diff options
| -rw-r--r-- | samples/bpf/Makefile | 10 | ||||
| -rw-r--r-- | samples/bpf/bpf_load.c | 667 | ||||
| -rw-r--r-- | samples/bpf/bpf_load.h | 57 | ||||
| -rw-r--r-- | samples/bpf/xdp2skb_meta_kern.c | 2 |
4 files changed, 5 insertions, 731 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 25380e04897e..05db041f8b18 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -73,7 +73,7 @@ tracex5-objs := tracex5_user.o $(TRACE_HELPERS) tracex6-objs := tracex6_user.o tracex7-objs := tracex7_user.o test_probe_write_user-objs := test_probe_write_user_user.o -trace_output-objs := trace_output_user.o $(TRACE_HELPERS) +trace_output-objs := trace_output_user.o lathist-objs := lathist_user.o offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS) spintest-objs := spintest_user.o $(TRACE_HELPERS) @@ -91,8 +91,8 @@ test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \ test_current_task_under_cgroup_user.o trace_event-objs := trace_event_user.o $(TRACE_HELPERS) sampleip-objs := sampleip_user.o $(TRACE_HELPERS) -tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o -lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o +tc_l2_redirect-objs := tc_l2_redirect_user.o +lwt_len_hist-objs := lwt_len_hist_user.o xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o test_map_in_map-objs := test_map_in_map_user.o per_socket_stats_example-objs := cookie_uid_helper_example.o @@ -108,7 +108,7 @@ xdpsock-objs := xdpsock_user.o xsk_fwd-objs := xsk_fwd.o xdp_fwd-objs := xdp_fwd_user.o task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS) -xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS) +xdp_sample_pkts-objs := xdp_sample_pkts_user.o ibumad-objs := ibumad_user.o hbm-objs := hbm.o $(CGROUP_HELPERS) @@ -197,8 +197,6 @@ TPROGS_CFLAGS += --sysroot=$(SYSROOT) TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib endif -TPROGCFLAGS_bpf_load.o += -Wno-unused-variable - TPROGS_LDLIBS += $(LIBBPF) -lelf -lz TPROGLDLIBS_tracex4 += -lrt TPROGLDLIBS_trace_output += -lrt diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c deleted file mode 100644 index c5ad528f046e..000000000000 --- a/samples/bpf/bpf_load.c +++ /dev/null @@ -1,667 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <stdio.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <libelf.h> -#include <gelf.h> -#include <errno.h> -#include <unistd.h> -#include <string.h> -#include <stdbool.h> -#include <stdlib.h> -#include <linux/bpf.h> -#include <linux/filter.h> -#include <linux/perf_event.h> -#include <linux/netlink.h> -#include <linux/rtnetlink.h> -#include <linux/types.h> -#include <sys/socket.h> -#include <sys/syscall.h> -#include <sys/ioctl.h> -#include <sys/mman.h> -#include <poll.h> -#include <ctype.h> -#include <assert.h> -#include <bpf/bpf.h> -#include "bpf_load.h" -#include "perf-sys.h" - -#define DEBUGFS "/sys/kernel/debug/tracing/" - -static char license[128]; -static int kern_version; -static bool processed_sec[128]; -char bpf_log_buf[BPF_LOG_BUF_SIZE]; -int map_fd[MAX_MAPS]; -int prog_fd[MAX_PROGS]; -int event_fd[MAX_PROGS]; -int prog_cnt; -int prog_array_fd = -1; - -struct bpf_map_data map_data[MAX_MAPS]; -int map_data_count; - -static int populate_prog_array(const char *event, int prog_fd) -{ - int ind = atoi(event), err; - - err = bpf_map_update_elem(prog_array_fd, &ind, &prog_fd, BPF_ANY); - if (err < 0) { - printf("failed to store prog_fd in prog_array\n"); - return -1; - } - return 0; -} - -static int write_kprobe_events(const char *val) -{ - int fd, ret, flags; - - if (val == NULL) - return -1; - else if (val[0] == '\0') - flags = O_WRONLY | O_TRUNC; - else - flags = O_WRONLY | O_APPEND; - - fd = open(DEBUGFS "kprobe_events", flags); - - ret = write(fd, val, strlen(val)); - close(fd); - - return ret; -} - -static int load_and_attach(const char *event, struct bpf_insn *prog, int size) -{ - bool is_socket = strncmp(event, "socket", 6) == 0; - bool is_kprobe = strncmp(event, "kprobe/", 7) == 0; - bool is_kretprobe = strncmp(event, "kretprobe/", 10) == 0; - bool is_tracepoint = strncmp(event, "tracepoint/", 11) == 0; - bool is_raw_tracepoint = strncmp(event, "raw_tracepoint/", 15) == 0; - bool is_xdp = strncmp(event, "xdp", 3) == 0; - bool is_perf_event = strncmp(event, "perf_event", 10) == 0; - bool is_cgroup_skb = strncmp(event, "cgroup/skb", 10) == 0; - bool is_cgroup_sk = strncmp(event, "cgroup/sock", 11) == 0; - bool is_sockops = strncmp(event, "sockops", 7) == 0; - bool is_sk_skb = strncmp(event, "sk_skb", 6) == 0; - bool is_sk_msg = strncmp(event, "sk_msg", 6) == 0; - size_t insns_cnt = size / sizeof(struct bpf_insn); - enum bpf_prog_type prog_type; - char buf[256]; - int fd, efd, err, id; - struct perf_event_attr attr = {}; - - attr.type = PERF_TYPE_TRACEPOINT; - attr.sample_type = PERF_SAMPLE_RAW; - attr.sample_period = 1; - attr.wakeup_events = 1; - - if (is_socket) { - prog_type = BPF_PROG_TYPE_SOCKET_FILTER; - } else if (is_kprobe || is_kretprobe) { - prog_type = BPF_PROG_TYPE_KPROBE; - } else if (is_tracepoint) { - prog_type = BPF_PROG_TYPE_TRACEPOINT; - } else if (is_raw_tracepoint) { - prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT; - } else if (is_xdp) { - prog_type = BPF_PROG_TYPE_XDP; - } else if (is_perf_event) { - prog_type = BPF_PROG_TYPE_PERF_EVENT; - } else if (is_cgroup_skb) { - prog_type = BPF_PROG_TYPE_CGROUP_SKB; - } else if (is_cgroup_sk) { - prog_type = BPF_PROG_TYPE_CGROUP_SOCK; - } else if (is_sockops) { - prog_type = BPF_PROG_TYPE_SOCK_OPS; - } else if (is_sk_skb) { - prog_type = BPF_PROG_TYPE_SK_SKB; - } else if (is_sk_msg) { - prog_type = BPF_PROG_TYPE_SK_MSG; - } else { - printf("Unknown event '%s'\n", event); - return -1; - } - - if (prog_cnt == MAX_PROGS) - return -1; - - fd = bpf_load_program(prog_type, prog, insns_cnt, license, kern_version, - bpf_log_buf, BPF_LOG_BUF_SIZE); - if (fd < 0) { - printf("bpf_load_program() err=%d\n%s", errno, bpf_log_buf); - return -1; - } - - prog_fd[prog_cnt++] = fd; - - if (is_xdp || is_perf_event || is_cgroup_skb || is_cgroup_sk) - return 0; - - if (is_socket || is_sockops || is_sk_skb || is_sk_msg) { - if (is_socket) - event += 6; - else - event += 7; - if (*event != '/') - return 0; - event++; - if (!isdigit(*event)) { - printf("invalid prog number\n"); - return -1; - } - return populate_prog_array(event, fd); - } - - if (is_raw_tracepoint) { - efd = bpf_raw_tracepoint_open(event + 15, fd); - if (efd < 0) { - printf("tracepoint %s %s\n", event + 15, strerror(errno)); - return -1; - } - event_fd[prog_cnt - 1] = efd; - return 0; - } - - if (is_kprobe || is_kretprobe) { - bool need_normal_check = true; - const char *event_prefix = ""; - - if (is_kprobe) - event += 7; - else - event += 10; - - if (*event == 0) { - printf("event name cannot be empty\n"); - return -1; - } - - if (isdigit(*event)) - return populate_prog_array(event, fd); - -#ifdef __x86_64__ - if (strncmp(event, "sys_", 4) == 0) { - snprintf(buf, sizeof(buf), "%c:__x64_%s __x64_%s", - is_kprobe ? 