Archipelago » qemu

#include "qemu-common.h"

#include "qemu-error.h"

#include "qemu-option.h"

#include "qemu-config.h"

#include "sysemu.h"

#include "hw/qdev.h"

static QemuOptsList qemu_drive_opts = {

    .name = "drive",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),

    .desc = {

        {

            .name = "bus",

            .type = QEMU_OPT_NUMBER,

            .help = "bus number",

        },{

            .name = "unit",

            .type = QEMU_OPT_NUMBER,

            .help = "unit number (i.e. lun for scsi)",

        },{

            .name = "if",

            .type = QEMU_OPT_STRING,

            .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",

        },{

            .name = "index",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "cyls",

            .type = QEMU_OPT_NUMBER,

            .help = "number of cylinders (ide disk geometry)",

        },{

            .name = "heads",

            .type = QEMU_OPT_NUMBER,

            .help = "number of heads (ide disk geometry)",

        },{

            .name = "secs",

            .type = QEMU_OPT_NUMBER,

            .help = "number of sectors (ide disk geometry)",

        },{

            .name = "trans",

            .type = QEMU_OPT_STRING,

            .help = "chs translation (auto, lba. none)",

        },{

            .name = "media",

            .type = QEMU_OPT_STRING,

            .help = "media type (disk, cdrom)",

        },{

            .name = "snapshot",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "file",

            .type = QEMU_OPT_STRING,

            .help = "disk image",

        },{

            .name = "cache",

            .type = QEMU_OPT_STRING,

            .help = "host cache usage (none, writeback, writethrough, unsafe)",

        },{

            .name = "aio",

            .type = QEMU_OPT_STRING,

            .help = "host AIO implementation (threads, native)",

        },{

            .name = "format",

            .type = QEMU_OPT_STRING,

            .help = "disk format (raw, qcow2, ...)",

        },{

            .name = "serial",

            .type = QEMU_OPT_STRING,

        },{

            .name = "rerror",

            .type = QEMU_OPT_STRING,

        },{

            .name = "werror",

            .type = QEMU_OPT_STRING,

        },{

            .name = "addr",

            .type = QEMU_OPT_STRING,

            .help = "pci address (virtio only)",

        },{

            .name = "readonly",

            .type = QEMU_OPT_BOOL,

        },

        { /* end if list */ }

    },

};

static QemuOptsList qemu_chardev_opts = {

    .name = "chardev",

    .implied_opt_name = "backend",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),

    .desc = {

        {

            .name = "backend",

            .type = QEMU_OPT_STRING,

        },{

            .name = "path",

            .type = QEMU_OPT_STRING,

        },{

            .name = "host",

            .type = QEMU_OPT_STRING,

        },{

            .name = "port",

            .type = QEMU_OPT_STRING,

        },{

            .name = "localaddr",

            .type = QEMU_OPT_STRING,

        },{

            .name = "localport",

            .type = QEMU_OPT_STRING,

        },{

            .name = "to",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "ipv4",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "ipv6",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "wait",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "server",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "delay",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "telnet",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "width",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "height",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "cols",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "rows",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "mux",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "signal",

            .type = QEMU_OPT_BOOL,

        },

        { /* end if list */ }

    },

};

QemuOptsList qemu_fsdev_opts = {

    .name = "fsdev",

    .implied_opt_name = "fstype",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),

    .desc = {

        {

            .name = "fstype",

            .type = QEMU_OPT_STRING,

        }, {

            .name = "path",

            .type = QEMU_OPT_STRING,

        }, {

            .name = "security_model",

            .type = QEMU_OPT_STRING,

        },

        { /*End of list */ }

    },

};

QemuOptsList qemu_virtfs_opts = {

    .name = "virtfs",

    .implied_opt_name = "fstype",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),

    .desc = {

        {

            .name = "fstype",

            .type = QEMU_OPT_STRING,

        }, {

            .name = "path",

            .type = QEMU_OPT_STRING,

        }, {

            .name = "mount_tag",

            .type = QEMU_OPT_STRING,

        }, {

            .name = "security_model",

            .type = QEMU_OPT_STRING,

        },

        { /*End of list */ }

    },

};

static QemuOptsList qemu_device_opts = {

    .name = "device",

    .implied_opt_name = "driver",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),

