Commit cd33d02a authored by Kevin Wolf's avatar Kevin Wolf
Browse files

qemu-io: New command 'sleep' 



There is no easy way to check that a request correctly waits for a
different request. With a sleep command we can at least approximate it.

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent b35ee7fb

qemu-io-cmds.c

+42 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include "block/block_int.h"

#include "block/qapi.h"

#include "qemu/main-loop.h"

#include "qemu/timer.h"



#define CMD_NOFILE_OK   0x01
@@ -2053,6 +2054,46 @@ static const cmdinfo_t abort_cmd = { 
       .oneline        = "simulate a program crash using abort(3)",

};



static void sleep_cb(void *opaque)

{

    bool *expired = opaque;

    *expired = true;

}



static int sleep_f(BlockDriverState *bs, int argc, char **argv)

{

    char *endptr;

    long ms;

    struct QEMUTimer *timer;

    bool expired = false;



    ms = strtol(argv[1], &endptr, 0);

    if (ms < 0 || *endptr != '\0') {

        printf("%s is not a valid number\n", argv[1]);

        return 0;

    }



    timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);

    timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);



    while (!expired) {

        main_loop_wait(false);

    }



    timer_free(timer);



    return 0;

}



static const cmdinfo_t sleep_cmd = {

       .name           = "sleep",

       .argmin         = 1,

       .argmax         = 1,

       .cfunc          = sleep_f,

       .flags          = CMD_NOFILE_OK,

       .oneline        = "waits for the given value in milliseconds",

};



static void help_oneline(const char *cmd, const cmdinfo_t *ct)

{

    if (cmd) {
@@ -2166,4 +2207,5 @@ static void __attribute((constructor)) init_qemuio_commands(void) 
    qemuio_add_command(&resume_cmd);

    qemuio_add_command(&wait_break_cmd);

    qemuio_add_command(&abort_cmd);

    qemuio_add_command(&sleep_cmd);

}