| // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| /* Copyright (C) 2017-2018 Netronome Systems, Inc. */ |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <getopt.h> |
| #include <linux/bpf.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <bpf.h> |
| #include <libbpf.h> |
| |
| #include "main.h" |
| |
| #define BATCH_LINE_LEN_MAX 65536 |
| #define BATCH_ARG_NB_MAX 4096 |
| |
| const char *bin_name; |
| static int last_argc; |
| static char **last_argv; |
| static int (*last_do_help)(int argc, char **argv); |
| json_writer_t *json_wtr; |
| bool pretty_output; |
| bool json_output; |
| bool show_pinned; |
| bool block_mount; |
| bool verifier_logs; |
| int bpf_flags; |
| struct pinned_obj_table prog_table; |
| struct pinned_obj_table map_table; |
| |
| static void __noreturn clean_and_exit(int i) |
| { |
| if (json_output) |
| jsonw_destroy(&json_wtr); |
| |
| exit(i); |
| } |
| |
| void usage(void) |
| { |
| last_do_help(last_argc - 1, last_argv + 1); |
| |
| clean_and_exit(-1); |
| } |
| |
| static int do_help(int argc, char **argv) |
| { |
| if (json_output) { |
| jsonw_null(json_wtr); |
| return 0; |
| } |
| |
| fprintf(stderr, |
| "Usage: %s [OPTIONS] OBJECT { COMMAND | help }\n" |
| " %s batch file FILE\n" |
| " %s version\n" |
| "\n" |
| " OBJECT := { prog | map | cgroup | perf | net | feature | btf }\n" |
| " " HELP_SPEC_OPTIONS "\n" |
| "", |
| bin_name, bin_name, bin_name); |
| |
| return 0; |
| } |
| |
| static int do_version(int argc, char **argv) |
| { |
| if (json_output) { |
| jsonw_start_object(json_wtr); |
| jsonw_name(json_wtr, "version"); |
| jsonw_printf(json_wtr, "\"%s\"", BPFTOOL_VERSION); |
| jsonw_end_object(json_wtr); |
| } else { |
| printf("%s v%s\n", bin_name, BPFTOOL_VERSION); |
| } |
| return 0; |
| } |
| |
| static int __printf(2, 0) |
| print_all_levels(__maybe_unused enum libbpf_print_level level, |
| const char *format, va_list args) |
| { |
| return vfprintf(stderr, format, args); |
| } |
| |
| int cmd_select(const struct cmd *cmds, int argc, char **argv, |
| int (*help)(int argc, char **argv)) |
| { |
| unsigned int i; |
| |
| last_argc = argc; |
| last_argv = argv; |
| last_do_help = help; |
| |
| if (argc < 1 && cmds[0].func) |
| return cmds[0].func(argc, argv); |
| |
| for (i = 0; cmds[i].func; i++) |
| if (is_prefix(*argv, cmds[i].cmd)) |
| return cmds[i].func(argc - 1, argv + 1); |
| |
| help(argc - 1, argv + 1); |
| |
| return -1; |
| } |
| |
| bool is_prefix(const char *pfx, const char *str) |
| { |
| if (!pfx) |
| return false; |
| if (strlen(str) < strlen(pfx)) |
| return false; |
| |
| return !memcmp(str, pfx, strlen(pfx)); |
| } |
| |
| /* Last argument MUST be NULL pointer */ |
| int detect_common_prefix(const char *arg, ...) |
| { |
| unsigned int count = 0; |
| const char *ref; |
| char msg[256]; |
| va_list ap; |
| |
| snprintf(msg, sizeof(msg), "ambiguous prefix: '%s' could be '", arg); |
| va_start(ap, arg); |
| while ((ref = va_arg(ap, const char *))) { |
| if (!is_prefix(arg, ref)) |
| continue; |
| count++; |
| if (count > 1) |
| strncat(msg, "' or '", sizeof(msg) - strlen(msg) - 1); |
| strncat(msg, ref, sizeof(msg) - strlen(msg) - 1); |
| } |
| va_end(ap); |
