinned_maps[i];
-
- if (pin_map->map_fd < 0)
- pr_warning("%s() requested mapname:%s not seen\n",
- __func__, pin_map->name);
- }
-
- *pobj = obj;
- *prog_fd = bpf_program__fd(first_prog);
- return 0;
-}