LXR qemu/fsdev/qemu-fsdev.c

   1/*
   2 * 9p
   3 *
   4 * Copyright IBM, Corp. 2010
   5 *
   6 * Authors:
   7 *  Gautham R Shenoy <ego@in.ibm.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2.  See
  10 * the COPYING file in the top-level directory.
  11 */
  12
  13#include "qemu/osdep.h"
  14#include "qapi/error.h"
  15#include "qemu-fsdev.h"
  16#include "qemu/queue.h"
  17#include "qemu/config-file.h"
  18#include "qemu/error-report.h"
  19#include "qemu/option.h"
  20
  21static QTAILQ_HEAD(, FsDriverListEntry) fsdriver_entries =
  22    QTAILQ_HEAD_INITIALIZER(fsdriver_entries);
  23
  24static FsDriverTable FsDrivers[] = {
  25    { .name = "local", .ops = &local_ops},
  26    { .name = "synth", .ops = &synth_ops},
  27    { .name = "proxy", .ops = &proxy_ops},
  28};
  29
  30int qemu_fsdev_add(QemuOpts *opts, Error **errp)
  31{
  32    int i;
  33    struct FsDriverListEntry *fsle;
  34    const char *fsdev_id = qemu_opts_id(opts);
  35    const char *fsdriver = qemu_opt_get(opts, "fsdriver");
  36    const char *writeout = qemu_opt_get(opts, "writeout");
  37    bool ro = qemu_opt_get_bool(opts, "readonly", 0);
  38
  39    if (!fsdev_id) {
  40        error_setg(errp, "fsdev: No id specified");
  41        return -1;
  42    }
  43
  44    if (fsdriver) {
  45        for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) {
  46            if (strcmp(FsDrivers[i].name, fsdriver) == 0) {
  47                break;
  48            }
  49        }
  50
  51        if (i == ARRAY_SIZE(FsDrivers)) {
  52            error_setg(errp, "fsdev: fsdriver %s not found", fsdriver);
  53            return -1;
  54        }
  55    } else {
  56        error_setg(errp, "fsdev: No fsdriver specified");
  57        return -1;
  58    }
  59
  60    fsle = g_malloc0(sizeof(*fsle));
  61    fsle->fse.fsdev_id = g_strdup(fsdev_id);
  62    fsle->fse.ops = FsDrivers[i].ops;
  63    if (writeout) {
  64        if (!strcmp(writeout, "immediate")) {
  65            fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
  66        }
  67    }
  68    if (ro) {
  69        fsle->fse.export_flags |= V9FS_RDONLY;
  70    } else {
  71        fsle->fse.export_flags &= ~V9FS_RDONLY;
  72    }
  73
  74    if (fsle->fse.ops->parse_opts) {
  75        if (fsle->fse.ops->parse_opts(opts, &fsle->fse, errp)) {
  76            g_free(fsle->fse.fsdev_id);
  77            g_free(fsle);
  78            return -1;
  79        }
  80    }
  81
  82    QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);
  83    return 0;
  84}
  85
  86FsDriverEntry *get_fsdev_fsentry(char *id)
  87{
  88    if (id) {
  89        struct FsDriverListEntry *fsle;
  90
  91        QTAILQ_FOREACH(fsle, &fsdriver_entries, next) {
  92            if (strcmp(fsle->fse.fsdev_id, id) == 0) {
  93                return &fsle->fse;
  94            }
  95        }
  96    }
  97    return NULL;
  98}
  99