builtin-data.c

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// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include "builtin.h"
#include "perf.h"
#include "debug.h"
#include <subcmd/parse-options.h>
#include "data-convert.h"
#include "data-convert-bt.h"

typedef int (*data_cmd_fn_t)(int argc, const char **argv);

struct data_cmd {
    const char  *name;
    const char  *summary;
    data_cmd_fn_t   fn;
};

static struct data_cmd data_cmds[];

#define for_each_cmd(cmd) \
    for (cmd = data_cmds; cmd && cmd->name; cmd++)

static const struct option data_options[] = {
    OPT_END()
};

static const char * const data_subcommands[] = { "convert", NULL };

static const char *data_usage[] = {
    "perf data [<common options>] <command> [<options>]",
    NULL
};

static void print_usage(void)
{
    struct data_cmd *cmd;

    printf("Usage:\n");
    printf("\t%s\n\n", data_usage[0]);
    printf("\tAvailable commands:\n");

    for_each_cmd(cmd) {
        printf("\t %s\t- %s\n", cmd->name, cmd->summary);
    }

    printf("\n");
}

static const char * const data_convert_usage[] = {
    "perf data convert [<options>]",
    NULL
};

static int cmd_data_convert(int argc, const char **argv)
{
    const char *to_ctf     = NULL;
    struct perf_data_convert_opts opts = {
        .force = false,
        .all = false,
    };
    const struct option options[] = {
        OPT_INCR('v', "verbose", &verbose, "be more verbose"),
        OPT_STRING('i', "input", &input_name, "file", "input file name"),
#ifdef HAVE_LIBBABELTRACE_SUPPORT
        OPT_STRING(0, "to-ctf", &to_ctf, NULL, "Convert to CTF format"),
#endif
        OPT_BOOLEAN('f', "force", &opts.force, "don't complain, do it"),
        OPT_BOOLEAN(0, "all", &opts.all, "Convert all events"),
        OPT_END()
    };

#ifndef HAVE_LIBBABELTRACE_SUPPORT
    pr_err("No conversion support compiled in. perf should be compiled with environment variables LIBBABELTRACE=1 and LIBBABELTRACE_DIR=/path/to/libbabeltrace/\n");
    return -1;
#endif

    argc = parse_options(argc, argv, options,
                 data_convert_usage, 0);
    if (argc) {
        usage_with_options(data_convert_usage, options);
        return -1;
    }

    if (to_ctf) {
#ifdef HAVE_LIBBABELTRACE_SUPPORT
        return bt_convert__perf2ctf(input_name, to_ctf, &opts);
#else
        pr_err("The libbabeltrace support is not compiled in.\n");
        return -1;
#endif
    }

    return 0;
}

static struct data_cmd data_cmds[] = {
    { "convert", "converts data file between formats", cmd_data_convert },
    { .name = NULL, },
};

int cmd_data(int argc, const char **argv)
{
    struct data_cmd *cmd;
    const char *cmdstr;

    /* No command specified. */
    if (argc < 2)
        goto usage;

    argc = parse_options_subcommand(argc, argv, data_options, data_subcommands, data_usage,
                 PARSE_OPT_STOP_AT_NON_OPTION);
    if (argc < 1)
        goto usage;

    cmdstr = argv[0];

    for_each_cmd(cmd) {
        if (strcmp(cmd->name, cmdstr))
            continue;

        return cmd->fn(argc, argv);
    }

    pr_err("Unknown command: %s\n", cmdstr);
usage:
    print_usage();
    return -1;
}