LXR qemu/fsdev/qemu-fsdev.c

   1/*
   2 * Virtio 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 "qemu-fsdev.h"
  15#include "qemu/queue.h"
  16#include "qemu-common.h"
  17#include "qemu/config-file.h"
  18#include "qemu/error-report.h"
  19
  20static QTAILQ_HEAD(FsDriverEntry_head, FsDriverListEntry) fsdriver_entries =
  21    QTAILQ_HEAD_INITIALIZER(fsdriver_entries);
  22
  23static FsDriverTable FsDrivers[] = {
  24    { .name = "local", .ops = &local_ops},
  25#ifdef CONFIG_OPEN_BY_HANDLE
  26    { .name = "handle", .ops = &handle_ops},
  27#endif
  28    { .name = "synth", .ops = &synth_ops},
  29    { .name = "proxy", .ops = &proxy_ops},
  30};
  31
  32int qemu_fsdev_add(QemuOpts *opts)
  33{
  34    int i;
  35    struct FsDriverListEntry *fsle;
  36    const char *fsdev_id = qemu_opts_id(opts);
  37    const char *fsdriver = qemu_opt_get(opts, "fsdriver");
  38    const char *writeout = qemu_opt_get(opts, "writeout");
  39    bool ro = qemu_opt_get_bool(opts, "readonly", 0);
  40
  41    if (!fsdev_id) {
  42        error_report("fsdev: No id specified");
  43        return -1;
  44    }
  45
  46    if (fsdriver) {
  47        for (i = 0; i < ARRAY_SIZE(FsDrivers); i++) {
  48            if (strcmp(FsDrivers[i].name, fsdriver) == 0) {
  49                break;
  50            }
  51        }
  52
  53        if (i == ARRAY_SIZE(FsDrivers)) {
  54            error_report("fsdev: fsdriver %s not found", fsdriver);
  55            return -1;
  56        }
  57    } else {
  58        error_report("fsdev: No fsdriver specified");
  59        return -1;
  60    }
  61
  62    fsle = g_malloc0(sizeof(*fsle));
  63    fsle->fse.fsdev_id = g_strdup(fsdev_id);
  64    fsle->fse.ops = FsDrivers[i].ops;
  65    if (writeout) {
  66        if (!strcmp(writeout, "immediate")) {
  67            fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
  68        }
  69    }
  70    if (ro) {
  71        fsle->fse.export_flags |= V9FS_RDONLY;
  72    } else {
  73        fsle->fse.export_flags &= ~V9FS_RDONLY;
  74    }
  75
  76    if (fsle->fse.ops->parse_opts) {
  77        if (fsle->fse.ops->parse_opts(opts, &fsle->fse)) {
  78            g_free(fsle->fse.fsdev_id);
  79            g_free(fsle);
  80            return -1;
  81        }
  82    }
  83
  84    QTAILQ_INSERT_TAIL(&fsdriver_entries, fsle, next);
  85    return 0;
  86}
  87
  88FsDriverEntry *get_fsdev_fsentry(char *id)
  89{
  90    if (id) {
  91        struct FsDriverListEntry *fsle;
  92
  93        QTAILQ_FOREACH(fsle, &fsdriver_entries, next) {
  94            if (strcmp(fsle->fse.fsdev_id, id) == 0) {
  95                return &fsle->fse;
  96            }
  97        }
  98    }
  99    return NULL;
 100}
 101