Archipelago » qemu

/*

 * Virtio 9p

 *

 * Copyright IBM, Corp. 2010

 *

 * Authors:

 *  Gautham R Shenoy <ego@in.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2.  See

 * the COPYING file in the top-level directory.

 *

 */

#include <stdio.h>

#include <string.h>

#include "qemu-fsdev.h"

#include "qemu-queue.h"

#include "osdep.h"

#include "qemu-common.h"

#include "qemu-config.h"

static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries =

    QTAILQ_HEAD_INITIALIZER(fsdriver_entries);

static FsDriverTable FsDrivers[] = {

    { .name = "local", .ops = &local_ops},

#ifdef CONFIG_OPEN_BY_HANDLE

    { .name = "handle", .ops = &handle_ops},

#endif

    { .name = "synth", .ops = &synth_ops},

};

int qemu_fsdev_add(QemuOpts *opts)

{

    struct FsDriverListEntry *fsle;

    int i;

    const char *fsdev_id = qemu_opts_id(opts);

    const char *fsdriver = qemu_opt_get(opts, "fsdriver");

    const char *path = qemu_opt_get(opts, "path");

    const char *sec_model = qemu_opt_get(opts, "security_model");

    const char *writeout = qemu_opt_get(opts, "writeout");

    bool ro = qemu_opt_get_bool(opts, "readonly", 0);

    if (!fsdev_id) {

        fprintf(stderr, "fsdev: No id specified\n");

        return -1;

    }

    if (fsdriver) {

        for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) {

            if (strcmp(FsDrivers[i].name, fsdriver) == 0) {

                break;

            }

        }

        if (i == ARRAY_SIZE(FsDrivers)) {

            fprintf(stderr, "fsdev: fsdriver %s not found\n", fsdriver);

            return -1;

        }

    } else {

        fprintf(stderr, "fsdev: No fsdriver specified\n");

        return -1;

    }

    if (!strcmp(fsdriver, "local") && !sec_model) {

        fprintf(stderr, "security model not specified, "

                "local fs needs security model\nvalid options are:"

                "\tsecurity_model=[passthrough|mapped|none]\n");

        return -1;

    }

    if (strcmp(fsdriver, "local") && sec_model) {

        fprintf(stderr, "only local fs driver needs security model\n");

        return -1;

    }

    if (!path) {

        fprintf(stderr, "fsdev: No path specified.\n");

        return -1;

    }

    fsle = g_malloc(sizeof(*fsle));

    fsle->fse.fsdev_id = g_strdup(fsdev_id);

    fsle->fse.path = g_strdup(path);

    fsle->fse.ops = FsDrivers[i].ops;

    fsle->fse.export_flags = 0;

    if (writeout) {

        if (!strcmp(writeout, "immediate")) {

            fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;

        }

    }

    if (ro) {

        fsle->fse.export_flags |= V9FS_RDONLY;

    } else {

        fsle->fse.export_flags &= ~V9FS_RDONLY;

    }

    if (strcmp(fsdriver, "local")) {

        goto done;

    }

    if (!strcmp(sec_model, "passthrough")) {

        fsle->fse.export_flags |= V9FS_SM_PASSTHROUGH;

    } else if (!strcmp(sec_model, "mapped")) {

        fsle->fse.export_flags |= V9FS_SM_MAPPED;

    } else if (!strcmp(sec_model, "none")) {

        fsle->fse.export_flags |= V9FS_SM_NONE;

    } else {

        fprintf(stderr, "Invalid security model %s specified, valid options are"

                "\n\t [passthrough|mapped|none]\n", sec_model);

        return -1;

    }

done:

    QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);

    return 0;

}

FsDriverEntry *get_fsdev_fsentry(char *id)

{

    if (id) {

        struct FsDriverListEntry *fsle;

        QTAILQ_FOREACH(fsle, &fsdriver_entries, next) {

            if (strcmp(fsle->fse.fsdev_id, id) == 0) {

                return &fsle->fse;

            }

        }

    }

    return NULL;

}

static void fsdev_register_config(void)

{

    qemu_add_opts(&qemu_fsdev_opts);

    qemu_add_opts(&qemu_virtfs_opts);

}

machine_init(fsdev_register_config);