    .desc = {

        /*

         * no elements => accept any

         * sanity checking will happen later

         * when setting device properties

         */

        { /* end if list */ }

    },

};

static QemuOptsList qemu_netdev_opts = {

    .name = "netdev",

    .implied_opt_name = "type",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),

    .desc = {

        /*

         * no elements => accept any params

         * validation will happen later

         */

        { /* end of list */ }

    },

};

static QemuOptsList qemu_net_opts = {

    .name = "net",

    .implied_opt_name = "type",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),

    .desc = {

        /*

         * no elements => accept any params

         * validation will happen later

         */

        { /* end of list */ }

    },

};

static QemuOptsList qemu_rtc_opts = {

    .name = "rtc",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),

    .desc = {

        {

            .name = "base",

            .type = QEMU_OPT_STRING,

        },{

            .name = "clock",

            .type = QEMU_OPT_STRING,

        },{

            .name = "driftfix",

            .type = QEMU_OPT_STRING,

        },

        { /* end if list */ }

    },

};

static QemuOptsList qemu_global_opts = {

    .name = "global",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),

    .desc = {

        {

            .name = "driver",

            .type = QEMU_OPT_STRING,

        },{

            .name = "property",

            .type = QEMU_OPT_STRING,

        },{

            .name = "value",

            .type = QEMU_OPT_STRING,

        },

        { /* end if list */ }

    },

};

static QemuOptsList qemu_mon_opts = {

    .name = "mon",

    .implied_opt_name = "chardev",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),

    .desc = {

        {

            .name = "mode",

            .type = QEMU_OPT_STRING,

        },{

            .name = "chardev",

            .type = QEMU_OPT_STRING,

        },{

            .name = "default",

            .type = QEMU_OPT_BOOL,

        },

        { /* end if list */ }

    },

};

static QemuOptsList qemu_cpudef_opts = {

    .name = "cpudef",

    .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),

    .desc = {

        {

            .name = "name",

            .type = QEMU_OPT_STRING,

        },{

            .name = "level",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "vendor",

            .type = QEMU_OPT_STRING,

        },{

            .name = "family",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "model",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "stepping",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "feature_edx",      /* cpuid 0000_0001.edx */

            .type = QEMU_OPT_STRING,

        },{

            .name = "feature_ecx",      /* cpuid 0000_0001.ecx */

            .type = QEMU_OPT_STRING,

        },{

            .name = "extfeature_edx",   /* cpuid 8000_0001.edx */

            .type = QEMU_OPT_STRING,

        },{

            .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */

            .type = QEMU_OPT_STRING,

        },{

            .name = "xlevel",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "model_id",

            .type = QEMU_OPT_STRING,

        },{

            .name = "vendor_override",

            .type = QEMU_OPT_NUMBER,

        },

        { /* end of list */ }

    },

};

static QemuOptsList *vm_config_groups[32] = {

    &qemu_drive_opts,

    &qemu_chardev_opts,

    &qemu_device_opts,

    &qemu_netdev_opts,

    &qemu_net_opts,

    &qemu_rtc_opts,

    &qemu_global_opts,

    &qemu_mon_opts,

    &qemu_cpudef_opts,

    NULL,

};

static QemuOptsList *find_list(QemuOptsList **lists, const char *group)

{

    int i;

    for (i = 0; lists[i] != NULL; i++) {

        if (strcmp(lists[i]->name, group) == 0)

            break;

    }

    if (lists[i] == NULL) {

        error_report("there is no option group \"%s\"", group);

    }

    return lists[i];

}

QemuOptsList *qemu_find_opts(const char *group)

{

    return find_list(vm_config_groups, group);

}

void qemu_add_opts(QemuOptsList *list)

{

    int entries, i;

    entries = ARRAY_SIZE(vm_config_groups);

    entries--; /* keep list NULL terminated */

    for (i = 0; i < entries; i++) {

        if (vm_config_groups[i] == NULL) {

            vm_config_groups[i] = list;

            return;