'p' : 'r', event, event); - err = write_kprobe_events(buf); - if (err >= 0) { - need_normal_check = false; - event_prefix = "__x64_"; - } - } -#endif - if (need_normal_check) { - snprintf(buf, sizeof(buf), "%c:%s %s", - is_kprobe ? 'p' : 'r', event, event); - err = write_kprobe_events(buf); - if (err < 0) { - printf("failed to create kprobe '%s' error '%s'\n", - event, strerror(errno)); - return -1; - } - } - - strcpy(buf, DEBUGFS); - strcat(buf, "events/kprobes/"); - strcat(buf, event_prefix); - strcat(buf, event); - strcat(buf, "/id"); - } else if (is_tracepoint) { - event += 11; - - if (*event == 0) { - printf("event name cannot be empty\n"); - return -1; - } - strcpy(buf, DEBUGFS); - strcat(buf, "events/"); - strcat(buf, event); - strcat(buf, "/id"); - } - - efd = open(buf, O_RDONLY, 0); - if (efd < 0) { - printf("failed to open event %s\n", event); - return -1; - } - - err = read(efd, buf, sizeof(buf)); - if (err < 0 || err >= sizeof(buf)) { - printf("read from '%s' failed '%s'\n", event, strerror(errno)); - return -1; - } - - close(efd); - - buf[err] = 0; - id = atoi(buf); - attr.config = id; - - efd = sys_perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0); - if (efd < 0) { - printf("event %d fd %d err %s\n", id, efd, strerror(errno)); - return -1; - } - event_fd[prog_cnt - 1] = efd; - err = ioctl(efd, PERF_EVENT_IOC_ENABLE, 0); - if (err < 0) { - printf("ioctl PERF_EVENT_IOC_ENABLE failed err %s\n", - strerror(errno)); - return -1; - } - err = ioctl(efd, PERF_EVENT_IOC_SET_BPF, fd); - if (err < 0) { - printf("ioctl PERF_EVENT_IOC_SET_BPF failed err %s\n", - strerror(errno)); - return -1; - } - - return 0; -} - -static int load_maps(struct bpf_map_data *maps, int nr_maps, - fixup_map_cb fixup_map) -{ - int i, numa_node; - - for (i = 0; i < nr_maps; i++) { - if (fixup_map) { - fixup_map(&maps[i], i); - /* Allow userspace to assign map FD prior to creation */ - if (maps[i].fd != -1) { - map_fd[i] = maps[i].fd; - continue; - } - } - - numa_node = maps[i].def.map_flags & BPF_F_NUMA_NODE ? - maps[i].def.numa_node : -1; - - if (maps[i].def.type == BPF_MAP_TYPE_ARRAY_OF_MAPS || - maps[i].def.type == BPF_MAP_TYPE_HASH_OF_MAPS) { - int inner_map_fd = map_fd[maps[i].def.inner_map_idx]; - - map_fd[i] = bpf_create_map_in_map_node(maps[i].def.type, - maps[i].name, - maps[i].def.key_size, - inner_map_fd, - maps[i].def.max_entries, - maps[i].def.map_flags, - numa_node); - } else { - map_fd[i] = bpf_create_map_node(maps[i].def.type, - maps[i].name, - maps[i].def.key_size, - maps[i].def.value_size, - maps[i].def.max_entries, - maps[i].def.map_flags, - numa_node); - } - if (map_fd[i] < 0) { - printf("failed to create map %d (%s): %d %s\n", - i, maps[i].name, errno, strerror(errno)); - return 1; - } - maps[i].fd = map_fd[i]; - - if (maps[i].def.type == BPF_MAP_TYPE_PROG_ARRAY) - prog_array_fd = map_fd[i]; - } - return 0; -} - -static int get_sec(Elf *elf, int i, GElf_Ehdr *ehdr, char **shname, - GElf_Shdr *shdr, Elf_Data **data) -{ - Elf_Scn *scn; - - scn = elf_getscn(elf, i); - if (!scn) - return 1; - - if (gelf_getshdr(scn, shdr) != shdr) - return 2; - - *shname = elf_strptr(elf, ehdr->e_shstrndx, shdr->sh_name); - if (!*shname || !shdr->sh_size) - return 3; - - *data = elf_getdata(scn, 0); - if (!