| strncat(msg, "'", sizeof(msg) - strlen(msg) - 1); |
| |
| if (count >= 2) { |
| p_err("%s", msg); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void fprint_hex(FILE *f, void *arg, unsigned int n, const char *sep) |
| { |
| unsigned char *data = arg; |
| unsigned int i; |
| |
| for (i = 0; i < n; i++) { |
| const char *pfx = ""; |
| |
| if (!i) |
| /* nothing */; |
| else if (!(i % 16)) |
| fprintf(f, "\n"); |
| else if (!(i % 8)) |
| fprintf(f, " "); |
| else |
| pfx = sep; |
| |
| fprintf(f, "%s%02hhx", i ? pfx : "", data[i]); |
| } |
| } |
| |
| /* Split command line into argument vector. */ |
| static int make_args(char *line, char *n_argv[], int maxargs, int cmd_nb) |
| { |
| static const char ws[] = " \t\r\n"; |
| char *cp = line; |
| int n_argc = 0; |
| |
| while (*cp) { |
| /* Skip leading whitespace. */ |
| cp += strspn(cp, ws); |
| |
| if (*cp == '\0') |
| break; |
| |
| if (n_argc >= (maxargs - 1)) { |
| p_err("too many arguments to command %d", cmd_nb); |
| return -1; |
| } |
| |
| /* Word begins with quote. */ |
| if (*cp == '\'' || *cp == '"') { |
| char quote = *cp++; |
| |
| n_argv[n_argc++] = cp; |
| /* Find ending quote. */ |
| cp = strchr(cp, quote); |
| if (!cp) { |
| p_err("unterminated quoted string in command %d", |
| cmd_nb); |
| return -1; |
| } |
| } else { |
| n_argv[n_argc++] = cp; |
| |
| /* Find end of word. */ |
| cp += strcspn(cp, ws); |
| if (*cp == '\0') |
| break; |
| } |
| |
| /* Separate words. */ |
| *cp++ = 0; |
| } |
| n_argv[n_argc] = NULL; |
| |
| return n_argc; |
| } |
| |
| static int do_batch(int argc, char **argv); |
| |
| static const struct cmd cmds[] = { |
| { "help", do_help }, |
| { "batch", do_batch }, |
| { "prog", do_prog }, |
| { "map", do_map }, |
| { "cgroup", do_cgroup }, |
| { "perf", do_perf }, |
| { "net", do_net }, |
| { "feature", do_feature }, |
| { "btf", do_btf }, |
| { "version", do_version }, |
| { 0 } |
| }; |
| |
| static int do_batch(int argc, char **argv) |
| { |
| char buf[BATCH_LINE_LEN_MAX], contline[BATCH_LINE_LEN_MAX]; |
| char *n_argv[BATCH_ARG_NB_MAX]; |
| unsigned int lines = 0; |
| int n_argc; |
| FILE *fp; |
| char *cp; |
| int err; |
| int i; |
| |
| if (argc < 2) { |
| p_err("too few parameters for batch"); |
| return -1; |
| } else if (!is_prefix(*argv, "file")) { |
| p_err("expected 'file', got: %s", *argv); |
| return -1; |
| } else if (argc > 2) { |
| p_err("too many parameters for batch"); |
| return -1; |
| } |
| NEXT_ARG(); |
| |
| if (!strcmp(*argv, "-")) |
| fp = stdin; |
| else |
| fp = fopen(*argv, "r"); |
| if (!fp) { |
| p_err("Can't open file (%s): %s", *argv, strerror(errno)); |
| return -1; |
| } |
| |
| if (json_output) |
| jsonw_start_array(json_wtr); |
| while (fgets(buf, sizeof(buf), fp)) { |
| cp = strchr(buf, '#'); |
| if (cp) |
| *cp = '\0'; |
| |
| if (strlen(buf) == sizeof(buf) - 1) { |
| errno = E2BIG; |
| break; |
| } |
| |
| /* Append continuation lines if any (coming after a line ending |
| * with '\' in the batch file). |
| */ |
| while ((cp = strstr(buf, "\\\n")) != NULL) { |
| if (!fgets(contline, sizeof(contline), fp) || |
| strlen(contline) == 0) { |
| p_err("missing continuation line on command %d", |