        }

    }

    fprintf(stderr, "ran out of space in vm_config_groups");

    abort();

}

int qemu_set_option(const char *str)

{

    char group[64], id[64], arg[64];

    QemuOptsList *list;

    QemuOpts *opts;

    int rc, offset;

    rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);

    if (rc < 3 || str[offset] != '=') {

        error_report("can't parse: \"%s\"", str);

        return -1;

    }

    list = qemu_find_opts(group);

    if (list == NULL) {

        return -1;

    }

    opts = qemu_opts_find(list, id);

    if (!opts) {

        error_report("there is no %s \"%s\" defined",

                     list->name, id);

        return -1;

    }

    if (qemu_opt_set(opts, arg, str+offset+1) == -1) {

        return -1;

    }

    return 0;

}

int qemu_global_option(const char *str)

{

    char driver[64], property[64];

    QemuOpts *opts;

    int rc, offset;

    rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);

    if (rc < 2 || str[offset] != '=') {

        error_report("can't parse: \"%s\"", str);

        return -1;

    }

    opts = qemu_opts_create(&qemu_global_opts, NULL, 0);

    qemu_opt_set(opts, "driver", driver);

    qemu_opt_set(opts, "property", property);

    qemu_opt_set(opts, "value", str+offset+1);

    return 0;

}

struct ConfigWriteData {

    QemuOptsList *list;

    FILE *fp;

};

static int config_write_opt(const char *name, const char *value, void *opaque)

{

    struct ConfigWriteData *data = opaque;

    fprintf(data->fp, "  %s = \"%s\"\n", name, value);

    return 0;

}

static int config_write_opts(QemuOpts *opts, void *opaque)

{

    struct ConfigWriteData *data = opaque;

    const char *id = qemu_opts_id(opts);

    if (id) {

        fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);

    } else {

        fprintf(data->fp, "[%s]\n", data->list->name);

    }

    qemu_opt_foreach(opts, config_write_opt, data, 0);

    fprintf(data->fp, "\n");

    return 0;

}

void qemu_config_write(FILE *fp)

{

    struct ConfigWriteData data = { .fp = fp };

    QemuOptsList **lists = vm_config_groups;

    int i;

    fprintf(fp, "# qemu config file\n\n");

    for (i = 0; lists[i] != NULL; i++) {

        data.list = lists[i];

        qemu_opts_foreach(data.list, config_write_opts, &data, 0);

    }

}

int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)

{

    char line[1024], group[64], id[64], arg[64], value[1024];

    Location loc;

    QemuOptsList *list = NULL;

    QemuOpts *opts = NULL;

    int res = -1, lno = 0;

    loc_push_none(&loc);

    while (fgets(line, sizeof(line), fp) != NULL) {

        loc_set_file(fname, ++lno);

        if (line[0] == '\n') {

            /* skip empty lines */

            continue;

        }

        if (line[0] == '#') {

            /* comment */

            continue;

        }

        if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {

            /* group with id */

            list = find_list(lists, group);

            if (list == NULL)

                goto out;

            opts = qemu_opts_create(list, id, 1);

            continue;

        }

        if (sscanf(line, "[%63[^]]]", group) == 1) {

            /* group without id */

            list = find_list(lists, group);

            if (list == NULL)

                goto out;

            opts = qemu_opts_create(list, NULL, 0);

            continue;

        }

        if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {

            /* arg = value */

            if (opts == NULL) {

                error_report("no group defined");

                goto out;

            }

            if (qemu_opt_set(opts, arg, value) != 0) {

                goto out;

            }

            continue;

        }

        error_report("parse error");

        goto out;

    }

    if (ferror(fp)) {

        error_report("error reading file");

        goto out;

    }

    res = 0;

out:

    loc_pop(&loc);

    return res;

}

int qemu_read_config_file(const char *filename)

{

    FILE *f = fopen(filename, "r");

    int ret;

    if (f == NULL) {

        return -errno;

    }

    ret = qemu_config_parse(f, vm_config_groups, filename);

    fclose(f);

    if (ret == 0) {

        return 0;

    } else {

        return -EINVAL;

    }

}