*data || elf_getdata(scn, *data) != NULL) - return 4; - - return 0; -} - -static int parse_relo_and_apply(Elf_Data *data, Elf_Data *symbols, - GElf_Shdr *shdr, struct bpf_insn *insn, - struct bpf_map_data *maps, int nr_maps) -{ - int i, nrels; - - nrels = shdr->sh_size / shdr->sh_entsize; - - for (i = 0; i < nrels; i++) { - GElf_Sym sym; - GElf_Rel rel; - unsigned int insn_idx; - bool match = false; - int j, map_idx; - - gelf_getrel(data, i, &rel); - - insn_idx = rel.r_offset / sizeof(struct bpf_insn); - - gelf_getsym(symbols, GELF_R_SYM(rel.r_info), &sym); - - if (insn[insn_idx].code != (BPF_LD | BPF_IMM | BPF_DW)) { - printf("invalid relo for insn[%d].code 0x%x\n", - insn_idx, insn[insn_idx].code); - return 1; - } - insn[insn_idx].src_reg = BPF_PSEUDO_MAP_FD; - - /* Match FD relocation against recorded map_data[] offset */ - for (map_idx = 0; map_idx < nr_maps; map_idx++) { - if (maps[map_idx].elf_offset == sym.st_value) { - match = true; - break; - } - } - if (match) { - insn[insn_idx].imm = maps[map_idx].fd; - } else { - printf("invalid relo for insn[%d] no map_data match\n", - insn_idx); - return 1; - } - } - - return 0; -} - -static int cmp_symbols(const void *l, const void *r) -{ - const GElf_Sym *lsym = (const GElf_Sym *)l; - const GElf_Sym *rsym = (const GElf_Sym *)r; - - if (lsym->st_value < rsym->st_value) - return -1; - else if (lsym->st_value > rsym->st_value) - return 1; - else - return 0; -} - -static int load_elf_maps_section(struct bpf_map_data *maps, int maps_shndx, - Elf *elf, Elf_Data *symbols, int strtabidx) -{ - int map_sz_elf, map_sz_copy; - bool validate_zero = false; - Elf_Data *data_maps; - int i, nr_maps; - GElf_Sym *sym; - Elf_Scn *scn; - int copy_sz; - - if (maps_shndx < 0) - return -EINVAL; - if (!symbols) - return -EINVAL; - - /* Get data for maps section via elf index */ - scn = elf_getscn(elf, maps_shndx); - if (scn) - data_maps = elf_getdata(scn, NULL); - if (!scn || !data_maps) { - printf("Failed to get Elf_Data from maps section %d\n", - maps_shndx); - return -EINVAL; - } - - /* For each map get corrosponding symbol table entry */ - sym = calloc(MAX_MAPS+1, sizeof(GElf_Sym)); - for (i = 0, nr_maps = 0; i < symbols->d_size / sizeof(GElf_Sym); i++) { - assert(nr_maps < MAX_MAPS+1); - if (!gelf_getsym(symbols, i, &sym[nr_maps])) - continue; - if (sym[nr_maps].st_shndx != maps_shndx) - continue; - /* Only increment iif maps section */ - nr_maps++; - } - - /* Align to map_fd[] order, via sort on offset in sym.st_value */ - qsort(sym, nr_maps, sizeof(GElf_Sym), cmp_symbols); - - /* Keeping compatible with ELF maps section changes - * ------------------------------------------------ - * The program size of struct bpf_load_map_def is known by loader - * code, but struct stored in ELF file can be different. - * - * Unfortunately sym[i].st_size is zero. To calculate the - * struct size stored in the ELF file, assume all struct have - * the same size, and simply divide with number of map - * symbols. - */ - map_sz_elf = data_maps->d_size / nr_maps; - map_sz_copy = sizeof(struct bpf_load_map_def); - if (map_sz_elf < map_sz_copy) { - /* - * Backward compat, loading older ELF file with - * smaller struct, keeping remaining bytes zero. - */ - map_sz_copy = map_sz_elf; - } else if (map_sz_elf > map_sz_copy) { - /* - * Forward compat, loading newer ELF file with larger - * struct with unknown features. Assume zero means - * feature not used. Thus, validate rest of struct - * data is zero. - */ - validate_zero = true; - } - - /* Memcpy relevant part of ELF maps data to loader maps */ - for (i = 0; i < nr_maps; i++) { - struct bpf_load_map_def *def; - unsigned char *addr, *end; - const char *map_name; - size_t offset; - - map_name = elf_strptr(elf, strtabidx, sym[i].st_name); - maps[i].name = strdup(map_name); - if (!maps[i].name) { - printf("strdup(%s): %s(%d)\n", map_name, - strerror(errno), errno); - free(sym); - return -errno; - } - - /* Symbol value is offset into ELF maps section data area */ - offset = sym[i].st_value; - def = (struct bpf_load_map_def *)(data_maps->d_buf + offset); - maps[i].elf_offset = offset; - memset(&maps[i].def, 0, sizeof(struct bpf_load_map_def)); - memcpy(&maps[i].def, def, map_sz_copy); - - /* Verify no newer features were requested */ - if (validate_zero) { - addr = (unsigned char *) def + map_sz_copy; - end = (unsigned char *) def + map_sz_elf; - for (; addr < end; addr++) { - if (*addr != 0) { - free(sym); - return -EFBIG; - } - } - } - } - - free(sym); - return nr_maps; -} - -static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map) -{ - int fd, i, ret, maps_shndx = -1, strtabidx = -1; - Elf *elf; - GElf_Ehdr ehdr; - GElf_Shdr shdr, shdr_prog; - Elf_Data *data, *data_prog, *data_maps = NULL, *symbols = NULL; - char *shname, *shname_prog; - int nr_maps = 0; - - /* reset global variables */ - kern_version = 0; - memset(license, 0, sizeof(license)); - memset(processed_sec, 0, sizeof(processed_sec)); - - if (elf_version(EV_CURRENT) == EV_NONE) - return 1; - - fd = open(path, O_RDONLY, 0); - if (fd < 0) - return 1; - - elf = elf_begin(fd, ELF_C_READ, NULL); - - if (!elf) - return 1; - - if (gelf_getehdr(elf, &ehdr) != &ehdr) - return 1; - - /* clear all kprobes */ - i = write_kprobe_events(""); - - /* scan over all elf sections to get license and map info */ - for (i = 1; i < ehdr.e_shnum; i++) { - - if (get_sec(elf, i, &ehdr, &shname, &shdr, &data)) - continue; - - if (0) /* helpful for llvm debugging */ - printf("section %d:%s data %p size %zd link %d flags %d\n", - i, shname, data->d_buf, data->d_size, - shdr.sh_link, (int) shdr.sh_flags); - - if (strcmp(shname, "license") == 0) { - processed_sec[i] = true; - memcpy(license, data->d_buf, data->d_size); - } else if (strcmp(shname, "version") == 0) { - processed_sec[i] = true; - if (data->d_size != sizeof(int)) { - printf("invalid size of version section %zd\n", - data->d_size); - return 1; - } - memcpy(&kern_version, data->d_buf, sizeof(int)); - } else if (strcmp(shname, "maps") == 0) { - int j; - - maps_shndx = i; - data_maps = data; - for (j = 0; j < MAX_MAPS; j++) - map_data[j].fd = -1; - } else if (shdr.sh_type == SHT_SYMTAB) { - strtabidx = shdr.sh_link; - symbols = data; - } - } - - ret = 1; - - if (!symbols) { - printf("missing SHT_SYMTAB section\n"); - goto done; - } - - if (data_maps) { - nr_maps = load_elf_maps_section(map_data, maps_shndx, - elf, symbols, strtabidx); - if (nr_maps < 0) { - printf("Error: Failed loading ELF maps (errno:%d):%s\n", - nr_maps, strerror(-nr_maps)); - goto done; - } - if (load_maps(map_data, nr_maps, fixup_map)) - goto done; - map_data_count = nr_maps; - - processed_sec[maps_shndx] = true; - } - - /* process all relo sections, and rewrite bpf insns for maps */ - for (i = 1; i < ehdr.e_shnum; i++) { - if (processed_sec[i]) - continue; - - if (get_sec(elf, i, &ehdr, &shname, &shdr, &data)) - continue; - - if (shdr.sh_type == SHT_REL) { - struct bpf_insn *insns; - - /* locate prog sec that need map fixup (relocations) */ - if (get_sec(elf, shdr.sh_info, &ehdr, &shname_prog, - &shdr_prog, &data_prog)) - continue; - - if (shdr_prog.sh_type != SHT_PROGBITS || - !