Commit 57975222 authored by Kevin Wolf's avatar Kevin Wolf
Browse files

blockdev: Rename I/O throttling options for QMP 



In QMP, we want to use dashes instead of underscores in QMP argument
names, and use nested options for throttling.

The new option names affect the command line as well, but for
compatibility drive_init() will convert the old option names before
calling into the code that will be shared between -drive and
blockdev-add.

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
parent 0dd6c526

blockdev.c

+39 −13
Original line number Diff line number Diff line
@@ -312,7 +312,8 @@ static bool do_check_io_limits(BlockIOLimit *io_limits, Error **errp) 
    return true;

}



DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)

static DriveInfo *blockdev_init(QemuOpts *all_opts,

                                BlockInterfaceType block_default_type)

{

    const char *buf;

    const char *file = NULL;
@@ -485,17 +486,17 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) 


    /* disk I/O throttling */

    io_limits.bps[BLOCK_IO_LIMIT_TOTAL]  =

                           qemu_opt_get_number(opts, "bps", 0);

        qemu_opt_get_number(opts, "throttling.bps-total", 0);

    io_limits.bps[BLOCK_IO_LIMIT_READ]   =

                           qemu_opt_get_number(opts, "bps_rd", 0);

        qemu_opt_get_number(opts, "throttling.bps-read", 0);

    io_limits.bps[BLOCK_IO_LIMIT_WRITE]  =

                           qemu_opt_get_number(opts, "bps_wr", 0);

        qemu_opt_get_number(opts, "throttling.bps-write", 0);

    io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =

                           qemu_opt_get_number(opts, "iops", 0);

        qemu_opt_get_number(opts, "throttling.iops-total", 0);

    io_limits.iops[BLOCK_IO_LIMIT_READ]  =

                           qemu_opt_get_number(opts, "iops_rd", 0);

        qemu_opt_get_number(opts, "throttling.iops-read", 0);

    io_limits.iops[BLOCK_IO_LIMIT_WRITE] =

                           qemu_opt_get_number(opts, "iops_wr", 0);

        qemu_opt_get_number(opts, "throttling.iops-write", 0);



    if (!do_check_io_limits(&io_limits, &error)) {

        error_report("%s", error_get_pretty(error));
@@ -726,6 +727,31 @@ err: 
    return NULL;

}



static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)

{

    const char *value;



    value = qemu_opt_get(opts, from);

    if (value) {

        qemu_opt_set(opts, to, value);

        qemu_opt_unset(opts, from);

    }

}



DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)

{

    /* Change legacy command line options into QMP ones */

    qemu_opt_rename(all_opts, "iops", "throttling.iops-total");

    qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");

    qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");



    qemu_opt_rename(all_opts, "bps", "throttling.bps-total");

    qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");

    qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");



    return blockdev_init(all_opts, block_default_type);

}



void do_commit(Monitor *mon, const QDict *qdict)

{

    const char *device = qdict_get_str(qdict, "device");
@@ -1855,27 +1881,27 @@ QemuOptsList qemu_common_drive_opts = { 
            .type = QEMU_OPT_BOOL,

            .help = "open drive file as read-only",

        },{

            .name = "iops",

            .name = "throttling.iops-total",

            .type = QEMU_OPT_NUMBER,

            .help = "limit total I/O operations per second",

        },{

            .name = "iops_rd",

            .name = "throttling.iops-read",

            .type = QEMU_OPT_NUMBER,

            .help = "limit read operations per second",

        },{

            .name = "iops_wr",

            .name = "throttling.iops-write",

            .type = QEMU_OPT_NUMBER,

            .help = "limit write operations per second",

        },{

            .name = "bps",

            .name = "throttling.bps-total",

            .type = QEMU_OPT_NUMBER,

            .help = "limit total bytes per second",

        },{

            .name = "bps_rd",

            .name = "throttling.bps-read",

            .type = QEMU_OPT_NUMBER,

            .help = "limit read bytes per second",

        },{

            .name = "bps_wr",

            .name = "throttling.bps-write",

            .type = QEMU_OPT_NUMBER,

            .help = "limit write bytes per second",

        },{