| lines); |
| err = -1; |
| goto err_close; |
| } |
| |
| cp = strchr(contline, '#'); |
| if (cp) |
| *cp = '\0'; |
| |
| if (strlen(buf) + strlen(contline) + 1 > sizeof(buf)) { |
| p_err("command %d is too long", lines); |
| err = -1; |
| goto err_close; |
| } |
| buf[strlen(buf) - 2] = '\0'; |
| strcat(buf, contline); |
| } |
| |
| n_argc = make_args(buf, n_argv, BATCH_ARG_NB_MAX, lines); |
| if (!n_argc) |
| continue; |
| if (n_argc < 0) |
| goto err_close; |
| |
| if (json_output) { |
| jsonw_start_object(json_wtr); |
| jsonw_name(json_wtr, "command"); |
| jsonw_start_array(json_wtr); |
| for (i = 0; i < n_argc; i++) |
| jsonw_string(json_wtr, n_argv[i]); |
| jsonw_end_array(json_wtr); |
| jsonw_name(json_wtr, "output"); |
| } |
| |
| err = cmd_select(cmds, n_argc, n_argv, do_help); |
| |
| if (json_output) |
| jsonw_end_object(json_wtr); |
| |
| if (err) |
| goto err_close; |
| |
| lines++; |
| } |
| |
| if (errno && errno != ENOENT) { |
| p_err("reading batch file failed: %s", strerror(errno)); |
| err = -1; |
| } else { |
| if (!json_output) |
| printf("processed %d commands\n", lines); |
| err = 0; |
| } |
| err_close: |
| if (fp != stdin) |
| fclose(fp); |
| |
| if (json_output) |
| jsonw_end_array(json_wtr); |
| |
| return err; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| static const struct option options[] = { |
| { "json", no_argument, NULL, 'j' }, |
| { "help", no_argument, NULL, 'h' }, |
| { "pretty", no_argument, NULL, 'p' }, |
| { "version", no_argument, NULL, 'V' }, |
| { "bpffs", no_argument, NULL, 'f' }, |
| { "mapcompat", no_argument, NULL, 'm' }, |
| { "nomount", no_argument, NULL, 'n' }, |
| { "debug", no_argument, NULL, 'd' }, |
| { 0 } |
| }; |
| int opt, ret; |
| |
| last_do_help = do_help; |
| pretty_output = false; |
| json_output = false; |
| show_pinned = false; |
| block_mount = false; |
| bin_name = argv[0]; |
| |
| hash_init(prog_table.table); |
| hash_init(map_table.table); |
| |
| opterr = 0; |
| while ((opt = getopt_long(argc, argv, "Vhpjfmnd", |
| options, NULL)) >= 0) { |
| switch (opt) { |
| case 'V': |
| return do_version(argc, argv); |
| case 'h': |
| return do_help(argc, argv); |
| case 'p': |
| pretty_output = true; |
| /* fall through */ |
| case 'j': |
| if (!json_output) { |
| json_wtr = jsonw_new(stdout); |
| if (!json_wtr) { |
| p_err("failed to create JSON writer"); |
| return -1; |
| } |
| json_output = true; |
| } |
| jsonw_pretty(json_wtr, pretty_output); |
| break; |
| case 'f': |
| show_pinned = true; |
| break; |
| case 'm': |
| bpf_flags = MAPS_RELAX_COMPAT; |
| break; |
| case 'n': |
| block_mount = true; |
| break; |
| case 'd': |
| libbpf_set_print(print_all_levels); |
| verifier_logs = true; |
| break; |
| default: |
| p_err("unrecognized option '%s'", argv[optind - 1]); |
| if (json_output) |
| clean_and_exit(-1); |
| else |
| usage(); |
| } |
| } |
| |
| argc -= optind; |
| argv += optind; |
| if (argc < 0) |
| usage(); |
| |
| ret = cmd_select(cmds, argc, argv, do_help); |
| |
| if (json_output) |
| jsonw_destroy(&json_wtr); |
| |
| if (show_pinned) { |
| delete_pinned_obj_table(&prog_table); |
| delete_pinned_obj_table(&map_table); |
| } |
| |
| return ret; |
| } |