(shdr_prog.sh_flags & SHF_EXECINSTR)) - continue; - - insns = (struct bpf_insn *) data_prog->d_buf; - processed_sec[i] = true; /* relo section */ - - if (parse_relo_and_apply(data, symbols, &shdr, insns, - map_data, nr_maps)) - continue; - } - } - - /* load programs */ - for (i = 1; i < ehdr.e_shnum; i++) { - - if (processed_sec[i]) - continue; - - if (get_sec(elf, i, &ehdr, &shname, &shdr, &data)) - continue; - - if (memcmp(shname, "kprobe/", 7) == 0 || - memcmp(shname, "kretprobe/", 10) == 0 || - memcmp(shname, "tracepoint/", 11) == 0 || - memcmp(shname, "raw_tracepoint/", 15) == 0 || - memcmp(shname, "xdp", 3) == 0 || - memcmp(shname, "perf_event", 10) == 0 || - memcmp(shname, "socket", 6) == 0 || - memcmp(shname, "cgroup/", 7) == 0 || - memcmp(shname, "sockops", 7) == 0 || - memcmp(shname, "sk_skb", 6) == 0 || - memcmp(shname, "sk_msg", 6) == 0) { - ret = load_and_attach(shname, data->d_buf, - data->d_size); - if (ret != 0) - goto done; - } - } - -done: - close(fd); - return ret; -} - -int load_bpf_file(char *path) -{ - return do_load_bpf_file(path, NULL); -} - -int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map) -{ - return do_load_bpf_file(path, fixup_map); -} diff --git a/samples/bpf/bpf_load.h b/samples/bpf/bpf_load.h deleted file mode 100644 index 4fcd258c616f..000000000000 --- a/samples/bpf/bpf_load.h +++ /dev/null @@ -1,57 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __BPF_LOAD_H -#define __BPF_LOAD_H - -#include <bpf/bpf.h> - -#define MAX_MAPS 32 -#define MAX_PROGS 32 - -struct bpf_load_map_def { - unsigned int type; - unsigned int key_size; - unsigned int value_size; - unsigned int max_entries; - unsigned int map_flags; - unsigned int inner_map_idx; - unsigned int numa_node; -}; - -struct bpf_map_data { - int fd; - char *name; - size_t elf_offset; - struct bpf_load_map_def def; -}; - -typedef void (*fixup_map_cb)(struct bpf_map_data *map, int idx); - -extern int prog_fd[MAX_PROGS]; -extern int event_fd[MAX_PROGS]; -extern char bpf_log_buf[BPF_LOG_BUF_SIZE]; -extern int prog_cnt; - -/* There is a one-to-one mapping between map_fd[] and map_data[]. - * The map_data[] just contains more rich info on the given map. - */ -extern int map_fd[MAX_MAPS]; -extern struct bpf_map_data map_data[MAX_MAPS]; -extern int map_data_count; - -/* parses elf file compiled by llvm .c->.o - * . parses 'maps' section and creates maps via BPF syscall - * . parses 'license' section and passes it to syscall - * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by - * storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD - * . loads eBPF programs via BPF syscall - * - * One ELF file can contain multiple BPF programs which will be loaded - * and their FDs stored stored in prog_fd array - * - * returns zero on success - */ -int load_bpf_file(char *path); -int load_bpf_file_fixup_map(const char *path, fixup_map_cb fixup_map); - -int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags); -#endif diff --git a/samples/bpf/xdp2skb_meta_kern.c b/samples/bpf/xdp2skb_meta_kern.c index 9b783316e860..d5631014a176 100644 --- a/samples/bpf/xdp2skb_meta_kern.c +++ b/samples/bpf/xdp2skb_meta_kern.c @@ -6,7 +6,7 @@ * This uses the XDP data_meta infrastructure, and is a cooperation * between two bpf-programs (1) XDP and (2) clsact at TC-ingress hook. * - * Notice: This example does not use the BPF C-loader (bpf_load.c), + * Notice: This example does not use the BPF C-loader, * but instead rely on the iproute2 TC tool for loading BPF-objects. */ #include <uapi/linux/bpf.h> |